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1. 发明专利

JPH0894292A TRIGGER MECHANISM FOR MACHINE GUN 失效
公开(公告)号：JPH0894292A
公开(公告)日：1996-04-12
申请号：JP26603794
申请日：1994-09-22
申请人： JAPAN STEEL WORKS LTD
发明人： YOSHIMATSU MORIYOSHI
IPC分类号： F41A9/00 , F41A7/02 , F41A7/10 , F41A17/00 , F41A19/59
摘要： PURPOSE: To stabilize a shooting stopping-operation by preventing a malfunction of a bullet feed stopper. CONSTITUTION: A trigger mechanism 9 has the bullet feed stopper 12 of a trigger 10 so that it may freely get in or out at an ammunition passage 7 between a pullet feeder 4 and a trigger driver 11 having a feed wheel 6, and an operating lever 16, an operating shaft 18, a lock lever 19, a lock block 20, a releasing shaft 22, etc., is coupled to be driven at the stopper 12. At the time of stopping shooting, the stopper 12 is disposed at the stopping position as shown to prevent the passage of an ammunition W and to stop the feeding to the wheel 6, and hence even if the wheel 6 is operated, the ammunition W is not fed to a bolt 5, and not shot. In this case, the driver 11 is in a non-operating state, and the block 20 is prevented from being rotated forward of the lever 19. Thus, the stopper 12 is prevented from being floated due to vibration, impact, etc., by the lever 16 integral with the lever 19, and held at the stopping position.

2. 发明专利

JPH07139895A AMMUNITION SUPPLYING AND DISCHARGING DEVICE FOR MACHINE GUN 失效
公开(公告)号：JPH07139895A
公开(公告)日：1995-06-02
申请号：JP30966493
申请日：1993-11-17
申请人： JAPAN STEEL WORKS LTD
发明人： YOSHIMATSU MORIYOSHI
IPC分类号： F41A7/10 , F41A9/01 , F41A9/14 , F41A9/51 , F41A15/16
摘要： PURPOSE:To provide an ammunition-supplying and discharging device for a machine gun which has a switching mechanism of a guide member having a simple structure and can be applied to the gun of a high shooting speed. CONSTITUTION:Guide members 18, 26 which can be disposed at an ammunition guiding position A for partitioning ammunition feeding bent passages 2e, 2f for guiding ammunitions 4R, 4L to be fed by an ammunition feeding wheel 6 and a cartridge case discharging position B for opening cartridge case discharge passages 2c, 2d to discharge cartridge cases 4c are oscillatorily provided at base ends of the passages 2c, 2d. An elastic element for elastically energizing the members 18, 26 to a neutral position C of intermediate of the positions A and B is provided, a switching cam 19c operated to dispose the one member 18 or 26 at the position A and the other member 26 or 18 at the position B is formed at a cam drum 19 in a predetermined length in a circumferential direction corresponding to the rotary angle of the drum 19 when at least the ammunitions 4R, 4L is intermittently supplied.

3. 发明专利

JP2001263991A SAFETY MECHANISM FOR EXTERNAL DRIVE TYPE MACHINE GUN 失效
公开(公告)号：JP2001263991A
公开(公告)日：2001-09-26
申请号：JP2000072660
申请日：2000-03-15
申请人： JAPAN STEEL WORKS LTD
发明人： YOSHIMATSU MORIYOSHI
IPC分类号： F41A7/06 , F41A7/10 , F41A9/51 , F41A17/18
摘要： PROBLEM TO BE SOLVED: To ensure safety by a method wherein a delay-action ammunition during the occurrence of a delay start phenomenon is positioned in a chain plug by controlling a motor for an external drive part. SOLUTION: A safety mechanism for an external drive type machine gun is formed such that a motor (12) is controlled by a first signal (31a) to indicate a momentary time in a closing period in which a chain plug (6) is closed and a second signal (35a) and/or a third signal (40a) to show that a bullet is fired, and a delay-action ammunition is positioned in a chain plug.

4. 发明专利

JP2901871B2 失效
公开(公告)号：JP2901871B2
公开(公告)日：1999-06-07
申请号：JP10168194
申请日：1994-04-18
申请人： NIPPON SEIKOSHO KK
发明人： YOSHIMATSU MORYOSHI
IPC分类号： F41A3/68 , F41A7/02 , F41A7/10 , F41A17/18 , F41A17/42

