JP2014151663A - Gas bomb hole-opening device - Google Patents

Abstract

Disclosed is a gas cylinder opening device that uses an agent having a non-explosive composition to quickly expand an expansion unit such as a life jacket in a stable time without being restricted by the Explosives Control Law.
A piston 30 includes a gas ejection flow path, and includes a pin portion that opens a sealing plate 7 and an O-ring mounting portion that mounts an O-ring 38 that is in close contact with an inner wall of a piston guide hole 25. Before the operation of the gas generator 40, the piston has the pin portion positioned on the front surface of the seat 29, the O-ring mounting portion positioned on the gas generator side from the gas vent hole 26, and after the operation of the gas generator, the gas The piston is pushed out to the gas cylinder 5 side by the gas pressure generated by the combustion of the generating agent, the pin portion pierces the sheet and the sealing plate and enters the gas cylinder, and the gas is discharged into the gas discharge hole 24 through the gas ejection channel. The O-ring mounting part moves from the gas vent hole to the gas cylinder side and discharges the residual pressure from the gas vent hole.
[Selection] Figure 2

Description

  The present invention relates to a gas cylinder opening device capable of quickly and stably expanding an expansion unit such as a life jacket.

For example, the following expansion units are known that are expanded by the gas in the gas cylinder.
(1) Life jacket that lifts the wearer to the surface in the event of a marine accident or drowning accident (2) Lifesaving used to escape from a ship in the event of a marine accident or drowning accident, or to rescue a victim in the event of a flood Boat (3) Airbag-type stretcher used for transporting injured people in the event of an accident or disaster (4) Float for a buoy that floats a float that floats the buoy on the sea surface (5) High in the event of a disaster such as a fire Life mats used for emergency escape from places (6) Bike life jackets that protect passengers and reduce injuries when a motorcycle falls, and inflate when falling (7) Fall when falling from work at high altitude Life jacket for shock absorption that protects and reduces injury and expands when falling

Since devices for expanding these expansion units have gas cylinders arranged inside the expansion units, they are easy to handle because they are small and compact during storage. Also, life jackets do not burden the wearer's movement when worn. The gas cylinder is opened only in an emergency, and the expansion unit is expanded by ejecting the gas inside.
Opening gas cylinders is a time of urgency, especially in life jackets that protect life mats and fallers, it is necessary to quickly expand the expansion unit to protect the victims and victims (hundreds of (Extension in the ms order is required).
Therefore, the gas in the gas cylinder needs to be ejected instantaneously, and a gas whose ejection time is stable is required.

  2. Description of the Related Art Conventionally, an apparatus for opening a gas cylinder sealing plate to expand an expansion unit such as a life jacket is an apparatus that directly crushes a gas cylinder sealing plate by the pressure of an explosive or explosive (see, for example, Patent Document 1). , An apparatus in which an explosion charge is activated by a shock wave of a pyrotechnic device and a hole is made in the casing of the gas cylinder by the shock wave (see, for example, Patent Document 2), and a device in which a piston head breaks through a gas cylinder sealing plate by the pressure of the detonator For example, a patent document 3) and a mechanical gas cylinder unsealing device (for example, see patent document 4) are known.

Patent Document 1 discloses an air bag inflating device that directly opens one end of a fluid enclosure (gas cylinder) by the explosive pressure of an explosive by an initiation means and instantaneously ejects fluid in the fluid enclosure.
Since the air bag inflating device of Patent Document 1 can always instantaneously eject fluid from a fluid-filled container, for example, an assisting device for a human body that absorbs a drop impact from a high place, etc. This is extremely advantageous when performance is required.
Patent Document 1 discloses an example in which this air bag inflating device is applied to a human body shock absorption aid. According to this human body shock absorbing auxiliary tool, for example, when the air bag is dropped from a high place, the air bag can be inflated instantaneously, and the air bag can absorb the drop impact on the human body. This is extremely advantageous for workers in high-altitude workplaces.

Patent Document 2 discloses a gas management apparatus including a life jacket and a puncture device for an inflatable unit such as a raft, in particular, an apparatus for life jacket, and a management for transferring gas from a pressurized gas cylinder to an inflatable unit. A method and apparatus for using the apparatus is disclosed.
The gas management apparatus disclosed in Patent Document 2 includes a gas inlet that can be firmly fixed to a casing of a container (gas cylinder) containing gas whose pressure is adjusted, and a gas that can be firmly fixed to an inflatable unit and a puncture device in order to make a hole in the casing. And the puncture device includes a pyrotechnic device that, when activated, generates a shock wave that punctures the casing of the container and releases the gas from the container toward the inflatable unit, Including one stimulus applicator and an explosion charger, the energy of the stimulus applier activates the explosion charger to create a shock wave.

Patent Document 3 includes a foldable airbag, a gas cylinder for inflating the airbag, and a means for opening the sealing plate of the gas cylinder, and means for opening the sealing plate of the gas cylinder by an impact sensor. The piston is actuated by the detonation energy of the detonator that is actuated by an electrical signal to break through the sealing plate of the gas cylinder.
In Patent Document 3, the piston is tapered and thin so that the cylinder can be easily opened and the diameter of the hole is increased.
In Patent Document 3, an orifice is provided in the piston so that the return of the piston becomes smooth, and the explosion pressure after the operation of the initiator is discharged from the ejection hole through the orifice.
In Patent Document 3, a spring is interposed between the piston and the gas cylinder so that the return of the piston becomes smoother.

Patent Document 4 discloses a cylinder opening device that does not use explosives.
In Patent Document 4, a cylinder is housed in a chassis on which a cylinder opening device is mounted, an abutting surface is formed on the inner wall of the chassis and abutted against one end side of the compression coil spring, and the other end side is idle in the chassis. Pressed by the pressing surface of the fitted support tool, the support tool supports and fixes the cylinder, the chassis is positioned above the sealing plate, a hollow needle is attached, and an upper part of the peripheral surface of the chassis forms an insertion hole The upper part of the chassis forms a hinge, and a lever is attached to be pivotable in the direction of the arrow about the hinge. A taper part is formed on the chassis side of the lever, and the taper part can be inserted into the insertion hole. In this manner, the lever hooks the holding member on the hook portion, wraps the holding member around the outer periphery of the chassis, and the surface of the chassis is arranged so that the heating element contacts the holding member.

JP 11-347140 A Special table 2009-544527 gazette JP-A-7-156741 JP-A-10-95392

July 24, 1995 Ministry of International Trade and Industry Notification No. 458 March 23, 2001 Ministry of Economy, Trade and Industry Notification No. 194 October 15, 2002 Ministry of Economy, Trade and Industry Notification No. 357 July 28, 2009 Ministry of Economy, Trade and Industry Notification No. 255

Since patent documents 1-3 use explosives, they are regulated by the Explosives Control Law.
In Patent Documents 1 to 3, even when the explosives control law is not applied, the apparatus is limited to the specifications in accordance with the application exemption product notification contents shown in Non-Patent Documents 1, 2, 3, and 4.
Since Patent Documents 1 and 2 break the cylinder sealing plate with explosives, it becomes a mechanism that directly crushes the sealing plate with the pressure at the time of burning of the chemical, rather than the method of applying pressure to the piston to increase the impact force and opening the sealing plate A lot of dosage is needed.
When the amount of explosives increases, the generated pressure increases, so that the risk of destruction of the device casing and scattering of casing fragments increases during operation.
For this reason, it is necessary to increase the size and strength of the apparatus as the dosage increases.

Patent Document 3 describes a method of pressurizing a piston with an initiating device and breaking the gas cylinder sealing plate with the piston. By forming the tip of the piston into a tapered shape, the opening of the sealing plate is facilitated. Although it is described that the diameter is increased, when the piston tip is formed thin in a taper shape, when the pressurized piston moves while being inclined with respect to the cylinder sealing plate hole (hereinafter referred to as misalignment), the piston Does not penetrate, so the sealing plate cannot be properly opened by the piston.
It should be noted that the piston cannot enter the portion other than the cylinder sealing plate hole.

Patent Document 3 states that, in order to make the return of the piston after movement smooth, an orifice is provided in the piston, and the explosion pressure after operation of the detonator is released from the ejection hole through the orifice, or against the inner diameter of the cylinder chamber However, when the piston outer diameter is reduced and the clearance from the cylinder chamber is increased, misalignment is likely to occur particularly when the piston moves.
If the piston is provided with an orifice or the clearance between the cylinder chamber and the piston is increased, the pressure during operation of the detonator leaks from the orifice and the clearance, so that the piston cannot be pressurized efficiently.
Therefore, it is necessary to set the amount of generated gas in consideration of the pressure leakage, and as a result, a larger amount of drug is required.
For this reason, it is necessary to increase the size and strength of the apparatus as the dosage increases.

Patent Document 3 aims to make it easier for the piston to return by releasing the explosion pressure after the start-up device is actuated, but the return state of the piston also changes in the state of solid residue generation after chemical combustion.
Even if the explosion pressure of the detonator is released, if a solid residue adheres to the periphery of the piston, the solid residue attached to the piston and the cylinder chamber bite, and the piston does not return to its original position.
In this case, even if a spring is interposed between the piston and the gas cylinder, since the piston is fixed, it is difficult to return the moved piston.
If the piston does not return, the piston closes the sealing plate opening, so that an event occurs in which the gas ejection time in the gas cylinder becomes longer or the gas does not eject, and the gas ejection time becomes unstable.

Patent Document 4 describes a mechanical cylinder opening method, but describes an embodiment in which a needle provided with a slit in a hollow needle is used.
When a piston of this shape is pressurized with gas during chemical combustion to open the gas cylinder sealing plate, pressure leakage occurs from the hollow portion.
Therefore, it is necessary to set the amount of generated gas in consideration of the pressure leakage, and a larger amount of drug is required.
As a result, it is necessary to increase the size and strength of the device as the dosage increases.
Further, when the pressurized piston is misaligned with respect to the gas cylinder sealing plate hole, the piston does not enter, so that the sealing plate cannot be appropriately opened by the piston.

