JPH01285798A - Bullet shooting device for gas gun - Google Patents

Abstract

PURPOSE:To enable elimination of a moving part on the gun barrel side, to improve hit precision, and eliminate the supply of lubricating oil by providing a cylinder coupled to the rear of a chamber and a piston situated in a cylinder so that it can reciprocate and extruding a bullet against an O-ring at the outlet of a chamber by means of a differential pressure. CONSTITUTION:In a gas gun 1, a chamber 3 is coupled to the rear of a gun barrel 2, and when a magazine 5 is connected to a joint 4 below the chamber 3, an uppermost bullet 7 is fed in the chamber 3, and the bullet 7 is forced into pressure contact with the O-ring 10 through the force of a coil spring. When a trigger 24 is triggered off, air enters the chamber 3 through a cylinder 1 and an air passage of a piston 12, the piston 12 is moved forward, and the uppermost bullet 7 is shot against the drag of the O-ring 10. An air pressure is then decreased temporarily, the piston 12 is moved backward through the force of a return spring, and a subsequent bullet 7 is made to abut against the O-ring 10. As noted above, since the gun barrel side is not entirely provided with a moving part, the gun barrel is not moved, and hit precision is improved. Further, since the O-ring is secured in the chamber, there is no need for the normal feed of lubricating oil.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a bullet firing device for a gas gun that can fire a large number of bullets in rapid succession using compressed gas, such as air.

(Prior Art) Conventionally, gas guns that can fire bullets continuously while the trigger is pulled are Utility Model Publication No. 37-10895 and Special Publication No. 62-
No. 27358 is known.

The former gas gun has a bullet insertion port at the top, a piston tube, a piston, a valve, and return springs for each member inside, and air is introduced from behind the piston. Further, in the standby state, the forward movement of the piston cylinder and the piston is regulated by a latch that is interlocked with a trigger.

Therefore, when the trigger is pulled, the latch is released and the piston barrel moves forward to close the bullet insertion port, and then the valve is opened by the advance of the piston, and the introduced air causes the bullet in the barrel to be fired. As the air escapes at the same time as the bullet is fired,
The piston barrel and piston return due to the action of the spring, and the next bullet is supplied from the bullet insertion port, and the rear valve is closed.

Closing the valve increases the air pressure, and the piston barrel and piston move forward again to fire the next bullet, and the above-mentioned operation is repeated as long as the trigger is pulled.

On the other hand, the latter gas gun has a movable inner cylinder, an O-ring, and a spring for returning the inner cylinder inside the barrel, and also has a stepped part on the inside of the barrel, and the air passage connected to the rear can be opened and closed by a trigger. It is now possible to do so. Therefore, when the trigger is pulled, air is introduced from the rear and the forwardmost bullet, O-ring, and inner cylinder move forward, and when the O-ring reaches the step position, it expands and the bullet is fired. Also, since the air escapes at the same time as the bullet is fired, the inner cylinder and O-ring return due to the action of the return spring, and as a result, the next bullet is fitted into the O-ring, the air pressure rises again, and the above-mentioned operation is repeated.

(Problem to be Solved by the Invention) However, the gas gun of Utility Model Publication No. 37-10895 has the drawback that the piston inside the gun barrel constantly moves back and forth while firing a bullet, which causes the barrel to shake and reduce the accuracy. For this reason, the lower part of the gun barrel must be supported by a pedestal. Furthermore, the structure is extremely complex because it requires a large number of interlocking mechanisms, moving members, and various springs for firing bullets.

On the other hand, although the gas gun of Special Publication No. 62-27358 is quite simple in structure, the inner cylinder and O-ring inside the barrel constantly move back and forth, so the problem of accuracy still remains as mentioned above. has been done. Furthermore, in order to smoothly slide the O-ring along the inner surface of the gun barrel or the engine section, it is necessary to constantly or periodically replenish lubricating oil, and wear of the O-ring cannot be avoided.

