EP1299194B1 - Spray gun - Google Patents

Spray gun Download PDF

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Publication number
EP1299194B1
EP1299194B1 EP01962787A EP01962787A EP1299194B1 EP 1299194 B1 EP1299194 B1 EP 1299194B1 EP 01962787 A EP01962787 A EP 01962787A EP 01962787 A EP01962787 A EP 01962787A EP 1299194 B1 EP1299194 B1 EP 1299194B1
Authority
EP
European Patent Office
Prior art keywords
pressure
spray gun
gun body
compressed air
gun
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.)
Expired - Lifetime
Application number
EP01962787A
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German (de)
French (fr)
Other versions
EP1299194A1 (en
Inventor
Ewald Schmon
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.)
SATA GmbH and Co KG
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SATA GmbH and Co KG
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Publication date
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Publication of EP1299194A1 publication Critical patent/EP1299194A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/004—Arrangements for controlling delivery; Arrangements for controlling the spray area comprising sensors for monitoring the delivery, e.g. by displaying the sensed value or generating an alarm
    • B05B12/006—Pressure or flow rate sensors
    • B05B12/008—Pressure or flow rate sensors integrated in or attached to a discharge apparatus, e.g. a spray gun
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
    • B05B7/2402—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device
    • B05B7/2478—Gun with a container which, in normal use, is located above the gun
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S239/00—Fluid sprinkling, spraying, and diffusing
    • Y10S239/14—Paint sprayers

