HU184598B - Gun for receiving holder containing pastelike material - Google Patents

Abstract

1. A gun for receiving a cartridge (8) containing a pasty substance with a holder space of a tubular form at least in the front end zone, for the cartridge (8), wherein a piston (2) can be moved from behind towards the front end of the holder space for emptying the cartridge (8) and into which the cartridge (8) can be inserted from the front, there being provided at the front end of the holder space arms (4), each having at their front end a projection (5) directed inwards, which extend forwards and outwards, or which can be tilted outwards, and a collar (7) which is movable in an axial direction between a retracted opening position wherein the arms (4) are expanded, and an advanced closing position wherein the arms (4) are pushed inwards and wherein their projections (5) engage the front end (9) of a cartridge (8) inserted into the holder space, characterized in that the arms (4) are formed by sections disposed in an axial direction in the front zone of wall (1) of the holder space and made of an elastic material integrally therewith.

Description

FIELD OF THE INVENTION The present invention relates to a receptacle for receiving a cartridge-like reservoir of gun paste material, at least at its front end having a tubular receptacle in which a plunger can be moved forward to empty the reservoir and into which the cartridge is inserted.

Both hand-operated and compressed-air versions of these guns are known, and the receptacle space for these guns is generally comprised of a tubular body. In this tubular body, a piston is movable by means of a suitable gear, while at its front end is a screw cap, which can be unscrewed for insertion of the container or cartridge and then screwed back, thus serving as a front support for the cartridge. This screw cap extends through the nozzle of the cartridge, which, in turn, has to push the paste-like material out of the cartridge or container.

The cartridges to be used consist essentially of a long tubular body with a rigid outer wall with a sealing plunger inserted at the rear. This sealing plunger can be moved by the pistol plunger to extrude the pasty material from the container. The backside of the cartridge can also be securely closed when the gun plunger is pressed against the paste-like material during movement of the cartridge wall,

For the above-mentioned pistols, where the cartridge has to be inserted from the front, the screw cap must first be removed to insert the cartridge, then re-screwed after inserting the cartridge, and the screw cap removed again to remove the empty cartridge.

It is an object of the present invention to provide a pistol in which the insertion of a full cartridge or the removal of an emptied cartridge can be easily accomplished.

According to the invention, the object is solved by providing a plurality of arms with elastic extensions extending forward and outwardly and tilting outwardly on the front end of the pistol receiving space, and an outer sleeve on the outer side of the receiving space movable between the retracted opening position and an advanced closing position and in the closed position the arms are clamped inward and their extensions extend beyond the front end wall of the cartridge inserted in the receiving space.

Thus, the pistol of the present invention has no screw cap at the front end, but at the front of the pistol receiving space are elastically deformable holding levers which, in their outward facing position, allow the cartridge to be inserted and removed while locking the cartridge and reservoir into the pistol.

In order to simplify the insertion of the containers, the arms may be pivotable outward, which in their normal position extends to the line of the receptacle wall and their inward projections are inclined from the outside to the inside and rearward. As a result, the arms are extended by the pushed-in container, and after inserting the cartridge, they automatically return to their closed position, in which position they are retained by the advanced sleeve.

The levers may be made of a deformable plastic material together with a portion of the receptacle wall, but preferably the entire receptacle wall is made of plastic. Thus it can be produced in one piece. However, it is possible, for example, to make the arms and the associated wall portion made of, for example, ru2 stainless steel, whereby the arms can be flexibly moved between the closing and opening positions.

There are extensions or projections limiting the movement of the sleeve on the outside of the arms on the outside of the arms to limit forward movement of the sleeve or prevent the sleeve from being pulled from the pistol.

The arms preferably consist of axially extending recesses at the front end of the tubular body.

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described in detail with reference to the simplified schematic drawings.

Figure 1 illustrates a portion of the gun where the cartridge is inserted with the arms in the open position.

Figure 2 illustrates the cartridge of Figure 1 with the gun further inserted.

Figure 3 shows the cartridge with the arms already closed with the gun inserted.

Figure 4 is a perspective view of the arms in the open position and the arm portion of the sleeve connected thereto.

FIG. 1 to 4 illustrate a cartridge according to another embodiment.

1-3. 1 to 4, the pistol partially depicted has a receptacle space formed by a tubular body 1 in which a piston 2 can be released by means of a piston rod 3 connected to an actuator not shown.

The front, that is, Figures 1-3. 1 to 2, the tubular body 1 extends in an open position according to Figs. As shown in Fig. 4, there are such arms along the entire circumference of the tubular body 1, which are substantially separated by axial slits. There are 6 extensions on the outside and close to the front end of each arm, the role of which will be described below. For convenience, these extensions are not shown in Figure 4. The tubular body 1 further comprises a sleeve 7 movable in the axial direction thereof.

In the open position shown in Fig. 1, the sleeve 7 is retracted to such an extent that it is not in contact with the arms 4 and is thus inclined outwardly. These form a funnel-shaped opening, and this opening, as shown in Figure 1, accepts 8 cartridges. By inserting the cartridge into the tubular body 1 to the position shown in Fig. 2 to the extent that its front end wall 9 is behind the extensions 5 of the arms 4, the sleeve ^{7 can} be advanced axially until it engages with the extensions 6. Meanwhile, the sleeve contacts the outer surface of the arms 4 and presses the arms inward, whereby the arms 5 engage their extensions 5 to the end wall 9 of the cartridge 8, as shown in FIG. If in this end position the plunger 2 is moved forward, i.e. in the direction of the arms 4, the extensions 5 grip the cartridge 8 against the movement of the plunger within the tubular body 1, thereby pushing the paste material out of the cartridge through the nozzle 10.

To remove the evacuated cartridge 8, the sleeve 7 must be pulled back so that the extensions 5 of the arm 4 extend out of the region of the end wall 9 of the cartridge as shown in FIG. The cartridge can then be removed and a new cartridge inserted.

In the embodiment of Figure 5, the components are the same as those of Figures 1-4. and the same but a comma reference.

184,598

The only difference is that the arms 4 'are not outwardly at rest, but parallel to the tube body 1 and the front faces of the projections 5' run inwards and obliquely. Thus, the bottom edge of the cartridge 8 to be inserted slides down on the surface of these projections 5 'and stretches the arms 4'. When the cartridge 8 is inserted, that is, in the position shown in Figure 2, the arms 4 'automatically return to their position shown in Figure 3 and the extended sleeve 7 only fixes their position.

It is to be noted that the arms 4 'extend obliquely outwardly on their front outer surface and thus limit the forward displacement of the sleeve 7.

Claims (4)

Patent claims ·, 5 A pistol for receiving a cartridge-like container containing a paste-like material, at least at its front end having a tubular receptacle in which a plunger can be moved forward to evacuate the container and into which the cartridge 20 can be preloaded, having elastic members (4) with an inwardly extending extension (5) at their front ends and a sleeve (7) on the outside of the recording space which is axially retracted in an open position in which the arms (4) are extended and pushed forward the arms (4) are clamped inwardly and their extensions (5) extend behind the front end wall (9) of the cartridge (8) inserted in the receiving space. A pistol according to claim 1, characterized in that extensions (6) limiting the advance of the sleeve (7) are provided on the outside of the arms (4). An embodiment of a pistol according to claim 1 or 2, characterized in that the arms (4) at the forward end of the barrel are formed by axial slits. 4. A gun according to any one of the preceding claims, characterized in that the front faces of the inwardly facing extensions (5 ') of the outwardly tilting arms are inclined from the outside to the inside and rearward.