EP2115376A1

EP2115376A1 - Dismantlable weapon

Info

Publication number: EP2115376A1
Application number: EP08708398A
Authority: EP
Inventors: Markus Ulrich
Original assignee: Makura AG
Current assignee: Makura AG
Priority date: 2007-01-31
Filing date: 2008-01-30
Publication date: 2009-11-11
Also published as: WO2008092875A8; WO2008092875A1; EP2568249B1; EP2568249A1

Abstract

A weapon (1) has a preferably removable barrel (2), which is fixed on a front shaft (3). This front shaft (3) can be detachably connected to a rear shaft (4) with the aid of coupling means. The coupling means have coupling elements (8), which are associated with the front shaft (3) and the rear shaft (4) and which can be joined together, without any play, by means of a plug-and-rotate movement.

Description

PMAKO O lWO / 30. 01. 08 1 PMAK001WO-200800200 9

Divisible rifle

The invention relates to a divisible rifle having a preferably removable barrel according to the preamble of claim 1. Such a rifle is also referred to in technical language as "take down." Such rifles are known and used for military purposes, but above all as hunting rifles.

The divisibility fulfills two purposes in particular. On the one hand, the barrel can be replaced in this way, for example, to change the caliber of the weapon. For hunting weapons, however, the ease of transport is in the foreground, so that for example in the mountains or on safari the weapon can be stowed in the backpack. On the one hand, this makes it easier to carry the partially heavy weapons, and on the other hand, the sensitive components of the weapon can be protected against knocks and bumps.

Genetically comparable rifles have been known and used for many years. For example, US Pat. No. 1,373,888 already describes a rifle in which the barrel with forearm is fixed to the closure housing or to the buttstock by means of a screw connection. In EP 1 398 594, the barrel is provided with a running sleeve which can be releasably inserted into the slot of a housing sleeve on the buttstock. The locking takes place with positive means. Another solution is described in DE 102 05 503. The barrel sleeve is provided with a nose, which is inserted into a groove on the buttstock. The locking takes place via a piston rod, whose end protrudes from the forend, whereby a spring-loaded ball lock can be released with the piston rod. PMAKO O lWO / 30. 01. 08 9 PMAK001WO-200800200 9

A disadvantage of the known rifles is that the disassembly or assembly of the rifle parts takes too long, because screws or other fastening means must be operated. Often even special tools are required. Another disadvantage is the lack of precision of the connection, so that no repeatable shooting behavior of the weapon is ensured after assembly. In some known rifles, the weapon after use also difficult to share because, for example, conical fits stuck due to thermal expansion.

It is therefore an object of the invention to provide a rifle of the type mentioned, which can be divided quickly and without additional aids and reassembled, with a high precision and thus a reproducible shooting behavior is guaranteed in every situation. This object is achieved according to the invention with a rifle having the features in claim 1.

Coupling elements, which are joined together without play by a plug-in rotational movement, require no tools and the joined end position is always reproducible, without the thermal expansion of the material or the tightening behavior of clamping screws or screws play a role. The coupling elements could be the parts of a bayonet closure. The leadership of the coupling parts takes place here, as is known, radially on a sleeve which is provided with corresponding slots, the counterpart having in the slots engaging bolts.

However, the coupling means are particularly advantageously on the one hand made of a holding plate provided with an opening, wherein the inner contour of the opening is not circular, PMAKO O lWO / 30. 01. 08 3 PMAK001WO-200800200 9

and on the other hand from a clutch disc, whose outer contour at least partially corresponds to the inner contour of the opening, that the clutch disc can be inserted into the opening of the retaining plate, after which the clutch disc is clamped by a relative rotational movement in the retaining plate. The coupling elements engage here apparent end into each other, which allows a particularly space-saving arrangement and a tight fit. Evidently, the inner contour of the opening on the retaining plate may not be circular, because this would not allow overlapping of the contours on the retaining plate or on the clutch disc. In principle, however, the inner contour of the opening on the holding plate could be designed quite differently, such as e.g. elliptical or polygonal. It is also not absolutely necessary that the outer contour of the clutch disc corresponds exactly to the inner contour of the opening on the retaining plate. Required is only a partial overlap of the contours after mating of the coupling elements and after a certain rotational movement.