Definitions

  • the invention relates to a spray gun according to the preamble of claim 1.
  • a spray gun is made US 5 191 797 A known.
  • an injection pressure may e.g. to color changes in the basecoat, to an increase in the orange peel structure in the clear coat and varnish and to reduce the operating speed and possibly the beam width.
  • too low an injection pressure may e.g. to color changes in the basecoat, to an increase in the orange peel structure in the clear coat and varnish and to reduce the operating speed and possibly the beam width.
  • too high an injection pressure can lead to excessive atomization of the spray material and thus lead to greater losses and undesirable stress on the working environment.
  • the available pressure should be monitored, e.g. to detect a possible pressure drop due to additional consumers in the compressed air line network or a pressure increase due to the addition of resources.
  • a pressure control valve with pressure gauge On the pressure gauge can be read via a knob on the pressure control valve adjustable pressure.
  • this arranged at the air inlet of the paint spray gun pressure control valve with pressure gauge leads to an extension of the spray gun, whereby their handiness is deteriorated.
  • the pressure gauge or the pressure regulating valve due to the inner deflections leads to a pressure drop.
  • the usually screwed pressure control valve must be dismantled for cleaning the spray gun in washing or cleaning basins, since the accuracy of the manometer can be affected by penetrating solvent or paint or paint residues.
  • the pressure control valve with the pressure gauge must therefore be unscrewed during each cleaning process, which is associated with a considerable amount of work.
  • paint spray guns which have at the handle bottom a connection for coupling a conventional manometer.
  • the pressure gauges commonly used have as a pressure transducer usually a semicircular or helically bent steel tube spring, whose conditional by the pressure change in shape is indicated by a pointer on a corresponding dial.
  • the steel tube spring and the display device are housed in a separate housing.
  • the handling of the spray gun is affected by the coupled manometer.
  • the manometers must also be removable for cleaning the paint spray gun, so that relatively complicated coupling or connection systems for the connection of the manometer to the spray gun are required.
  • the pressure measuring device is installed in a separate closed housing, which is used with all the components arranged therein in a provided on the top of the gun body receiving bore.
  • This housing includes an opening communicating with a compressed air passage downstream of the air valve. In this arrangement, however, only the gun internal pressure after the valve assembly and not the gun input pressure can be determined.
  • a pressure measuring device in which a capillary tube is provided between a pressure sensor and a connector.
  • the capillary tube is intended to prevent rapid pressure changes or pressure surges from acting on the pressure sensor abruptly, thereby falsifying the measurement result.
  • the object of the invention is to provide a handy spray gun that allows detection of the gun input pressure and is protected against contamination of the sensitive pressure measuring device.
  • the gun body includes a provided in his handle pressure sensing space for the pressure transducer.
  • a capillary is provided between the compressed air supply passage and the pressure sensing space, the capillary being disposed in a communication passage between the pressure sensing space and a portion of the compressed air supply passage located upstream of the valve assembly.
  • the display device and a possible circuit arrangement for signal conversion and evaluation e.g. integrated into the handle of the spray gun.
  • the entire measuring device is housed within the gun body and there optimally protected against damage.
  • the display device which can be embodied as an analogue or digital display can be arranged on a rear end part of the gun body in such a way that the display field can be read from the rear. This results in the advantage that the pressure indication during spraying is always in the field of vision.
  • the spray gun shown in Fig. 1 includes a gun body 1 with a handle 2 and an upper part 3, on which a suspension hook 4 is formed. Through the upper part 3 extends from the front to the rear continuous and multi-stepped through hole 5, in which a nozzle needle 6 is guided axially displaceable.
  • the through hole 5 forms in a front region an enlarged receiving space 7, in which an oblique inlet bore 8 opens to the attachment of a color receiving container, not shown.
  • a nozzle assembly 9 is mounted, which contains a fixable by means of a thread on the upper part 3 of the gun body 1 paint nozzle 10.
  • the paint nozzle 10 has at its front end a nozzle bore 11 which, together with a tapered front end portion of an actuating lever 12 axially movable nozzle needle 6 an adjustable inlet for the paint, the paint or the like.
  • the actuating lever 12 is connected to the nozzle needle 6 in such a way that, upon retraction of the actuating lever 12, it is displaced against the force of a spring 13 towards the rear and opens the nozzle bore 11 for dispensing the ink.
  • the bias of the compression spring 13 and the stroke of the nozzle needle 6 are adjustable.
  • the actuating lever 12 is also a recognizable in Fig. 4 valve assembly 17 with a rear adjusting device 18 for controlling the compressed air supply to the nozzle assembly 9 via a rod 16 operable.
  • the nozzle assembly 9 and its structure is already known as such.
  • a possible nozzle arrangement is eg in the EP 0710 506 A1 disclosed.
  • the spray gun includes an integrated into the handle 2 of the gun body 1 pressure measuring device 27, which consists essentially of a pressure transducer 28, a circuit arrangement 29 and a display device 30.
  • the e.g. designed as a piezoelectric pressure sensor pressure sensor 28 is inserted into a laterally provided in the handle 2 blind hole 31, which defines a pressure sensing space 33 with an upper measuring surface 32.
  • the pressure transducer 28 is connected via electrical connections 34 to the circuit arrangement 29, which consists essentially of a arranged in a corresponding receiving space 35 in the pistol grip 2 board with the corresponding circuit.
  • the circuit 29 is the e.g. arranged as LCD display display device 30 for the display of the detected by the pressure transducer 28 pressure.
  • the circuit arrangement 29 and the display device 30 are held in the pistol grip 2 via an intermediate element 36 by a cover plate 38 provided with a viewing window 37.
  • the final with the side surface of the pistol grip 2 cover plate 38 is sealed to prevent fluid and dirt entry by sealing elements 39 screwed to the pistol grip 2.
  • On the side opposite to the display device 30 side of the handle 2 a closable by a cover 40 receiving compartment 41 is provided for a battery 42 for the electrical supply of the evaluation circuit and display device.
  • the pressure sensing space 33 is connected by a connecting channel 44 provided with a capillary 43 to the upstream portion of the valve assembly 19 of the compressed air supply passage in the area of the gun inlet.
  • the capillary is designed as a bore with a diameter of 0.5 to 1.8 mm.
  • the connecting channel 44 is in the form of a means of a ball 45 closed to the outside lateral connecting hole.
  • Solvent and possibly dissolved paint particles get into the pressure detection chamber and there lead to an impairment of the accuracy or even prevent a measurement.
  • FIGS. 4 to 6 differs from the embodiment described above in that the capillary 43 is arranged in a connecting channel 46 which lies between the pressure-sensing chamber 33 and a part 20 of the compressed-air supply channel arranged downstream of the valve arrangement 17 , Thereby, the set by the adjusting device 18 and available for spraying air pressure can be detected and displayed.
  • a further adjusting device 47 is shown with a lateral knob 48 for regulating the supply of compressed air to the bores 23.
  • the further construction of the spray gun corresponds to the embodiment shown in FIGS. 1 to 3.
  • the pressure sensor 28 is arranged in a separate receiving chamber 49 above the circuit arrangement 29, the display device 30 and the receiving compartment 41 for the battery 42. Otherwise, the spray gun is essentially constructed as in the previously described embodiment according to FIGS. 4 to 6. Also in this embodiment, the adjusted by the actuator 18 working pressure can be detected and displayed.
  • FIGS. 10 and 11 show a further embodiment of a spray gun.
  • the gun body 1 has a rear end piece 50 which is either integral with the. Upper part 3 or as e.g. can be executed screwed or plug-in end part.
  • a receiving chamber 51 is provided with a pressure-sensing space 52 for the pressure transducer 28.
  • the pressure detection room. 52 is connected via a arranged in the axial direction of the end capillary 53 to the compressed air supply channel upstream of the valve assembly 17.
  • a digital display device 54 is arranged with a display panel 55 such that it is visible from behind when working with the spray gun. The pressure can thus be constantly monitored during spraying.
  • the invention is not limited to the embodiments described above and shown in the drawing.
  • piezoelectric pressure transducer instead of piezoelectric pressure transducer Other suitable pressure transducers or pressure sensors are used.
  • the pressure transducers can also be attached to other suitable locations of the PistoIen stressess.

Description

Die Erfindung betrifft eine Spritzpistole nach dem Oberbegriff des Anspruchs 1. Eine derartige Spritzpistole ist aus US 5 191 797 A bekannt.The invention relates to a spray gun according to the preamble of claim 1. Such a spray gun is made US 5 191 797 A known.

