JP7201239B2 - Air injection valve and hollow body using the same - Google Patents

Description

TECHNICAL FIELD The present invention relates to an air injection valve for injecting air into a hollow body used at a predetermined internal pressure, and a hollow body using the same.

Hollow bodies such as volleyballs, soccer balls, and basketballs use an air injection valve for injecting air, and hollow bodies having a predetermined internal pressure can be used. This air injection valve is attached to the inner wall surface of the navel hole of the hollow body while being suspended. There is a need for an easy-to-use air injection valve. For this reason, proposals have been made to improve these various functions.

For example, Patent Document 1 discloses a needle-piercing valve that is attached to a hollow ball and has a piercing hole through which an injection needle for injecting air is pierced, wherein the needle-piercing valve is made of silicone containing silicone oil. The piercing hole is formed of rubber, and has a guide hole extending in the axial direction and having an outer diameter larger than the outer diameter of the injection needle. , and an insertion hole having a cross-sectional shape similar to that of the injection needle has been proposed. This needle piercing valve has a three-layer structure of a base layer, a reinforcing layer, and a skin layer. It is said to have high airtightness because it is stored while being compressed in the radial direction.

Patent Document 2 discloses a ball for ball games comprising a ball body including a bag-like air retainer having a through hole, and an air injection valve attached to the through hole, wherein the valve is , a holder attached to the inner surface of the ball body, and a substantially cylindrical worm inserted through the through hole and supported by the holder, the holder having a support hole into which the worm is press-fitted. a substantially cylindrical holder main body; a base portion projecting from the base end portion of the holder main body and attached to the inner surface of the ball main body; a flange portion formed so that the worm fits into the groove portion; a spherical concave portion formed in the outer end face facing the outside of the ball body; and an inner side of the ball body. A ball for ball game is proposed, which has a cylindrical hollow portion formed to extend from an inner end face facing toward the concave portion toward the concave portion, and a notch portion connecting the deepest portion of the concave portion and the hollow portion. It is It is said that this ball for ball games can be easily inflated even by weak women, etc., and can effectively prevent foreign substances from entering.

US Pat. No. 6,200,003 discloses a ball valve comprising a casing and a core at least partially disposed within said casing, said core comprising a first sealing region comprising a plurality of portions. said portion having an alternating concave and convex curvature, said casing including a second sealing area, said second sealing area engaging said first sealing area; A valve is proposed which is characterized by: In this valve, the inner end of the core extends beyond the casing, and the inner end is hemispherical, and is evenly compressed by the air pressure inside the ball, thus avoiding air leakage. .

JP 2012-143421 A Japanese Patent Application Laid-Open No. 2011-239875 JP 2013-176617 A

The functional improvement of the air injection valve is characterized by the shape of the valve core, as shown in the needle piercing valve described in Patent Document 1, the worm described in Patent Document 2, or the core (valve core) described in Cited Document 3. The problem is that the valve core generally becomes longer in the longitudinal direction. For this reason, it is not easy to improve the characteristics of the air injection valve, such as compactness, light weight, resistance to air leakage, and easy injection of air. Moreover, there is a problem that deterioration of the valve core is not taken into consideration.

In view of such conventional problems and demands, it is an object of the present invention to provide an air injection valve that is compact, lightweight, resistant to air leakage, easy to inject air, and resistant to deterioration, and a hollow body using the same. With the goal.

The air injection valve according to the present invention comprises a stepped columnar valve core with a central part of the column protruding, a bottomed main body in which the valve core is incorporated in close contact, and an inner wall surface of the hollow body at the upper end of the main body. and an air injection valve having a cylindrical holder provided with a flange joined to the holding The body has a needle hole through which the air injection needle of the hollow body inserted through the slit of the valve core penetrates, in the bottom of the main body that serves as the seating surface of the valve core.

In the above invention, the length of the slit in the overhanging central portion of the valve core can be 40 to 60% of the total length of the slit.

A hollow body having the air injection valve according to the above invention and used at a predetermined internal pressure is fitted with the tip of the valve core in the navel hole, and the flange of the holding body is joined to the inner wall surface of the hollow body. A hollow body can be molded.

The predetermined internal pressure of the hollow body according to the invention can be 0.03 to 0.3 MPa.

Further, in the hollow body air injection valve according to the present invention, a valve core is incorporated in a bottomed cylindrical body whose upper end is joined to the inner wall surface of the hollow body and suspended, and the bottomed cylinder on which the valve core is seated. The bottom of the body may have a needle hole through which the air injection needle of the hollow body penetrates through the slit of the valve core.

INDUSTRIAL APPLICABILITY The air injection valve according to the present invention is compact and lightweight, is resistant to air leakage, is easy to inject air, and is resistant to deterioration. The hollow body using the air injection valve according to the present invention can be used under high internal pressure.

FIG. 4 is an explanatory diagram showing a state in which the air injection valve according to the present invention is attached to the inner wall surface of the hollow body; FIG. 2 is an explanatory diagram of an air injection valve according to the present invention;

EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing this invention is demonstrated based on drawing. FIG. 1 shows a state in which an air injection valve according to the present invention is attached to the inner wall surface of a hollow body. FIG. 2 shows the structure of this air injection valve. As shown in FIG. 1, the present air injection valve 10 is incorporated in a hollow body 20 for use. The air injection valve 10 is incorporated into the hollow body 20 by bonding its flange 152 to the inner wall surface of the hollow body 20 . The air injection valve 10 has a form in which the valve core 11 is built in the main body 151 of the holder 15 , and the tip of the valve core 11 is fitted into the navel hole portion 25 of the hollow body 20 .

