JP2010051824A - Golf club shaft - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a golf club shaft having a good stability in terms of carry and directions, ensuring the carry, very easy to hit a ball with, and particularly optimum for an iron club including a putter. <P>SOLUTION: This golf club shaft includes: a torsion rigidity retaining layer made of thermosetting resin having reinforced fibers obliquely crossing in the longitudinal direction of the shaft and a flexural rigidity retaining layer made of thermosetting resin having reinforced fiber aligned in parallel in the longitudinal direction. The torsion rigidity retaining layer includes: a plain-woven fabric layer 11 obtained by rolling up like a shaft a prepreg made of plain-woven fabric impregnated with thermosetting resin so that a warp and a weft are oblique to the longitudinal direction of the shaft, and hardening the same; and a 3-axial fabric layer 12 obtained by rolling up like a shaft a 3-axial fabric so that the weft is parallel or perpendicular to the longitudinal direction of the shaft and hardening the same. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a golf club shaft, and more particularly to a golf club shaft having excellent distance and direction stability.

  FIG. 6 is a perspective view showing the structure of a conventional plastic golf club shaft. As is clear from this figure, the torsional rigidity retaining layer 1 provided with the reinforcing fibers obliquely and the reinforcing fibers are the longitudinal direction of the shaft. The structure has a bending rigidity holding layer 2 aligned in the direction and a compression rigidity holding layer 3 in which reinforcing fibers are optionally aligned in a direction perpendicular to the longitudinal direction of the shaft. Typically, 4 to 6 plies of the torsional rigidity holding layer 1 and the bending rigidity holding layer 2 are provided to form a golf club shaft (see, for example, Patent Document 1).

  Conventionally, a composite shaft is shown in FIG. 7 after winding a UD prepreg in which reinforcing fibers are arbitrarily aligned in a direction perpendicular to the longitudinal direction of the shaft on a shaft-shaped metal mandrel having a taper. Thus, a UD prepreg sheet in which reinforcing fibers such as carbon fibers are laid obliquely in a predetermined direction and an inclined prepreg 42 in which reinforcing fibers are laid in a direction opposite to the predetermined direction are overlapped and the reinforcing fibers intersect in a biased manner. 4 After winding a plurality of layers of UD prepreg sheets laid with reinforcing fibers in a direction parallel to the longitudinal direction, the tape is spirally wound for pressing, and the thermosetting resin of the UD prepreg sheet is thermally cured. Manufactured.

  Since the golf club shaft manufactured by the method as described above has a pressing tape mark formed on the surface, the surface of the outermost UD bending rigidity holding layer is polished to remove the tape mark and make it smooth. After coating, printing, etc., a transparent surface layer is formed into a product.

  Such a composite shaft is manufactured by curing a thermosetting resin of a UD prepreg layer in which reinforcing fibers are basically aligned in one direction as described above. In the case of (1), while the elongation is 1.5%, the plurality of thermosetting resin layers have lower strength and greater flexibility than the reinforcing fibers. For this reason, it is sufficiently effective in the direction in which the reinforcing fibers are aligned, but when a force is applied in the thickness direction or the lateral direction, deformation or displacement occurs between the thermosetting resin layers, etc. There are drawbacks. When shot with a club using the golf club shaft manufactured as described above, there is a drawback that it becomes difficult to perform a stable shot due to displacement or deformation between the thermosetting fiber layers. For this reason, there is a fear that variations in directivity and flight distance may occur. Moreover, the shift | offset | difference of the thermosetting fiber layer as mentioned above may impair shot feeling. In other words, golf players tend to prefer the feeling of steel shafts, but the aforementioned misalignment between the thermoset fiber layers has the disadvantage of producing a feeling away from the feeling of the steel shaft.

  Further, since the UD torsional rigidity holding layer is formed by bonding the prepregs 41 and 42, there is a disadvantage that the displacement due to the bonding is inevitably caused and the accuracy of the shaft is not improved, and the number of steps is increased because the bonding is performed. There was a disadvantage that it increased and the processability deteriorated.

  In order to solve the above-mentioned problems, a golf club shaft using a triaxial woven fabric as shown in FIG. 8 for the torsional rigidity retaining layer 1 has also been developed (see, for example, Patent Document 2). As is apparent from this figure, the triaxial woven fabric 5 has a first warp 52 that is inclined with respect to the weft 51 and a second warp 53 that is skewed to the warp 52. These wefts 51, warps 52 and warps 53 alternately pass through the top and bottom of the yarn and have a woven structure. The angle θ at which the warp yarns 52 and 53 intersect is generally 60 °. According to a golf club using such a shaft, there is a tendency that the flight distance increases, the flight distance stability, and the directionality become good. However, since three yarns are woven, the ball is hit. The problem is that the bending of the shaft quickly returns and only a golfer with a moderate head speed can handle it. In particular, in the case of an iron club, since a better result can be obtained by swinging slowly, a club using the above-described triaxial fabric is difficult to hit and is practically used as an iron club. Not.