  The present invention has been made to solve such conventional problems, and its purpose is to use a drug having a non-explosive composition so that it is not subject to the regulations of the Explosives Control Law, such as a life jacket. It is an object of the present invention to provide a gas cylinder opening device capable of expanding an expansion unit quickly and in a stable time.

The invention according to claim 1
A gas cylinder opening for opening a sealing plate provided at the mouth of a gas cylinder arranged in a deployable expansion unit that seals the opening with a sealing part, and for discharging the gas in the gas cylinder to expand the expansion unit In the apparatus, an opening device that is attached to the sealing portion, attaches a mouth portion of the gas cylinder, opens a sealing plate of the gas cylinder, and ejects gas in the gas cylinder into the expansion unit, and the opening A gas is produced by combustion of a gas generating agent composed of a non-explosive composition component, which is mounted on the opener facing the mouth of the gas cylinder and a sheet disposed on the front surface of the sealing plate of the gas cylinder mounted on the container. A gas generator that generates pressure, and a piston that is disposed between the sheet and the gas generator in the aperture, and that opens the sealing plate by the gas pressure of the gas generator, The aperture A mounting part to be attached to the chain part, a gas cylinder attaching part for attaching the mouth part of the gas cylinder, a piston guide hole for arranging the piston, a gas generator attaching part for attaching the gas generator, and the piston guide; A gas discharge hole that communicates with the hole; and a gas vent hole that communicates with the piston guide hole and is spaced apart from the gas discharge hole. The piston includes a gas ejection channel and opens the sealing plate. A pin portion that is perforated, and an O-ring mounting portion that mounts an O-ring that is in close contact with the inner wall of the piston guide hole, and before the operation of the gas generator, the piston has the pin portion on the front surface of the seat. The O-ring mounting portion is positioned on the gas generator side of the gas vent hole, and after the operation of the gas generator, the piston is moved to the gas cylinder by the gas pressure generated by the combustion of the gas generating agent. Extruded to the mouth side, the O-ring mounting part moves to the mouth part side of the gas cylinder from the gas vent hole to release residual pressure from the gas vent hole, and the pin part pierces the sheet and the sealing plate Then, the gas is introduced into the mouth of the gas cylinder, and the expansion unit is expanded by ejecting the gas from the gas ejection hole through the gas ejection channel.

According to a second aspect of the present invention, in the gas cylinder opening device according to the first aspect of the present invention, the piston includes the gas ejection channel, opens a sealing plate of the gas cylinder, and enters the opening of the gas cylinder. And an O-ring mounting portion that attaches the O-ring and terminates the intrusion of the pin portion when it comes into contact with the sealing plate of the gas cylinder.
According to a third aspect of the present invention, in the gas cylinder opening device according to the second aspect of the present invention, the gas ejection flow path is configured by providing a groove in the longitudinal direction of the pin portion.

According to a fourth aspect of the present invention, in the gas cylinder opening device according to the second aspect of the present invention, the gas ejection flow path is provided with a groove in the longitudinal direction of the pin portion, and the wall portion of the O-ring mounting portion is provided with the groove. It is characterized by being provided with a notch continuous to the groove.
According to a fifth aspect of the present invention, in the gas cylinder opening device according to the second aspect of the present invention, the gas ejection flow path is configured by forming a spiral portion by threading the pin portion. It is characterized by.

According to a sixth aspect of the present invention, in the gas cylinder opening device according to the second aspect of the present invention, the gas ejection passage forms a spiral portion by threading the pin portion, and the O-ring mounting portion It is characterized by comprising the notch part connected to the said groove | channel in the said pin part side wall part.
According to a seventh aspect of the present invention, in the gas cylinder opening device according to the second aspect of the present invention, the gas ejection flow path is provided with a hollow portion in the axial direction of the pin portion and in a direction perpendicular to the hollow portion. It is configured by providing a through hole communicating with the hollow portion.

According to an eighth aspect of the present invention, in the gas cylinder opening device according to the second aspect of the present invention, the gas ejection flow path is provided with a hollow portion in the axial direction of the pin portion, and the pin of the O-ring mounting portion. It is constituted by providing a through hole communicating with the hollow part in a direction perpendicular to the hollow part in the side wall part.
According to a ninth aspect of the present invention, in the gas cylinder opening device according to the first aspect of the present invention, the piston includes the gas ejection flow path, and the pin that opens the sealing plate of the gas cylinder and enters the gas cylinder. And a head part that terminates the intrusion of the pin part when it comes into contact with the sealing plate of the gas cylinder, and an O-ring mounting part that attaches the O-ring.

According to a tenth aspect of the present invention, in the gas cylinder opening device according to the ninth aspect of the present invention, the pin portion includes a slope having a flat or spherical tip and an angle of 19 ° to 130 ° from the tip side. It is characterized by that.
According to an eleventh aspect of the present invention, in the gas cylinder opening device according to the ninth aspect of the invention, the pin portion has a flat or spherical tip, and has an angle of 10 ° to 95 ° from the tip side to the terminal portion. It is provided with a slope to be attached.

According to a twelfth aspect of the present invention, in the gas cylinder opening device according to the ninth aspect of the present invention, the pin portion includes a slope having a flat or spherical tip and an angle of 19 ° to 130 ° from the tip side. Further, it is characterized in that a slope is provided to make an angle smaller than the angle provided on the tip side from the middle of the pin part to the terminal part.
According to a thirteenth aspect of the present invention, in the gas cylinder opening device according to the ninth aspect of the present invention, the gas ejection flow path is provided with a groove in the pin portion and the head portion, and the groove of the pin portion and the head portion. It is comprised by making it communicate.

According to a fourteenth aspect of the present invention, in the gas cylinder opening device according to the ninth aspect of the invention, the gas ejection flow path is formed by subjecting the pin portion to threading to form a spiral portion, and a groove in the head portion. Provided, and the spiral portion and the groove are communicated with each other.
According to a fifteenth aspect of the present invention, in the gas cylinder opening device according to the ninth aspect of the present invention, the gas ejection flow path is provided with a hollow portion in the pin portion, and the head portion is perpendicular to the hollow portion of the pin portion. A through hole is provided in a direction, and the hollow portion of the pin portion and the through hole of the head portion are communicated with each other.

Since the present invention uses a gas generating agent having a non-explosive composition, it is possible to provide a gas cylinder opening device that is not restricted by the Explosives Control Law and is not limited to notification of exempted products.
The present invention can provide a small gas cylinder opening device in order to prevent pressure leakage when the piston is moved by pressurizing the piston with gas pressure.
In the present invention, since the gas ejection flow path is formed in the pin portion so that the gas in the gas cylinder is released even if the piston does not return, the gas in the gas cylinder can be ejected quickly and in a stable time. Can be adjusted.
According to the present invention, the sealing plate is largely opened by setting the angle of the pin portion of the piston, and the gas jet flow from the pin portion to the head portion so that the gas in the gas cylinder is released even if the piston does not return. Since the passage is formed, the gas in the gas cylinder can be adjusted so that it can be ejected quickly and in a stable time.

It is a schematic diagram which shows the example which attached the gas cylinder opening apparatus which concerns on one Embodiment of this invention to the expansion | swelling unit. It is an enlarged view which shows the principal part of the gas cylinder opening apparatus of FIG. It is a side view of the piston of the gas cylinder opening apparatus of FIG. It is a perspective view of the piston of the gas cylinder opening apparatus of FIG. It is a principal part enlarged view which shows the state which the gas cylinder opening apparatus of FIG. 1 act | operates and ejects gas. It is the schematic of the sealing plate hole of the gas cylinder used for FIG. It is a side view of the conventional piston. It is the schematic of the sealing plate hole of the gas cylinder opened by the conventional piston of FIG. It is the schematic which shows the example which opens the sealing plate of a gas cylinder with the conventional piston. It is a side view of the piston used for the gas cylinder opening apparatus of FIG. It is a side view of the piston used for the gas cylinder opening apparatus of FIG. It is a side view of the piston used for the gas cylinder opening apparatus of FIG. It is a side view of the piston used for the gas cylinder opening apparatus of FIG. It is a side view of the piston used for the gas cylinder opening apparatus of FIG. It is a side view of the piston used for the gas cylinder opening apparatus of FIG. It is a side view of the piston used for the gas cylinder opening apparatus of FIG. It is a side view of the piston used for the gas cylinder opening apparatus of FIG. It is the schematic which shows the sealing board of the gas cylinder opened by the gas cylinder opening apparatus of FIG. It is a front view of the piston used for the gas cylinder opening apparatus of FIG. It is a perspective view of the piston used for the gas cylinder opening apparatus of FIG. It is a side view of the piston used for the gas cylinder opening apparatus of FIG. It is a perspective view of the piston used for the gas cylinder opening apparatus of FIG. It is sectional drawing of the piston used for the gas cylinder opening apparatus of FIG. It is a side view of the piston used for the gas cylinder opening apparatus of FIG. It is a side view of the piston used for the gas cylinder opening apparatus of FIG. It is sectional drawing of the piston used for the gas cylinder opening apparatus of FIG. It is the schematic which shows the sealing board of the gas cylinder opened by the gas cylinder opening apparatus of FIG. It is the schematic which shows the sealing board of the gas cylinder opened by the gas cylinder opening apparatus of FIG. It is a perspective view of the piston used for the gas cylinder opening apparatus of FIG. It is a perspective view of the piston used for the gas cylinder opening apparatus of FIG. It is sectional drawing of the piston used for the gas cylinder opening apparatus of FIG. It is a perspective view of the piston used for the gas cylinder opening apparatus of FIG. It is the schematic which shows the gas cylinder opening apparatus used for the experiment example. It is sectional drawing of the holder of FIG. It is a side view of the piston of FIG. It is a side view of the piston of FIG. It is a side view of the piston of FIG. It is a perspective view of piston A. It is a side view of piston A. It is a perspective view of piston B. It is a side view of piston B.

