WO2004029536A1

WO2004029536A1 - Device for locking a closure in a repeating weapon

Info

Publication number: WO2004029536A1
Application number: PCT/EP2003/009491
Authority: WO
Inventors: Johannes Murello
Original assignee: Heckler & Koch Gmbh
Priority date: 2002-09-04
Filing date: 2003-08-27
Publication date: 2004-04-08
Also published as: KR100671587B1; ZA200501825B; AU2003255487A1; EP1535014A1; DE10240888A1; CA2496992A1; KR20050062545A

Abstract

The invention relates to a repeating weapon comprising a closing head (11) which can be displaced in the direction of the shot or longitudinal direction thereof and a locking block (25) which can be displaced in a transversal manner thereto. Said locking head is used to secure the closing head (1) and can be inserted in recesses (5, 6, 21) and can be inserted into the weapon housing (1, 2). The inventive weapon also comprises a handle (65) for displacing the closing head (11) back and forth, in addition to inserting and releasing the locking block (25). Said weapon is provided with a closing carrier (13) which can be displaced in a parallel manner in relation to the closing head (11) by means of an initial path and an end path, entraining said closing head on the end path. At least one inclined surface (57) is formed on the closing carrier (13). Said inclined surface engages with a counter surface on the locking block (25), causing said locking block to become removed or introduced when the initial path is reengaged. Preferably, the repeating weapon is embodied in the form of a shotgun, or more preferably, a pumpgun.

Description

DEVICE FOR LOCKING A BOLT IN A BULLET RIFLE

The invention relates to a repeating rifle with a breech head movable in the weft or longitudinal direction, a locking block movable transversely thereto, which can be inserted into the recesses in this and in the weapon housing for fixing the breech, and a handle for moving the breech head back and forth and for insertion and releasing the locking block (preamble of claim 1).

In this document, position and direction information such as "front" or "top" are generally based on a rifle in the normal firing position that shoots horizontally towards "front".

Soon after the appearance of repeating rifles with cylinder locks, attempts were made to simplify the loading movement. The shooter had to make a transverse movement, a backward movement, a forward movement and again a transverse movement for loading by hand. A kind of worm gear was therefore introduced, which transformed a simple backward and forward movement into the above-mentioned complicated movement. Because of the complicated mechanics, these so-called straight-pull systems either did not work or were too expensive. In these known systems, the actual closure or closure head is assigned a slide which could be regarded as a closure carrier.

There are other systems to simplify the loading movement. Such a system is outlined in the preamble of claim 1 and was even implemented before the straight-line systems mentioned above: the breech can be moved forward in a straight line until the cartridge bottom is reached in the cartridge chamber. If he has reached the final position, a cross slide or locking block is moved into recesses in the breech and in the weapon housing and thus locks the breech. A lower lever is swung downwards in an arcuate movement and releases the locking block on an initial stretch. When a final route is covered, the unlocked lock is then withdrawn. Only when the lower lever is pivoted upward is the lock closed and locked. A box magazine has also been known for this system since 1895.

Similar systems are not operated by a lower lever, but by a slide that can be moved in a straight line and is connected to the forearm. There, however, the locking block pivots.

All of the systems described are quite complicated and correspondingly complex and sensitive.

With the locking blocks of lever and fore-end loaders, especially with strong cartridges, high surface pressures occur. These can only be counteracted by bulky construction or extremely high accuracy.

Robustness, small dimensions and reliability should work together at a low price, especially for weapons for emergency use. After all, such weapons should only be used in rare emergencies, but should then function safely under adverse circumstances.

The object of the invention is to develop the repeating rifle mentioned at the outset so that at least some of the above difficulties are at least partially avoided.

A straight-line repeating rifle that is particularly suitable for emergency use should preferably be created, but also for use by troops, the police or the like.

This object is achieved in that a breech carrier is provided in the rifle mentioned above, which is movable parallel to the breech head over an initial and an end section and takes it along the end section, and that at least one inclined surface is formed on the breech holder, which is formed in a Counter surface engages on the locking block, such that the locking block is released or inserted when covering the initial distance (claim 1).

