TWI601936B - Gas gun - Google Patents

Description

Gas gun

The present invention relates to a gas gun having a release valve using carbon dioxide as a power source.

Gas guns that used compressed gas as a source of power for toy guns are known. The gas gun knocks the rear end of the release valve with an iron striker or a striker to thereby open the gas passage to release the compressed gas. This compressed gas is then fired by a shotgun that is on standby in the shot.

However, hydrochlorofluorocarbons, which have been used as power sources for gas guns, are known to have a greenhouse effect of hundreds of times to more than 10,000 times of carbon dioxide (CO2). As a result, emissions reductions for hydrochlorofluorocarbons have been promoted in recent years. Therefore, in response to such a situation, a gas gun using a carbon dioxide cylinder filled with liquid carbon dioxide is being developed.

However, since carbon dioxide has a gas pressure several times that of hydrochlorofluorocarbon, it is necessary to improve the structure of the gas gun in order to be suitable for this gas pressure.

Then, an air toy gun disclosed in Patent Document 1 of a conventional gas cylinder using a hydrochlorofluorocarbon is used. This air toy gun has a gun body The grip portion is provided with a magazine structure. The gas accumulator chamber of the magazine is filled with a compressed gas such as a chlorofluorocarbon gas. In addition, the release valve provided at the upper portion of the magazine can be tapped with a hammer to thereby open the closing gas passage.

In the case where a carbon dioxide cylinder is used for the magazine, the release valve shown in Fig. 4 (a) and (b) is reviewed. The structure shown in Fig. 4(a) is a valve structure provided in the upper portion of the magazine shown in Patent Document 1, that is, a structure provided on the upper portion of the gas accumulating chamber of the magazine.

As shown in Fig. 4(a), the valve seat member 51 is fixed to the gas passage 50 of the magazine. Further, the air hole 52 of the valve seat member 51 is inserted through the discharge valve 53. Further, an annular groove 55 is formed in the head portion 54 of the release valve 53, and a rubber O-ring 56 is attached to the annular groove 55.

On the other hand, the rod portion 58 of the discharge valve 53 is inserted into the inside of the valve sleeve 57 provided at the upper portion of the magazine. The release valve 53 is always pushed rearward (to the right of Fig. 4(a)) by a valve spring 59 provided inside the valve sleeve 57. Further, a reduced diameter portion 60 is formed between the stem portion 58 of the relief valve 53 and the head portion 54.

Further, the valve seat member 51 and the valve sleeve 57 are in communication with a gas passage 50 that communicates with the barrel of the projectile before the launch. As shown in Fig. 4(a), the release valve 53 is normally pushed rearward by the elastic force of the valve spring 59. Therefore, the O-ring 56 provided in the head portion 54 of the discharge valve 53 is in close contact with the valve seat member 51, and the air hole 52 is closed.

In such a configuration, the compressed gas filled in the gas accumulating chamber of the magazine is in a state in which the O-ring 56 of the head portion 54 of the discharge valve 53 is pressed in the direction of the valve seat member 51.

Therefore, by depressing the trigger to rotate the striking iron and knocking the rear end of the release valve 53, as shown in Fig. 4(b), the release valve 53 and the spring force of the valve spring 59 are opposed to each other (the first 4 (b) to the left) move. At this time, when the valve seat member 51 and the O-ring 56 are opened, a gas flow is generated in the air holes 52, and the O-ring 56 is attracted by the gas flow.

Further, in the case of the gas pressure of the conventional chlorofluorocarbon gas, even when a gas flow is generated between the valve seat member 51 and the O-ring 56 as described above, the O-ring 56 is kept fitted in the release. The state of the annular groove 55 of the valve 53.

However, in the case where a carbon dioxide cylinder is used as a power source, since the gas pressure of carbon dioxide is much stronger than that of the chlorofluorocarbon gas, the O-ring 56 is detached from the annular groove 55 of the discharge valve 53 and sucked toward the reduced diameter portion 60. The direction is stuck and the air hole 52 is squashed. Therefore, the air hole 52 of the valve seat member 51 is closed, and the flow rate of the gas necessary for the gas passage 50 cannot be supplied.

