EP0047930A2 - Device for the withdrawal of tapelike material - Google Patents

Abstract

1. Device for the withdrawal of sections (8) of a tapelike material, particularly paper, wound up on rollers (1, 14) in which the section (8) of the desired length may be unwound from a roller by pulling by hand and may be removed by a knife (5) arranged substantially parallel to the roller axis (2), including a replacement roller (14) which is arranged above the first roller, a blocking device for the replacement roller (14), a housing for covering the rollers (1, 14) in whose side walls are formed vertical guides (9) for accommodating shaft ends (4) extending out of both end faces of the rollers and inclined tracks (3) adjacent thereto in the form of rigid grooves or slots which are open on both sides, characterised in that an upwardly open step-like broadening of the guide (9) is provided and the shaft ends (4) extending out of both end faces of the replacement roller (14) are so constructed as a rectangle that only the smaller edge can slide through the vertical guides (9).

Description

The invention relates to a device for removing sections of a web-shaped material, in particular paper, wound on a roll, the section being able to be unwound from the roll by pulling by hand and detachable by a knife arranged essentially parallel to the roll axis.

Devices of this type known hitherto are usually equipped with mechanisms which make it possible for the drawn-out paper web to stop automatically, for it to be cut off automatically or for the new beginning of paper to be pushed out automatically. Because of these mechanisms, the known devices have a relatively complicated structure, therefore require a large production outlay and are also prone to failure.

From DE-OS 29 31 053 a dispenser for sheet material is known, which comprises a housing to be opened in its upper section, into which several rolls of the material can be inserted, the housing having lateral guides in which the roller axes are guided. The known device has a discharge opening for the sheet-like material and at least one second opening for removing holders for the rolls. In the operation of this known device, the weight of all the replacement rollers is loaded on the dispenser roller, as a result of which the tensile force for unwinding material from the dispenser roller is relatively high. This creates the risk that the paper web will unintentionally tear off during unwinding. In addition, there is a risk that if the dispenser roll has become relatively small, this roll will jam in the opening for removing the roll holder.

The object of the present invention is to create a generic device which is simple in construction and accordingly inexpensive to manufacture and which is also easy to use and has a high level of operational reliability.

According to the invention this object is achieved in that in a generic device from both end faces of the roller projecting axle ends are provided with which the roller is slidably guided on rails strongly inclined to the horizontal and the knife is mounted transversely to the rails so that the roller due to its own weight component in the direction of the rails on a flat side of the knife.

The device according to the invention solves the problems in an outstanding manner by only two has simple sliding guides for the axle ends of the roller and a knife aligned transversely thereto. It should be emphasized as particularly advantageous that the roller is always pressed against the flat side of the knife only with its own weight component, so that the tangential pulling out of a section of web-shaped material counteracts only a low frictional force and nevertheless enables the section to be easily separated in that it is bent over the cutting edge of the knife and is cut off. The risk of unintentional tearing of the material web when pulling out can no longer occur because the retention force is very low. Depending on the tensile strength of the sheet-like material, this retention force can be adjusted by making the inclination of the rails larger or smaller. As a result, a larger or smaller component of the weight of the roll is transferred as a contact pressure to the flat side of the knife.

A further embodiment of the invention is that vertically extending guides for receiving the axle ends of a replacement roller are provided above the inclined rails, which open onto the inclined rails, means being provided with which the replacement roller can be blocked at a distance above the roller. With this arrangement, the possibility of accommodating a replacement roll is not bought with the fact that other disadvantages, such as excessive contact pressure and thus the risk of the material web being torn off unintentionally, occur. Only when the means for blocking the replacement roll are removed does it replace the donor roll.

In a further embodiment of the invention, a housing for covering the roller (s) is provided, which has an opening on its underside for loading the device is provided with new roles. Although the device does not require a housing per se, it has been shown that protection of the rollers by means of a housing cover is particularly advantageous when the material rolls are paper rolls. Due to the design of the removal device according to the invention, the housing can also very much. be simply formed by only having an opening on its underside for loading the device with new rollers.

