JP2000245875A - Ball for ball game - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the hardening of vicinity of a valve to a minimum by forming a flange-shaped part integrally with a valve, which is made of a rubber for air injection and formed in a spherical hollow body tube made of a rubber, in the upper surface of the valve and bonding the flange-shaped part between the reinforcing layers of leather panels so as to sandwich it between them. SOLUTION: A soccer ball comprises a tube formed of an elastic material into a spherical hollow body, and a valve 7 is disposed in the tube. A plurality of polygonal leather panels are skin layers formed of twelve pieces of pentagonal leather panels 13 and twenty pieces of hexagonal leather panels 14, and each of the leather panels 13 and 14 is constituted of a surface leather layer 16 and a reinforcing layer 17 formed of four pieces of cloth 17a-17d adhered to the lower surface of the surface leather layer 16. In this case, a flange-shaped part 11 formed slightly protrudingly from the surface of the tube is formed at the upper end of the valve 7. Then the valve 7 is located at the center of one leather panel 14, and the flange-shaped part 11 is sandwiched between the upper two pieces of cloth 17a and 17b and the lower two pieces of cloth 17c and 17d and bonded with a rubber cement.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a soccer ball,
The present invention relates to a ball for a ball game such as a handball, and particularly to a ball for a ball game having a sewing structure.

[0002]

2. Description of the Related Art Balls for ball games, such as soccer balls, are broadly classified into two types, namely, sewn balls and pasted balls, due to their differences in structure. The sewing ball has a structure in which a plurality of leather panels are bent inward at the periphery thereof and sewn, and a rubber tube is housed therein. In order to maintain a spherical shape, a plurality of cloths are adhered to the back surface of the leather panel to form a reinforcing layer. On the other hand, in the pasting ball, a nylon thread of several thousand meters is wound around the surface of a rubber tube in a random direction to form a reinforcing layer that maintains a spherical shape, and then a leather panel is bonded onto the reinforcing layer.

Normally, a sewing ball has a narrower and deeper groove at a seam portion, so that it has a gripping property, that is, it is easy to grasp when holding it in a hand, a ball controllability at the time of a kicking ball, an excellent flight distance, and a feeling of touch. Since it is soft, there is an advantage that the impact when the ball hits the body or when the ball is kicked can be suppressed. Therefore, recently, sewing balls have become more widely used. As the leather layer, natural leather, artificial leather, or other leather-like materials are used.

[0004] In mounting a valve on a sewing ball, for example, a structure shown in FIG. 3 is often employed. That is, a thin circular flange-shaped member is formed at the upper end of the rubber valve, and this is sewn with a thread on a back surface of the leather panel having the air injection hole formed thereon. Sewing prevents the valve from peeling from the leather panel and ensures alignment of the valve with the leather panel. A structure is also known in which only a leather panel to which a valve is attached is provided with a separate support piece on the back surface, the valve is fitted into a hole formed in the support panel, and the support piece is sewn to the end of the leather panel (Jikken Sho 36-). No. 8228).

[0005]

In the conventional structure shown in FIG. 3, the cloth piece 2 is sewn to the leather panel 4 with the thread 3 at the fixed portion of the valve 1, so that this portion becomes hard, and There is a problem that it hurts when hit, causes irregular bounds, and has poor appearance. Further, in the structure disclosed in the above publication, since the supporting piece is provided only on the leather panel for mounting the valve, the resilience of the leather panel portion is different from that of the other portions, and the supporting piece and the leather panel are bonded. Therefore, there is a problem that the center of the valve shifts from the air injection hole of the leather panel during repeated kicking and the like, and the air injection operation cannot be performed thereafter. Therefore, such a structure is not actually employed.

The present invention has been made in view of the above circumstances, and provides a ball for ball games in which the physical properties such as the rebound resilience of a valve mounting portion are as close as possible to those of other portions.

[0007]

A ball for ball games according to the present invention (claim 1) is a rubber tube having a spherical hollow body, a rubber valve for injecting air formed in the tube, and a plurality of multi-balls. A leather layer for covering the tube formed by sewing the periphery of the square leather panel, wherein the leather panel is formed by stacking a plurality of the polygon-shaped leather layers and a plurality of the polygon-shaped cloths; In a ball for a ball game comprising a reinforcing layer bonded to a lower surface, a flange portion is formed integrally with the valve on the upper surface of the valve, and the flange portion is formed on the cloth between the reinforcing layers of the leather panel. It is sandwiched and adhered.

In such a structure, the flange portion of the bulb is sandwiched and adhered between the cloths constituting the reinforcing layer, and the position of the bulb relative to the leather panel is fixed. The reinforcement layer is folded inward at the periphery thereof together with the leather layer, and is sewn to the adjacent leather panel. The valve is therefore firmly fixed to the leather panel. Further, the leather panel to which the valve is attached is composed of the same components as the other leather panels, and since no special components are added, physical properties such as rebound resilience similar to those of other leather panels are obtained.

A ball for ball games according to the present invention (claim 2), wherein the skin layer is composed of 12 pentagonal leather panels and 20 hexagonal leather panels, and can be a soccer ball or a handball. It is. In such a configuration, the valve is positioned at the center of a single, for example, hexagonal leather panel, and a hole for injecting air is drilled at the center of the leather panel.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIGS. 1 and 2, reference numeral 5 denotes an example of a soccer ball, and reference numeral 6 denotes a tube formed in a spherical hollow body from an air-impermeable elastic material such as butyl rubber or latex rubber. Reference numeral 7 denotes a rubber valve for injecting compressed air into the tube 6, which is connected to the tube 6 by vulcanization or the like. Reference numeral 8 denotes a rubber pad mounted at the center of the valve 7, and a thin hole 9 into which an air injection needle (not shown) is inserted is formed partway. 10 is
At the notch formed below the hole 9, the needle penetrates the notch, is inserted into the tube 6, and air is injected. 11 is a tube 6 at the upper end of the valve 7
It is a thin disk-shaped flange-shaped portion formed slightly (about 2 mm) from the surface.