[Previous Technical Literature]

[Patent Document 1] Japanese Utility New Case Registration No. 3051479

The present invention has been made in view of the above circumstances, and its object is to provide a gas gun which is designed to be suitable for carbon dioxide pressure in the case where carbon dioxide is used as a power source of a gas gun.

In order to solve the above problems, the gas gun of the first aspect of the present invention is provided with a gas passage between the supply source of the compressed gas and the barrel of the projectile before the launch, and the release valve is inserted through The air hole of the valve seat member disposed on the way of the gas passage moves the release valve in the axial direction to open and close the air hole of the valve seat member, wherein the release valve system comprises: the seat seated on the valve seat member And a rod portion that slides through the through hole of the valve sleeve; the valve sleeve is disposed to be separated from the valve seat member in the axial direction; and the stem portion of the release valve includes: a neck portion that slides in the air hole of the valve seat member, The reduced diameter portion provided between the neck portion and the crotch portion of the stem portion and the reduced diameter portion of the stem portion are smaller than the outer diameter of the neck portion and the crotch portion of the stem portion. An outer diameter, and an O-ring provided on the annular groove formed at the head of the release valve is adhered to the seat portion of the valve seat member by the elastic force of the valve spring provided in the inner cavity of the valve sleeve Closing the gas passage, on the other hand, hitting the rear end of the release valve with a hammer or a striker When the valve is moved in the direction of the valve seat member, when the annular convex portion formed between the annular groove and the neck portion of the release valve is fitted into the step formed between the seat portion of the valve seat member and the air hole During the peripheral portion, the gas passage is closed, and when the reduced diameter portion of the release valve moves in the inner circumference of the air hole of the valve sleeve, the inner circumference of the air hole through the valve sleeve and the reduced diameter portion of the release valve are generated. The gap allows the compressed gas to circulate through the gas passage.

In addition, the gas gun of the second aspect of the patent application of the present invention is the first item of the patent application scope, wherein the grip of the gun body or the magazine filled in the grip of the grip is provided in the cylinder chamber, and the cylinder is housed indoors. Carbon dioxide cylinder filled with carbon dioxide.

In addition, the gas gun of the third aspect of the invention is as claimed in claim 1, wherein the grip of the gun body or the magazine of the impeller chamber of the grip is provided with a gas accumulating chamber. And injecting carbon dioxide into the gas accumulator chamber.

Further, the gas gun of the fourth aspect of the present invention is the object of claim 1, wherein the outer diameter of the reduced diameter portion formed by the stem portion of the release valve is adjusted. The flow rate of the compressed gas is adjusted, and the compressed gas system flows through a gap generated between the inner circumference of the pore of the valve sleeve and the reduced diameter portion of the discharge valve.

In addition, the gas gun of the fifth aspect of the invention is provided with a gas passage between the supply source of the compressed gas and the barrel of the projectile before the launch, and the release valve is inserted through the gas passage. The air hole of the valve sleeve disposed on the way moves the release valve in the axial direction to open and close the air hole of the valve sleeve, and is characterized in that a lubricating synthetic resin is installed at the front end portion of the air hole of the valve sleeve a valve ring, and a rod portion of the release valve is inserted through the air hole of the valve ring, and a valve head provided at a head portion of the rod portion has a tapered reduced diameter surface, and the reduced diameter surface is seated Closing the air hole of the valve sleeve at the seat of the air hole of the valve ring, and on the other hand, tapping the rear end of the release valve by striking iron or a striker to make the reduced diameter surface of the release valve from the seat of the valve ring Release the air hole that opens the valve sleeve.

Further, the gas gun of claim 6 of the present invention is the fifth aspect of the patent application, wherein the synthetic resin for forming the valve ring is polyacetal.

