JP2010002086A - Expansible gunstock for gun - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an expansible gunstock for a gun constituted to surely fix a gunstock rear body to a gunstock front body by a simple constitution even if an impact caused by the fall or the like of the gun is repeated. <P>SOLUTION: An insertion rod 16 has a plurality of pin fitting holes 24 at longitudinal spaces, and an engaging pin 11 engaged with the pin fitting holes 24 is fittingly inserted into a pinhole 9 formed at the gunstock front body 2. The engaging pin 11 is movable by a lever member 28 provided at the gunstock front body 2, and the operation of the lever member 28 causes the engaging pin 11 to be engaged with and detached from the pin fitting hole 24 of the insertion rod 16 inserted by a predetermined quantity into a fitting insertion hole 4 of the gunstock front body 2. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a telescopic base that can change the length of the base.

Conventionally, as described in Patent Documents 1 and 2, a telescopic base that can change the length of the stock is opened rearward to a stock front part (support cylinder) that can be attached to the engine part of the gun. A longitudinal insertion insertion hole is provided, and an insertion rod (support rod) of the rear buttock body is movably inserted into the insertion insertion hole, and a predetermined amount of insertion rod (support rod) is inserted into the insertion hole. It is known to change the length of the stock. And in patent document 1, a pair of engaging pins which operate | move by the movement of the operation member with which the stockstock rear part was equipped are provided in the front-end part of an insertion rod, and a pair of pin fitting hole which engages / disengages the pair of engaging pins A plurality of insertion holes are provided in the front-rear direction of the insertion insertion hole, a predetermined amount of insertion rods are inserted into the insertion insertion holes, and the pair of engagement pins are engaged with the pair of pin engagement holes, thereby fitting the hole in the front part of the stock. An insertion rod that is inserted in a predetermined amount is fixed. Further, in Patent Document 2, the support rod inserted into the support cylinder by a predetermined amount is fixed by engaging a screw screwed to the rear end portion of the support cylinder with a locking groove formed in the support rod. It has become.
JP 2008-8525 A US Pat. No. 6,560,911

In the above-mentioned patent document 1, an operation rod engaged with a pair of engagement pins provided on an insertion rod is moved back and forth by an operation member provided on the rear part of the stock. However, since the operation rod and the operation member are connected by the bolt member, if the impact due to the dropping of the gun or the like is repeated, the bolt member loosens and the operation rod is detached from the operation member, and the pair of engagement pins are securely connected. There was a possibility that it could not be activated. Also, since the pair of engagement pins are moved along the cam groove formed at the front end of the insertion rod, the engagement pin cannot be moved smoothly due to wear of the cam groove, and the length of the stock base There was a risk that changes could not be made promptly. In Patent Document 2, since the screw is engaged with the locking groove, if the impact due to the dropping of the gun or the like is repeated, the screw is loosened and the support rod may move. Further, since the screw is provided outside the support cylinder, the screw is easily damaged, and there is a possibility that the length of the stock can not be changed.
In view of the above problems, an object of the present invention is to provide a telescopic gunstock for a gun that has a simple structure and reliably secures the rear part of the gunstock to the front part of the gunstock even if the impact of the gun dropping or the like is repeated. The purpose is to provide.

  The present invention provides a front and rear fitting insertion hole that opens rearward in the front part of the gun stock that can be attached to the engine part of the gun, and the insertion rod of the rear part of the stock can be moved in the front and rear direction in the fitting insertion hole. In the telescopic base of the gun, the insertion rod is fixed to the front of the stock with the insertion rod inserted into the insertion hole by a predetermined amount, and a plurality of the insertion rods are spaced apart in the front-rear direction. A pin hole provided in the front part of the stock, and an engagement pin that engages with the pin fit hole is inserted into the front part of the stock and the engagement pin is manually inserted into the pin hole. The operation pin is moved along, and the engagement pin is engaged with and disengaged from the pin engagement hole of the insertion rod inserted into the insertion hole by a predetermined amount by the operation of the operation unit. Specifically, the operating means is a lever member that is pivotally supported by a shaft member provided in the front of the stocket, and engages one of the lever members with the engagement pin and swings one of the lever members into engagement. The pin is moved along the pin hole. In addition, a storage hole in the front-rear direction that opens in front of the insertion rod is provided, and a spring member is interposed between the end face of the front end of the buttstock and the end face of the storage hole. The insertion rod that has been released from the combined state is moved rearward.

