WO2009065302A1

WO2009065302A1 - Bladder of sports ball and sports ball with the bladder

Info

Publication number: WO2009065302A1
Application number: PCT/CN2008/001854
Authority: WO
Inventors: Yung Pun Cheng
Original assignee: Yung Pun Cheng
Priority date: 2007-11-16
Filing date: 2008-11-07
Publication date: 2009-05-28
Also published as: CN201157649Y

Abstract

A bladder of a sports ball and a sports ball that made use of the bladder are provided. To improve the sports ball's production efficiency, control property, abrasion wear and perfect spherical shape, a reinforced layer is made with molding or blowing mold. The reinforced layer is spherical, which surrounding an inner tire that with valve for air inflating. The reinforce layer and the inner tire are composite of the bladder.

Description

Description: a sports ball liner and a sports ball made of the inner liner

[0001] The present invention relates to sports balls such as soccer balls, and more particularly to the inner bladder of sports balls. The combination of the inner tube and the reinforcing layer is referred to herein as a liner. Background technique

[0002] Generally, sports balls enclosed in air structures such as soccer, volleyball, and handball generally have an inflatable rubber inner tube, a reinforcing layer, and a skin layer made of leather. According to different manufacturing methods of the skin layer, the sports ball can be further divided into a hand stitching ball and a pasting ball.

An example of a hand-stitched ball is described in the specification of U.S. Patent No. 4,462,590, which is composed of a rubber inner tube which is made of a gas-tight rubber and which is sealed by a valve to form a spherical shape. The hollow body, that is, the bladder. The skin layer is formed by bending the end edges of the plurality of leather balls inward and stitching them with a thread to form a spherical shape. The stitching of such sports balls is performed by hand. The bladder is housed within the epidermal layer. The leather sheet is made of artificial leather or natural leather. In order to increase the strength, 3-4 pieces of woven fabric (called a backing material) were attached to the back of the artificial leather. This structure does not have a woven fabric covering the bladder or

[0004] The hand-sewn sports ball as described above has the advantages of being soft, good to the touch, easy to use, and good in ball control performance. On the other hand, however, since the ball is three-dimensional, and the leather ball piece reinforced with the backing material is thick (about 4-5 mm) and hard, it cannot be sewn by a sewing machine and can only be sewn by hand. Therefore, there are the following problems: Due to the proficiency in sewing and the difference in skill between different operators, the production efficiency of such sports balls is poor, the price is high, and there are, for example, uneven weights and sizes, and poor roundness. And other quality issues. The failure rate is 2-3 times that of the pasting ball described later, and the durability is poor and the deformation is easy.

[0005] When a sports ball (for example, a soccer ball) receives an internal pressure of about 1.0 kg/cm ² , it is subjected to an impact force of 100 kg or more when subjected to a kicking impact. Therefore, problems such as seam cracking may occur, and it may happen that, for example, the ball becomes larger than the standard or deformed. In addition, there are still because The problem of the impact breaking the suture and the inner tube flying out. In general, the durability of the hand-sewn ball is 1/2 to 1/3 or less of the pasting ball to be described later.

An example of a splicing ball is described in the specification of U.S. Patent No. 4,333,648, which includes: a rubber inner tube identical to the inner tube of the hand-sewn ball described above, which is formed by winding several kilometers of nylon thread in all circumferential directions of the ball. The layer (the structure of the winding wire is referred to as a winding structure), the covering rubber composed of a thin layer of vulcanized rubber coated on the reinforcing layer, and the skin layer composed of a plurality of leather balls bonded to the covering rubber.

[0007] wherein the inner tube and the reinforcing layer are collectively referred to as a liner.

With the reinforcing layer, the quality (weight, size, roundness, shape retention and durability) of the ball is stabilized and improved. The covering rubber has a function of firmly bonding the leather sheet to the ball.

Since the above-described pasting ball has the above-described structure and can be mechanized, the production efficiency is high, the weight and the size are small, and the price is low, the roundness and the durability are excellent. However, the disadvantage is that the touch is hard and can cause pain when it touches the human body. And because the ball is hard and difficult to control, it is difficult to play a high level of technology in the game.

[0010] The reason why the sticking ball is hard is that the impact generated when kicking the ball is absorbed only by the expansion and contraction of the nylon thread constituting the reinforcing layer, and the nylon thread itself has poor absorption ability.

[0011] Several improvement strategies have been proposed in response to the above problems.

