JPH067237Y2 - Gas filling valve - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a thin gas filling valve integrally formed in a hollow body, which is capable of filling gas at high speed and has little leakage of the filled gas. It is intended to be superior to.

[Prior Art] A conventionally used gas filling valve integrally formed in a hollow body such as a floating ring is a closing valve for sealing the filled gas and a reverse valve for preventing leakage of the filled gas. Since it has a double structure with a stop valve, it is thick and the closing valve projects from the surface of the hollow body. This gas filling valve is embedded in the hollow body except when filling the gas, is drawn out from the hollow body when filling the gas, and is a space created by deforming the check valve by pushing the gas filling hole from the outside. Then, the gas is applied with pressure to fill the gas, then the gas is sealed, and the gas is pushed again into the hollow body.

[Problems to be Solved by the Invention] However, in the gas filling valve having the double structure having the closing valve and the check valve as described above, the closing valve projects from the outer surface of the hollow body, and Not only is this inconvenient when used, but the two valves, the check valve and the closing valve, cannot sufficiently seal the gas, and the filling gas gradually leaks, causing a hollow body. Could not be used for a long time.

[Means for Solving the Problems] The present invention has been made to solve the above problems, in which a gas filling hole is formed in a hollow synthetic resin base material, and a gas is formed on the inner surface of the base material. A synthetic resin sealing valve member made of a flexible thin piece that closes the filling hole is provided with a thin film intermediate material having a melting point higher than those of the members between the base material and the sealing valve member. The heat sealing was applied so as to communicate with the gas filling hole and form a ventilation path communicating with the inside of the hollow body through the intermediate material, which was a means for solving the problem.

Hereinafter, the present invention will be described in detail.

1 and 2 are enlarged detail views of the gas filling valve 1 of the present invention, showing the mounting structure of the gas filling valve 1 and the hollow body 2.

The gas filling valve 1 of the present invention is integrally formed at an appropriate position on the surface of a hollow body 2 having a shape such as a floating ring.
Consists of a base material 2a of a metal laminate film obtained by vapor-depositing a metal such as aluminum on a flexible film made of a soft synthetic resin having low gas permeability such as polyester, nylon, ethylene vinyl alcohol (Eval), etc. It is colored and painted by means of printing or the like. A circular gas filling hole 3 for filling a gas into the hollow body 2 is formed at an appropriate position of the base material 2a forming the hollow body 2, and the inside portion of the base material 2a in which the gas filling hole 3 is formed is formed. A leak prevention valve 8 is attached to the.

The leak prevention valve 8 is configured by stacking the close contact valve member 4 and the sealing valve member 6 with the intermediate member 5 interposed therebetween, has a larger area than the gas filling hole 3, and The heat sealing portion 7 is attached to the inner wall of the base material 2 a forming the hollow body 2 around the filling hole 3. The close contact valve member 4 constituting the leak prevention valve 8 is a rectangular thin film in which the gas filling hole 3 and the hole 4a concentric with the gas filling hole 3 are formed.
A sealing valve member 6 that seals the gas filling hole 3 is attached via an intermediate member 5 formed of a rectangular thin film that forms a ventilation path 5a that communicates from the gas filling hole 3 into the hollow body 2. Both the close contact valve member 4 and the sealing valve member 6 are made of a flexible film made of a soft synthetic resin such as polyester, nylon, ethylene vinyl alcohol or the like having low gas permeability like the base material 2a forming the hollow body 2. In this case, polyethylene is laminated on the inner side, and they are adhered to each other by the heat seal portion 7. Further, since the intermediate member 5 forms the ventilation passage 5a communicating with the hollow body 2 through the gas filling holes 3 and 4a, the intermediate member 5 has a higher temperature than the base member 2a, the close contact valve member 4, and the sealing valve member 6. It is a thin film made of a polyester resin or the like that melts at 1, and is not heat-sealed when the leak prevention valve 8 is attached to the hollow body 2. Furthermore, each end of the three sides of the leak prevention valve 8 except one side where the intermediate member 5 is installed is also adhered to the inner wall of the hollow body 2 by the heat seal portion 7. One end of the leakage prevention valve 8 on which the intermediate member 5 is installed is not attached to the hollow body 2 and is open, and the intermediate member 5 and the open end allow the ventilation passage from the gas filling hole 3 into the hollow body 2. Is formed, and the hollow body 2 can be filled with gas.

Since the formation of the hollow body 2 and the bonding and sticking for constructing the gas filling valve 1 are all performed by means such as heat sealing to simplify the manufacturing process, a straight or circular heat sealer is used. be able to.

The hollow body 2 may be formed of a plate having a low gas permeability in addition to the flexible film described above, and the leak prevention valve 8 may include the close contact valve member 4, the sealing valve member 6, and the intermediate member 5. 4 and 5, it is constituted only by the intermediate material 5 and the sealing valve member 6, and one end of the sealing valve member 6 and a part of the sides of both ends adjacent to the sealing valve member 6 are constituted. Even if the structure is opened without heat sealing, the function and effect of the gas filling valve of the present invention is the same.

A method of filling the hollow body 2 with gas using the gas filling valve 1 described above will be described with reference to FIG.