The present invention was made in view of the above circumstances, and its purpose is to provide a bullet firing device for a gas gun that can improve the accuracy of bullets by eliminating moving parts on the barrel side, and does not require replenishment of lubricating oil. It is about providing.

(Means for Solving the Problems) In order to achieve the above object, the bullet firing device for a gas gun according to the present invention includes a bullet feeding means for sequentially feeding bullets into a chamber of a gas gun, and a bullet feeding means for feeding bullets into a chamber of a gas gun, and a leading bullet fixed in the chamber. a cylinder connected to the rear of the chamber; a piston that is reciprocally provided in the cylinder and pushes out the bullet in the chamber against the O-ring by means of differential pressure; A gas passage penetrating in the direction, a return spring for returning the advanced piston to its original position, a gas supply means for supplying gas into the cylinder, a valve installed in the gas passage, and a trigger for opening and closing the valve. It consists of

(Function) With these configurations, when a bullet supply means such as a magazine is first attached to the chamber, the leading bullet stops in contact with the O-ring.

When the trigger is pulled at this point, the gas passage is opened and gas is introduced into the rear cylinder, and this gas passes through the air passage of the piston and enters the chamber, forcing the leading bullet against the O-ring. In addition, since the pressure inside the cylinder, air passage, and chamber is uniform, the piston with a large rear area moves forward due to the differential pressure, first cuts the first bullet and the next bullet, and then cuts the first bullet into the O-ring. Fire against stopping force.

At the same time as the bullet is fired, the high-pressure gas in the cylinder is released through the gas passage of the piston and the gun barrel, so the piston retreats under the action of the return spring. The next bullet that was being held down now moves and makes contact with the OIJ song, and the above-mentioned operation is repeated as long as the trigger is pulled.

(Example) Fig. 1 shows a gas gun 1 incorporating the bullet firing device of the present invention.
FIG. 2 is an enlarged sectional view of the firing mechanism portion.

In this gas gun 1, a chamber 3 is connected to the rear of an elongated gun barrel 2, and a magazine 5 as a magazine is attached to a joint 4 that projects below the chamber 3. Magazine 5 is
There is an elongated magazine tube 6 inside, and a large number of bullets 7 are filled in the magazine tube 6. Each bullet 7 is urged upward to the exit side by a coil spring 8 in the lower end of the tube, and when the magazine is attached, its ejection is prevented by a magazine seal 9, and when the magazine 5 is connected to the joint 4, the magazine Seal 9 opens and bullet 7 enters chamber 3
supplied within.

As can be seen from FIG. 2, an O-ring 10 is fixed to the boundary between the barrel 2 and the chamber 3, and this O-ring 10 has an inner diameter slightly smaller than the bullet 7.

A cylinder 11 is connected to the rear end of the chamber 3, and a piston 12 is installed inside the cylinder 11 so as to be able to reciprocate. The piston 12 is disposed such that its elongated front end 12a can enter the hole in the chamber 3 and push out the leading bullet 7, and is normally urged backward by a return spring 13. Furthermore, the spaces between the piston 12 and the cylinder 11 and between the elongated tip 12a and the rear end of the chamber are sealed with O-rings 14 and 15, respectively. Furthermore, an air passage 16 is formed in the piston 12 and passes through the piston 12 in the axial direction.

A plurality of air vent holes 17 are provided on the side surface of the cylinder 11, and a joint 18 is connected to the lower rear end. Fitting 1
8 is connected to an air tube 19 through which air flows,
The air tube 19 passes through the gas gun handle 21 via a valve 20 and is connected to an external compressor (not shown).

The valve 20 opens and closes an air passage, and is provided with a valve seat 21, a valve body 22, and a coil spring 23 inside. Normally, the valve body 22 is pressed against the valve seat 21 by the pressing force of the coil spring 23, and the air is released. It's blocking the passage. A tip 22a of the valve body 22 protrudes outward, and the rear end of the trigger 24 abuts this protruding end. The trigger 24 is rotatable about a support shaft 25 and is regulated by a stopper 26 to the position shown in FIG. 1. When the trigger 24 is pulled, the valve body 22 is pushed and the air passage is opened.

