GB2074705A - Explosive-actuated stud setter - Google Patents

Abstract

An explosive-actuated stud setter including a housing (1) and a barrel (3) mounted in the housing (1) in such a manner that it can be displaced only in the direction of its longitudinal axis. The barrel (3) includes a chamber (7) for receiving a cartridge (8), the said chamber (7) being arranged to extend transversely to the longitudinal axis of the barrel (3). The chamber (7) is movable into the firing position and into the loading position by axial displacement of the barrel (3). A cartridge ejector (15) is arranged so that when the barrel (3) is adjusted out of the firing position in the direction of the barrel mouth, the ejector (15) is caused to move in a direction towards the mouth of the cartridge chamber (7) and cause a cartridge (8) in the chamber (7) to be ejected exclusively when the barrel (3) is between the firing and the loading positions. <IMAGE>

Description

SPECIFICATION Explosive-actuated stud setter The invention reiates to an explosive-actuated stud setter.

German Utility Model 6,912,075, describes an explosive-actuated stud setter having a barrel which is axially displaceable in a hous ing and which can be turned by hand about its longitudinal axis. Also provided is a trans versely adjustable cartridge ejector, which, in a certain position of rotary adjustment of the barrel, runs onto a curved piece and ejects a spent cartridge located in a cartridge chamber through a window in the side of the housing.

In this stud setter however, unloading and renewed loading is relatively complicated. Fur thermore, there is a risk of incorrect operation, if, before reloading of the appliance, the bar rel is not turned about its longitudinal axis, so that the cartridge chamber is not emptied and, consequently, cannot be reloaded.

The object of the invention is to provide an explosive-actuated stud setter having a sim pler loading action, and in which reloading is not impaired as a result of incorrect operation of the device.

Accordingly, the present invention provides an explosive-actuated stud setter including a housing and a barrel mounted in the housing in such a manner that it can be displaced only in the direction of its longitudinal axis, the barrel including a chamber for receiving a cartridge, the said chamber being arranged to extend transversely to the longitudinal axis of the barrel, the chamber being movable into the firing position and into the loading posi tion by axial displacement of the barrel, and a cartridge ejector which is arranged so that when the barrel is adjusted out of the firing position in the direction of the barrel mouth, he ejector is caused to move in a direction towards the mouth of the cartridge chamber and cause a cartridge in the chamber to be ejected exclusively when the barrel is between the firing and the loading positions.

In accordance with the present invention, in order to unload and reload the stud setter it is necessary only to displace its barrel longitudi nally. When the barrel is displaced in the direction of its mouth, unloading of the car tridge chamber takes place automatically, that is to say without any manual assistance. This results in the desired simplification of opera tion. Furthermore, incorrect operation which has been possible hitherto is reliably pre vented.

For this purpose, in an advantageous em bodiment the cartridge ejector includes a pawl which interacts with a stop integral with the housing and which is mounted so that it can pivot to a limited extent about a pin running transversely to the longitudinal axis of the barrel, axial movement of the barrel in the direction of the barrel mouth causing the pawl to pivot temporarily and abut against the said stop on the housing, and to move the cartridge ejector in the ejection direction and to return to the original position when the ejection position is reached, the ejector mechanism being designed to be blocked when the barrel returns from the loading position into the firing position.

In a preferred development which is robust and, at the same time, also functionally reliable and favourable in production terms, the pawl is elongate and, in the one extreme pivoting position, is urged against the inside of the housing by the restoring force of a spring element, so that it runs alongside and approximately parallel to the longitudinal extension of the housing, the forward end of the pawl having a catch for engaging with the said stop on the housing when the barrel is moved in the direction of the barrel mouth.

Preferably, in order to ensure that the pawl rests only temporarily on the said stop to move the cartridge ejector in the ejection direction, the catch has a run-up ramp which interacts with the said stop and which returns the pawl into its original position after the ejection position is reached.

Instead of this, but especially in addition to this, there can be provided a spring element which returns the pawl into the original position after the ejection position is reached.