Hereinafter, the present invention will be described based on embodiments shown in the drawings.
FIG. 1 shows an example in which a gas cylinder opening device 10 according to an embodiment of the present invention is attached to an expansion unit 1.
In this embodiment, the gas cylinder opening device 10 includes a gas cylinder opening device 20 and a gas generator 40 as shown in FIGS. 1 and 2.
The expansion unit 1 is sealed by fixing the plate 3 to the opening 2 with a bolt or the like. The expansion unit 1 is deployed by gas ejected from the gas cylinder 5.
In FIG. 1, the expansion unit 1 is shown in a partially expanded state so that the structural shape of the expansion unit 1 can be understood. Before operation, the expansion unit 1 is folded into a container or the like according to the intended use. Stored.

The central portion of the plate 3 is provided with a gas generator mounting hole 3a having a female screw portion (not shown) on the inner periphery. A male screw portion 27 provided on the outer periphery of the holder 21 of the gas cylinder opener 20 is screwed into the gas generator mounting hole 3a. Between the holder 21 and the plate 3, as a plate position adjustment, the washer 4 is a concave portion provided on the outer periphery connected to a part of the male screw portion 27 of the holder 21 of the gas cylinder punch 20 and the male screw portion 27. 28 to be mounted.
As shown in FIG. 2, the gas cylinder 5 is filled with a compressed gas or a liquefied gas, a sealing plate 7 is attached to the mouth portion 6, and gas is ejected when the sealing plate 7 is opened. A male screw portion 6 a is provided on the outer periphery of the mouth portion 6 of the gas cylinder 5 and is screwed to a female screw portion 22 a provided in the gas cylinder mounting hole 22 of the holder 21 of the gas cylinder opener 20.

As shown in FIGS. 1 and 2, the gas cylinder opener 20 includes a holder 21, a seat 29, a piston 30, and an O-ring 38 attached to the piston 30, and the gas cylinder 5 is disposed inside the expansion unit 1. Be placed.
The holder 21 is formed of a cylindrical body made of a metal such as iron, stainless steel, or aluminum. The holder 21 is provided with a gas cylinder mounting hole 22 provided with a female screw part 22a for screwing a male screw part 6a provided in the mouth part 6 of the gas cylinder 5 at one end, and provided at the outer periphery of the gas generator 40 at the other end. The gas generator mounting hole 23 is provided with a female screw portion 23a to which the male screw portion 42 is screwed. The gas cylinder mounting hole 22 and the gas generator mounting hole 23 are formed so as to communicate coaxially.
The holder 21 includes a male screw portion 27 for screwing a female screw portion (not shown) provided in the gas generator mounting hole 3 a of the plate 3 on the outer periphery of the other end portion, and is connected to the male screw portion 27. A recess 28 is provided for attaching the washer 4 mounted for adjusting the plate position.

Between the gas cylinder mounting hole 22 and the gas generator mounting hole 23, after the gas cylinder 5 is opened, the gas discharge hole 24 for discharging the gas in the gas cylinder 5 and the piston guide hole 25 for arranging the piston 30 and the seat 29 are provided. And a gas vent hole 26 for releasing the residual pressure after the movement of the piston 30.
The gas discharge hole 24 and the gas vent hole 26 are provided at one place in the vertical and horizontal directions or symmetrically with respect to the axis of the holder 21. The gas discharge hole 24 is provided at a position communicating with the groove 34 provided in the head portion 33 of the piston 30 after movement, and the diameter is desirably 3.0 mm or more.

The gas vent hole 26 is provided so as to communicate with the piston guide hole 25 immediately after the O-ring mounting portion 35 of the piston 30 after the movement of the piston 30 and is blocked by the O-ring 38 when the piston 30 moves so that no gas leakage occurs. The piston 30 can be pressurized efficiently, and the residual pressure can be released after the piston 30 has opened the sealing plate 7 of the gas cylinder 5. The diameter of the gas vent hole 26 is desirably 0.5 mm or more.
The sheet 29 is made of a resin such as polyester, for example, and as shown in FIGS. 1 and 2, as a protection for the sealing plate 7 of the gas cylinder 5, the tip 32 a side of the pin portion 32 of the piston 30 in the piston guide hole 25. The piston 30 moves due to vibration and prevents the sealing plate 7 from being damaged. The thickness of the sheet 29 is desirably 0.3 mm, which is about the same as the thickness of the sealing plate 7 of the small gas cylinder 5.

The piston 30 is made of, for example, a metal such as iron, stainless steel, or aluminum. As shown in FIGS. 1 to 5, the piston 30 receives a pressure and pierces the sealing plate 7 of the gas cylinder 5 to open the sealing plate 7. The head portion 33 connected to the pin portion 32 and the O-ring mounting portion 35 connected to the head portion 33 are provided.
The pin portion 32 has a tip 32a that is flat or spherical and has an angle of 19 ° to 130 ° that is wide from the tip 32a to the rear, thereby correcting misalignment during piston movement, and a gas cylinder. 5 sealing plate 7 can be greatly opened.
The head portion 33 is formed in a tapered shape whose outer diameter is larger than the tip 32 a of the pin portion 32 so as to be larger than the diameter of the mouth portion 6 of the gas cylinder 5. Therefore, when the pin portion 32 is stuck in the sealing plate 7 of the gas cylinder 5 and the sealing plate 7 is opened, the intrusion of the pin portion 32 can be stopped.

On the outer periphery between the pin portion 32 and the head portion 33, a groove 34 for forming a gas ejection flow path in the gas cylinder 5 is formed in the axial direction even if the piston 30 does not return after the piston 30 moves.
An O-ring mounting portion 35 for mounting an O-ring 38 is formed at the rear portion of the head portion 33 by a wall portion 36 connected to the head portion 33 and a wall portion 37 positioned at the rear end portion of the piston 30.
The O-ring 38 has a function of holding the piston 30 in the piston guide hole 25 before the operation of the gas cylinder opening device 10 and pressure leakage and misalignment in the piston guide hole 25 when the piston 30 is moved by the operation of the gas cylinder opening device 10. And a prevention mechanism.

As shown in FIGS. 1 and 2, the gas generator 40 is composed of a gas generator 40a and a cylindrical body having a cup shape made of metal such as iron, stainless steel, and aluminum. A holder 41 to be housed and a sealing agent 50 such as an epoxy adhesive for fixing the gas generating part 40a to the holder 41 are configured.
In the gas generator 40, a male screw portion 42 provided on the outer periphery of the holder 41 is screwed into a female screw portion 23 a provided in the gas generator mounting hole 23 of the holder 21 of the gas cylinder opener 20.
The gas generating unit 40a includes a bottomed tube body 43 made of a cylindrical container that is open only on one side, a gas generating agent 44, a cap 45, an igniting agent holder 46, an igniting agent 47, and a plug with an electrical bridge line. 48.

The tube body 43 is made of, for example, a soft metal material such as aluminum, and is easily broken by the reaction heat and the reaction gas pressure of the gas generating agent 44 that is a non-explosive composition. The thickness of the bottomed vertex 43a of the tube body 43 is 0.1 mm.
The tube body 43 may be anything as long as it is a soft metal material with good workability. For example, aluminum (for example, A1-6016-0) is used to avoid confusion with an electric detonator using copper.
The tube 43 is filled with the gas generating agent 44 in the range of 0.05 g to 0.30 g. As the gas generating agent 44, a low vibration / low noise crushing chemical gunsizer (trade name, manufactured by Nippon Koki Co., Ltd.) is used. This is a non-explosive crushing composition (for example, refer to Japanese Patent Application Laid-Open No. 11-029389) that crushes rock mass and the like without requiring a consumption permit in exactly the same procedure as the crushing method using explosives.

The gas generating agent 44 is not intended to crush the bedrock or the like, but to change the gas pressure to the purpose of moving the piston. As a result, the gas pressure variation can be reduced by making the particle size of the gas generating agent 44 uniform. I found. Further, it is possible to change the dose of the gas generating agent 44 according to the piston shape to be moved.
For example, as shown in Table 1, the gas generating agent 44 is composed of a chemical having a non-explosive composition. The chemicals of the non-explosive composition shown in Table 1 are adjusted to a particle size of 24 Tyler mesh passage 42 Tyler mesh stopping, and reduce pressure variation. Gas (pressure) is generated during combustion.

In the tube body 43, a bottomed cap 45 made of a resin cylindrical container that is opened only on one side as a partition wall is arranged to prevent mixing of the filled gas generating agent 44 and the ignition agent 47. .
The cap 45 has a bottom 45a having a thickness of 0.5 mm or less so that it can be easily broken by the reaction heat and reaction gas pressure of the igniting agent 47, and in order to block the discharge path to the igniting agent 47 due to static electricity, ), A resin such as polyethylene (PE) is used and inserted into the igniter holder 46. The cap 45 and the igniter holder 46 are provided with an igniting agent 47 made of a non-explosive composition and an electric bridge line (for example, platinum-iridium wire) 49 of a plug with an electric bridge line 48.
As shown in Table 2, the ignition powder 47 is composed of a chemical having a non-explosive composition. The igniting agent 47 is ignited by the heat of the bridge portion 49 and burns the gas generating agent 44. When the igniting agent 47 is filled in the range of 0.06 g to 0.20 g, it operates normally.