Another advantageous embodiment of the invention, which consists in that the inclined rails and / or the vertical guides are formed as grooves or slots in the side walls of the housing, also serves a particularly simple construction which is favorable in terms of production technology. This can be a housing to be loaded from below or from above, or from the front.

The further training indicated in claims 5 to 7 relate to various means for blocking the replacement role.

The housing preferably consists at least to the extent that it is made of transparent material so that the degree of material consumption and the presence of a replacement roller can be seen from the outside. In this way, the user of the device can recognize that he has to put the replacement roll into operation when the dispenser roll is empty.

In the claims 9 and 10, advantageous designs of a housing for only one role are shown.

• Fig. 1 eine Rolle mit bahnförmigem Material, wie sie bei einer erfindungsgemäßen Vorrichtung zur Anwendung kommt,
• Fig. 2 die wesentlichen Teile einer erfindungsgemäßen Vorrichtung,
• Fig. 3 eine betriebsfähige Vorrichtung ohne Gehäuse,
• Fig. 4 eine Seitenansicht der Vorrichtung geme^p Pfeil 4 in Fig. 3 beim Herausziehen eines Abschnitts,
• Fig. 5 eine Darstellung entsprechend Fig. 4 beim Abtrennen eines Abschnitts,
• Fig. 6 eine erfindungsgemäße Vorrichtung mit Ersatzrolle,
• Fig. 7 eine Vorrichtung aus Fig. 3, jedoch mit Gehäuse,
• Fig. 8 eine Vorrichtung aus Fig. 6, jedoch mit Gehäuse,
• Fig. 9 eine Blockiereinrichtung für eine Ersatzrolle bei einer Vorrichtung gemäß Fig. 6 oder Fig. 8 verriegelt,
• Fig. 10 die Einrichtung gemäß Fig. 9 entriegelt,
• Fig. 11 eine weitere Blockiereinrichtung für eine Ersatzrolle verriegelt,
• Fig. 12 die Einrichtung gemäß Fig. 11 entriegelt,
• Fig. 13 eine dritte Ausführungsform einer Blockiereinrichtung verriegelt,
• Fig. 14 die Blockiereinrichtung gemäß Fig. 13 entriegelt,
• Fig. 15 eine Vorrichtung gemäß Fig. 4 angebracht an einer Haltewand,
• Fig. 16 und Fig. 17 Trennmesser für erfindunggemäße Vorrichtungen,
• Fig. 18 eine erfindungsgemäße Vorrichtung mit zylindrischem Gehäuse für eine Rolle im Schnitt,
• Fig. 19 eine erfindungsgemäße Vorrichtung mit frontseitig beladbarem Gehäuse für zwei Rollen im Schnitt.

Exemplary embodiments of a device according to the invention are explained with the aid of the attached schematic drawings. In the drawings:

• 1 is a roll with web-like material as used in a device according to the invention,
• 2 shows the essential parts of a device according to the invention,
• 3 shows an operational device without a housing,
• Fig. 4 is a side view of the device geme ^p arrow 4 in Fig. 3 when pulling out a portion,
• 5 shows a representation corresponding to FIG. 4 when a section is cut off, FIG.
• 6 shows a device according to the invention with a replacement roller,
• 7 shows a device from FIG. 3, but with a housing,
• 8 shows a device from FIG. 6, but with a housing,
• 9 locks a blocking device for a replacement roller in a device according to FIG. 6 or FIG. 8,
• 10 unlocks the device according to FIG. 9,
• 11 locks a further blocking device for a replacement roll,
• 12 unlocks the device according to FIG. 11,
• 13 locks a third embodiment of a blocking device,
• 14 unlocks the blocking device according to FIG. 13,
• 15 shows a device according to FIG. 4 attached to a holding wall,
• 16 and FIG. 17 cutting knife for devices according to the invention,
• 18 shows a device according to the invention with a cylindrical housing for a roll in section,
• Fig. 19 shows a device according to the invention with a front loadable housing for two roles in section.

In Fig. 1 a paper roll 1 is shown in the oblique image, which is loosely on an axis 2. The axis ends 4 of the axis 2 protrude on both faces of the paper roll 1.

