EP0752296A1 - Setting tool for anchor bolts - Google Patents

Setting tool for anchor bolts Download PDF

Info

Publication number
EP0752296A1
EP0752296A1 EP96108549A EP96108549A EP0752296A1 EP 0752296 A1 EP0752296 A1 EP 0752296A1 EP 96108549 A EP96108549 A EP 96108549A EP 96108549 A EP96108549 A EP 96108549A EP 0752296 A1 EP0752296 A1 EP 0752296A1
Authority
EP
European Patent Office
Prior art keywords
expansion
piston
clamping
setting tool
anchor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP96108549A
Other languages
German (de)
French (fr)
Other versions
EP0752296B1 (en
Inventor
Herbert Erath
Christian Schmid
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fischerwerke Artur Fischer GmbH and Co KG
Original Assignee
Fischerwerke Artur Fischer GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fischerwerke Artur Fischer GmbH and Co KG filed Critical Fischerwerke Artur Fischer GmbH and Co KG
Publication of EP0752296A1 publication Critical patent/EP0752296A1/en
Application granted granted Critical
Publication of EP0752296B1 publication Critical patent/EP0752296B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B31/00—Hand tools for applying fasteners
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49938—Radially expanding part in cavity, aperture, or hollow body
    • Y10T29/49943—Riveting