The embolus 48 with a bridge has a gas generating agent after the igniter 47 is filled in the range of 0.06 g to 0.20 g after the igniter holder 46 is inserted and the cap 45 is inserted into the igniter holder 46. 44 is press-fitted into the filled tube 43, and the crimped portions 43 b and 43 c are formed at two locations from the outside of the tube 43, thereby being fixed to the tube 43. The crimping portions 43b and 43c are usually two stages, but may be one stage or three stages.
The caulking body 43 is inserted into the holder 41 after crimping the plugging plug 48 with the bridge line, and the sealant 50 is placed between the holder 41, the plugging bridge 48 with the bridge line, and the lead wire 51 communicating with the plugging plug 48 with the bridge line. By filling in, gas generating part 40a and holder 41 are fixed.
Further, the backward gas ejection when the gas generating part 40 a ignites is prevented by the sealing agent 50 filled in the holder 41.

Next, the operation of this embodiment will be described.
As shown in FIGS. 1 and 2, the gas cylinder opening device 10 before the operation is provided with a mouth 6 of the gas cylinder 5 attached to one end of the holder 21 and a gas generator 40 attached to the other end. With the seat 29 of the piston guide hole 25 and the piston 30 arranged, the gas guide 5 is mounted on the plate 3 that constitutes the sealing portion.
And the expansion | swelling unit 1 which encloses the gas cylinder 5 and the gas cylinder opener 20 is folded, and is accommodated in a container etc. according to the intended use.
The piston 30 has a pin portion 32 located on the front surface of the seat 29, an O-ring 38 attached to the O-ring attachment portion 35 located on the gas generator 40 side from the gas vent hole 26, and an O-ring attachment portion 35. The rear wall portion 37 is disposed on the front surface of the tube 43 of the gas generator 40.

At the time of operation, first, when a current is passed through the lead wire 51 of the plug 48 with the bridge line via an ignition circuit (not shown), the bridge line 49 becomes high temperature, the ignition agent 47 is ignited, and the cap 45 The bottom 45a is broken.
Next, the gas generating agent 44 is ignited by the combustion of the ignition powder 47, and the bottom 43 a of the tube body 43 is broken.
Next, gas is generated by combustion of the gas generating agent 44, and the piston 30 moves in the piston guide hole 25 of the holder 21 toward the seat 29.

Next, when the O-ring 38 passes through the gas vent hole 26 of the holder 21 as the piston 30 moves, the residual pressure of the gas generating agent 44 is released from the gas vent hole 26 of the holder 21.
Next, the moved piston 30 breaks the sheet 29 and the sealing plate 7 of the gas cylinder 5 as shown in FIG.
Next, the compressed gas or liquefied gas of the gas cylinder 5 is ejected from the gas discharge hole 24 of the holder 21 through the gap 34 forming the gap between the broken sealing plate 7 and the pin portion 32 and the gas ejection flow path of the piston 30. .
Next, the expansion unit 1 is quickly and stably deployed by the gas released from the gas release 24.

As described above, the gas cylinder hole device 10 according to the present embodiment is not subject to the regulations of the Explosives Control Law because it uses a chemical having a non-explosive composition.
Moreover, the gas cylinder hole-opening apparatus 10 which concerns on this embodiment is not restrict | limited also to an application exclusion product notification content, and can provide the gas cylinder hole-opening apparatus 10 of a free shape.
Moreover, the gas cylinder related-hole apparatus 10 which concerns on this embodiment pressurizes the piston 30, and uses the piston 30 to open the sealing plate 7 of the gas cylinder 5, so that it is used from the conventional method in which the sealing plate 7 of the gas cylinder 5 is directly broken by pressure. The dosage is small, which leads to downsizing of the device.

Further, in the gas cylinder related hole device 10 according to the present embodiment, when the piston 30 moves through the piston guide hole 25 of the holder 21, the piston 30 moves while maintaining an airtight state by the O-ring 38, and pressure leakage occurs. Without being performed, the piston 30 is pressurized efficiently.
Therefore, the amount of drug used is small, which leads to downsizing of the device.
Further, the gas cylinder related hole device 10 according to the present embodiment is provided with the gas vent hole 26 immediately after the O-ring mounting portion 35 after the movement of the piston 30 as a residual pressure release mechanism. Therefore, the piston 30 can be efficiently pressurized without causing gas leakage, and after the piston 30 has opened the sealing plate 7 of the gas cylinder 5, the residual pressure can be released.

Next, misalignment of the piston 30 will be described.
First, the hole diameter d of the sealing plate 7 of the gas cylinder 5 will be described with reference to FIG.
The hole diameter d of the sealing plate 7 of the gas cylinder 5 varies depending on the type of the gas cylinder. However, since the sealing plate hole diameter is determined for each type of gas cylinder, when the sealing plate 7 is opened, the diameter of the opening portion is not larger than the hole diameter d of the sealing plate 7.
Note that the larger the diameter of the opening of the sealing plate 7 of the gas cylinder 5, the more gas in the gas cylinder 5 is ejected.
Therefore, the gas ejection time in the gas cylinder 5 can be shortened by opening the sealing plate 7 of the gas cylinder 5 as much as possible.

On the other hand, in the technology described in the prior art (Patent Document 3) in which the piston is pressurized with explosives and the sealing plate of the gas cylinder is broken with the piston, the piston shape is “the tip of the piston is formed into a tapered shape, It is shown that the hole becomes easier and the diameter of the opening becomes larger.
In addition, when the gas cylinder sealing plate is opened by the piston, the sealing plate opens along the pin shape.
For example, as shown in FIG. 7, when the gas cylinder sealing plate is opened by the piston 100 with the tip of the pin portion 101 sharpened, as shown in FIG. A hole is formed along the shape of the portion 101.

Therefore, since the sealing plate 7 opened by the piston 100 with the tip of the pin portion 101 sharpened has a small cross-sectional diameter on the tip side of the pin portion 101, the opening portion diameter d ′ becomes small.
From the above, when it is desired to increase the diameter of the opening portion of the sealing plate, the pin portion 101 of the piston 100 has the straight shape from the tip to the end, and can open the sealing plate 7 most greatly. I understand that it will be enough.
However, as described in the prior art (Patent Document 3), when the pin portion 101 has a straight shape, depending on the setting of the sealing plate hole diameter and the pin portion diameter, as shown in FIG. If the piston 100 is sometimes misaligned, the pin portion 101 does not pierce the hole 7a of the sealing plate 7 and the piston 100 does not move. In the prior art (Patent Document 3), these dangers are not shown.

Even if the tip of the piston 100 is tapered and thin, the diameter of the tip of the pin portion and the diameter of the end of the pin portion are the same as the hole diameter of the sealing plate 7. When the deviation occurs, the piston 100 may not move.
Further, in the prior art (Patent Document 3), since “the outer diameter of the piston is set smaller than the inner diameter of the cylinder chamber”, misalignment particularly occurs when the piston moves. In addition, when the diameter of a pin part is made thin so that the influence of center shift | offset | difference may become small, the sealing plate opening part diameter after pin movement becomes small.
Therefore, a contradiction arises with the content that the diameter of the aperture is increased.

On the other hand, when the piston 30 of the gas cylinder opening device 10 of the present embodiment comes into contact with the sealing plate 7 of the gas cylinder 5 and the pin portion 32 that opens the sealing plate 7 of the gas cylinder 5 and enters the gas cylinder 5. A head portion 33 for terminating the intrusion of the pin portion 32 and an O-ring mounting portion 35 for attaching the O-ring 38 are provided. By mounting the O-ring 38 on the piston 30, displacement of the piston 30 before operation is prevented. Moreover, the inclination of the piston 30 can be prevented when the piston 30 moves.
Therefore, in the gas cylinder opening device 10 of the present embodiment, the misalignment of the piston 30 is unlikely to occur.

Next, the shape of the pin part 32 is demonstrated.
First, the pin part 32 makes the front-end | tip 32a flat or spherical as shown in FIG. 10, FIG. 11, and gives the angle of 19 degrees-130 degrees to the front-end | tip side of the pin part 32. FIG.
First, the entire length of the piston 30 is shortened by flattening the tip 32a of the pin portion 32. Therefore, it leads to size reduction of the gas cylinder opening apparatus 10 whole.
Further, by flattening the tip 32a of the pin portion 32, there is a possibility that the sealing plate 7 of the gas cylinder 5 may be damaged even if the piston 30 moves due to vibration, compared to the case where the tip 32a of the pin portion 32 is sharpened. Can be reduced.
From the viewpoint of not damaging the sealing plate 7 due to vibration, the tip 32a of the pin portion 32 is not limited to being flat but may be spherical.

Secondly, for example, for the gas cylinder 5 having a hole diameter of 3.5 mm at the maximum in the sealing plate 7, the end diameter of the pin portion 32 is set to 3 mm, and an angle of at least 19 ° is provided, so that the tip end of the pin portion 32 is provided. The diameter of 32a is 2.5 mm which is 1 mm smaller than the hole diameter of the sealing plate 7 when the length of the pin portion 32 is short (for example, about 3 mm in FIG. 10).
Therefore, since the diameter of the tip 32 a of the pin portion 32 is smaller than the hole diameter of the sealing plate 7 of the gas cylinder 5, the tip 32 a of the pin portion 32 is kept in the sealing plate 7 of the gas cylinder 5 even if the center of the piston 30 is displaced. Bite.

Further, since the tip 32a of the pin portion 32 is inclined, the misalignment of the piston 30 is corrected as the piston 30 enters.
Moreover, as shown in FIG. 11, when the terminal diameter of the pin part 32 is 7 mm, the angle of 130 degrees is attached at maximum. If the angle is 130 °, the tip 32a of the pin portion 32 has a flat shape, and damage to the sealing plate 7 of the gas cylinder 5 due to vibration can be reduced.
Next, as shown in FIGS. 12 and 13, the pin portion 32 makes the tip 32 a flat or spherical, and forms an angle of 10 ° to 95 ° from the tip 32 a side to the terminal end of the pin portion 32.
Even when the angle is set within the range of 10 ° to 95 ° not only from the tip 32a side of the pin portion 32 but also from the tip 32a side to the end portion of the pin portion 32, the misalignment when moving the piston 30 is corrected. it can.

