KR100859888B1 - Cartridge pistol with a cartridge holder - Google Patents

Abstract

The present invention is a cartridge gun (1) with a cartridge holder (3), comprising elastic gripping members (17), a movable piston rod (4) and a piston rod (4) for moving a piston of the cartridge (10). Disclosed is a cartridge gun comprising an actuating device for moving a tool. The cartridge holder 3 comprises a cylindrical base 12 for receiving the bottom area of the cartridge 10, with the gripping members 17 extending from the center of the cartridge holder 3 toward the housing 7. It projects radially outward into the annular groove 14 of (12) up to the outer wall of the annular groove 14 of the base 12 and is supported at the center of the base 12 by the hub 16. When the piston rod 4 is fully retracted to release the cartridge for removal, the means 5, 25 designated to press the ends of the elastic gripping members 17 toward the housing 7 are pistons. It is also arranged at the front end of the rod.

Description

Cartridge pistol with cartridge holder {CARTRIDGE PISTOL WITH A CARTRIDGE HOLDER}

The present invention relates to a cartridge gun having a cartridge holder according to the preamble of claim 1.

Also known as cartridge presses, cartridge guns are known which are used for pressurized evacuation of a material such as a paste, for example sealing material, adhesive material or the like, from a cartridge. Such pressing tools include a shell for receiving a cartridge, the shape of which is adapted to the outer shape of the cartridge. One surface side of the shell is fixed to the handle of the cartridge press. A recess is formed on the surface side, and a stamped pressure rod is movable within the recess. A slot is formed on the opposite surface side, and a tip of the cartridge including a movable floor acting as a piston may be disposed in the slot. The pressure rod is pushed forward by a gun-like actuating mechanism that includes a swivelable trigger lever shaped actuation member. The rod is moved forward by a short step during each triggering movement. For this purpose, the actuation mechanism is pushed forward by the manual movement of the actuation member and comprises an advancing element which entrains the rod. When the actuation member is released, the advancing element slides back empty on the rod.

The main disadvantage of the known cartridge holders is their overall size and the weight of the cartridge gun thereby. The formation of cartridge holders consisting of sheet metal or the like results in a relatively high consumption of material. About half of the material required for such a cartridge press is used for the construction of the cartridge holder, which obviously affects the total weight of the cartridge gun. A reduction in the allocation of the material of the cartridge holder and thus a subsequent reduction in weight is desirable. An additional disadvantage of such cartridge holders is that insertion and removal of the cartridge is cumbersome since jams often tend to occur.

A hand press gun is known from German patent publication DE G89 01 028.0, in which a screw cap with an inner helix is attached to the surface side of the gun grip. A spiral ring with an outer helix and a shaft bore is screwed into the screw cap. The cartridge containing the flange at the rear end is pushed from the rear through the spiral ring until the flange abuts the rear side of the spiral ring. The spiral ring is then screwed into the screw cap.

EP-A2-1 034 847 discloses a cartridge press having a cartridge holder comprising claws whose free ends engage in an outer wall of the cartridge pushed into the holder. The claw is slightly inserted into the material of the cartridge so that the cartridge is securely supported. The movable sleeve is pressed against the cartridge holder and the claw to remove the cartridge from the cartridge holder to release the cartridge, and the cartridge can be pulled out of the cartridge holder.

The above hand press guns have the disadvantage that the replacement of the cartridge is cumbersome and time consuming. The spiral ring or sleeve needs to be unscrewed or actuated first before the cartridge can be removed from the holder. This operation is cumbersome because it actually requires three hands, i.e. hands to support the gun, hands to unscrew the spiral ring and press the cartridge against the claw, and remove the empty cartridge from the cartridge gun. Because you need an extra hand to do it.

Accordingly, it is an object of the present invention to provide a cartridge gun having a cartridge holder which requires less material and enables simple replacement of the cartridge.

The object of the present invention can be achieved by a cartridge gun having the features of claim 1.