In Fig. 2, the essential parts of the device according to the invention are shown in the oblique view. These comprise two rails 3, which are inclined strongly, preferably by 45 ^* , relative to the horizontal, on which the paper roll 1 according to FIG. 1 can be placed with its axis ends 4. Due to the inclination of the rails 3, the paper roll 1 slides down until it is stopped by a knife 5 arranged transversely to the rails 3. The knife 5 is attached so that the sliding paper roll 1 rests with its own weight component in the direction of the rails 3 on the flat side of the knife 5. The cutting direction of the knife 5 is indicated by the arrow 6 in FIG. 2. FIG. 3 shows the paper roll 1 resting on the rails 3 and supported on the flat side of the knife 5. In FIG. 4 a section 8 is unwound from the roll 1 by tangential pulling at the end of the paper web. 5, the section 8 is separated from the roll 1 in that the section 8 is moved backwards over the after cutting edge of the knife 5 directed below is then pulled off. After a section 8 has been cut off, the roll 1 must be turned further by hand until a new end 7 of the paper web protrudes over the cutting edge of the knife 5 and can then be gripped by hand.

FIG. 6 shows an embodiment of a device according to the invention, in which a replacement roller 14 is provided in addition to a dispenser roller 1. The spare roller 14 is held with its axis ends 4 in vertically extending guides 9 which open onto the inclined rails 3. The replacement roller 14 can be blocked with suitable blocking devices at a distance above the roller 1.

Such blocking devices are shown in FIGS. 9 to 14. A first type of blocking device consists in the fact that locking pins 15 are inserted into the vertical guides 9 and prevent the axle ends 4 of the respective replacement roller 14 from sliding down. To unlock the replacement roller, the locking pins 15 are only pulled out by hand so far that the axle ends 4 can slide down in the vertical guides 9.

A second type of blocking device is illustrated in FIGS. 11 and 12. In this device, the vertical guides 9 are provided with an upwardly opening step-like extension 17 and the axis ends of the roller 1, which are denoted by 16 in this exemplary embodiment, have a rectangular cross section, the rectangular edges being chosen such that only the smaller edge can slide through the vertical guides 9. Accordingly, the axis of the roller 1 is rotated so that the large rectangular edge of the rectangular axis ends 16 is horizontal, as shown in Fig. 11, he there is a blockage of the roller in the extension 17 of the guides 9. A solution to this blockage is achieved in that the axis of the roller 1 is rotated by 90 °, so that the smaller edge is horizontal and thus the rectangular axis end 16 through the vertical Guide 9 can slide through (see Fig. 12).

In the third, in FIGS. 13 and 14 illustrated blocking device is a simple buckling of the vertical guides 9 in the region of its upper end by at least 90 °, in the illustrated embodiment a Knickun ^g is chosen to about 150. This results in an offset 18 of the vertical guides 9, in which the axle ends 4 rest. To remove the blockage, the roller 1 can be lifted slightly so that the axle ends 4 move out of the bent portion 18 into the vertical guide 9.

7 shows a side view of a device according to the invention, which has a housing 10 for covering the roll. The housing 10 has essentially the shape of a cylindrical half-shell and is held with its rear wall 12 on a fastening wall. The housing 10 is in one piece and has an opening on its underside for introducing the roller. The device shown in FIG. 8 is one with a replacement roller, so that a housing 11 covers both the replacement roller and the dispenser roller. The rear wall of the housing 11 is designated 13.

15 shows a device according to the invention without a housing and its attachment to a holding wall. From this representation it can be seen that only the inclined rails 3 have to be fastened with their rear end to the holding wall. In the embodiment according to 15, the cutting edge of the knife 5 is directed upwards, so that a section 8 must be pulled out of the roll 1 upwards.

16 shows a knife with a straight cutting edge, and FIG. 17 shows a knife with a toothed cutting edge.

The embodiment of a device according to the invention shown in FIG. 18 has an essentially cylindrical two-part housing for receiving only one material roll 1. The roll of material is shown in dash-dot lines. The housing is divided in a horizontal plane passing through the cylinder axis, so that there is a lower housing part and a bowl-shaped cover 24 covering this at the top. The lower housing part essentially consists of a rectangular frame 21 which lies approximately in the partial plane of the housing and consists of two semicircular side walls 22 extending downward from opposite sides of the frame 21. The inclined rails 3 are arranged on the side walls 22, preferably connected integrally therewith. The knife 5 connects the two side walls 22 like a web.

