JPH05161729A - Shaft for golf club - Google Patents

Abstract

PURPOSE:To provide a shaft for a golf club capable of confirming the existence of a titanium foil compositely used with reinforcing fibers such as carbon fibers from the outside and capable of being coated on the outer surface of the shaft. CONSTITUTION:A titanium foil 2 is wound on the outer periphery of a shaft main body 1 made of synthetic resin and reinforcing fibers, a thin glass fabric 3 is wound in its outer periphery, and they are covered and fixed with a synthetic resin material 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a golf club shaft, and more particularly to a golf club shaft composed of a synthetic resin material and reinforcing fibers.

[0002]

2. Description of the Related Art As a golf club shaft made of a synthetic resin material and a reinforcing fiber, there is a carbon shaft which is popular not only for professional golfers but also for general golfers today. Therefore, the appearance of the finished product is black or grey, with the ground color of the carbon fiber appearing as it is. By the way, recently, not only carbon fiber but also carbon fiber and other reinforcing members have been compounded,
When the reinforcing member is a metal foil or a wire rod, it cannot be wound around and fixed to the outer circumference of the shaft body by itself, and when such a reinforcing member is used, the carbon fiber layer forming the shaft body is It is the actual situation that it is placed between them.

However, if the expensive reinforcing member as described above is arranged between the carbon fiber layers, the golfer cannot know it from the appearance, and it is generally known from the product manual or the like. .. Therefore, each manufacturer is researching each new material so that it can be seen from the outside when using such new material. Also, when the above new material is a material that repels paint, the surface cannot be painted even if it can be arranged and fixed to the outer layer, so it is not possible to provide a shaft with the paint that the golfer desires. Have a point.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the problems of the prior art as described above,
The purpose of the invention is to provide a shaft for a golf club in which the presence of a titanium foil to be used in combination with a reinforcing fiber such as carbon fiber can be confirmed from the outside and the outer surface of the shaft can be coated. is there.

[0005]

The technical means taken by the present invention to achieve the above object is to wrap a titanium foil around the outer peripheral surface of a shaft body made of a synthetic resin material and reinforcing fibers, and A feature is that a thin glass woven cloth is wrapped around the outer circumference, and they are covered and fixed with a synthetic resin material.

The reinforcing fibers used to form the shaft body include carbon fibers, alumina fibers, boron fibers,
High-strength, high-modulus fibers such as glass fibers can be used, and these fiber materials can be used alone or in combination of two or more types according to performance. The reinforcing fibers may be used in the form of a unidirectionally oriented sheet or woven fabric, which is impregnated with a synthetic resin solution to be semi-dried (prepreg).

The titanium foil wound around the outer peripheral surface of the shaft body is, for example, 0.014 mm thick, and has a trapezoidal shape that can be wound around the outer circumference of the shaft body (flat plate shape) or can be spirally wound. And In the case of a tape, a circular hole, a rectangular hole, or the like is formed in the tape so that the tape and the shaft main body, the glass woven cloth, and the tape can be securely adhered to each other.

Further, the thin glass woven cloth wrapped around the outer circumference of the titanium foil is a lattice which allows the titanium foil arranged inside to be seen through and has an amount of molten resin sufficient to cover the entire surface of the titanium foil. Those having a space (texture) are used.

[0009]

According to the above means, the titanium foil wound around the outer peripheral surface of the shaft main body is covered with the synthetic resin impregnated in the thin glass woven cloth wound around the outer surface of the titanium foil to cover the entire surface of the shaft main body. Be integrated. Since the glass woven fabric located outside the titanium foil is thin and the lattice spacing is large, the presence of the titanium foil is also confirmed from the outside of the glass woven fabric.

[0010]

As described in detail above, the shaft for a golf club of the present invention has a titanium foil wound around the outer peripheral surface of a shaft body made of a synthetic resin material and a reinforcing fiber, and a thin glass woven cloth on the outer periphery thereof. Since the titanium foil is wrapped and fixed by covering it with a synthetic resin material, the titanium foil is positioned on the outer side of the titanium foil and is pressed by a thin glass woven cloth, and the entire surface is covered with the synthetic resin material. Firmly integrated. Therefore, the titanium foil is not peeled off from the shaft body, and is sufficiently durable for long-term use.