For example, for the gas cylinder 5 having a hole diameter of 3.5 mm at the maximum in the sealing plate 7, the end diameter of the pin portion 32 is set to 3 mm, and an angle of at least 10 ° is provided so that the diameter of the tip 32 a of the pin portion 32 is When the length of the pin portion 32 is shorter (for example, about 3 mm in FIG. 12), it becomes 2.5 mm which is 1 mm smaller than the sealing plate hole diameter.
Further, when the terminal diameter of the pin portion 32 is 7 mm, the tip 32a of the pin portion 32 becomes a flat shape by attaching an angle of 95 ° at the maximum as shown in FIG.
Further, in this case, not only the tip 32a side of the pin portion 32 but also the entire pin portion 32 has an inclination, so that the misalignment correcting function works more.

However, when an angle is given to the entire pin portion 32, the piston 30 is increased as the angle applied to the entire pin portion 32 is increased in consideration of misalignment correction and shortening the length of the pin portion 32. The diameter of the opening of the sealing plate 7 after the movement becomes small.
For example, under the condition that the length of the pin portion 32 is not changed, as shown in FIG. 14, when the terminal diameter of the pin portion 32 is 3 mm and the angle is 10 °, as shown in FIG. In the case where the end diameter is 3 mm and the angle is 40 °, the inclination of the pin portion 32 becomes tighter when the angle is 40 °, and the misalignment is further corrected.
However, since the cross-sectional diameter of the pin part 32 becomes small, the opening part diameter of the sealing board 7 also becomes small.

Next, the pin part 32 has a flat or spherical tip 32a, an angle of 19 ° to 130 ° from the tip 32a side of the pin part 32, and the tip of the pin part 32 from the middle to the terminal part of the pin part 32. An angle smaller than the angle provided on the 32a side is applied.
When it is desired to balance the misalignment correction of the piston 30 and increase the opening of the sealing plate 7, an angle of 19 ° to 130 ° is provided from the tip 32 a side of the pin portion 32 and the end of the pin portion 32 is terminated from the middle. It is effective to use the piston 30 with an angle smaller than the angle provided on the tip 32a side of the pin portion 32 over the portion.
For example, for the gas cylinder 5 having a maximum hole diameter of 3.5 mm in the sealing plate 7, as shown in FIG. 16, the terminal diameter of the pin portion 32 is set to 3 mm, and an angle of at least 19 ° is given from the tip side.
Further, an inclination of an angle of 15 °, which is smaller than the angle of 19 ° on the tip 32a side of the pin portion 32, is given from the middle to the end portion of the pin portion 32.

Further, for example, as shown in FIG. 17, the end diameter of the pin portion 32 is 7 mm, an angle of 130 ° is given from the tip 32a side of the pin portion 32, and the tip side angle is from the middle of the pin portion 32 to the end portion. An inclination of an angle of 10 ° smaller than 130 ° is provided.
In these cases, the misalignment of the piston 30 is corrected by the inclination of the pin portion 32 on the tip 32a side, and an angle smaller than the angle provided on the tip 32a side of the pin portion 32 is given from the middle of the pin portion 32. The inclination on the terminal side of the pin portion 32 becomes loose. Therefore, the diameter on the terminal side of the pin part 32 is larger than the diameter on the tip 32a side of the pin part 32. Therefore, the opening portion of the sealing plate 7 after the piston 30 has entered can be made larger.
In addition, since the terminal side of the pin part 32 is also inclined, the terminal side of the pin part 32 is more advantageous than the straight shape for correcting misalignment.

Next, the stability of the gas ejection time will be described.
First, in the prior art (Patent Document 3) described in the technology of pressurizing a piston with explosives and breaking the gas cylinder sealing plate with the piston, “in order to make the return of the piston after movement smooth, an orifice is provided in the piston, The explosive pressure after activation of the initiator is released through the orifice through the orifice, or the outer diameter of the piston is set smaller than the inner diameter of the cylinder chamber. The gas inside is stably ejected.
However, as described above, if an orifice is provided in the piston as described above, or if the clearance between the cylinder chamber and the piston is increased, the pressure during operation of the detonator leaks from the orifice and clearance, so the piston can be efficiently Cannot pressurize.
In contrast, the gas cylinder opening device 10 of the present embodiment has a mechanism in which an O-ring 38 is attached to the piston 30 and a gas vent hole 26 is provided in the holder 21 so as to release the residual pressure.

Furthermore, the prior art (Patent Document 3) describes that a spring is interposed between the piston and the gas cylinder to make the return of the piston smoother.
On the other hand, the return state of the piston also changes depending on the state of solid residue generation after chemical combustion.
In other words, even if the explosion pressure of the detonator is released, if solid residue adheres around the piston, the solid residue adhering to the piston and the cylinder chamber bite, and the piston does not return to its original position.
In this case, even if a spring is interposed between the piston and the gas cylinder, since the piston is fixed, it is difficult to return the moved piston.
In a situation where the piston does not return, the gas in the gas cylinder is ejected only from a slight gap between the broken sealing plate and the pin portion, so that the gas ejection time becomes longer, or the sealing plate opening portion is completely blocked by the pin portion. Therefore, an event that the gas in the gas cylinder is not ejected occurs, and the gas ejection time becomes unstable.

In contrast, the gas cylinder opening device 10 of the present embodiment has grooves 34 in the pin portion 32 and the head portion 33 so that the gas in the gas cylinder 5 is stably ejected even if the piston 30 does not return. The pin portion 32 and the groove 34 of the head portion 33 communicate with each other.
Therefore, in the gas cylinder opening device 10 of the present embodiment, as shown in FIG. 3, the piston 30 terminates the intrusion of the piston 30 when the end surface of the head portion 33 and the sealing plate 7 of the gas cylinder 5 come into contact. Even if is not restored, the gas in the gas cylinder 5 flows through the groove 34 of the pin portion 32 and the head portion 33.
If the head portion 33 is not provided, even if the groove 34 is provided in the pin portion 32, the gas in the gas cylinder 5 does not flow when the entire pin portion 32 is stuck in the sealing plate 7 and enters the gas cylinder 5.

By setting the diameter of the head portion 33 to be larger than the hole diameter of the sealing plate 7, the intrusion of the piston 30 is terminated when the head portion 33 and the sealing plate 7 come into contact with each other. The gas in the gas cylinder 5 flows from the groove portion 34 of the pin portion 32 that has entered the gas cylinder 5 through the groove 34 of the head portion 33. That is, the gas ejection passage in the gas cylinder 5 can be secured without the piston 30 returning.
After the movement of the piston 30, the gas in the gas cylinder 5 is ejected from the gas discharge hole 24 of the holder 21 by the communication between the groove 34 of the head portion 33 and the gas discharge hole 24 of the holder 21.
Therefore, the gas discharge hole 24 provided in the holder 21 is provided at a position communicating with the groove 34 provided in the head portion 33 of the piston 30 after the movement in one place up and down, left and right or symmetrically with respect to the axis of the holder 21. In addition, as a diameter, 3.0 mm or more is desirable.

Even when the piston 30 does not return, the amount of gas ejection from the gas cylinder 5 increases as the opening diameter of the sealing plate 7 of the gas cylinder 5 increases.
The sealing plate 7 of the gas cylinder 5 is pierced along the shape of the pin portion 32, but when the pin portion 32 enters the sealing plate 7 as the diameter of the pin portion 32 increases, the pin portion with respect to the broken sealing plate 7 Large distortion is applied to the side surface.
Therefore, as shown in FIGS. 18A to 18C, the larger the diameter of the pin portion 32, the larger the diameter of the opening 7 ′ of the sealing plate 7, and the broken sealing plate 7 is cracked. Will occur.
As the diameter of the aperture 7 ′ increases, the cracks in the sealing plate 7 also increase. As the crack of the broken sealing plate 7 increases, the gap between the pin portion 32 and the broken sealing plate 7 increases, so that even if the piston 30 does not return, the gas ejection flow path in the gas cylinder 5 increases. Become.

From the above, the piston 30 according to the present embodiment can be provided within the gas cylinder 5 by setting the angle so that the diameter of the opening 7 ′ is as large as possible when the angle of the pin portion 32 is provided to prevent misalignment. The gas ejection time can be adjusted to be faster.
In addition, the piston 30 is also provided with a groove 34.
In addition, the groove part 34 can be set within the range which can be processed into the piston 30.
For example, as shown in FIG. 19, the angle of the pin portion 32 and the diameter of the head portion 33 are determined with respect to the diameter of the sealing plate 7 of the gas cylinder 5 for each type, and the diameter ymm is set on the axis above the diameter xmm. The grooves can be taken at an angle Z ° with a workable dimension.

The diameter x, the diameter y, and the angle Z ° can be arbitrarily changed according to the dimensions of the pin portion 32 and the head portion 33.
There are cases where the angle Z ° is 90 ° and four grooves 34 are provided, or the angle Z ° is 120 ° and three grooves 34 are provided.
Further, regarding the groove 34, an example of a circular shape has been shown in consideration of workability, but an arbitrary shape such as a square shape may be used regardless of the circular shape.
In any case, if the groove 34 is set to be as large as possible, the gas ejection time in the gas cylinder 5 becomes faster.

