EP2050510A1 - Dispensing device - Google Patents

Dispensing device Download PDF

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Publication number
EP2050510A1
EP2050510A1 EP08105506A EP08105506A EP2050510A1 EP 2050510 A1 EP2050510 A1 EP 2050510A1 EP 08105506 A EP08105506 A EP 08105506A EP 08105506 A EP08105506 A EP 08105506A EP 2050510 A1 EP2050510 A1 EP 2050510A1
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EP
European Patent Office
Prior art keywords
piston rod
gear
drive unit
tooth
squeezing device
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
EP08105506A
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German (de)
French (fr)
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EP2050510B1 (en
Inventor
Christian Hefele
Rainer Strobel-Schmidt
Ingo Löschky
Franz Heiberger
Peter Ostermeier
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Hilti AG
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Hilti AG
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Publication of EP2050510A1 publication Critical patent/EP2050510A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
    • B05C17/01—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes with manually mechanically or electrically actuated piston or the like
    • B05C17/0103—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes with manually mechanically or electrically actuated piston or the like with electrically actuated piston or the like

Definitions

  • the invention relates to a squeezing device for mass-containing container with at least one piston rod, which has a tooth profile along its longitudinal extent, and with a drive unit for the at least one piston rod with a drive and with one, driven by the drive, with the tooth profiling of the at least one piston rod meshing gear.
  • Such a squeezing device is also referred to as Zahnstangendispenser and serves to dispense in containers, such. B. in foil pouches or cartridges, packed masses at an application site.
  • These squeezing devices are for dispensing different types of masses, such as. As mortar or sealants suitable.
  • the at least one piston rod is advanced over a predetermined amount, wherein a pressure plate arranged on the piston rod acts on the container and a corresponding amount of the mass present therein is discharged through an outlet opening in the head part.
  • the piston rod To replace a squeezed out container, the piston rod must be retracted so that the container inserted into the squeezing device can be removed from it and replaced by another container.
  • a disadvantage of the known solution is that the return of the piston rod to its initial position is time-consuming.
  • a disadvantage of the known solution is that the decoupling of the piston rod from the gearwheel stiff and subject to high wear.
  • the object of the invention is to provide a generic Auspressvorraum, which allows a low-wear and easy decoupling of the gear from the piston rod.
  • the at least one toothed wheel can be displaced from a first position coupled to the tooth profiling of the at least one piston rod into a position decoupled from the tooth profiling of the at least one piston rod.
  • the drive train from the drive to the at least one piston rod is interrupted by displacement of the at least one gear, whereby the at least one piston rod is freely displaceable. Since the gear is offset, the wear during decoupling and coupling of the drive train, for example, with respect to a squeezing device according to the DE 35 35 229 A1 Significantly reduced. In this case, no constraints occur between the meshing with the tooth profiling of the at least one piston rod gear and the at least one piston rod.
  • the drive unit with the gear for decoupling the gear from the tooth profiling of the at least one piston rod is displaceable, which ensures easy operation of the extrusion device.
  • the drive train from the drive to the at least one piston rod is interrupted by displacement of the entire drive unit, whereby the at least one piston rod is freely displaceable.
  • the drive unit has an axis of rotation extending parallel to the axis of rotation of the gear around which the drive unit is rotatable with the at least one gear.
  • the axis of rotation is advantageously aligned perpendicular to the extrusion direction of the extrusion device.
  • the gear comes out of engagement with the tooth profiling of at least one piston rod.
  • the at least one piston rod is freely displaceable and can be easily withdrawn or advanced.
  • the drive unit counter to the direction of rotation for decoupling the gear from the at least one piston rod, the gear is again brought into engagement with the tooth profiling of the at least one piston rod.
  • the at least one gear is axially displaceable along the axis of rotation of the gear.
  • the at least one gear is moved axially transversely to the extension of the tooth profiling.
  • the at least one piston rod is freely displaceable and can be easily withdrawn or advanced.