The longitudinal slide of the straight-line lock described above is used to a certain extent

To operate the locking block, which is known from the lever loader. The breech head can be kept very short, which reduces the overall length of the rifle. Since the longitudinally movable fastener carrier does not have to lie against the locking block in the longitudinal direction, the path of movement of the fastener carrier need not be precisely defined, but rather only be long enough.

It is even expedient for the closure carrier to be able to move over a lost motion path in front of the start section, in which the closure remains locked (claim 2). This lost motion not only compensates for structural inaccuracies, but also enables the shooter to gather momentum. The locking block is thus only unlocked by the closure carrier when it has already picked up speed. A slightly stuck breech block is simply taken along, perhaps even without the shooter noticing the fault.

A preferred development of the invention is that the weapon housing from the rear end of the barrel or a barrel receiving sleeve and from a plastic Housing is formed, and that the recesses in the weapon housing are formed at the rear end of the barrel or in the barrel-receiving sleeve (claim 3). When firing, the main forces that occur are directly introduced into the barrel by the breech head via the locking block. The actual plastic housing only absorbs parasitic forces, leads moving parts if necessary and protects all parts from dirt.

Because of the large degree of structural freedom, the rifle of the invention can be given virtually any appearance. The handle for the closure carrier can be the handle, the forearm, but also a lower lever or simply a handle that protrudes from the (plastic) housing on the side, front or rear.

It is also proposed according to the invention that the firing pin is attached directly to the breech head, in particular crosses it (claim 4).

However, the cartridge could be ignited if the breech head was still on the cartridge, regardless of whether the breech was locked or unlocked.

To prevent this, it is proposed in a further embodiment of the invention that a locking block is assigned to the locking head, which is penetrated freely by the firing pin in a locking position and locks the firing pin in a retracted, inactive position in an unlocked position (claim 5). The locking block thus acts as a kind of security, because the trigger can only ignite the cartridge when the breech head is locked.

This embodiment of the invention is further improved in that the locking block has a bevel with which it moves the firing pin into the unlocked position during the transition from the locked to the unlocked position. withdrawing effective position (claim 6). For example, if the firing pin gets stuck in the primer during the shot due to a cartridge error, then it is released by the locking block by its movement when unlocking and brought into an ineffective position.

According to a further preferred embodiment of the invention, this locking block can be moved into and out of the locked position transversely to the axis of the soul in the locking head. In addition, it passes through the breech head and, in the locked position, falls into a recess in a component which is formed in one piece with the barrel or is firmly connected (claim 7). The incidence preferably takes place at three locations approximately evenly distributed over the circumference. With a shotgun in particular, a generous over-dimensioning of the recess and locking bolt is possible because of the cartridge size. The locking bolt is preferably slightly chamfered in the section which engages in the recess, so that a gentle locking (especially with large housing tolerances) and releasing the locking is always possible.

The closure carrier can be designed to be movable along the side of the closure head opposite the recess. The locking block has a front and a rear skirting board and the fastener carrier has a front and a rear carrier bar, in such a way that the - retracting fastener carrier runs with its front carrier bar against the front skirting board of the locking block during advanced rewinding to get it out of the Pull the recess and and when the closure carrier closes, its rear driver strip runs against the rear baseboard of the locking block in order to press it into the recess, wherein at least one of the front or rear foot and driver bar is beveled (claim 8).

When the locking head is locked, the locking carrier can be freely moved forward beyond the position which it assumes after locking has been completed. If, on the other hand, the closure carrier moves backwards from this position, then after covering a more or less large lost motion distance it pulls the locking block out of the recesses and then also takes the closure head with it. It is immaterial how large the play is that is formed between the skirting boards of the locking block and the driver bars of the locking head. It is only essential that the

Fit baseboards into the opening formed in the fastener carrier between the carrier bars.

Thus, a simple and less precise production is possible; inaccurate parts or spare parts can be installed without further adjustment.

The weapon according to the invention can be used, for example, for small-caliber repeaters. However, the system according to the invention is particularly suitable for a repeating shotgun (claim 9), preferably a forearm repeater.

