JP2021080960A - Air injection valve and hollow body using the same - Google Patents

Abstract

To provide an air injection valve which is compact in size, light in weight, and hardly causes air leakage, allows the easy injection of air, and is hardly deteriorated, and a hollow body using the same.SOLUTION: An air injection valve has: a stepped circular columnar valve core 11 from which a center portion of a circular column is hung out; and a cylindrical holding body 15 having a bottomed main body 151 into which the valve core is incorporated in a tight adhesion state, and a flange 152 joined to an inner wall face of the hollow body 20 at an upper end part of the main body. The valve core protrudes from the holding body at its tip part while having a slit which penetrates a center part, and the holding body has a needle hole penetrated with an air injection needle of the hollow part which is inserted with the slit of the valve core at a bottom part of the main body being a seat face of the valve core.SELECTED DRAWING: Figure 1

Description

The present invention relates to an air injection valve for injecting air used in a hollow body used at a predetermined internal pressure and a hollow body using the valve.

An air injection valve for injecting air is used for a hollow body such as a volleyball, a soccer ball, or a basketball, and a hollow body having a predetermined internal pressure can be used. This air injection valve is joined in a state of being suspended from the inner wall surface of the navel hole of the hollow body, is small so as not to upset the balance of the hollow body, does not leak air, and injects air. There is a demand for an easy air injection valve. Therefore, proposals have been made to improve such various functions.

For example, in Patent Document 1, a needle piercing valve mounted on a hollow ball and having a piercing hole through which an injection needle for air injection is pierced, wherein the needle piercing valve is a silicone containing silicone oil. The piercing hole is formed of rubber and extends in the axial direction, and is connected to a guide hole having an outer diameter larger than the outer diameter of the injection needle and a series from the bottom of the guide hole along the axial direction. , A needle piercing valve having an insertion hole having a cross-sectional shape similar to the cross-sectional shape of the injection needle has been proposed. The needle-piercing valve has a flange portion in a fitting recess provided inside a tubular hollow housing bonded to the inside of the base layer of a spherical shell having a three-layer structure consisting of a base layer, a reinforcing layer, and a skin layer. Since it is compressed in the radial direction and stored, it is said to have high airtightness.

Patent Document 2 describes a ball for ball games including a ball body including a bag-shaped air retainer having a through hole and an air injection valve attached to the through hole portion, wherein the valve is The holder includes a holder attached to the inner surface of the ball body and a substantially columnar worm that is inserted through the through hole and supported by the holder, and the holder has a support hole into which the worm is press-fitted. A substantially cylindrical holder body, a base portion projecting from around the base end portion of the holder body and attached to the inner surface of the ball body, and a support hole formed in the middle of the support hole having a diameter larger than that of the support hole. A flange portion having a groove portion formed so that the worm fits into the groove portion, a spherical concave portion formed on an outer end surface facing the outside of the ball body, and an inside of the ball body. A ball for ball games is proposed, which has a tubular cavity formed so as to extend from an inner end surface facing the recess toward the recess, and a notch connected to the deepest portion of the recess and the cavity. Has been done. It is said that this ball for ball games can be easily infused with air even by a weak woman or the like, and can effectively prevent foreign substances from entering.

Patent Document 3 includes a ball valve comprising a casing and a core that is at least partially disposed inside the casing, wherein the core includes a first sealing region comprising a plurality of portions. , The portion has alternating concave and convex curvatures, the casing includes a second sealing region, and the second sealing region engages the first sealing region. Valves have been proposed that are characterized by the ability to do so. In this valve, the inner end of the core extends beyond the casing, and the inner end is a hemisphere, which is evenly compressed by the air pressure inside the ball, so that air leakage is avoided. ..

Japanese Unexamined Patent Publication No. 2012-143421 Japanese Unexamined Patent Publication No. 2011-239875 Japanese Unexamined Patent Publication No. 2013-176617

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 bug described in Patent Document 2, or the core (valve core) described in Cited Document 3. This is done by leaning, and there is a problem that the valve core generally becomes long in the longitudinal direction. Therefore, it is not easy to improve any of the characteristics of the air injection valve, such as being compact and lightweight, preventing air leakage, and easily injecting air. Another problem is that deterioration of the valve core is not taken into consideration.

In view of such conventional problems and requirements, the present invention provides an air injection valve which is compact and lightweight, does not easily leak air, easily injects air, and does not easily deteriorate, and a hollow body using the same. With the goal.

The air injection valve according to the present invention has a stepped columnar valve core in which the central portion of the cylinder protrudes, a bottomed main body in which the valve core is incorporated in close contact, and an inner wall surface of a hollow body at the upper end of the main body. A valve for air injection having a cylindrical retainer having a flange joined to the valve core, the valve core having a slit penetrating a central portion, the tip of which protrudes from the retainer, and the retainer. The body has a needle hole at the bottom of the main body, which is the seating surface of the valve core, through which the air injection needle of the hollow body through which the slit of the valve core is inserted penetrates.