  In the present invention, the insertion rod is provided with a plurality of pin fitting holes at intervals in the front-rear direction, and the engagement pin that engages with the pin fitting hole is inserted into the pin hole provided in the front part of the stock. The front body is provided with operation means for manually moving the engagement pin along the pin hole, and the engagement pin is engaged with the pin engagement hole of the insertion rod inserted into the insertion insertion hole by a predetermined amount. By removing it, it is possible to move the engagement pin reliably by the lever member engaged with the engagement pin even if the impact due to the dropping of the gun or the like is repeated. Further, since the engaging pin moves along the pin hole by the operation of the lever member, the engaging pin can be moved along the pin hole even if the engaging portion between the lever member and the engaging pin is worn. It becomes. Further, a spring member is interposed between the mounting hole of the front buttstock member and the insertion hole of the insertion rod, and the rear buttock body is moved backward by the spring member, so that it is only necessary to move the rear buttock body forward. It becomes possible to change the length of the stock.

  1 includes a gun stock front body 2 whose front end can be attached to a gun engine part (not shown), and a gun stock rear body that can be attached to the gun front front body 2 so as to be extendable in the front-rear direction. It consists of three. The gunstock front body 2 will be described. A front-to-back body 2 is provided with an insertion hole 4 in the front-rear direction that opens rearward. Further, the front part 2 of the buttstock is formed with a fitting recess 5 that can be fitted into a fitting part of an engine part (not shown) at the front end, and a partition wall 6 between the fitting recess 5 and the fitting insertion hole 4. The mounting screw 7 is held rotatably in a state where it is prevented from coming off. A projection 8 is formed at the rear end of the stock front body 2 so as to project downward, and a vertical pin hole 9 is formed in the projection 8 so as to open into the fitting hole 4. The pin hole 9 is continuously provided with a through hole 10 that opens on the lower surface of the protrusion 8. An engagement pin 11 that engages and disengages with a pin fitting hole 24 described later is fitted into the pin hole 9. The engaging pin 11 includes an engaging portion body 12 and a shaft portion 13, and the tip end of the shaft portion 13 protrudes outward of the protruding portion 8 through the through hole 10. Further, the first spring member 14 is interposed between the engaging portion body 12 and the lower surface of the pin hole 9 so that the front end of the engaging portion body 12 of the engaging pin 11 protrudes inside the insertion hole 4 by the spring force. It has become.

  Next, the rear stock 3 will be described. The rear stock 3 includes a resin or metal shoulder body 15 formed in a well-known shape, and a resin or metal insertion rod 16 projecting forward from the shoulder body 15. ing. The shoulder support main body 15 has a plurality of mounting holes 17a and a hard resin substrate 17 having a mounting hole 17b at the center, and a soft resin that is mounted integrally on the rear side of the substrate 17 using the mounting holes 17a. And a resin shoulder front member 20 attached to the front side of the substrate 17 by a mounting screw 19 inserted into the mounting hole 17b. Locking windows 20a are formed on the side walls of the shoulder shoulder front member 20 on both sides, and metal mounting brackets 21 provided with screw holes 21a are suspended in these locking windows 20a. A mounting screw 19 is screwed into the screw hole 21 a and the shoulder contact member 20 is fixed to the substrate 17. The insertion rod 16 is provided with a front and rear storage hole 22 that opens forward. A plurality of (four in this embodiment) pin fitting holes 24 are provided in the long groove 23 formed in the insertion rod 16 at intervals in the front-rear direction. A second spring member 25 is interposed between the end surface of the insertion hole 16 of the insertion rod 16 inserted into the insertion hole 4 of the front stock body 2 and the end surface of the insertion hole 4 (partition wall 6). The insertion rod 16 (stockstock rear body 3) is moved backward. In the present embodiment, one of the spring members 25 is supported by the head 7 a of the mounting screw 7.

  The buttstock front body 2 is provided with operation means 26 for manually moving the engagement pin 11 along the pin hole 9. The operation means 26 is a lever member 28 that is pivotally supported by a shaft member 27 provided in the front part 2 of the stock. The lever member 28 protrudes upward on both the left and right sides so as to cover the protruding portion 8 and has a vertical cross section of a U-shape. One of the lever members 28 penetrates the shaft member 13 of the engagement pin 11. An engagement hole 29 that is a long hole is provided. By attaching the retaining member 30 to the shaft member 13 of the engaging pin 11 that passes through the engaging hole 29, the engaging pin 11 and the lever member 28 are engaged. Therefore, when the lever member 28 of the operation means 26 is operated to swing one of the lever members 28 downward (state shown in FIG. 3), the engagement pin 11 moves downward against the spring force. The joint body 12 moves from the insertion hole 4 into the pin hole 9. When the lever member 28 is operated to swing one of the lever members 28 upward (the state shown in FIG. 2), the engaging pin 11 moves upward by the spring force, so that the engaging member 12 of the engaging pin 11 is pinned. 9 is moved into the insertion hole 4. Further, when the lever member 28 is actuated to swing one side downward, as shown in FIG. 3, the distal end portion of the engaging portion body 12 of the engaging pin 11 is prevented from coming off from the long groove 23. The attachment position of the member 30 is adjusted. Further, even if the other of the lever member 28 comes into contact with a convex portion (not shown) on the ground or the like due to a gun dropping or the like, the spring force of the first spring member 14 is prevented so that one of the lever members 28 does not swing downward. Is decided.

