EP2445652B1 - Clamping tool in the form of a cartridge discharging device - Google Patents

Clamping tool in the form of a cartridge discharging device Download PDF

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Publication number
EP2445652B1
EP2445652B1 EP10722371.1A EP10722371A EP2445652B1 EP 2445652 B1 EP2445652 B1 EP 2445652B1 EP 10722371 A EP10722371 A EP 10722371A EP 2445652 B1 EP2445652 B1 EP 2445652B1
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EP
European Patent Office
Prior art keywords
clamping
spring
cartridge
cartridge tube
movement
Prior art date
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Application number
EP10722371.1A
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German (de)
French (fr)
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EP2445652A1 (en
Inventor
Zbigniew Noniewicz
Hans-Jürgen Schüller
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Wolfcraft GmbH
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Wolfcraft GmbH
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Publication of EP2445652A1 publication Critical patent/EP2445652A1/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05CAPPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C17/00Hand 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
    • B05C17/005Hand 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
    • B05C17/01Hand 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05CAPPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C17/00Hand 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
    • B05C17/005Hand 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
    • B05C17/01Hand 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
    • B05C17/0116Hand 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 characterised by the piston driving means
    • B05C17/012Stepwise advancing mechanism, e.g. pawl and ratchets
    • B05C17/0123Lever actuated
    • B05C17/0126Lever actuated comprising an element, e.g. an arc compensating element, articulated at one end on the lever and at the other end on the piston rod driving means, e.g. a pawl