  • the at least one gear is displaced by a lever along a shaft of the gear extending in the direction of the axis of rotation of the gear, wherein such a shaft does not necessarily have to be straight.
  • the drive unit with the at least one gear for decoupling the at least one gear from the tooth profiling of the at least one piston rod axially displaceable.
  • an actuating element for displacing the at least one gear is provided, which allows a simple displacement of the at least one gear by the user.
  • This also applies to an advantageous embodiment in which the drive unit with the at least one gear is displaceable.
  • a rotatably displaceable drive unit on a housing of the drive unit a along the axis of rotation of the drive unit extending designed as a handle projection is provided, the z. B. is manually operated, so that the user continue holding the squeezing with the actuating element operating hand and position the now freely movable, at least one piston rod with the other hand.
  • an axially displaceable at least one gear for example, a rocker arm is provided, the manual operation and the at least one gear is axially offset so that this with the tooth profiling of the at least one piston rod out of engagement.
  • the user can continue holding the squeezing device with the hand actuating the actuating element and with the other hand positioning the now freely movable, at least one piston rod.
  • the at least one gear is displaceable against a spring force of a spring element and is forced by the displacement of the spring element back into a position in which the at least one gear meshes with the tooth profile of the at least one piston rod.
  • the spring element is designed for example as a torsion spring.
  • the spring element In an axially displaceable gear or in an axially displaceable drive unit with at least one gear, the spring element z.
  • a locking lever for holding the at least one gear in the decoupled from the piston rod position.
  • the locking lever mechanically fixes the at least one toothed wheel in the decoupled position so that the user does not have to hold the at least one toothed wheel neither directly nor indirectly in the decoupled position for handling the entire ejection device.
  • the locking lever is provided, for example, on the outer housing of the extrusion device and engages in a locked position in a correspondingly formed recording of the gear or a displaceable drive unit in a correspondingly formed receptacle on the drive unit or on a housing part.
  • the in the FIGS. 1 to 3 illustrated squeezing device 11 is used to squeeze a mass from a container 12, which is arranged interchangeable in a receiving space 13 of the squeezing device 11.
  • the squeezing device 11 has two piston rods 16, each of which has a tooth profile 17 along its longitudinal extent, the tooth profiles 17 of the two piston rods 16 facing one another.
  • the extrusion device 11 has a drive unit 21 for the piston rods 16, which comprises an electric motor as the drive 22, a transmission gear 23 and two gear wheels 24 driven by the drive 22 and meshing with the tooth profiles 17 of the piston rods 16.
  • the drive unit 21 has an axis of rotation 26 running parallel to the axis of rotation 25 of the gear 24, about which the drive unit 21 with the gearwheels 24 is rotatable in the direction of the arrow 31.
  • the drive unit 21 is arranged in a housing 27, on which an actuating element 28 extending along the axis of rotation 26 of the drive unit 21 designed as a handle projection for rotatable displacement of the drive unit 21 against the spring force of a spring element 29 is provided.
  • the spring element 29 is a torsion spring.
  • the spring force of the spring element 29 forces the drive unit 21 back into a position in which the gears 24 mesh again with the tooth profiles 17 on the piston rods 16.
  • the drive unit 21 is rotated about its axis of rotation 26 opposite to the direction of the arrow 31 until the gears 24 mesh again with the tooth profiles 17 on the piston rods 16.
  • a Auspressvorraum 31 is shown in sections, in which the drive unit 41 with the gears 44 for decoupling the gears 44 of the tooth profiles 17 of the piston rods 16 along the rotation axis 45 of the gear 44 axially displaceable in the direction of the arrow 51.
  • an actuating element 48 for axially displacing the drive unit 21 is provided on the housing 47 of the drive unit 41.
  • a coil spring is provided as a spring element 49, against the spring force, the drive unit 41 is axially displaceable.
  • the locking lever 50 which penetrates in the locked state into the gap between the drive unit 41 and the housing part 40 is the drive unit 41 can be releasably locked in the decoupled from the piston rod 16 position.
  • the gears 44 are again brought into meshing engagement with the tooth profiles 17 of the piston rods.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)
  • Coating Apparatus (AREA)
  • Reciprocating Pumps (AREA)
  • Tubes (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)