Definitions

  • the invention relates to a setting tool for setting an expansion anchor in a hole having an undercut.
  • Expansion anchors have an expansion head that widens, for example, in a conical shape away from a shaft. It is inserted into a borehole with an undercut, which has the shape of a hollow cone, for example.
  • an expansion sleeve on the shaft of the expansion anchor, either the sleeve itself or an expansion part is pushed onto the expansion head and expanded in the process, as a result of which the expansion anchor is positively anchored in the borehole.
  • the expansion anchor When the expansion sleeve or the expansion part is pushed onto the expansion head of the expansion anchor, the expansion anchor is pressed into the borehole, its expansion head presses against a bottom of the borehole. Slabs or tiles in which an expansion anchor is placed can break at the bottom of the borehole, especially if the remaining wall thickness is small there.
  • the setting tool according to the invention has a tensioning device, by means of which an expansion anchor can be tensioned on its shaft.
  • the tensioned expansion anchor is inserted headfirst into a hole with an undercut.
  • the expansion sleeve is then moved on the shaft of the expansion anchor in the direction of the expansion head with a spreading device, the expansion anchor is thereby spread and anchored in the borehole.
  • the expansion anchor is held by the tensioning device against the force that the expansion sleeve or the expansion part exerts on the expansion anchor when it is pushed onto the expansion head.
  • the expansion anchor is therefore not pressed into the borehole against the bottom of the borehole.
  • the forces required for spreading are absorbed by the setting tool according to the invention and do not act externally on the workpiece.
  • the setting tool according to the invention has the advantage that, when a spreading anchor is set, it causes a self-contained force curve from the spreading device of the setting tool via the expansion sleeve to the spreading anchor and from there back to the tensioning device of the setting tool.
  • expansion anchors can also be placed in thin workpieces with a small residual wall thickness at the bottom of the borehole.
  • the tensioning device and / or expansion piston are actuated by means of a pressure fluid, preferably with compressed air.
  • the clamping device has a clamping piston which can be pressurized and has a clamping cone.
  • the tensioning piston is provided with a bore with which it is displaceably guided on a collet which serves to tension the shaft of the expansion anchor.
  • the tensioning piston moves, its tensioning cone comes into contact with a cone of the collet and compresses it in the radial direction to tension the shaft of the expansion anchor.
  • the collet is rigidly connected to a housing of the setting tool, it does not move with the clamping piston. To this way, a simply constructed, reliably functioning tensioning device is obtained with only one movable part, the tensioning piston.
  • One embodiment of the invention has an expansion piston which can be pressurized and which displaces the expansion sleeve of the expansion anchor tensioned in the tensioning device in the direction of its expansion head and thereby spreads the expansion anchor.
  • a further development of the invention provides an expansion piston with an axial bore in which the tensioning piston is received. The expanding piston encloses the clamping piston, the two pistons are guided in one another so that they can be displaced in the axial direction. In this way, a compact design of the setting tool according to the invention can be achieved.
  • This embodiment of the invention has the further advantage that the tensioning device and the spreading device act coaxially on the expansion anchor and, as a result, moments when the anchor is spreading neither occur within the setting tool nor on the anchor.
  • the handling of the setting tool according to the invention is facilitated by a pressure relief valve which opens a passage to an expansion piston pressure chamber when a clamping pressure is reached in a clamping piston pressure chamber.
  • the effect of this is that the expansion anchor is first tensioned and then expanded by supplying pressure fluid into the tensioning piston chamber.
  • the setting device according to the invention can be used both as a hand-held device and can be integrated into an automatic setting device for automatically setting expansion anchors.
  • the setting machine is preferably used in a fully automatic drilling system which provides workpieces such as plates or tiles with undercuts with undercuts at predetermined locations. In this way, drilling and setting of expansion anchors are carried out precisely and quickly on one system.
  • the setting tool 10 according to the invention shown in FIG. 1 has a hollow cylinder 12, one end of which is sealed with a cover 14.
  • the cover 14 is screwed to the hollow cylinder 12.
  • Hollow cylinder 12 and cover 14 form a housing of the setting tool 10.
  • a flat stop ring 16 is screwed to the hollow cylinder 12 on an end face opposite the cover 14 and protrudes a little radially inward beyond the hollow cylinder 12.
  • an expanding piston 18 is received so as to be displaceable in the axial direction.
  • Circumferential guide bands 20 are inserted into two flat piston grooves near the two ends of the expansion piston 18.
  • the expansion piston 18 is sealed against the hollow cylinder 12 by means of an O-ring 22 inserted into a piston groove.
  • a circular expansion disk 24 is screwed to the expansion piston 18.
  • the spreading disc 24 is located within the stop ring 16, it has radial play to the stop ring 16.
  • the expansion washer 24 is provided with a hole 26 which allows a shaft 28 of an expansion anchor 30, 32 to be pushed through (two types of expansion anchor 30, 32 are each shown in half in FIG. 1).
  • An expansion sleeve 34 which is displaceable on the shaft 28 of the expansion anchor 30, 32 abuts the expansion disk 24 at one edge of the bore 26.
  • the expansion sleeve 34 serves to spread its one end or a separate expansion part 36 via an expansion cone 38 which is connected to the shaft 28 of the Expansion anchor 30, 32 is in one piece.
  • the expansion piston 18 is provided with an axial bore 39 in which a tensioning piston 40 is received so as to be displaceable in the axial direction.
  • This has a circumferential guide band 42 which is inserted into a flat piston groove near an end face facing the expansion plate 24 and which guides the tensioning piston 40 in the expansion piston 18.
  • the tensioning piston 40 and the expansion piston 18 are sealed against one another by means of an O-ring 44 inserted into a piston groove.
  • the expansion piston 40 is guided in a hollow cylindrical extension 46 which is in one piece with the cover 14 and projects in the axial direction into the hollow cylinder 12 by a little less than half a piston length.
  • a circumferential guide band 48 is inserted into a flat piston groove near an end face of the tensioning piston 40 facing the cover 14.
  • the tensioning piston 40 is sealed against the extension 46 of the cover 14 with an O-ring 50, which is inserted into a piston groove.
  • the bore 39 in the expanding piston 18 is designed as a stepped bore which widens in the direction of the cover 14.
  • the extension 46 has play in the radial direction at least in the radial direction.
  • the tensioning piston 40 has an axial bore 51 which widens to a tensioning cone 52 at one end facing the expansion plate 24.
  • a known collet 54 with a cone 56 is received in the bore 51 of the clamping piston 40.
  • the collet 54 is screwed to an internally threaded screw sleeve 58 which protrudes from the clamping piston 40 at the end on the cover side and projects into a stepped bore of the cover 14.
  • the screw sleeve 58 is screwed to the cover 14 with a screw 60.
  • the collet 54 is rigidly screwed to the cover 14 via the screw sleeve 58.
  • the screw sleeve is sealed against the tensioning piston 40 and the cover 14 with two O-rings 62, 64.
  • the cover 14 delimits a clamping piston pressure chamber 66 in the interior of its hollow cylindrical extension 46, which is closed off by the clamping piston 40.
  • a threaded bore leads as a compressed air connection 68 into the clamping piston pressure chamber 66.
  • a twice angled bore in the cover 14 leads as a fluid or compressed air passage 70 from the clamping piston pressure chamber 66 to an expansion piston pressure chamber 72.
  • the expanding piston pressure chamber 72 is delimited by the hollow cylinder 12, the cover 14, the expanding piston 18 and the circumference of the clamping piston 40.
  • a pressure relief valve 74 with a spring-loaded valve piston 76 is fitted in the compressed air passage 70.
  • the spring tension of a valve spring 78, and thus the opening pressure of the check valve 74, can be adjusted by means of a threaded pin 80.
  • the check valve 74 In its basic position, the check valve 74 is closed and blocks the compressed air passage 70 from the clamping piston pressure chamber 66 to the expanding piston pressure chamber 72.
  • the valve piston 76 is provided with two intersecting transverse bores 82 which open into a piston groove 84. From the intersection of the transverse bores 82, an axial blind bore 86 leads axially to a valve chamber 87 communicating with the surroundings. Via the bores 82, 86 in the valve piston 76 and the compressed air passage 70, the expansion piston pressure chamber 72 communicates with the surroundings, i. H. it is vented.
  • the piston groove 84 of the valve piston 76 causes the transverse bores 82 of the valve piston 76 to communicate with the part of the compressed air passage 70 leading into the expansion piston pressure chamber 72, regardless of the rotational position of the valve piston 76.
  • the setting tool 10 functions as follows: the shaft 28 of an expansion anchor 30, 32 is inserted through the hole 26 of the expansion plate 24 into the collet 54.
  • the clamping piston pressure chamber 66 is pressurized with compressed air through the compressed air connection 68, as a result of which the clamping piston 40 moves in the direction of the expansion plate 24.
  • the clamping cone 52 of the clamping piston 40 slides onto the cone 56 of the collet 54 and presses its clamping jaws radially together, as a result of which the shaft 28 of the expansion anchor 30, 32 is clamped.
  • the valve piston 76 closes the Compressed air passage 70, the collet pressure chamber 66 is hermetically closed.
  • the spring-loaded valve piston 76 releases the compressed air passage 70 so that compressed air flows from the collet pressure chamber 66 into the expanding piston pressure chamber 72.
  • the valve piston 76 blocks its transverse bores 82, so that the expansion piston pressure space 72 is closed off from the surroundings.
  • the compressed air in the expansion piston pressure chamber 72 moves the expansion piston 40 as far as it will go against the stop ring 16.
  • the expansion ring 24 screwed to the expansion piston 40 displaces the expansion sleeve 34 in the direction of the expansion head 38 of the expansion anchor 30, 32.
  • the expansion sleeve 34 itself or the expansion part 36 spread and the expansion anchor 30, 32 anchored in a borehole, not shown, with a conical undercut, for example.
  • the expansion anchor 30, 32 Since the expansion anchor 30, 32 is clamped on its shaft 28 in the collet 54, the expansion anchor 30, 32 is not pressed against a base of the borehole when its expansion sleeve 34 is pushed onto its expansion head 38. The force acting when the expansion sleeve 34 is pushed onto the expansion cone 38 in the longitudinal direction of the expansion anchor 30, 32 is absorbed by the collet 54 of the setting tool 10 according to the invention.
  • the compressed air is released from the tensioning piston pressure chamber 66 through the compressed air connection 68.
  • Helical compression springs 88 which are supported against the expansion plate 24, push the tensioning piston 40 back into an initial position.
  • the collet 54 opens, so that the setting tool 10 according to the invention can be removed from the shaft 28 of the expansion anchor 30, 32.
  • the expansion piston pressure chamber 72 is vented through the pressure relief valve 74 as soon as its valve piston 76 closes the compressed air passage 70 as the pressure in the clamping piston pressure chamber 66 decreases.
  • Helical compression springs 90 which are supported against the stop ring 16, push the tensioning piston 18 back into its starting position.
  • FIG. 2 shows the setting tool 10 according to the invention with a handle 92 screwed into the compressed air connection 68 in the form of a pistol grip, which has a compressed air connection 94.
  • a compressed air valve which can be actuated by means of a finger lever 96 is integrated in the handle 92. When the finger lever 96 is released, the setting tool 10 is vented.
  • FIG. 3 shows the use of the setting device 10 according to the invention in an automatic setting device 100 for setting and anchoring expansion anchors in boreholes.
  • a blind bore 108 in the slide 104 serves to receive an expansion anchor 32.
  • the remaining expansion anchors 32 are retained in the magazine 102 by a pneumatically actuated separating device 110.
  • the setting device 10 is held on the automatic setting machine 100 by means of a rod guide 112 which can be displaced in the vertical direction and can be driven to perform a lifting movement by means of a pneumatic lifting cylinder 114.
  • the setting device 10 is lowered onto the expansion anchor 32 and this is tensioned by supplying compressed air to the compressed air connection 68. Then the setting tool 10 is raised again by the lifting cylinder 114, so that the expansion anchor 32 comes out of the blind bore 108 of the slide 104. The pneumatic cylinder 106 of the slide 104 moves it to the side so that the setting tool 10 can be moved freely downwards.
  • the expansion piston pressure chamber 72 is acted upon by compressed air through a second compressed air connection 116.
  • the second compressed air connection 116 is screwed into the compressed air passage 70 instead of the check valve 74 and closes it in the direction of the tensioning piston pressure chamber 66.
  • both pressure chambers 66, 72 are vented through the compressed air connections 68, 116 and the setting tool 10 from the lifting cylinder 114 in move its starting position back.
  • the separating device 110 releases an expansion anchor 32 from the magazine 102 during the setting, which falls into the blind bore 108 of the slide 104 and is fed to the setting device 10 by moving the slide 104.
  • a height-adjustable stop 118 on the slide 104 limits the depth of the expansion anchor in the setting tool 10 and in this way specifies the displacement of the expansion sleeve 34 on the expansion anchor 32.
  • FIG. 4 shows a section of a system for making undercuts in boreholes in slabs, tiles or the like and for placing expansion anchors in the boreholes.
  • the system 120 has two drilling devices 122 known per se, which are movably attached to a cross member 124.
  • the cross member 124 can in turn be moved on a machine frame 126 of the system 120 transversely to the direction of travel of the drilling devices 122.
  • Workpieces (not shown) can be placed on a work surface 128 of the machine frame 126 under the drilling devices 122.
  • the setting machine 100 with the setting device 10 according to the invention is mounted on the side of a carriage 130, on which the drilling devices 122 are also attached, so that after drilling the boreholes can be moved to the exact position and expansion anchors can be placed in them by means of the setting device 10.
  • the system 120 is preferably operated fully automatically under computer control.

Abstract

The expanding anchor (18,24) is movable in relation to the tensioning appliance (40,54) in the longitudinal direction of an inserted straddling tie-piece (30,32). The anchor moves the expander sleeve (34) which is on the shaft (28) of the tie-piece towards the tie piece head (38) to expand it. The anchor has a collet (54), and a clamping cone (52) movable by a clamping piston (40). The expander sleeve has a piston (18) for moving the expander sleeve towards the tie piece head. An excess pressure valve (74) in a fluid duct (70) leading from a clamping piston pressure chamber (66) to a straddling piston pressure chamber (72) opens the fluid duct when the clamping pressure in the clamping piston pressure chamber is reached.

Description

Die Erfindung betrifft ein Setzgerät zum Setzen eines Spreizankers in ein eine Hinterschneidung aufweisendes Bohrloch.The invention relates to a setting tool for setting an expansion anchor in a hole having an undercut.