[0012] U.S. Patent No. 5,772,545 teaches a ball of such a structure: The sport ball comprises: an inner tube identical to the two balls described above, and a nylon wire wound several kilometers on the inner tube to form a winding around the inner tube Line reinforcing layer; the end edges of the plurality of leather balls are bent inward, and then stitched by a sewing machine to form a skin layer. At this time, since there is a reinforcing layer around which the nylon thread is wound, the leather pellet does not require a backing material, so the leather pellet is thin (about 1.0-1.5 mm) and soft, and can be sewn by a sewing machine. The inner body, which is a combination of the inner tube and the nylon thread wound thereon, is inserted into a leather ball piece which is sewn into a spherical shape by a sewing machine.

[0013] Due to the structure as described above, manufacturing mechanization can be achieved, and its roundness and durability are excellent.

[0014] However, since the reinforcing layer is a winding structure like the pasting ball, the disadvantage of the hard ball and poor ball control of the pasting ball is still not eliminated. And because the lines used are thin and It exists on the surface, so there is a problem that it is cut off by collision with gravel or protrusion. In addition, there is also a problem that the pinhole of the leather ball piece is easily broken. Moreover, since the existence of the sewing thread can be seen between the balls, it gives a feeling of shoddyness.

[0015] In order to overcome the problems caused by the above two types of sports balls, a sports ball of the following structure was also invented.

[0016] Japanese Patent Publication No. 62-236568 discloses a ball having such a structure: as a reinforcing layer, 12 woven pieces of a substantially trapezoidal shape are sewn around the sewing machine to form a spherical bag layer, but Leaving one edge of the woven fabric sheet without stitching, forming a receiving opening by using the unseamed edge, turning the front and back sides of the cloth bag layer so that the stitched seam head is located inside, and placing the inner tube from the receiving hole into the bag layer Inside. Then, the seam of the accommodating opening is placed on the outer side for sewing. A leather ball is attached to the inner bag of the stitched bag, that is, the inner bag. The compressed air is then filled through a valve (not shown).

[0017] Due to the structure as described above, mechanization can be realized, production efficiency is high, price is low, and roundness and durability are excellent. Further, since the reinforcing layer is formed of a woven fabric sheet, the touch feeling is good due to the diagonal effect of the cloth, and the ball control performance is also good. The slanting effect means that the woven fabric exhibits a large stretchability when the woven fabric is stretched from a direction which is shifted by a certain angle, for example, 45 degrees with respect to the vertical and horizontal lines. Therefore, the expansion and contraction performance is excellent when subjected to an impact.

[0018] However, in the improvement measure, the seam of the receiving opening causes slight irregularities on the surface of the bag layer, and the unevenness is displayed on the surface of the sports ball through the leather ball, and the ball is shaken when the ball flies. Ball rolling and rebound irregularities and other shortcomings. Moreover, the above-mentioned unevenness gives a poor appearance and gives a low quality impression. For ball games such as croquet and handball, which emphasize the subtle touch of the fingertips, the slight unevenness on the surface of the ball is a major problem. In addition, since the reinforcing layer is composed of a plurality of woven pieces, whether it is hand sewing or sewing with a sewing machine, it is relatively complicated to manufacture, and requires a considerable amount of labor. Summary of the invention

[0019] In summary, there is a need for such a liner reinforcement layer, that is, a liner reinforcement layer of a sports ball that can overcome the defects of the various balls described above and that is simple to manufacture and low in cost. In view of the above problems in the prior art, an object of the present invention is to provide a sports ball liner which can be mechanized, has high production efficiency, is inexpensive, has excellent roundness and durability, and has no unevenness.

Another object of the present invention is to provide a sports ball comprising the above-described inner bladder, which has good ball control and feel.

[0022] According to one embodiment of the invention, the inner bladder of the sports ball includes a inner tube provided with a valve for filling the air, and a reinforcing layer surrounding the inner tube, wherein the reinforcing layer is a spherical reinforcing layer. According to an embodiment of the invention, the ball reinforcing layer may be made of a plastic material. The ball reinforcing layer is preferably made of a polyethylene material.

According to an embodiment of the present invention, the ball reinforcing layer may be formed by molding or blow molding. The sphere reinforcing layer is preferably made by blow molding.

According to an embodiment of the present invention, the ball reinforcing layer may be cut to form a receiving opening, so that the inner tube is inserted into the ball reinforcing layer from the receiving opening. The receiving opening may be a cross-shaped opening or a circular opening. According to an embodiment of the invention, the receiving opening is a cross-shaped opening. According to an embodiment of the invention, the receiving opening is preferably a circular opening.

