JP4497609B2 - Ball for ball game - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a ball game ball such as a soccer ball or a handball, and more particularly to a ball game ball having a sewing structure.
[0002]
[Prior art]
Balls for ball games such as soccer balls are roughly classified into two types, that is, a sewn ball and a pasted ball due to the difference in structure. The sewing ball has a structure in which a plurality of leather panels are folded together around the leather panels and sewn together, and a rubber tube is accommodated therein. In order to maintain a spherical shape, a plurality of cloths are bonded to the back surface of the leather panel to form a reinforcing layer. On the other hand, the pasted ball is formed by winding a nylon thread of several thousand meters on the surface of a rubber tube in a random direction to form a reinforcing layer that maintains a spherical shape, and then bonding a leather panel on the reinforcing layer.
[0003]
Usually, the stitched ball has a narrow and deep groove at the seam, so it is easy to grip when held in the hand, ball control when kicking, etc., excellent flight distance, and soft touch. There is an advantage that the impact when the ball hits the body or when the ball is kicked can be suppressed. Therefore, recently, a sewing ball has been widely used. For the leather layer, natural leather, artificial leather and other leather-like materials are used.
[0004]
In the sewing ball, when the valve is attached, for example, the structure shown in FIG. 5 is often employed. That is, a thin circular hook-shaped member is formed at the upper end of the rubber valve, and this is applied to the back surface of the leather panel in which the air injection hole is formed, and a piece of cloth is put on and sewn with a thread. Sewing together prevents the valve from peeling from the leather panel and ensures alignment of the valve with respect to the leather panel. Also, only a leather panel to which a valve is attached is provided with a separate support piece on the back surface thereof, and a valve is fitted into a hole formed in the back, and the support piece is sewn at the end of the leather panel (Japanese Utility Model 36-). No. 8228).
[0005]
[Problems to be solved by the invention]
In the conventional structure shown in FIG. 5, since the cloth piece 2 is sewn to the leather panel 4 with the thread 3 at the fixed part of the valve 1, this part becomes hard and it hurts when it hits the body. There is a problem that it causes regular bounce, and further, the appearance is not good. In addition, since the yarn is exposed on the surface of the skin layer, there is a problem that it may be worn out and worn out as it is repeatedly used, and the valve may come off. Furthermore, in the structure disclosed in the above publication, since only the leather panel to which the valve is attached is provided with a support piece, the rebound resilience of this leather panel part is different from other parts, and the support piece and the leather panel are bonded. Therefore, there is a problem that the center of the valve is displaced from the air injection hole of the leather panel while the kick ball or the like is repeated, and thereafter the air injection operation cannot be performed.
[0006]
The present invention has been made in view of such circumstances, and provides a ball game ball that ensures the connection between the valve and the skin layer and has physical properties such as the resilience of the valve mounting portion as close as possible to other portions. To do.
[0007]
[Means for Solving the Problems]
The present invention (Claim 1) is formed by sewing a spherical hollow body rubber tube, a rubber valve for injecting air into the tube, and the periphery of a plurality of polygonal leather panels. A ball game ball comprising a skin layer covering the tube, wherein the polygonal leather panel comprises a plurality of polygonal leather layers in which air injection holes are formed, and a plurality of polygonal cloths. And a reinforcing layer that is bonded to the lower surface of the leather layer and has an air injection hole communicating with the air injection hole. The valve includes a hole into which an air injection needle is inserted, and the valve. A leather-like portion formed integrally with the valve on the upper portion of the leather, and the leather-like portion in a state where the hole-like portion is aligned with the hole for air injection formed in the reinforcing layer. The bottom layer is sewn with the reinforcing layer and thread It has been one in which the thread of the upper surface and being covered by the leather layer.
[0008]
In such a structure, since the hook-shaped portion of the valve is sewn to the reinforcing layer with a thread, both are firmly bonded. Further, since the upper end of the yarn is covered with the leather layer, it is not exposed to the ball surface.
[0009]
A ball game ball according to the present invention (Claim 2) is provided with a cushioning material layer at least in a portion between the leather layer and the reinforcing layer to which the valve is attached, and the upper surface of the yarn is the cushioning layer. It is covered with a material layer. In such a configuration, the surface of the leather layer of the valve mounting portion that is originally harder than the other portions is softened.
[0010]
In the ball game ball according to the present invention (Claim 3), the skin layer is composed of 12 pentagonal leather panels and 20 hexagonal leather panels, and can be a soccer ball or a handball. In such a configuration, the valve is positioned at the center of a single hexagonal leather panel, for example, and an air injection hole is formed in the center of the leather panel.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
In FIGS. 1 and 2, 5 shows an example of a soccer ball, 6 is a tube formed in a spherical hollow body with an air non-permeable elastic material such as natural latex rubber, and 7 is compressed air on the tube 6. Is a rubber valve made of natural latex, and disk-shaped bowl-shaped portions 8a and 8b are integrally formed at the upper end portion and a portion slightly below the upper end portion, respectively. In addition, a thin hole 21 into which an air injection needle (not shown) is inserted is formed in the middle of the valve 7 halfway. Reference numeral 22 denotes a notch formed in the lower part of the hole 21 in the form of a slit. The needle penetrates the notch 22 and is inserted into the tube 6 so that air is injected.