Spreizanker weisen einen sich von einem Schaft weg beispielsweise konusförmig erweiternden Spreizkopf auf. Er wird in ein Bohrloch mit einer Hinterschneidung, die beispielsweise die Form eines Hohlkonus aufweist, eingeführt. Durch Verschieben einer Spreizhülse auf dem Schaft des Spreizankers wird entweder die Hülse selbst oder ein Spreizteil auf den Spreizkopf aufgeschoben und dabei aufgespreizt, wodurch der Spreizanker im Bohrloch formschlüssig verankert ist.Expansion anchors have an expansion head that widens, for example, in a conical shape away from a shaft. It is inserted into a borehole with an undercut, which has the shape of a hollow cone, for example. By moving an expansion sleeve on the shaft of the expansion anchor, either the sleeve itself or an expansion part is pushed onto the expansion head and expanded in the process, as a result of which the expansion anchor is positively anchored in the borehole.

Beim Aufschieben der Spreizhülse bzw. des Spreizteils auf den Spreizkopf des Spreizankers wird der Spreizanker in das Bohrloch hineingedrückt, sein Spreizkopf drückt gegen einen Bohrlochgrund. Platten oder Fliesen, in welche ein Spreizanker gesetzt wird, können dadurch am Bohrlochgrund brechen, insbesondere wenn dort die Restwanddicke gering ist.When the expansion sleeve or the expansion part is pushed onto the expansion head of the expansion anchor, the expansion anchor is pressed into the borehole, its expansion head presses against a bottom of the borehole. Slabs or tiles in which an expansion anchor is placed can break at the bottom of the borehole, especially if the remaining wall thickness is small there.

Es ist daher Aufgabe der Erfindung, ein Setzgerät der eingangs genannten Art so auszubilden, daß die beim Setzen eines Spreizankers auf ein Werkstück wirkenden Kräfte, insbesondere am Bohrlochgrund, klein sind, um Beschädigungen des Werkstücks zu vermeiden.It is therefore an object of the invention to design a setting tool of the type mentioned in the introduction such that the forces acting on a workpiece when setting an expansion anchor, in particular at the bottom of the borehole, are small in order to avoid damage to the workpiece.

Diese Aufgabe wird erfindungsgemäß durch die Merkmale des Anspruchs 1 gelöst. Das erfindungsgemäße Setzgerät weist eine Spanneinrichtung auf, mittels derer ein Spreizanker an seinem Schaft spannbar ist. Der gespannte Spreizanker wird mit dem Kopf voran in ein eine Hinterschneidung aufweisendes Bohrloch eingesetzt. Anschließend wird mit einer Spreizeinrichtung die Spreizhülse auf dem Schaft des Spreizankers in Richtung des Spreizkopfes verschoben, der Spreizanker dadurch gespreizt und im Bohrloch verankert. Während des Spreizens wird der Spreizanker von der Spanneinrichtung gegen die Kraft, die die Spreizhülse bzw. das Spreizteil beim Aufschieben auf den Spreizkopf auf den Spreizanker ausübt, gehalten. Der Spreizanker wird also nicht ins Bohrloch hinein gegen den Bohrlochgrund gedrückt. Die zum Spreizen notwendigen Kräfte werden vom erfindungsgemäßen Setzgerät aufgenommen und wirken nicht nach außen auf das Werkstück.This object is achieved by the features of claim 1. The setting tool according to the invention has a tensioning device, by means of which an expansion anchor can be tensioned on its shaft. The tensioned expansion anchor is inserted headfirst into a hole with an undercut. The expansion sleeve is then moved on the shaft of the expansion anchor in the direction of the expansion head with a spreading device, the expansion anchor is thereby spread and anchored in the borehole. During the expansion, the expansion anchor is held by the tensioning device against the force that the expansion sleeve or the expansion part exerts on the expansion anchor when it is pushed onto the expansion head. The expansion anchor is therefore not pressed into the borehole against the bottom of the borehole. The forces required for spreading are absorbed by the setting tool according to the invention and do not act externally on the workpiece.

Das erfindungsgemäße Setzgerät hat den Vorteil, daß es beim Setzen eines Spreizankers einen in sich geschlossenen Kraftverlauf von der Spreizeinrichtung des Setzgeräts über die Spreizhülse auf den Spreizanker und von diesem zurück auf die Spanneinrichtung des Setzgeräts bewirkt. Mittels des erfindungsgemäßen Setzgeräts lassen sich Spreizanker auch in dünne Werkstücke mit geringer Restwanddicke am Bohrlochgrund setzen.The setting tool according to the invention has the advantage that, when a spreading anchor is set, it causes a self-contained force curve from the spreading device of the setting tool via the expansion sleeve to the spreading anchor and from there back to the tensioning device of the setting tool. Using the setting device according to the invention, expansion anchors can also be placed in thin workpieces with a small residual wall thickness at the bottom of the borehole.

Bei einer Ausgestaltung der Erfindung erfolgen die Betätigung von Spanneinrichtung und/oder Spreizkolben mittels eines Druckfluids, vorzugsweise mit Druckluft. Die Spanneinrichtung weist dazu einen druckbeaufschlagbaren Spannkolben mit einem Spannkonus auf. Der Spannkolben ist mit einer Bohrung versehen, mit welcher er auf einer Spannzange verschiebbar geführt ist, welche zum Spannen des Schafts des Spreizankers dient. Bei Druckbeaufschlagung verschiebt sich der Spannkolben, sein Spannkonus gelangt auf einen Konus der Spannzange und drückt diese zum Spannen des Schafts des Spreizankers in radialer Richtung zusammen. Die Spannzange ist starr mit einem Gehäuse des Setzgeräts verbunden, sie bewegt sich nicht mit dem Spannkolben mit. Auf diese Weise erhält man eine einfach aufgebaute, zuverlässig funktionierende Spanneinrichtung mit nur einem beweglichen Teil, dem Spannkolben.In one embodiment of the invention, the tensioning device and / or expansion piston are actuated by means of a pressure fluid, preferably with compressed air. For this purpose, the clamping device has a clamping piston which can be pressurized and has a clamping cone. The tensioning piston is provided with a bore with which it is displaceably guided on a collet which serves to tension the shaft of the expansion anchor. When pressure is applied, the tensioning piston moves, its tensioning cone comes into contact with a cone of the collet and compresses it in the radial direction to tension the shaft of the expansion anchor. The collet is rigidly connected to a housing of the setting tool, it does not move with the clamping piston. To this In this way, a simply constructed, reliably functioning tensioning device is obtained with only one movable part, the tensioning piston.

Eine Ausgestaltung der Erfindung weist einen druckbeaufschlagbaren Spreizkolben auf, der die Spreizhülse des in der Spanneinrichtung gespannten Spreizankers in Richtung auf dessen Spreizkopfs verschiebt und den Spreizanker dadurch aufspreizt. Eine Weiterbildung der Erfindung sieht einen Spreizkolben mit einer axialen Bohrung vor, in welcher der Spannkolben aufgenommen ist. Der Spreizkolben umschließt den Spannkolben, die beiden Kolben sind ineinander in Achsrichtung gegeneinander verschiebbar geführt. Auf diese Weise läßt sich eine kompakte Bauform des erfindungsgemäßen Setzgeräts erreichen. Diese Ausführungsform der Erfindung hat den weitern Vorteil, daß die Spanneinrichtung und die Spreizeinrichtung koaxial auf den Spreizanker wirken und infolgedessen Momente beim Spreizen des Ankers weder innerhalb des Setzgeräts noch am Anker entstehen.One embodiment of the invention has an expansion piston which can be pressurized and which displaces the expansion sleeve of the expansion anchor tensioned in the tensioning device in the direction of its expansion head and thereby spreads the expansion anchor. A further development of the invention provides an expansion piston with an axial bore in which the tensioning piston is received. The expanding piston encloses the clamping piston, the two pistons are guided in one another so that they can be displaced in the axial direction. In this way, a compact design of the setting tool according to the invention can be achieved. This embodiment of the invention has the further advantage that the tensioning device and the spreading device act coaxially on the expansion anchor and, as a result, moments when the anchor is spreading neither occur within the setting tool nor on the anchor.