The gas filled in the hollow body 2 is generally a gas having a specific gravity smaller than that of air such as helium, and the tip of a gas introduction pipe introduced from a gas cylinder or the like to the gas filling valve 1 formed in the skin of the hollow body 2. The nozzle made of neoprene or the like attached to the is closely contacted and filled. The gas to be filled is filled in the hollow body 2 through the air passage 5a formed between the close contact valve member 4 and the sealing valve member 6 by the intermediate material 5. When the inside of the hollow body 2 is filled with gas in this way, pressure is applied from the inside of the hollow body 2 by the gas, and the space between the contact valve member 4 and the sealing valve member 6 is pressed without any gap, Since the ventilation path 5a formed by the material 5 is blocked,
It is possible to prevent gas from leaking from inside the hollow body 2.

[Operation] The gas filling valve of the present invention comprises a synthetic resin sealing valve member made of a flexible thin piece that closes the gas filling hole on the inner surface of the base material. Is formed by arranging a thin film intermediate material having a high melting point so that one end of the intermediate material communicates with the gas filling hole, and by attaching a heat seal so as to form a ventilation path communicating with the inside of the hollow body through the intermediate material. As a result, the gas filled inside passes through the gas filling hole, the base material or the close contact valve member, and the ventilation path created by the intermediate material installed between the sealing valve member and into the hollow body. Is filled. When the gas is filled in the hollow body, an internal pressure is generated, so that the space between the base material or the close contact valve member and the sealing valve member is pressed from the inside to be in close contact with each other, and the air passage is closed. Is sealed, and leakage of the filled gas can be prevented.

As described above, when the gas filling valve of the present invention is used,
The hollow body can be filled with gas at a high speed, the leak of the filled gas is small, and the hollow body filled with the gas can be used for a long time.

[Example] Aluminum was vapor-deposited on a polyester film having a film thickness of 12 to 15 µm, and then a polyethylene film was attached,
Prepare a laminated film with a total film thickness of 25 to 28 μm, form gas filling holes with a diameter of 5 mm in this laminated film, and use a polyethylene film with a film thickness of 12 μm to form a film with a thickness of 40 mm.
A rectangular close contact valve member having a size of 80 mm and a sealing valve member were manufactured. An intermediate material made of a polyester film having a film thickness of 12 μm is sandwiched between the close contact valve member and the sealing valve member, and these are laminated to each other as a leak preventive valve, and a heat sealer is used to apply a heat seal to the polyethylene film side of the laminated film. Then, the gas filling valve of the present invention was formed.
Next, the laminated film and the laminated film having the gas filling valve were heat-sealed with a circular heat sealer so that the polyethylene film side was inside, and a hollow body was made into a bag.

Helium gas 5 using a gas filling nozzle made of neoprene in the hollow gas filling valve made as described above.
After the liter was filled with a gas pressure of 1.0 kg / cm ² for about 5 seconds, it was left for 30 days, and the state of leakage of helium gas from each part of the hollow body was examined.

As shown in Table 1, when the hollow body having the gas filling valve of the present invention is filled with helium gas, the amount of gas leaked from the hollow body is 0.6 liters or 0.
The amount was 02 liters / day, which is much less than the leakage amount of 2.0 liters / day of the hollow body having the conventional gas filling valve shown in Table 2.

[Advantages of the Invention] As described above, the gas filling valve of the present invention is a flexible thin piece that forms a gas filling hole in a hollow synthetic resin base material and closes the gas filling hole on the inner surface of the base material. A synthetic resin sealing valve member made of a thin film intermediate material having a melting point higher than those of the members is arranged between the base material and the sealing valve member so that one end thereof communicates with the gas filling hole. However, since the heat seal is adhered so as to form a ventilation path communicating with the inside of the hollow body through the intermediate material, the gas can be filled into the hollow body at a high speed, and the leakage of the filled gas is small. Therefore, the hollow body can be used for a long time.

In addition, the gas filling valve of the present invention can be made thinner than the conventional gas filling valve, so that the valve does not protrude to the surface of the hollow body and does not hinder the use of the hollow body and seals during use. There is no inconvenience such as the valve opening and the filled gas leaking.

[Brief description of drawings]

FIG. 1 is a sectional view of an example of the gas filling valve of the present invention, and FIG. 2 is a plan view thereof. FIG. 3 is a sectional view of the gas filling valve of the present invention when the hollow body is filled with gas. FIG. 4 is a sectional view of another example of the gas filling valve of the present invention, and FIG. 5 is a plan view thereof. 2 ... Hollow body, 2a ... Base material, 3 ... Gas filling hole 5 ... Intermediate material 6 ... Sealing valve member.

Claims (1)

[Scope of utility model registration request] 1. A synthetic resin sealing valve member, comprising a synthetic resin base material forming a hollow body, having a gas filling hole formed therein, and a flexible thin piece for closing the gas filling hole on the inner surface of the base material. And a sealing valve member, a thin film intermediate material having a higher melting point than these members is arranged so that one end of the intermediate material communicates with the gas filling hole, and the ventilation communicates with the inside of the hollow body through the intermediate material. A gas-filled valve characterized by being heat-sealed to form a passage.