JPS63285Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a ball for a ball game, such as a volleyball or a basketball ball, which is a hollow body and has a structure in which air is injected into the inside through an air injection valve.

Prior Art Figures 1A and 1B show the structure of a part of an air injection valve 1 in a typical conventional example. Air injection hole 3
A circular end face 4 having a shape is exposed on the outer surface of the tube 2,
It extends to the vicinity of the ball surface via the thread wound layer 5 and the middle layer 6 made of rubber. Reference numeral 7 denotes an outer skin made of natural leather, synthetic leather, or rubber that is adhered onto the middle layer 6. Normally, this skin 7 has an opening 8 of approximately the same shape as the circular end surface 4 of the bulb 1, and the circular end surface 4 has a structure exposed to the outer surface of the ball. In general, this valve 1 is harder than other parts around it, such as the epidermis 7, so especially in the case of volleyball, this part strongly hits the hands, wrists, and fingers when serving, receiving, or spiking, giving the player a sense of discomfort or shock. Not only does it cause pain, but it also often causes pain. In order to deal with this situation, a structure as shown in FIG. This valve 1 is covered with a wound layer 5, a middle layer 6, and a skin 7, and an opening 9 approximately equal to the air injection hole 3 is formed in the upper layer of the valve. With such a configuration, the end face of the valve 1 is certainly coated,
This no longer comes into direct contact with the hands, etc., and the discomfort, impact, pain, etc. given to the player is suppressed, but on the other hand, a new problem arises in that it becomes difficult to replace the valve 1. That is, the valve 1 is more susceptible to deterioration than the materials of other parts, and therefore air often leaks from this part, causing a significant decrease in the durability of the ball. Therefore, in reality, there are many balls that can be used sufficiently just by replacing the valve 1. Further, even if there is a defect in the valve 1 during the manufacturing process, if it can be replaced, the manufacturing yield will be significantly improved.

Purpose of the invention This invention was created in view of the above-mentioned circumstances, and is a ball game in which the valve is covered with a coating layer to soften the impact caused by the valve part when the ball collides with the ball, and at the same time, it also makes it possible to replace the valve. The ball is provided for use in sports.

Structure of the invention The ball game ball according to the invention includes a covering layer such as a skin covering a rubber tube including a valve, and one or more notches formed on the upper part of the circular end face of the covering layer. Main component. Another main component of the present invention is that the end of the notch is substantially aligned above the outer periphery of the circular end face of the valve.

Embodiment Figures 3A and 3B show an embodiment of the present invention, in which 1 is an air injection valve, which is adhesively fixed to the inner surface of a rubber tube 2 made of butyl rubber with butyl glue, or is integrally molded with the rubber tube 2. It is buried in the fixed part 1'. A circular end face 4 of this bulb 1 is exposed to the outside of the rubber tube 2. 3 is an air injection needle hole bored in the center of the circular end surface 4. The valve 1 is normally fixed to the tube 2 by fitting the ring-shaped protrusion 10 into a ring-shaped groove 11 formed on the valve fixing portion 1' side. In this case, no adhesive is used between the valve 1 and the valve fixing part 1', and the two are only tightly pressed together. Therefore, the valve 1 can be attached by forcefully pushing it into the valve attachment hole 12 of the valve fixing part 1', and on the other hand, it is also possible to pull it out from there. Reference numeral 5 denotes a thread wound layer for regulating and reinforcing the ball, and reference numeral 6 represents a rubber intermediate layer formed on the thread wound layer 5, which acts to impart elasticity to the ball. 7 is an outer skin made of natural leather, synthetic leather, or a rubber layer. This skin 7 acts as a covering layer for the bulb 1 and covers the bulb circular end face 4. 1
Reference numeral 3 denotes a notch formed in the upper part of the bulb circular end face 4 in the skin 7, and is provided in a straight line.
This notch 13 passes above the air injection hole 3, and its end is configured to approximately match the outer circumference of the circular end 4, so that air can be injected, and the valve 1 can be removed or inserted. It becomes possible. In addition, minute circular openings are provided at both ends of the notch 13 as shown in the figure, thereby regulating the length of the notch 13 and protecting the skin from being easily torn. Incidentally, the skin 7 in Figure B shows a necessary part of a piece of leather for a volleyball.

FIG. 4 shows a modification of the notch 13', in which the notches are formed radially around the air injection hole 3, and each end is connected to the end of the valve circular end face 4, as described above. matches.

Here, the structure in which the ends of the notches 13 and 13' are made to substantially coincide with the end of the circular end face 4 of the valve is because
This is to enable the valve 1 to be pulled out or inserted, and if the skin 7 is made of an elastic material such as rubber, the outer ends of the notches 13, 13' should be aligned with the circular end face 4.
It is also possible to provide it slightly inside the outer periphery.

Effects of the invention According to the invention, since the relatively hard air injection valve is covered with the epidermis, there is no discomfort or impact when the valve part touches or strongly contacts the player's body. It can be relaxed and provide an even tactile sensation from the entire surface of the ball. Furthermore, according to the present invention, it is possible to easily inject air and replace the valve through the notch provided in the skin, so the ball can be easily repaired. Considering that the valve portion normally deteriorates more quickly than other portions and is more likely to cause air leakage, this structure has a large effect in contributing to improving the durability of the ball. Furthermore, even during the manufacturing process, defective valves can be easily replaced, which is effective in improving product yield.

[Brief explanation of the drawing]

FIG. 1A is a sectional view of the main part of a conventional example, B is a front view thereof, and FIG. 2A is a sectional view of the main part of another conventional example.
3B is a front view of the same, FIG. 3A is a sectional view of a main part of an embodiment of the present invention, B is a front view of the same, and FIG. 4 is a modification of the notch in an embodiment of the present invention. FIG. 1... Valve, 1'... Valve fixing part, 2...
Rubber tube, 4... Circular end surface, 7... Skin, 8
...Opening, 13, 13'...Notch.

Claims (1)

[Claims for Utility Model Registration] (1) A rubber tube into which air is injected to maintain a constant internal pressure, a valve fixed to the rubber tube and having an exposed circular end face with an air injection hole on the outside of the tube, and the valve. A covering layer such as a skin that covers the tube, the covering layer having one or more notches formed on the upper part of the circular end surface of the valve, through which the rubber tube can be inserted into the rubber tube. A ball game ball that allows air to be injected and the valve mentioned above to be replaced. (2) The ball game ball according to claim 1, wherein the end of the notch substantially coincides with the upper part of the outer periphery of the circular end surface of the bulb.