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

Further, the valve for air injection according to the above invention is provided, the tip of the valve core is fitted into the navel hole of the hollow body used at a predetermined internal pressure, and the flange of the holding body is joined to the inner wall surface of the hollow body. It is possible to form a hollow body.

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

Further, the hollow air injection valve according to the present invention has a valve core built in a bottomed cylinder 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 sits. The bottom of the body may have a needle hole through which the air injection needle of the hollow body through which the slit of the valve core is inserted penetrates.

The air injection valve according to the present invention is compact and lightweight, does not easily leak air, easily injects air, and does not easily deteriorate. The hollow body using the air injection valve according to the present invention can be used at a high internal pressure.

It is explanatory drawing which shows the state which the air injection valve which concerns on this invention is attached to the inner wall surface of a hollow body. It is explanatory drawing of the air injection valve which concerns on this invention.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. FIG. 1 shows 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 shows the configuration of the main air injection valve. As shown in FIG. 1, the air injection valve 10 is used by being incorporated in the hollow body 20. The air injection valve 10 is incorporated into the hollow body 20 by joining the 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 holding body 15, and the tip portion of the valve core 11 is fitted into the navel hole portion 25 of the hollow body 20.

As shown in FIG. 2, the air injection valve 10 includes a valve core 11 and a holding body 15. The valve core 11 has a stepped columnar shape in which the central portion of the cylinder protrudes, and the central portion 113 of the cylinder 112 protrudes. The valve core 11 has a slit 115 penetrating the central portion thereof, and an air injection needle receiving port 114 for receiving an air injection needle is provided at the tip portion thereof. The central portion 113 occupies a large proportion of the valve core 11, and the length occupies 40 to 60% of the total length. The appearance of the valve core 11 is different from that of a conventional valve core having a collar-shaped overhang on a cylinder. That is, in order to improve the leakage prevention property of the air injection valve 10, 40 to 60% of the total length of the slit penetrating the valve core 11 is tightened by the holding body 15 via the central portion 113. The air injection needle receiving port 114 of the valve core 11 has a hemispherical bowl shape. As the material of the valve core 11, for example, natural rubber is used.

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

The flange 152 is provided in 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 without peeling from the hollow body 20. The shape of the flange 152 can be a disk shape or a square plate shape, but it is preferable that the flange 152 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. If it is a spherical hollow body 20, a curved flange 152 having a curvature equivalent to that of the inner wall surface thereof is preferable.

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

The air injection valve and the hollow body incorporating the air injection valve according to the present invention have been described above. The air injection valve according to the present invention is characterized in that the valve core is built in a holding body or a bottomed cylinder. Therefore, the air injection valve according to the present invention is compact and lightweight, does not easily leak air, easily injects air, and does not easily deteriorate. The air injection valve according to the present invention can reduce the weight by 20% or more (20 to 40%) as compared with the conventional product. The internal pressure of the hollow body incorporating the air injection valve according to the present invention can be 0.03 to 0.3 MPa.

10 Air injection valve
11 Valve core
112 Cylinder
113 Central part
114 Air injection needle inlet
115 slit
15 retainer
151 body
152 Flange
153 bottom
155 Valve core hole
156 opening
157 Needle hole
20 hollow body
25 Navel hole

Claims (5)

A cylindrical valve core with a stepped columnar valve core overhanging the central part of the cylinder, a bottomed main body in which the valve core is built in close contact, and a flange joined to the inner wall surface of the hollow body at the upper end of the main body An air injection valve having a retainer and
The valve core has a slit penetrating the central portion, and the tip portion thereof protrudes from the holding body.
The holding body is an air injection valve having a needle hole through which an air injection needle of the hollow body through which a slit of the valve core is inserted is inserted in the bottom of a main body serving as a seating surface of the valve core. The air injection valve according to claim 1, wherein the length of the slit at the central portion of the overhang of the valve core is 40 to 60% of the total length of the slit. The air injection valve according to claim 1 or 2, the tip of the valve core is fitted into the navel hole of the hollow body used at a predetermined internal pressure, and the flange of the holding body is joined to the inner wall surface of the hollow body. Hollow body made to let you. The hollow body according to claim 3, wherein the predetermined internal pressure of the hollow body is 0.03 to 0.3 MPa. A hollow air injection valve
The hollow having a valve core built in a bottomed cylinder whose upper end is joined to the inner wall surface of the hollow body and suspended, and a slit of the valve core is inserted into the bottom of the bottomed cylinder on which the valve core sits. An air injection valve that has a needle hole through which the body's air injection needle penetrates.

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