Overall, the system of the present invention proves particularly suitable for a multi-loader for large cartridges, especially for cartridges with a caliber of more than 15 mm, especially since the two or more extractor claws then reliably hold and guide the very large cartridge. The repeater lock can also be used for a self-loading machine by connecting a reloading mechanism, such as a gas piston rod, to the handle or a pivot point provided instead. The subject matter of the invention is explained in more detail with the aid of an exemplary embodiment and the attached schematic drawing. In this show:

1 shows a longitudinal section through the rear part of the barrel and the breech of a shotgun according to the invention, with the breech closed and locked.

FIG. 2 shows a section as in FIG. 1, but with the breech unlocked and immediately after a shot has been fired;

3.1 shows a longitudinal section through the closure carrier, on a slightly enlarged scale compared to FIGS. 1 and 2;

3.2 shows a perspective view of the closure carrier shown in FIG. 3.1 obliquely from above;

4 shows a cross section through the rearmost part (end section) of the running piece along the central axis of a locking recess;

5.1 is a view of the locking block from behind;

5.2 is a side view of the locking block;

6 shows a view of the closure approximately in the state shown in FIG. 1, obliquely from above;

7 shows a greatly enlarged extractor claw; and

8 is a side view of the disassembly block; and 9 shows a section along the line IX-IX through the disassembly block of FIG. 8.

The drawing shows an exemplary embodiment of the invention. It is therefore only referred to individual figures of the drawing in the following if this makes it easier to find a specific element / feature.

The rifle, which is only partially shown, is a repeating shotgun which can be provided with a box magazine (FIGS. 1, 2). The shotgun has a barrel 1 with a central axis or core axis 37. In the rear part of this barrel piece, a cartridge chamber 3 is formed, to which an end section 4 of the barrel piece 1 connects to the rear. The end section 4 has an approximately U-shaped cross section which is open at the bottom (FIG. 4) and has a central, upper locking recess 5 and two locking notches 6 at the bottom. The latter sit in the free ends of the two legs of the U-section. Approximately halfway up each U-leg there is a groove 10 which runs parallel to the core axis 37 and in which a cartridge extractor 61 (FIG. 6) can run.

The cartridge chamber 3 is closed by a breech head 11 when the weapon is ready to fire. This is penetrated by a front vertical transverse bore, which in turn receives a locking block 25. This locking block has an inverted T-shaped cross section transverse to the axis of the core (FIGS. 5.1 and 5.2); with a conical locking extension 7 at the free (upper) end of the central shaft and one locking finger 8 at each of the two ends of the (lower) transverse shaft.

In the locked position, the locking extension 7 engages in the locking recess 5 and at the same time the locking fingers 8 into the locking notches 6.

All engagement surfaces are inclined to the vertical in order to enable the locking block 25 to be engaged and released in the end section 4 of the running piece 1 with ease. However, the oblique angles of the surfaces are so low that the engagement is self-locking, that is to say cannot be opened to the rear by a force on the closure head 11 along the core axis 37.

Running piece 1 and breech head 11 are thus directly connected to one another during the shot and transmit the high initial forces directly to one another. No other element is affected by the power transmission. The rear end of the running piece 1 can therefore be embedded in a plastic housing 2. The greatest forces occurring are not introduced into the housing 2.

The closure head 11 sits on a closure carrier 13 (Fig. 3.1 and 3.2). This is movable relative to the closure head 11 by a certain distance. The closure carrier 13 has: a longitudinal recess 54, a transverse recess 53 in the region below the locking block 25, and behind this a flat surface 59.

To the front, the transverse recess 53 is delimited on both sides of the longitudinal recess 54 by a nose 55, which projects upwards and backwards and projects beyond the flat surface 59.

The locking block 25 is designed so that in its upper locking position the lower surface of its transverse shaft is approximately flush with the lower surface of the locking head 11 (Fig. 1). In this position, the closure carrier 13 can move back and forth under the locking block 25, and the lock closing head 11 and the locking block 25 slide on the flat surface 59 of the closure carrier 13.

If the closure carrier 13 moves backwards over the rest position shown in FIG. 1, then its two lugs 55 grasp the transverse shaft of the closure block 25 on both sides with their rear edges and pull it downward into the transverse recess 53. This position is shown in FIG. 2 shown. In it, the locking block 25 is released from the end section 4 of the barrel 1. The locking head 11 can now move backwards relative to the barrel 1.