5. 发明专利

JPH09287891A CAM DRUM STRUCTURE OF MACHINE GUN 失效
公开(公告)号：JPH09287891A
公开(公告)日：1997-11-04
申请号：JP12785496
申请日：1996-04-24
申请人： JAPAN STEEL WORKS LTD
发明人： YOSHIMATSU MORIYOSHI
IPC分类号： F41A7/10
摘要： PROBLEM TO BE SOLVED: To solve various malfunctions of a machine gun, wherein the malfunctions are such that a rise time is prolonged when a motor torque is made small since the moment of inertia of a cam drum is constant, a fluctuation of the rotating speed of a cam drum is caused by a fluctuation of a force necessary for driving a bolt so that a closing time tends to become short, and the fluctuation of the rotation of the cam drum becomes a cause of generation of vibrations. SOLUTION: A plurality of weight members 11 which have a given mass respectively are disposed and arranged radially in a cam drum 9, while the radial movement of these might members 11 are guided by guide portions 9c. A plurality of elastic members 10 are provided in a cam drum 9 for radially and inwardly biasing the night members 11, wherein the biasing force of each elastic member 10 is set such that the elastic member 10 is elastically urged by the weight member 11 which receives a centrifugal force before the rotating speed of the cam drum 9 reaches a speed which provides at least a maximum shooting speed of the machine gun.

6. 发明专利

JP2630736B2 失效
公开(公告)号：JP2630736B2
公开(公告)日：1997-07-16
申请号：JP35306393
申请日：1993-12-16
申请人： NIPPON SEIKOSHO KK
发明人： YOSHIMATSU MORYOSHI
IPC分类号： F41A3/12 , F41A7/10 , F41A17/32

7. 发明专利

JP2567576B2 失效
公开(公告)号：JP2567576B2
公开(公告)日：1996-12-25
申请号：JP12916294
申请日：1994-06-10
申请人： BOEICHO GIJUTSU KENKYU HONBUCHO , NIPPON SEIKOSHO KK
发明人： KONO MINORU , ISHIGURO HISAYUKI , YOSHIMATSU MORYOSHI
IPC分类号： F16H35/02 , F41A7/10

8. 发明专利

JPH081358B2 失效
公开(公告)号：JPH081358B2
公开(公告)日：1996-01-10
申请号：JP32576493
申请日：1993-12-01
IPC分类号： F41A7/10 , F41A19/12 , F41A19/13 , F41A19/43

9. 发明专利

JPH07174488A BOLT PART DRIVING MECHANISM 失效
公开(公告)号：JPH07174488A
公开(公告)日：1995-07-14
申请号：JP35306493
申请日：1993-12-16
申请人： JAPAN STEEL WORKS LTD
发明人： YOSHIMATSU MORIYOSHI
IPC分类号： F41A3/12 , F41A7/02 , F41A7/10
摘要： PURPOSE:To perform a smooth and efficient driving of a bolt for a long period of time without making any complex shape of a cam groove. CONSTITUTION:A cam drum 8 is constructed such that many cam grooves 10 are formed, and a bolt part 4 is driven to be reciprocated with one cycle of advancing, stopping, retracting and stopping under its two-rotations. A cam follower 11 is provided with a yoke-shaped supporting shaft 17 having a pair of yokes 20. The yoke-shaped supporting shaft 17 is rotatably arranged and each of the yokes 20 is engaged with the cam grooves 10 through a rotating bearing 1..8 while being rotated and contacted with them. As the cam drum 8 is rotated, each of the yokes 20 is moved while being rotatably contacted with the cam grooves 10 through the rotating bearing 18, its forward or rearward movement is transmitted to the bolt part 4 through the yoke-shaped supporting shaft 17 so as to reciprocate the bolt 4. Since the cam follower 11 and the cam grooves 10 are rotatably contacted from each other, abrasion of respective member is less, the bolt part 4 is driven stably, smoothly and efficiently for a long period of time and so a location where an inclining angle of the cam grooves 10 is not necessary to be widened.

10. 发明专利

JPH07174487A METHOD AND DEVICE FOR CLOSING MACHINE GUN 失效
公开(公告)号：JPH07174487A
公开(公告)日：1995-07-14
申请号：JP34455193
申请日：1993-12-20
申请人： JAPAN STEEL WORKS LTD
发明人： YOSHIMATSU MORIYOSHI , WATANABE HIDEYUKI
IPC分类号： F41A3/12 , F41A7/02 , F41A7/10
摘要： PURPOSE:To provide a method and a device for closing a machine gun in which a bolt part can be made small in size, its weight can be light and concurrently a driving force for a cam drum for driving the bolt part is also reduced. CONSTITUTION:In the case that a bolt part is changed from an advancing stage to an advancing stopping stage as a cam drum 10 is rotated, a lock ring 3 is rotated by a first projection cam 10c by a desired angle alpha, a lock member 18 is pushed inwardly by a pressing cam 3b, the lock member 18 is engaged with an engaging concave part 11b of an ammunition 11 so as to keep the barred 1 in its closed state. Further, when the bolt part is changed from the advancing stopping stage to a retracting stage, the lock ring 3 is rotated by a second projection cam 10c' by the desired angle alpha, the engaged state between the pushing cam 3b and the lock member 18 is released, the lock member 18 is returned in an outward direction and the engaged state between the lock member 18 and the engaging concave part 11b is released.

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