Further advantages can be achieved if the inner contour of the opening on the holding plate has a plurality of radially recessed recesses and radially projecting retaining webs, and if the outer contour of the clutch disc has a plurality of radially projecting coupling webs, wherein the coupling webs pushed through the recesses on the retaining plate and are rotatable by means of the rotational movement behind the retaining webs. The contact surfaces between retaining webs and coupling webs can be inclined in such a way to a plane lying in the direction of rotation, that in the course of the rotational movement, the coupling means are backlash against each other tensioned. Of course, a play-free cooperation PMAKO O lWO / 30. 01. 08 A PMAK001WO-200800200 9

menfügen also reach in other ways, for example by built-in spring elements or the like.

Particularly advantageous, the clutch disc has a plurality of uniformly angular pitch distributed in a star shape over the circumference coupling webs, wherein the retaining plate has as many recesses or retaining webs. This makes it particularly advantageous to achieve a self-tightening twist lock and a play-free fit of the components. The clamping force of the coupling elements is distributed uniformly over the entire circumference. If eight coupling webs are arranged at an angular pitch of 45 ° on the clutch disc, only a very short rotation of 22.5 ° is required to clamp the two coupling elements.

The retaining plate may be part of a closure housing or it may be connected thereto, wherein the closure housing is integrated in the buttstock. For manufacturing reasons, it is advantageous if the retaining plate is a separate component, which is inserted precisely into an end face of the closure housing and releasably secured by four countersunk screws on this. In this way, the retaining plate made of high-strength chrome steel or even be made of titanium, while the closure housing could for example consist of a high-alloy aluminum material.

The clutch disc may be part of a tether or it may be connected thereto, the tether being integrated into the forend. Again, it is mainly manufacturing reasons or the choice of material, which can make it seem advantageous if the clutch disc is designed as a separate component. This can, for example, by means of a polygon fit accurately on an end face of the PMAKO O lWO / 30. 01. 08 5 PMAK001WO-200800200 9

Staying piece to be held against rotation and be releasably secured by a central fastening screw.

The closure housing and the tether may be latched to each other when reaching the assembled position by means of locking means or be locked together by means of locking means. This ensures that the components can not accidentally come loose.

But it is also conceivable that an anti-rotation device is alternatively or additionally achieved in other ways. Thus, parallel and mutually corresponding guide grooves may be arranged on the closure housing and the running support piece, wherein a closure can be pushed onto the closure housing, which has guide rails guided in the guide grooves, which form an anti-rotation lock between the closure housing and the running support piece.

This closure may, for example, be a straight-pull closure whose locking head engages in the sleeve head of the cartridge chamber assigned to the barrel. It has thus proved to be particularly advantageous to divide the weapon immediately behind the cartridge chamber, so that cartridge chamber and barrel can be integrally formed. This guarantees a high hit reliability despite divisible weapon.

Likewise, it has proven to be useful if the rifle has a receptacle for a telescopic sight, which is completely associated with the barrel attached to the forearm. In this way, the riflescope for the division of the rifle does not have to be removed at all. As you know, the riflescope must be adjusted precisely when placing it in order to achieve accuracy PMAKO O lWO / 30. 01. 08 6 PMAK001WO-200800200 9

to ensure. This adjustment thus always remains even at the pitch of the rifle.

Of course, the closure would not necessarily have to be a straight-pull closure. The invention is not necessarily limited to a bolt action rifle. The division according to the invention could also be used with other types of rifles. Finally, it does not matter if additional parts are removable. For example, the barrel is in any case additionally detachable from the forearm, although connecting screws must be solved.

Further advantages and individual features of the invention will become apparent from the following description of an embodiment and from the drawings. Show it:

1: a side view of a bolt action rifle with telescopic sight in the assembled state,

FIG. 2 shows the bolt action rifle according to FIG. 1 in the disassembled state;

FIG. 3 shows a perspective illustration of a closure housing with inserted holding plate,

FIG. 4 shows a plan view of the holding plate according to FIG. 3,

5 shows a section through the plane I-I at the holding plate according to Figure 4,

FIG. 6 is a perspective view of a tread piece with a disassembled clutch disc; PMAKO O lWO / 3 0. 0 1. 0 8 PMAK001WO-2008002009

FIG. 7 shows the tread piece according to FIG. 6 with inserted clutch disc,

FIG. 8 shows a plan view of the clutch disk according to FIG. 6,

FIG. 9: a side view of the clutch disk according to FIG

Figure 10: a section through plane II-II of the clutch disc according to Figure 8, and

Figure 11: a perspective view of the closure housing and the tether just before assembly.