The air injection valve 10 has a valve core 11 and a holder 15, as shown in FIG. The valve core 11 has a stepped cylindrical shape in which the central portion of the column protrudes, and the central portion 113 of the column 112 protrudes. The valve core 11 has a slit 115 penetrating through the central portion thereof, and an air injection needle receiving port 114 for receiving an air injection needle is provided at the distal end portion of the slit 115 . The center portion 113 of the present valve core 11 has a large proportion, and its length occupies 40 to 60% of the total length. That is, 40 to 60% of the total length of the slit penetrating the valve core 11 is clamped by the holder 15 via the central portion 113 in order to improve the leakproofness of the air injection valve 10 . The air injection needle receiving port 114 of the valve core 11 has a hemispherical bowl shape. Natural rubber, for example, is used as the material of the valve core 11 .

The holding body 15 is in the form of having a flange at the upper end of a bottomed cylinder, and has a main body 151 and a flange 152 . Synthetic rubber such as butyl rubber, for example, is used as the material of the holder 15 . The main body 151 is a bottomed cylinder having a valve core hole 155 inside, an opening 156 into which the valve core 11 is inserted, and a needle hole 157 in the bottom 153 . The valve core hole 155 is formed so that the valve core 11 is incorporated in the body 151 in close contact so that the air injection valve 10 does not leak air. The needle hole 157 is provided so as not to damage the bottom portion 153 when the air injection needle inserted through the slit 115 of the valve core 11 penetrates through the valve core 11 to inject air into the hollow body 20. The hole diameter is It is slightly smaller than the outer diameter of the air injection needle. For example, the hole diameter of needle hole 157 can be 1.5 mm.

The flange 152 is provided with a size of 40 to 60 mm, for example, when the outer diameter of the main body 151 is 17 mm, so that the air injection valve 10 is integrally joined to the hollow body 20 without peeling off. The shape of the flange 152 can be disc-shaped or square-plate-shaped, but preferably has a shape that follows the inner wall surface of the hollow body 20 so that it can be easily joined to the hollow body 20 . For a spherical hollow body 20, a curved flange 152 having the same curvature as its inner wall surface is preferred.

Hollow body 20 can be, for example, a volleyball, soccer ball, basketball or rugby ball. The hollow body 20 is not limited to being spherical, and may be elliptical or cylindrical. The hollow body 20 generally has a layer structure, and the inner wall surface is a tube layer made of butyl rubber or the like. The air injection valve 10 is joined together by, for example, gluing its flange 152 to the tube layer and vulcanizing. As shown in FIG. 1, the hollow body 20 has a navel hole 25 into which the tip of the valve core 11 is fitted. An air injection needle is inserted through an air injection needle receiving port 114 of the valve core 11 fitted in the navel hole 25 to inject air into the hollow body 20 .

The air injection valve according to the present invention and the hollow body incorporating the same have been described above. An air injection valve according to the present invention is characterized in that a valve core is incorporated in a holder or a cylindrical body with a bottom. For this reason, the air injection valve according to the present invention is compact and lightweight, does not easily leak air, is easy to inject air, and is difficult to deteriorate. The air injection valve according to the present invention can reduce the weight by 20% or more (20 to 40%) compared to conventional products. The hollow body incorporating the air injection valve according to the present invention can have an internal pressure of 0.03 to 0.3 MPa.

10 Inflation valve
11 valve core
112 Cylinder
113 central part
114 Inflation Needle Receptacle
115 slit
15 holder
151 Body
152 Flange
153 Bottom
155 valve core hole
156 opening
157 needle hole
20 hollow bodies
25 Navel

Claims (5)

A stepped columnar valve core whose center overhang is 40 to 60% of the total length, a bottomed main body in which the valve core is tightly integrated, and the inner wall surface of the hollow body at the upper end of the main body. a cylindrical retainer with a flange joined to the air injection valve,
the valve core has a slit penetrating through the center thereof and a tip end thereof protruding from the holder;
The holding body is an air injection valve having a needle hole through which an air injection needle for injecting air into the hollow body inserted through the slit of the valve core penetrates in the bottom of the main body serving as the seating surface of the valve core. . A stepped columnar valve core whose center overhang is 40 to 60% of the total length, a bottomed main body in which the valve core is tightly integrated, and the inner wall surface of the hollow body at the upper end of the main body. a cylindrical retainer with a flange joined to the air injection valve,
the valve core has a slit penetrating through the center from the bottom of the bowl-shaped opening of the air injection needle receiving port, and the tip of the slit protrudes from the holder;
The holding body is an air injection valve having a needle hole through which an air injection needle for injecting air into the hollow body inserted through the slit of the valve core penetrates in the bottom of the main body serving as the seating surface of the valve core. . A hollow body having the air injection valve according to claim 1 or 2 and used at a predetermined internal pressure is fitted with the tip of the valve core in the navel hole, and the flange of the holder is joined to the inner wall surface of the hollow body. Hollow bodies that let you. 4. The hollow body according to claim 3, wherein the predetermined internal pressure of the hollow body is 0.03-0.3 MPa. A hollow body air injection valve,
A stepped columnar valve core having a length of 40 to 60% of the total length of the central projecting portion is incorporated in a bottomed cylindrical body whose upper end is joined to the inner wall surface of the hollow body and suspended, and the valve core an air injection valve having a needle hole through which an air injection needle for injecting air into the hollow body through which the slit of the valve core is inserted is formed in the bottom of the bottomed cylindrical body on which the valve is seated.

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