[0012]
Reference numeral 9 denotes a valve holder for accommodating the valve, which is made of an elastic material such as natural latex rubber, like the valve 7, and has a disk-like bowl-shaped part 10 integrally formed at the upper end thereof. The portion 10 is configured to sit in a recess 11 that is recessed in the valve mounting portion of the tube 6.
[0013]
When the valve 7 is accommodated in the valve holder 9 and attached to the valve attachment portion of the tube 6, the flange-like portion 8 b at the lower part of the valve 7 sits in the recess 11 formed in the valve attachment portion and It rides on the upper surface of the shaped part 10 and is set in a state slightly protruding from the surface of the tube 6. The valve 7 is connected to the tube 6 through the valve holder 9 by vulcanization adhesion.
[0014]
12 is a skin layer composed of a plurality of polygonal leather panels, specifically, 12 pentagonal leather panels 13 and 20 hexagonal leather panels 14, and the periphery of each of the leather panels 13 and 14 is on the inside. It is folded and stitched with a thread 15 to form a spherical shape. The leather panels 13 and 14 are adhered to the lower surface of the buffer layer 19 and a buffer layer 19 made of EPDM foam or the like, which is provided on the lower surface of the leather layer 16 and lowers the impact when the ball is kicked. The reinforcing layer 17 is composed of a plurality of pieces, in the illustrated example, four pieces of cloth 17a, 17b, 17c, 17d. As the leather layer 16, natural leather or artificial leather is used.
[0015]
An air injection hole 18 is formed at the center of the leather panel 14 to which the valve 7 is attached, and an air injection needle (not shown) enters therein.
[0016]
Here, the cushioning material layer 19 is required so that the leather panel 14 to which the valve 7 is attached does not have a resilience that is different from other parts. In the example shown in FIG. 2, the cushioning material layer 19 is provided on all the leather panels 13, 14. However, the structure may be provided only on the leather panel 14 to which the valve 7 is attached. This is because the leather panel 14 to which the valve 7 is attached tends to have a hard feel. An air injection hole 23 having the same diameter is formed at the center of the buffer material layer 19 so as to communicate with the air injection hole 18 provided in the leather layer 16 on the surface.
[0017]
Further, as the cloths 17a, 17b, 17c, and 17d forming the reinforcing layer 17, cotton cloth or cotton / polyester mixed spun cloth is used, and the upper two sheets are cotton cloth and the lower two are cotton / polyester mixed cloth. The cloths 17a, 17b, 17c, and 17d are also formed with air injection holes 24 that communicate with the air injection holes 18 and 23 of the leather layer 16 and the cushioning material layer 19 at the center thereof.
[0018]
The fabrics 17a, 17b, 17c and 17d constituting the reinforcing layer 17 are woven fabrics in which warp yarns and weft yarns are crossed. The four fabrics 17a, 17b, 17c and 17d are alternately arranged in the warp direction. They are arranged so as to be orthogonal. Thereby, the tensile strength in the warp direction and the weft direction of the reinforcing layer 17 becomes equal. When the woven fabric is pulled in an angled direction such as 45 degrees with respect to the warp direction and the weft direction, a large expansion / contraction action is obtained (bias effect). When an external force is applied to the ball 5, the external force depends on the external force. Stretch and relieve shock. In addition, since it has a strong tensile strength in the warp and weft directions of the woven fabric, it functions to reinforce the leather panels 13 and 14.
[0019]
The four cloths 17a, 17b, 17c, and 17d are bonded to each other with latex rubber paste to form one reinforcing layer 17, and then cut into a pentagon or a hexagon.
[0020]
Thereafter, the bulb 7 is positioned at the center of the reinforcing layer 17 cut into a pentagon or hexagon, and the flange portion 8a at the upper end of the bulb 7 is applied to the lower surface of the reinforcing layer 17, so that a narrow hole at the center of the bulb is formed. 21 is aligned with the air injection hole 24 on the reinforcing layer 17 side.
[0021]
Then, the flange-like portion 8a of the valve 7 applied to the lower surface of the reinforcing layer 17 and the reinforcing layer 17 are threaded around the air injection hole 18 as shown in FIG. 3 and FIG. The two threads are sewn together at two locations on the left and right sides, and the valve 7 is sewn and fixed to the reinforcing layer 17. As the yarn 26, a polyester yarn can be used.
[0022]
On the other hand, separately from the formation of these reinforcing layers 17, after the buffer material layer 19 positioned on the reinforcing layer 17 and the uppermost leather layer 16 are bonded together with latex glue, they are also pentagonal or Cut into hexagons.
[0023]
The leather layer 16 and the cushioning material layer 19 that are cut into a pentagon or a hexagon are bonded to the reinforcing layer 17 that has the valve 7 sewn on the lower surface, and both are bonded with a chloroprene rubber paste. Let me.
