JPH04120769U - golf club shaft - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a golf club shaft that can accommodate various characteristics such as torsion and feel. [Structure] The reinforcing fibers intersect a unidirectional resin layer 7 in which reinforcing fibers are aligned parallel to the axial direction of the golf club shaft S, and a resin layer in which reinforcing fibers are aligned obliquely in the axial direction. It is characterized by consisting of an oblique resin layer 6 which is superimposed in the same manner as shown in FIG. [Effect] By combining the unidirectional resin layer, the diagonal resin layer, and the multiaxial woven resin layer, golf club shafts with various performances can be manufactured.

Description

[Detailed explanation of the idea]

0001

[Technical field of invention]

This invention is a golf club shaft, and more specifically, a golf club shaft that is easier to manufacture than conventional ones. Regarding golf club shafts.

0002

[Prior art]

FIG. 4 is a perspective view showing the structure of a conventional plastic golf club shaft. However, as is clear from this figure, the reinforcing fibers 2 are aligned diagonally on the core bar 1. The prepreg 3 is wound, and then the prepreg 3 is wrapped with the reinforcing fibers 2 aligned diagonally in the same way. The preg 4 is wound in opposite directions so that the reinforcing fibers 2 intersect diagonally. then , a prepreg 5 in which reinforcing fibers 2 are aligned parallel to the axial direction of the shaft is wrapped around the shaft. Let's go.

0003 This is made into 1 sheet/3 ply, wrapped around 3 to 4 plies, and the resin is cured. Manufactures golf club shafts.

0004 Note that the reinforcing fibers are aligned in the diagonal direction and are wound so as to cross each other. The two layers formed form a diagonal resin layer, which is a layer to prevent twisting of the shaft. one The unidirectional resin layer with reinforcing fibers aligned in the axial direction of the shaft maintains strength. It becomes a strength-retaining layer for

[0005]

[Problems solved by the idea]

Plastic golf club shafts such as those mentioned above have been used successfully in the past. However, the current situation is that there is a demand for even higher quality golf club shafts. It is. In other words, the feel of a steel shaft is similar to that of a plastic golf ball. For example, if there is a need for a club, or if there is a need to further reduce torsion, or even more. There is a growing demand for shafts with uniform vibration.

[0006]

[Purpose of invention]

The present invention has been developed in view of the above points, and is designed to improve the golf club shaft as described above. As golf clubs become more sophisticated, we provide golf club shafts that meet various demands. The purpose is to

[0007]

[Means to solve the problem]

In order to achieve the above object, the golf club shaft according to the present invention provides a golf club shaft according to the present invention. A unidirectional resin layer with reinforcing fibers aligned parallel to the axial direction of the shaft, and a A resin layer in which reinforcing fibers are aligned diagonally in the axis direction is arranged so that the reinforcing fibers intersect. An oblique resin layer superimposed on a multi-axial woven resin layer and a multi-axial woven resin layer with a multi-axial woven fabric as a reinforcing layer. It is characterized by

[0008] According to the present invention, for using a multiaxial fabric. Twisting prevention effect compared to conventional methods ``It is possible to manufacture a shaft that is homogeneous in the length direction and ensure homogeneous vibration.'' The shaft bends less and becomes harder, resulting in better repulsion and smoother strokes. At the intersection of multi-axis fabrics, you can swing with the feel of a chill shaft. Since resin can maintain sufficient strength, less resin is needed to manufacture lightweight clubs. This brings about advantages such as making it possible to build Or, combine one or two of these effects. The advantage of this combination is that it is easy to manufacture shafts with the desired performance. Jiru.

[0009]

[Specific explanation of the idea]

FIG. 1 is an exploded perspective view of one embodiment of the present invention, and as is clear from this figure, In the golf club shaft according to the present invention, the reinforcing fibers are stretched diagonally in the axial direction of the shaft S. A diagonal fabric made by laminating two aligned prepregs so that the reinforcing fibers intersect. An exchange resin layer 6 and a unidirectional resin layer 7 in which reinforcing fibers are aligned in the axial direction of the shaft S. and a multiaxial fabric resin layer 8 in which the multiaxial fabric serves as a reinforcing material.