[0025] According to one embodiment of the invention, the valve of the inner tube is aligned with the receiving opening of the ball reinforcing layer. The ball reinforcing layer is bonded to the inner tube at the receiving opening. The inner tube is made of rubber.

According to an embodiment of the present invention, there is provided a sports ball having, in order from the inside to the outside, a inner tube provided with a valve for filling air, a ball reinforcing layer surrounding the inner tube, and a plurality of pieces A skin layer composed of a skin sheet, wherein the inner tube and the ball reinforcing layer constitute a bladder of the sports ball, and the inner bladder is the inner bladder according to the present invention as described above.

According to an embodiment of the present invention, the skin layer is a skin layer of a pasting structure formed by directly attaching a skin sheet to a bag layer, and the skin layer may be coated on the bag layer and then the skin layer is pasted. Further, the skin layer may be a skin layer of a sewing machine stitching structure.

[0028] According to an embodiment of the present invention, the present invention provides a reinforcing layer for a sports ball, the reinforcing layer surrounding an inner tube provided with a valve for filling air, the reinforcing layer being a ball reinforcing layer; The ball reinforcing layer is made of a polyethylene material; the ball reinforcing layer passes Formed by molding or blow molding; the ball reinforcing layer may be cut to form a receiving opening, so that the inner tube is inserted into the ball reinforcing layer from the receiving opening; the valve of the inner tube is aligned with the circle The receiving opening of the ball reinforcing layer; the ball reinforcing layer is bonded to the inner tube at the receiving opening.

[0029] According to one embodiment of the present invention, there is provided a method of manufacturing a bladder for a sports ball, the inner tube provided with a valve for filling air, and a ball reinforcing layer surrounding the inner tube The ball reinforcing layer is sprayed by a plastic material, and the method comprises the following steps: First, forming a circular sphere by blow molding; and second, cutting the above round sphere with a cutter The third step is to insert the inner tube into the circular sphere through the receiving opening; the fourth step is to align the valve of the inner tube with the circular opening of the circular sphere; the fifth step is to close the receiving opening of the circular sphere .

[0030] In the inner ball and the sports ball of the above-mentioned sports ball, since the reinforcing layer can be made by simple molding or blow molding, the production efficiency is high, and after using the ball reinforcing layer, it is guaranteed In the case of the quality of the ball, the skin layer can be made of a relatively thinner material with a slightly lower quality, and therefore, the manufacturing cost of the sports ball will be effectively reduced. In addition, the sports ball made of the above liner is soft and feels good, and because of the complete spherical shape of the bladder itself, while maintaining the roundness of the sports ball, the ball control property when the sports ball is used is good. DRAWINGS

1 is a perspective view of a formed sport ball in accordance with the present invention.

2 is a schematic cross-sectional view taken along line A-A of FIG. 1 in accordance with the present invention. [0033] Figure 3 shows a schematic view of two semi-spherical balls sprayed to form a sphere.

4 is a schematic view of a receiving opening in accordance with the present invention.

Fig. 5 is a schematic view showing a state in which a ball reinforcing layer and a surface ball are joined according to the present invention.

6 is a schematic view showing a state in which a ball reinforcing layer according to the present invention is covered by a surface ball which has been sewn. detailed description

[0037] An embodiment for manufacturing a soccer ball will be given below based on the drawings. It is to be noted that the illustrated embodiment only describes the structure of the soccer ball, but the manufacturing method can of course be applied to the volleyball, handball, rugby, etc. Other sports balls of air structure.

[0038] In Figures 1-3, Figure 1 shows a perspective view of the formed sports ball; Figure 2 shows a cross-sectional view along line AA of Figure 1; Figure 3 shows the two semi-spherical balls after forming a ball schematic diagram.

[0039] As shown in Figures 1, 2 and 3, the ball reinforcing layer 1 is made of a plastic material or other material by a spray molding or molding process, and a part of the ball reinforcing layer 1 is cut to form a receiving opening. 4. The receiving port 4 is shown for housing the inner tube 10. A valve hole 3 is formed at the accommodating port 5. The valve hole 3 is used to pass the inflated needle through the valve 2 on the inner tube 10, and the circular hole in Fig. 3 shows a receiving port.

