JPS6170399A - Automatic charging type gun - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a self-loading gun that automatically loads bullets in a magazine into a chamber by utilizing firing gas pressure.

[Conventional technology]

The most produced caliber 12 gauge bullet has a weight of 1
They range from ounces to 2 ounces, and the amount of gunpowder varies from 1 to 1.6 times depending on the weight.

When the amount of gunpowder increases by 1.6 times, the energy generated increases approximately in proportion to the third power of the weight of the gunpowder.

For this reason, in recent years, automatic loading shotguns, which use shot gas pressure to automatically load the bullets in the magazine into the chamber, have been developed to In order to eliminate the hassle of having to change guns at the same time, various self-loading guns have been proposed that can be fired with a single gun regardless of the strength of the loaded bullet.

For example, it has been proposed that a part of the gun barrel be modified to include a device that switches the strength of the shot gas pressure taken in, but this requires switching the device each time it is used.
This was inconvenient in a sudden situation, and there was a risk of making a mistake.

Therefore, it was proposed to have an exhaust valve that opens and closes depending on the propellant gas pressure. According to this, when a weak bullet is fired, the exhaust valve is closed and the empty cartridge is ejected from the chamber by moving the piston etc. using the firing gas pressure as it is, and at the same time, the empty cartridge is discharged from the magazine. When the bullet to be fired is taken out and a strong bullet is fired, the discharge valve body is opened with the firing gas pressure to release the excess firing gas pressure to the outside, and the firing gas pressure necessary for loading the bullet is used as described above. Use for operation.

However, during repeated use, combustion particles adhere to the valve body, etc., reducing the responsiveness to the firing gas pressure, and even when a strong bullet is fired, the valve body remains closed, causing the firing gas pressure to remain on the piston. There is a problem that the valve body remains open and the firing gas pressure does not act sufficiently on the piston, etc., and the functions of the members, mechanisms, etc. that are interlocked with the piston are impaired. There was a problem that the mechanism could not be operated.

[Problem that the invention seeks to solve]

The present invention was made in view of the above circumstances, and its purpose is to be able to fire with a single gun regardless of the strength of the loaded bullet, and to be able to fire the gun repeatedly without causing any problems. To provide a self-loading gun.

[Means for solving problems]

In order to achieve the above object, the present invention provides an automatic loading system in which a gas boat is provided at an appropriate position in a gun barrel, and a piston or the like is moved by the firing gas pressure taken in from the gas boat to automatically load bullets in a magazine into a chamber. In a type gun, an inertia valve that is movable in the axial direction of the gun barrel and opens a valve opening of an exhaust valve that releases the projectile gas pressure to the outside when the magnitude of recoil acting on the gun at the start of combustion of the propellant exceeds a predetermined value. The exhaust valve is characterized by being equipped with a body and a spring member that biases the inertial valve body in a direction to close the valve port of the exhaust valve.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

1 and 2 show an example of a self-loading gun of the present invention. In the figure, reference numeral 1 is a gun barrel, 2 is a receiver 13, and a gun stock.

On the barrel 1, there is a ring 4 brazed at an appropriate position on the barrel 1.
The piston 6 is moved toward the receiver 2 by the pressure of the firing gas flowing in from the gas boat 5, the action par 7 is moved in the same direction by the piston 6, and the chamber 8 is formed by a member interlocked with the action par 7. A magazine tube 10 etc. loaded with a plurality of bullets 9 (three in the drawing) to be sent to the machine is equipped. These piston 6, action par 7, magazine tube 10, etc. are covered by a forearm 11 that is detachably attached to the gun barrel 1.

The receiver 2 includes a trigger 12, a trigger lever 13 that is rotated by the trigger 12, and a trigger lever 13 that is unlatched and rotated by the elastic force of a hammer spring 14. A hammer 16 that strikes a moving firing pin 15 and a magazine tube 10
A charge 9 is drawn from the cartridge and sent to the chamber 8 by the bolt.
It is equipped with a carrier 17 etc. that can hold the aircraft.

When the trigger 12 is pulled, the trigger lever 13 rotates, the latch is released, and the hammer 16 strikes the firing pin 15 under the repulsive force of the hammer spring 14. Then, the firing pin 15 moves forward and strikes the detonator of the bullet 9, causing the gunpowder to burn and a shot to be fired.