Die Handhabung des erfindungsgemäßen Setzgeräts wird durch ein Überdruckventil erleichtert, das bei Erreichen eines Spanndrucks in einem Spannkolbendruckraum einen Durchlaß zu einem Spreizkolbendruckraum öffnet. Dadurch wird bewirkt, daß durch Zufuhr von Druckfluid in den Spannkolbenraum zunächst der Spreizanker gespannt und anschließend gespreizt wird.The handling of the setting tool according to the invention is facilitated by a pressure relief valve which opens a passage to an expansion piston pressure chamber when a clamping pressure is reached in a clamping piston pressure chamber. The effect of this is that the expansion anchor is first tensioned and then expanded by supplying pressure fluid into the tensioning piston chamber.

Das erfindungsgemäße Setzgerät läßt sich sowohl als Handgerät verwenden als auch in einen Setzautomaten zum automatischen Setzen von Spreizankern integrieren. Der Setzautomat wird vorzugsweise in einer vollautomatischen Bohranlage verwendet, die Werkstücke wie Platten oder Fliesen mit Hinterschneidungen aufweisenden Bohrlöchern an vorgegebenen Stellen versieht. Auf diese Weise erfolgen Bohren und Setzen von Spreizankern präzise und schnell auf einer Anlage.The setting device according to the invention can be used both as a hand-held device and can be integrated into an automatic setting device for automatically setting expansion anchors. The setting machine is preferably used in a fully automatic drilling system which provides workpieces such as plates or tiles with undercuts with undercuts at predetermined locations. In this way, drilling and setting of expansion anchors are carried out precisely and quickly on one system.

Die Erfindung wird nachfolgend anhand eines in der Zeichnung dargestellten Ausführungsbeispiels näher erläutert. Es zeigen:

Figur 1
einen Achsschnitt durch ein erfindungsgemäßes Setzgerät;
Figur 2
eine perspektivische Darstellung des Setzgeräts aus Figur 1 mit einem daran angebrachten Handgriff;
Figur 3
einen Setzautomaten mit dem Setzgerät aus Figur 1 gemäß der Erfindung; und
Figur 4
das in eine vollautomatische Bohranlage integrierte Setzgerät aus Figur 1.
The invention is explained in more detail below with reference to an embodiment shown in the drawing. Show it:
Figure 1
an axial section through a setting tool according to the invention;
Figure 2
a perspective view of the setting tool of Figure 1 with a handle attached to it;
Figure 3
a setting machine with the setting device of Figure 1 according to the invention; and
Figure 4
the setting tool from FIG. 1 integrated into a fully automatic drilling system.

Das in Figur 1 dargestellte, erfindungsgemäße Setzgerät 10 weist einen Hohlzylinder 12 auf, dessen eine Stirnseite mit einem Deckel 14 dicht verschlossen ist. Der Deckel 14 ist mit dem Hohlzylinder 12 verschraubt. Hohlzylinder 12 und Deckel 14 bilden ein Gehäuse des Setzgeräts 10. Auf einer dem Deckel 14 gegenüberliegenden Stirnseite ist ein flacher Anschlagring 16 mit dem Hohlzylinder 12 verschraubt, der ein Stück radial nach innen über den Hohlzylinder 12 übersteht.The setting tool 10 according to the invention shown in FIG. 1 has a hollow cylinder 12, one end of which is sealed with a cover 14. The cover 14 is screwed to the hollow cylinder 12. Hollow cylinder 12 and cover 14 form a housing of the setting tool 10. A flat stop ring 16 is screwed to the hollow cylinder 12 on an end face opposite the cover 14 and protrudes a little radially inward beyond the hollow cylinder 12.

Im Hohlzylinder 12 ist ein Spreizkolben 18 in axialer Richtung verschiebbar aufgenommen. In zwei flache Kolbennuten nahe den beiden Stirnenden des Spreizkolbens 18 sind umlaufende Führungsbänder 20 eingelegt. Der Spreizkolben 18 ist mittels eines in eine Kolbennut eingelegten O-Rings 22 gegen den Hohlzylinder 12 abgedichtet.In the hollow cylinder 12, an expanding piston 18 is received so as to be displaceable in the axial direction. Circumferential guide bands 20 are inserted into two flat piston grooves near the two ends of the expansion piston 18. The expansion piston 18 is sealed against the hollow cylinder 12 by means of an O-ring 22 inserted into a piston groove.

An seiner dem Anschlagring 16 zugewandten Stirnseite ist eine kreisrunde Spreizscheibe 24 mit dem Spreizkolben 18 verschraubt. Die Spreizscheibe 24 befindet sich innerhalb des Anschlagrings 16, sie weist radiales Spiel zum Anschlagring 16 auf. In ihrer Mitte ist die Spreizscheibe 24 mit einem Loch 26 versehen, das ein Durchstecken eines Schafts 28 eines Spreizankers 30, 32 erlaubt (in Figur 1 sind zwei Spreizankertypen 30, 32 je zur Hälfte dargestellt). Eine auf dem Schaft 28 des Spreizankers 30, 32 verschiebbare Spreizhülse 34 stößt an einem Rand der Bohrung 26 gegen die Spreizscheibe 24. Die Spreizhülse 34 dient zum Aufspreizen ihres einen Endes oder eines separaten Spreizteils 36 über einen Spreizkonus 38, der mit dem Schaft 28 des Spreizankers 30, 32 einstückig ist.On its end face facing the stop ring 16, a circular expansion disk 24 is screwed to the expansion piston 18. The spreading disc 24 is located within the stop ring 16, it has radial play to the stop ring 16. In the middle, the expansion washer 24 is provided with a hole 26 which allows a shaft 28 of an expansion anchor 30, 32 to be pushed through (two types of expansion anchor 30, 32 are each shown in half in FIG. 1). An expansion sleeve 34 which is displaceable on the shaft 28 of the expansion anchor 30, 32 abuts the expansion disk 24 at one edge of the bore 26. The expansion sleeve 34 serves to spread its one end or a separate expansion part 36 via an expansion cone 38 which is connected to the shaft 28 of the Expansion anchor 30, 32 is in one piece.

Der Spreizkolben 18 ist mit einer axialen Bohrung 39 versehen, in der ein Spannkolben 40 in axialer Richtung verschiebbar aufgenommen ist. Dieser weist ein umlaufendes Führungsband 42 auf, das in eine flache Kolbennut nahe einem der Spreizplatte 24 zugewandten Stirnseite eingelegt ist und das den Spannkolben 40 im Spreizkolben 18 führt. Mittels eines in eine Kolbennut eingelegten O-Rings 44 sind der Spannkolben 40 und der Spreizkolben 18 gegeneinander abgedichtet.The expansion piston 18 is provided with an axial bore 39 in which a tensioning piston 40 is received so as to be displaceable in the axial direction. This has a circumferential guide band 42 which is inserted into a flat piston groove near an end face facing the expansion plate 24 and which guides the tensioning piston 40 in the expansion piston 18. The tensioning piston 40 and the expansion piston 18 are sealed against one another by means of an O-ring 44 inserted into a piston groove.

An seinem dem Deckel 14 zugewandten Ende ist der Spreizkolben 40 in einem hohlzylindrischen Fortsatz 46 geführt, der mit dem Deckel 14 einstückig ist und um etwas weniger als eine halbe Kolbenlänge in axialer Richtung in den Hohlzylinder 12 ragt. Zur Führung in dem Fortsatz 46 ist ein umlaufendes Führungsband 48 in eine flache Kolbennut nahe einer dem Deckel 14 zugewandten Stirnseite des Spannkolbens 40 eingelegt. Der Spannkolben 40 ist gegen den Fortsatz 46 des Deckels 14 mit einem O-Ring 50 abgedichtet, der in eine Kolbennut eingelegt ist.At its end facing the cover 14, the expansion piston 40 is guided in a hollow cylindrical extension 46 which is in one piece with the cover 14 and projects in the axial direction into the hollow cylinder 12 by a little less than half a piston length. For guidance in the extension 46, a circumferential guide band 48 is inserted into a flat piston groove near an end face of the tensioning piston 40 facing the cover 14. The tensioning piston 40 is sealed against the extension 46 of the cover 14 with an O-ring 50, which is inserted into a piston groove.