Secondly, an example in which the pin portion 32 is threaded and the groove 34 is provided in the head portion 33 will be described.
As shown in FIGS. 20 and 21, the piston 30 in which the pin portion 32 is threaded and the groove 34 is provided in the head portion 33 can also be discharged from the gas cylinder 5 even if the piston 30 does not return after moving the piston 30. A road can be formed.
The head portion 33 terminates the intrusion of the piston 30 when the sealing plate 7 comes into contact, and the gas in the gas cylinder 5 passes through the groove 34 of the head portion 33 from the threaded portion of the pin portion 32 that has entered the gas cylinder 5. Flowing.
That is, the gas ejection flow path in the gas cylinder 5 can be secured without the piston 30 returning.
The screw thread can be arbitrarily set within the dimensions that can be machined in the pin portion 32. If the gas ejection flow path is set to the maximum as much as possible, the gas ejection time in the gas cylinder 5 can be further increased. Get faster.

Third, a hollow hole 32 b is provided in the pin portion 32, the head portion 33 is provided with a through hole 33 a in a direction perpendicular to the hollow hole 32 b of the pin portion 32, and the hollow hole 32 b of the pin portion 32 and the through hole 33 a of the head portion 33. To communicate.
In the prior art (Patent Document 4), an embodiment using a needle provided with a slit in a hollow needle is given as a mechanical cylinder opening method.
When the piston of this shape is pressurized with the gas during chemical combustion and the cylinder sealing plate is opened, pressure leakage occurs from the hollow portion.
In the case of a hollow needle, if the piston does not return after opening the gas cylinder, the gas in the gas cylinder is released to the gas generator side.

On the other hand, as shown in FIGS. 22 and 23, the piston 30 of the present embodiment is provided with a hollow hole 32 b in the pin portion 32, and the head portion 33 has a through hole in a direction perpendicular to the hollow hole 32 b of the pin portion 32. 33a is provided so that the hollow hole 32b of the pin portion 32 and the through hole 33a of the head portion 33 are communicated with each other.
By providing a hollow hole 32b in the pin portion 32 and providing a through hole 33a in the direction perpendicular to the hollow hole 32b of the pin portion 32 in the head portion 33, no through hole is generated in the O-ring mounting portion 35 of the piston 30. The piston 30 is pressurized without causing a pressure leak by the gas during the chemical combustion.
Further, the head portion 33 terminates the intrusion of the piston 30 when the sealing plate 7 comes into contact, and the gas in the gas cylinder 5 passes from the hollow hole 32b of the pin portion 32 that has entered the gas cylinder 5 to the through hole 33a of the head portion 33. Flows through. That is, even if the piston 30 does not return, the gas ejection flow path in the gas cylinder 5 can be secured.

In addition, the setting of the hole diameter of the hollow hole 32b of the pin part 32 can be arbitrarily provided within the dimension which can be processed into the pin part 32.
In addition, the through hole 33a of the head portion 33 can be set arbitrarily so that the diameter of the through hole 33a is within a dimension that can be processed in the head portion 33. The number of holes is not limited to one, and the head portion 33 It is possible to provide several through-holes 33a so as to intersect within a range that can be processed.
Even when the hollow hole 32b and the through hole 33a are set, the gas ejection time in the gas cylinder 5 becomes faster if the gas ejection flow path is set to the maximum as much as possible.

Next, the shape of the piston 30 when the head portion 33 is not provided will be described.
First, the piston 30 in which the terminal diameter of the pin portion 32 is set to be equal to or larger than the hole diameter of the sealing plate 7 of the gas cylinder 5 will be described.
24 shows an example in which grooves 34 are formed on the pin portion 32, FIG. 25 shows an example in which the pin portion 32 is threaded to form a spiral portion 32c, and FIG. An example in which a hollow hole 32d and a through hole 32e are formed is shown.
By setting the terminal diameter of the pin portion 32 to be equal to or larger than the hole diameter of the sealing plate 7, the intrusion of the piston 30 ends when the position of the cross-sectional diameter of the pin portion 32 equal to or larger than the hole diameter of the sealing plate 7 is reached. .
Even in this case, the groove 34 and the spiral portion 32 c provided in the pin portion 32 are provided up to the end portion of the pin portion 32.

Further, when the pin portion 32 is provided with the hollow hole 32d and the through hole 32e, the hollow hole 32d is first provided to the position where the gas cylinder 5 enters, and the position exposed to the outside of the gas cylinder 5 to the position where the gas cylinder 5 enters. A hollow hole 32e is provided in a direction perpendicular to the provided hollow hole 32d, and the hollow holes 32d and 32e are communicated with each other.
By setting the terminal diameter of the pin portion 32 to be equal to or larger than the hole diameter of the sealing plate 7, the penetration of the piston 30 ends in the middle of the pin portion 32 as shown in FIG.

Next, the piston 30 in which the terminal diameter of the pin portion 32 is set to be equal to or smaller than the hole diameter of the sealing plate 7 of the gas cylinder 5 and the wall portion 36 of the O-ring mounting portion 35 is set to be larger than the hole diameter of the sealing plate 7 will be described.
By setting the terminal diameter of the pin part 32 to be equal to or smaller than the hole diameter of the sealing plate 7 of the gas cylinder 5, the pin part 32 completely penetrates into the gas cylinder 5 as shown in FIG. By setting the portion 36 to be equal to or larger than the hole diameter of the sealing plate 7, the intrusion of the piston 30 ends when the sealing plate 7 of the gas cylinder 5 and the wall portion 36 of the O-ring mounting portion 35 contact each other.
In this case, as shown in FIG. 29, a groove 34 is processed in the pin portion 32, and a notch portion 36a is provided in the wall portion 36 of the O-ring mounting portion 35. Alternatively, as shown in FIG. 31, by providing a hollow hole 32 f and a through hole 36 b from the pin portion 32 to the wall portion 36, a gas ejection channel in the gas cylinder 5 is formed.

For example, when providing the groove 34 in the pin part 32, as shown in FIG. 29, the notch part 36a is provided in the wall part 36 of the O-ring mounting part 35 so as to communicate with the groove 34 provided in the pin part 32.
For example, as shown in FIG. 30, when the pin portion 32 is threaded to form the spiral portion 32 c, the wall portion of the O-ring mounting portion 35 is in communication with the spiral portion 32 c of the pin portion 32. 36 is provided with a notch 36a.
On the other hand, as shown in FIG. 31, when a hollow hole 32f is provided in the pin portion 32, a through hole 36b is provided in the wall portion 36 of the O-ring mounting portion 35 in a direction perpendicular to the hollow hole 32f of the pin portion 32, The hollow hole 32f and the through hole 36b are configured to communicate with each other.

With the above structure, even if the wall portion 36 of the O-ring mounting portion 35 closes the sealing plate 7 of the gas cylinder 5, the gas in the gas cylinder 5 can be ejected.
In addition, about the shape of the notch part 36a, it can set in the range which can be processed regardless of circular and square shape.
In addition to the notch shape, as shown in FIG. 32, a process may be performed in which a groove 36c is provided in the wall portion 36 of the O-ring mounting portion 35.
The method of providing the groove 36c in the O-ring mounting portion 35 can be any shape as long as it can be processed.

(Experimental example)
In the prior art, by making the outer diameter of the piston 30 smaller than the piston guide hole 25 of the holder 21, the pressure of the gas generating agent 44 is ejected from the gas discharge hole 24 of the holder 21, and the return of the piston 30 is considered to be smooth. (From the idea that the piston is difficult to return when the gas of the gas generant is accumulated).
Therefore, as shown in FIG. 33, first, as shown in FIG. 33, the stainless steel holder 21A in which the diameter of the piston guide hole 25 is not provided and the piston guide hole 25 is 6 mm, and the outer diameter of the piston 30A is not provided with the O-ring mounting portion 35. The operation of the gas cylinder opening device 10A with 5.8 mm was confirmed.
The diameter of the gas discharge hole 24 of the holder 21A is 3 mm (all the subsequent tests, the diameter of the gas discharge hole 24 of the holder 21A is 3 mm).

The gas cylinder 5 used in the test is a mini gas cartridge (model: LS20-1-16 g) manufactured by Nippon Carbon Gas Co., Ltd., and about 16 g of liquefied CO ₂ gas is filled in the gas cylinder (all subsequent tests). The same gas cylinder is used.
The outline of the gas cylinder is as follows.
Product Name: mini gas cartridge, Studio: Japan carbonate gas Co., Ltd., model number: LS20-1-16g, CO ₂ mass: 16.0 ± 1.0g, Fuban thickness: 0.23 ± 0.05mm
Since the maximum hole diameter of the sealing plate 7 of the gas cylinder 5 is 3.5 mm, the opening diameter of the sealing plate 7 is 3.5 mm at the maximum.

Therefore, as shown in FIG. 35, the pin portion 32 of the stainless steel piston 30A is set at an angle of 46 ° from the front end to the end of the pin portion 32 so that the pin portion 32 is stuck in the sealing plate 7 even if the center deviation occurs. Then, the piston 30A having a sharp tip end and a terminal end diameter of 3 mm was used.
In addition, the non-explosive gas generating agent at the time of a test was implemented about two levels, the dosage 0.1g and the dosage 0.2g. However, the amount of the ignition charge is fixed at 0.15 g (all the subsequent tests, the amount of the ignition charge is 0.15 g).
The sheet 29 is made of a polyester resin and has an outer diameter of 5.5 mm and a thickness of 0.3 mm.

(1) Confirmation method As confirmation items, the piston return status after the operation of the device, the CO ₂ gas ejection time, and the diameter of the opening of the sealing plate 7 of the gas cylinder 5 were measured.
The CO ₂ gas jetting time was measured from the video shot with a video camera from the gas jetting start to the jetting end.
Further, the sealing plate 7 of the gas cylinder 5 is opened along the pin shape, and the diameter of the opening portion of the sealing plate 7 is different between the front end side and the terminal end side of the pin portion 32, but in this test, the front end side ( The diameter of the opening of the gas cylinder 5) was measured with a microscope VHX-100 manufactured by Keyence Corporation.