Definitions

  • the invention relates to a device for expressing a particular pasty mass from a substantially cylindrical cartridge by propelling a piston in a cartridge tube in the direction of an outlet opening, with a base on which the outlet opening opposite the end of the cartridge tube is placed and with clamping pieces, the Press by spring force at the level of the base against the outer wall of the end of the cartridge tube.
  • Such a cartridge ejection device is known from EP 1 034 847 A2 ,
  • the basic housing which supports a propulsion lever which can be pivoted against a handle in order to displace a punch located at the end of a push rod into the cartridge tube of a cartridge in order to drive the piston arranged there in the direction of an outlet opening, has a base on which the End of the cartridge tube is attachable.
  • the base is surrounded by a plurality of radially inwardly directed claws having spring ring.
  • the claws of the spring ring dig into the outer circumferential surface of the cartridge tube at the level of the base. It is provided an axially displaceable release slide to relocate the claws from its engaged position to the outer wall of the cartridge tube, so that the cartridge tube can be removed from the base.
  • a similar device discloses the WO 2005/097354 ,
  • a clamping jaw in the form of a punch in order to advance the piston of the cartridge in the direction of the outlet opening.
  • the push rod is advanced in a clamping direction by means of a stepping gear, which has a driving lever and a driving plate. After the respective stroke in the clamping direction, the push rod of a Backstop inhibited against reverse displacement in the opposite direction. By means of a release lever, the reverse lock can be shifted from its locked position.
  • clamping elements acting on the inner wall of the cartridge tube are provided.
  • the DE 299 03 910 U1 also describes a cartridge ejecting device in which the end of the cartridge tube opposite the outlet opening is fastened to the base body. This is done here by means of a clamp.
  • the US2004024361 describes a cartridge ejecting device according to the preamble of claim 1. The invention has for its object to further develop the generic device nutzsvorteilhaft.
  • the clamping pieces engage at two diametrically opposite locations on the cartridge tube.
  • the bondage is thus only at two opposite locations.
  • the clamping pieces are arranged at the ends of each acted upon by a spring in a clamping position actuating lever.
  • the actuating lever can be designed multiarm and in particular two armed.
  • the two axes of rotation of the actuating lever are parallel to each other.
  • the basic housing may have two diametrically opposed chambers, in which the actuating levers are mounted. Two arms of an actuating lever are formed and are in particular in a 180 ° stretched position one behind the other, that they close the chamber to the outside.
  • One arm of the operating lever forms an actuating arm which is to be displaced to displace the clamping piece in the housing inward direction. This is done against the restoring force of a compression spring, located on the actuating arm and on the ground a bearing opening of the base housing is supported.
  • a compression spring located on the actuating arm and on the ground a bearing opening of the base housing is supported.
  • the two actuating arms of the actuating lever must be shifted towards each other.
  • the projecting at an obtuse angle of the actuating arm clamping arms of the actuating lever each carry trained by a metal plate clamping pieces.
  • the clamping pieces have cutting edges extending on a circular arc, which lie in an inclined position in the clamping position on the outer wall of the cartridge tube.
  • the abutment for the clamping force is formed by a jacket wall of the base. This has in the area in which the cartridge tube is acted upon by the cutting edge, a circular arc-shaped outline.
  • the outline contour of the base is adapted in this area the course of the inner wall of the cartridge tube.
  • the cartridge tube can be deformed by the diametrically opposite clamping pieces to an oval shape, since it is acted upon only by two diagonally opposite points of the clamping pieces.
  • the base is preferably formed by a ring structure which is flattened at opposite points.
  • the base has a passage opening through which the push rod protrudes.
  • a punch which acts on the piston of the cartridge.
  • a punch By pressure on the piston stored within the cartridge tube between the piston and outlet opening pasty mass is compressed and pressed out through an outlet opening formed by a spout.
  • a stepping gear is provided, which has a propulsion lever, which is mounted pivotably about an axis of rotation on the base housing and to achieve a pumping movement in the direction of a handle is displaced.
  • a drive arm of the drive lever engages a driver, which may be a driver plate. This gets in a tilted clamping position to the push rod and is taking the push rod against the restoring force of a return spring in a Forward clamping direction.
  • a locking plate backpressure which is supported at one end to a housing-fixed support stop.
  • a return spring At the opposite end of the clamping piece is acted upon by a return spring and held by this in a clamping position on the push rod.
  • the push rod In the forward displacement, the push rod can slide through an opening in the clamping plate.
  • a release lever In order to release the reverse lock, a release lever must be pivoted, which engages with an actuating shoulder on the acted upon by the return spring end of the clamping piece to bring the latter from the clamping position.
  • a second aspect of the invention relates to the development of the above-described non-return device on a clamping tool, in particular in the form of a cartridge ejecting device with a at the end of a slidably mounted in a base rod, in particular push rod arranged clamping jaw, in particular in the form of a punch, by means of a stepping gear in a Clamping direction is vorverlagerbar and with a releasable stuntsperre to inhibit a backward displacement of the rod in the opposite direction.
  • the non-return after a forward displacement occurs only after a slight shift back into effect.
  • the clamping tool is a cartridge ejecting device.
  • the stamp compresses the pasty mass stored in the cartridge and presses it out of the outlet opening. If the driver described above relieved by reducing a driving force on the propulsion lever, the force of the compressed mass causes a slight return displacement of the punch or the push rod, before their displacement is inhibited by the remindd Wegsperre. This may result in the cartridge relax compressed pasty mass, so that dripping from the outlet opening is prevented.
  • the locking member of the reverse lock may be spaced after the displacement of a support stop.
  • the support stop on which the locking member is supported for the development of its inhibition position, may be adjacent to a movement end stop in the forward displacement direction. Against thisthsendanschlag the locking member can strike when it is dragged in the forward displacement of the push rod in the clamping direction by a small distance. This can be done simultaneously with a compression of the return spring.
  • the locking member is acted upon in the clamping direction of a propulsion spring in the region of the support stop and theorientsendanschlages and that this propulsion spring develops a greater spring force than the return spring, so that the locking member is permanently applied to theabsolusendanschlag.
  • FIGS. 1 to 9 illustrated embodiment has a Plastic-made base body 6, which has at its front end an insertion opening 38 for insertion of a cartridge tube 1 of a filled with a pasty mass cartridge.
  • a piston 2 Inside the cartridge tube 1 is a piston 2.
  • On the opposite side of the piston 2 forms the cartridge with a spout 5 an outlet opening 4, through which by pressure on the piston 2 a stored within the cartridge pasty mass 3 can be pressed out.
  • annular base 21 is provided in the region of the bottom of the insertion opening 38.
  • the wall of the insertion opening 38 is formed by an inner cylinder.
  • Two diagonally opposite areas of the base 21 are formed by a running on a circular arc contour line webs having radially inwardly extending support ribs 26.
  • the course of the wall 22 of the base 21 corresponds there to the inner contour of the cartridge tube 1.
  • the base 21 On two diagonally opposite sides, on which no clamping means are provided, the base 21 has flats 21 '.
  • a guide opening 23 In the center of the base 21 is a guide opening 23, in which a push rod 12 is mounted. This carries at its front, projecting into the insertion opening 38 a punch 13, with which the piston 2 can be acted upon in a clamping direction. With a below-described stepping gear, the push rod 12 can be gradually shifted in the clamping direction. It is inhibited with a rinsed Wegsperre also described below on a return displacement.
  • the housing 6 Based on the push rod 12, the housing 6 forms two diametrically opposite chambers 36 which are adjacent to the insertion opening 38.
  • the chambers extend parallel to the insertion opening 38.
  • an actuating lever 27 is mounted in each of the two chambers 36.
  • Each actuating lever 27 forms a projecting in the opening direction of the insertion 38 actuating arm 28.
  • the actuating arms 28 can be displaced towards each other. This is done against the restoring force of a compression spring 29, which is supported on the bottom of a cup-shaped opening 34.
  • the other end of the compression spring 29 acts on the underside of the actuating arm 28.
  • the actuating lever 27 In a 180 ° extension direction to the actuating arm 28, the actuating lever 27 has a locking arm 37. With the actuating arm 28 and the locking arm 37, the chamber 36 is closed to the outside.
  • a clamping arm 30 protrudes from the back of the lever pair 28, 37 .
  • the metal plate extends obliquely to the displacement direction of the push rod 12 and has at its free end a running on a curved line cutting edge 32.
  • the compression spring 29 exerts a force that obliquely the cutting edge 32 acted upon in the outer wall of the cartridge tube 1. Because of the inclination of the cutting edge 32 having the clamping piece 31, the blade digs in a train on the cartridge, which takes place by a forward displacement of the punch 13, in the outer wall of the cartridge tube 1 a.
  • the actuating arm 28 does not need to be actuated. Because of the inclination of the clamping piece 31, it is at Inserting a new cartridge into the insertion opening 38 is displaced from the end edge of the end 1 'of the cartridge tube 1.
  • the above-mentioned stepping gear consists of a propulsion lever 8, which is mounted to a housing-fixed axis 24 on the base housing 6.
  • the propulsion lever 8 can be pivoted by the fingers of a hand 7 comprehensive hand in the direction of the handle 7.
  • a drive arm of the drive lever 8 moves in the opposite direction and acts on the edge region of a carrier mounted in a bearing chamber 39 10.
  • the driver 10 is a metal plate with a sharp-edged opening 10 ', which is penetrated by the push rod 12.
  • a likewise restrained by the push rod 12 return spring 11 acts on the driver 10 and holds it in a normal position in which the push rod 12 can slide freely through the opening 10 'of the driver 10.
  • the attack of the drive arm 9 at the edge of the driver 10 causes a tilting of the driver 10, so that the sharp edges of the opening 10 engage in the outer wall of the push rod 12.
  • the push rod 12 is thereby coupled in motion with the driver 10 and is entrained by the driver 10 against the restoring force of the return spring 11 in the clamping direction.
  • the seated at the end of the push rod 12 punch 13 acts on the piston 2 of the cartridge.
  • a likewise formed by a steel sheet locking member 16 is moved with.
  • an edge portion of the locking member 16 is supported on a movement end stop 20 of the base body 6, which is assigned to the side of the locking member 16, which faces away from the opening 16 'of the return spring 17.
  • the locking plate 16 If the locking plate 16 is displaced to its stop position on the support stop 19, acts on the locking plate 16, a torque which is maintained in particular by the return spring 17, but also by a force acting on the push rod 12 force. Since the push rod 12 is in clamping position in the opening 16 ', it can not be displaced counter to the feed direction.
  • This non-return position is in the FIG. 8 shown.
  • the release lever 14 is thereby pivoted about its pivot axis 25, so that the acted upon by the return spring 17 edge portion of the locking member 16 is displaced by an actuating shoulder 15.
  • the return spring 17 is tensioned and the locking member 16 is pivoted about the support stop 19 until the push rod 12 can pass freely through the opening 16 '.
  • a propelling spring 18 acts on the locking member 16.
  • the effective direction of the advancing spring 18 is opposite to the direction of action of the return spring 17 and acts on the locking member 16 in the direction of the movement end stop 20. Is the spring force the advancing spring 18 is greater than the spring force of the return spring 17, so the locking member 16 is permanently on thehovsendanschlag 20 at. By exerting a pressure on the push rod 12 against the clamping direction, the push rod can therefore be shifted back as far as the amount of movement against the tension direction until the locking member 16 strikes the support stop 19.
  • the push rod 12 is not held in the end position of the stroke after completion of a propulsion stroke by the propulsion lever 8. Rather, the push rod is actively shifted back into the restocked position by the force of the restoring spring 17.
  • the punch 13 is displaced by a not shown displaceable by an electric drive 40 telescopic push device.
  • 6 batteries and a rotationally driven by a drive motor gear are provided within the body.
  • the motor starts its rotation, which is accompanied by a linear displacement of the plunger 13, not shown, when a button 41, which is arranged in a handle 7 associated with a handle opening, is actuated.
  • a level indicator which is formed by a guided in a slot 46 of the housing 6 pointer 45. Along the slot 46, a scale 44 is provided.
  • the cartridge is held by a clamping device which corresponds to that in the FIGS. 1 to 9 is provided on a hand-operated squeezing device and which has been described in detail above.

Description

Die Erfindung betrifft eine Vorrichtung zum Ausdrücken einer insbesondere pastösen Masse aus einer im wesentlichen zylindrischen Kartusche durch Vorantreiben eines Kolbens in einem Kartuschenrohr in Richtung auf eine Austrittsöffnung, mit einem Sockel, auf dem das der Austrittsöffnung gegenüberliegende Ende des Kartuschenrohres aufsetzbar ist und mit Klemmstücken, die durch Federkraft auf Höhe des Sockels gegen die Außenwandung des Endes des Kartuschenrohres drücken.The invention relates to a device for expressing a particular pasty mass from a substantially cylindrical cartridge by propelling a piston in a cartridge tube in the direction of an outlet opening, with a base on which the outlet opening opposite the end of the cartridge tube is placed and with clamping pieces, the Press by spring force at the level of the base against the outer wall of the end of the cartridge tube.