Abstract

The pressing device (11) has a piston rod (16), which has a sprocket profile (17). A gear wheel (24) is provided that is coupled with the sprocket profile at a certain position and the piston rod is shifted into a decoupled position of the sprocket profile.

Description

Die Erfindung betrifft eine Auspressvorrichtung für Massen enthaltende Gebinde mit zumindest einer Kolbenstange, die entlang ihrer Längserstreckung eine Zahnprofilierung aufweist, und mit einer Antriebseinheit für die zumindest eine Kolbenstange mit einem Antrieb und mit einem, von dem Antrieb angetriebenen, mit der Zahnprofilierung der zumindest einen Kolbenstange kämmenden Zahnrad.The invention relates to a squeezing device for mass-containing container with at least one piston rod, which has a tooth profile along its longitudinal extent, and with a drive unit for the at least one piston rod with a drive and with one, driven by the drive, with the tooth profiling of the at least one piston rod meshing gear.

Eine derartige Auspressvorrichtung wird auch als Zahnstangendispenser bezeichnet und dient dem Ausbringen von in Gebinden, wie z. B. in Folienbeutel oder Kartuschen, verpackten Massen an einem Applikationsort. Diese Auspressvorrichtungen sind zum Ausbringen von verschiedenen Arten von Massen, wie z. B. Mörtel- oder Dichtmassen geeignet. Durch Betätigung des Antriebs wird die zumindest eine Kolbenstange über ein vorbestimmtes Mass vorgeschoben, wobei ein an der Kolbenstange angeordneter Druckteller auf das Gebinde einwirkt und eine entsprechende Menge der darin vorhandenen Masse durch eine Ausgabeöffnung im Kopfteil ausgebracht wird. Zum Austauschen eines ausgepressten Gebindes muss die Kolbenstange zurückgezogen werden, damit das in die Auspressvorrichtung eingelegte Gebinde aus diesem entnommen und durch ein anderes Gebinde ersetzt werden kann.Such a squeezing device is also referred to as Zahnstangendispenser and serves to dispense in containers, such. B. in foil pouches or cartridges, packed masses at an application site. These squeezing devices are for dispensing different types of masses, such as. As mortar or sealants suitable. By actuating the drive, the at least one piston rod is advanced over a predetermined amount, wherein a pressure plate arranged on the piston rod acts on the container and a corresponding amount of the mass present therein is discharged through an outlet opening in the head part. To replace a squeezed out container, the piston rod must be retracted so that the container inserted into the squeezing device can be removed from it and replaced by another container.

Aus der DE 22 27 930 A1 ist eine gattungsgemässe Auspressvorrichtung mit einer Kolbenstange, die entlang ihrer Längserstreckung eine Zahnprofilierung aufweist, und mit einer Antriebseinheit für die zumindest eine Kolbenstange mit einem Motor und Getriebe als Antrieb und mit einem, von dem Antrieb angetriebenen, mit der Zahnprofilierung der zumindest einen Kolbenstange kämmenden Zahnrad bekannt. Mittels Polumschaltung des Motors wird die vorgeschobene Kolbenstange in ihre Ausgangsstellung zurückgefahren, in der das eingelegte Gebinde entnehmbar und ein neues Gebinde in die Auspressvorrichtung einlegbar ist.From the DE 22 27 930 A1 is a generic Auspressvorrichtung with a piston rod which has a tooth profile along its longitudinal extent, and with a drive unit for the at least one piston rod with a motor and gear drive and with a, driven by the drive, with the tooth profiling of the at least one piston rod meshing gear known. By means of Polumschaltung the motor, the advanced piston rod is moved back to its original position in which the inserted container can be removed and a new container in the squeezing device can be inserted.

Nachteilig an der bekannten Lösung ist, dass die Rückführung der Kolbenstange in ihre Ausgangsstellung zeitaufwändig ist.A disadvantage of the known solution is that the return of the piston rod to its initial position is time-consuming.

Bei einer gattungsgemässen Auspressvorrichtung gemäss der DE 35 35 229 A1 ist die Zahnprofilierung der Kolbenstange durch eine axiale Drehbewegung der Kolbenstange um deren Längsachse ausser Eingriff mit dem Zahnrad bringbar, wodurch die Kolbenstange frei verschiebbar wird.In a generic Auspressvorrichtung according to the DE 35 35 229 A1 the tooth profiling of the piston rod by an axial rotational movement of the piston rod about its longitudinal axis out of engagement with the gear can be brought, whereby the piston rod is freely displaced.

Nachteilig an der bekannten Lösung ist, dass die Entkopplung der Kolbenstange von dem Zahnrad schwergängig und einem hohen Verschleiss unterworfen ist.A disadvantage of the known solution is that the decoupling of the piston rod from the gearwheel stiff and subject to high wear.

Aufgabe der Erfindung ist es, eine gattungsgemässe Auspressvorrichtung zu schaffen, die eine verschleissarme und einfache Entkopplung des Zahnrades von der Kolbenstange ermöglicht.The object of the invention is to provide a generic Auspressvorrichtung, which allows a low-wear and easy decoupling of the gear from the piston rod.

Die Aufgabe ist durch die Merkmale des unabhängigen Anspruchs gelöst. Vorteilhafte Weiterbildungen sind in den Unteransprüchen dargelegt.The object is solved by the features of the independent claim. Advantageous developments are set forth in the subclaims.

Gemäss der Erfindung ist das zumindest eine Zahnrad von einer ersten mit der Zahnprofilierung der zumindest einen Kolbenstange gekoppelten Stellung in eine von der Zahnprofilierung der zumindest einen Kolbenstange entkoppelten Stellung versetzbar.According to the invention, the at least one toothed wheel can be displaced from a first position coupled to the tooth profiling of the at least one piston rod into a position decoupled from the tooth profiling of the at least one piston rod.