When the shot exceeds the position of the gas boat 5, the piston 6 is moved by the pressure of the firing gas flowing in from the gas boat 5, which causes the action par 7 to move to the receiver 2.
moved to the side. The movement of the actioner 7 disengages the slide block 18 from the gun barrel 1, causing the slide block 18 to move backward, causing the empty cartridge case in the chamber 8 to fly out, and at the same time, the shell latch operates to close the magazine tube 1.
The next bullet 9 is pulled out from the cartridge 0, and the carrier 17 holds it and pushes it into the chamber 8 with a bolt.

The above configuration is the same as the conventional one. Next, the features of the present invention will be explained.

The following reactions occur in the reading body A when the bullet 9 is fired.

a. The recoil that occurs when the trigger 12 is pulled and the propellant starts burning.

b. Recoil when shot and high-velocity gas exit the muzzle.

C1 The reaction that occurs when the weight (rear seat body) supported by the springs for the automatic loading function collides with the reading body A during its final stroke.

These recoils occur in the order of a, b, and c, but because they occur within an extremely short period of time, the shooter feels them as one recoil. a
The recoil occurs depending on the strength of the bullet 9, and in the present invention, this recoil is utilized to open the valve port of the discharge valve 19 for the propellant gas.

FIG. 2 shows the features of the present invention in detail, and the end of the magazine tube 10 is provided with a piston guide section (hereinafter abbreviated as guide section) 20 that extends toward the muzzle side (left side in FIG. 2). .

This guide part 20 has a hollow shape, and the forearm 1
One end protruding from the end face of the ring 4 is open, and a hole 22 serving as a valve opening of the exhaust valve 19 is formed on the circumferential surface of a portion located within a cylinder portion 21 provided integrally with the ring 4 .

An inertial valve body 23, which serves as a valve body of the exhaust valve 19, is fitted into the hollow portion 20a of the guide portion 20 so as to be movable in the axial direction. (
A coil spring 24 is provided to bias the coil spring 24 (on the right side in FIG. 2).

The inertial valve body 23 is made of a material having a high specific gravity, such as brass, and is provided with a gas leak hole 23a that penetrates in the axial direction at its center.

Further, the coil spring 24 has a spring constant k of 0, for example.
．． It is set to be very small, about 00573 kg/m-.

These inertial valve body 23 and coil spring 24 act as a kind of acceleration sensor. That is, when a weak charge 9 is fired, the recoil at the start of combustion of the propellant is small and only a weak and slow acceleration is applied to the reading body A, so the inertial valve body 23 remains supported by the coil spring 24. It will move together with the reading body, and the hole 22
remains closed by the inertial valve body 23. but,
When a strong charge 9 is fired, the recoil at the start of combustion of the propellant is large and a large acceleration is generated in the reader body A, so the reader body A is rapidly displaced, but the inertial valve body 23 remains stationary due to its weight. The coil spring 24 is compressed until the hole 22 is opened.

As a result, excess pressure above the firing gas pressure required for automatic loading operation is removed from the hole 22, the hollow part 20a, and the gas leak hole 23.
a, Opening 2 on the other end side (left side in Figure 2) of the hollow part 20a
0b, escapes to the outside through the hole 25a of the forearm cap 25.

〔Effect of the invention〕

As explained above, according to the present invention, when the magnitude of the recoil acting on the reading body at the start of combustion of the propellant exceeds a predetermined value, the exhaust valve is opened to generate extra pressure above the pressure necessary for automatic loading operation. Since the valve is designed to escape to the outside, the valve operation is more stable compared to conventional valves that open and close in response to the propellant gas, and the valve opening remains open or closed even after repeated use. No such problems will occur.

In addition, since it is composed of a combination of an inertial valve body and a spring member, the mechanism is extremely simple and reliable, and does not increase costs.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG.
The figure is an enlarged sectional view of the main part. A...reader body, 1...barrel, 2...receiver-1
5... Gas boat, 6... Piston, 7... Action bar, 8... Chamber, 9... Loading, 10...
Magazine tube, 19...exhaust valve, 22...hole,
23... Inertial valve body, 24... Spring member (coil spring).

Claims (1)

[Claims] A self-loading gun in which a gas boat is provided at an appropriate position on the gun barrel, and a piston, etc. is moved by the firing gas pressure taken from the gas boat to automatically load the bullets in the magazine into the chamber, and the gun moves in the axial direction of the gun barrel. an inertial valve body that opens the valve opening of the exhaust valve to release the propellant gas pressure to the outside when the recoil acting on the gun at the start of combustion of the propellant exceeds a predetermined value, and the inertial valve body is connected to the exhaust valve. An automatic loading gun characterized by being equipped with a spring member that biases the valve port in a direction to close it.