Um Platz für den hohlzylindrischen Fortsatz 46 des Deckels 14 zu schaffen, ist die Bohrung 39 im Spreizkolben 18 als Stufenbohrung ausgeführt, die sich in Richtung des Deckels 14 erweitert. Der Fortsatz 46 weist zumindest in radialer Richtung Spiel zum Spreizkolben 18 auf.In order to make room for the hollow cylindrical extension 46 of the cover 14, the bore 39 in the expanding piston 18 is designed as a stepped bore which widens in the direction of the cover 14. The extension 46 has play in the radial direction at least in the radial direction.

Der Spannkolben 40 weist eine axiale Bohrung 51 auf, die sich an einem der Spreizplatte 24 zugewandten Ende zu einem Spannkonus 52 erweitert. In der Bohrung 51 des Spannkolbens 40 ist eine ansich bekannte Spannzange 54 mit einem Konus 56 aufgenommen. Die Spannzange 54 ist mit einer ein Innengewinde tragenden Schraubhülse 58 verschraubt, die am deckelseitigen Ende aus dem Spannkolben 40 vorsteht und in eine Stufenbohrung des Deckels 14 ragt. Mit einer Schraube 60 ist die Schraubhülse 58 mit dem Deckel 14 verschraubt. Die Spannzange 54 ist über die Schraubhülse 58 starr mit dem Deckel 14 verschraubt. Mit zwei O-Ringen 62, 64 ist die Schraubhülse gegen den Spannkolben 40 und den Deckel 14 abgedichtet.The tensioning piston 40 has an axial bore 51 which widens to a tensioning cone 52 at one end facing the expansion plate 24. A known collet 54 with a cone 56 is received in the bore 51 of the clamping piston 40. The collet 54 is screwed to an internally threaded screw sleeve 58 which protrudes from the clamping piston 40 at the end on the cover side and projects into a stepped bore of the cover 14. The screw sleeve 58 is screwed to the cover 14 with a screw 60. The collet 54 is rigidly screwed to the cover 14 via the screw sleeve 58. The screw sleeve is sealed against the tensioning piston 40 and the cover 14 with two O-rings 62, 64.

Der Deckel 14 begrenzt einen Spannkolbendruckraum 66 im Innern seines hohlzylindrischen Fortsatzes 46, der vom Spannkolben 40 abgeschlossen wird.The cover 14 delimits a clamping piston pressure chamber 66 in the interior of its hollow cylindrical extension 46, which is closed off by the clamping piston 40.

Durch den Deckel 14 führt eine mit einem Gewinde versehene Bohrung als Druckluftanschluß 68 in den Spannkolbendruckraum 66.Through the cover 14, a threaded bore leads as a compressed air connection 68 into the clamping piston pressure chamber 66.

Eine zweifach abgewinkelte Bohrung im Deckel 14 führt als Fluid- bzw. Druckluftdurchlaß 70 vom Spannkolbendruckraum 66 zu einem Spreizkolbendruckraum 72. Der Spreizkolbendruckraum 72 wird vom Hohlzylinder 12, vom Deckel 14, vom Spreizkolben 18 und vom Umfang des Spannkolbens 40 begrenzt.A twice angled bore in the cover 14 leads as a fluid or compressed air passage 70 from the clamping piston pressure chamber 66 to an expansion piston pressure chamber 72. The expanding piston pressure chamber 72 is delimited by the hollow cylinder 12, the cover 14, the expanding piston 18 and the circumference of the clamping piston 40.

Im Druckluftdurchlaß 70 ist ein Überdruckventil 74 mit einem federbelasteten Ventilkolben 76 angebracht. Die Federspannung einer Ventilfeder 78, und damit der Öffnungsdruck des Rückschlagventils 74, ist mittels eines Gewindestifts 80 einstellbar. In seiner Grundstellung ist das Rückschlagventil 74 geschlossen und sperrt den Druckluftdurchlaß 70 vom Spannkolbendruckraum 66 zum Spreizkolbendruckraum 72.A pressure relief valve 74 with a spring-loaded valve piston 76 is fitted in the compressed air passage 70. The spring tension of a valve spring 78, and thus the opening pressure of the check valve 74, can be adjusted by means of a threaded pin 80. In its basic position, the check valve 74 is closed and blocks the compressed air passage 70 from the clamping piston pressure chamber 66 to the expanding piston pressure chamber 72.

Der Ventilkolben 76 ist mit zwei einander kreuzenden Querbohrungen 82 versehen, die in eine Kolbennut 84 münden. Vom Kreuzungspunkt der Querbohrungen 82 führt eine axiale Sackbohrung 86 axial zu einem mit der Umgebung kommunizierenden Ventilraum 87. Über die Bohrungen 82, 86 im Ventilkolben 76 und den Druckluftdurchlaß 70 kommuniziert der Spreizkolbendruckraum 72 mit der Umgebung, d. h. er ist entlüftet. Die Kolbennut 84 des Ventilkolbens 76 bewirkt, daß die Querbohrungen 82 des Ventilkolbens 76 unabhängig von der Drehstellung des Ventilkolbens 76 mit dem in den Spreizkolbendruckraum 72 führenden Teil des Druckluftdurchlasses 70 kommunizieren.The valve piston 76 is provided with two intersecting transverse bores 82 which open into a piston groove 84. From the intersection of the transverse bores 82, an axial blind bore 86 leads axially to a valve chamber 87 communicating with the surroundings. Via the bores 82, 86 in the valve piston 76 and the compressed air passage 70, the expansion piston pressure chamber 72 communicates with the surroundings, i. H. it is vented. The piston groove 84 of the valve piston 76 causes the transverse bores 82 of the valve piston 76 to communicate with the part of the compressed air passage 70 leading into the expansion piston pressure chamber 72, regardless of the rotational position of the valve piston 76.

Das erfindungsgemäße Setzgerät 10 funktioniert wie folgt: Der Schaft 28 eines Spreizankers 30, 32 wird durch das Loch 26 der Spreizplatte 24 in die Spannzange 54 eingeführt. Der Spannkolbendruckraum 66 wird durch den Druckluftanschluß 68 mit Druckluft beaufschlagt, wodurch sich der Spannkolben 40 in Richtung der Spreizplatte 24 bewegt. Der Spannkonus 52 des Spannkolbens 40 gleitet auf den Konus 56 der Spannzange 54 auf und drückt deren Spannbacken radial zusammen, wodurch der Schaft 28 des Spreizankers 30, 32 gespannt wird. Dabei verschließt der Ventilkolben 76 den Druckluftdurchlaß 70, der Spannzangendruckraum 66 ist hermetisch geschlossen.The setting tool 10 according to the invention functions as follows: the shaft 28 of an expansion anchor 30, 32 is inserted through the hole 26 of the expansion plate 24 into the collet 54. The clamping piston pressure chamber 66 is pressurized with compressed air through the compressed air connection 68, as a result of which the clamping piston 40 moves in the direction of the expansion plate 24. The clamping cone 52 of the clamping piston 40 slides onto the cone 56 of the collet 54 and presses its clamping jaws radially together, as a result of which the shaft 28 of the expansion anchor 30, 32 is clamped. The valve piston 76 closes the Compressed air passage 70, the collet pressure chamber 66 is hermetically closed.