It is a principle of the present invention that the cartridge receiver consists only of a base into which the lower end of the cartridge is insertable. Gripping elements are disposed in a base that supports the cartridge while being fastened to the inner wall of the inserted cartridge. For the purpose of releasing the gripping element, the piston rod has a stamp placed at the piston rod front end to release the cartridge for removal by pressing the gripping element backwards from the gripping position. Until, completely back. An advantage of this cartridge gun is that the cartridge receiver consists only of the base and does not extend over the entire length of the cartridge to be inserted. The material can be saved by omitting the shell configuration for the cartridge holder. Thus, the total weight of the cartridge gun can be kept low. The cartridge gun also includes an actuating device for moving the piston rod, which makes it possible to move the piston rod in a continuous manner alternately in the forward direction or in the reverse direction. The stamp is placed at the front end of the piston rod. Such stamps include a rear projecting edge. To remove the used cartridge, the stamp retracts with the piston rod until the edge of the stamp is supported by the gripping element disposed on the base of the cartridge holder. Retraction of the stamp may be by pulling at the rear end of the piston rod or by multiple pressing of the retraction lever to move the piston rod in the rearward direction. By updated pressing of the retract lever, the stamp presses the gripping element and separates the gripping element fixed to the cartridge wall. The cartridge can be removed without any obstruction from the cartridge holder. Removal of the used cartridge from the cartridge gun is substantially simplified with the cartridge gun according to the invention, thus facilitating replacement of the cartridge.

Another advantage of the cartridge gun according to the invention is that the actuating device allows for continuous movement forward and backward of the piston rod. One problem that occurs during pressurized ejection of a material, such as paste, is that pressure builds up in the cartridge during the advancement of the stamp attached to the piston rod and the pressurization of the piston. After a certain amount of mass-like discharge of the paste, which corresponds to the advancing path, subsequent dripping occurs by pressure relief, and therefore is quite significant to achieve accurate dosing and apportioning. it's difficult. The accompanying dripping can contaminate the surrounding environment. The pressure build-up that causes the accompanying dripping is caused on the one hand by the fact that the medium to be pressurized contains some compressibility, and on the other hand, some elastic deformability of the cartridge. Caused by. Concomitant dripping can be avoided if the pressure in the cartridge is reduced in time. This can be accomplished by retracting the stamp in time. Once enough material is pressurized out, a short pressing of the retraction lever is sufficient, as a result of which the stamp retracts slightly back and the force on the portion of the stamp no longer acts on the piston. The accompanying problem of dripping can be avoided by the cartridge gun according to the invention.

Further advantages of the invention follow from the dependent claims and the following description, in which the invention is explained in more detail with reference to the embodiments schematically illustrated in the drawings.

The drawings are as follows.

1 shows a cartridge gun,

2 shows in cross section a cartridge gun with an inserted cartridge,

3 shows an enlarged sectional view according to FIG. 2 with an actuating device for moving the cartridge holder and the piston rod, FIG.

4 shows an enlarged cross-sectional view of a cartridge holder with an actuating device for moving a piston rod with a fully retracted stamp.

In the drawings, the same reference numerals are used for the same members. Unless expressly stated otherwise, the first statement refers to all drawings. The terms front and rear refer to the cartridge gun, in which the cartridge holder is disposed in front, and the rear means its opposite end.

1 schematically shows a cartridge gun 1. The cartridge gun 1 comprises a housing 7 with a grip 2 and a cartridge holder 3. Advancing and retracting devices for moving the piston rod 4 are arranged in the housing 7, which can be actuated by a pressure trigger. The piston rod 4 moves forward by a short step in each pressurization motion on the advancement trigger 8, and backwards along the pressurization motion of the retraction trigger 9. Move by a short step. A stamp 5 forms the front end of the piston rod 4, and a holding knob 6 is provided at the rear end of the piston rod 4. The holding knob 6 can be used to retract the piston rod 4 or can be pushed into the cartridge to the bottom of the cartridge.

2 shows a cross-sectional view of a cartridge gun 1 with a cartridge 10 inserted into a cartridge holder 3. The cartridge 10 is shown without any contents and without the cartridge bottom forming the piston. The piston rod 4 is fully retracted. In each pressing motion on the forward lever 8 in the direction towards the grip 2, the piston rod 4 is pressed slightly forward into the cartridge 10 in the direction of the nozzle 11. In this process, the stamp 5 pressurizes the piston of the cartridge, pressurizes a material such as paste in the cartridge, and sends it out through the nozzle 11. A short press on the retract lever 9 in the direction towards the grip 2 pushes the piston rod 4 backward by a small step, so that the piston is released and the pressure in the cartridge 10 is reduced. Thus subsequent dripping can be avoided.