19 shows an embodiment of a device according to the invention with a housing for two rolls of material, the housing being loadable through an opening on the front. The opening can be closed with a hinged cover 38. In the cross-sectional view according to FIG. 19, the hinged lid 38 is in the closed state. The vertical guides 9 in the side walls 32 of the housing are angled at their upper end towards the front of the housing and come out of the side walls there the 32 out. The axis ends 4 of a replacement roller can be threaded into these openings 39 of the guides 9 when the hinged cover 38 is open. By closing the hinged lid 38, the mouths 39 are closed, and at the same time the inserted replacement roller 14 (shown in broken lines) is pushed back so that the axle ends 4 slide up to the vertical section of the guides 9, from where the replacement roller 14 through it own gravity moves down. In this embodiment too, means for blocking the replacement roller can be provided in the vertical guides 9, as shown in detail in FIGS. 9 to 14 and described above.

Claims (13)

1. Device for removing sections of a web-shaped material, in particular paper, wound on a roll, the section being able to be unwound from the roll by pulling by hand and detachable by a knife arranged essentially parallel to the roll axis, characterized in that from both end faces of the roller (1) projecting axle ends (4) are provided, with which the roller (1) is slidably guided on rails (3) strongly inclined to the horizontal and the knife (5) transversely to the rails (3) it is appropriate that the roller (1) lies against a flat side of the knife (5) due to its own weight component in the direction of the rails (3). 2. Device according to claim 1, characterized in that above the inclined rails (3) vertically extending guides (9) for receiving the axle ends (4) of a replacement roller (14) are provided, which open onto the inclined rails (3), wherein Means are provided with which the replacement roller (14) can be blocked at a distance above the roller (1). 3. Device according to claim 1 or 2, characterized in that a housing (10) for covering the roller (s) (1, 14) is provided, which is provided on its underside with an opening for loading the device with new rollers. 4. The device according to claim 3, characterized in that the inclined rails (3) and / or the vertical guides (9) are designed as slots in the side walls of the housing (10). 5. Device according to claims 2 to 4, characterized in that the means for blocking the replacement roller (14) in the vertical guides (9) are insertable locking pins (15). 6. Device according to claims 2 to 4, characterized in that the means for blocking the replacement roller (14) comprises an upwardly opening step-like extension of the guides (9) and rectangular axis ends (4), the rectangular edges of which are selected so that only the smaller edge can slide through the vertical guides (9). 7. Device according to claims 2 to 4, characterized in that the means for blocking the Er set roller (14) include a kink of the vertical guides (9) in the region of their upper end by at least 90 ^* . 8. Device according to claims 3 to 7, characterized in that the housing (10) consists at least to the extent of transparent material that the degree of consumption of material and the presence of a spare role can be seen from the outside. 9. Device according to claims 1, 3, 4 or 8, characterized in that it is designed as a substantially cylindrical in a plane passing through the cylinder axis plane housing for receiving a material roll (1) with a lower housing part, which consists essentially of a right-angled frame (21) and two semi-circular side walls (22) extending downward from opposite sides of the frame (21), on which the inclined rails (3) are arranged and between which the knife (5) is attached in a web-like manner and with an upper housing part in the form of a semi-cylindrical shell-shaped cover (24) which can be placed on the rectangular frame. 10. The device according to claim 9, characterized in that the cover 24 and the lower housing part including the knife (5) are each one-piece components made of plastic. 11. The device according to claim 1 or claim 2, characterized in that a housing (11) for covering the roller (s) (1, 14) is provided, in the side walls (32) of the inclined rails (3) and / or vertical guides (9) are designed as grooves or slots. 12. The apparatus according to claim 11, characterized in that the vertical guides (9) are angled at their upper end approximately at right angles to the front of the housing and exit there from the side walls (32). 13. The apparatus according to claim 12, characterized in that a loading opening for replacement rollers is provided in the front of the housing, which can be closed with a hinged cover (38) which covers the mouths (39) of the guides (9) in the closed state.

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