Eine derartige Kartuschenausdrückvorrichtung ist bekannt aus der EP 1 034 847 A2 . Das Grundgehäuse, welches einen Vortriebshebel lagert, der gegen einen Handgriff verschwenkt werden kann, um einen am Ende einer Schubstange sitzenden Stempel in das Kartuschenrohr einer Kartusche zu verlagern, um den dort angeordneten Kolben in Richtung einer Austrittsöffnung voranzutreiben, besitzt einen Sockel, auf den das Ende des Kartuschenrohres aufsteckbar ist. Der Sockel wird von einem eine Vielzahl radial einwärts gerichteter Krallen aufweisenden Federring umgeben. Die Krallen des Federrings graben sich in die Außenmantelfläche des Kartuschenrohres auf Höhe des Sockels ein. Es ist ein in Axialrichtung verlagerbarer Löseschieber vorgesehen, um die Krallen aus ihrer Eingriffsstellung zur Außenwandung des Kartuschenrohres zurückzuverlagern, damit das Kartuschenrohr vom Sockel abgezogen werden kann.Such a cartridge ejection device is known from EP 1 034 847 A2 , The basic housing, which supports a propulsion lever which can be pivoted against a handle in order to displace a punch located at the end of a push rod into the cartridge tube of a cartridge in order to drive the piston arranged there in the direction of an outlet opening, has a base on which the End of the cartridge tube is attachable. The base is surrounded by a plurality of radially inwardly directed claws having spring ring. The claws of the spring ring dig into the outer circumferential surface of the cartridge tube at the level of the base. It is provided an axially displaceable release slide to relocate the claws from its engaged position to the outer wall of the cartridge tube, so that the cartridge tube can be removed from the base.

Eine ähnliche Vorrichtung offenbart die WO 2005/097354 . Bei der dort beschriebenen Spannvorrichtung sitzt am Ende einer in einem Grundkörper verschieblich gelagerten Stange eine Spannbacke in Form eines Stempels, um den Kolben der Kartusche in Richtung der Austrittsöffnung voranzutreiben. Die Schubstange wird mittels eines Schrittschaltgetriebes, welches einen Vortriebshebel und eine Mitnehmerplatte aufweist, in einer Spannrichtung vorverlagert. Nach dem jeweiligen Hub in Spannrichtung wird die Schubstange von einer Rückdrücksperre gegen eine Rückverlagerung in Gegenrichtung gehemmt. Mittels eines Lösehebels kann die Rückdrücksperre aus ihrer Sperrstellung verlagert werden. Um das rückwärtige Ende des Kartuschenrohres am Grundkörper zu halten, sind an der Innenwandung des Kartuschenrohres angreifende Klemmelemente vorgesehen.A similar device discloses the WO 2005/097354 , In the clamping device described therein sits at the end of a displaceably mounted in a base rod, a clamping jaw in the form of a punch in order to advance the piston of the cartridge in the direction of the outlet opening. The push rod is advanced in a clamping direction by means of a stepping gear, which has a driving lever and a driving plate. After the respective stroke in the clamping direction, the push rod of a Backstop inhibited against reverse displacement in the opposite direction. By means of a release lever, the reverse lock can be shifted from its locked position. In order to hold the rear end of the cartridge tube on the base body, clamping elements acting on the inner wall of the cartridge tube are provided.

Die DE 299 03 910 U1 beschreibt ebenfalls eine Kartuschenausdrückvorrichtung, bei der das der Austrittsöffnung gegenüberliegende Ende des Kartuschenrohres am Grundkörper befestigt ist. Dies erfolgt hier mittels einer Klemmschelle. Die US2004024361 beschreibt eine Kartuschenausdrückvorrichtung gemäß dem Oberbegriff des Anspruchs 1. Der Erfindung liegt die Aufgabe zugrunde, die gattungsgemäße Vorrichtung gebrauchsvorteilhaft weiterzubilden.The DE 299 03 910 U1 also describes a cartridge ejecting device in which the end of the cartridge tube opposite the outlet opening is fastened to the base body. This is done here by means of a clamp. The US2004024361 describes a cartridge ejecting device according to the preamble of claim 1. The invention has for its object to further develop the generic device nutzsvorteilhaft.