As shown in Figure 1, there is a rifle 1, in the present case a bolt-action bolt with straight-pull closure of a barrel 2, which is preferably removably mounted on a forearm 3, and from a buttstock 4. The forearm and buttstock consist for example of a multiple glued wood. A closure housing 15, for example made of steel with a trigger 36 is integrated into the buttstock 4 and firmly connected, for example, with screws not visible here. A tether 20, which may also be made of steel, is connected in a similar manner to the forearm 3. The linearly displaceable straight pull closure 29 with its chamber stem 35 sits on the closure housing 15.

On the barrel 2 receiving means 34 are arranged for a telescopic sight 33. PMAKO O lWO / 30. 01. 08 8 PMAK001WO-200800200 9

As can be seen from FIG. 2, the rifle is split directly behind the cartridge chamber 32 between the closure housing 15 and the tread piece 20. The riflescope 33 can likewise be removed, but could also be seen to remain on the barrel 2 when the rifle is split. The gripper pull closure 29 has a locking head 30 which, depending on the position of the closure, projects beyond the closure housing 15 and engages in the sleeve head 31 of the cartridge chamber 32 in the assembled state. Also visible in FIG. 2 is a guide rail 30, in reality a parallel rail pair, on which the closure can be displaced on the closure housing. Also visible in Figure 2 is a clutch disc 8, which is associated with the tether 20. The counterpart of the clutch disc 8, namely the holding plate 5 will be described in more detail below with reference to FIGS. 3 to 5.

Figure 3 shows the substantially approximately cuboid closure housing 15, in which the exhaust device is arranged in a manner not described here in detail. The lock housing also forms the magazine shaft for Nachladepatronen. On the upper side, the closure housing is provided with two parallel guide grooves 27, in which the closure is guided with its guide rails 28. On the front side 16 of the closure housing a retaining plate 5 is inserted accurately.

The holding plate 5 has an opening 6 with an inner contour 7, which radially recessed recesses 10 and radially projecting retaining webs 11 forms (Fig. 4). To the opening 6 a total of four countersunk holes 18 are arranged, which allow the attachment of the holding plate 5 by means of countersunk screws 17. A recess 19 is provided for a latching connection. As can be seen from FIGS. 4 and 5, the retaining webs 11 have only about half of the total width of the complete web. PMAKO O lWO / 30. 01. 08 Q PMAK001WO-200800200 9

zen holding plate 5. The rear abutment surfaces 13 of the retaining webs 11 are provided relative to the plane of the holding plate or to the plane of rotation with a very small angle tilt of, for example, 0.5 ° or less. The opening 6 has a total of eight recesses 10 in a regular angular pitch α of 45 °. The apex lines of the retaining webs 11 and the foot lines of the recesses 10 extend approximately on concentric circles.

Details of the clutch disc 8 and the tether 20 are shown in FIGS. 6 to 10. FIG. 6 shows the tether 20 with an end face 21 in which a polygon recess 23 is embedded. In the center of the polygon recess a threaded bore 25 is arranged. Below the Polygonausnehmung a ball catch 26 is fixed, which carries in a known per se a compressible against a spring tension ball inside. Also on the top of the tread 20 are parallel guide grooves 27 'are arranged, which form a continuation of the guide grooves 27 on the closure housing 15 in the assembled state. About not shown fastening means here, the barrel 2 is fixed with its cartridge chamber 32 on the tether. The sleeve head 31 at the end of the cartridge chamber protrudes slightly beyond the end face 21.

The clutch disc 8 has a specific outer contour 9 which forms a total of eight individual star-shaped coupling webs 12. The clutch disc has a polygonal disk 22 which can be inserted precisely into the polygon recess 23 on the tread piece 20. As can be seen from FIG. 7, the attachment of the clutch disc 8 takes place with the aid of a central fastening screw 24, which can be rotated, for example, via a hexagon socket. PMAKO O lWO / 30. 01. 08 1 0 PMAK001WO-200800200 9

From Figure 8 it can be seen that the coupling webs 12 are also arranged in a regular angular pitch of 45 °. A over the entire outer contour chamfer 37 facilitates the insertion of the clutch disc in the opening of the holding plate. The wall thickness of the individual coupling webs 12 likewise corresponds approximately to half the wall thickness of the retaining plate 5, so that the coupling disc inserted into the retaining plate does not protrude beyond the retaining plate. The contact surface 14 on the coupling webs 12 is similar to the contact surface 13 provided on the retaining webs 11 with the same inclination angle (Fig. 9). From Figures 9 and 10 it can be seen that between the polygon disc 22 and the coupling webs 12 is still a cylindrical collar 38 is arranged.