Moreover, the gas gun of the seventh aspect of the patent application of the present invention is as Patent Application No. 5 or Patent Application No. 6, wherein one end of the valve spring is inserted into a convex portion protruding toward the head side of the release valve, and the other end of the valve spring abuts against the wall surface of the gas passage Support.

According to the structure of the first aspect of the invention, the rear end of the striker valve of the gun body is struck by the striker or the striker, and the release valve is moved in the direction of the valve seat member. At this time, in the initial stage of the movement of the release valve, the annular convex portion formed between the annular groove of the relief valve and the neck portion is held in a state of being fitted into the inner peripheral portion of the step of the valve seat member. During this period, the pores are in a closed state, so that the pores do not generate a gas flow, and the gas flow of the compressed gas does not act on the O-ring of the head of the discharge valve.

Next, when the reduced diameter portion of the relief valve moves to the inner circumference of the pore of the valve sleeve, the compressed gas flows through the gap between the outer circumference of the reduced diameter portion and the pore. This gas flow does not have a gas pressure that deforms the O-ring fitted to the fitting recess of the head of the discharge valve. Therefore, the O-ring is kept in a state of being fitted into the annular groove of the discharge valve. Therefore, the air hole is not closed by the O-ring as in the past, and the fixed gas pressure can be supplied to the projectile that is waiting for the shot.

Further, in the above configuration, the flow amount of the compressed gas can be adjusted by adjusting the outer diameter of the reduced diameter portion formed by the stem portion of the release valve, and the compressed gas system flows through the outer circumference of the reduced diameter portion and the seat. The gap between the pores of the member. Therefore, it is possible to appropriately adjust the pressure of carbon dioxide which is much stronger than the conventional chlorofluorocarbon gas. In this way, the power of the launched projectile is not dangerous and can be used as a safe gas gun.

Further, in the second aspect of the patent application of the present invention, the structure is such that a lubricated synthetic resin valve ring is attached to the front end portion of the air hole of the valve sleeve, and a cone formed by the valve head of the release valve is provided. The reduced diameter surface is seated on the seat of the valve ring. Thereby, the quick response of the release valve is excellent, and the gas flowability through the pores of the valve ring is improved, and the projectile can be efficiently emitted with a small amount of gas.

Further, when the reduced diameter surface of the valve is pressed against the corner of the seat portion of the valve ring as described above, since the valve ring is formed of synthetic resin, the corner portion of the seat portion is fitted to the reduced diameter surface of the release valve. The flattening and the adhesion to the seat of the valve ring are improved, which is beneficial to the improvement of the sealing property.

In addition, by inserting one end of the valve spring into the convex portion protruding toward the head side of the discharge valve, the other end of the valve spring abuts against the wall surface of the gas passage of the gas gun to be supported, and is inserted into The stem of the release valve in the air hole of the valve spring is less likely to cause a problem when moving. In addition, the valve spring can also be formed into a large diameter to increase the rigidity, and can improve the adhesion of the release valve when seated on the seat portion of the valve ring.

