WO2008029487A1

WO2008029487A1 - Pneumatic pressure indicating element for ball for ball game filled with air and ball for ball game equipped with pneumatic pressure indicating element

Info

Publication number: WO2008029487A1
Application number: PCT/JP2006/318230
Authority: WO
Inventors: Hideomi Shishido
Original assignee: Hideomi Shishido
Priority date: 2006-09-07
Filing date: 2006-09-07
Publication date: 2008-03-13

Abstract

A pressure measurement element for a ball for a ball game which exhibits durability with simple structure without sacrificing the performance of the ball for a ball game. The pneumatic pressure indicating element for a ball for a ball game filled with air comprises a measuring means arranged at a position opposing an air injection valve of the ball for a ball game filled with air including a tube formed of an elastic body of hollow spherical shape and filled with compressed air and a skin layer formed on the outer circumference thereof and measuring the internal pressure of air filled in the tube, and a means for indicating the measurements from the measuring means. A ball for a ball game equipped with this element is also provided.

Description

Description Pneumatic display element for air-filled ball game pole and ball game ball with Piko air pressure display element Technical Field

The present invention relates to an air pressure display element for an air-filled ball game pole and a ball game pole equipped with the air pressure display element. Background art

Conventional ball sports pouches, such as soccer poles, parade poles, basketball poles, and handballs, are used by injecting compressed air into the tube made of air-impermeable material such as butyl rubber and natural latex rubber through pulp provided in the tube. The

For example, in the case of hand-stitched poles, these balls have a structure in which the tube is covered with reinforcing panels that are sewn inside, and in the case of a bonded ball, a reinforcing layer is formed by winding nylon filament on the tube. The tube is covered so that compressed air can be held inside the tube, and the skin panel is bonded and fixed to the reinforcing layer with an adhesive.

In this type of ball game pole, a so-called hand-sewn pole is called a pole.

(U.S. Pat. No. 4 3 3 3 6 4 8, Patent Document 1) and a ball called a pasted ball (Japanese Patent Laid-Open No. 9 1 9 5 1 6, Patent Document 2) It has been known.

In hand-sewn balls, the tube is covered with a panel where the edges of each side are stitched together. The panel is a laminate of artificial leather and 3 to 4 cotton / polyester blended fabric (called backing) bonded together with natural latex, and cut into an appropriate size and shape. Although not described in this document, The purpose of eliminating the unbalance due to the normal valve weight, that is, in order to make the center of gravity of the pole coincide with the ball center, products with counterbalance of approximately the same weight as the valve are added to the part of the tube facing the pulp. Yes (it does not sense pressure).

On the other hand, the laminated pole is composed of a reinforcing layer in which a nylon filament is wound around the tube by several thousand meters. The tube is provided with pulp, and compressed air is injected through the pulp. A skin panel made of natural leather or artificial leather cut into an appropriate shape and size with an adhesive such as latex or chloroprene rubber is applied on the reinforcing layer.

In the case of a rubber pole with a laminated structure, the rubber is vulcanized and bonded without using an adhesive instead of attaching the skin panel.

In these air-filled ball game poles, there is a close relationship between the air pressure and the resilience. For example, in a soccer ball, a pole using a high pneumatic force flies well and the rebound is high. And the impact at the time of a kick ball is big, and it feels hard and painful. On the other hand, when used at low pressure, the flight distance is reduced, the rebound is lowered, the impact is low, and it feels soft. Therefore, the recommended working pressure is determined for each ball sport and is printed around the pole pulp. For example, it is 1.0 bar for soccer poles and 0.3 2 5 kg ⁷ cm ² for non-pole poles. These air pressures are usually measured by a semiconductor sensor or ball pressure gauge using a Purdon tube. However, these pressure gauges are specially developed and commercialized for balls. They are extremely expensive and are for professionals such as referees. It is not possible. Some experts, such as referees, can judge the pressure with a certain degree of accuracy from the sense of pressing with their hands, but considerable experience is required.

Unlike games, it is not necessary to adjust the air pressure strictly for practice or leisure. However, in order to become proficient in the skill or to fully enjoy the ball game, it is not strictly used at a pressure close to the recommended value in the competition, or at least at present Knowing the pressure used is extremely useful. However, non-professional pole users do not have a means to measure air pressure and do not have sufficient experience. The actual situation is that it is injected and used far from the appropriate value. For this reason, proficiency in ball technology is slow, or interest in play has been reduced.

