FI59744B - PULVERKRAFTSDRIVEN INDRIVNINGSANORDNING ELLER BULTPISTOL - Google Patents

Description

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jSlA LB] (11) UTLÄGGNINGSSKRIFT 5 9 744 C (45) Pater, 1:11,:, y .n, :: tty IP 10. . = 1 ytjM Patent sseddeiat '(51) Kv.lk?/lntXI.3 B 25 C 1/10 FINLAND — FINLAND (21) 3191/71 * (22) Hukumtapilvt— AmBknlngadag 31 · 10 · 7 ^ * (23) AlkupUvi — GIM | h «ud« (31-10-7 ^ (41) Gotten Stuck - Bllvlt offuntllj 15.06.75

Patent Registration Board ..... . .

_ *. (44) Date of issue of the notice. -

Patents and registries' Antttku utitgd och utUkrWtun pubiictnd 30.06.81 (32) (33) (31) Pyj ^ «« y ttuoiktut— Bugird pHorittt lU. 12.73 S ak s an Li itt ot as avalt a-Fö rbun dsrepubl i ken Tyskland (DE) P 2362321.lt (71) Hilti Aktiengesellschaft, Schaan, Liechtenstein (Li) (72) Elmar Maier, Feldkirch-Tisis', Austria- Österrike (AT)

Robert Tilg, Schaan, Liechtenstein (Ll) (7! *) Leitzinger Oy (5 ^ +) Powder-powered nailing device or bolt gun -

Pulverkraftsdriven indrivningsanordning eller bultpistol

The invention relates to a powder-powered nailing device, i.e. a bolt gun, having a housing and an axially movable barrel at least partially arranged therein, consisting of at least two axially displaceable and axially displaceable barrel parts, a shutter body and an igniting mechanism, wherein the barrel portions, by pressing against the receiving end of the front barrel portion against the mouthpiece, are adapted to be axially displaceable to the ignition position where the rear end of the rear barrel portion encounters a stop in the closure body.

In devices of this type, it has been necessary for the rear barrel part containing the cartridge storage to be in direct agreement with the ignition mechanism in order to achieve the ignition-ready position.

Known devices of this type are most often arranged in such a way that both barrel parts in the rest position are disconnected by the force of springs from the ignition mechanism. In this case, the charge in the charge tank of the rear chimney section cannot be reached in the rest position of the igniter.

It is only when the device is pressed against the nailing base that the barrel parts are guided back to the stop on the ignition mechanism, so that during the operation of the release mechanism the ignition striker reaches the charge and ignites it.

59744 2

In nailing devices with a multi-part barrel, it has been necessary, mainly for operational reasons, to guide both barrel parts back to their front rest position by means of separate spring members when the device is not pressed onto the nailing base. However, it has been found that such devices do not rule out the risk that due to unavoidable dirt or thermal expansion of the device, a barrel portion may engage the housing so that spring force can no longer guide it back to the rest position when the device is lifted from the nail receiving platform.

If it then happens that the rear part of the barrel containing the cartridges is no longer guided to its rest position, the cartridges then remain in the region of the ignition mechanism and can thus become ignited. There are, of course, considerable dangers associated with such unintentional ignition.

The object of the invention is to improve said type of device so that the cartridges in the drum magazine cannot be inadvertently ignited and that this improvement can be realized with a small space requirement and a reliable mechanism.

To achieve this object, a powder-nailing device according to the invention, i.e. a frame pistol, is characterized in rotatable about its longitudinal axis, and has a release latch for releasing ignition by rotation, the release latch having a recess that the latch cam engages when the front barrel portion is not pressed against the receiving base.

Ignition of the cartridge is thus only possible if both the rear and the front barrel part are in their rear position. If the device is raised again from this base after it has been pressed onto the nailing platform without the action of ignition, the front barrel part will be moved forward by the force of the spring. In this case, 3 59744 also locks the latch in a position that prevents the ignition detachment from being removed. In addition, direct engagement of the latch with the ignition striker can avoid institutional clearances, which increases operational reliability.

In order to allow easy replacement of the front barrel part without special tools, it is preferred that the latch is connected to a radially resiliently engaging latch which engages in the longitudinal groove of the front barrel part. The front silicon braid can thus be released when the latch is removed, so that this can simply be removed from the device.

To re-guide the latch more securely from the release position to the secure position when the front barrel portion is not pressed against the base, a spring is provided which re-engages the latch with the release latch recess. This also ensures that the latch always engages at its full width.