B‧‧‧projectile

G‧‧‧ gap

1‧‧‧ gun body

2‧‧‧ grip

3‧‧‧The bomb room

4‧‧‧ magazine

4a‧‧‧Mounting holes

4b‧‧ Thread groove

5‧‧‧ guns

6‧‧‧ 弹 cavity

7‧‧‧Upper spring

8‧‧‧ gas passage

9‧‧‧Upper plate

10‧‧‧CO2 cylinder

10a‧‧‧ openings

11‧‧‧Cylinder room

12‧‧‧Thread groove

13‧‧‧ 盖部

14‧‧‧ valve seat components

14a‧‧‧parts

15‧‧‧ stomata

16‧‧‧release valve

17‧‧‧Inside barrel

18‧‧‧ head

19‧‧‧ valve sleeve

19a‧‧ Thread groove

20‧‧‧through holes

21‧‧‧ pole

22‧‧‧ annular recess

23‧‧‧ hit iron

24‧‧‧Scill

25‧‧‧Shot iron

26‧‧‧ board machine

27‧‧‧Toggle lever

28‧‧‧ neck

29‧‧‧ Inside cavity

30‧‧‧胴

31‧‧‧Reducing section

32‧‧‧Valve spring

33‧‧‧stop ring

34‧‧‧ annular groove

35‧‧‧O-ring

36‧‧‧ annular convex

37‧‧‧

38‧‧‧ front end ring

39‧‧‧release valve

39a‧‧‧ pole

39b‧‧‧ valve head

39c‧‧‧Reducing surface

39d‧‧‧ protrusion

39e‧‧‧ annular groove

40‧‧‧ valve sleeve

40a‧‧‧ annular recess on the front end

40b‧‧‧ annular recess on the rear side

40c‧‧‧Expanded hole

41‧‧‧ stomata

41a‧‧‧ gas through hole

42‧‧‧胴

43‧‧‧Thread groove

44‧‧‧O-ring

45‧‧‧Valve ring

45a‧‧‧Flange

45b‧‧‧ Tube

46‧‧‧

47‧‧‧Valve spring

Fig. 1 is a cross-sectional view showing the main part of a gas gun according to Embodiment 1 of the present invention.

Fig. 2 is a view showing a release valve of a gas gun according to a first embodiment of the present invention, wherein (a) and (b) are side views, (c) is a perspective view, and (d) is a view showing a rear end.

Figure 3 is a diagram showing the release of a gas gun relating to Example 1 of the present invention. In the cross-sectional view of the valve, (a) shows a state in which the pores are closed, (b) shows a state in which the orifice is moved while the orifice is moved, and (c) shows a state in which the pores are opened.

Fig. 4 is a view showing a discharge valve of a conventional gas gun, wherein (a) shows a state in which the pores are closed, and (b) shows a state in which the pores are opened.

Fig. 5 is a cross-sectional view showing an enlarged main portion of a gas gun according to a second embodiment of the present invention.

Figure 6 is an exploded view of the release valve of Example 2 of the present invention.

Fig. 7 is a view showing a valve sleeve of the release valve according to the second embodiment of the present invention, (a) (b) is a side view, (c) is a sectional view, and (d) is a view showing an end surface on the front end side. (e) is a view showing the end surface on the rear end side.

Fig. 8(a) and Fig. 8(b) are diagrams showing the operation of the release valve according to the second embodiment of the present invention, and Fig. 8(c) is a partial enlarged view of the portion A of Fig. 2(b).

Embodiments of the present invention will be described with reference to the drawings.

Example 1

First, a gas gun of an embodiment of the present invention will be described. The gas gun system shown in Fig. 1 can detachably insert the magazine 4 into the magazine chamber 3 provided in the grip 2 of the gun body 1. The magazine 4 is formed with a bomb chamber 6 that communicates with a barrel 5 that maintains the projectile B before firing in a standby state. The upper elastic plate 9 supported by the upper spring plate spring 7 inside the elastic chamber 6 is pushed upward.

Further, the magazine 4 is provided with a cylinder chamber 11 in which a carbon dioxide cylinder 10 is installed. The carbon dioxide cylinder 10 installed in the cylinder chamber 11 is held by screwing the lid portion 13 to the thread groove 12 formed on the inner circumference of the lower end of the cylinder chamber 11. Further, the opening portion 10a of the carbon dioxide cylinder 10 is held at the lower end portion of the gas passage 8 communicating with the upper portion of the cylinder chamber 11.

Further, in the present embodiment, as described above, the structure is such that a cylinder chamber 11 is provided in the magazine 4 of the magazine chamber 3 which is loaded in the grip 2 of the gun body 1, and a carbon dioxide cylinder 10 filled with carbon dioxide is accommodated in the cylinder chamber 11. . However, in other embodiments, the grip 2 of the gun body 1 may be provided with a cylinder chamber 11 in which the carbon dioxide cylinder 10 is housed, and the cylinder chamber 11 houses the carbon dioxide cylinder 10.