The bullet firing device of this embodiment configured as described above operates in the following order.

First, the bullet 7 in the magazine 5 is pressed by the coil spring 8, and the tip of the bullet 7 in the chamber 3 is pressed against the O-ring 10 to prevent it from flying out. Also, since the valve 20 is closed, the high pressure air from the compressor is supplied to the valve 2.
It stops upstream of 0 (inside the grip 21).

When the trigger 24 is pulled here, the valve body 22 is pushed and the valve seat 21
As the air separates from the air tube 19 and the fitting 18
The gas flows into the cylinder 11 through the piston 1.
Since the bullet 7 enters the chamber 3 through the air passage 16 of No. 2, the leading bullet 7 is pressed against the O-ring 10. Also, since the pressure inside the cylinder 11, air passage 16, and chamber 3 is uniform, the piston 12, which has a large rear area, moves forward due to the differential pressure (Fig. 3), cutting the leading bullet 7 and the next bullet 7. After that, the leading bullet 7 passes through the O-ring 10 and is fired, as shown in FIG.

Since the air in the left side space of the cylinder 11 flows out from the air vent hole 17 when the piston 12 moves forward, the piston 12 can move quickly and the brake will not be applied.

Next, when the bullet 7 is fired, the high-pressure air in the cylinder 11 also flows out from the air passage 16 of the piston 12 and the gun barrel 2, so the air pressure temporarily decreases, and the piston 12 moves as shown in FIG. It retreats with the force of the return spring. As the next bullet 7 which was being held down is now released, it rises and comes into contact with the O-ring 10, returning to the state shown in FIG. 2.

The operations shown in FIGS. 2 to 5 are repeated in a short period of time while the trigger 24 is being pulled, thereby causing the bullets 7 to be fired continuously. When the finger is released from the trigger 24, the valve body 22 is pressed against the valve seat by the biasing force of the coil spring 23, and the air passage is cut off, so that firing of the bullet is stopped.

Note that it is possible to adopt other mechanisms for the magazine 5 for supplying bullets, the valve 20 for air opening/closing, and the trigger 24 shown in the above embodiment, and the piston 12 may be actuated by gas other than air. Good too.

Furthermore, if the magazine tube 6 is used not only for bullet feeding but also as an air supply passage, the bullet 7 can be moved by air, and the air enters the cylinder through the air passage of the piston, and the piston is moved by differential pressure as in the above embodiment. moves forward, so the coil spring 8 and air tube 19 for feeding the bullet can be omitted.

(Effects of the Invention) As detailed above, in the bullet firing device for a gas gun according to the present invention, since there is no movable part on the gun barrel side, the accuracy of the bullet can be improved without supporting the gun barrel with a pedestal or the like. I can do it. Furthermore, since the O-ring that temporarily stops the bullet is fixed within the chamber, there is no need to constantly replenish lubricating oil as in the conventional case.

[Brief explanation of the drawing]

′! Figure J1 is a longitudinal sectional view of a gas gun incorporating the bullet firing device of the present invention, and Figures 2 to 5 are enlarged sectional views showing the bullet firing operation. 1... Gas gun, 2... Barrel, 3... Chamber, 5
...Magazine, 7...Bullet, 10...0 ring,
11...Cylinder, 12...Piston, 13...
Return spring, 16...Air passage, 19...Air tube, 20...Valve, 24...Trigger.

Claims (1)

[Claims] A bullet supply means that sequentially feeds the bullets into the chamber of the gas gun, an O-ring that is fixed in the chamber and temporarily stops the leading bullet, and a cylinder connected to the rear of the chamber.
A piston is provided in the cylinder so as to be able to reciprocate and pushes out the bullet in the chamber against the O-ring by means of a pressure difference, a gas passage passes through the piston in the axial direction, and the piston is returned to its original position after being moved forward. A bullet firing device for a gas gun, comprising a return spring, a gas supply means for supplying gas into the cylinder, a valve installed in a gas passage, and a trigger for opening and closing the valve.