JPH09313657A - Golf club grip - Google Patents

Abstract

(57) [Abstract] [Problem] To increase torsional rigidity. SOLUTION: A layer 3 in which non-stretchable fiber bundles or threads are inclined with respect to the axial direction of the grip 1 and cross-arranged in different directions is embedded and reinforced in the thick elastic body 2.

Description

Detailed Description of the Invention

[0001]

The present invention relates to a golf club grip.

[0002]

2. Description of the Related Art Conventional grips for golf clubs are formed entirely of soft rubber or have a thread having a hygroscopic property such as cotton on the outer surface in order to suppress slippage due to sweating of a golfer during play. It is known that the grip is disposed so as to be exposed on the surface by being tilted in the axial direction or slightly inclined with respect to the axial direction.

[0003]

In order to improve the directional stability of the hit ball, it is necessary to reduce the twist of the shaft of the golf club. Particularly, fiber reinforced such as carbon fiber, which has been popularized in recent years as a lightweight shaft. Various structures have been proposed for resin shafts to minimize twisting, but the grips that grip the shafts have only countermeasures against anti-slip during swings and prevent twisting. Has little consideration. Since the golf club functions through the grip, when suppressing the twist of the club, even if the twist of the shaft is reduced, the twist of the grip must be reduced.
It is not effective because it works with the sum of both.

Therefore, the present invention has been made in view of the above problems, and an object thereof is to provide a grip having a structure with a small twist.

[0005]

In order to achieve the above-mentioned object, the present invention is a cylindrical grip made of rubber or a rubber-like elastic body and having a predetermined wall thickness, gripping a non-stretchable fiber bundle or thread. A layer which is inclined with respect to the axial direction of and is arranged in a crossed manner in different directions is embedded and reinforced inside the thick elastic body.

[0006]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

In the half sectional view shown in FIG. 1, a grip 1 for a golf club has a rubber-like elastic body 2 such as rubber or urethane.
Which is a cylindrical body having a predetermined wall thickness, in which a bundle or thread of non-stretchable fibers is inclined with respect to the axial direction of the grip 1 and the layer 3 is arranged in a cross direction in different directions.
It is buried and reinforced inside.

In FIG. 1, in the grip 1, a shaft (not shown) is inserted at a rear end dead end from a front end portion 1A on the head (not shown) side of the club toward a rear end portion 1B on the grip end side. It has a lumen 4. Radius r of lumen 4
In this embodiment, the diameter is substantially the same from the front end 1A to the rear end 1B of the grip 1. Elastic body 2
Is composed of an inner layer 2A and an outer layer 2B, and a fiber layer 3 is provided therebetween. The inner layer 2A facing the lumen 4 is SBR
Or rubber mainly composed of NBR is preferable, and its JIS
The A hardness is 70 °. The hardness of this rubber is 50-80
A range of ° is preferred. The inner layer 2A has a thickness of about 1 mm. When the radius r of the inner cavity 4 has a taper, it is preferable that the radius r is smaller within the above hardness range. The inner layer 2A is not limited to rubber, and may be an elastic body having physical properties similar to rubber such as urethane. A fiber layer 4 is provided around the inner layer 2A. In this example, the fiber layer 4 is made of carbon fibers (diameter 0.007).
mm) are bundled into one unit, and further 6 bundles are bundled together, and a fiber bundle is inclined at an angle of about 45 ° with respect to the central axis and cross-arranged. In manufacturing the grip, in order to form the fiber layer 4, one or more fiber bundles are arranged on an inner layer (for example, unvulcanized rubber) 2A arranged around a mandrel (not shown), and an angle is given to the axial direction. The grip 1 is wound from the front end 1A toward the rear end 1B. When it reaches the rear end portion 1B, it is similarly wound toward the front end portion 1A at the same angle. By repeating this reciprocal winding a required number of times, the crossed fiber layer 4 shown in FIG. 1 is formed. The gap between the fibers is preferably 1 to 2 times the fiber bundle diameter. As the fibers used in the fiber layer 3, non-stretchable fibers such as glass fibers, metal fibers and aramid fibers are used. In addition to a bundle of fibers, twisted yarns (or cords) can be used. The angle of inclination of the fiber with respect to the central axis is preferably in the range of 40 ° to 50 °. An outer layer 2B made of a rubber similar to the inner layer 2A and having a JIS A hardness of 60 ° is provided on the fiber layer 3. The hardness of the outer layer 2B is preferably in the range of 40 ° to 70 ° and lower than the hardness of the inner layer 2A. As the outer layer 2B, an elastic body other than rubber can be used as in the inner layer 2A. In this embodiment, the outer layer 2B has the largest thickness on the rear end portion 1B side, and the thickness gradually decreases toward the front end portion 1A. As a result, the grip 1 has a tapered shape as a whole. That is, the radii t ₁ and t ₂ are t ₁
> T ₂ . The outer surface of the outer layer 2B can be appropriately provided with an uneven pattern for preventing slippage.

The gap between the fibers in the fiber layer 3 formed during the molding is filled with the rubber of the inner layer 2A, the outer layer 2B or the inner and outer layers 2A, 2B flowing in the initial stage of the thermosetting process after the molding. Exhausted.

[0010]

As described above, according to the present invention, a layer in which non-extensible fiber bundles or threads are inclined with respect to the axial direction of the grip and arranged in different directions is provided inside the thick elastic body. Since it is embedded and reinforced, twist of the grip is reduced.

[Brief description of drawings]

FIG. 1 is a half sectional view showing a preferred embodiment of the present invention.

[Explanation of symbols]

 1 Grip 2 Elastic 3 Fiber layer

Claims (1)

[Claims] 1. A cylindrical grip having a predetermined thickness, which is made of rubber or a rubber-like elastic material, and has a layer in which non-stretchable fiber bundles or threads are inclined with respect to the axial direction of the grip and cross-arranged in different directions. A grip for a golf club, which is embedded and reinforced inside the thick elastic body.