Der Antriebsstrang vom Antrieb auf die zumindest eine Kolbenstange wird durch Versetzen des zumindest einen Zahnrades unterbrochen, womit die zumindest eine Kolbenstange frei verschieblich ist. Da das Zahnrad versetzt wird, ist der Verschleiss beim Entkoppeln und Koppeln des Antriebsstrangs beispielsweise gegenüber einer Auspressvorrichtung gemäss der DE 35 35 229 A1 massgeblich reduziert. Dabei treten keine Zwängungen zwischen dem mit der Zahnprofilierung der zumindest einen Kolbenstange kämmenden Zahnrad und der zumindest einen Kolbenstange auf.The drive train from the drive to the at least one piston rod is interrupted by displacement of the at least one gear, whereby the at least one piston rod is freely displaceable. Since the gear is offset, the wear during decoupling and coupling of the drive train, for example, with respect to a squeezing device according to the DE 35 35 229 A1 Significantly reduced. In this case, no constraints occur between the meshing with the tooth profiling of the at least one piston rod gear and the at least one piston rod.

Vorzugsweise ist die Antriebseinheit mit dem Zahnrad zur Entkoppelung des Zahnrades von der Zahnprofilierung der zumindest einen Kolbenstange versetzbar, was eine einfache Bedienung der Auspressvorrichtung gewährleistet. Der Antriebsstrang vom Antrieb auf die zumindest eine Kolbenstange wird durch Versetzen der gesamten Antriebseinheit unterbrochen, womit die zumindest eine Kolbenstange frei verschieblich ist.Preferably, the drive unit with the gear for decoupling the gear from the tooth profiling of the at least one piston rod is displaceable, which ensures easy operation of the extrusion device. The drive train from the drive to the at least one piston rod is interrupted by displacement of the entire drive unit, whereby the at least one piston rod is freely displaceable.

Bevorzugt weist die Antriebseinheit eine parallel zur Rotationsachse des Zahnrades verlaufende Drehachse auf, um welche die Antriebseinheit mit dem zumindest einen Zahnrad drehbar ist. Die Drehachse ist vorteilhaft senkrecht zur Auspressrichtung der Auspressvorrichtung ausgerichtet. Durch Drehen der gesamten Antriebseinheit mit dem Zahnrad um die Drehachse kommt das Zahnrad ausser Eingriff mit der Zahnprofilierung der zumindest einen Kolbenstange. Die zumindest eine Kolbenstange ist frei verschieblich und kann einfach zurückgezogen oder vorgeschoben werden. Anschliessend wird durch Drehen der Antriebseinheit entgegen der Drehrichtung zur Entkopplung des Zahnrades von der zumindest einen Kolbenstange das Zahnrad wieder mit der Zahnprofilierung der zumindest einen Kolbenstange in Eingriff gebracht. Durch das Aus- beziehungsweise das Einschwenken des Zahnrades in die Zahnprofilierung der zumindest einen Kolbenstange tritt beim Entkoppeln und Koppeln kein Verschleiss zwischen diesen Bauteilen auf, da die vorteilhaft spitz auslaufenden Zahnköpfe des Zahnrades und der Zahnprofilierung an der Kolbenstange beim Einschwenken selbst finden.Preferably, the drive unit has an axis of rotation extending parallel to the axis of rotation of the gear around which the drive unit is rotatable with the at least one gear. The axis of rotation is advantageously aligned perpendicular to the extrusion direction of the extrusion device. By turning the entire drive unit with the Gear around the axis of rotation, the gear comes out of engagement with the tooth profiling of at least one piston rod. The at least one piston rod is freely displaceable and can be easily withdrawn or advanced. Subsequently, by turning the drive unit counter to the direction of rotation for decoupling the gear from the at least one piston rod, the gear is again brought into engagement with the tooth profiling of the at least one piston rod. By the off or the pivoting of the gear in the tooth profiling of the at least one piston rod occurs during decoupling and coupling no wear between these components, since the advantageous pointed expiring tooth tips of the gear and the tooth profiling on the piston rod find itself when swinging.

In einer alternativen Ausführung der Erfindung ist das zumindest eine Zahnrad entlang der Rotationsachse des Zahnrades axial versetzbar. Vorteilhaft wird das zumindest eine Zahnrad quer zur Erstreckung der Zahnprofilierung axial verschoben. In dieser Stellung der Antriebseinheit ist die zumindest eine Kolbenstange frei verschieblich und kann einfach zurückgezogen oder vorgeschoben werden. Beispielsweise wird das zumindest eine Zahnrad mit einem Hebel entlang einer sich in Richtung der Rotationsachse des Zahnrades erstreckenden Welle des Zahnrades verschoben, wobei eine derartige Welle nicht zwingend geradlinig verlaufen muss.In an alternative embodiment of the invention, the at least one gear is axially displaceable along the axis of rotation of the gear. Advantageously, the at least one gear is moved axially transversely to the extension of the tooth profiling. In this position of the drive unit, the at least one piston rod is freely displaceable and can be easily withdrawn or advanced. For example, the at least one gear is displaced by a lever along a shaft of the gear extending in the direction of the axis of rotation of the gear, wherein such a shaft does not necessarily have to be straight.