Gelöst wird die Aufgabe durch die in den Ansprüchen angegebene Erfindung. Gemäß einem ersten Aspekt der Erfindung ist vorgesehen, dass die Klemmstücke an zwei sich diametral gegenüberliegenden Stellen am Kartuschenrohr angreifen. Die Fesselung erfolgt somit nur an zwei sich gegenüberliegenden Orten. Die Klemmstücke sind an den Enden jeweils eines von einer Feder in eine Klemmstellung beaufschlagten Betätigungshebels angeordnet. Die Betätigungshebel können mehrarmig und insbesondere zweiarmig gestaltet sein. Die beiden Drehachsen der Betätigungshebel verlaufen parallel zueinander. Das Grundgehäuse kann zwei diametral gegenüberliegende Kammern aufweisen, in denen die Betätigungshebel gelagert sind. Zwei Arme eines Betätigungshebels sind so ausgebildet und liegen insbesondere in einer 180°-Gestrecktlage hintereinander, dass sie die Kammer nach außen hin verschließen. Ein Arm des Betätigungshebels bildet einen Betätigungsarm, der zu Verlagerung des Klemmstücks in Gehäuseeinwärtsrichtung zu verlagern ist. Dies erfolgt gegen die Rückstellkraft einer Druckfeder, die sich am Betätigungsarm und am Boden einer Lageröffnung des Grundgehäuses abstützt. Zum Lösen der Klemmstellung müssen die beiden Betätigungsarme der Betätigungshebel aufeinander zu verlagert werden. Die in einem stumpfen Winkel vom Betätigungsarm abragenden Klemmarme der der Betätigungshebel tragen jeweils von einer Metallplatte ausgebildete Klemmstücke. Die Klemmstücke besitzen sich auf einer Kreisbogenlinie erstreckende Schneiden, die in der Klemmstellung an der Außenwandung des Kartuschenrohres in einer Schrägstellung anliegen. Wird auf die Kartusche ein Zug ausgeübt, so graben sich die Schneiden tiefer in die Außenwandung des Kartuschenrohres. Das Widerlager für die Klemmkraft wird von einer Mantelwandung des Sockels ausgebildet. Dieser besitzt in dem Bereich, in dem das Kartuschenrohr von der Schneide beaufschlagt wird, eine kreisbogenförmige Grundrisslinie. Die Umrisskontur des Sockels ist in diesem Bereich dem Verlauf der Innenwandung des Kartuschenrohres angepasst. Das Kartuschenrohr kann sich durch die sich diametral gegenüberliegenden Klemmstücke zu einer Ovalform verformen, da es ausschließlich von zwei sich diagonal gegenüberliegenden Stellen von den Klemmstücken beaufschlagt wird. Der Sockel wird vorzugsweise von einer Ringstruktur ausgebildet, die an sich gegenüberliegenden Stellen abgeflacht ist. Der Sockel besitzt eine Durchtrittsöffnung, durch die die Schubstange hindurchragt. Auf dem freien Ende der Schubstange sitzt ein Stempel, der den Kolben der Kartusche beaufschlagt. Durch Druck auf den Kolben wird die innerhalb des Kartuschenrohres zwischen Kolben und Austrittsöffnung bevorratete pastöse Masse komprimiert und durch eine von einer Tülle gebildeten Austrittsöffnung herausgepresst. Zum Antrieb der Schubstange ist ein Schrittschaltgetriebe vorgesehen, welches einen Vortriebshebel besitzt, der um ein Drehachse schwenkbar am Grundgehäuse gelagert ist und zur Erzielung einer Pumpbewegung in Richtung auf einen Handgriff verlagerbar ist. Dabei greift ein Antriebsarm des Vortriebshebels an einem Mitnehmer an, bei dem es sich um eine Mitnehmerplatte handeln kann. Diese gerät in eine verkippte Klemmlage zur Schubstange und wird unter Mitnahme der Schubstange gegen die Rückstellkraft einer Rückstellfeder in eine Spannrichtung vorverlagert. Im Grundkörper befindet sich zudem eine von einer Sperrplatte ausgebildete Rückdrücksperre, die sich an einem Ende an einem gehäusefesten Stützanschlag abstützt. An dem gegenüberliegenden Ende wird das Klemmstück von einer Rückstellfeder beaufschlagt und von dieser in einer Klemmstellung auf der Schubstange gehalten. Bei der Vorverlagerung kann die Schubstange durch eine Öffnung der Klemmplatte hindurch gleiten. Um die Rückdrücksperre zu lösen, muss ein Lösehebel verschwenkt werden, der mit einer Betätigungsschulter an dem von der Rückstellfeder beaufschlagten Ende des Klemmstücks angreift, um Letzteres aus der Klemmstellung zu bringen.The object is achieved by the invention specified in the claims. According to a first aspect of the invention it is provided that the clamping pieces engage at two diametrically opposite locations on the cartridge tube. The bondage is thus only at two opposite locations. The clamping pieces are arranged at the ends of each acted upon by a spring in a clamping position actuating lever. The actuating lever can be designed multiarm and in particular two armed. The two axes of rotation of the actuating lever are parallel to each other. The basic housing may have two diametrically opposed chambers, in which the actuating levers are mounted. Two arms of an actuating lever are formed and are in particular in a 180 ° stretched position one behind the other, that they close the chamber to the outside. One arm of the operating lever forms an actuating arm which is to be displaced to displace the clamping piece in the housing inward direction. This is done against the restoring force of a compression spring, located on the actuating arm and on the ground a bearing opening of the base housing is supported. To release the clamping position, the two actuating arms of the actuating lever must be shifted towards each other. The projecting at an obtuse angle of the actuating arm clamping arms of the actuating lever each carry trained by a metal plate clamping pieces. The clamping pieces have cutting edges extending on a circular arc, which lie in an inclined position in the clamping position on the outer wall of the cartridge tube. If a pull is exerted on the cartridge, the blades dig deeper into the outer wall of the cartridge tube. The abutment for the clamping force is formed by a jacket wall of the base. This has in the area in which the cartridge tube is acted upon by the cutting edge, a circular arc-shaped outline. The outline contour of the base is adapted in this area the course of the inner wall of the cartridge tube. The cartridge tube can be deformed by the diametrically opposite clamping pieces to an oval shape, since it is acted upon only by two diagonally opposite points of the clamping pieces. The base is preferably formed by a ring structure which is flattened at opposite points. The base has a passage opening through which the push rod protrudes. On the free end of the push rod sits a punch, which acts on the piston of the cartridge. By pressure on the piston stored within the cartridge tube between the piston and outlet opening pasty mass is compressed and pressed out through an outlet opening formed by a spout. To drive the push rod, a stepping gear is provided, which has a propulsion lever, which is mounted pivotably about an axis of rotation on the base housing and to achieve a pumping movement in the direction of a handle is displaced. In this case, a drive arm of the drive lever engages a driver, which may be a driver plate. This gets in a tilted clamping position to the push rod and is taking the push rod against the restoring force of a return spring in a Forward clamping direction. In the main body there is also a formed by a locking plate backpressure, which is supported at one end to a housing-fixed support stop. At the opposite end of the clamping piece is acted upon by a return spring and held by this in a clamping position on the push rod. In the forward displacement, the push rod can slide through an opening in the clamping plate. In order to release the reverse lock, a release lever must be pivoted, which engages with an actuating shoulder on the acted upon by the return spring end of the clamping piece to bring the latter from the clamping position.

Ein zweiter Aspekt der Erfindung betrifft die Weiterbildung der zuvor beschriebenen Rückdrücksperre an einem Spannwerkzeug, insbesondere in Form einer Kartuschenausdrückvorrichtung mit einer am Ende einer in einem Grundkörper verschieblich gelagerten Stange, insbesondere Schubstange angeordneten Spannbacke, insbesondere in Form eines Stempels, die mittels eines Schrittschaltgetriebes in einer Spannrichtung vorverlagerbar ist und mit einer lösbaren Rückdrücksperre zur Hemmung einer Rückverlagerung der Stange in Gegenrichtung.A second aspect of the invention relates to the development of the above-described non-return device on a clamping tool, in particular in the form of a cartridge ejecting device with a at the end of a slidably mounted in a base rod, in particular push rod arranged clamping jaw, in particular in the form of a punch, by means of a stepping gear in a Clamping direction is vorverlagerbar and with a releasable Rückdrücksperre to inhibit a backward displacement of the rod in the opposite direction.

Zur Lösung der eingangs genannten Aufgabe ist hier vorgesehen, dass die Rückdrücksperre nach einer Vorverlagerung erst nach einer geringfügigen Rückverlagerung in Wirkung tritt. Dies ist insbesondere dann von Vorteil, wenn es sich bei dem Spannwerkzeug um eine Kartuschenausdrückvorrichtung handelt. Der Stempel komprimiert die in der Kartusche bevorratete pastöse Masse und drückt sie aus der Austrittsöffnung heraus. Wird der oben beschriebene Mitnehmer durch Verminderung einer Antriebskraft am Vortriebshebel entlastet, so bewirkt die Kraft der komprimierten Masse eine geringfügige Rückverlagerung des Stempels bzw. der Schubstange, bevor deren Verlagerung von der Rückdrücksperre gehemmt ist. Hierdurch kann sich die in der Kartusche komprimierte pastöse Masse entspannen, so dass ein Nachtropfen aus der Austrittsöffnung verhindert wird. Das Sperrglied der Rückdrücksperre kann nach der Verlagerung von einem Stützanschlag beabstandet sein. Erst nach Beendigung der Vorverlagerung kann durch Druck auf die Spannbacke, also den Stempel die Stange bis in eine Anlagestellung des Sperrgliedes an den Stützanschlag zurückverlagert werden. Dem Stützanschlag, an dem sich das Sperrglied zur Entfaltung seiner Hemmstellung abstützt, kann in Vorverlagerungsrichtung ein Bewegungsendanschlag benachbart sein. Gegen diesen Bewegungsendanschlag kann das Sperrglied anschlagen, wenn es bei der Vorverlagerung der Schubstange in Spannrichtung um eine geringe Wegstrecke mitgeschleppt wird. Dies kann gleichzeitig mit einer Kompression der Rückstellfeder erfolgen. Es ist aber auch vorgesehen, dass das Sperrglied im Bereich des Stützanschlages bzw. des Bewegungsendanschlages in Spannrichtung von einer Vortriebsfeder beaufschlagt wird und dass diese Vortriebsfeder eine größere Federkraft entwickelt als die Rückstellfeder, so dass das Sperrglied permanent am Bewegungsendanschlag anliegt. Auch bei dieser Variante ist es möglich, nach Beendigung des Vortriebes durch Betätigung des Vortriebshebels den Stempel bzw. die Schubstange geringfügig zurückzuverlagern. Mit einem bezogen auf die Vortriebsrichtung der Stange vor dem Handgriff bzw. dem Vortriebshebel sitzenden Lösehebel kann ein Randabschnitt des Sperrgliedes in die Lösestellung beaufschlagt werden, welcher Randabschnitt dem Randabschnitt gegenüberliegt, der sich mit Bewegungsspiel zwischen Bewegungsendanschlag und Stützanschlag befindet.To solve the aforementioned problem is provided here that the non-return after a forward displacement occurs only after a slight shift back into effect. This is particularly advantageous when the clamping tool is a cartridge ejecting device. The stamp compresses the pasty mass stored in the cartridge and presses it out of the outlet opening. If the driver described above relieved by reducing a driving force on the propulsion lever, the force of the compressed mass causes a slight return displacement of the punch or the push rod, before their displacement is inhibited by the Rückdrücksperre. This may result in the cartridge relax compressed pasty mass, so that dripping from the outlet opening is prevented. The locking member of the reverse lock may be spaced after the displacement of a support stop. Only after completion of the forward displacement can be shifted back to an abutment position of the locking member to the support stop by pressure on the jaw, so the punch the rod. The support stop, on which the locking member is supported for the development of its inhibition position, may be adjacent to a movement end stop in the forward displacement direction. Against this Bewegungsendanschlag the locking member can strike when it is dragged in the forward displacement of the push rod in the clamping direction by a small distance. This can be done simultaneously with a compression of the return spring. But it is also envisaged that the locking member is acted upon in the clamping direction of a propulsion spring in the region of the support stop and the Bewegungsendanschlages and that this propulsion spring develops a greater spring force than the return spring, so that the locking member is permanently applied to the Bewegungsendanschlag. Also in this variant, it is possible to shift the punch or the push rod slightly after completion of the propulsion by pressing the propulsion lever. With a relation to the direction of advance of the rod before the handle or the propulsion lever sitting release lever, an edge portion of the locking member can be acted upon in the release position, which edge portion opposite the edge portion, which is located with movement play between movement end stop and support stop.