Sobald der Druck im Spannzangendruckraum 66 einen mit dem Gewindestift 80 des Rückschlagventils 74 einstellbaren Spanndruck erreicht und überschreitet, gibt der federbelastete Ventilkolben 76 den Druckluftdurchlaß 70 frei, so daß Druckluft vom Spannzangendruckraum 66 in den Spreizkolbendruckraum 72 überströmt. Zugleich sperrt der Ventilkolben 76 seine Querbohrungen 82, so daß der Spreizkolbendruckraum 72 von der Umgebung abgeschlossen ist. Die Druckluft im Spreizkolbendruckraum 72 bewegt den Spreizkolben 40 bis zum Anschlag am Anschlagring 16. Dabei verschiebt der mit dem Spreizkolben 40 verschraubte Spreizring 24 die Spreizhülse 34 in Richtung des Spreizkopfes 38 des Spreizankers 30, 32. Dadurch wird die Spreizhülse 34 selbst bzw. das Spreizteil 36 aufgespreizt und der Spreizanker 30, 32 in einem nicht dargestellten Bohrloch mit einer beispielsweise konischen Hinterschneidung verankert.As soon as the pressure in the collet pressure chamber 66 reaches and exceeds a clamping pressure that can be set with the threaded pin 80 of the check valve 74, the spring-loaded valve piston 76 releases the compressed air passage 70 so that compressed air flows from the collet pressure chamber 66 into the expanding piston pressure chamber 72. At the same time, the valve piston 76 blocks its transverse bores 82, so that the expansion piston pressure space 72 is closed off from the surroundings. The compressed air in the expansion piston pressure chamber 72 moves the expansion piston 40 as far as it will go against the stop ring 16. The expansion ring 24 screwed to the expansion piston 40 displaces the expansion sleeve 34 in the direction of the expansion head 38 of the expansion anchor 30, 32. As a result, the expansion sleeve 34 itself or the expansion part 36 spread and the expansion anchor 30, 32 anchored in a borehole, not shown, with a conical undercut, for example.

Da der Spreizanker 30, 32 an seinem Schaft 28 in der Spannzange 54 gespannt ist, wird der Spreizanker 30, 32 beim Aufschieben seiner Spreizhülse 34 auf seinen Spreizkopf 38 nicht gegen einen Bohrlochgrund gedrückt. Die beim Aufschieben der Spreizhülse 34 auf den Spreizkonus 38 in Längsrichtung des Spreizankers 30, 32 wirkende Kraft wird von der Spannzange 54 des erfindungsgemäßen Setzgeräts 10 aufgenommen.Since the expansion anchor 30, 32 is clamped on its shaft 28 in the collet 54, the expansion anchor 30, 32 is not pressed against a base of the borehole when its expansion sleeve 34 is pushed onto its expansion head 38. The force acting when the expansion sleeve 34 is pushed onto the expansion cone 38 in the longitudinal direction of the expansion anchor 30, 32 is absorbed by the collet 54 of the setting tool 10 according to the invention.

Nachdem der Spreizanker 30, 32 gesetzt ist, wird die Druckluft durch den Druckluftanschluß 68 aus dem Spannkolbendruckraum 66 entlassen. Schraubendruckfedern 88, die sich gegen die Spreizplatte 24 abstützen, drücken den Spannkolben 40 in eine Ausgangsstellung zurück. Die Spannzange 54 öffnet sich dabei, so daß das erfindungsgemäße Setzgerät 10 vom Schaft 28 des Spreizankers 30, 32 abgenommen werden kann.After the expansion anchor 30, 32 is set, the compressed air is released from the tensioning piston pressure chamber 66 through the compressed air connection 68. Helical compression springs 88, which are supported against the expansion plate 24, push the tensioning piston 40 back into an initial position. The collet 54 opens, so that the setting tool 10 according to the invention can be removed from the shaft 28 of the expansion anchor 30, 32.

Der Spreizkolbendruckraum 72 wird durch das Überdruckventil 74 entlüftet, sobald dessen Ventilkolben 76 den Druckluftdurchlaß 70 bei nachlassendem Druck im Spannkolbendruckraum 66 verschließt. Schraubendruckfedern 90, die sich gegen den Anschlagring 16 abstützen, drücken den Spannkolben 18 in seine Ausgangsstellung zurück.The expansion piston pressure chamber 72 is vented through the pressure relief valve 74 as soon as its valve piston 76 closes the compressed air passage 70 as the pressure in the clamping piston pressure chamber 66 decreases. Helical compression springs 90, which are supported against the stop ring 16, push the tensioning piston 18 back into its starting position.

In Figur 2 ist das erfindungsgemäße Setzgerät 10 mit einem in den Druckluftanschluß 68 eingeschraubten Handgriff 92 in Form eines Pistolengriffs dargestellt, der einen Druckluftanschluß 94 aufweist. In den Handgriff 92 ist ein mittels eines Fingerhebels 96 betätigbares Druckluftventil integriert. Bei gelöstem Fingerhebel 96 ist das Setzgerät 10 entlüftet.FIG. 2 shows the setting tool 10 according to the invention with a handle 92 screwed into the compressed air connection 68 in the form of a pistol grip, which has a compressed air connection 94. A compressed air valve which can be actuated by means of a finger lever 96 is integrated in the handle 92. When the finger lever 96 is released, the setting tool 10 is vented.

Figur 3 zeigt die Verwendung des erfindungsgemäßen Setzgeräts 10 in einem Setzautomaten 100 zum Setzen und Verankern von Spreizankern in Bohrlöchern. Seitlich neben dem Setzgerät 10 ist ein Magazin 102 in Form eines stehenden Rohres angeordnet, das Spreizanker 32 enthält. Unter einer Mündung des Magazins 102 befindet sich ein Schieber 104, der von einem Pneumatikzylinder 106 betätigbar ist. Eine Sackbohrung 108 im Schieber 104 dient zur Aufnahme eines Spreizankers 32. Die übrigen Spreizanker 32 werden von einer pneumatisch betätigten Vereinzelungseinrichtung 110 im Magazin 102 zurückgehalten.FIG. 3 shows the use of the setting device 10 according to the invention in an automatic setting device 100 for setting and anchoring expansion anchors in boreholes. A magazine 102 in the form of a standing tube, which contains expansion anchors 32, is arranged to the side of the setting tool 10. Under a mouth of the magazine 102 there is a slide 104 which can be actuated by a pneumatic cylinder 106. A blind bore 108 in the slide 104 serves to receive an expansion anchor 32. The remaining expansion anchors 32 are retained in the magazine 102 by a pneumatically actuated separating device 110.

Das Setzgerät 10 ist mittels einer Stangenführung 112 in vertikaler Richtung verschiebbar am Setzautomaten 100 gehalten und mittels eines pneumatischen Hubzylinders 114 zu einer Hubbewegung antreibbar.The setting device 10 is held on the automatic setting machine 100 by means of a rod guide 112 which can be displaced in the vertical direction and can be driven to perform a lifting movement by means of a pneumatic lifting cylinder 114.

Mittels des Hubzylinders 114 wird das Setzgerät 10 auf den Spreizanker 32 abgesenkt und dieser durch Druckluftzufuhr am Druckluftanschluß 68 gespannt. Anschließend wird das Setzgerät 10 vom Hubzylinder 114 wieder angehoben, so daß der Spreizanker 32 aus der Sackbohrung 108 des Schiebers 104 herausgelangt. Der Pneumatikzylinder 106 des Schiebers 104 bewegt diesen zur Seite, so daß das Setzgerät 10 frei nach unten verfahren werden kann.By means of the lifting cylinder 114, the setting device 10 is lowered onto the expansion anchor 32 and this is tensioned by supplying compressed air to the compressed air connection 68. Then the setting tool 10 is raised again by the lifting cylinder 114, so that the expansion anchor 32 comes out of the blind bore 108 of the slide 104. The pneumatic cylinder 106 of the slide 104 moves it to the side so that the setting tool 10 can be moved freely downwards.

Zum Spreizen des Spreizankers 32 wird der Spreizkolbendruckraum 72 durch einen zweiten Druckluftanschluß 116 mit Druckluft beaufschlagt. Der zweite Druckluftanschluß 116 ist anstelle des Rückschlagventils 74 in den Druckluftdurchlaß 70 eingeschraubt und verschließt diesen in Richtung des Spannkolbendruckraums 66. Nach dem Setzen des Spreizankers 32 werden beide Druckräume 66, 72 durch die Druckluftanschlüsse 68, 116 entlüftet und das Setzgerät 10 vom Hubzylinder 114 in seine Ausgangsstellung zurück verfahren.To expand the expansion anchor 32, the expansion piston pressure chamber 72 is acted upon by compressed air through a second compressed air connection 116. The second compressed air connection 116 is screwed into the compressed air passage 70 instead of the check valve 74 and closes it in the direction of the tensioning piston pressure chamber 66. After the expansion anchor 32 has been set, both pressure chambers 66, 72 are vented through the compressed air connections 68, 116 and the setting tool 10 from the lifting cylinder 114 in move its starting position back.