Beim Arbeiten mit einer Spritzpistole ist es äußerst wichtig, den Spritzdruck derart einzustellen, daß sich eine optimale Zerstäubung für ein optimales Arbeitsergebnis bei guter Arbeitsgeschwindigkeit und hohem Auftragswirkungsgrad ergibt. Ein zu niedriger Spritzdruck kann z.B. zu Farbtonveränderungen im Basislack, zu einer Erhöhung der Orangenhautstruktur im Klarlack und Unilack und zu einer Reduzierung der Arbeitsgeschwindigkeit sowie eventuell der Strahlbreite führen. Auf der anderen Seite kann ein zu hoher Spritzdruck eine zu große Vernebelung des Spritzmaterials zu Folge haben und damit zu größeren Verlusten und unerwünschter Belastung der Arbeitsumgebung führen. Auch während des Spritzvorgangs sollte der zur Verfügung stehende Druck überwacht werden, um so z.B. einen möglichen Druckabfall durch zusätzliche Verbraucher im Druckluftleitungsnetz oder einen Druckanstieg durch Zuschalten von Ressourcen zu erkennen.When working with a spray gun, it is extremely important to adjust the spray pressure so that optimum atomization results for an optimal work result with good working speed and high application efficiency. Too low an injection pressure may e.g. to color changes in the basecoat, to an increase in the orange peel structure in the clear coat and varnish and to reduce the operating speed and possibly the beam width. On the other hand, too high an injection pressure can lead to excessive atomization of the spray material and thus lead to greater losses and undesirable stress on the working environment. Also during the injection process, the available pressure should be monitored, e.g. to detect a possible pressure drop due to additional consumers in the compressed air line network or a pressure increase due to the addition of resources.

Zur Einstellung und Überwachung des Spritzdrucks wird der Spritzpistole daher vielfach ein Druckregelventil mit Manometer vorgeschaltet. An dem Manometer kann der über einen Stellknopf am Druckregelventil einstellbare Druck abgelesen werden. Dieses am Lufteingang der Farbspritzpistole angeordnete Druckregelventil mit Manometer führt jedoch zu einer Verlängerung der Spritzpistole, wodurch deren Handlichkeit verschlechtert wird. Außerdem führt das Manometer bzw. das Druckregelventil infolge der inneren Umlenkungen zu einem Druckabfall. Darüber hinaus muß das in der Regel angeschraubte Druckregelventil zum Reinigen der Spritzpistole in Waschgeräten oder Reinigungsbecken abgebaut werden, da die Anzeigegenauigkeit des Manometers durch eindringendes Lösungsmittel oder Lack- bzw. Farbreste beeinträchtigt werden kann. Das Druckregelventil mit dem Manometer muß daher bei jedem Reinigungsvorgang abgeschraubt werden, was mit einem erheblichen Arbeitsaufwand verbunden ist.To set and monitor the spray pressure of the spray gun is therefore often preceded by a pressure control valve with pressure gauge. On the pressure gauge can be read via a knob on the pressure control valve adjustable pressure. However, this arranged at the air inlet of the paint spray gun pressure control valve with pressure gauge leads to an extension of the spray gun, whereby their handiness is deteriorated. In addition, the pressure gauge or the pressure regulating valve due to the inner deflections leads to a pressure drop. In addition, the usually screwed pressure control valve must be dismantled for cleaning the spray gun in washing or cleaning basins, since the accuracy of the manometer can be affected by penetrating solvent or paint or paint residues. The pressure control valve with the pressure gauge must therefore be unscrewed during each cleaning process, which is associated with a considerable amount of work.

Es sind auch bereits Farbspritzpistolen bekannt, die an der Griffunterseite einen Anschluß zum Ankuppeln eines konventionellen Manometers aufweisen. Die üblicherweise verwendeten Manometer weisen als Druckaufnehmer in der Regel eine halbkreis- oder wendelförmig gebogene Stahlrohrfeder auf, deren durch den Druck bedingte Formänderung über einen Zeiger auf einem entsprechenden Ziffernblatt angezeigt wird. Die Stahlrohrfeder und die Anzeigeeinrichtung sind in einem gesonderten Gehäuse untergebracht. Auch bei dieser Ausführung wird jedoch die Handhabung der Spritzpistole durch das angekuppelte Manometer beeinträchtigt. Die Manometer müssen darüber hinaus zur Reinigung der Farbspritzpistole abnehmbar sein, so daß relativ aufwendige Kupplungs- oder Verbindungsysteme für den Anschluß des Manometers an die Spritzpistole erforderlich sind.There are already known paint spray guns, which have at the handle bottom a connection for coupling a conventional manometer. The pressure gauges commonly used have as a pressure transducer usually a semicircular or helically bent steel tube spring, whose conditional by the pressure change in shape is indicated by a pointer on a corresponding dial. The steel tube spring and the display device are housed in a separate housing. However, in this embodiment, the handling of the spray gun is affected by the coupled manometer. The manometers must also be removable for cleaning the paint spray gun, so that relatively complicated coupling or connection systems for the connection of the manometer to the spray gun are required.

Es wurde auch bereits vorgeschlagen, an einer Seite des Pistolenkörpers ein konventionelles Manometer anzubringen. Auch eine derartige Spritzpistole weist durch das seitlich vorstehende Manometer eine schlechtere Handlichkeit auf. Außerdem muß eine solche Spritzpistole mit äußerster Sorgfalt behandelt werden, damit das seitlich angebrachte Manometer beim Ablegen der Spritzpistole nicht beschädigt wird.It has also been proposed to attach a conventional pressure gauge to one side of the gun body. Even such a spray gun has by the laterally projecting pressure gauge on a poorer manageability. In addition, such a spray gun must be treated with the utmost care, so that the side-mounted pressure gauge is not damaged when placing the spray gun.