Next, the operation of the telescopic gunstock 1 having the above configuration will be described. The telescopic gunstock 1 (hereinafter referred to as the gunstock) is configured such that the front part 2 of the base is fitted by a mounting screw 7 by fitting the fitting recess 5 at the front end of the front part 2 with the fitting part of the engine part (not shown). It is fixed to the engine part of the gun.
In order to change the length of the stock 1 from the state of FIG. 2, the person holding the gun operates with a hand different from the hand holding the gun with the shoulder body 15 of the rear stock 3 on his shoulder. The lever member 28 of the means 26 is actuated to swing one side downward, and the engaging pin 11 is moved downward against the spring force of the spring member 14. Then, the engagement state between the pin fitting hole 24 of the insertion rod 16 of the rear stock 3 and the engagement pin 11 is released, and the insertion rod 16 is moved rearward by the second spring member 25. In this way, the rear stock 3 can be moved in the front-rear direction with respect to the front stock 2 so that the person holding the gun moves the rear stock 3 forward so that the length of the stock 1 is suitable. (State of FIG. 3). In the present invention, since the rear stock 3 is moved rearward by the second spring member 25, it is only necessary to move the rear stock 3 forward, and the length of the stock 1 can be quickly changed. Further, the rear butt stock 3 is prevented from being detached from the front butt stock 2 due to the engagement between the long groove 23 provided in the insertion rod 16 and the engaging pin 11. Thereafter, when the appropriate length of the stock 1 is reached, the lever member 28 of the operating means 26 is operated by the above-described hand to swing one of the levers upward, and the engagement pin 11 is moved upward by the spring force to engage the engagement pin. 11 is engaged with the pin fitting hole 24 of the insertion rod 16, so that the insertion rod 16 is fixed to the buttock front body 2 with the insertion rod 16 being inserted into the fitting insertion hole 4 by a predetermined amount. be able to.

  Therefore, even if the impact due to the dropping of the gun or the like is repeated, the lever member engaged with the engagement pin 11 is not released without releasing the engagement state of the plurality of parts that operate the engagement pin 11 as in the prior art. The engagement pin 11 can be reliably moved by 28. Further, since the engaging pin 11 is moved along the pin hole 9 by the operation of the lever member 28, the engaging pin 11 is moved to the pin hole 9 even if the engaging portion between the lever member 28 and the engaging pin 11 is worn. Can be moved along. Further, since the engaging pin 11 fitted into the pin hole 9 provided in the front part 2 of the stock is engaged with the pin fitting hole 24 of the insertion rod 16, the screw is loosened as in the conventional case. Since the support rod does not move, the rear stock 3 can be reliably fixed to the front stock 2. Further, since the engaging pin 11 is fitted and inserted into the pin hole 9 provided in the front part 2 of the buttstock, the engaging pin 11 is not damaged as in the prior art. Can be changed.

It is a figure which shows the telescopic base of the gun of this invention. It is a longitudinal cross-sectional view of the telescopic base stock of FIG. It is a figure which shows the state which act | operated the lever member and moved the stock rear part body ahead. FIG. 4 is a IV view of FIG. 1.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Telescopic base stock 2 Base stock body 3 Back stock body 4 Insertion hole 9 Pin hole 11 Engagement pin 16 Insertion rod 22 Storage hole 24 Pin engagement hole 25 2nd spring member 26 Operation means 27 Shaft member 28 Lever member

Claims (3)

Provided with a front and rear fitting insertion hole that opens backward in the front part of the stock that can be attached to the engine part of the gun, and inserted into the fitting insertion hole movably in the front and rear direction. In a telescopic base of a gun designed to fix the insertion rod to the front of the stock with a predetermined amount of insertion rod inserted into the insertion hole, a plurality of pins are fitted to the insertion rod at intervals in the front-rear direction. A hole is provided, and an engagement pin that engages with the pin fitting hole is inserted into a pin hole provided in the front part of the stock, and the engagement pin is manually moved along the pin hole in the front part of the stock. A telescopic gunstock comprising a manipulation means, wherein an engagement pin is engaged with and disengaged from a pin fitting hole of an insertion rod which is inserted into the fitting insertion hole by a predetermined amount by operation of the manipulation means. The operating means is a lever member that is pivotally supported by a shaft member provided in the front of the buttstock, and engages one of the lever members with the engaging pin and swings one of the lever members to pin the engaging pin. 2. The telescopic base of a gun according to claim 1, wherein the gun base is moved along the axis. A storage hole in the front-rear direction that opens in front of the insertion rod is provided, and a spring member is interposed between the end face of the front end of the buttstock and the end face of the storage hole. The telescopic base of the gun according to claim 1 or 2, wherein the insertion rod released from is moved rearward.

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