In a preferred arrangement there is provided a prestressed compression spring which is supported, at one end on the barrel and, at the other end on the pawl, the pawl having two sloping supporting faces directed differently fron one another, the supporting faces being arranged so that one of the supporting faces, influenced by the compression spring, exerts on the pawl a torque which urges the latter along its side against the inner wall of the housing, and so that the other supporting face converts the spring force into a torque returns the pawl from the ejection position to its original position.

This has the advantage that, by means of only one spring element, the pawl is both pressed against the inside of the housing and is reliably returned to its original position after the ejection position is reached.

A particularly favourable arrangement, in production terms, of the said stop on the housing is a longitudinally running slot located in the housing with the end face of the slot facing the barrel mouth acting as a stop face.

An exemplary embodiment of the invention will be more fully described below, by way of example only, with reference to the accompanying drawings, in which: Figure 1 shows a side view, in section, of an explosive-actuated stud setter in accordance with the present invention, Figure 2 shows the stud setter of Fig. 1 in the ejection position, Figure 3 shows an enlarged detailed view, in longitudinal section and partly cut away, of part of the stud setter shortly before the ejection position is reached, Figure 4 shows the stud setter of Fig. 3 during the ejection of a cartridge sleeve, Figure 5 shows the stud setter of Fig. 3 looking along the line V-V of Fig. 3, Figure 6 shows the stud setter of Fig. 3 during the return of the barrel into the firing position.

Referring to the drawings, an explosiveactuated stud setter comprises essentially a housing 1 with a pistol grip 2, a barrel 3 which is longitudinally displaceable in the housing 1, a spring-loaded straight-pull breech 4 with a firing device 5, and a rechargeable cartridge magazine 6.

Located in the barrel 3 is a driving piston 9 which can be stressed by the propellent gases of a cartridge 8 held in the cartridge store 7 and which, after the firing of the cartridge, strikes against a stud (not shown) which is pushed into the barrel mouth.

To fire a cartridge, the barrel 3 and the breech 4 must be adjusted, in respect of the housing 1, against spring force out of the position illustrated in Fig. 1, for which purpose the barrel mouth is supported on the workpiece into which the stud is to be driven, until the release mechanism 11 which can be actuated by means of a trigger 10 stands opposite the firing device 5 located in the breech 4.

The cartridge store 7 is arranged to extend transversely to the barrel axis and opens into the barrel bore via channel 1 2. The longitudinal axis of the cartridge store 7 and that of the barrel 3 form supplementary angles of approximately 60 and 120 . The mouth of the cartridge store 7 is arranged at right angles to its longitudinal axis. Located opposite the mouth of the cartridge store is a breech dividing face 1 3 which runs parallel to said mouth and which, at the latest when the barrel 3 and the breech 4 are adjusted intothe rady-to-fire position, presses into the cartridge store 7, in the correct position, a cartridge 8 located in the cartridge store 7, and holds this cartridge securely until it is fired.

Moreover, in addition to the cartridge store 7, a ram-shaped cartridge ejector 15, with an extractor claw 1 6 which projects laterally and reaches into the cartridge store 7 and which grips under the laterally projecting margin of a cartridge 8, is mounted in the barrel 3, so that it can be displaced to a limited extent exclusively longitudinally, in a channel 14 which runs parallel to the longitudinal axis of said cartridge store.

The cartridge ejector 1 5 is slotted longitudinally. An elongate pawl 1 8 is mounted so that it can pivot about an axle 1 9 retained in the ejector 1 5, in this slot 17, on that end part of the cartridge ejector 1 5 which faces away from the claw 16. In addition, the pawl 18 is guided in a barrel slot matched to it.

Provided in the slot 1 7 of the cartridge ejector 1 5 is a further prestressed helical compression spring 20, one end of which is supported on a pin 21 which is integral with the barrel and which likewise passes through the slot 1 7. The other end of the spring is supported on the pawl 18 via a ball 22.

The pawl has two sloping faces 23 and 24 which abut against the ball 22 and which exert torques on the pawl 1 8.

A catch 25 is provided on that free end of the pawl 1 8 which faces the barrel mouth.

The catch interacts with a stop integral with the housing, to eject a cartridge 8 out of the cartridge store 7. This stop is designed as a longitudinal slot 26, of which the end face 27 facing the barrel mouth is designed as an abutting face.

To eject a cartridge sleeve, the barrel 3 is pulled out of the housing 1. As soon as the pawl 18 passes the slot 26, it partly rises into the slot 26 and engages with it under the action of the compression spring 20 which exerts a torque on the pawl 1 8 via the ball 22 and the pawl supporting face 23 so as to rotate the pawl in clockwise direction (see Figs. 3 and 6). As the barrel 3 moves further in the direction of the barrel mouth, the catch 25 of the pawl engages with the supporting face 27 of the slot 26.At the same time, as shown in Fig. 2, the pawl is pivoted in a clockwise direction, thus causing the cartridge ejector 1 5 to move downwardly in the ejection direction, the claw 1 6 of the cartridge ejector thereby forcing out of the cartridge store 7 a cartridge located therein and ejecting the cartridge through a window 28 located in the underside of the housing 1.

When this position is reached, the pawl 18 is disengaged, when the barrel is adjusted into the loading position, this disengagement being assisted by the compression spring 20 which, as is evident from Fig. 4, is supported, in the ejection position of the cartridge ejector 1 5, via the ball 22 on the supporting face 24 which exerts on the pawl 18 a torque directed in an anti-clockwise direction, so that the pawl 1 8 and, consequently, also the cartridge ejector 1 5 are returned into their original position by means of spring force.

When the barrel is returned to its loading position then, as is known from German Utility Model 6,912,075, a further cartridge is introduced from the magazine 6 into the cartridge store 7.

From the loading position the barrel 3 is moved rearwardly into its firing position, in which the catch 25 cannot engage with the face 27 of the stop 26 so that the ejector 1 5 cannot eject a cartridge from the cartridge store 7.

Claims (7)

1. An explosive-actuated stud setter in cluding a housing and a barrel mounted in the housing in such a manner that it can be displaced only in the direction of its longitudi nal axis, the barrel including a chamber for receiving a cartridge, the said chamber being arranged to extend transversely to the longitu dinal axis of the barrel, the chamber being movable into the firing position and into the loading position by axial displacement of the barrel, and a cartridge ejector which is ar ranged so that when the barrel is adjusted out of the firing position in the direction of the barrel mouth, the ejector is caused to move in a direction towards the mouth of the cartridge chamber and cause a cartridge in the chamber to be ejected exclusively when the barrel is between the firing and the loading positions.

2. A stud setter according to Claim 1, wherein the cartridge ejector includes a pawl which interacts with a stop integral with the housing and which is mounted so that it can pivot to a limited extent about a pin running transversely to the longitudinal axis of the barrel, axial movement of the barrel in the direction of the barrel mouth causing the pawl to pivot temporarily and abut against the said stop on the housing, and to move the car tridge ejector in the ejection direction and to return to the original position when the ejec tion position is reached, the ejector mecha nism being designed to be blocked when the barrel returns from the loading position into the firing position.

3. A stud setter according to Claim 1 or 2, wherein the pawl is elongate and, in the one extreme pivoting position, is urged against the inside of the housing by the restoring force of a spring element, so that it runs alongside and approximately parallel to the longitudinal extension of the housing, the forward end of the pawl having a catch for engaging with the said stop on the housing when the barrel is moved in the direction of the barrel mouth.

4. A stud setter according to Claim 3, wherein the catch has a run-up ramp which interacts with the said stop and which returns the pawl into its original position after the ejection position is reached.

5. A stud setter according to any one of the preceding claims, further comprising a spring element which is arranged to return the pawl into its original position after the ejection position is reached.

6. A stud setter according to any one of the preceding claims, further comprising a prestressed compression spring which is sup ported, at one end on the barrel and, at the other end on the pawl, the pawl having two sloping supporting faces directed differently from one another, the supporting faces being arranged so that one of the supporting faces influenced by the compression spring, exerts on the pawl a torque which urges the latter along its side against the inner wall of the housing, and so that the other supporting face converts the spring force into a torque returns the pawl from the ejection position to its original position.

7. A stud setter according to any one of the preceding claims, wherein a longitudinally running slot is located in the housing, the end face of the slot which faces the barrel mouth acting as a stop face.