Furthermore, other embodiments may be configured such that a gas accumulator chamber (not shown) is disposed in the magazine 4 of the grip body 2 of the gun body 1 or the magazine chamber 3 of the grip 2, and Carbon dioxide is injected directly into this gas accumulator. However, when the grip 2 or the magazine 4 of the grip 2 is directly formed into a gas accumulating chamber, the gas accumulating chamber of the grip 2 or the magazine 4 must have a structure capable of withstanding high-pressure carbon dioxide.

In the magazine 4 of such a structure, a gas passage 8 is provided between the opening portion 10a of the carbon dioxide cylinder 10 as a supply source of the compressed gas and the barrel 5 of the projectile B before the emission. The projectile B to be held in the barrel 5 is ejected from the barrel 5 through the inner barrel 17 by the pressure of the compressed gas flowing through the gas passage 8.

Further, as shown in Fig. 3(a), the relief valve 16 is inserted into the air hole 15 of the valve seat member 14 fixed in the middle of the gas passage 8. The venting of the valve seat member 14 can be opened by releasing the valve 16 in the axial direction. 15. Further, the valve sleeve 19 is fixed to the mounting hole 4a formed in the upper portion of the magazine 4 in the axial direction of the valve seat member 14 (refer to Fig. 1). Further, in order to fix the valve sleeve 19 to the mounting hole 4a of the magazine 4, it is necessary to screw the thread groove 19a formed on the outer circumference of the valve sleeve 19 to the inner circumference of the mounting hole 4a formed in the magazine 4. The thread groove is fixed.

The release valve 16 of such a structure is composed of a head portion 18 and a rod portion 21 which is seated on a seat portion 14a of the valve seat member 14, and the rod portion 21 is slidably penetrated by the valve sleeve 19 Hole 20. Further, as shown in Fig. 1, the rear end of the release valve 16 is struck by the striker 23 provided in the gun body 1.

In addition, the striking iron 23 disposed on the gun body 1 is normally locked by the hook of the striker sear 25, and is in a standby state, but the trigger strut 26 is rotated by the trigger lever 26 to rotate the striker 25 . Thereby, the hook of the striker bar 25 is released, and the striking iron 23 is rotated by the spring force, and when the striker 24 strikes the rear end of the release valve 16, the release valve 16 moves forward.

In the above configuration, the appearance of the relief valve 16 is shown as a diagram shown in Figs. 2(a) to 4(d). Further, a cross-sectional view along the axis of the release valve 16 is shown as a diagram shown in Figs. 3(a) to 3(c). Further, in Fig. 3, (a) shows a state in which the air hole 15 is closed, (b) shows a state in which the air hole 15 is closed although the movement release valve 16 is moved, and (c) shows a state in which the air hole 15 is opened. .

Further, as shown in Fig. 3(a), an annular groove 34 is formed on the outer circumference of the head portion 18 of the relief valve 16, and the annular groove 34 is provided with a rubber O-ring 35. Therefore, the O-ring 35 that is fitted into the annular groove 34 is held. The state is sandwiched between the front end annular portion 38 of the head portion 18 of the discharge valve 16 and the annular convex portion 36 provided near the neck portion 28 of the discharge valve 16.

Further, the stem portion 21 of the relief valve 16 is constituted by a neck portion 28 that slides on the air hole 15 of the valve seat member 14, a flange portion 30 that slides through the through hole 20 of the valve sleeve 19, and a rod The reduced diameter portion 31 between the neck portion 28 and the crotch portion 30 of the portion 21. The reduced diameter portion 31 is formed to have an outer diameter that is smaller than the outer diameter of the neck portion 28 and the crotch portion 30 of the relief valve 16.

Further, the inner cavity 29 of the valve sleeve 19 is configured such that the valve spring 32 is mounted on the outer circumference of the stem portion 21 of the discharge valve 16. The valve spring 32 is held by a stopper ring 33 that is fixed to the annular recess 22 on the outer circumference of the rod portion 21. With such a configuration, the relief valve 16 always pushes the release valve 16 rearward (to the right of Fig. 3(a)) by the elastic action of the valve spring 32.