0010 The combination of these layers 6, 7, and 8 is basically limited in the present invention. isn't it. For example, the multiaxial fabric resin layer 8 may be the bottom layer or the top layer. Good too. Furthermore, the number of these layers 6, 7, 8 is not limited either. for example Although a plurality of multiaxial fabric layers 8 can be used, in general, many multiaxial fabric layers 8 are used. This tends to make the shaft stiffer, and the feel of a steel shaft is required. Ideal for club shafts. However, the unidirectional resin layer 7, oblique If the resin layer 6 is omitted and the entire multiaxial fabric resin layer 8 is used, various properties of the shaft may be used. This is not preferable because there is not much freedom to control the performance.

[0011] Therefore, in the present invention, at least one oblique resin layer 6, one direction resin layer 7, This requires the multiaxial fabric resin layer 8. Depending on the number of these layers, the order of stacking, etc. This is because it becomes possible to control the hardness of the shaft.

0012 Since the multiaxial fabric resin layer 8 uses a multiaxial fabric as a reinforcing layer, It has the effect of homogenizing the vibration of the foot. In other words, in the conventional diagonal resin layer 6, two How to overlap sheets of prepreg, reinforcing fibers at the intersection of crossed reinforcing fibers Homogeneous vibration is hindered by misalignment, and the torsion prevention effect is also uneven. However, by using a multiaxial woven resin layer with a multiaxial woven fabric as a reinforcing layer, That problem will be resolved.

[0013] FIG. 2 is a plan view of a triaxial weave fabric as a multiaxial fabric. As shown in Kana, the triaxial fabric has a first warp 22 inclined to the weft 21 and this warp. It has a second warp 23 diagonally intersecting with 22. These threads 21, 22, 23 intersect It has a woven structure in which threads pass over and under each other.

[0014] When manufacturing a golf club shaft using such a triaxial fabric, the triaxial fabric We manufacture prepreg, which is fabric impregnated with thermoplastic resin or thermosetting resin, This prepreg is wound around a core metal. At this time, the weft 21 is flat in the axial direction of the shaft. The first warp 22 and the second warp 2 are wound by winding them around the core bar in a row. 3 becomes a bias shape. For this reason, a single sheet of prepreg can prevent twisting and maintain strength. A layer having both functions can be formed.

[0015] In the case of such a triaxial fabric, the warp 22 and/or the warp 23 are made of ordinary carbon fibers. instead of alumina fiber, aramid fiber, tyranno fiber, amorphous fiber, glass It can also be used as fiber. Since the weft yarn 21 maintains strength, Carbon fiber is preferred.

[0016] The angle of the warp threads 22 and 23 with respect to the weft thread 21 is preferably 25 to 75°. It's good to have one. If it is less than 25°, the effect of stopping twisting will be reduced. The number of threads of such a triaxial fabric is preferably one for each of the weft and two warp threads. It is preferable that the number of lines is 2 to 3 lines/cm or more. If it is less than 2 pieces/cm, it will not prevent twisting. It may be difficult to stop and maintain strength.

[0017] The thickness of the weft and warp yarns is preferably 1K to 6K. Less than 1K If it is thicker than 6K, the strength and torsion prevention may not be sufficient, and if it is thicker than 6K, the rubber This is because the thickness of the club shaft becomes larger and the weight becomes larger.

[0018] The prepreg resin used to impregnate such textiles is basically used in this invention. Can be used with anything. For example, epoxy resin, unsaturated polyester resin, It can be a phenolic resin, a vinyl ester resin, etc.

[0019] FIG. 3 is a plan view of the biaxial fabric, and as is clear from this figure, this biaxial fabric The product has a woven structure in which two warp threads 31 and 32 intersect with each other. Ru.

[0020] In this case, the biaxial fabric is placed on the core bar so that it is biased in the longitudinal direction of the shaft. The prepreg is rolled up, and then the prepreg with reinforcing fibers aligned in one direction is rolled up. The reinforcing fibers are wound into one sheet so that they are parallel to the longitudinal direction of the shaft. .

[0021] In this case, the biaxial fabric may be a plain weave fabric cut diagonally. Alternatively, a cloth woven on the bias in advance may be used. The warp threads 31 and The angle with respect to the longitudinal direction of the shaft of 32 is the same as in the case of triaxial fabric, and The fibers of the threads 31 and/or 32 include carbon fibers, as well as carbon fibers, as in the case of triaxial fabrics. Alumina fiber, aramid fiber, tyranno fiber, amorphous fiber, glass fiber, etc. can be used.

[0022] The number of stitches, thread thickness, etc. are the same as in the case of triaxial fabric.

[0023]

【Example】

Using a multi-axial woven resin layer using a tri-axial woven fabric as shown in Figure 2, golf club manufactured a shaft. The weft and warp of this fabric were all made of carbon fiber. each The thickness of the weft and warp is 1K, and the angle of the warp is the weft (longitudinal direction of the shaft). The angle was set at 60° with respect to the direction of . In addition, the number of weft and warp threads (two) are each It was 91/4/2.54 cm.

[0024] The reinforcing fibers of the diagonal resin layer and the unidirectional resin layer are also prepped using 12K reinforcing fibers. I used reg.

[0025] This has an oblique resin layer, a unidirectional fiber layer, and a triaxial woven resin layer. Cross-layered 3-ply, unidirectional 3 plies of fiber layer, 1 ply of triaxial fabric layer. A total of 7 plies were wound in the order of , "," .

[0026] In addition, using the conventional method, 3 ply diagonal layers, 4 plies in one direction (1 ply in one direction for three axes) manufactured golf club shafts. At this time, the type of fiber, bias The angle, thickness, type of resin, etc. were the same as in the previous example.

[0027]

[Table 1]

[0028] From the above results, according to the present invention, a shaft with more homogeneous vibration can be manufactured compared to the conventional method. It is clear that it is possible to achieve a shaft that is easy to build, has high hardness, and has good repulsion. became.

[0029]

[Effect of the idea]

As explained above, according to the golf club shaft of the present invention, a multiaxial fabric is used. For use. A uniform system in the length direction that has a greater twist prevention effect than conventional The shaft has minimal bending and can ensure homogeneous vibration. This makes it harder, giving better repulsion and the feel of a steel shaft. If there is resin at the intersection of the multiaxial fabric, it will be able to swing with sufficient strength. This has advantages such as requiring less resin and making it possible to manufacture lightweight clubs. Ru. Or, by combining one or two of these effects, you can achieve the desired sex. This has the advantage that a shaft with a high capacity can be manufactured easily.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view showing a configuration example of the present invention.

FIG. 2 is a plan view of the triaxial fabric used in the present invention.

FIG. 3 is a plan view of the biaxial fabric used in the present invention.

FIG. 4 is an exploded perspective view showing the configuration of a conventional golf club shaft.

[Explanation of symbols]

6 Oblique resin layer 7 Unidirectional resin layer 8 Multiaxial woven resin layer

Claims (3)

[Scope of utility model registration request] 1. The reinforcing fibers intersect a unidirectional resin layer in which reinforcing fibers are aligned parallel to the axial direction of the golf club shaft and a resin layer in which reinforcing fibers are aligned obliquely in the axial direction. 1. A golf club shaft comprising a diagonal resin layer superimposed in a manner similar to the above, and a multiaxial woven resin layer having a multiaxial woven fabric as a reinforcing layer. 2. The golf club shaft according to claim 1, wherein the multiaxial fabric is a biaxial fabric. 3. The golf club shaft according to claim 1, wherein the multiaxial fabric is a triaxial fabric.