Further, the glass woven fabric pressing the titanium foil from the outside is thin, and since the synthetic resin material necessary for covering the entire surface of the titanium foil is retained, the lattice spacing (texture) is large, so that the titanium foil is It can be confirmed from the outside through a woven glass cloth. Therefore, the ground color (gold color) of the titanium foil can be appealed to golfers, and the commercial value can be increased. In addition, titanium foil has the property of repelling paint, but since the titanium foil is covered with a synthetic resin material, it can be easily painted on the surface, and various shafts with various patterns are manufactured according to the golfer's request. You can do it. Furthermore, by forming the titanium foil into a tape shape, a spiral pattern, a twill pattern, or the like can be three-dimensionally formed.

[0012]

EXAMPLE An example of the present invention will now be described with reference to the drawings. In a golf club shaft, a titanium foil 2 is sprinkled on the outer peripheral surface of a shaft body 1 made of a unidirectionally aligned prepreg sheet of carbon fibers. A thin glass woven fabric 3 is wound around the foil 2, and the titanium foil 2 and the glass woven fabric 3 are integrally fixed to the shaft body 1 by being covered and fixed with a synthetic resin material 4.

The titanium foil 2 is obtained by cutting a flat plate of titanium foil into a trapezoidal shape so that it can be wound around the outer circumference of the tapered shaft body 1, and laminating it on a thin glass woven cloth impregnated with a synthetic resin material. The synthetic resin material 4 impregnated in the glass woven fabric 3 is melted by wrapping the laminated member around the outer periphery of the shaft body 1 with the glass woven fabric 3 facing outside and heat-treating the titanium foil 2 and the titanium foil 2. The glass woven cloth 3 is covered and fixed.

The above-mentioned titanium foil 2 is not limited to the form in which the glass woven cloth 3 is stuck to only one surface of the titanium foil 2 as shown in FIG. Alternatively, the woven fabric 3 may be laminated to form a sandwich, which may be wound around the outer periphery of the shaft body 1.

Furthermore, when the titanium foil 2 is to be fixed more firmly, holes 5 are formed in the titanium foil 2 as shown in FIGS. 4 and 5.
Are opened at appropriate intervals, the thin glass woven fabric 3 arranged outside is fitted into the hole 5 portion, and the resin material 4 covering the outside also passes through the hole 5 and the resin material of the shaft body 1 Fuse it.

The titanium foil 2 wound around the outer circumference of the shaft body 1 may be in the form of a tape having a predetermined width as shown in FIG. 6, and the titanium foil 2 in such a tape shape is spirally wound on the outer peripheral surface of the shaft body 1. While winding it in a shape,
By winding a thin glass woven tape around the outer surface without any gap, the resin material impregnated in the woven cloth is melted and covers the entire surface, and the same effect as in the above-described embodiment can be obtained. still,
When the titanium foil 2 is in the form of a tape, when the tape is wound in a twill, the fixing of the titanium foil at the intersecting portions is lowered when the tapes cross each other. Therefore, as shown in FIG. The tape 6 is provided with holes 6 at appropriate intervals, whereby the overlapping area at the intersection of the tapes is minimized and the adhesion at the intersection is enhanced.

The above-mentioned golf club shaft can be molded by a method in which a shaft body is formed in advance from a fiber-reinforced resin material, and a thin glass woven fabric impregnated with a titanium foil and a resin material is wound around the shaft body and heat-molded. Instead, the shaft body molding material (unidirectionally drawn and aligned prepreg sheet made of carbon fiber) is wound around a mandrel, the above materials are wound around the mandrel, and then the desired shaft can be molded as a method of heat molding. It can be done.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of a golf club shaft according to the present invention.

FIG. 2 is a partially enlarged sectional view of FIG.

FIG. 3 is a cross-sectional view showing another example of a bonded form of a titanium foil and a glass woven fabric.

FIG. 4 is a perspective view showing a form in which holes are made in a titanium foil.

5 is a partial cross-sectional view of a shaft using the titanium foil of FIG.

FIG. 6 is a perspective view of a titanium foil and a glass woven cloth in a tape form.

FIG. 7 is a view in which a tape of titanium foil is spirally wound around a shaft body.

FIG. 8 is a perspective view of a titanium foil tape with holes.

[Explanation of symbols]

 1 ... Shaft body 2 ... Titanium foil 3 ... Thin glass woven fabric 4 ... Synthetic resin layer 5, 6 ... Hole

Claims (3)

[Claims] 1. A shaft for a golf club in which a titanium foil is wrapped around an outer peripheral surface of a shaft body made of a synthetic resin material and a reinforcing fiber, a thin glass woven cloth is wrapped around the titanium foil, and these are covered and fixed with a synthetic resin material. .. 2. The shaft for a golf club according to claim 1, wherein the titanium foil is in the form of a flat plate wound over substantially the entire length of the shaft. 3. The golf club shaft according to claim 1, wherein the titanium foil is tape-shaped.