Here, the inner tube 10 is formed into a hollow spherical body by using an elastic material such as natural rubber or natural rubber or butyl rubber. As shown in Fig. 2, when the inner tube 10 is on the inner side of the ball reinforcing layer 1, it can be in close contact with the ball reinforcing layer 1 after it is filled with air.

[0041] Referring to the drawings, the ball reinforcing layer of Fig. 1 is produced in the following manner.

[0042] In the first step, a circular sphere is formed by blow molding; in the second step, the circular sphere is cut by a cutter into a receiving opening, for example, a circular opening, but the shape of the receiving opening is not limited thereto. For example, the intersection can be an intersection, a cross, a Y-shaped, etc.; in a preferred embodiment of the present invention, the receiving opening is a circular opening, and the diameter can be, for example, 5 mm; Inserting the circular ball through the receiving port; in the fourth step, aligning the valve of the inner tube with the circular opening of the circular ball; and in the fifth step, closing the receiving opening of the circular ball. In the case of using the cross-shaped accommodating port, when the accommodating port is closed, a valve hole is left at the position of the valve aligned with the inner tube.

[0043] Fig. 4 shows a method of closing the housing opening 4 in a sectional view. As shown in the figure, in general, the inner tube 10 is vulcanized and bonded to the top of the valve cover 13 with a valve cloth 12 for adhesion assistance.

[0044] After inserting the inner tube 10 into the ball reinforcing layer 1, the accommodating opening of the ball reinforcing layer is pasted on the valve cloth 12, and the valve hole 3 and the inner tube 10 reserved on the receiving port are Valve 2 is aligned. Then, the inner tube 10 is inserted into the ball reinforcing layer 1 in which the slit has been turned into the inner side, and the valve 2 of the inner tube 10 is exposed to the receiving opening 4, and then the following operations are performed:

(1) Applying an adhesive to the back surface of the periphery of the housing opening 4.

(2) Applying an adhesive to the surface of the valve cloth 12.

[0047] (3) bonding the valve cloth 12 to the back of the housing opening 4,

(4) When the valve hole 3 of the housing opening 5 is aligned with the valve 2 of the inner tube 10, the housing opening 4 of the ball reinforcing layer 1 is closed.

[0049] (5) The inner tube 10 and the combination of the ball reinforcing layer 1 are placed in a hollow ball mold of 60 to 70 ° C, and after the mold is closed, the inner tube 10 is used for 3-5 minutes. Fill with 9.0 to 10 kg/cm ² of compressed air.

[0050] Since the above-mentioned sphere reinforcing layer 1 can be completely fabricated by mechanical production in the manufacturing process, the production efficiency is extremely high, and the product quality is stable. At the same time, because the ball reinforcing layer is used instead of the traditional winding structure as the buffer layer of the inner tube 10, it is not only easy to manufacture, but also helps to reduce the manufacturing cost of the outer skin, and the external force is good, and can maintain good and true. Round, keeps it long lasting.

[0051] Moreover, the surface of the ball is smooth and has no unevenness, so the quality of the inner feel and appearance is good, and the athlete can control the ball well in the game.

As the binder described above, a latex or a neoprene-based binder, that is, a polyurethane-based binder can be used. The plastic material described above may include polyethylene, EVA (vinyl acetate copolymer), and the like. The diameter of the ball reinforcing layer of the soccer ball described above is preferably 212 mm. The thickness of the ball reinforcing layer described above is preferably 0.5-L0 mm.

Further, as can be seen from the above embodiment, the valve hole 3 and the accommodating port 4 are at the same position. Alternatively, the valve hole 3 and the accommodating port 4 may be formed at different positions.

[0054] The inner liner made by the above method is attached with the following skin layer to form a desired sports ball.

[0055] A leather ball 14 or other type of ball is disposed on the ball reinforcing layer 1. [0056] FIG. 5 illustrates an embodiment in which a leather ball 14 is disposed on the ball reinforcing layer 1, On the ball reinforcing layer 1, a leather ball 14 composed of a foam material 16 and artificial leather 15 (or natural leather) is bonded. Alternatively, the foam material 16 may be omitted and the artificial leather directly pasted on the sphere reinforcing layer 1.

5 is a direct attachment of the leather ball 14 to the ball reinforcing layer. The skin layer may also be adhered to the rubber-coated ball reinforcing layer as described in the background art.

