JPS5855354Y2 - gas gun gas chamber cap - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a gas chamber cap for closing off a gas chamber filled with high-pressure gas in a gas gun.

As is well known, in a gas gun, high-pressure gas is sealed in a gas chamber inside a gas chamber cylinder, and when shooting, a trigger is activated to send a predetermined amount of high-pressure gas to the barrel of the gun, and the bullet is fired by the gas pressure of the high-pressure gas. If the pressure of the high-pressure gas sealed in the gas cylinder drops below a certain pressure, the gas cylinder must be replaced with a new one.

Leaving unnecessary residual gas in the gas chamber after firing is dangerous for storage and may cause damage to the internal equipment, so it is important to remove any residual gas remaining in the gas chamber after firing. All must be discharged outside.

The easiest way to exhaust residual gas from the gas chamber is to remove the gas chamber cap, but since the gas chamber cap is under gas pressure on its entire inner surface, the gas pressure It is very difficult to remove the gas chamber cap that is screwed onto the chamber cylinder, and the gun has to be fired dry to release the residual gas little by little, which is tedious and time-consuming, and requires repeated blank shots. Doing so is undesirable as it has various negative effects on the gun.

In order to solve this problem, it has been proposed that a knob shaft with a needle at the tip is screwed onto the cap body, an O-ring is attached to the outer diameter of this knob shaft, and residual gas is exhausted by rotating the knob shaft. However, it is difficult to seal high-pressure gas with such an O-ring that does not rotate but slides, and the O-ring is also subject to severe wear and tear.

In view of this, the present invention installs a sealing material such as an O-ring or packing between the bottom wall of the cap body and the stepped part of the knob shaft, and high gas pressure acts to press the sealing material to create a seal. An embodiment shown in the drawings will be described below, in which the residual gas is quickly discharged by simply turning the operating knob.

In FIG. 1, 20 is a gas chamber cap according to the present invention, which is screwed onto a gas chamber cylinder 2A having a gas chamber 2 formed therein.

Reference numeral 1 denotes a cap body, which is composed of an outer cylinder 3 and an inner plug 5. During assembly, the inner plug 5 is screwed onto the outer cylinder 3 via a seal 4.

The inner plug 5 here has a fitting hole 8 into which the seal 6 and the knob shaft 7 fit loosely, and a through hole 9 into which the small diameter portion 7a of the knob shaft 7 loosely fits into the bottom wall 11. A vertical groove 10, 10 in the axial direction is cut halfway into the fitting hole 8.

An O-ring 13 is attached to an O-ring groove 12 provided in a bottom wall 11 of the inner plug 5.

A seal 6 having a needle 14 formed at its tip and a locking piece 15.15 on its outer diameter is screwed onto a knob shaft 7 having a stepped portion 7b, and the seal is screwed onto this knob shaft 7. 6 is fitted into the fitting hole 8 of the inner plug 5 together with the knob shaft 7 by fitting the locking pieces 15 and 15 of the seal 6 into the vertical grooves 10, 10 of the fitting hole 8.

Therefore, the knob shaft 7 is rotatably and slidably fitted into the inner plug 5, but the sealing body 6 is moved back and forth in the axial direction by a predetermined amount corresponding to the longitudinal grooves 10, 10.

Then, the operation knob 16 is fixed to the tip of the small diameter portion 7a of the knob shaft 7 with a pin 17 with an appropriate gap between the cap body 1 and the cap body 1.

18 is an O-ring attached to the outer diameter of the inner plug 5.

The gas chamber cap 20 of the present invention is as described above, and when sealing high-pressure gas into the gas chamber 2, first remove the gas chamber cap 20 from the tip of the gas chamber cylinder 2A, and then remove the gas chamber cap 20 from the tip of the gas chamber cylinder 2A.
Attach the CO2 cylinder 19 inside and screw it in again.

When the operation knob 16 is turned, the seal 6 is screwed into the knob shaft 7, and since it is fitted into the vertical grooves 10, 10 of the inner plug 5, it moves forward in the axial direction (toward the left in FIG. 1).

When the needle 14 of the advancing envelope 6 breaks through the CO2 cylinder 19, the step 7b of the knob shaft 7 is pushed by the reaction of the advancing envelope 6.
presses the O-ring 13.

When the CO2 cylinder 19 ruptures and high-pressure gas fills the gas chamber 2, the gas pressure acts as if the step 7b of the knob shaft 7 presses the O-ring 13, ensuring a secure seal and eliminating the risk of gas leakage. do not have.