The bolt gun locking device according to the invention is particularly useful in the device according to DE-A-2 345 054. In this case, it is preferable to form the rear barrel portion into a drum magazine. An important requirement for such a device is that the front barrel part and the drum magazine are independently axially displaceable and each part can be guided separately rearwards, since the drum magazine must also be rotatable along with the axial movement.

An embodiment of the invention will now be described with reference to the accompanying drawing, which shows a bolt gun according to the invention in the rest position and in cross-section.

The frame pistol according to the invention consists essentially entirely of a housing marked 1 and a closure body 2 to which a handle 3 is attached. The closure body 2 is connected to the housing 1 by screws 4.

4 59,744

In the front part of the housing 1, the barrel 5 is limited to an axially displaceable fit. With the spring 6, this is moved forward in the rest position of the device, i.e. when it is not pressed against the receiving medium. In the main part of the housing, the protective cover 7 is fastened with a pin 8. Behind the barrel 5, the drum magazine 9 is rotatably arranged on the shaft 10 and is limited to be axially displaceable. In the bores 9a parallel to the axis of rotation, the drum magazine 9 has cartridges 11 and bolts 12. On the end side bordering the barrel, the bores 9a are provided with outwardly conically expanding notches 9b. These are fitted backwards to the conically tapered end 5a of the barrel 5 and together with this give a centering and sealing effect. Through the spacer 13, the drum magazine 9 is pressed by a compression spring 14 against the front abutment surface 1a. In the shutter body 2, the ignition striker 15 is adapted to be axially displaced and rotated about a longitudinal axis. The igniter 15 is non-rotatably connected to the release pin 16, which in turn is turned at the front to a rotational position developed by spring force.

The ignition spring 17 moves the ignition striker forward in the spacer 13 against the gripper 18 in compression. A compression spring 24 is placed between the igniter 15 and the closure body 2 so that the igniter 15 in the non-tuned state of the device is in the back-weight position behind the retainer 18.

By pressing the device against the fastener, the barrel 5 is first moved backwards until it comes into contact with the drum magazine 9. Thereafter, the barrel 5 and the drum magazine 9 are moved backwards against the spring 14 via the spacer 13 until the drum magazine rests against the front end surface 2a of the closure body 2. By retracting the spacer 13, the retractor 18 is also moved backwards, whereby this moves the ignition striker 15 back to the rearmost position. The ignition switch 15 is thus in the ignition position. By turning the release lever 16, the igniter 15 is also rotated, whereby the notched recess of the igniter 15 is behind the taker 18. The ignition stroke 15 is then released and, by the action of the ignition spring 17, it is thrown forward, whereby ignition of the cartridge 11 can take place.

In order to prevent the release of the igniter 15 in connection with the non-compressed barrel 5, but for example by pressing the drum magazine s 59744 9 into the rear position, the latch 19 engages the recess of the release latch 16.

The latch 19 is connected to a rod 20 which is pressed by a spring 21 against the latch 22. The latch 22 is pressed by a leaf spring 23 into the longitudinal groove 5b in the barrel 5. In the rest position of the device, the latch 22 is in contact with the abutment surface Ib. In the rear displacement of the barrel 5, the latch 19 is moved backwards via the latch 22 and the rod 20, whereby the latch 19 is released from engagement with the release latch 16. The release of the igniter 15 is thus only possible with the back-pressed barrel 5 and the back-moved drum magazine 9.

Claims (4)

6 59744 A powder nailing device, i.e. a wooden pistol, having a housing and an axially movable barrel at least partially arranged therein, comprising at least two chimney parts arranged in succession on the shaft and axially opposed, a shutter body and a firing mechanism having a spring, a spring by pressing against the mouth end of the front barrel part against the receiving material, are adapted to be axially displaceable at the ignition position where the rear end of the rear barrel part faces a stop in the closure, characterized in ) and can be detached to the release position by pressing the front barrel part (5) to move the barrel parts axially to the ignition position and that the ignition chuck (15) is adapted to rotate about its longitudinal axis and has i a release latch (16) for releasing ignition by rotation, the release latch having a recess in which the cam of the latch (19) engages when the front barrel portion (5) is not pressed against the receiving base. A wooden pistol according to claim 1, characterized in that the latch (19) is connected to a radially resiliently fitted latch (22) which engages in the longitudinal groove (5b) of the front barrel part (5). A frame pistol according to claim 1 or 2, characterized in that a spring (21) is provided for returning the latch (19) from the release position to the securing position when the front barrel part (5) is not pressed against the base. Bolt setting device according to one of Claims 1 to 3, characterized in that the rear barrel part is formed as a drum magazine (9). IM »