The conventional poles disclosed in Patent Documents 1 and 2 do not have a function of sensing pressure and displaying it. Therefore, in order to know the pressure, it is necessary to insert a ball pressure gauge composed of an injection needle and a pressure sensor or a Prudon tube into the pulp and read the indicated value. Ball pressure gauges are not only expensive for special applications, but also difficult to obtain in general. Moreover, it is not only troublesome to insert the pressure gauge injection needle into the pulp, but the injection needle often damages the pulp or frequently leaks air during the insertion operation. As a method of solving this problem, it is conceivable to provide an electronic element consisting of a semiconductor pressure sensor and a liquid crystal display on the tube, but it is not only expensive, but also suitable for balls that are subject to frequent impacts. Absent. Disclosure of the invention

The present invention has been made in view of the present situation, and a pressure sensing element and a pressure display element having a simple structure and durability can be provided without using electronic parts or precision mechanical parts sensitive to impacts. It is provided inside the ball to eliminate the conventional problems. That is, in the present invention, by providing an element for detecting and displaying the air pressure inside the pole, the pressure is displayed by the ball itself, and the proper pressure can be obtained without using a special pressure gauge. An understandable pole is realized.

The present invention (Claim 1) is an air-sealed type comprising a tube formed of a hollow sphere elastic body having a stretchability and sealed with compressed air, and a skin layer formed on the outer periphery of the tube An air pressure display element for a ball for ball games, the display element comprising: a measuring means for measuring an internal air pressure of the tube; and the measurement Display means for displaying the measurement results of the means.

In the present invention (claim 2), the measuring means transmits the displacement of the pressure sensitive means to the display means outside the pressure sensitive means and the pressure sensitive means that deforms according to the internal pressure of the tube. It can be configured to include a transmission means.

In the present invention (Claim 3), the pressure-sensitive means can be constituted by a part of the tube.

In the present invention (Claim 4), the air pressure display element includes a holder made of an elastic body integrally molded with the tube, together with the transmission means, and the pressure-sensitive means. A part of the holder can be used.

In the present invention (claim 5), the transmission means includes a pressure plate interlocked with the pressure-sensitive means, and a rack and pinion mechanism connected to the pressure plate, and the display means includes the rack and pinion mechanism. It can be configured to include a display that is connected to the pinion and displays the amount of rotation.

In the present invention (claim 6), the U transfer means is a pressure plate interlocked with the pressure sensing means, a displacement par connected to the pressure plate, and a displacement of the displacement bar. It can be configured to have a display that displays the amount of rotation after converting to

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a ball game pole in which the air pressure display element is disposed at a position facing the ball center of the ball.

FIG. 1 is a cross-sectional view showing the structure appearance of a ball game pole according to an embodiment of the present invention, and FIG. 2 shows the structure of the pneumatic display element and the ball game ball according to the embodiment of the present invention. Fig. 3 is a cross-sectional view showing the installation method in detail. Fig. 3 is a plan view of the air pressure display element attached to the ball as viewed from above the pole. FIG. 5 is a side view showing another embodiment of a displacement conversion mechanism using a lever, and FIG. 5 is a cross-sectional view showing the structural appearance of a ball game pole tube according to another embodiment of the present invention. The figure is a cross-sectional view showing in detail the structure of a pneumatic display element according to another embodiment of the present invention and a method of installing it on a ball game pole. BEST MODE FOR CARRYING OUT THE INVENTION

FIG. 1 shows a cross section of an embodiment in which a pneumatic display element according to the present invention is attached between a hand-sewn soccer ball tube and a skin panel. Tube 1 2 is required to have an appropriate re-powder and air retention, so it is rich in elasticity with a breaking elongation of 200% or more, such as butyl rubber, natural rubber, latex rubber Λ or thermoplastic urethane. It is a hollow material made of rubber or film having excellent air impermeability, and compressed air is enclosed therein. Its thickness is from 0.2 mm to 2 mm.

The skin panel 1 3 is usually l m n! Appropriate shape and dimensions: 3 to 4 cotton and polyester blended fabrics are bonded together with natural latex on the back of the skin of artificial leather of ~ 2.5 mm for reinforcement (the backing material is called packing) It is cut by. The skin panel 13 is shown in a simplified view in FIG. 1, but in actuality, for example, in the case of a single ball, it is sewn together with 20 hexagons and 2 pentagons. Specifically, for the skin panel 1 3, the end faces of the panels are sewn together from the back, leaving 4 sides, and then turned upside down using the opening, and then the tube 1 2 is inserted and the opening is sewn together. Closed and made spherical.

A pulp holder 14 made of butyl rubber or the like is attached to the tube 12 by an adhesive or a vulcanization adhesive method, and compressed air is injected through the pulp 15 5 press-fitted into the pulp holder 14. Is done. The pulp holder 14 is manufactured using a molding die using substantially the same material as the cup 12.