During its further backward movement, the unlocked locking head 11 runs in a guide (not shown) in the housing 2 such that the locking block 25 cannot move upward.

When closing the breech head 11, it runs on the rear end of the cartridge chamber 3 or cartridge bottom. The closure carrier 13 is then pulled or pressed further forward by a closing spring 9 (only indicated schematically as a direction of force). Here, a bevel 57 forming the rear wall of the transverse recess 53 loads the locking block 25 in the upward direction, that is, pushes it upwards during its forward movement until finally the flat surface 59 engages under the locking block 25 and the position of FIG. 1 is reached again.

In the locking head 11, a rotatable disassembly block 27 is arranged behind the locking block 25 and approximately parallel to the central shaft thereof, which block is held in its position of use by a catch 28 (FIGS. 1, 2, 6 and 8, 9). The disassembly block 27 is received in a rear, vertical transverse bore 23 in the closure head 11. The locking block 25 and the disassembly block 27 are penetrated by a firing pin 19 and each have a bore 31 and 34 for this purpose.

The lower end of the disassembly block 27 is designed as a hammer foot 51, which runs in the longitudinal recess 54 with an inverted T-shaped cross section in the closure carrier 13. In the operating state, i.e. In the position of use, in which the hammer foot 51 engages under the flanks of the groove 54 on both sides and the disassembly block 27 is held by its catch 28, a shoulder 35 of the firing pin 19 runs against a projection 36 behind it in the bore of the disassembly block 27. This prevents the firing pin 19 from falling out of the locking head 11 in the position of use. If the disassembly block 27 is rotated about an eighth of a turn after overcoming the detent 28, the firing pin 19 can be removed to the rear. Since in this state the hammer foot 51 still engages under the upper flanks of the groove 54, the locking head 11 and the locking carrier 13 still remain assembled, while the firing pin 19 can be replaced. Only a full quarter turn of the disassembly block 27 (only possible after the firing pin 19 has been removed) releases the hammer foot 51 from the groove 54 and the locking head 11 can be lifted off the locking carrier 13.

The bore 31 penetrated by the firing pin 19 in the locking block 25 is formed as an elongated hole which allows the locking block 25 to assume the positions of FIGS. 1 and 2 (locked and unlocked) despite the presence of the firing pin 19.

The firing pin 19 has a thickening 29 behind the elongated hole 31, while in the rear of the elongated hole 31, a beveled recess 33 complementary to the thickening 29 is formed at the bottom. The recess 33 and the firing pin thickening 29 are designed that the firing pin 19 can only dip into the slot 31 when the locking block 25 is in its uppermost position (locking position of FIG. 1). In this position, the firing pin 19 can penetrate so deeply into the elongated hole 31 that its tip can come out of the front face of the breechhead 11 to ignite a cartridge.

If the locking block 25 is lowered, the recess 33 presses the firing pin thickening 29 back so far due to its special shape that the firing pin tip can no longer reach a cartridge. This ensures that a cartridge can only be fired if the breech head 11 is locked sufficiently.

As described, thickening 29 and paragraph 35 hold the firing pin 19 loosely between two end positions; the beveled recess 33 of the locking block forces the firing pin to be pulled back when unlocking. A firing pin spring is therefore usually superfluous and therefore need not be provided.

A handle 65 is attached to the closure carrier 13 and is connected, for example, to a displaceable fore-end. A releasable lock could fix this handle in the foremost position. The handle and thus the breech carrier are moved back and forth to load the weapon.

When the handle 65 is pulled back, the lock carrier 13 is pulled backwards, with its lugs 55 pulling the locking block 25 downward and then taking the lock head 11 with it during its further backward movement. The rear end of the closure carrier 13 tensions the cock of a known knock-off mechanism, not shown here, and carries out a loading movement. When the handle 65 is pushed forward Locking block 25 pushed up again in the manner described above and supported from below with the flat, upper surface 59 of the closure carrier 13. It is completely irrelevant whether the closure carrier 13 is one millimeter further forward or not. Tolerances on one another therefore have no influence.