In einer vorteilhaften Ausführung ist die Antriebseinheit mit dem zumindest einen Zahnrad zum Entkoppeln des zumindest einen Zahnrades von der Zahnprofilierung der zumindest einen Kolbenstange axial versetzbar.In an advantageous embodiment, the drive unit with the at least one gear for decoupling the at least one gear from the tooth profiling of the at least one piston rod axially displaceable.

Vorzugsweise ist ein Betätigungselement zum Versetzen des zumindest einen Zahnrades vorgesehen, das eine einfache Versetzung des zumindest einen Zahnrades durch den Anwender ermöglicht. Dies gilt auch für eine vorteilhafte Ausführung, bei der die Antriebseinheit mit dem zumindest einen Zahnrad versetzbar ist.Preferably, an actuating element for displacing the at least one gear is provided, which allows a simple displacement of the at least one gear by the user. This also applies to an advantageous embodiment in which the drive unit with the at least one gear is displaceable.

Beispielsweise ist bei einer drehbar versetzbaren Antriebseinheit an einem Gehäuse der Antriebseinheit ein entlang der Drehachse der Antriebseinheit verlaufender als Griff ausgebildeter Vorsprung vorgesehen, der z. B. manuell betätigbar ist, so dass der Anwender die Auspressvorrichtung weiterhin mit der das Betätigungselement betätigenden Hand halten und mit der anderen Hand die nun frei bewegliche, zumindest eine Kolbenstange positionieren kann.For example, in a rotatably displaceable drive unit on a housing of the drive unit a along the axis of rotation of the drive unit extending designed as a handle projection is provided, the z. B. is manually operated, so that the user continue holding the squeezing with the actuating element operating hand and position the now freely movable, at least one piston rod with the other hand.

Bei einem axial versetzbaren zumindest einen Zahnrad ist beispielsweise ein Kipphebel vorgesehen, bei dessen Betätigung manuell und das zumindest eine Zahnrad derart axial versetzt wird, dass dieses mit der Zahnprofilierung der zumindest einen Kolbenstange ausser Eingriff kommt. Auch bei dieser Ausführungsform kann der Anwender die Auspressvorrichtung weiterhin mit der das Betätigungselement betätigenden Hand halten und mit der anderen Hand die nun frei bewegliche, zumindest eine Kolbenstange positionieren.In an axially displaceable at least one gear, for example, a rocker arm is provided, the manual operation and the at least one gear is axially offset so that this with the tooth profiling of the at least one piston rod out of engagement. Also in this embodiment, the user can continue holding the squeezing device with the hand actuating the actuating element and with the other hand positioning the now freely movable, at least one piston rod.

Bevorzugt ist das zumindest eine Zahnrad entgegen einer Federkraft eines Federelementes versetzbar und wird nach dem Versetzen von dem Federelement wieder in eine Stellung gezwungen, in der das zumindest eine Zahnrad mit der Zahnprofilierung der zumindest einen Kolbenstange kämmt. Bei einer drehbar versetzbaren Antriebseinheit ist das Federelement beispielsweise als Torsionsfeder ausgebildet. Bei einem axial versetzbaren Zahnrad oder bei einer axial versetzbaren Antriebseinheit mit zumindest einem Zahnrad ist das Federelement z. B. eine Zugfeder beispielsweise in Form einer Schraubenfeder.Preferably, the at least one gear is displaceable against a spring force of a spring element and is forced by the displacement of the spring element back into a position in which the at least one gear meshes with the tooth profile of the at least one piston rod. In a rotatably displaceable drive unit, the spring element is designed for example as a torsion spring. In an axially displaceable gear or in an axially displaceable drive unit with at least one gear, the spring element z. B. a tension spring, for example in the form of a coil spring.

Vorzugsweise ist ein Sperrhebel zum Halten des zumindest einen Zahnrades in der von der Kolbenstange entkoppelten Position vorgesehen. Mit dem Sperrhebel wird das zumindest eine Zahnrad in der entkoppelten Position mechanisch fixiert, so dass der Anwender das zumindest eine Zahnrad weder direkt noch indirekt in der entkoppelten Position für ein Handling der gesamten Auspressvorrichtung halten muss. Der Sperrhebel ist beispielsweise am Aussengehäuse der Auspressvorrichtung vorgesehen und greift in einer verriegelten Stellung in eine entsprechend ausgebildete Aufnahme des Zahnrades oder bei einer versetzbaren Antriebseinheit in eine entsprechend ausgebildete Aufnahme an der Antriebseinheit oder an einem Gehäuseteil ein.Preferably, a locking lever for holding the at least one gear in the decoupled from the piston rod position is provided. The locking lever mechanically fixes the at least one toothed wheel in the decoupled position so that the user does not have to hold the at least one toothed wheel neither directly nor indirectly in the decoupled position for handling the entire ejection device. The locking lever is provided, for example, on the outer housing of the extrusion device and engages in a locked position in a correspondingly formed recording of the gear or a displaceable drive unit in a correspondingly formed receptacle on the drive unit or on a housing part.