The air pressure display element 1 has a hole (display window 1 6) made in one of the skin panels 1 3 in advance before the above-mentioned sewing, and is adhered and fixed to the back side. Stitched together. From the viewpoint of balance, it is desirable that the position be opposite the pulp holder 14 and the ball center. In other words, it can also function as a counter balance. As a result, the air pressure display element 1 is pressed against the skin panel 13 by the air pressure sealed in the tube 12. Since the skin panel 1 3 is captured by the packing, it will withstand this pressure and keep its spherical shape. A display window 16 is opened on the skin panel 13 to which the pneumatic display element 1 is attached, and the inside of the element can be observed through the window.

Details of the pressure display element will be described with reference to FIG. The housing of the pneumatic display element 1 is composed of a cylindrical body consisting of a thin film holder 9 and a transparent force par 11 1, whose outer diameter is 10 to 3 O mm and height is 15 to 30 mm. Can do. The thin film holder 9 is made of hard plastic such as acrylic resin, polycarbonate, or urethane resin.

The transparent cover 1 1 is a cylindrical body having a flange, the outer diameter of the cylindrical body is 10 to 20 mm, transparent for the purpose of seeing through the inside through a force par, and soft with a JISA hardness of 70 to 90 In addition, it is made of a material excellent in scratch resistance that is hardly damaged by pebbles. It is also possible to provide a magnifier function by molding a convex lens on the top of the transparent cap. A suitable material for this is a thermoplastic urethane resin, which is made by a resin molding method. The impact on the human body is reduced by using soft materials.

The transparent force par 1 1 and the thin film holder 9 are bonded by thermocompression bonding or urethane adhesive by high frequency processing, but some unbonded parts are secured and the inside of the thin film holder 9 is kept at atmospheric pressure. Yes. The size of the housing is almost the same as that of the pulp holder, which does not impair the ball performance, and conversely maintains the weight balance.

A thin disc-shaped pressure plate 3 made of plastic is disposed at the bottom of the thin film holder 9 and is in contact with the tube 12. As described above, the tube 12 is a thin and highly stretchable material. It is located in a state where it is pressed against the skin panel 1 3 by the air pressure (arrow a), and it is positioned around the air pressure display element 1 along its outer wall. Here, a part of the tube 12 in contact with the pressure plate 3 acts as a pressure sensing means. A part of this tube 1 2 is called a pressure sensitive thin film 2. This pressure-sensitive thin film 2 may be the same thickness as tube 12 but can be designed to be thinner (sensitivity improved) or thicker (sensitivity decreased) than the surrounding area to adjust the measurement sensitivity.

In the present embodiment, when air is pressed into the tube 12 (the pressure is set to pkg / cm ² ), the pressure plate 3 (the area of which is defined as S in the pressure-sensitive portion) due to the pressure difference from the atmospheric pressure. P = S pkg force is applied to (cm ² ), and the pressure-sensitive thin film 2 undergoes displacement (the displacement is assumed to be X) and compresses the compression panel 8 (its panel constant is k). The compressed state is indicated by a broken line.

The maximum value of this displacement is determined by the depth H of the thin film holder 9 and can be 5 mm to 15 mm. Therefore, the elongation rate of the pressure-sensitive thin film 2 generated at the maximum displacement is several tens of percent, which is 1/10 to 1/5 of the breaking elongation rate of the tube 12. Therefore, the tube 12 does not burst. . In addition, since the pressure in the tube 12 does not change by these, the function as a ball does not change.

In parts other than the pneumatic display element 1, there is no such partial expansion / contraction displacement of the tube 12. This is because there is no space on the surface of the tube 12 that is directly exposed to atmospheric pressure as secured by the thin film holder 9.

Here, the relationship S p = k x holds. Since S and k are known constants, with displacement X the air pressure can be measured with: = k X Z S A general metallic panel material can be used as the compression panel 8, but a plastic panel or a non-magnetic material such as SUS 3 16 is desirable. The reason is to avoid malfunction in the meter reading machine in the shipping inspection. The coil diameter of the compression panel 8 is 0.5 mn! ~ 1.5 mm can be used.

The vertical displacement of the pressure plate 3 is attached to the rack 4 installed at the center of the pressure plate 3 and the rotating shaft 10 fixed between the transparent cover 1 1 and the thin film holder 9. It is converted into a rotational displacement by the turned pion 5. (In other words, the rack 4 moves to the pressure plate 3 and is displaced in the direction of the arrow b as the pressure increases, and this displacement is converted into the rotational movement of the pinion 5. Such a rack pieon mechanism is well known. The linear / rotational conversion mechanism is made of plastic material and is inexpensively injection-molded The pressure plate 3, rack 4, and pinion 5 mechanism constitute the transmission means.