Ein Ausführungsbeispiel der Erfindung wird nachfolgend anhand beigefügter Zeichnungen erläutert. Es zeigen:

Fig. 1
in perspektivischer Darstellung ein Ausführungsbeispiel einer Kartuschenausdrückvorrichtung;
Fig. 2
einen Schnitt gemäß der Schnittlinie II - II in Figur 1;
Fig. 3
eine Explosionsdarstellung der wesentlichen Elemente der Kartuschenausdrückvorrichtung;
Fig. 4
eine weitere perspektivische Darstellung der Kartuschenausdrückvorrichtung im Bereich einer Einstecköffnung 38 für ein Kartuschenrohr 1 einer Kartusche;
Fig. 5
einen Schnitt gemäß der Linie V - V in Fig. 4, wobei das Ende eines Kartuschenrohres 1 in einer Klemmstellung gehalten ist;
Fig. 5a
eine Darstellung gemäß Fig. 5, wobei das Kartuschenrohr freigegeben worden ist;
Fig. 6
einen Schnitt gemäß der Linie VI - VI in Fig. 5a;
Fig. 7
eine Darstellung gemäß Fig. 2 mit in Vortriebsrichtung betätigtem Vortriebshebel 8;
Fig. 8
eine Folgedarstellung gemäß Fig. 7, wobei der Stempel 13 bzw. die Schubstange 12 geringfügig bis in eine Hemmstellung zurückverlagert worden ist;
Fig. 9
eine Darstellung gemäß Fig. 2 mit in Freigabestellung gebrachter Rückdrücksperre und
Fig. 10
ein zweites Ausführungsbeispiel.
An embodiment of the invention will be explained below with reference to accompanying drawings. Show it:
Fig. 1
in perspective view an embodiment of a cartridge ejecting device;
Fig. 2
a section along the section line II - II in FIG. 1 ;
Fig. 3
an exploded view of the essential elements of the cartridge ejecting device;
Fig. 4
a further perspective view of the cartridge ejecting device in the region of an insertion opening 38 for a cartridge tube 1 of a cartridge;
Fig. 5
a section along the line V - V in Fig. 4 wherein the end of a cartridge tube 1 is held in a clamping position;
Fig. 5a
a representation according to Fig. 5 wherein the cartridge tube has been released;
Fig. 6
a section along the line VI - VI in Fig. 5a ;
Fig. 7
a representation according to Fig. 2 with propulsion lever 8 actuated in the advancing direction;
Fig. 8
a follow-up according to Fig. 7 , wherein the punch 13 and the push rod 12 has been slightly shifted back to a stop position;
Fig. 9
a representation according to Fig. 2 with brought in release position backpressure and
Fig. 10
a second embodiment.

Das in den Figuren 1 bis 9 dargestellte Ausführungsbeispiel besitzt einen aus Kunststoff gefertigten Grundkörper 6, der an seinem vorderen Ende eine Einstecköffnung 38 zum Einstecken eines Kartuschenrohres 1 einer mit einer pastösen Masse gefüllten Kartusche aufweist. Innerhalb des Kartuschenrohres 1 befindet sich ein Kolben 2. An der dem Kolben 2 gegenüberliegenden Seite bildet die Kartusche mit einer Tülle 5 eine Austrittsöffnung 4 aus, durch welche durch Druck auf den Kolben 2 eine innerhalb der Kartusche bevorratete pastöse Masse 3 herausgepresst werden kann.That in the FIGS. 1 to 9 illustrated embodiment has a Plastic-made base body 6, which has at its front end an insertion opening 38 for insertion of a cartridge tube 1 of a filled with a pasty mass cartridge. Inside the cartridge tube 1 is a piston 2. On the opposite side of the piston 2 forms the cartridge with a spout 5 an outlet opening 4, through which by pressure on the piston 2 a stored within the cartridge pasty mass 3 can be pressed out.

Zur Aufnahme des Endes 1' des Kartuschenrohres 1 ist im Bereich des Bodens der Einstecköffnung 38 ein ringförmiger Sockel 21 vorgesehen. Die Wandung der Einstecköffnung 38 wird von einem Innenzylinder ausgebildet. Zwei sich diagonal gegenüberliegende Bereiche des Sockels 21 werden von einer auf einer Kreisbogenkonturlinie verlaufenden Stege gebildet, die radial einwärts verlaufende Stützrippen 26 aufweisen. Der Verlauf der Wandung 22 des Sockels 21 entspricht dort der Innenkontur des Kartuschenrohres 1. An zwei sich diagonal gegenüberliegenden Seiten, an denen keine Klemmmittel vorgesehen sind, besitzt der Sockel 21 Abflachungen 21'.For receiving the end 1 'of the cartridge tube 1, an annular base 21 is provided in the region of the bottom of the insertion opening 38. The wall of the insertion opening 38 is formed by an inner cylinder. Two diagonally opposite areas of the base 21 are formed by a running on a circular arc contour line webs having radially inwardly extending support ribs 26. The course of the wall 22 of the base 21 corresponds there to the inner contour of the cartridge tube 1. On two diagonally opposite sides, on which no clamping means are provided, the base 21 has flats 21 '.

Im Zentrum des Sockels 21 befindet sich eine Führungsöffnung 23, in welcher eine Schubstange 12 gelagert ist. Diese trägt an ihrem vorderen, in die Einstecköffnung 38 hineinragenden Ende einen Stempel 13, mit dem der Kolben 2 in einer Spannrichtung beaufschlagt werden kann. Mit einem weiter unten noch beschreibenden Schrittschaltgetriebe kann die Schubstange 12 schrittweise in Spannrichtung verlagert werden. Sie ist dabei mit einer ebenfalls weiter unten noch beschriebenen Rückdrücksperre an einer Rückverlagerung gehemmt.In the center of the base 21 is a guide opening 23, in which a push rod 12 is mounted. This carries at its front, projecting into the insertion opening 38 a punch 13, with which the piston 2 can be acted upon in a clamping direction. With a below-described stepping gear, the push rod 12 can be gradually shifted in the clamping direction. It is inhibited with a Rückdrücksperre also described below on a return displacement.