FIG. 3 shows an enlarged sectional view of FIG. 2 with an actuating device in the housing 7 for moving the cartridge holder 3 and the piston rod 4. The cartridge holder 3 consists of a cylindrical base 12 with an annular groove 14. The outer diameter of the annular groove 14 corresponds to the outer diameter of the cartridge 10, so that the cartridge can be effortlessly inserted into the annular groove 14 of the base 12 and is supported on the outer wall of the annular groove 14. An axially extending graduated hole bore 15 in the center of the base 12 is used for the reception of the hub 16. The gripping elements 17 are clamped between the hub 16 and the edge 20 of the collar 18 formed by the annular groove 14 and the hole bore 15. The gripping member 17 may be a separate claw projecting into the annular groove 14, the free end of which reaches up to the outer wall of the annular groove 14. In the embodiment shown, the gripping member is formed by a jacket surface with a longitudinal recess of a truncated cone shaped member. The top cover surface of the truncated element comprises a bore such that the remaining circular ring of the cover surface can be clamped between the hub 16 and the edge 18 of the collar 18. The strip-like gripping member 17 is sharp and protrudes into the annular groove 14 until its free end reaches the outer wall of the annular groove 14 in the direction of the housing 7 of the cartridge gun 1. By recesses in the jacket surface of the truncated member which may have an edge or point shape. In order to ensure sufficient stability and elasticity of the elastic gripping member 17, it is advantageous that this gripping member 17 is made of spring steel. Other materials for making the gripping member are also possible. Once the cartridge 10 is pressed into the base 12 of the cartridge holder 3, the gripping element 17 presses and supports the inner wall 13 of the cartridge 10 to its free end. As soon as the stamp 5 is used to pressurize the piston of the cartridge 10, pressure also acts on the cartridge 10, which attempts to pressurize the cartridge 10 from the cartridge holder 3. This is prevented by the gripping member 17 which grips the side wall of the cartridge slightly below this pressure.

A forward drive disk 21 which is tiltable in a known manner is attached in the housing 7, through which the piston rod 4 protrudes through the opening of the front drive disk. The opening of the front drive disk 21 is slightly larger than the diameter of the piston rod 4, so that the front drive disk 21 can move freely along the piston rod 4. The front drive disc 21 is pushed back by the pressure spring 22. The grip 2 comprises a forward trigger 8 acting on the underside of the front drive disc 21. As a result of operating the forward trigger 8, the front drive disc 21 is inclined until the piston rod 4 is pressed and jammed there, and against the preliminary tension of the pressure spring 22. More pressurized forward. This moves the piston rod 4 with the stamp 5 forward. Another tiltable drive disc 24 is attached in the housing 7 for the rearward movement of the piston rod 4. This retracting drive disk 24 is pushed forward by the pressure spring 22. A retract trigger 9, which can be pivoted about an axis 19, is arranged in the housing 7 for the opposite movement of the piston rod 4, which trigger acts on the underside of the retract drive disk 24. do. The retraction drive disk 24 is first inclined in a retracting manner by actuating the retraction trigger 9 until the piston rod 4 is pressed and jammed there, thus preliminary tensioning of the pressure spring 22. It is pushed further backwards against, which moves the piston rod 4 with the stamp 5 backwards.

As with the newly inserted cartridge 10, the piston rod 4 is located in the retracted position in the figure. By pressing the forward trigger 8, the piston rod 4 with the stamp 5 is continuously pressed into the cartridge 10 in the forward direction to pressurize the piston, which is like a paste in the cartridge 10. Pressurize the mass. Once sufficient material is discharged from the cartridge 10, a short pressure on the retraction trigger 9 is sufficient to move the piston rod 4 slightly backwards. As a result, no pressure is exerted on the piston by the stamp 5 and the excess pressure in the cartridge 10 is reduced, thus preventing subsequent dripping. The stamp 5 disposed at the front end of the piston rod 4 comprises a flat front surface and a rearwardly protruding edge 25 which is slightly inclined at its end 26. The inclination corresponds approximately to the inclination of the gripping member. For the purpose of removing or replacing the empty cartridge 10, the piston rod is pushed backwards. This can be done manually by pulling the piston rod 4 backwards at the knob 6 until the stamp 5 is supported at its edge 26 by the gripping member 17. Retraction of the piston rod 4 can also be achieved by operating the retraction trigger 9 several times until the stamp 5 is fully retracted. To remove the cartridge 10 from the cartridge holder 3, one hand supports the cartridge 10, and the other hand activates the retraction trigger 9 again. The inclined end 26 of the edge 26 of the stamp 5 presses the elastic gripping member 17, so that this gripping member is pressed in a direction away from the inner wall 13 of the cartridge 10, and The cartridge 10 can be removed from the cartridge holder 3. As soon as the stamp 5 is pushed back in the forward direction, the elastic gripping member 17 returns to the initial position of the elastic gripping member as a result of the elasticity of the member, which has a free end at the inner end of the circular groove 14. Means to reach again.

4 shows an enlarged sectional view of a housing 7 with an actuating device for moving the piston rod 4 and the cartridge holder 3 when the stamp 5 is fully retracted. 4 also shows that the retraction trigger 9 is pressed, and the gripping member 17 is pressed against its interior from the rear projecting edge 25 of the stamp 5, and thus the boundary area of the annular groove 14. The situation is shown in which the cartridge 10 can be pulled out of the cartridge holder 3 as a result.