Here, the conversion magnification K can be expressed as K = Z b / Za when the number of teeth of rack 4 and pinion 5 is Z a (the number of teeth corresponding to a circular gear) and Z b, respectively. For example, if Z a = 7 and Z b = 2 1, a rotational displacement of 3 times the vertical displacement of rack 4 is obtained. In other words, the displacement of the pressure sensitive thin film 2 can be increased three times. A display bar 6 is fixed to the rotation axis 10 of the pione 5 and rotates as indicated by an arrow c in the drawing according to the rotation of the pinion 5.

As shown in FIG. 3, a semi-cylindrical pressure display collar plate 7 is disposed in the display window 16 and is fixed between a thin film holder 9 and a transparent cover 11. This pressure display color plate 7 displays the appropriate pressure range for each ball game by color.

The transparent force par 1 1 has a collar, which is glued and fixed to the collar side of the display window 16 opened in the skin panel 1 3 and pressed against the skin panel 1 3 by the tube 1 2. It will not fall off due to the impact of time. In addition, since the surface is shielded by transparent power par 1 1 1, there is no possibility of sand or water intrusion. Furthermore, since the transparent power 11 is made of a soft and scratch-resistant material, it does not damage the human body and is not damaged by pebbles or the like.

With such a configuration, the player can observe the indication value of the display part 6 from the ball surface. By adopting such a configuration, even an inexperienced beginner can easily grasp the appropriate air pressure.

In the above embodiment, a rack and a pinion are used as the transmission means, but other displacement conversion mechanisms can be used. For example, as shown in FIG. 4, a so-called insulator machine that displaces the other end of the display bar 6 attached to the rotary shaft 10 with a displacement par 18. The display bar 6 can be enlarged and displaced depending on the structure.

In the above configuration, using a pressure plate 3 with a diameter of 12 mm and SUS 3 16 with a wire diameter of 1.0 mm, a compression panel 8 with a panel constant k = 2. 26 kg Z mm is manufactured to produce a pneumatic display element. As shown in Fig. 1, it was installed between skin panel 1 3 and tube 1 2. Here, when air was injected through pulp 15 and the displacement of rack 4 at each pressure was measured, the displacement relative to p = 0.4, 0.7, 1. O kg / cm ² x = l. 5, 3, 5 mm were obtained. On the other hand, when the rack and pinion conversion mechanism is used and each pressure is displayed using the display par 6 having a rotation radius of 7 mm, about 30 and 60 for each of the above pressures. , 90 degree rotational displacement was obtained and well recognized.

The total weight of the air pressure display element could also be 15 g. Since this value is roughly equivalent to the combined weight of the pulp house and the valve, not only does it impair the pole function, but it can also be understood that it functions as a counter balance.

In the above embodiment, an example of application to a hand-sewn ball has been shown. However, as shown in FIG. 5, a structure in which the ball is directly installed in a tube 12 is desirable for a bonded ball. In this embodiment, the air pressure display element 1 is directly attached to the inside of the tube 12 facing the pulp 15 and the valve holder 14.

This embodiment will be described in detail with reference to FIG. The size, shape, and weight of the air pressure display element 1 are substantially the same as those of the air pressure display element 1 of the previous embodiment shown in FIG. 2, but there are slight differences in attaching to the tube.

The element holder 17 corresponding to the above-mentioned thin film holder 9 has a cap shape with a collar, and is vulcanized or bonded to the inside of the tube 12 facing the pulp holder 14 similarly to the valve holder 14. Attached. The cylindrical part can have an outer diameter of 10 to 30 mm, an inner diameter of 10 to 20 mm, and a height of 15 to 30 nim. The manufacturing method of the element holder 17 is the same as that of the pulp holder 14. The same material as tube material such as butyl rubber can be used. wear. The bottom of the element holder 17 (cap-shaped top) is a thin film with a thickness of 0.2 to 2 mm, and its periphery is integrated with the element holder 17 body. This thin film portion acts as a pressure sensitive means, that is, a pressure sensitive thin film 2. .

A clamp groove 2 2 is provided in the upper part of the element holder 17, and the transparent force par 1 1 and the base 19 are fixed thereby. This fixing method is a fastening method using the well-known valve holder and the elasticity of rubber similar to pulp. Therefore, the transparency force par 1 1 and the base 1 9 need not be bonded in principle. By this measure, the other members are placed and fixed as in Fig. 2.