Therefore, in the normal state of the unbuckling machine 26, the O-ring 35 provided in the annular groove 34 of the head portion 18 of the release valve 16 is held by the valve seat member 14 by the elastic force of the valve spring 32. The inclined seat portion 14a is in a state of being in close contact with each other, and the air hole 15 is closed.

On the other hand, when the striker 23 strikes the rear end of the release valve 16 through the striker 24 (refer to Fig. 1), as shown in Fig. 3(a), the release valve 16 moves in the direction of the valve seat member 14. . At this time, in the initial stage of the movement of the release valve 16, the annular convex portion 36 formed between the annular groove 34 of the relief valve 16 and the neck portion 28 is held in the inner circumference of the step of the valve seat member 14. The state of the department 37. During this period, the air hole 15 is in a closed state, so the air hole 15 does not generate a gas flow, and the gas flow of the compressed gas does not act on the release. The O-ring 35 of the head 18 of the valve 16 is released.

Next, when the reduced diameter portion 31 of the relief valve 16 moves at the inner circumferential position of the air hole 15 of the valve seat member 14, the compressed gas passes through the gap G between the outer circumference of the reduced diameter portion 31 and the air hole 15, toward the gas passage 8. Circulation. At this time, the gas flow of the compressed gas is generated between the outer periphery of the reduced diameter portion 31 and the gap G between the air holes 15 from between the valve seat member 14 and the annular inner peripheral portion 37 of the head portion 18 of the relief valve 16. This gas flow does not have a gas pressure that deforms the O-ring 35 of the head 18 of the release valve 16. Therefore, the O-ring 35 is held in a state of being fitted to the annular groove 34 of the head portion 18 of the discharge valve 16. That is, the O-ring 35 fitted to the annular groove 34 is held by the front end annular portion 38 sandwiched between the head portion 18 of the discharge valve 16 and the neck portion 28 provided on the release valve 16 side. The state between the annular projections 36. Therefore, the O-ring 35 can resist the flow of the gas flowing into the gap G by the annular convex portion 36, and can reliably prevent the O-ring 35 from being detached from the annular groove 34. The gas passage 8 is not closed, and it is possible to supply a constant gas pressure to the shot B that is in standby on the barrel 5.

Further, in the present embodiment, the flow amount of the compressed gas can be adjusted by adjusting the outer diameter of the reduced diameter portion 31 formed by the rod portion 21 of the relief valve 16, and the compressed gas system flows through the outer circumference of the reduced diameter portion 31. The gap G with the air hole 15. Thereby, the pressure of the carbon dioxide which flows through the gas passages 15 through the air holes 15 can be appropriately adjusted.

Example 2

In the above embodiment, a rubber O-ring 35 is used as the structure for occluding the air vent 15 of the valve seat member 14 of Figs. 3(a) to (c). Pieces. In such a configuration, since the rubber-elastic O-ring 35 is in close contact with the seat portion 14a of the valve seat member 14, the sealing performance of the air hole 15 is improved. However, the O-ring 35 is made of rubber and is fitted as a separate member as described above to the outer circumference of the front end annular portion 38 of the discharge valve 16, and the O-ring 35 moves while being twisted when the release valve 16 is opened. Therefore, the timing of the opening operation of the discharge valve 16 is delayed, and the gas flowing through the air hole 15 is wasted.

Therefore, in the second embodiment, the O-ring 35 as in the first embodiment is not used, and a quick-reacting structure capable of raising the opening operation of the discharge valve 16 is employed.

The release valve 39 of the present embodiment can be applied to the same gas gun as the gas gun shown in Fig. 1 of the first embodiment. Therefore, in the present embodiment, a main part enlarged view of the gas gun shown in Fig. 5 will be described as a structure in which the discharge valve 39 of the present embodiment is attached.

The structure of the gas gun body 1 shown in Fig. 5 has the same structure as the gas gun shown in Fig. 1, and the cylinder chamber 11 of the magazine 4 is provided with a carbon dioxide cylinder 10, and the opening of the carbon dioxide cylinder 10 The portion 10a is held at the lower end of the gas passage 8 that communicates with the upper portion of the cylinder chamber 11.