Die Erfindung wird nachstehend anhand von Ausführungsbeispielen näher erläutert. Es zeigen:

Fig. 1
Ein erstes Ausführungsbeispiel einer Auspressvorrichtung im Grundriss;
Fig. 2
ein Detail der entkoppelten Antriebseinheit im Grundriss;
Fig. 3
eine Seitenansicht gem. der Fig. 2 mit einem Teilschnitt; und
Fig. 4
ein zweites Ausführungsbeispiel der Auspressvorrichtung in Seitenansicht mit einer entkoppelten Antriebseinheit.
The invention will be explained in more detail below with reference to embodiments. Show it:
Fig. 1
A first embodiment of a Auspressvorrichtung in plan view;
Fig. 2
a detail of the decoupled drive unit in plan view;
Fig. 3
a side view acc. of the Fig. 2 with a partial section; and
Fig. 4
A second embodiment of the squeezing in side view with a decoupled drive unit.

Grundsätzlich sind in den Figuren gleiche Teile mit den gleichen Bezugszeichen versehen.Basically, the same parts are provided with the same reference numerals in the figures.

In der nachfolgenden Figurenbeschreibung wird jeweils auf eine versetzbare Antriebseinheit mit zumindest einem Zahnrad Bezug genommen. Für eine Auspressvorrichtung bei der nur das zumindest eine Zahnrad von einer ersten mit der Zahnprofilierung der zumindest einen Kolbenstange gekoppelten Stellung in eine von der Zahnprofilierung der zumindest einen Kolbenstange entkoppelten Stellung versetzbar ist, gelten die nachfolgenden Ausführungen sinngemäss.In the following description of the figures, reference will be made in each case to a displaceable drive unit having at least one toothed wheel. For a squeezing device in which only the at least one gear from a first with the tooth profiling of the at least one Piston rod coupled position in a decoupled from the tooth profiling of the at least one piston rod position can be offset, the following statements apply mutatis mutandis.

Die in den Figuren 1 bis 3 dargestellte Auspressvorrichtung 11 dient dem Auspressen einer Masse aus einem Gebinde 12, das in einem Aufnahmeraum 13 der Auspressvorrichtung 11 auswechselbar angeordnet ist. Die Auspressvorrichtung 11 weist zwei Kolbenstangen 16 auf, die entlang ihrer Längserstreckung jeweils eine Zahnprofilierung 17 aufweisen, wobei die Zahnprofilierungen 17 der beiden Kolbenstangen 16 einander zugewandt sind. Weiter weist die Auspressvorrichtung 11 eine Antriebseinheit 21 für die Kolbenstangen 16 auf, die einen Elektromotor als Antrieb 22, ein Übersetzungsgetriebe 23 und zwei, von dem Antrieb 22 angetriebene, miteinander und mit den Zahnprofilierungen 17 der Kolbenstangen 16 kämmende Zahnräder 24 umfasst.The in the FIGS. 1 to 3 illustrated squeezing device 11 is used to squeeze a mass from a container 12, which is arranged interchangeable in a receiving space 13 of the squeezing device 11. The squeezing device 11 has two piston rods 16, each of which has a tooth profile 17 along its longitudinal extent, the tooth profiles 17 of the two piston rods 16 facing one another. Furthermore, the extrusion device 11 has a drive unit 21 for the piston rods 16, which comprises an electric motor as the drive 22, a transmission gear 23 and two gear wheels 24 driven by the drive 22 and meshing with the tooth profiles 17 of the piston rods 16.