Affixing balls consist of several thousand meters of nylon filament wound around the tube 12 or two or more pieces of a specific shape such as strips are bonded or stitched together in a spherical shape with a latex cocoon adhesive. A spherical shell-shaped reinforcing layer 20 is disposed. The reinforcing layer 20 plays a role of maintaining the shape and dimensions against the impact of the injected air and kick. Therefore, unlike the previous embodiment, there is no need to attach the packing to the back surface of the outer skin 21, and the outer skin 21 is attached to the reinforcing layer 20 with an adhesive directly or via a rubber layer for increasing adhesive strength. It is done.

As the material of the skin 21, a well-known artificial leather, natural leather, and a laminate of foam materials such as TPU and EVA are used, and the thickness thereof is l to 4 mm. In addition, 20 hexagons and 12 pentagons are commonly used for soccer balls, and 12 or 18 approximately strips are often used for valley poles. As the adhesive, chloroprene rubber, natural or synthetic latex is used. A display window 16 corresponding to the transparent power par 1 1 is opened in the air pressure display element 1 corresponding part of the skin 2 1. Here, since the transparency par 1 1 is already fixed to the element holder 17, it is not necessary to adhere to the skin 2 1.

According to such a configuration, the inside of the tube 12 becomes a sealed space, and the inside of the air pressure display element 1 has the same atmospheric pressure as the outside of the pole. Therefore, when air is injected into the tube 12 through the pulp 15, the pressure-sensitive thin film 2 at the bottom of the element holder 17 acts as a part of the tube 12 and receives air pressure. Pressure sensitivity Since the thin film 2 is made of a material having high elasticity like the tube 1 2, it is displaced according to the pressure. The maximum displacement is determined by the depth H of the element holder 17 and can be 15 to 3 O mm. Since this value is within the allowable range of expansion and contraction of the pressure sensitive thin film material, it does not burst. In addition, the cylindrical part of the element holder 17 is designed as a thick part with a thickness of 5 mm or more, so that it is not deformed by the enclosed air pressure, and only the pressure sensitive thin film 2 is displaced. Accordingly, the air pressure can be displayed on the display bar 6 through the pressure plate 3, the compression panel 8, and the displacement conversion mechanism as in the previous embodiment.

According to the present invention, the pressure is always displayed on the ball by providing the air pressure display element at the portion of the tube facing the pulp holder and displaying the internal pressure of the tube with the display means. Therefore, there is no trouble of inserting the pressure gauge, and the pulp is not damaged by the injection needle. Further, since the pneumatic display element is composed of an elastic body such as rubber and a simple and strong part, it is excellent in durability and can be manufactured at low cost.

Claims

Scope of claim: Air-sealed ball game ball including a tube formed of a hollow spherical elastic body having compressed air and a skin layer formed on the outer periphery of the tube An air pressure display element for measuring, comprising: a measuring means for measuring the sealed air pressure in the tube; and a display means for displaying a measurement result by the measuring means. Air pressure display element for air-sealed ball game pole.

The measuring means includes a pressure-sensitive means that deforms according to an internal pressure of the tube, and a transmission means that transmits the displacement of the pressure-sensitive means to the display means outside the pressure-sensitive means. A pneumatic display element for an air-sealed ball game pole according to claim 1.

[Claim 3] The air pressure display element for an air-filled ball game ball according to claim 2, wherein the pressure-sensitive means is constituted by a part of the tube.

The air pressure display element houses the transmission means and includes a holder made of an elastic body integrally formed with the tube, and the pressure sensitive means is constituted by a part of the holder. The air pressure display element for an air-filled ball game ball according to claim 2, characterized by the above-mentioned.

The transmission means includes a pressure plate interlocking with the pressure sensing means, and a rack and pinion mechanism connected to the pressure plate, and the display means is connected to a pinion of the rack and pinion mechanism and the amount of rotation is indicated. The pneumatic display element for an air-filled ball game ball according to any one of claims 2 to 4, characterized by comprising a display body for displaying.

The transmission means includes a pressure plate interlocked with the pressure sensing means, a displacement par connected to the pressure plate, and the displacement of the displacement par is converted into a rotational movement and rotated. 5. An air pressure display element for an air-filled ball game pole according to any one of claims 2 to 4, wherein the air pressure display element comprises a display body for displaying a quantity.

A ball game pole in which the air pressure display element according to any one of claims 1 to 6 is disposed at a position opposite to the air-injecting pulp with the ball center of the ball interposed therebetween.