In such a configuration, the mounting hole 4a is formed on the side opposite to the striker 24 in the middle of the gas passage 8 of the gas gun 1 shown in Fig. 5, and the inner periphery of the mounting hole 4a is fixed to the present embodiment. Valve sleeve 40.

The valve sleeve 40 has a flange portion 42 forming an air hole 41 in the axial direction of the center as shown in Fig. 6 or Fig. 7 (a) to (e), and has a shape to be formed. The thread groove 43 on the outer circumference of the flange portion 42 is screwed into the screw groove 4b (see FIG. 5) on the inner circumference of the attachment hole 4a provided in the gas passage 8. Further, the groove 42a in the diameter direction shown in Fig. 7(e) serves as a groove for locking the tip end of the screwdriver when the valve sleeve 40 is screwed.

Further, the valve sleeve 40 is formed with an annular recessed portion 40a on the distal end side, and an annular recessed portion 40b is formed on the rear end side, and a rubber O-ring 44 for sealing is provided in each of the annular recessed portions 40a and 40b. (Refer to Figure 8 (a), (b)). Thereby, as shown in Fig. 5, the sealing performance of the poppet valve sleeve 40 when it is attached to the mounting hole 4a of the gas passage 8 is obtained.

Further, as shown in Fig. 6, the air hole 41 formed in the axial direction of the valve sleeve 40 is formed with a plurality of gas-through through-holes 41a toward the outer end, whereby the number of the gas-through holes 41a and the size of the aperture are formed. The flow rate of the gas flowing through the air holes 41 can be adjusted.

Further, a synthetic resin valve ring 45 having lubricity is attached to the front end portion of the air hole 41 of the valve sleeve 40. As the synthetic resin material forming the valve ring 45, polyacetal is preferably used. Polyacetal (referred to as POM) is an engineering plastic that is excellent in strength, lubricity, abrasion resistance, and impact resistance. In addition, the commercially available polyacetal is known as DURACON (trade name) of Japan Polyplastics Co., Ltd.

Further, the valve ring 45 of the present embodiment has a flange portion 45a at the end as shown in Fig. 6, and has a barrel which can be pressed into the outer diameter of the enlarged diameter hole portion 40c formed on the front end side of the valve sleeve 40. Part 45b. Further, an air hole 41 having the same diameter as the air hole 41 of the valve sleeve 40 is formed inside the tubular portion 45b.

In addition, the cylindrical portion 45b of the valve ring 45 is pressed into the enlarged diameter hole of the valve sleeve 40. In the portion 40c, the air hole 41 forming the valve ring 45 and the air hole 41 forming the valve sleeve 40 are coaxial and have the same diameter. Therefore, when the release valve 39 is inserted into the air hole 41, the release valve 39 can be moved in the axial direction.

Further, as shown in Fig. 8 (a) and (b), the release valve 39 of the present embodiment has a tapered diameter reducing surface 39c which is provided at the head portion of the stem portion 39a. The reduced diameter surface 39c is seated on a seat portion 46 provided at an inner peripheral end portion of the air hole 41 of the valve ring 45.

Further, as shown in Fig. 5, the release valve 39 of the present embodiment has a structure in which the valve spring 47 is provided on the head side of the release valve 39. In the configuration of the first embodiment, as shown in Figs. 3(a) to (c), since the valve spring 32 is provided in the inner cavity of the valve sleeve 19, the release valve is provided even if the stopper ring 33 is provided. 16 doubts about the problem. On the other hand, in the present embodiment, as shown in Figs. 8(a) and (b), the inside of the valve sleeve 40 is formed only with the air hole 41, and one end of the valve spring 47 is inserted into the discharge valve. The annular groove 39e of the projection 39d of the head side of the 39 is protruded, and the other end of the valve spring 47 is abutted against the wall surface of the gas passage 8 of the gas gun 1.