[0024]
Thus, the leather layer 16, the cushioning material layer 19, and the cloths 17a, 17b, 17c, and 17d are bonded with the chloroprene rubber paste to form a single leather panel.
[0025]
The reinforcing layer 17 is referred to as a packing material, and provides the ball 5 with a true spherical property, shape maintaining property, and durability, and also protects the tube 6. In the reinforcing layer 17, a buffer layer made of a foam material such as CR, polyurethane, EPDM or the like may be interposed between the cloths 17a, 17b, 17c, 17d, or a polyester film, PVC film, polyethylene film, polypropylene film. A reinforcing layer made of a film having a high isointensity can also be interposed.
[0026]
The periphery of the leather panel 14 is folded inward and stitched together with the leather panels 13 and 14 and the thread 15 adjacent to the leather layer 16 and the reinforcing layer 17.
[0027]
In this way, the valve 7 is attached to the leather layer 16 by sewing the valve 7 to the reinforcing layer 17 composed of a plurality of cloths 17a, 17b, 17c, 17d below the leather layer 16, so that the valve 7 is leather. The layer 16 is firmly fixed, and there is no possibility of peeling from the leather layer 16. Moreover, since the upper surface of the thread 26 to be sewn is covered with the leather layer 16 and is not exposed to the surface, the appearance of the ball is improved, and the thread 26 is not worn out and the valve 6 is not detached. .
[0028]
In the above embodiment, the example of the soccer ball 5 has been described. However, 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 a soccer ball, but the diameter of the ball is different.
[0029]
【The invention's effect】
According to the present invention (Claim 1), the valve has a structure in which the hook-shaped portion integrally formed on the upper surface thereof is sewn and attached to the reinforcing layer positioned under the leather panel on the surface with the thread. Is firmly bonded to the reinforcing layer and thus also firmly to the leather panel. Therefore, the valve is not peeled off from the leather panel, and the problem that the center of the valve and the air injection hole of the leather panel are shifted to hinder the air injection operation does not occur.
[0030]
In addition, the sewn thread stays in the reinforcing layer and is not exposed on the surface of the leather panel, so the appearance is good and there is no worry that the thread will be worn out by using it for a long time. Enable.
[0031]
According to the present invention (Claim 2), the leather layer to which at least the valve is attached has a buffer layer interposed between the leather layer and the reinforcing layer located below the leather layer, so that the leather layer is originally more than other parts. Since the surface of the leather layer of the valve mounting part that hardens is softened, the ball repels uniformly regardless of where the ball is kicked, the irregular band is reduced, and the rebound resilience is uniform and easy to use. It becomes a ball.
[0032]
According to the present invention (Claim 3), the outer skin layer is composed of 12 pentagonal leather panels and 20 hexagonal leather panels, whereby a soccer ball or a handball can be obtained. And, the coincidence between one of the skin layers, for example, the air injection hole provided in the center of the hexagonal leather panel, and the central air injection provided in the valve arranged below the valve Since it is maintained by being firmly fixed to the leather panel, even if the ball bounces and receives a strong impact, there is little possibility that the holes will slip and become unusable, for soccer competitions and handball competitions This is suitable as a ball.
[Brief description of the drawings]
FIG. 1 is a front view showing a ball game ball according to an embodiment of the present invention.
2 is a cross-sectional view taken along line II-II in FIG.
FIG. 3 is a top view of a reinforcing layer to which a valve is attached.
4 is a cross-sectional view taken along line IV-IV in FIG.
FIG. 5 is a cross-sectional view showing a conventional structure.
[Explanation of symbols]
1, 7 Valve 2 Cloth piece 3, 15 Thread 4, 13, 14 Leather panel 5 Soccer ball 6 Tube 9 Valve holder 8a, 8b Saddle-shaped part 12 Skin layer 16 Leather layer 17 Reinforcing layer 17a, 17b, 17C, 17d Cloth 18 , 23, 24 Air injection hole 19 Buffer material layer 26 Thread

Claims (3)

A spherical hollow body rubber tube;
A rubber valve for injecting air into the tube;
An outer skin layer covering the tube, formed by sewing the periphery of a plurality of polygonal leather panels;
A ball for ball games comprising:
The polygonal leather panel is
A polygonal leather layer in which air injection holes are formed;
A plurality of polygonal cloths stacked and bonded to the lower surface of the leather layer, and a reinforcing layer formed with air injection holes communicating with the air injection holes;
Have
The above valve
A hole into which the air injection needle is inserted, and a hook-like portion formed integrally with the valve at the top of the valve ,
The hook-shaped portion is sewn with the reinforcing layer and a thread on the lower surface of the leather layer in a state where the hole and the air injection hole formed in the reinforcing layer are aligned,
A ball for ball games, wherein an upper surface of the yarn is covered with the leather layer. A buffer material layer is provided at least in a portion between the leather layer and the reinforcing layer to which the valve is attached,
2. The ball game ball according to claim 1, wherein an upper surface of the yarn is covered with the cushioning material layer.   3. The ball game ball according to claim 1, wherein the skin layer is composed of 12 pentagon leather panels and 20 hexagon leather panels, and the game ball is a soccer ball or a handball. .

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