Bezogen auf die Schubstange 12 bildet das Gehäuse 6 zwei sich diametral gegenüberliegende Kammern 36 aus, die der Einstecköffnung 38 benachbart liegen. Die Kammern erstrecken sich parallel zur Einstecköffnung 38. In jeder der beiden Kammern 36 ist ein Betätigungshebel 27 gelagert. Die beiden Drehachsen 33, um welche jeder Betätigungshebel 27 drehbar ist, verlaufen parallel zueinander. Jeder Betätigungshebel 27 bildet einen in Öffnungsrichtung der Einstecköffnung 38 ragenden Betätigungsarm 28 aus. Die Betätigungsarme 28 können aufeinander zu verlagert werden. Dies erfolgt gegen die Rückstellkraft einer Druckfeder 29, die sich auf dem Boden einer topfförmigen Öffnung 34 abstützt. Das andere Ende der Druckfeder 29 beaufschlagt die Unterseite des Betätigungsarmes 28. In einer 180°-Erstreckungsrichtung zum Betätigungsarm 28 weist der Betätigungshebel 27 einen Verschlussarm 37 auf. Mit dem Betätigungsarm 28 und dem Verschlussarm 37 ist die Kammer 36 nach außen geschlossen.Based on the push rod 12, the housing 6 forms two diametrically opposite chambers 36 which are adjacent to the insertion opening 38. The chambers extend parallel to the insertion opening 38. In each of the two chambers 36, an actuating lever 27 is mounted. The two axes of rotation 33, about which each operating lever 27 is rotatable, run parallel to each other. Each actuating lever 27 forms a projecting in the opening direction of the insertion 38 actuating arm 28. The actuating arms 28 can be displaced towards each other. This is done against the restoring force of a compression spring 29, which is supported on the bottom of a cup-shaped opening 34. The other end of the compression spring 29 acts on the underside of the actuating arm 28. In a 180 ° extension direction to the actuating arm 28, the actuating lever 27 has a locking arm 37. With the actuating arm 28 and the locking arm 37, the chamber 36 is closed to the outside.

Von der Rückseite des Hebelpaares 28, 37 ragt ein Klemmarm 30 ab. Am Ende dieses Klemmarms sitzt ein aus einer Metallplatte gefertigtes Klemmstück 31. Die Metallplatte erstreckt sich schräg zur Verlagerungsrichtung der Schubstange 12 und besitzt an ihrem freien Ende eine auf einer Bogenlinie verlaufende Schneide 32. Die Druckfeder 29 übt eine Kraft aus, die die Schneide 32 schräg in die Außenwandung des Kartuschenrohres 1 beaufschlagt. Wegen der Schrägstellung des die Schneide 32 aufweisenden Klemmstücks 31 gräbt sich die Schneide bei einem Zug auf die Kartusche, was durch eine Vorverlagerung des Stempels 13 erfolgt, in die Außenwandung des Kartuschenrohres 1 ein.From the back of the lever pair 28, 37 a clamping arm 30 protrudes. The metal plate extends obliquely to the displacement direction of the push rod 12 and has at its free end a running on a curved line cutting edge 32. The compression spring 29 exerts a force that obliquely the cutting edge 32 acted upon in the outer wall of the cartridge tube 1. Because of the inclination of the cutting edge 32 having the clamping piece 31, the blade digs in a train on the cartridge, which takes place by a forward displacement of the punch 13, in the outer wall of the cartridge tube 1 a.

Das Lösen der Klemmverbindung, mit der das Kartuschenrohr 1 am Grundkörper 6 gehalten ist, ist in einer Einhandbetätigung möglich. Mit Daumen und Zeigefinger können die beiden Betätigungsarme 28 der Betätigungshebel 27 aufeinander zu verlagert werden. Mit der anderen Hand kann eine geleerte Kartusche aus der Einstecköffnung 38 herausgezogen werden.The release of the clamping connection, with which the cartridge tube 1 is held on the base body 6, is possible in a one-hand operation. With thumb and forefinger, the two actuating arms 28 of the actuating lever 27 can be displaced toward each other. With the other hand, an emptied cartridge can be pulled out of the insertion opening 38.

Zum Einstecken einer neuen Kartusche braucht der Betätigungsarm 28 nicht betätigt werden. Wegen der Schrägstellung des Klemmstückes 31 wird es beim Einstecken einer neuen Kartusche in die Einstecköffnung 38 vom Stirnrand des Endes 1' des Kartuschenrohres 1 verlagert.For inserting a new cartridge, the actuating arm 28 does not need to be actuated. Because of the inclination of the clamping piece 31, it is at Inserting a new cartridge into the insertion opening 38 is displaced from the end edge of the end 1 'of the cartridge tube 1.

Das oben bereits erwähnte Schrittschaltgetriebe besteht aus einem Vortriebshebel 8, der um eine gehäusefeste Achse 24 am Grundgehäuse 6 gelagert ist. Der Vortriebshebel 8 kann von den Fingern einer einen Handgriff 7 umfassenden Hand in Richtung auf den Handgriff 7 verschwenkt werden. Dabei bewegt sich ein Antriebsarm des Vortriebshebels 8 in Gegenrichtung und beaufschlagt den Randbereich eines in einer Lagerkammer 39 gelagerten Mitnehmers 10. Bei dem Mitnehmer 10 handelt es sich um ein Metallplättchen mit einer scharfkantigen Öffnung 10', welche von der Schubstange 12 durchgriffen ist. Eine ebenfalls von der Schubstange 12 durchgriffene Rückstellfeder 11 beaufschlagt den Mitnehmer 10 und hält ihn in einer Grundstellung, in welcher die Schubstange 12 frei durch die Öffnung 10' des Mitnehmers 10 gleiten kann. Wird der Vortriebshebel 8 verschwenkt, so bewirkt der Angriff des Antriebsarmes 9 am Rand des Mitnehmers 10 eine Verkippung des Mitnehmers 10, so dass die scharfen Kanten der Öffnung 10 in die Außenwandung der Schubstange 12 eingreifen. Die Schubstange 12 ist dadurch mit dem Mitnehmer 10 bewegungsgekoppelt und wird vom Mitnehmer 10 gegen die Rückstellkraft der Rückstellfeder 11 in Spannrichtung mitgeschleppt. Der am Ende der Schubstange 12 sitzende Stempel 13 beaufschlagt dabei den Kolben 2 der Kartusche. Bei dieser Art der Vorverlagerung der Schubstange 12, wie sie in der Figur 7 dargestellt ist, wird ein ebenfalls von einem Stahlblech ausgebildetes Sperrglied 16 mit verlagert. Dabei wird eine Rückstellfeder 17, die einen Randabschnitt des Sperrgliedes 16 beaufschlagt, komprimiert. Bei der Vorverlagerung stützt sich ein Randabschnitt des Sperrgliedes 16 an einem Bewegungsendanschlag 20 des Grundkörpers 6 ab, der der Seite des Sperrgliedes 16 zugeordnet ist, die bezogen auf die Öffnung 16' der Rückstellfeder 17 abgewandt ist.The above-mentioned stepping gear consists of a propulsion lever 8, which is mounted to a housing-fixed axis 24 on the base housing 6. The propulsion lever 8 can be pivoted by the fingers of a hand 7 comprehensive hand in the direction of the handle 7. In this case, a drive arm of the drive lever 8 moves in the opposite direction and acts on the edge region of a carrier mounted in a bearing chamber 39 10. The driver 10 is a metal plate with a sharp-edged opening 10 ', which is penetrated by the push rod 12. A likewise restrained by the push rod 12 return spring 11 acts on the driver 10 and holds it in a normal position in which the push rod 12 can slide freely through the opening 10 'of the driver 10. If the propulsion lever 8 is pivoted, then the attack of the drive arm 9 at the edge of the driver 10 causes a tilting of the driver 10, so that the sharp edges of the opening 10 engage in the outer wall of the push rod 12. The push rod 12 is thereby coupled in motion with the driver 10 and is entrained by the driver 10 against the restoring force of the return spring 11 in the clamping direction. The seated at the end of the push rod 12 punch 13 acts on the piston 2 of the cartridge. In this type of forward displacement of the push rod 12, as in the FIG. 7 is shown, a likewise formed by a steel sheet locking member 16 is moved with. In this case, a return spring 17, which acts on an edge portion of the locking member 16, compressed. In the forward displacement, an edge portion of the locking member 16 is supported on a movement end stop 20 of the base body 6, which is assigned to the side of the locking member 16, which faces away from the opening 16 'of the return spring 17.