With such a configuration, the discharge valve 39 inserted into the air hole 41 of the valve sleeve 40 is less prone to problems when the rod portion 39a is moved, and the valve spring 47 can be formed to have a larger diameter. Therefore, by the rigidity of the valve spring 47 being improved, the adhesion of the release valve 39 when seating the seat of the valve ring 45 can be improved.

In the present embodiment, the shank portion 39a of the release valve 39 is inserted through the air hole 41 of the valve ring 45 and the valve sleeve 40 by the above-described structure, as shown in Fig. 8(a), so that the reduced diameter surface 39c The inner circumference of the air hole 41 seated in the valve ring 45 The seat portion 46 provided in the portion thereby closes the air hole 41.

On the other hand, as shown in Fig. 8(b), the reduced diameter surface 39c of the relief valve 39 is disengaged from the seat portion 46 of the valve ring 45 by tapping the rear end of the release valve 39 with the striking iron or the striker 24. Thereby, the air hole 41 is opened.

Further, as shown in Fig. 8 (a), (b), and (c), when the relief valve 39 is moved to press the reduced diameter surface 39c of the relief valve 39 against the corner of the seat portion 46 of the valve ring 45, Since the valve ring 45 is formed of a synthetic resin such as polyacetal, the corner portion of the seat portion 46 of the valve ring 45 is crushed by the reduced diameter surface 39c of the release valve 39. Thereby, the adhesion to the reduced diameter surface 39c of the relief valve 39 is improved, which contributes to an improvement in the sealing property of the release valve 39.

Further, as shown in Fig. 8(c), the angle α formed by the reduced diameter surface 39c of the relief valve 39 is preferably 45 degrees, and at this time, the seat portion formed by the reduced diameter surface 39c of the release valve 39 is formed. The angle of 46 also becomes 45 degrees.

Further, in the present embodiment, the structure is such that a synthetic resin valve ring 45 having lubricity is provided at the tip end portion of the air hole 41 of the valve sleeve 40, and a tapered shape formed by the valve head portion 39b of the relief valve 39 is formed. The diameter surface 39c is seated on the seat portion 46 of the valve ring 45. Therefore, unlike the case where the O-ring is used, the release valve 39 is excellent in rapid reactivity, and the gas flowability through the pores 41 of the valve ring 45 is improved, and the shot can be efficiently emitted with a small amount of gas.

[Industrial availability]

The gas gun system of the invention can be utilized in the case of using carbon dioxide as a power source of the gas gun, in particular, the structure of the release valve is designed to be suitable for two Gas gun with carbon oxide pressure.

1‧‧‧ gas gun

4‧‧‧ magazine

4a‧‧‧Mounting holes

4b‧‧ Thread groove

6‧‧‧ 弹 cavity

8‧‧‧ gas passage

10‧‧‧CO2 cylinder

10a‧‧‧ openings

11‧‧‧Cylinder room

24‧‧‧Scill

39‧‧‧release valve

40‧‧‧ valve sleeve

41‧‧‧ stomata

43‧‧‧Thread groove

44‧‧‧O-ring

45‧‧‧Valve ring

47‧‧‧Valve spring

B‧‧‧projectile

Claims (1)

A gas gun is provided with a gas passage between a supply source of compressed gas and a shot of a projectile placed before being fired, and a release valve is inserted through a pore of a valve sleeve disposed on the way of the gas passage, thereby The release valve is moved in the axial direction to open and close the air hole of the valve sleeve, and a lubricated synthetic resin valve ring is installed at the front end portion of the air hole of the valve sleeve, and the rod portion of the release valve is inserted through The valve head of the valve ring has a tapered diameter reducing surface, and the valve sleeve The air hole is closed, and on the other hand, the narrowing surface of the release valve is detached from the seat of the valve ring by tapping the rear end of the release valve with a striking iron or a striker, thereby opening the air hole of the valve sleeve, which is characterized by: One end of the valve spring is inserted into the annular groove of the projection protruding toward the head side of the discharge valve, and the other end of the valve spring is abutted against the wall surface of the gas passage to be supported.