Figure 11 shows the situation shortly before the assembly of the holding plate 5 and the clutch disc 8. The tread 20 and the clutch disc 8 is brought into the Einschiebeachse 38, and rotated at an angle of 22.5 ° relative to the closure housing 15. Subsequently, the Clutch disc 8 is pushed in the direction of arrow X through the opening 6 of the clutch disc 5 and then rotated in the direction of arrow Y. In this case, the individual coupling webs 12 brace behind the retaining webs 11 on the retaining plate. The rotational movement takes place in a clockwise direction with respect to the viewing plane, wherein the sleeve head protruding beyond the end face 21 can be turned into the correct position on one side of the closure housing 15 because of the recess 39. In the final assembled and tensioned state, the end face 21 is firmly on the support plate 5. The ball of the ball catch 26 engages in the recess 19. Alternatively, for example, on the lock housing 20 or the tether 20, a bolt may be provided which locks the two parts together. After assembling the rifle, the closure can be advanced again so that PMAKOOlWO / 30.01.08 H PMAK001WO-2008002009

the guide rails of the closure also penetrate into the tread piece 20 and thus also cause an anti-rotation.

Claims

claims

A divisible rifle (1) having a barrel (2) mounted on a fore-end (3), the fore-end being detachably connectable to a buttstock (4) by means of coupling means, characterized in that the coupling means are attached to the fore-shaft (3). 3) or the rear shaft (4) associated with coupling elements, which are joined together without play by a plug-in rotary movement.

2. A rifle according to claim (1), characterized in that the coupling means on the one hand consist of a with an opening (6) provided retaining plate (5), wherein the inner contour

(7) of the opening is not circular, and on the other hand from a clutch disc (8), the outer contour (9), at least partially corresponding to the inner contour of the opening, that the clutch disc is clamped by a relative rotational movement in the retaining plate.

3. A rifle according to claim 2, characterized in that the inner contour (7) of the opening (6) on the holding plate (5) has a plurality of radially recessed recesses (10) and radially projecting retaining webs (11) that the outer contour (9 ) of the clutch disc (8) has a plurality of radially projecting coupling webs (12), wherein the coupling webs (12) through the recesses (10) on the holding plate (5) slidably and by means of the rotational movement behind the retaining webs (11) are rotatable.

4. A rifle according to claim 3, characterized in that the contact surfaces (13, 14) between retaining webs (11) and coupling webs (12) in such a way in the direction of rotation Laying plane are inclined, that in the course of the rotational movement, the coupling means are backlash against each other tensioned.

5. Rifle according to one of claims 3 or 4, characterized in that the coupling disc (8) has a plurality of uniformly angular pitch (α) star-shaped distributed over the circumference coupling webs (12) and that the holding plate (5) as many recesses ( 10) or retaining webs (11).

6. Rifle according to claim 5, characterized in that on the clutch disc (8) eight coupling webs (12) are arranged in an angular pitch of 45 °.

7. Rifle according to one of claims 2 to 6, characterized in that the holding plate (5) is part of a closure housing (15) or is connected thereto, wherein the closure housing in the buttstock (4) is integrated.

8. A rifle according to claim (7), characterized in that the holding plate (5) inserted into an end face (16) of the closure housing (15) and releasably secured by four countersunk screws (17).

9. Rifle according to one of claims 2 to 8, characterized in that the clutch disc (8) is part of a tether (20) or is connected thereto, wherein the tether is integrated in the forearm (3).

10. A rifle according to claim 9, characterized in that the coupling disc (8) by means of a polygonal fit (22, 23) precisely on an end face (21) of the tether (20) rotatably held and by means of a central fastening screw (24) is releasably attached.

11. A rifle according to claim 7 and claim 9, characterized in that the closure housing (15) and the tread piece

(20) on reaching the joined position by latching means (19, 26) are locked together or by means of locking means are locked together.

12. A rifle according to claim 7 and claim 9, characterized in that on the closure housing (15) and on the tether

(20) parallel and mutually corresponding guide grooves (27, 27 ') are arranged and in that on the closure housing a closure (29) can be pushed, in the guide grooves (27, 27') guided guide rails (28) which a rotation between Form the closure housing (15) and the tread piece (20).

13. A rifle according to claim 12, characterized in that the closure (29) is a straight-pull closure whose locking head (30) in the barrel (2) associated sleeve head

(31) of the cartridge chamber (32) engages.

14. A rifle according to claim 12 or 13, characterized in that it comprises a receptacle (34) for a riflescope (33) which is completely associated with the barrel (2) fixed to the fore-end 3.