Die Antriebseinheit 21 weist eine parallel zur Rotationsachse 25 des Zahnrades 24 verlaufende Drehachse 26 auf, um welche die Antriebseinheit 21 mit den Zahnrädern 24 in Richtung des Pfeils 31 drehbar ist. Die Antriebseinheit 21 ist in einem Gehäuse 27 angeordnet, an dem als Betätigungselement 28 ein entlang der Drehachse 26 der Antriebseinheit 21 verlaufender als Griff ausgebildeter Vorsprung zum drehbaren Versetzen der Antriebseinheit 21 entgegen der Federkraft eines Federelementes 29 vorgesehen ist. Das Federelement 29 ist eine Torsionsfeder. Mittels des Sperrhebels 30, der im verriegelten Zustand in einer Ausnehmung im Gehäuseteil 20 eingreift, ist die Antriebseinheit 21 in der von der Kolbenstange 16 entkoppelten Position arretierbar. Nach dem Lösen der Arretierung durch Versetzen des Sperrhebels 30, zwingt die Federkraft des Federelementes 29 die Antriebseinheit 21 in eine Stellung zurück, in der die Zahnräder 24 wieder mit den Zahnprofilierungen 17 an den Kolbenstangen 16 kämmen. Für eine manuelle Rückführung der entkoppelten Antriebseinheit 21 in die gekoppelte Stellung wird die Antriebseinheit 21 um deren Drehachse 26 entgegen die Richtung des Pfeils 31 verdreht, bis die Zahnräder 24 wieder mit den Zahnprofilierungen 17 an den Kolbenstangen 16 kämmen.The drive unit 21 has an axis of rotation 26 running parallel to the axis of rotation 25 of the gear 24, about which the drive unit 21 with the gearwheels 24 is rotatable in the direction of the arrow 31. The drive unit 21 is arranged in a housing 27, on which an actuating element 28 extending along the axis of rotation 26 of the drive unit 21 designed as a handle projection for rotatable displacement of the drive unit 21 against the spring force of a spring element 29 is provided. The spring element 29 is a torsion spring. By means of the locking lever 30, which engages in the locked state in a recess in the housing part 20, the drive unit 21 can be locked in the decoupled from the piston rod 16 position. After releasing the lock by moving the locking lever 30, the spring force of the spring element 29 forces the drive unit 21 back into a position in which the gears 24 mesh again with the tooth profiles 17 on the piston rods 16. For a manual return of the decoupled drive unit 21 in the coupled position, the drive unit 21 is rotated about its axis of rotation 26 opposite to the direction of the arrow 31 until the gears 24 mesh again with the tooth profiles 17 on the piston rods 16.

In der Figur 4 ist ausschnittsweise eine Auspressvorrichtung 31 dargestellt, bei der die Antriebseinheit 41 mit den Zahnrädern 44 zur Entkoppelung der Zahnräder 44 von den Zahnprofilierungen 17 der Kolbenstangen 16 entlang der Rotationsachse 45 des Zahnrades 44 axial in Richtung des Pfeils 51 versetzbar ist. Am Gehäuse 47 der Antriebseinheit 41 ist ein Betätigungselement 48 zum axialen Versetzen der Antriebseinheit 21 vorgesehen. Weiter ist eine Schraubenfeder als Federelement 49 vorgesehen, entgegen dessen Federkraft die Antriebseinheit 41 axial versetzbar ist. Mittels des Sperrhebels 50, der im verriegelten Zustand in den Spalt zwischen der Antriebseinheit 41 und dem Gehäuseteil 40 eindringt, ist die Antriebseinheit 41 in der von der Kolbenstange 16 entkoppelten Position lösbar arretierbar. Nach dem Entfernen des Sperrhebels 50 und durch axiales Versetzen der Antriebseinheit 41 mit den Zahnrädern 44 entgegen der Richtung des Pfeils 51 werden die Zahnräder 44 wieder mit den Zahnprofilierungen 17 der Kolbenstangen in kämmenden Eingriff gebracht.In the FIG. 4 a Auspressvorrichtung 31 is shown in sections, in which the drive unit 41 with the gears 44 for decoupling the gears 44 of the tooth profiles 17 of the piston rods 16 along the rotation axis 45 of the gear 44 axially displaceable in the direction of the arrow 51. On the housing 47 of the drive unit 41, an actuating element 48 for axially displacing the drive unit 21 is provided. Next, a coil spring is provided as a spring element 49, against the spring force, the drive unit 41 is axially displaceable. By means of the locking lever 50, which penetrates in the locked state into the gap between the drive unit 41 and the housing part 40 is the drive unit 41 can be releasably locked in the decoupled from the piston rod 16 position. After removing the locking lever 50 and by axially displacing the drive unit 41 with the gears 44 against the direction of the arrow 51, the gears 44 are again brought into meshing engagement with the tooth profiles 17 of the piston rods.