When the unnecessary residual gas in the gas chamber 2 is to be discharged after firing, turn the operating knob 16 in the opposite direction.
is retracted toward the knob shaft 7 side, and the locking piece 15°15 is in the vertical groove 10,
10), and when the operating knob 16 is further turned in the same direction, the knob shaft 7 moves toward the sealing body 6 side, and the stepped portion 7b of the knob shaft 7 and the C ring 13 A gap is created between the two, so the residual gas passes through this gap and is exhausted to the outside.

Next, a second embodiment of the present invention will be described with reference to FIGS. 3 to 5. Components having the same configuration as the first embodiment will be designated by the same reference numerals in the drawings, and their explanation will be omitted.

Reference numeral 120 indicates a gas chamber cap, and the cap body 101 is composed of an outer cylinder 103, an inner plug 105 fitted into the outer cylinder 103, and a key 150 interposed between these.

A fitting hole 108 into which the knob shaft 107 loosely fits into the inner plug 105
A and a needle fitting hole 108b into which the seal 106 is loosely fitted are formed, and a stepped portion 151 is formed at the junction of both holes.

Both holes are provided with a flange 152 in the middle and a flat surface 153 cut in the tip (left side in Fig. 3.4).
06 and a knob shaft 107 screwed into this enclosure 106 are fitted together.

and the detent pin 1 in contact with the flat surface 153 of the enclosure 106
54 is driven into the inner plug 105.

Therefore, the flange 152 of the sealing body 106 is connected to the needle fitting hole 10.
It moves back and forth in the axial direction by a predetermined amount from when it comes into contact with the stepped portion 151 of 8b until it comes into contact with the locking pin 154.

Further, a gasket 11 made of polytetrafluoroethylene resin is provided between the stepped portion 107b of the knob shaft 107 and the bottom wall 11 of the inner plug 105.
3 is installed.

Since the operating knob 116 does not shift in the axial direction, a compression spring 155 is provided between the operating knob 116 and the outer cylinder 103.

Note that the collar 152 is provided with a communication hole 156 for rapid passage of CO2 gas.

7 The operation of the device according to the second embodiment as described above is the same as that of the first embodiment, so the explanation thereof will be omitted, but FIG. FIG. 4 shows a state in which residual gas is discharged.

1 In the second embodiment, a locking pin 154 is provided in order to move the enclosure 106 screwed onto the knob shaft 107 back and forth in the axial direction, which simplifies the structure and reduces manufacturing costs. Costs can be reduced.

Note that the manner in which the cap body 1, 101 is screwed onto the gas chamber 2 is not limited to the above two embodiments; for example, the outer cylinder 3, 103 of the cap body 1, 101 and the inner plug 5, 10
5 in one piece or the cap body 1,101
It goes without saying that the gas chamber cylinder 2A may have a male thread and the gas chamber cylinder 2A may have a female thread.

As described above, the present invention provides a seal between the stepped portion of the knob shaft and the bottom wall of the cap body, so that leakage of high-pressure gas can be reliably prevented.

In addition, high-pressure gas can be quickly discharged from the gas chamber by simply turning the control knob, which has the advantage that residual gas can be discharged easily and quickly when shooting is finished. have.

[Brief explanation of drawings]

The drawings show an embodiment of the gas chamber cap for a gas gun according to the present invention, and FIG. 1 is a side sectional view of the first embodiment, FIG. The figure is a side sectional view of the second embodiment shown in a different scale from the first embodiment, showing a state where the CO2 cylinder has been pierced, and FIG. 4 is a side sectional view of the second embodiment as well. Indicates the state in which residual gas is discharged,
FIG. 5 is a sectional view of a main part taken along line B-B in FIG. 3. 1.101...Cap body, 6,106...
... Enclosure, 7゜107 ... Knob shaft, 7b
, 107b...Step part, 11...Bottom wall,
13...O-ring, 20,120...
Gas chamber cap, 113...Patsukin, 108
b...Needle body fitting hole, 151...Step part,
152... Tsuba, 153... Plane, 15
4... Detent pin.

Claims (1)

[Scope of utility model registration request] 1. A knob shaft that penetrates the bottom wall of the cap body and a seal that is screwed onto the knob shaft are fitted into the cap body, the knob shaft being rotatable and sliding, and the seal being loosely fitted into the cap body by a predetermined amount in the axial direction. A gas chamber cap for a gas gun, which is fitted so that it can move back and forth, and a sealing material is attached between the stepped part of the knob shaft and the bottom wall of the cap body. 2. A step is formed in the needle fitting hole of the cap body, a flange is provided in the middle part of the seal, and a flat surface is cut in the tip part,
A detent pin in contact with this plane is driven into the cap body so that the flange of the envelope moves back and forth in the axial direction by a predetermined amount from when it comes into contact with the stepped part of the needle fitting hole until it comes into contact with the detent pin. A gas chamber cap for a gas gun according to claim 1 of the utility model registration claim, characterized in that: