JP2005291308A - Waterproof structure in gas cock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a waterproof structure in a gas cock which offers high adhesion, prevents deterioration of adhesion with the lapse of time and has no influence on rotation torque of a handle. <P>SOLUTION: A waterproof packing mounting part 9 having an L shape in a cross section made up of a vertical wall 7 and a horizontal wall 8 is formed on the outside of the outer peripheral surface of a handle mounting port 4 in a gas cock body 1. In the handle body 11 side mounted in the handle mounting port 4 of the gas plug body 1, a waterproof packing contact surface 15 is formed on a surface opposed to the waterproof packing mounting part 9 on the gas cock body 1 side. In a waterproof packing 20 mounted between the waterproof packing mounting part 9 of the gas cock body 1 and the waterproof packing contact surface 15 on the handle body 11 side, a high elastic ring 24 is assembled in a low elastic packing body 23 in which a horizontal intimate contact surface 21 and a vertical intimate contact surface 22 are formed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a waterproof structure for a gas stopper used by being attached to a gas pipe or a gas appliance.

A normal gas stopper has a structure in which a closure (plug) incorporated in a gas stopper body is opened and closed with a handle. A handle attachment port is formed on the side of the gas plug main body in order to incorporate the closer into the gas plug main body and to connect the closure to the handle.
In the case of such a gas stopper, there is usually only a part of the metal touch between the handle attachment port of the gas stopper body and the handle, and it is not waterproof. May cause trouble.
Therefore, there is a proposal to install a waterproof packing between the gas plug body and the handle.
Japanese Utility Model Publication No. 60-37672 The waterproof structure of a gas stopper disclosed in this patent document (utility model publication) 1 passes through a main body having a fluid inlet / outlet on both sides and a tapered sliding surface. A handle having a hole and having a tapered sliding surface that matches the tapered sliding surface of the main body is mounted, and a handle that transmits rotation to the plug while pressing the plug through a spring is provided. In the cock connected to the main body and opening and closing the fluid flow path by restricting the rotation of the handle to a predetermined angle, a gap is provided between the main body and the flange of the handle, and the gap is made of synthetic resin or the like. A gasket having a V-shaped cross section made of an elastic body is mounted.

However, the waterproof structure of the gas stopper (gas cock) disclosed in Patent Document 1 has the following drawbacks.
1. Since the gasket made of an elastic body is formed in a V-shaped cross section, the gasket is deformed into a compressed state when it is attached.
For this reason, stress concentrates on the V-shaped base, and over time, fatigue concentrates on the base, and the elastic force is reduced and the adhesion is reduced.
2. Since the gasket is V-shaped, the adhesion force is determined by the elastic force of the base.
For this reason, since there is a limit to the adhesion, in Patent Document 1, a metal split ring is sandwiched between V-shaped. However, when the metal split ring is sandwiched in this way, the flexibility of the gasket is greatly restricted, and the rotational torque of the handle becomes large, resulting in poor usability.
3. In the case of a V-type gasket, there is only one point of contact on the handle side and two points on the gas plug body side, and in particular, there is only one point of contact on the handle side. As it is not so expensive.

The object of the present invention is to improve the waterproof structure of the gas stopper described in Patent Document 1 described above. The first object is to provide a gas stopper that has high adhesion and that does not decrease over time. It is to provide a waterproof structure.
Furthermore, the second object is to provide a waterproof structure for the gas stopper in which the rotational torque of the handle does not increase so much even if the adhesion force is increased by increasing the elastic force of the waterproof packing itself and increasing the elastic force. It is to be.
Furthermore, the third purpose is to devise the shape of the waterproof packing, the shape of the waterproof packing mounting portion on the gas plug body side, and the shape on the handle side so that the adhesion area is increased while increasing the adhesion force by the elastic force of the waterproof packing. It is to provide a waterproof structure in a gas stopper that has been refined.

  In order to achieve the above object, in the invention according to claim 1, a waterproof packing mounting portion having an L-shaped cross section comprising a vertical wall and a horizontal wall is formed outside the outer peripheral surface of the handle mounting port of the gas plug body, On the handle body side attached to the handle attachment port of the gas stopper body, a waterproof packing contact surface is formed on the surface facing the waterproof packing attachment part on the gas stopper body side, the waterproof packing attachment part of the gas stopper body The waterproof packing that is mounted between the handle and the waterproof packing contact surface on the handle body side is a low-elasticity with an L-shaped cross section that has a vertical contact surface formed by bending the horizontal contact surface and the inner edge of the horizontal contact surface in the vertical direction. High elasticity of a quadrangle in cross section, which is mounted between the packing body and the horizontal contact surface and the vertical contact surface, and the lower surface projects downward from the lower end of the vertical contact surface. It is characterized in that consists of a ring.

  Furthermore, in the invention according to claim 2, the material of the low elastic packing body in the waterproof packing according to claim 1 is made of nitrile rubber or the like, and the high elastic ring is ethylene propylene rubber, chloroprene rubber, nitrile rubber or silicone rubber. It consists of sponge rubbers such as.

In the present invention, a vertical wall and a horizontal wall are formed in the waterproof packing mounting portion on the gas stopper body side, and the waterproof packing side is in close contact with the vertical contact surface closely contacting the vertical wall and the waterproof packing contact surface on the handle body side. By providing the low-elasticity packing main body formed with the horizontal contact surface, the waterproof packing is in close contact with the gas stopper main body side and the handle main body side.
As a result, the waterproof effect is remarkably enhanced as compared with the conventional V-shaped gasket.

Moreover, the waterproof packing of this invention forms the compression part in the lower part of a highly elastic ring, the elasticity is improved by the compression action of this compression part, and the contact | adhesion power is increased. On the other hand, the low elastic packing main body side ensures water tightness by low elasticity, and even if this low elastic packing main body side sags over time, it has the effect of maintaining the adhesive force by the elastic action of the high elastic ring. .
Further, the waterproof packing of the present invention uses a low elastic material such as nitrile rubber for the low elastic packing body that contacts the rotating surface of the handle, so that the rotational torque of the handle does not increase even if the adhesion force is increased.

1 is a cross-sectional view of a gas stopper embodying the present invention, FIG. 2 is a cross-sectional view of a main part, FIG. 3 is a perspective view of a waterproof packing in a state where a low-elasticity packing body and a high-elasticity ring are separated, and FIG. Is a cross-sectional view of the low-elasticity packing main body, (B) is a cross-sectional view of the high-elasticity ring, and FIG. 5 is an explanatory view of a state in which the low-elasticity packing main body and the high-elasticity ring are combined.
In FIG. 1 and FIG. 2, reference numeral 1 denotes a gas plug main body. A gas flow path 2 is formed in the gas plug main body 1 in the horizontal direction so as to be orthogonal to the gas flow path 2. The closing member 3 is incorporated in the. Reference numeral 4 denotes a handle attachment port for incorporating the closing member 3 in the gas plug main body 1. The outer peripheral surface 6 of the upper edge 5 of the handle attachment port 4 has a cross-section L made of a vertical wall 7 and a horizontal wall 8. A character-shaped waterproof packing mounting portion 9 is formed. Reference numeral 10 denotes a step portion for preventing the waterproof packing 20 from falling off, which is formed outside the horizontal wall 8 of the waterproof packing mounting portion 9 in the gas plug main body 1.

Reference numeral 11 denotes a handle body. An engaging portion 12 is formed at the center of the lower surface of the handle body 11 to engage the rotating shaft 3a formed on the closing member 3. A flange 13 that engages with the circumferential rotation groove 4 a formed on the inner peripheral surface is formed, and a waterproof packing contact surface 15 is formed so as to face the waterproof packing mounting portion 9.
Reference numeral 20 denotes a waterproof packing. As shown in FIGS. 3 to 5, this waterproof packing 20 forms a vertical contact surface 22 by bending the horizontal contact surface 21 and the inner end of the horizontal contact surface 21 in the vertical direction. The low elastic packing main body 23 having an inverted L-shaped cross section, the lower surface of the horizontal contact surface 21 of the low elastic packing body 23 and the outer periphery of the vertical contact surface 22, and the bottom surface below the lower end of the vertical contact surface 22. It is composed of a highly elastic ring 24 having a quadrangular cross section formed by projecting into a compression portion 25.

As shown in FIGS. 1 and 2, the waterproof packing 20 having this configuration brings the vertical contact surface 22 of the low elastic packing body 23 into close contact with the vertical wall 7 of the waterproof packing mounting portion 9 formed on the gas plug body 1 side. With the gas stopper body 1 in a compressed state, the horizontal contact surface 21 is in close contact with the waterproof packing contact surface 15 on the handle body 11 side, and the compression portion 25 of the high elasticity ring 24 is in close contact with the horizontal wall 8. It is assembled between the handle bodies 11.
This state is well shown in FIG. 2, and the low elastic packing main body 23 of the waterproof packing 20 is connected to the gas plug main body 1 and the handle main body 11 side by the elastic action of the compressed high elastic ring 24. It is extruded from the inside to increase the adhesion and secure the waterproof effect.
In the first embodiment, nitrile rubber is used for the low elastic packing body 23 and sponge rubber of ethylene propylene rubber is used for the high elastic ring 24. However, as long as a combination of low elasticity and high elasticity is assumed. Other materials may be used.

Explanatory drawing of the gas stopper which implemented this invention Illustration of waterproof packing mounting part Perspective view of waterproof packing with low elastic packing body and high elastic ring separated (A) is a cross-sectional view of a low-elasticity packing body, (B) is a cross-sectional view of a high-elasticity ring Explanatory drawing of the cross section in the state where low elastic packing body and high elastic ring are combined

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Gas stopper main body 9 Waterproof packing mounting part 11 Handle main body 15 Waterproof packing contact surface 20 Waterproof packing 21 Horizontal contact surface 22 Vertical contact surface 23 Low elastic packing main body 24 High elastic ring 25 Compression part

Claims (2)

  On the outer side of the outer peripheral surface of the handle attachment port of the gas stopper body, a waterproof packing mounting portion having an L-shaped cross section consisting of a vertical wall and a horizontal wall is formed, and on the handle body side attached to the handle attachment port of the gas stopper body, A waterproof packing contact surface is formed on a surface facing the waterproof packing mounting portion on the gas plug main body side, and waterproof is mounted between the waterproof packing mounting portion on the gas plug main body and the waterproof packing contact surface on the handle main body side. The packing is mounted between the horizontal contact surface and the vertical contact surface, and the horizontal contact surface and the inner surface of the horizontal contact surface are bent in the vertical direction to form a vertical contact surface, and the low-elasticity packing body having an L-shaped cross section is formed. And a highly elastic ring having a quadrangular cross section in which a compression portion is formed so that a lower surface protrudes downward from a lower end of the vertical contact surface. The gas of the waterproof packing according to claim 1, wherein the low elastic packing body is made of nitrile rubber or the like, and the high elastic ring is made of sponge rubber such as ethylene propylene rubber, chloroprene rubber, nitrile rubber or silicone rubber. Waterproof structure of the stopper.

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