Reference numeral 12 denotes a skin layer comprising a plurality of polygonal leather panels, specifically, 12 pentagonal leather panels 13 and 20 hexagonal leather panels 14.
The periphery of 3, 14 is folded inward and stitched with a thread 15 to form a spherical shape. Leather panels 13, 14
Is a plurality of sheets bonded to the surface leather layer 16 and the lower surface thereof,
In the illustrated example, four cloths 17a, 17b, 17c, and 17d are used.
It is composed of a reinforcing layer 17 made of. As the leather layer 16, natural leather or artificial leather is used. The cloth 17a,
Cotton cloth or a mixed cloth of cotton and polyester is used as 17b, 17c and 17d. The leather layer 16 and the reinforcing layer 17 are cut into a pentagon or a hexagon after being bonded to each other.

The cloths 17a, 17b,
17c and 17d are woven cloths woven by intersecting warp and weft, and four cloths 17a, 17b, 17c and 17d are used.
Are arranged such that their warp directions are alternately orthogonal. Thereby, the tensile strength of the reinforcing layer 17 in the warp direction and the weft direction becomes equal. When the woven fabric is pulled in a direction at an angle such as 45 degrees with respect to the warp direction and the weft direction, a large expansion / contraction effect is obtained (bias effect), and when an external force is applied to the ball 5, the woven fabric responds to the external force. It expands and contracts, reducing the impact. Also, since the woven fabric has a high tensile strength in the warp and weft directions, it functions to strengthen the leather panels 13 and 14. Leather layer 16 and cloths 17a, 17b, 17
c and 17d are bonded with latex glue to form one leather panel 13 or 14. The reinforcing layer 17 is referred to as a packing material, and functions to provide the ball 5 with sphericity, shape retention, and durability, and to protect the tube 6. Cloths 17a, 17b, 17c,
Between 17d, an impact buffer layer made of a foam material such as CR, polyurethane, EPDM, or a reinforcing layer made of a high-strength film such as a polyester film, a PVC film, a polyethylene film, or a polypropylene film may be used. it can.

The valve 7 is located at the center of one leather panel 14, and at the center of the leather panel 14,
A small hole 18 having a diameter substantially equal to the diameter of the worm rubber 8 is formed. Also, four cloths 17a on the back of the leather panel 14,
17b, 17c, 17d, that is, the upper two cloths 1
The flange-shaped portion 11 of the valve 7 is sandwiched between 7a, 17b and the two lower cloths 17c, 17d, and is adhered with chloroprene-based rubber paste. A small hole having a diameter substantially equal to the small hole 18 is formed at the center of the upper two cloths 17a and 17b, and a diameter larger than the small hole 18 for passing the valve 7 is formed at the center of the lower two cloths 17c and 17d. Holes are formed. Leather panel 1
The periphery of 4 is folded inward and sewn to the adjacent leather panels 13 and 14 together with the leather layer 16 and the reinforcing layer 17.

In the above embodiment, the example of the soccer ball 5 has been described, but the present invention can be applied to a handball limited to this. In this case, the shape of the leather panel is the same as that of the soccer ball, but the diameter of the ball is different.

[0015]

According to the present invention (claim 1), the need for a suture around the valve and a piece of cloth disposed inside the sewn portion in the conventional structure is eliminated, so that hardening of this portion is minimized. Is suppressed. Therefore, even if this part hits the human body, the impact of the other leather panel part is not much different, and the irregular bound is suppressed to a degree that does not affect the practical use. Further, since no sewing thread is required, the appearance is improved. Furthermore, since the valve is firmly adhered to the leather panel, the position of both does not shift,
There is no hindrance to the air injection operation.

According to the present invention (claim 2), in a soccer ball or a handball which is a ball for a ball game having a sewing structure having a reinforcing layer on a leather panel, the valve is fixed using the reinforcing layer. , There is no need to add new components, so the ball rebound
The effect on physical properties can be minimized.

[Brief description of the drawings]

FIG. 1 is a front view showing a ball for ball game according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a sectional view showing a conventional structure.

[Explanation of symbols]

 1,7 Valve 2 Cloth piece 3,15 Yarn 4,13,14 Leather panel 5 Soccer ball 6 Tube 8 Mussel rubber 11 Flange portion 12 Skin layer 16 Leather layer 17 Reinforcement layer 17a, 17b, 17C, 17d Cloth 18 Small hole

Claims (2)

[Claims] 1. A rubber tube having a spherical hollow body, a rubber valve for air injection formed in the tube, and a skin layer covering the tube formed by sewing around a plurality of polygonal leather panels. Wherein the leather panel is a ball for ball games, comprising: the polygonal-shaped leather layer; and a reinforcing layer bonded to a lower surface of the leather layer by laminating a plurality of the polygonal-shaped cloths. A ball-shaped ball formed integrally with the bulb, the flange-shaped portion being sandwiched between the reinforcing layers of the leather panel by the cloth and adhered to the ball. 2. The game machine according to claim 1, wherein the skin layer comprises 12 pentagonal leather panels and 20 hexagonal leather panels, and the game ball is a soccer ball or a handball. Ball for ball games.