Wird - wie in der Figur 8 dargestellt - der Vortriebshebel 8 entlastet, so dass sich der Mitnehmer 10 geringfügig in Gegenrichtung verlagern kann, so kann sich die pastöse Masse 3 innerhalb der Kartusche entspannen. Dies geht einher mit einer geringfügigen Rückverlagerung des Kolbens 2 bzw. des Stempels 13. Der Rückverlagerungsweg ist begrenzt durch den Stützanschlag 19, der mit Abstand dem Bewegungsendanschlag 20 gegenüberliegt. Zwischen Stützanschlag 19 und Bewegungsendanschlag 20 befindet sich ein Abschnitt der Sperrplatte 16 mit Bewegungsspiel.Will - as in the FIG. 8 shown - the propulsion lever 8 relieved, so that the driver 10 can shift slightly in the opposite direction, so the pasty mass 3 can relax within the cartridge. This is accompanied by a slight return displacement of the piston 2 and the punch 13. The Rückverlagerungsweg is limited by the support stop 19, which is opposite to the Bewegungsendanschlag 20 at a distance. Between the support stop 19 and movement end stop 20 is a portion of the locking plate 16 with movement play.

Wird die Sperrplatte 16 bis in ihre Anschlagstellung an den Stützanschlag 19 verlagert, wirkt auf die Sperrplatte 16 ein Drehmoment, welches insbesondere von der Rückstellfeder 17, aber auch von einer auf die Schubstange 12 wirkenden Kraft aufrecht erhalten wird. Da sich die Schubstange 12 in Klemmstellung in der Öffnung 16' befindet, kann sie nicht entgegen der Vorschubrichtung verlagert werden.If the locking plate 16 is displaced to its stop position on the support stop 19, acts on the locking plate 16, a torque which is maintained in particular by the return spring 17, but also by a force acting on the push rod 12 force. Since the push rod 12 is in clamping position in the opening 16 ', it can not be displaced counter to the feed direction.

Diese rückdrückgesperrte Stellung ist in der Figur 8 dargestellt. Sie kann durch Verschwenken eines Lösehebels 14 bis in die in Figur 9 dargestellte Stellung aufgehoben werden. Der Lösehebel 14 wird dabei um seine Schwenkachse 25 geschwenkt, so dass der von der Rückstellfeder 17 beaufschlagte Randabschnitt des Sperrgliedes 16 von einer Betätigungsschulter 15 verlagert wird. Dabei wird die Rückstellfeder 17 gespannt und das Sperrglied 16 um den Stützanschlag 19 verschwenkt, bis die Schubstange 12 frei durch die Öffnung 16' hindurchgleiten kann.This non-return position is in the FIG. 8 shown. You can by pivoting a release lever 14 to the in FIG. 9 be repealed position shown. The release lever 14 is thereby pivoted about its pivot axis 25, so that the acted upon by the return spring 17 edge portion of the locking member 16 is displaced by an actuating shoulder 15. In this case, the return spring 17 is tensioned and the locking member 16 is pivoted about the support stop 19 until the push rod 12 can pass freely through the opening 16 '.

Im Bereich des Randabschnittes des Sperrgliedes 16, der mit Bewegungsspiel zwischen Stützanschlag 19 und Bewegungsendanschlag 20 liegt, wirkt eine Vortriebsfeder 18 auf das Sperrglied 16. Die Wirkrichtung der Vortriebsfeder 18 ist der Wirkrichtung der Rückstellfeder 17 entgegengerichtet und beaufschlagt das Sperrglied 16 in Richtung auf den Bewegungsendanschlag 20. Ist die Federkraft der Vortriebsfeder 18 größer als die Federkraft der Rückstellfeder 17, so liegt das Sperrglied 16 permanent am Bewegungsendanschlag 20 an. Durch Ausüben eines Drucks auf die Schubstange 12 entgegen der Spannrichtung kann die Schubstange also um das Maß des Bewegungsspieles entgegen der Spannrichtung soweit rückverlagert werden, bis das Sperrglied 16 am Stützanschlag 19 anschlägt.In the region of the edge portion of the locking member 16, which lies with movement play between the support stop 19 and movement end stop 20, a propelling spring 18 acts on the locking member 16. The effective direction of the advancing spring 18 is opposite to the direction of action of the return spring 17 and acts on the locking member 16 in the direction of the movement end stop 20. Is the spring force the advancing spring 18 is greater than the spring force of the return spring 17, so the locking member 16 is permanently on the Bewegungsendanschlag 20 at. By exerting a pressure on the push rod 12 against the clamping direction, the push rod can therefore be shifted back as far as the amount of movement against the tension direction until the locking member 16 strikes the support stop 19.

Ist die Rückstellfeder 17 stärker als die Vortriebsfeder 18, so wird nach Beendigung eines Vortriebshubes durch den Vortriebshebel 8 die Schubstange 12 nicht in der Endstellung des Hubes gehalten. Die Schubstange wird vielmehr durch die Kraft der Rückstellfeder 17 aktiv in die rückstellgehemmte Stellung rückverlagert.If the restoring spring 17 is stronger than the propulsion spring 18, the push rod 12 is not held in the end position of the stroke after completion of a propulsion stroke by the propulsion lever 8. Rather, the push rod is actively shifted back into the restocked position by the force of the restoring spring 17.

Bei dem in der Figur 10 dargestellten Ausführungsbeispiel wird der Stempel 13 von einer nicht dargestellten von einem elektrischen Antrieb 40 verlagerbaren Teleskop-Schubeinrichtung verlagert. Hierzu sind innerhalb des Grundkörpers 6 Batterien und ein von einem Antriebsmotor drehangetriebenes Getriebe vorgesehen. Der Motor beginnt seine Drehung, die mit einer Linearverlagerung des nicht dargestellten Stempels 13 einhergeht, wenn ein Taster 41, der in einer einem Handgriff 7 zugeordneten Grifföffnung angeordnet ist, betätigt wird.In the in the FIG. 10 illustrated embodiment, the punch 13 is displaced by a not shown displaceable by an electric drive 40 telescopic push device. For this purpose, 6 batteries and a rotationally driven by a drive motor gear are provided within the body. The motor starts its rotation, which is accompanied by a linear displacement of the plunger 13, not shown, when a button 41, which is arranged in a handle 7 associated with a handle opening, is actuated.