Bei der aus US 5 191 797 bekannten Spritzpistole ist die Druckmesseinrichtung in ein gesondertes geschlossenes Gehäuse eingebaut, das mit sämtlichen darin angeordneten Komponenten in eine auf der Oberseite des Pistolenkörpers vorgesehene Aufnahmebohrung eingesetzt wird. Dieses Gehäuse enthält eine Öffnung, die mit einem Druckluftkanal stromabwärts des Luftventils in Verbindung steht. Bei dieser Anordnung kann jedoch nur der Pistoleninnendruck nach der Ventilanordnung und nicht der Pistoleneingangsdruck ermittelt werden.At the US 5,191,797 known spray gun, the pressure measuring device is installed in a separate closed housing, which is used with all the components arranged therein in a provided on the top of the gun body receiving bore. This housing includes an opening communicating with a compressed air passage downstream of the air valve. In this arrangement, however, only the gun internal pressure after the valve assembly and not the gun input pressure can be determined.

Aus der JP 56054328 ist eine Druckmesseinrichtung bekannt, bei der zwischen einem Drucksensor einem Verbinder ein Kapillarrohr vorgesehen ist. Das Kapillarrohr soll verhindern, dass schnelle Druckänderungen oder Druckstöße unvermittelt auf den Drucksensor einwirken können und dadurch das Messergebnis verfälschen.From the JP 56054328 a pressure measuring device is known in which a capillary tube is provided between a pressure sensor and a connector. The capillary tube is intended to prevent rapid pressure changes or pressure surges from acting on the pressure sensor abruptly, thereby falsifying the measurement result.

Aufgabe der Erfindung ist es, eine handliche Spritzpistole zu schaffen, die eine Erfassung des Pistoleneingangsdrucks ermöglicht und gegen Verschmutzung der empfindlichen Druckmesseinrichtung geschützt ist.The object of the invention is to provide a handy spray gun that allows detection of the gun input pressure and is protected against contamination of the sensitive pressure measuring device.

Diese Aufgabe wird erfindungsgemäß durch eine Spritzpistole mit den Merkmalen des Anspruchs 1 gelöst.This object is achieved by a spray gun with the features of claim 1.

Bei der erfindungsgemäßen Spritzpistole enthält der Pistolenkörper einen in seinem Handgriff vorgesehenen Druckerfassungsraum für den Druckaufnehmer. Zwischen dem Druckluftzufuhrkanal und dem Druckerfassungsraum ist eine Kapillare vorgesehen, wobei die Kapillare in einem Verbindungskanal zwischen dem Druckerfassungsraum und einem stromaufwärts der Ventilanordnung gelegenen Teil des Druckluftzufuhrkanals angeordnet ist. Durch diese Kapillare kann verhindert werden, daß die zur Reinigung der Spritzpistole verwendeten Lösemittel, Lack- oder Farbreste in den Bereich des Druckaufnehmers gelangen und damit eine ordnungsgemäße Druckmessung beeinträchtigen oder verhindern. Die erfindungsgemäße Farbspritzpistole kann so ohne Demontage der Meßeinrichtung gereinigt werden, wobei keine Gefahr für den im Allgemeinen empfindlichen Druckaufnehmer besteht.In the spray gun according to the invention, the gun body includes a provided in his handle pressure sensing space for the pressure transducer. A capillary is provided between the compressed air supply passage and the pressure sensing space, the capillary being disposed in a communication passage between the pressure sensing space and a portion of the compressed air supply passage located upstream of the valve assembly. By means of this capillary, it is possible to prevent the solvents, paint or ink residues used for cleaning the spray gun from reaching the area of the pressure transducer and thus impairing or preventing proper pressure measurement. The paint spray gun according to the invention can be cleaned without disassembly of the measuring device, with no danger to the generally sensitive pressure transducer.

Vorteilhafte Ausführungsformen und zweckmäßige Weiterbildungen der Erfindung sind in den Unteransprüchen angegeben.Advantageous embodiments and expedient developments of the invention are specified in the subclaims.

So ist in einer besonders zweckmäßigen Ausführung auch die Anzeigeeinrichtung und eine eventuelle Schaltungsanordnung zur Signalwandlung und -auswertung z.B. in den Handgriff der Spritzpistole integriert. Dadurch ist die gesamte Messeinrichtung innerhalb des Pistolenkörpers untergebracht und dort vor Beschädigungen optimal geschützt.Thus, in a particularly expedient embodiment, the display device and a possible circuit arrangement for signal conversion and evaluation, e.g. integrated into the handle of the spray gun. As a result, the entire measuring device is housed within the gun body and there optimally protected against damage.

Die als Analog- oder Digitalanzeige ausführbare Anzeigeeinrichtung kann aber auf einem hinteren Endteil des Pistolenköpers derart angeordnet sein, dass das Anzeigefeld von hinten ablesbar ist. Dadurch ergibt sich der Vorteil, dass die Druckanzeige beim Spritzen immer im Blickfeld ist.However, the display device which can be embodied as an analogue or digital display can be arranged on a rear end part of the gun body in such a way that the display field can be read from the rear. This results in the advantage that the pressure indication during spraying is always in the field of vision.