(2) Confirmation results Table 3 shows the operation confirmation results.

In this test, the pin portion 32 of the piston 30 </ b> A was not completely invaded into the gas cylinder 5.
However, since the pin portion 32 slightly penetrated into the gas cylinder 5, the sealing plate 7 of the gas cylinder 5 was opened with both the doses of 0.1 g and 0.2 g. Moreover, since the pin part 32 penetrate | invaded deeply into the gas cylinder 5 when the chemical | drug | medicine amount was large, the opening part diameter of the sealing board 7 became large. After the sealing hole of the sealing plate 7, the piston 30 </ b> A did not return, and the pin portion 32 blocked the opening portion of the sealing plate 7, resulting in no CO ₂ gas being ejected.
Therefore, even if the outer diameter of the piston 30A is made smaller than the piston guide hole 25 and the residual pressure is released, it can be said that the piston 30A does not return.

The return of the piston 30A can be predicted not only to accumulate the gas pressure but also to create a situation in which the solid residue generated after the combustion of the gas generating agent adheres to the outer peripheral portion of the piston 30A and is difficult to return.
From the above results, there is no effect in reducing the outer diameter of the piston 30A from the piston guide hole 25 of the holder 21A. Rather, the pressure acting on the piston 30A during gas generating agent combustion leaks from the clearance, so that the piston 30A The demerit that the pressing pressure decreases is considered to be greater.

Next, as a countermeasure against pressure leakage, as shown in FIGS. 36 and 37, a gas cylinder opening device in which an O-ring mounting portion 35 is provided in the piston 30A and a piston 30B in which an O-ring 38 of size S4 is mounted is used. The operating status of 10A was confirmed.
The only part that differs between this test and the above test is the piston.
For the piston 30B equipped with the O-ring 38, the amount of gas generating agent is set to 0.2 g, the pin return state after the operation of the apparatus, the CO ₂ gas ejection time, and the diameter of the opening of the sealing plate 7 of the gas cylinder 5 are measured. Carried out.
In the test, N = 2 was confirmed.
Table 4 shows the operation confirmation results.

By mounting the O-ring 38, the pin portion 32 of the piston 30B completely entered the gas cylinder 5, and the diameter of the opening portion of the sealing plate 7 was increased.
The force F required to open the sealing plate 7 of the gas cylinder 5 with a diameter of 1.6 mm is based on the calculation formula of punching force (F = 2π × punching radius r × sealing plate thickness t × sealing plate material shear resistance τ). 31.5kgf is obtained.
Therefore, the pressure P applied to the piston 30B required to open the sealing plate 7 of the gas cylinder 5 by 1.6 mm is the pressure F required to open the sealing plate 7 of the gas cylinder 5 by the pressure receiving area of the piston 30B. By dividing, it becomes 119.3 (kgf / cm ² ).
The gas generating agent dose required to generate the pressure of 119.3 (kgf / cm ² ) is sufficient if it takes into account the volume of the piston guide hole 25 of the holder 21A and is at least 0.1 g. .

On the other hand, when the O-ring 38 is not attached to the piston 30B, the pin portion 32 of the piston 30B does not completely enter the gas cylinder 5 even if the gas generating agent amount is 0.2 g, and the diameter of the opening portion of the sealing plate 7 Became smaller.
On the other hand, when the O-ring 38 is attached to the piston 30B, the pin portion 32 of the piston 30B completely enters the gas cylinder 5, and an appropriate value is obtained as the opening portion diameter of the sealing plate 7.
Therefore, when the O-ring 38 is not attached to the piston 30B, it can be determined that a pressure leak has occurred from the clearance portion between the piston guide hole 25 of the holder 21A and the piston 30B.
From the above, by attaching the O-ring 38, pressure leakage was prevented and the pressure pushing the piston 30B was improved.
In this test, the piston 30B did not return after operation, but a case where CO ₂ gas was ejected was observed.

Here, as a result of disassembling the gas cylinder 5 in which the CO ₂ gas was ejected and observing the state of the sealing plate 7, the characteristics such as “a crack occurred in the broken sealing plate” could be confirmed.
Compared to the condition in which the O-ring 38 is not attached and the pin portion 32 only slightly enters the gas cylinder 5, the pin portion 32 completely enters the gas cylinder 5 during this test, so that the pin portion 32 enters the gas cylinder 5. The cross-sectional diameter of the pin part 32 becomes large. Therefore, when the pin portion 32 enters the sealing plate 7, the fractured sealing plate 7 is further subjected to strain on the side surface side of the pin, and the diameter of the opening portion of the sealing plate 7 increases and the fractured sealing plate Cracked.
Due to the above action, the fractured seal plate 7 was cracked, so that a gap was formed between the pin portion 32 and the fractured seal plate 7, and a CO ₂ gas ejection channel was formed.

Next, confirmation of the effect of the piston shape will be described.
From the results up to this point, if the diameter of the opening portion of the sealing plate 7 is increased, the sealing plate 7 is greatly cracked, and the CO ₂ gas ejection channel is formed through the gap between the pin portion 32 and the broken sealing plate 7. Is secured.
Further, the sealing plate 7 is opened along a pin shape.
Therefore, the larger the diameter of the pin portion 32, the larger the diameter of the opening portion of the sealing plate 7, and more cracks are generated in the broken sealing plate 7, which is advantageous for the ejection of CO ₂ gas.
However, in order to increase the diameter of the pin portion 32, when the tip end side of the pin portion 32 is not sharpened and is formed in a straight shape from the tip end portion to the terminal end portion, the hole diameter of the sealing plate 7 and the pin portion 32 are set. Depending on the setting of the diameter, when a misalignment occurs during the movement of the piston, the pin portion 32 does not pierce the hole of the sealing plate 7 and the piston does not move.

For this problem, “make a certain angle on the pin tip side” or “make a certain angle for the entire pin part from the pin tip side to the terminal end” or “a certain angle from the pin tip side” And an angle smaller than the angle provided on the pin tip side from the middle of the pin portion to the end portion is given, whereby the misalignment of the piston can be corrected. In addition, when setting the angle, it is possible to increase the diameter of the sealing plate opening by setting the pin part diameter to be large.
Even if the piston does not return, if a CO ₂ gas injection passage is formed from the piston to the gas discharge hole 24 of the holder 21A, CO ₂ gas is injected regardless of the return of the piston.
Operation confirmation was carried out for the following two types of pistons A and B as pin shapes that can achieve the above effects.

As shown in FIGS. 38 and 39, the piston A has a flat tip at the tip of the pin portion 32, the end portion diameter of the pin portion 32 is 3 mm, and an angle of 37 ° is given from the tip portion to the end portion of the pin portion 32. Further, a head portion 33 was provided, and grooves 34 communicating from the terminal end of the pin portion 32 to the head portion 33 were provided every 90 °.
In the piston B, as shown in FIGS. 40 and 41, the tip of the pin portion 32 has a flat shape, the end diameter of the pin portion 32 is 3 mm, and an angle of 90 ° from the tip of the pin portion 32 is provided. An angle of 23 ° is provided from the middle of the portion 32 to the terminal portion of the pin portion 32, a head portion 33 is further provided, and a groove 34 communicating from the tip of the pin portion 32 to the head portion 33 is provided every 90 °.
In the two types of pistons A and B, the tip of the pin portion 32 has a flat shape.

By flattening the tip of the pin portion 32, the entire length of the pin portion 32 is shortened, leading to downsizing of the pistons A and B, and finally downsizing of the gas cylinder opening device.
Further, the risk of damaging the sealing plate 7 of the gas cylinder 5 due to vibration or impact can be reduced.
Since the tip diameter of the pin portion 32 is 1 mm and is smaller than the maximum hole diameter of 3.5 mm of the sealing plate 7 of the gas cylinder 5, the tip of the pin section 32 is sealed with the gas cylinder 5 even if misalignment occurs during piston movement. It stabs the board 7.
Further, since the tip of the pin portion 32 is inclined, the piston misalignment is corrected as the pistons A and B progress.
The piston B has a smaller angle on the terminal side of the pin portion 32 than the piston A.
Therefore, in the piston B, the diameter of the opening portion of the sealing plate 7 of the gas cylinder 5 is increased by increasing the cross-sectional diameter of the pin portion 32 that enters the gas cylinder 5.

Further, the two types of pistons A and B are provided with a groove 34 from the pin portion 32 to the head portion 33.
The dimensions of the groove 34 are the same as the dimensions of the groove portion shown in FIG. 19, and both the pistons A and B are provided with four grooves having a diameter y = 2 mm on the shaft on the diameter x = 4 mm at intervals of an angle Z = 90 °. Yes.
The head portion 33 provided on the pistons A and B terminates the intrusion of the pin portion 32 when it comes into contact with the sealing plate 7, and the groove 34 of the head portion 33 and the pin portion 32 communicates with each other. A flow path of CO ₂ gas can be secured from the groove 34 of the pin portion 32 that has entered into the groove 34 of the head portion 33.
After the piston movement, the groove 34 of the head portion 33 and the gas discharge hole 24 of the holder 21A are communicated, and CO ₂ gas is ejected from the gas discharge hole 24 of the holder 21A.

Further, the two types of pistons A and B have a structure in which an O-ring 38 is attached.
As already described, by attaching the O-ring 38 to the pistons A and B, pressure leakage during combustion of the non-explosive gas generating agent is prevented, and the pressure for pushing the piston is improved.
However, when the O-ring 38 is provided, there arises a situation in which the residual pressure of the non-explosive gas generating agent is not released after the piston moves.
Therefore, as shown in FIG. 1, FIG. 2, and FIG. 5, the holder 21 has a vent hole with a hole diameter of 1.0 mm at the position just behind the O-ring 38 after the piston movement, so as to release the residual pressure after the piston movement. 26 was provided.