Im Grundgehäuse 6 befindet sich auch eine Füllstandsanzeige, die von einem in einem Schlitz 46 des Gehäuses 6 geführten Zeiger 45 gebildet ist. Entlang des Schlitzes 46 ist eine Skala 44 vorgesehen.In the base housing 6 is also a level indicator, which is formed by a guided in a slot 46 of the housing 6 pointer 45. Along the slot 46, a scale 44 is provided.

Die Kartusche wird von einer Klemmvorrichtung gehalten, die derjenigen entspricht, die in den Figuren 1 bis 9 an einer handbetriebenen Ausdrückvorrichtung vorgesehen ist und die weiter oben im Detail beschrieben worden ist.The cartridge is held by a clamping device which corresponds to that in the FIGS. 1 to 9 is provided on a hand-operated squeezing device and which has been described in detail above.

Claims (15)

  1. Device for ejecting an in particular pasty substance from a substantially cylindrical cartridge by means of pushing forward a piston (2) in a cartridge tube (1) towards an outlet opening (4), said device comprising a base (21) on which the end (1') of the cartridge tube (1) that is opposite the outlet opening can be fitted, and comprising clamping parts (31) which press against the outer wall of the end (1') of the cartridge tube (1) at the level of the base (21) by means of spring force (29), the clamping parts (31) gripping the cartridge tube at two diagonally opposed points and resting on actuation levers (27) that are acted on by a spring (29) in a clamping position, characterised in that the actuation lever (27) comprises an actuation arm (28) that can pivot inwardly inside a housing and a clamping arm (30) that projects from said actuation lever at an obtuse angle and that, on the end thereof, supports the clamping part (31) formed of a metal plate which abuts the outer wall of the cartridge tube (1) in an oblique manner counter to the movement direction of the plunger (13).
  2. Device according to claim 1, characterised in that the two actuation levers (27) are mounted in a chamber (36) of the main body (6) so as to be rotatable about mutually parallel axes of rotation (33).
  3. Device according to either of the preceding claims, characterised in that the actuation arm (28) that can pivot inwardly inside a housing is supported against a compression spring (29) mounted in a receptacle (34) of the chamber (36).
  4. Device according to any of the preceding claims, characterised in that the clamping part (31) comprises a curved cutting edge (32) which abuts the outer wall of the cartridge tube (1) in an oblique manner counter to the movement direction of the plunger (13).
  5. Device according to either of the preceding claims 3 or 4, characterised in that the chamber (36) is closed by two arms (28, 37) of the actuation lever (27) when the clamping part (31) is in the clamping position.
  6. Device according to any of the preceding claims, characterised in that the base (21), in the region in which the cutting edge (32) of the clamping parts (31) extends against the outer wall of the cartridge tube (1) on an arc-shaped contour, against which the inner wall of the cartridge tube (1) is acted on by the spring force of the compression spring (29).
  7. Device according to any of the preceding claims, characterised in that the base (21) is flattened in two opposing regions (21') that are not acted on by the cutting edge (32).
  8. Device according to any of the preceding claims, characterised in that the base (21) is formed of an annular structure comprising stabilising ribs (26).
  9. Gripping tool in the form of a device according to any of the preceding claims, comprising a gripping jaw, in particular in the form of a plunger (13), arranged on the end of a rod, in particular a push rod (12), that is mounted in a main body (6) so as to be movable, which gripping jaw can be forwardly moved in a gripping direction by means of a stepping mechanism (8, 9, 10, 11), and comprising a releasable push-back lock (14, 15, 16, 17, 18, 19) for preventing return movement of the rod (12) in the opposite direction, characterised in that the push-back lock (14 to 19) only becomes effective after a minor return movement subsequent to a forward movement.
  10. Gripping tool according to claim 9, characterised in that a detent (16) of the push-back lock (14 to 19) is at a distance from a support stop (19) after forward movement and can be moved back into an abutment position relative to the support stop (19) after forward movement has ended by means of pressure on the gripping jaw, in particular the plunger (13), or by means of the force of a return spring (17).
  11. Gripping tool according to either claim 9 or claim 10, characterised by a movement end stop (20) which is at a distance from the support stop (19) and against which the detent (16) strikes during forward movement of the rod (12).
  12. Gripping tool according to one or more of claims 9 to 11, characterised in that the detent (16) is a clamping plate comprising an opening (16') through which the rod (12) is guided and/or is held in a clamping position relative to the rod (12) by a return spring (17).
  13. Gripping tool according to any of claims 9 to 12, characterised in that the detent (16) is acted on by a propulsion spring (18) in the forward movement direction, by means of which spring the detent (16) is made to hit against the movement end stop (20).
  14. Gripping tool according to any of claims 9 to 13, characterised by a release lever (14) for releasing the push-back lock (14 to 19).
  15. Gripping tool according to any of claims 9 to 14, characterised in that the return spring (17) acts on the end of the stop plate (16), on which an actuation shoulder (15) of the release lever (14) also acts, and the propulsion spring (18) acts in the region of the opposing end of the stop plate (16), which end interacts with the support stop and the movement end stop (20).
EP10722371.1A 2009-06-24 2010-06-09 Clamping tool in the form of a cartridge discharging device Active EP2445652B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009026025A DE102009026025A1 (en) 2009-06-24 2009-06-24 Clamping tool in the form of a cartridge ejection device
PCT/EP2010/058043 WO2011006712A1 (en) 2009-06-24 2010-06-09 Clamping tool in the form of a cartridge discharging device

Publications (2)

Publication Number Publication Date
EP2445652A1 EP2445652A1 (en) 2012-05-02
EP2445652B1 true EP2445652B1 (en) 2017-08-02

Family

ID=42732790

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10722371.1A Active EP2445652B1 (en) 2009-06-24 2010-06-09 Clamping tool in the form of a cartridge discharging device

Country Status (3)

Country Link
EP (1) EP2445652B1 (en)
DE (1) DE102009026025A1 (en)
WO (1) WO2011006712A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011004971A1 (en) * 2011-03-02 2012-09-06 Hilti Aktiengesellschaft dispenser to
DE102012201295A1 (en) * 2012-01-31 2013-08-01 Hilti Aktiengesellschaft dispenser to
DE102014116514A1 (en) 2014-11-12 2016-05-12 Wolfcraft Gmbh Clamping device, in particular in the form of a cartridge ejection device

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29903910U1 (en) 1999-03-05 1999-06-10 Schneider Friedhelm Cartridge press with a cartridge holder
DE29904071U1 (en) 1999-03-05 1999-06-17 Schneider Friedhelm Cartridge press with a cartridge holder
CN101524566B (en) * 1999-11-24 2017-04-12 拜耳医药保健有限责任公司 Front loading medical injector, syringe, syringe interface, and lunger piston assembly for an injector
US6929619B2 (en) * 2002-08-02 2005-08-16 Liebel-Flarshiem Company Injector
EP1735110B8 (en) 2004-04-08 2008-05-21 RPC Bramlage DHS B.V. Cartridge pistol with a cartridge holder
US20100042054A1 (en) * 2006-11-17 2010-02-18 Novo Nordisk A/S Medical Delivery System Comprising a Coding Mechanism Between Dosing Assembly and Medicament Container

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
WO2011006712A1 (en) 2011-01-20
DE102009026025A1 (en) 2010-12-30
EP2445652A1 (en) 2012-05-02

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