Weitere Besonderheiten und Vorzüge der Erfindung ergeben sich aus der folgenden Beschreibung vorteilhafter Ausführungsbeispiele anhand der Zeichnung. Es zeigen:

Fig.1
eine zum Teil geschnittene Seitenansicht eines Ausführungsbeispiels einer Spritzpistole;
Fig. 2
eine vergrößerte Schnittansicht entlang der Linie C-C von Fig. 1;
Fig. 3
eine vergrößerte Schnittansicht entlang der Linie B-B von Fig. 1;
Fig.4
eine zum Teil geschnittene Seitenansicht einer nicht beanspruchten Ausführung einer Spritzpistole;
Fig. 5
eine vergrößerte Schnittansicht entlang der Linie C-C von Fig. 4;
Fig. 6
eine vergrößerte Schnittansicht entlang der Linie B-B von Fig. 4;
Fig.7
eine zum Teil geschnittene Seitenansicht einer ebenfalls nicht beanspruchten weiteren Spritzpistole;
Fig. 8
eine vergrößerte Schnittansicht entlang der Linie C-C von Fig. 7;
Fig. 9
eine vergrößerte Schnittansicht entlang der Linie B-B von Fig. 7;
Fig. 10
eine zum Teil geschnittene Seitenansicht einer weiteren Spritzpistole und
Fig. 11
eine Rückansicht der Spritzpistole von Fig. 10.
Other features and advantages of the invention will become apparent from the following description of advantageous embodiments with reference to the drawings. Show it:
Fig.1
a partially sectioned side view of an embodiment of a spray gun;
Fig. 2
an enlarged sectional view taken along the line CC of Fig. 1;
Fig. 3
an enlarged sectional view taken along the line BB of Fig. 1;
Figure 4
a partially sectioned side view of an unclaimed embodiment of a spray gun;
Fig. 5
an enlarged sectional view taken along the line CC of Fig. 4;
Fig. 6
an enlarged sectional view taken along the line BB of Fig. 4;
7 shows
a partially sectioned side view of another not claimed further spray gun;
Fig. 8
an enlarged sectional view taken along the line CC of Fig. 7;
Fig. 9
an enlarged sectional view taken along the line BB of Fig. 7;
Fig. 10
a partially sectioned side view of another spray gun and
Fig. 11
a rear view of the spray gun of Fig. 10.

Die in Fig. 1 dargestellte Spritzpistole enthält einen Pistolenkörper 1 mit einem Handgriff 2 und einem Oberteil 3, an dem ein Aufhängehaken 4 angeformt ist. Durch das Oberteil 3 verläuft eine von vorne nach hinten durchgehende und mehrfach abgestufte Durchgangsbohrung 5, in der eine Düsennadel 6 axial verschiebbar geführt ist. Die Durchgangsbohrung 5 bildet in einem vorderen Bereich einen erweiterten Aufnahmeraum 7, in den eine schräge Zulaufbohrung 8 zum Aufsatz eines nicht dargestellten Farbaufnahmebehälters mündet. An dem vorderen Ende der Durchgangsbohrung 5 ist eine Düsenanordnung 9 montiert, die eine mittels eines Gewindes am Oberteil 3 des Pistolenkörpers 1 fixierbare Farbdüse 10 enthält. Die Farbdüse 10 weist an ihrem vorderen Ende eine Düsenbohrung 11 auf, die zusammen mit einem spitz zulaufenden vorderen Endteil der über einen Betätigungshebel 12 axial bewegbaren Düsennadel 6 einen regulierbaren Zulauf für die Farbe, den Lack oder dgl. bildet. Der Betätigungshebel 12 ist derart mit der Düsennadel 6 verbunden, dass diese beim Zurückziehen des Betätigungshebels 12 entgegen der Kraft einer Feder 13 nach hinten verschoben wird und die Düsenbohrung 11 zur Abgabe der Farbe öffnet. Über eine am hinteren Ende der Durchgangsbohrung 5 angeordnete Stellschraube 14 mit entsprechender Kontermutter 15 sind die Vorspannung der Druckfeder 13 und der Hub der Düsennadel 6 einstellbar. Durch den Betätigungshebel 12 ist über eine Stange 16 außerdem eine in Fig. 4 erkennbare Ventilanordnung 17 mit einer hinteren Stelleinrichtung 18 zur Steuerung der Druckluftzufuhr zur Düsenanordnung 9 betätigbar.The spray gun shown in Fig. 1 includes a gun body 1 with a handle 2 and an upper part 3, on which a suspension hook 4 is formed. Through the upper part 3 extends from the front to the rear continuous and multi-stepped through hole 5, in which a nozzle needle 6 is guided axially displaceable. The through hole 5 forms in a front region an enlarged receiving space 7, in which an oblique inlet bore 8 opens to the attachment of a color receiving container, not shown. At the front end of the through hole 5, a nozzle assembly 9 is mounted, which contains a fixable by means of a thread on the upper part 3 of the gun body 1 paint nozzle 10. The paint nozzle 10 has at its front end a nozzle bore 11 which, together with a tapered front end portion of an actuating lever 12 axially movable nozzle needle 6 an adjustable inlet for the paint, the paint or the like. Forms. The actuating lever 12 is connected to the nozzle needle 6 in such a way that, upon retraction of the actuating lever 12, it is displaced against the force of a spring 13 towards the rear and opens the nozzle bore 11 for dispensing the ink. About a arranged at the rear end of the through hole 5 adjusting screw 14 with corresponding lock nut 15, the bias of the compression spring 13 and the stroke of the nozzle needle 6 are adjustable. By the actuating lever 12 is also a recognizable in Fig. 4 valve assembly 17 with a rear adjusting device 18 for controlling the compressed air supply to the nozzle assembly 9 via a rod 16 operable.