An advantage of the closure 11, 13 shown is that in its unlocked state (FIG. 2) the

Front surface of its closure carrier 13 protrudes a little over the front surface of the closure head 11. In this way, a cartridge can be conveyed upwards without its bottom catching on a cartridge extractor or on any projection of the front surface of the closure head 11. The closure head 11, which is not burdened thereby, also does not endeavor to lock "on the way".

As can be seen in FIG. 6, the breech head 11 in this exemplary embodiment unusually has two cartridge extractors 61 located opposite one another. Such a cartridge extractor 61 is shown further enlarged in FIG. 7. As can be seen, it has a hook-like design with a rear-facing hook surface 63, which is intended to sit on the edge of a shotgun cartridge from the front. This edge is curved forward and outward, so that the hook surface 63 rests on a curved formation. Depending on whether the cartridge ejector (not shown) is arranged on the right or left, the cartridge case is ejected to the left or right. It is essential, however, that no eccentric longitudinal or transverse force acts on the cartridge case when it is pulled out, which could result from a single cartridge extractor 61. This ensures that even very long cartridge cases are pulled out properly. Only near the end of the return path of the breech does an eccentric force act on the cartridge sleeve, which causes their release first from one and then from the other cartridge extractor 61.

For the rest, you only have to move the ejector when changing from right to left ejection. The two cartridge extractors 61 remain where they are.

Claims

claims

1. Repeating rifle with a breech head (11) movable in the weft or longitudinal direction, a locking block (25) which is movable transversely thereto and which is used to fix the breech head (11) in recesses (5, 6, 21) in it and in the weapon housing (1, 2) can be inserted, and a handle (65) for moving the locking head (11) back and forth and for inserting and releasing the locking block (25), characterized in that a locking carrier (13) is provided which is parallel to the Locking head (11) is movable over an initial and an end distance and takes it along on the end route, and that at least one inclined surface (57) is formed on the closure carrier (13), which engages in a counter surface on the locking block (25), such that the locking block (25) is released or inserted when the initial route is covered.

2. repeating rifle according to claim 1, characterized in that the breech carrier (13) is movable before the beginning distance over a lost motion distance, in which the breech head (11) remains locked.

3. Repeating rifle according to one of claims 1 or 2, characterized in that the weapon housing (1, 2) from the rear end of the barrel (1) or a barrel receiving sleeve and a plastic housing (2) is formed, and that the recesses ( 5, 6) are formed in the weapon housing (1, 2) at the rear end of the barrel (1) or in the barrel receiving sleeve.

4. Repeating rifle according to one of the preceding claims, characterized in that the breech head (11) is crossed by a firing pin (19).

5. Repeating rifle according to claim 4, characterized in that the breech head (11) is traversed by a locking block (25) which is freely movable in a locking position by the firing pin (19) and in an unlocked position the firing pin ( 19) locks in a withdrawn, ineffective position.

6. Repeating rifle according to claim 5, characterized in that the locking block (25) has a bevel (33) with which it takes the firing pin (19) back into its inactive position during the transition from the locked to the unlocked position.

7. repeating rifle according to one of the preceding claims, characterized in that the locking block (25) is movable transversely to the breech head (11) in and out of the locked position and in the locked position in a recess (5) in a component (4) , which is integrally formed with the barrel (1) or firmly connected.

8. repeating rifle according to claim 7, characterized in that the locking block (25) has a baseboard (8) with a front and a rear guide surface and - the breech carrier (13) on the baseboard (8) facing side of the breech head (11) is arranged, has a front and a rear carrier bar (55, 57), such that when the return progresses, its front driver bar (55) against the front guide surface of the foot bar (8) of the locking block (25) runs to pull the latter out of the recess (5) and possibly out of the locking notches (6), and - during its closing movement with its rear

Carrier bar (57) runs up against the rear guide surface of the foot bar (8) of the locking block (25) in order to press the latter into the recess (5) and, if necessary, the locking notches (6), whereby the front or rear foot and driver bar (53, 55, 57, 59) each has at least one beveled.

9. repeating rifle according to one of the preceding claims, characterized in that it is shot cartridges or other cartridges with a caliber of more than 15 mm.

10. repeating rifle according to one of the preceding claims, characterized in that instead of the handle (65) a point of attack is provided for an automatic through-loading mechanism.