(1) Confirmation of operation Using the holder 21 provided with the gas vent hole 26, the operation of the device in which the pistons A and B were arranged was confirmed.
The confirmation items are the piston return status after the operation of the apparatus, the measurement of the diameter (mm) of the opening of the sealing plate 7 of the gas cylinder 5, and the ejection time (ms) of the CO ₂ gas.
The diameter of the hole in the sealing plate 7 is measured with a microscope VHX-100 manufactured by Keyence Corporation as the diameter of the hole at the tip of the pin (in the gas cylinder).
The CO ₂ gas jetting time was measured from the video shot with a high-speed camera from the gas jetting start to the jetting end.
The amount of gas generating agent was set to two levels of 0.1 g and 0.2 g, and N = 3 was measured for each level.

(2) Confirmation results Table 5 shows the measurement results.

In all the test samples, the pin portions 32 of the pistons A and B completely penetrated into the gas cylinder 5.
When the gas generating agent dose is 0.2 g, the sheet 29 disposed between the tip of the pin portion 32 and the gas cylinder 5 is crushed more than when the gas generating agent dose is 0.1 g. A result of deeper penetration into the gas cylinder 5 and an increase in the diameter of the opening of the sealing plate 7 was also obtained.
It was also confirmed that when the gas generating agent dose was 0.1 g, the piston 30 returned and the gas ejection time was shortened.
Compared with the previous tests, the hole diameter of the sealing plate 7 was increased during the test, so that the gas in the gas cylinder 5 works strongly in the direction of returning the piston 30 and the piston 30 is restored. It is thought that it became.
However, if the amount of gas generating agent is increased, the amount of residue after combustion also increases, so the piston 30 does not return.

The opening diameter of the sealing plate 7 between the piston A and the piston B was a result of the piston B having a larger opening diameter.
Therefore, it was proved that the sealing plate 7 can be opened more greatly by reducing the angle of the terminal end side of the pin portion 32.
Further, from the result of the gas generating agent dose amount of 0.2 g of the piston A and the piston B, it was confirmed that the gas ejection time in the gas cylinder 5 was stable even if the piston 30 did not return.
As described above, even if the piston 30 does not return, if a CO ₂ gas injection flow path is formed from the piston 30 to the gas discharge hole 24 of the holder 21, CO ₂ gas is injected regardless of the return of the piston 30.

The piston B has a faster gas ejection time.
The reason for this is that the piston B has a smaller angle on the terminal end side of the pin portion 32, the diameter of the opening portion of the sealing plate 7 is larger, and the cracked sealing plate 7 has more cracks. In addition to the groove 34, the gap between the broken sealing plate 7 and the pin portion 32 is increased, and the CO ₂ gas ejection flow path is increased.
Therefore, when the pin 30 is provided with an angle for correcting misalignment, the piston 30 is set to an angle so that the diameter of the hole is as large as possible, and the piston 30 is ejected in a range that can be processed from the pin portion 32 to the head portion 33. By setting the flow path to be large, the gas ejection time in the gas cylinder 5 can be adjusted to be faster even if the piston 30 does not return.

DESCRIPTION OF SYMBOLS 1 Expansion unit 2 Opening part 3 Plate 4 Washer 5 Gas cylinder 6 Mouth part 7 Sealing plate 10 Gas cylinder opening apparatus 20 Gas cylinder opening device 21 Holder 22 Gas cylinder attachment hole 23 Gas generator attachment hole 24 Gas discharge hole 25 Piston guide hole 26 Gas Punching hole 29 Sheet 30 Piston 32 Pin part 32a Tip 32b, 32d, 32f of pin part 32 Hollow hole 32c Spiral part 32e, 33a, 36b Through hole 33 Head part 34, 36c Groove 35 O-ring mounting part 36, 37 Wall part 36a Notch 38 O-ring 40 Gas generator 40a Gas generator 41 Holder 43 Tube 44 Gas generating agent 45 Cap 46 Ignition agent 47 Ignition agent 48 Plug with wire bridge 49 Electric bridge wire 50 Sealant

Claims (15)

A gas cylinder opening for opening a sealing plate provided at the mouth of a gas cylinder arranged in a deployable expansion unit that seals the opening with a sealing part, and for discharging the gas in the gas cylinder to expand the expansion unit In the device
An opening device that is attached to the sealing part, attaches the opening of the gas cylinder, opens the sealing plate of the gas cylinder, and ejects the gas in the gas cylinder into the expansion unit;
A sheet disposed on the front surface of the sealing plate of the gas cylinder mounted on the aperture;
A gas generator that is mounted on the opener facing the mouth of the gas cylinder and generates a gas pressure by combustion of a gas generating agent comprising a non-explosive composition part;
A piston disposed between the sheet and the gas generator in the aperture, and opening the sealing plate by a gas pressure of the gas generator;
The opening device includes a mounting portion to be mounted on the blocking portion, a gas cylinder mounting portion for mounting a mouth portion of the gas cylinder, a piston guide hole for arranging the piston, and a gas generator for mounting the gas generator. A mounting portion; a gas discharge hole communicating with the piston guide hole; and a gas vent hole communicating with the piston guide hole and spaced apart from the gas discharge hole.
The piston includes a gas ejection channel, and includes a pin portion that opens the sealing plate, and an O-ring mounting portion that mounts an O-ring that is in close contact with the inner wall of the piston guide hole,
Before the operation of the gas generator, the pin of the piston is located on the front surface of the seat, and the O-ring mounting part is located on the gas generator side from the gas vent hole,
After the operation of the gas generator, the piston is pushed out to the mouth side of the gas cylinder by the gas pressure due to combustion of the gas generating agent, and the O-ring mounting part is on the mouth side of the gas cylinder from the gas vent The residual pressure is released from the gas vent hole, the pin portion pierces the sheet and the sealing plate and enters the mouth of the gas cylinder, and the gas is released through the gas ejection channel. A gas cylinder opening device, wherein the expansion unit is expanded by being ejected from a hole. In the gas cylinder opening device according to the invention of claim 1,
The piston includes the gas ejection flow path, and a pin portion that opens the sealing plate of the gas cylinder and enters the mouth portion of the gas cylinder, and the O-ring is attached, and when the piston contacts the sealing plate of the gas cylinder, A gas cylinder opening device, comprising: an O-ring mounting portion that terminates intrusion of the pin portion. In the gas cylinder opening device according to the invention of claim 2,
The gas jet passage device is configured by providing a groove in the longitudinal direction of the pin portion. In the gas cylinder opening device according to the invention of claim 2,
The gas ejection passage is configured by providing a groove in the longitudinal direction of the pin portion and providing a notch portion continuous with the groove in a wall portion of the O-ring mounting portion. In the gas cylinder opening device according to the invention of claim 2,
The gas jet passage device is configured by forming a spiral portion by subjecting the pin portion to threading. In the gas cylinder opening device according to the invention of claim 2,
The gas ejection flow path is configured by forming a spiral portion by threading the pin portion, and providing a notch portion continuous with the groove on the pin portion side wall portion of the O-ring mounting portion. A gas cylinder hole opening device. In the gas cylinder opening device according to the invention of claim 2,
The gas ejection flow path is configured by providing a hollow portion in the axial direction in the pin portion and providing a through hole communicating with the hollow portion in a direction perpendicular to the hollow portion. Hole device. In the gas cylinder opening device according to the invention of claim 2,
The gas ejection flow path is provided with a hollow portion in the axial direction in the pin portion, and a through hole communicating with the hollow portion in a direction perpendicular to the hollow portion is provided in a side wall portion of the pin portion of the O-ring mounting portion. A gas cylinder opening device characterized by comprising: In the gas cylinder opening device according to the invention of claim 1,
The piston includes the gas ejection flow path, and has a pin portion that opens the sealing plate of the gas cylinder and enters the gas cylinder, and a head that terminates the penetration of the pin portion when contacting the sealing plate of the gas cylinder A gas cylinder hole opening device comprising: an O-ring mounting portion for attaching the O-ring; In the gas cylinder opening device of the invention according to claim 9,
The said pin part is equipped with the inclined surface which makes a front-end | tip flat or spherical, and makes the angle of 19 degrees-130 degrees from the said front end side. The gas cylinder opening apparatus characterized by the above-mentioned. In the gas cylinder opening device of the invention according to claim 9,
The said pin part is equipped with the inclined surface which makes a front-end | tip flat or spherical, and makes the angle of 10 degrees-95 degrees from the said front end side to a termination | terminus part. The gas cylinder opening apparatus characterized by the above-mentioned. In the gas cylinder opening device of the invention according to claim 9,
The pin portion has a slope that makes the tip flat or spherical and has an angle of 19 ° to 130 ° from the tip side, and has an angle smaller than the angle provided on the tip side from the middle of the pin portion to the terminal portion. A gas cylinder opening device comprising a slope. In the gas cylinder opening device of the invention according to claim 9,
The gas ejection passage is configured by providing a groove in the pin portion and the head portion and communicating the groove of the pin portion and the head portion. In the gas cylinder opening device of the invention according to claim 9,
The gas ejection flow path is formed by threading the pin portion to form a spiral portion, providing a groove in the head portion, and communicating the spiral portion and the groove. Gas cylinder opening device. In the gas cylinder opening device of the invention according to claim 9,
The gas ejection flow path has a hollow portion in the pin portion, the head portion has a through hole in a direction perpendicular to the hollow portion of the pin portion, and the hollow portion of the pin portion and the through hole of the head portion A gas cylinder opening device characterized by being configured to communicate with each other.

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