Über einen stromaufwärts der Ventilanordnung 17 liegenden Teil 19 und einen - in Fig. 4 gezeigten - stromabwärts der Ventilanordnung 17 liegenden Teil 20 eines Druckluftzufuhrkanals im. Pistolengehäuse 1 wird die Druckluft zu einem Luftleitsystem 21 und von dort zu einem Ringspalt 22 geleitet, der die Düsenbohrung 11 umgibt. Die Druckluft erzeugt im Bereich der Düsenbohrung 11 ein Vakuum, durch das die Farbe aus der Düsenbohrung 11 gesaugt und mit der Druckluft unter Bildung eines Rundstrahls mitgerissen wird. Über sogenannte Hornluftbohrungen 23 in vorstehenden Hörnern 24 einer die Farbdüse 10 umgebenden Luftkappe 25 kann außerdem die Druckluft zur Formung des Rundstrahls in einen Flachstrahl austreten. Die Luftkappe 25 ist über eine Überwurfmutter 26 an dem Oberteil 3 des Gehäuses 1 befestigbar.About an upstream of the valve assembly 17 lying part 19 and a - shown in Fig. 4 - downstream of the valve assembly 17 lying part 20 of a compressed air supply channel in. Pistol case 1, the compressed air is passed to an air guide system 21 and from there to an annular gap 22 which surrounds the nozzle bore 11. The compressed air generated in the region of the nozzle bore 11 a vacuum through which the ink is sucked out of the nozzle bore 11 and entrained with the compressed air to form an omnidirectional jet. About so-called Hornluftbohrungen 23 in projecting horns 24 of a paint nozzle 10 surrounding air cap 25 may also be the compressed air for forming the round jet in emerge a flat jet. The air cap 25 can be attached via a union nut 26 to the upper part 3 of the housing 1.

Die Düsenanordnung 9 und deren Aufbau ist als solches bereits bekannt. Eine mögliche Düsenanordnung ist z.B. in der EP 0710 506 A1 offenbart. Zu weiteren Einzelheiten bezüglich der Düsenanordnung wird daher auf diese Druckschrift verwiesen, deren Offenbarungsgehalt zum Gegenstand dieser Anmeldung gemacht wird.The nozzle assembly 9 and its structure is already known as such. A possible nozzle arrangement is eg in the EP 0710 506 A1 disclosed. For further details regarding the nozzle arrangement, reference is therefore made to this document whose disclosure content is made the subject of this application.

Die Spritzpistole enthält eine in den Handgriff 2 des Pistolenkörpers 1 integrierte Druckmesseinrichtung 27, die im wesentlichen aus einem Druckaufnehmer 28, einer Schaltungsanordnung 29 und einer Anzeigeeinrichtung 30 besteht. Wie aus Fig. 2 hervorgeht, ist der z.B. als piezoelektrischer Drucksensor ausgeführte Druckaufnehmer 28 in eine seitlich im Handgriff 2 vorgesehene Sacklochbohrung 31 eingesetzt, die mit einer oberen Messfläche 32 einen Druckerfassungsraum 33 begrenzt. Der Druckaufnehmer 28 ist über elektrische Anschlüsse 34 mit der Schaltungsanordnung 29 verbunden, die im wesentlichen aus einer in einem entsprechenden Aufnahmeraum 35 im Pistolengriff 2 angeordneten Platine mit der entsprechenden Schaltung besteht. Über der Schaltungsanordnung 29 ist die z.B. als LCD-Anzeige ausgeführte Anzeigeeinrichtung 30 für die Anzeige des durch den Druckaufnehmer 28 erfaßten Drucks angeordnet. Die Schaltungsanordnung 29 und die Anzeigeeinrichtung 30 werden über ein Zwischenelement 36 durch eine mit einem Sichtfenster 37 versehene Abdeckplatte 38 im Pistolengriff 2 gehalten. Die mit der Seitenfläche des Pistolengriffs 2 abschließende Abdeckplatte 38 ist zur Verhinderung eines Flüssigkeits- und Schmutzeintritts durch Dichtelemente 39 abgedichtet mit dem Pistolengriff 2 verschraubt. Auf der zur Anzeigeeinrichtung 30 entgegengesetzten Seite des Handgriffs 2 ist ein durch einen Deckel 40 verschließbares Aufnahmefach 41 für eine Batterie 42 zur elektrischen Versorgung der Auswerteschaltung und Anzeigeeinrichtung vorgesehen.The spray gun includes an integrated into the handle 2 of the gun body 1 pressure measuring device 27, which consists essentially of a pressure transducer 28, a circuit arrangement 29 and a display device 30. As is apparent from Fig. 2, the e.g. designed as a piezoelectric pressure sensor pressure sensor 28 is inserted into a laterally provided in the handle 2 blind hole 31, which defines a pressure sensing space 33 with an upper measuring surface 32. The pressure transducer 28 is connected via electrical connections 34 to the circuit arrangement 29, which consists essentially of a arranged in a corresponding receiving space 35 in the pistol grip 2 board with the corresponding circuit. Above the circuit 29 is the e.g. arranged as LCD display display device 30 for the display of the detected by the pressure transducer 28 pressure. The circuit arrangement 29 and the display device 30 are held in the pistol grip 2 via an intermediate element 36 by a cover plate 38 provided with a viewing window 37. The final with the side surface of the pistol grip 2 cover plate 38 is sealed to prevent fluid and dirt entry by sealing elements 39 screwed to the pistol grip 2. On the side opposite to the display device 30 side of the handle 2 a closable by a cover 40 receiving compartment 41 is provided for a battery 42 for the electrical supply of the evaluation circuit and display device.

