JPH0731702A - Racket for table tennis - Google Patents

Abstract

(57) [Summary] [Purpose] The development of a table tennis racket that not only reduces the weight of the racket and improves the feel at impact, but also enhances the resilience of the ball. [Structure] Use of a laminated plate formed by laminating a thin wooden plate and a woven fiber sheet obtained by weaving a wholly aromatic polyester fiber and a carbon fiber.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a table tennis racket which has been developed to improve the feel at impact and the resilience of the ball and to improve the performance.

[0002]

2. Description of the Related Art A requirement for a table tennis racket is that the racket is the first to be lightweight. This weight reduction reduces the physical load on the player, and the racket is easy to swing and the racket can be used. The swinging speed of the robot is improved. The second requirement is to improve the resilience of the racket hitting portion, and the resilience of the hitting ball is increased by this resilience, so that a fast ball, that is, a fast hitting ball can be hit back. The third requirement is that the vibration at the time of hitting the ball does not crack in the hand to obtain an excellent shot feeling.

Various studies have been conducted in the industry to improve the performance of the above table tennis racket. For example, we have devised a combination of multiple types of thin plates, the thickness of each thin plate of each component, the bonding direction of each thin plate (for example, the fiber directions of the thin plates are orthogonal), and more recently, carbon fiber,
Various rackets in which polyamide fibers are laminated between wooden thin plates are known.

As a specific publicly known example, Japanese Patent Application Laid-Open No. 52-5
There are rackets for table tennis described in Japanese Patent No. 8629 and Japanese Patent Publication No. 52-15734, but the former racket structure has a structure in which at least the hitting portion of the racket body member is a laminate of a wood board and an aromatic polyamide fiber reinforcing layer. The board is made of wood, and the surface of the laminated board is made of wood.
In the latter racket structure, at least the hitting portion of the racket main body member is formed of a laminated plate of a wood board and a carbon fiber reinforcing layer, and the surface of the laminated board is formed of a wood board.

[0005]

However, in the above-mentioned known racket structure for table tennis, the first and second requirements are satisfied by reducing the weight of the racket itself and maintaining the elasticity of the racket hitting portion. Although it was almost satisfied, the third requirement was not satisfied. In other words, the known table tennis racket has a problem that the shot feeling is hard and the player does not like it.

Therefore, in order to solve this problem, the main body member (blade) of the table tennis racket is a table tennis racket formed by laminating one or a plurality of wholly aromatic polyester fiber sheets on a thin wooden plate. Regarding the above, the present inventor has already filed an application. However, in such a table tennis racket as the prior art, the one having carbon fiber laminated has a too hard shot feeling, and the one having wholly aromatic polyester fiber laminated has a softer shot feeling, but on the other hand, , There was a tendency that the resilience at the time of hitting the ball was insufficient.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above, and improves the shot feeling while keeping the racket lightweight and the shot feeling sufficiently, and is easy for the player to use. Is to provide a racket for.

That is, the present invention is a laminated board in which a racket main body member (blade) for table tennis is a thin wooden board and one or a plurality of interwoven fiber sheets of wholly aromatic polyester fibers and carbon fibers (carbon fibers) are laminated. It is composed.

Therefore, a ping-pong racket formed by laminating a thin wooden board with the above-mentioned mixed woven sheet is a racket which is fast in vibration damping due to the wholly aromatic polyester fibers contained in the mixed woven sheet, and is less likely to cause cracks in the hand. By using carbon fiber with even higher elasticity, it is possible to obtain a table tennis racket that is soft to the hand and has a soft feel at impact while having strong repulsion.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail based on the embodiments shown in the drawings.

Reference numeral 1 denotes a table tennis racket. The table tennis racket 1 includes a racket body member 4 composed of a ball striking portion 2 and a grip portion 3, and a grip 5 attached to both front and back surfaces of the grip portion 3. A rubber 6 is attached to both the front and back surfaces of the hitting portion 2 as needed.

The present invention is characterized by the structure of the racket body member 4 described above, and in the structural embodiment of the racket body portion 4 shown in FIGS. A laminate in which a fiber sheet 8 formed by interweaving a wholly aromatic polyester fiber and a carbon fiber is pasted on both front and back surfaces of a wooden board 7, and a wooden thin board 9 is pasted on the surface of the interwoven fiber sheet 8. It is a structure.

In the above embodiment, as shown in FIG. 5 (A), the racket main body 4 has a cross-sectional structure in which the wooden board 7 in the central portion is used as the core material and the interwoven fiber sheets 8 are attached to both front and back surfaces thereof. The wood thin plate 9 is attached to the surfaces of both the sheets 8 but is not limited to this. For example, as shown in FIG. A sheet 8 is attached, and a thin wooden plate 9 is attached to the surface of the sheet 8.
May be attached. Further, as shown in FIG. 5 (C), the object of the present invention can be obtained even if a laminated plate structure is formed by alternately laminating four wooden thin plates 9 and three interwoven fiber sheets 8.

As described above, by using the plywood having the laminated structure of the wood board and the woven sheet of the wholly aromatic polyester fiber and the carbon fiber as the racket main body member for table tennis, the good hit feeling which is the initial purpose and the high feeling of hitting are achieved. A racket for table tennis can be obtained that provides repulsion.

By the way, the results shown in the following table were obtained by comparing the material performances of the wholly aromatic polyester fiber sheet A only, the carbon fiber sheet B only, and the interwoven fiber sheet C of the wholly aromatic polyester fibers A and B. And a flexure (initial amplitude) of a racket using the above-mentioned interwoven fiber sheet C,
The good balance of the hand crack (vibration damping time) is shown.

[0016]

[Table 1]

[0017]

As described above, according to the present invention, the main body member of the table tennis racket is formed by laminating one or a plurality of wooden thin plates and a fiber sheet formed by weaving fully aromatic polyester fibers and carbon fibers. Since it is a table tennis racket formed of laminated plates, this makes it possible to take advantage of the weight reduction and high repulsion force of carbon fiber while providing a soft and good "hit feeling" that is not possible with them. That is, due to the characteristics of the wholly aromatic polyester fiber, the elasticity of the racket body is improved, and the vibration damping property is remarkably improved, and there is an effect that the feel at impact is soft and does not resonate with the hand.

[Brief description of drawings]

FIG. 1 is an explanatory view of the shape of the entire racket.

FIG. 2 is a side view of the racket according to the embodiment of the present invention.

FIG. 3 is an enlarged view of part A in FIG.

FIG. 4 is an explanatory diagram of a racket configuration according to an embodiment of the present invention.

5 (B) and 5 (c) are cross-sectional explanatory views showing another embodiment of the present invention.

[Explanation of symbols]

1 ... Table tennis racket 2 ... Ball hitting part 3 ... Grip part 4 ... Racket body member 5 ... Grip 6 ... Rubber 7 ... Wood board 8 ... Mixed woven fiber sheet 9 ... Wood thin board

Claims (1)

[Claims] 1. A main body member of a table tennis racket is formed of a laminated plate formed by laminating one or a plurality of thin wooden plates and a fiber sheet formed by interweaving wholly aromatic polyester fibers and carbon fibers. A racket for table tennis.