Die Vereinzelungseinrichtung 110 gibt während des Setzens einen Spreizanker 32 aus dem Magazin 102 frei, der in die Sackbohrung 108 des Schiebers 104 fällt und durch Verschieben des Schiebers 104 dem Setzgerät 10 zugeführt wird. Ein höheneinstellbarer Anschlag 118 auf dem Schieber 104 begrenzt die Spanntiefe des Spreizankers im Setzgerät 10 und gibt auf diese Weise den Verschiebeweg der Spreizhülse 34 auf dem Spreizanker 32 vor.The separating device 110 releases an expansion anchor 32 from the magazine 102 during the setting, which falls into the blind bore 108 of the slide 104 and is fed to the setting device 10 by moving the slide 104. A height-adjustable stop 118 on the slide 104 limits the depth of the expansion anchor in the setting tool 10 and in this way specifies the displacement of the expansion sleeve 34 on the expansion anchor 32.

Figur 4 zeigt einen Ausschnitt aus einer Anlage zum Anbringen von Hinterschneidungen aufweisenden Bohrlöchern in Platten, Fliesen oder dgl. und zum Setzen von Spreizankern in die Bohrlöcher. Die Anlage 120 weist zwei ansich bekannte Bohrvorrichtungen 122 auf, die an einer Traverse 124 verfahrbar angebracht sind. Die Traverse 124 ist ihrerseits an einem Maschinengestell 126 der Anlage 120 quer zur Verfahrrichtung der Bohrvorrichtungen 122 verfahrbar. Nicht dargestellte Werkstücke lassen sich auf eine Arbeitsfläche 128 des Maschinengestells 126 unter den Bohrvorrichtungen 122 ablegen. An einem Schlitten 130, an welchem auch die Bohrvorrichtungen 122 angebracht sind, ist der Setzautomat 100 mit dem erfindungsgemäßen Setzgerät 10 seitlich angebracht, so daß nach dem Bohren die Bohrlöcher positionsgenau angefahren und Spreizanker mittels des Setzgeräts 10 in sie gesetzt werden können. Die Anlage 120 wird vorzugsweise vollautomatisch computergesteuert betrieben.FIG. 4 shows a section of a system for making undercuts in boreholes in slabs, tiles or the like and for placing expansion anchors in the boreholes. The system 120 has two drilling devices 122 known per se, which are movably attached to a cross member 124. The cross member 124 can in turn be moved on a machine frame 126 of the system 120 transversely to the direction of travel of the drilling devices 122. Workpieces (not shown) can be placed on a work surface 128 of the machine frame 126 under the drilling devices 122. The setting machine 100 with the setting device 10 according to the invention is mounted on the side of a carriage 130, on which the drilling devices 122 are also attached, so that after drilling the boreholes can be moved to the exact position and expansion anchors can be placed in them by means of the setting device 10. The system 120 is preferably operated fully automatically under computer control.

Claims (9)

Setzgerät (10) für einen Spreizanker (30, 32), mit einer Spanneinrichtung (40, 54) zum Spannen eines Schafts (28) des Spreizankers (30, 32) und mit einer in Bezug auf die Spanneinrichtung (40, 54) in Längsrichtung eines eingespannten Spreizankers (30, 32) bewegbaren Spreizeinrichtung (18, 24) zum Verschieben einer auf dem Schaft (28) des Spreizankers (30, 32) befindlichen Spreizhülse (34) in Richtung eines Spreizkopfs (38) des Spreizankers (30, 32), um den Spreizanker (30, 32) aufzuspreizen.Setting tool (10) for an expansion anchor (30, 32), with a tensioning device (40, 54) for tensioning a shaft (28) of the expansion anchor (30, 32) and with one in relation to the tensioning device (40, 54) in the longitudinal direction of a clamped expansion anchor (30, 32) movable expansion device (18, 24) for displacing an expansion sleeve (34) located on the shaft (28) of the expansion anchor (30, 32) in the direction of an expansion head (38) of the expansion anchor (30, 32) to spread the expansion anchor (30, 32). Setzgerät nach Anspruch 1, dadurch gekennzeichnet, daß die Spanneinrichtung (40) eine Spannzange (54) aufweist.Setting tool according to claim 1, characterized in that the clamping device (40) has a collet (54). Setzgerät nach Anspruch 2, dadurch gekennzeichnet, daß die Spanneinrichtung (40) einen Spannkonus (52) aufweist, der zum Spannen auf einen Konus (56) der Spannzange (54) aufschiebbar ist.Setting tool according to claim 2, characterized in that the clamping device (40) has a clamping cone (52) which can be pushed onto a cone (56) of the collet (54) for clamping. Setzgerät nach Anspruch 3, dadurch gekennzeichnet, daß die Spanneinrichtung einen auf einem Schaft der Spannzange (54) verschiebbar geführten, druckbeaufschlagbaren Spannkolben (40) aufweist, der den Spannkonus (52) verschiebt.Setting tool according to Claim 3, characterized in that the clamping device has a clamping piston (40) which can be moved on a shaft of the collet (54) and which can be pressurized and which displaces the clamping cone (52). Setzgerät nach Anspruch 1, dadurch gekennzeichnet, daß die Spreizeinrichtung einen druckbeaufschlagbaren Spreizkolben (18) zum Verschieben der Spreizhülse (34) in Richtung des Spreizkopfs (38) des Spreizankers (30, 32) aufweist.Setting tool according to Claim 1, characterized in that the spreading device has a spreading piston (18) which can be pressurized to move the spreading sleeve (34) in the direction of the spreading head (38) of the spreading anchor (30, 32). Setzgerät nach Anspruch 5, dadurch gekennzeichnet, daß der Spreizkolben (18) eine Bohrung aufweist, in welcher der Spannkolben (40) aufgenommen ist.Setting tool according to claim 5, characterized in that the expanding piston (18) has a bore in which the clamping piston (40) is received. Setzgerät nach Anspruch 1, dadurch gekennzeichnet, daß es ein Überdruckventil (74) in einem Fluiddurchlaß (70), der von einem Spannkolbendruckraum (66) zu einem Spreizkolbendruckraum (72) führt, aufweist, das den Fluiddurchlaß (70) bei Erreichen eines Spanndrucks im Spannkolbendruckraum (66) öffnet.Setting tool according to claim 1, characterized in that it has a pressure relief valve (74) in a fluid passage (70), which leads from a tensioning piston pressure chamber (66) to an expansion piston pressure chamber (72), which the fluid passage (70) upon reaching a clamping pressure in the The clamping piston pressure chamber (66) opens. Setzgerät anch Anspruch 7, dadurch gekennzeichnet, daß das Überdruckventil (74) in seiner Grundstellung den Spreizkolbendruckraum (72) entlüftet.Setting tool according to claim 7, characterized in that the pressure relief valve (74) in its basic position vents the expansion piston pressure chamber (72). Setzautomat zum Setzen von Spreizankern mit einem Setzgerät nach Anspruch 1, dadurch gekennzeichnet, daß er eine Hubeinrichtung (112, 114) für das Setzgerät (10) und eine Vereinzelungs- und Zuführeinrichtung (104, 106, 110) zur Entnahme eines Spreizankers (32) aus einem Magazin (102) und zur Zuführung zum Setzgerät (10) aufweist.Setting machine for setting expansion anchors with a setting device according to claim 1, characterized in that it has a lifting device (112, 114) for the setting device (10) and a separating and feeding device (104, 106, 110) for removing an expansion anchor (32) from a magazine (102) and for feeding to the setting tool (10).
EP96108549A 1995-07-06 1996-05-29 Setting tool for anchor bolts Expired - Lifetime EP0752296B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19524610 1995-07-06
DE19524610A DE19524610A1 (en) 1995-07-06 1995-07-06 Setting tool for an expansion anchor