Fig. 6 shows another embodiment in which a leather ball piece 14 which is sewn into a spherical shape by a sewing machine or the like is disposed on the ball reinforcing layer 1. The edges of the artificial leather 15 are folded inwardly and sewn with the sewing thread 8. At this time, since the ball reinforcing layer 1 has a function of reinforcing the bladder, the leather ball 14 does not have to be affixed with the backing material, and can be sewn by a sewing machine. In this case, the ball reinforcing layer 1 and the inner tube 10 are formed. The inner casing is inserted into a spherical leather ball, and the insertion method and the sealing method of the ball receiving opening are the same as the sealing method of the skin layer of the hand-sewn ball in the above background art, and will not be described here.

With this configuration, since an adhesive is not used, and an air layer exists between the leather ball 14 and the ball reinforcing layer 1, a softer touch can be obtained.

From the above, it can be seen that, according to the present invention, the accommodating port and the valve hole are substantially identical, and the accommodating port is bonded and fixed, and the sports ball is manufactured with the following characteristics:

[0061] (1) A spherical reinforcing layer is used.

(2) The seam or the mesh structure at the time of sewing, which is the main cause of the spherical shape, is not obstructed, and the surface of the inner surface of the sports ball which is very smooth without any unevenness is formed.

[0063] (3) All processes can be machined. Therefore, the produced ball has the following advantages: [0065] (1) The surface of the ball is soft, has a good touch, and has excellent control performance. [0066] (2) No shaking during flight, correct rolling and rebound, and excellent controllability of the fingers. [0067] (3) High production efficiency. [0068] (4) Quality (weight, size, roundness) is stable.

[0069] (5) Durable, the seam is not easy to crack.

[0070] The above embodiments are not intended to limit the invention, and the prior art is common. Modifications made by the skilled artisan without departing from the spirit and scope of the invention are within the scope of the protection.

Claims

Claim

A bladder for a sports ball, the bladder comprising an inner tube provided with a valve for filling air, and a reinforcing layer surrounding the inner tube, characterized in that:

The reinforcing layer is a sphere reinforcing layer.

The inner bladder of a sports ball according to claim 1, wherein the spherical reinforcing layer is made of a plastic material.

The inner bladder of a sports ball according to claim 2, wherein the spherical reinforcing layer is made of a polyethylene material.

4. The inner bladder of a sports ball according to claim 3, wherein the spherical reinforcing layer is formed by molding or blow molding.

The inner ball of the sports ball according to claim 4, wherein the ball reinforcing layer is cutable to form a receiving opening, so that the inner tube is inserted into the ball reinforcing layer from the receiving opening .

The inner bladder of a sports ball according to claim 5, wherein the receiving opening is a cross-shaped opening or a circular opening.

The inner bladder of a sports ball according to claim 6, wherein the receiving opening is a cross-shaped opening.

The inner bladder of a sports ball according to claim 5, wherein the valve of the inner tube is aligned with the receiving opening of the ball reinforcing layer.

The inner bladder of a sports ball according to claim 8, wherein the spherical reinforcing layer is bonded to the inner tube at the receiving opening.

10. A kind of sports ball, which has a sequence from the inside to the outside: a tire, a sphere reinforcing layer surrounding the inner tube, and a skin layer composed of a plurality of surface layers, wherein the inner tube and the ball reinforcing layer constitute a bladder of the sports ball, characterized in that The liner is a bladder according to any one of claims 1-9.

The sports ball according to claim 10, wherein the skin layer is a skin layer of a sticking structure formed by sticking a plurality of balls to a bag layer.

The sports ball according to claim 10, wherein the skin layer is a skin layer of a stitching structure in which a plurality of sheets are sewn by a sewing machine.

The sports ball according to claim 10, wherein the sports ball is a soccer ball.

A reinforcing layer for a sports ball, which surrounds a tube provided with a valve for filling air, characterized in that the reinforcing layer is a ball reinforcing layer.

The reinforcing layer according to claim 14, wherein the ball reinforcing layer is made of a polyethylene material.

The reinforcing layer according to claim 14, wherein the ball reinforcing layer is formed by molding or blow molding.

The reinforcing layer according to claim 14, wherein the ball reinforcing layer is cut to form a receiving opening, so that the inner tube is inserted into the ball reinforcing layer from the receiving opening.

The reinforcing layer according to claim 17, wherein the valve of the inner tube is aligned with the receiving opening of the ball reinforcing layer.

The reinforcing layer according to claim 18, wherein the ball reinforcing layer is bonded to the inner tube at the receiving opening.