Wie besonders aus Fig. 3 hervorgeht, ist der Druckerfassungsraum 33 durch einen mit einer Kapillare 43 versehenen Verbindungskanal 44 mit dem stromaufwärts der Ventilanordnung gelegenen Teil 19 des Druckluftzufuhrkanals im Bereich des Pistoleneintritts verbunden. Die Kapillare ist als Bohrung mit einem Durchmesser von 0,5 bis 1,8 mm, ausgeführt. Bei dieser Ausführung ist der Verbindungskanal 44 in Form einer mittels einer Kugel 45 nach außen verschlossenen seitlichen Verbindungsbohrung ausgeführt. Durch die Kapillare 43 kann verhindert werden, dass ein bei der Reinigung der Spritzpistole verwendetes Reinigungs- bzw.Referring particularly to Fig. 3, the pressure sensing space 33 is connected by a connecting channel 44 provided with a capillary 43 to the upstream portion of the valve assembly 19 of the compressed air supply passage in the area of the gun inlet. The capillary is designed as a bore with a diameter of 0.5 to 1.8 mm. In this embodiment, the connecting channel 44 is in the form of a means of a ball 45 closed to the outside lateral connecting hole. By the capillary 43 can be prevented that a used in the cleaning of the spray gun cleaning or

Lösungsmittel und evtl. gelöste Lackpartikel in den Druckerfassungsraum gelangen und dort zu einer Beeinträchtigung der Meßgenauigkeit führen oder sogar eine Messung verhindern.Solvent and possibly dissolved paint particles get into the pressure detection chamber and there lead to an impairment of the accuracy or even prevent a measurement.

Die in den Fig. 4 bis 6 dargestellte, nicht beanspruchte Ausführung unterscheidet sich von der vorstehend beschriebenen Ausführung dadurch, dass die Kapillare 43 in einem Verbindungskanal 46 angeordnet ist, der zwischen dem Druckerfassungsraum 33 und einem stromabwärts der Ventilanordnung 17 angeordneten Teil 20 des Druckluftzufuhrkanals liegt. Dadurch kann der durch die Stelleinrichtung 18 eingestellte und für das Spritzen zur Verfügung stehende Luftdruck erfaßt und angezeigt werden. In Fig. 5 ist eine weitere Einstelleinrichtung 47 mit einem seitlichen Drehknopf 48 zur Regulierung der Druckluftzufuhr zu den Bohrungen 23 gezeigt. Der weitere Aufbau der Spritzpistole entspricht der in den Fig. 1 bis 3 gezeigten Ausführung.The non-claimed embodiment shown in FIGS. 4 to 6 differs from the embodiment described above in that the capillary 43 is arranged in a connecting channel 46 which lies between the pressure-sensing chamber 33 and a part 20 of the compressed-air supply channel arranged downstream of the valve arrangement 17 , Thereby, the set by the adjusting device 18 and available for spraying air pressure can be detected and displayed. In Fig. 5, a further adjusting device 47 is shown with a lateral knob 48 for regulating the supply of compressed air to the bores 23. The further construction of the spray gun corresponds to the embodiment shown in FIGS. 1 to 3.

Bei der in den Fig. 7 bis 9 gezeigten, ebenfalls nicht beanspruchten Ausführung ist der Druckaufnehmer 28 in einer gesonderten Aufnahmekammer 49 oberhalb der Schaltungsanordnung 29, der Anzeigeeinrichtung 30 und des Aufnahmefachs 41 für die Batterie 42 angeordnet. Ansonsten ist die Spritzpistole im wesentlichen wie bei dem zuvor beschriebenen Ausführungsbeispiel gemäß der Fig. 4 bis 6 aufgebaut. Auch bei dieser Ausführung kann der durch die Stelleinrichtung 18 eingestellte Arbeitsdruck erfaßt und angezeigt werden.In the embodiment also shown in FIGS. 7 to 9, the pressure sensor 28 is arranged in a separate receiving chamber 49 above the circuit arrangement 29, the display device 30 and the receiving compartment 41 for the battery 42. Otherwise, the spray gun is essentially constructed as in the previously described embodiment according to FIGS. 4 to 6. Also in this embodiment, the adjusted by the actuator 18 working pressure can be detected and displayed.