Publications (2)

Publication Number Publication Date
EP0752296A1 true EP0752296A1 (en) 1997-01-08
EP0752296B1 EP0752296B1 (en) 1999-04-07

Family

ID=7766148

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96108549A Expired - Lifetime EP0752296B1 (en) 1995-07-06 1996-05-29 Setting tool for anchor bolts

Country Status (7)

Country Link
US (1) US5743130A (en)
EP (1) EP0752296B1 (en)
JP (1) JP2971398B2 (en)
AT (1) ATE178521T1 (en)
BR (1) BR9602982A (en)
DE (2) DE19524610A1 (en)
ES (1) ES2132807T3 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018193671A (en) * 2017-05-12 2018-12-06 株式会社テクト Post-installed anchor driving device and method of anchor construction

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2562419A (en) * 1948-04-05 1951-07-31 George L Ferris Expansion nut setting tool
US3462988A (en) * 1968-02-21 1969-08-26 Robert H Tudor Anchor setting tool
FR2255814A5 (en) * 1971-09-17 1975-07-18 Langensiepen Kg M Wall plug insertion device - rotates plug in hole to mix retaining glue and has quick release mechanism
US4627140A (en) * 1985-04-01 1986-12-09 Drillco Devices Limited Anchor bolt setting impact tool
EP0372196A2 (en) * 1988-12-05 1990-06-13 fischerwerke Artur Fischer GmbH & Co. KG Fastening system
EP0427664A2 (en) * 1989-11-10 1991-05-15 HILTI Aktiengesellschaft Device for placing dowels

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4736430U (en) * 1971-05-08 1972-12-22
US3838588A (en) * 1971-05-14 1974-10-01 A Johnson Apparatus for setting unthreaded pull rivets
JPS506392A (en) * 1973-05-15 1975-01-23
DE2935964A1 (en) * 1979-09-06 1981-04-02 Dr.h.c. Artur 7244 Waldachtal Fischer Anchoring bolt fixing tool - has shank with axial bearing holding expandable sleeve as bolt cone is pulled into sleeve by thread
US4248077A (en) * 1979-11-26 1981-02-03 Gregory Jack T Jaw for riveter
US4309138A (en) * 1980-02-08 1982-01-05 Jarman Davis R Floor anchor
US4314784A (en) * 1980-05-22 1982-02-09 The United States Of America As Represented By The Secretary Of The Navy Seafloor attachment bolts
JPH0249872B2 (en) * 1984-03-30 1990-10-31 Ogura Kk ANKAABORUTOMEKOMIKOTEIYOJIGU
US4630510A (en) * 1984-05-10 1986-12-23 Monogram Industries, Inc. Tactile engaging wrenching mechanism
US4604889A (en) * 1984-12-27 1986-08-12 Huck Manufacturing Company Automated installation tool for blind fasteners
JPS63144132U (en) * 1987-03-10 1988-09-22
US4852376A (en) * 1987-10-05 1989-08-01 Huck Manufacturing Company Lockbolt installation tool with cartridge feed
US5035353A (en) * 1989-12-01 1991-07-30 Emhart Inc. Automatic riveting machine
US5136873A (en) * 1991-11-13 1992-08-11 S.A.R.G. Research Assoc, Ltd. Automatic blind rivet setting device
DE4215008C1 (en) * 1992-05-06 1993-11-11 Sfs Stadler Holding Ag Heerbru Device for setting a self-drilling clamp fastener
US5371933A (en) * 1994-04-05 1994-12-13 Gbp Corporation Fastener setting tool with offset nose assembly
DE29500115U1 (en) * 1995-01-05 1995-02-23 Bbc Reaktor Gmbh Clamping element for fixing in a hole in a component

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2562419A (en) * 1948-04-05 1951-07-31 George L Ferris Expansion nut setting tool
US3462988A (en) * 1968-02-21 1969-08-26 Robert H Tudor Anchor setting tool
FR2255814A5 (en) * 1971-09-17 1975-07-18 Langensiepen Kg M Wall plug insertion device - rotates plug in hole to mix retaining glue and has quick release mechanism
US4627140A (en) * 1985-04-01 1986-12-09 Drillco Devices Limited Anchor bolt setting impact tool
EP0372196A2 (en) * 1988-12-05 1990-06-13 fischerwerke Artur Fischer GmbH & Co. KG Fastening system
EP0427664A2 (en) * 1989-11-10 1991-05-15 HILTI Aktiengesellschaft Device for placing dowels

Also Published As

Publication number Publication date
JPH0929662A (en) 1997-02-04
BR9602982A (en) 1998-04-28
DE19524610A1 (en) 1997-01-09
DE59601584D1 (en) 1999-05-12
ES2132807T3 (en) 1999-08-16
ATE178521T1 (en) 1999-04-15
EP0752296B1 (en) 1999-04-07
US5743130A (en) 1998-04-28
JP2971398B2 (en) 1999-11-02

Similar Documents

Publication Publication Date Title
DE2907913A1 (en) HAND DRILLING MACHINE
DE3819813A1 (en) POWDER POWERED SETTING DEVICE
EP0623065B1 (en) Profiled clamping jaw and process for clamping workpieces
EP0326639A2 (en) Control valve device for a pneumatically operated fastener driving tool
DE4239180A1 (en) Clamp for contoured workpieces - is based on jaw block with clamping surface formed by rods pushed back against springs and locked when jaw is forced against work
EP0899061A2 (en) Clamping jaws and device for clamping workpieces
DE4014616A1 (en) Vice to hold irregular articles for milling - has separate independent radial hydraulically operated jaws
DE3833511C2 (en)
DE2117833B2 (en) BLANKING TOOL
EP0785049B1 (en) Support table with clamping device
DE2529873B2 (en) POWERED DRIVING TOOL FOR FASTENERS
EP0752296B1 (en) Setting tool for anchor bolts
DE102019104836A1 (en) Clamping device for a machine tool, in particular a machining center
DE3602542A1 (en) Device for driving dowels into dowel holes of workpieces
DE3228321A1 (en) Improved riveting machine
DE2558662C3 (en) Hydraulic clamping device
DE4042364A1 (en) Chuck securing irregular work - has hydraulic rams supplied by common pressurised reservoir and shut off individually
DE3625753A1 (en) CLAMPING DEVICE
WO1994022641A1 (en) Compliant jaw for a clamping device
DE4326674C2 (en) Jaw unit
DE2516157A1 (en) Compressed air operated nail or dowel driver - dowels forced from horizontal chamber under handle towards piston
DE1402258C (en) Driving point for lathes etc.
DE2227065C3 (en) Device for deburring or countersinking the edges of through holes
DE3941800C2 (en) Device for gripping workpieces
DE2420895A1 (en) DEVICE FOR CUTTING BARS

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LI NL PT

17P Request for examination filed

Effective date: 19970614

17Q First examination report despatched

Effective date: 19980213

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LI NL PT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990407

REF Corresponds to:

Ref document number: 178521

Country of ref document: AT

Date of ref document: 19990415

Kind code of ref document: T

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

ET Fr: translation filed
REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: GERMAN

REF Corresponds to:

Ref document number: 59601584

Country of ref document: DE

Date of ref document: 19990512

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19990707

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19990707

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19990709

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2132807

Country of ref document: ES

Kind code of ref document: T3

BERE Be: lapsed

Owner name: FISCHERWERKE ARTUR FISCHER G.M.B.H. & CO. K.G.

Effective date: 19990531

REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20000518

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20000524

Year of fee payment: 5

Ref country code: ES

Payment date: 20000524

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20000529

Year of fee payment: 5

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000531

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000531

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20000531

Year of fee payment: 5

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010529

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010529

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010530

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20011201

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20010529

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020131

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20011201

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20020308

Year of fee payment: 7

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20030203

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20031202

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050529