Claims (7)

Auspressvorrichtung für Massen enthaltende Gebinde (12) mit zumindest einer Kolbenstange (16), die entlang ihrer Längserstreckung eine Zahnprofilierung (17) aufweist, und
mit einer Antriebseinheit (21; 41) für die zumindest eine Kolbenstange (16) mit einem Antrieb (22) und mit zumindest einem, von dem Antrieb (22) angetriebenen, mit der Zahnprofilierung (17) der zumindest einen Kolbenstange (16) kämmenden Zahnrad (24; 44), dadurch gekennzeichnet, dass
das zumindest eine Zahnrad (24; 44) von einer ersten mit der Zahnprofilierung (17) der zumindest einen Kolbenstange (16) gekoppelten Stellung in eine von der Zahnprofilierung (17) der zumindest einen Kolbenstange (16) entkoppelten Stellung versetzbar ist.Pressing device for mass-containing container (12) with at least one piston rod (16), which has along its longitudinal extent a tooth profiling (17), and
with a drive unit (21, 41) for the at least one piston rod (16) with a drive (22) and with at least one toothed wheel driven by the drive (22) meshing with the tooth profiling (17) of the at least one piston rod (16) (24; 44), characterized in that
the at least one toothed wheel (24; 44) can be displaced from a first position coupled to the tooth profiling (17) of the at least one piston rod (16) into a position decoupled from the tooth profiling (17) of the at least one piston rod (16). Auspressvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Antriebseinheit (21; 41) mit dem zumindest einen Zahnrad (24; 44) zur Kopplung und Entkopplung des Zahnrades (24) mit der Zahnprofilierung (17) der zumindest einen Kolbenstange (16) versetzbar ist.A squeezing device according to claim 1, characterized in that the drive unit (21; 41) can be displaced with the at least one toothed wheel (24; 44) for coupling and decoupling the toothed wheel (24) with the tooth profile (17) of the at least one piston rod (16) , Auspressvorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass die Antriebseinheit (21) eine parallel zur Rotationsachse (25) des Zahnrades (24) verlaufende Drehachse (26) aufweist, um welche die Antriebseinheit (21) drehbar ist.Squeezing device according to claim 2, characterized in that the drive unit (21) has a rotation axis (26) running parallel to the axis of rotation (25) of the gearwheel (24) about which the drive unit (21) is rotatable. Auspressvorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das zumindest eine Zahnrad (44) entlang der Rotationsachse (45) des Zahnrades (44) axial versetzbar ist.Squeezing device according to claim 1 or 2, characterized in that the at least one gear (44) along the axis of rotation (45) of the gear (44) is axially displaceable. Auspressvorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass ein Betätigungselement (28; 48) zum Versetzen des zumindest einen Zahnrades (24; 44) vorgesehen ist.Squeezing device according to one of claims 1 to 4, characterized in that an actuating element (28; 48) for displacing the at least one gear (24; 44) is provided. Auspressvorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass das zumindest eine Zahnrad (24; 44) entgegen eine Federkraft eines Federelementes (30; 50) versetzbar ist.Squeezing device according to one of claims 1 to 5, characterized in that the at least one gear (24; 44) against a spring force of a spring element (30; 50) is displaceable. Auspressvorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass ein Sperrhebel (30; 50) zum lösbaren Arretieren des zumindest einen Zahnrades (24; 44) in der von der Kolbenstange (16) entkoppelten Stellung vorgesehen ist.Squeezing device according to one of claims 1 to 5, characterized in that a locking lever (30; 50) for releasably locking the at least one gear (24; 44) in the position decoupled from the piston rod (16) is provided.
EP08105506A 2007-10-15 2008-10-07 Dispensing device Not-in-force EP2050510B1 (en)

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DE102007000502A DE102007000502A1 (en) 2007-10-15 2007-10-15 squeezing

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EP2050510B1 EP2050510B1 (en) 2011-11-23

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US (1) US8141745B2 (en)
EP (1) EP2050510B1 (en)
JP (1) JP2009096556A (en)
CN (1) CN101412458B (en)
AT (1) ATE534471T1 (en)
AU (1) AU2008203835B8 (en)
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GB0915002D0 (en) 2009-08-28 2009-09-30 3M Innovative Properties Co Device for dispensing a dental material
DE102009041825A1 (en) * 2009-09-18 2011-03-24 Hilti Aktiengesellschaft squeezing
CN104722459B (en) * 2015-03-31 2017-03-08 许江永 Glass glue gun
CN110201852A (en) * 2019-06-23 2019-09-06 扬州昌祥新材料有限公司 A kind of base station 5G aluminum veneer installation colloid-injecting gun
CN113911539B (en) * 2020-07-10 2022-10-18 宁化县旺达生态农业有限公司 Single-hand squeezing device for ointment packing tube

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US8141745B2 (en) 2012-03-27
AU2008203835B2 (en) 2010-09-16
AU2008203835B8 (en) 2011-03-17
ATE534471T1 (en) 2011-12-15
CA2638859A1 (en) 2009-04-15
US20090095772A1 (en) 2009-04-16
AU2008203835A1 (en) 2009-04-30
CN101412458A (en) 2009-04-22
CN101412458B (en) 2012-05-02
JP2009096556A (en) 2009-05-07
DE102007000502A1 (en) 2009-04-16
EP2050510B1 (en) 2011-11-23

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