In den Fig. 10 und 11 ist eine weitere Ausführung einer Spritzpistole gezeigt. Bei dieser Ausführung weist der Pistolenkörper 1 ein hinteres Endstück 50 auf, das entweder einstückig mit dem. Oberteil 3 oder als z.B. einschraubbares bzw. einsteckbares Endteil ausgeführt sein kann. In dem Endstück 50 ist eine Aufnahmekammer 51 mit einem Druckerfassungsraum 52 für den Druckaufnehmer 28 vorgesehen. Der Druckerfassungsraum. 52 ist über eine in Achsrichtung des Endteils angeordnete Kapillare 53 mit dem Druckluftzufuhrkanal stromaufwärts der Ventilanordnung 17 verbunden. An dem Endstück 50 ist eine digitale Anzeigeeinrichtung 54 mit einem Anzeigefeld 55 derart angeordnet, dass sie beim Arbeiten mit der Spritzpistole von hinten sichtbar ist. Der Druck kann somit während des Spritzens ständig überwacht werden.FIGS. 10 and 11 show a further embodiment of a spray gun. In this embodiment, the gun body 1 has a rear end piece 50 which is either integral with the. Upper part 3 or as e.g. can be executed screwed or plug-in end part. In the end piece 50, a receiving chamber 51 is provided with a pressure-sensing space 52 for the pressure transducer 28. The pressure detection room. 52 is connected via a arranged in the axial direction of the end capillary 53 to the compressed air supply channel upstream of the valve assembly 17. At the end piece 50, a digital display device 54 is arranged with a display panel 55 such that it is visible from behind when working with the spray gun. The pressure can thus be constantly monitored during spraying.

Die Erfindung ist nicht auf die vorstehend beschriebenen und in der Zeichnung dargestellten Ausführungsbeispiele beschränkt. So können z.B. anstelle piezoelektrischer Druckaufnehmer auch andere geeignete Druckaufnehmer bzw. Drucksensoren verwendet werden. Darüber hinaus können die Druckaufnehmer auch an anderen geeigneten Stellen des PistoIenkörpers angebracht sein.The invention is not limited to the embodiments described above and shown in the drawing. For example, instead of piezoelectric pressure transducer Other suitable pressure transducers or pressure sensors are used. In addition, the pressure transducers can also be attached to other suitable locations of the PistoIenkörpers.

Claims (4)

  1. Spray gun with
    - a gun body (1),
    - a nozzle arrangement (9) arranged on the gun body (1),
    - a compressed air supply channel (19, 20) arranged in the gun body (1) with a valve arrangement (17) for controlling the supply of compressed air to the nozzle arrangement (9),
    - a control device (6, 13) for setting the supply of spray material,
    - an actuating element (12) for actuating the valve arrangement (17) and the control device (6, 13), and
    - a pressure measuring device (27) which is integrated in the gun body, with a pressure pickup (28) and an indicating device (30) for detecting and indicating the pressure in the compressed air supply channel (19, 20),
    characterised in that
    the gun body (1) contains a pressure detection chamber (33) provided in its grip (2) for the pressure pickup (28), and in that arranged between the compressed air supply channel (19, 20) and the pressure detection chamber (53) there is a capillary (43) to prevent a cleaning agent or solvent used to clean the spray gun entering the pressure detection chamber (33), the capillary (43) being arranged inside the gun body (1) in a connecting channel (44) between the pressure detection chamber (33) and a part (19) of the compressed air supply channel (19, 20) located upstream of the valve arrangement (17).
  2. Spray gun according to claim 1, characterised in that the indicating device (30) is incorporated in the grip (2) of the gun body (1).
  3. Spray gun according to claim 1 or 2, characterised in that the pressure measuring device (27) contains a circuit arrangement (29) which is arranged in the gun body (1).
  4. Spray gun according to one of claims 1 to 3, characterised in that a receiving chamber (41) for a battery (42) is arranged in the gun body (1).
EP01962787A 2000-06-30 2001-06-27 Spray gun Expired - Lifetime EP1299194B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10031857 2000-06-30
DE10031857A DE10031857A1 (en) 2000-06-30 2000-06-30 spray gun
PCT/EP2001/007324 WO2002002242A1 (en) 2000-06-30 2001-06-27 Spray gun

Publications (2)

Publication Number Publication Date
EP1299194A1 EP1299194A1 (en) 2003-04-09
EP1299194B1 true EP1299194B1 (en) 2007-10-31

Family

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Application Number Title Priority Date Filing Date
EP01962787A Expired - Lifetime EP1299194B1 (en) 2000-06-30 2001-06-27 Spray gun

Country Status (5)

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US (1) US7017838B2 (en)
EP (1) EP1299194B1 (en)
JP (1) JP3968123B2 (en)
DE (2) DE10031857A1 (en)
WO (1) WO2002002242A1 (en)

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USD768820S1 (en) 2014-09-03 2016-10-11 Sata Gmbh & Co. Kg Paint spray gun with pattern
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US9533317B2 (en) 2009-07-08 2017-01-03 Sata Gmbh & Co. Kg Paint spray gun
US9333519B2 (en) 2010-12-02 2016-05-10 Sata Gmbh & Co. Kg Spray gun and accessories
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USD770593S1 (en) 2014-07-31 2016-11-01 Sata Gmbh & Co. Kg Paint spray gun
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USD768820S1 (en) 2014-09-03 2016-10-11 Sata Gmbh & Co. Kg Paint spray gun with pattern
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Also Published As

Publication number Publication date
EP1299194A1 (en) 2003-04-09
JP2004501763A (en) 2004-01-22
DE10031857A1 (en) 2002-01-17
US20030189105A1 (en) 2003-10-09
US7017838B2 (en) 2006-03-28
DE50113197D1 (en) 2007-12-13
WO2002002242A1 (en) 2002-01-10
JP3968123B2 (en) 2007-08-29

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