The embodiment shown in the figure shows a cartridge gun 1, in which the housing 7 with the grip 2 and the cartridge holder 3 is in an integrated configuration and is made of plastic, for example. It is also possible for the cartridge gun 1 to consist of individual parts, and the base 12 of the cartridge holder 3 to be screwed onto the surface side of the housing 7.

The present invention can be used in cartridge guns.

Claims (11)

A cartridge gun (1) with a cartridge holder (3), comprising elastic gripping members (17), a movable piston rod (4) for moving the piston of the cartridge (10), and a piston rod (4). A cartridge gun comprising an actuating device for moving, comprising: The cartridge holder 3 comprises a cylindrical base 12 for receiving the bottom area of the cartridge 10, the gripping members 17 extending from the center of the cartridge holder 3 in the direction of the housing 7. It projects radially outward into the annular groove 14 of the annular groove 14 of the base 12 and is supported at the center of the base 12 by the hub 16, and the piston rod 4. Cartridge gun, characterized in that means (5, 25), which are used to press the ends of the elastic gripping members (17) in the direction of the housing (7), are also arranged at the front end of the piston rod . The method of claim 1, The gripping members 17 are formed from a conical shaped member whose jacket surface comprises a recess, in such a way that separate elastic gripping members 17 are formed which can be moved independently of one another. A cartridge gun, characterized in that the top cover face comprises a bore, and the remaining circular ring of the cover face can be fixed at the center of the base (12) by the hub (16). The method of claim 1, Cartridge gun, characterized in that the gripping member (17) is formed of spring steel. The method of claim 2, Cartridge gun, characterized in that the gripping member (17) is formed of spring steel. The method according to any one of claims 1 to 4, Cartridge gun, characterized in that the means (5, 25) arranged at the front end of the piston rod (4) to press the gripping members (17) are formed by a stamp (5) with a rear projecting edge (25). . The method according to any one of claims 1 to 4, An actuating device for moving the piston rod (4) comprises means (21, 8; 24, 9) for advancing and retracting the piston rod (4). The method of claim 5, An actuating device for moving the piston rod (4) comprises means (21, 8; 24, 9) for advancing and retracting the piston rod (4). The method of claim 6, Means for advancing and retracting the piston rod 4 include an inclined forward drive disc 21 and an inclined retract drive disc 24 with openings, respectively, through which the piston rod 4 protrudes. The openings of the drive disks 21, 24 are slightly larger than the diameter of the piston rod 4 so that the drive disks 21, 24 can move freely along the piston rod 4, and the two drive disks 21. A pressure spring 22 is arranged between the two, 24 to press the front drive disc 21 rearward and the retract drive disk 24 forward, the grip 2 being at the bottom side of the front drive disk 21. A retraction trigger 9 acting on the lower side of the retraction drive disc 24 is arranged in the housing 7 and forward driven by the operation of the forward trigger 8. The disc 21 is tilted forward and jam is generated and the piston rod 4 can be moved forward against the preliminary tension of the pressure spring 22, and the retract drive disc (in operation of the retraction trigger 9) 24) cartridge gun, characterized in that the back is inclined and jam is generated and the piston rod (4) is movable backwards against the preliminary tension of the pressure spring (22). The method of claim 7, wherein Means for advancing and retracting the piston rod 4 include an inclined forward drive disc 21 and an inclined retract drive disc 24 with openings, respectively, through which the piston rod 4 protrudes. The openings of the drive disks 21, 24 are slightly larger than the diameter of the piston rod 4 so that the drive disks 21, 24 can move freely along the piston rod 4, and the two drive disks 21. A pressure spring 22 is arranged between the two, 24 to press the front drive disc 21 rearward and the retract drive disk 24 forward, the grip 2 being at the bottom side of the front drive disk 21. A retraction trigger 9 acting on the lower side of the retraction drive disc 24 is arranged in the housing 7 and forward driven by the operation of the forward trigger 8. The disc 21 is tilted forward and jam is generated and the piston rod 4 can be moved forward against the preliminary tension of the pressure spring 22, and the retract drive disc (in operation of the retraction trigger 9) 24) cartridge gun, characterized in that the back is inclined and jam is generated and the piston rod (4) is movable backwards against the preliminary tension of the pressure spring (22). The method according to any one of claims 1 to 4, Cartridge gun, characterized in that the cylindrical base (12) is integrally formed in the housing (7). The method according to any one of claims 1 to 4, Cartridge gun, characterized in that the housing (7), the grip (2) and the base (12) are formed of plastic.

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