  The present invention has been made in view of the above-described problems, and has a good flight distance and direction stability, can ensure a flight distance, is excellent in hitting, and is particularly suitable for an iron club including a putter. The purpose is to provide a club shaft.

JP-A-9-131422 Utility Model Registration No. 2553612

  The present invention has been made in view of the above-described problems, and has a good flight distance and direction stability, can ensure a flight distance, is excellent in hitting, and is particularly suitable for an iron club including a putter. The purpose is to provide a club shaft.

  In order to solve the above problems, a golf club shaft according to the present invention comprises a thermosetting resin torsional rigidity holding layer provided with reinforcing fibers obliquely crossed in the longitudinal direction of the shaft, and reinforcing fibers arranged in parallel in the longitudinal direction. The torsional rigidity holding layer comprises a prepreg impregnated with a thermosetting resin in a plain woven fabric having warp and weft woven with each other. The warp and weft have a plain weave fabric layer wound and cured in a shaft shape so that the warp and weft are obliquely crossed in the longitudinal direction of the shaft, a first warp inclined with respect to the weft, and a second warp skewed with this warp. These wefts, warps and warps are made of a triaxial woven fabric having a structure woven alternately above and below the yarn so that the wefts are parallel or perpendicular to the longitudinal direction of the shaft. Characterized in that it comprises a triaxial fabric layer was allowed winding turning curing.

  According to the present invention, a plain weave fabric is impregnated with a thermosetting resin as a torsional rigidity retaining layer, and a heat-cured plain weave fabric layer and a triaxial fabric layer using a triaxial fabric are provided. The plain woven fabric and the triaxial woven fabric are woven with warps and wefts, and the movement of the yarn is limited. Therefore, deformation or deviation between the layers of the thermosetting resin layer can be effectively suppressed. For this reason, it becomes possible to suppress the deviation between the layers at the time of the shot, the distance and the direction are stable, and the soft feeling and the return of the flexure are delayed as compared with the case of only the triaxial fabric layer. This produces the advantage of increased ease of striking. Such characteristics are optimal for an iron club including a putter.

1 is a cross-sectional view of a golf club shaft according to an embodiment of the present invention. Sectional drawing of the golf club shaft of other embodiment by this invention. Sectional drawing of the golf club shaft of other embodiment by this invention. Sectional drawing of the golf club shaft of other embodiment by this invention. The top view and AA sectional drawing of the plain weave fabric used for the golf club shaft by this invention. Explanatory drawing of an example of the structure of a golf club shaft. The block diagram of the prepreg which forms the conventional torsional rigidity holding layer. The figure explaining the structure of a triaxial fabric.

  As a typical configuration example of the golf club shaft according to the present invention, as shown in FIG. 1, an inclined prepreg 41 in which reinforcing fibers are laid obliquely in a predetermined direction, and an inclined prepreg 42 in which reinforcing fibers are laid in a direction opposite to the predetermined direction. The UD torsional rigidity retaining layer 1 obtained by curing a plurality of layers (for example, four layers, in this case, the prepreg sheet is 2 × 4 ply) of the UD prepreg sheet 4 in which the reinforcing fibers intersect with each other in a bias shape by overlapping A resin layer UD compression stiffness retaining layer 3 (referred to as a 90 ° layer) having reinforcing fibers arranged in a direction perpendicular to the longitudinal direction of the shaft is provided (for example, one layer (one ply)). A torsional rigidity holding layer 1 made of a plain woven fabric layer 11 is laminated on the UD compression rigidity holding layer 3. The plain woven fabric layer 11 is formed by winding a prepreg impregnated with a thermosetting resin into a plain woven fabric having warps and wefts woven with each other in a shaft shape so that the warps and wefts are obliquely crossed in the longitudinal direction of the shaft. It is hardened. The plain woven fabric layer 11 may be a single phase or a plurality of layers (for example, three layers).

  A UD bending rigidity holding layer 2 (referred to as a 0 ° layer) obtained by curing a thermosetting resin provided with reinforcing fibers aligned in parallel with the longitudinal direction is provided with a single phase or a plurality of layers, and a triaxial fabric layer is further provided. 12, and further, a single or plural UD bending rigidity holding layer 2 of 0 ° layer is provided. The triaxial woven fabric layer 12 has a first warp 52 inclined with respect to the weft 51 and a second warp 53 inclined to the warp 52. The weft 51, the warp 52 and the warp 53 are alternately made of yarn. It has a structure woven through up and down, and the weft 51 is wound and cured in a shaft shape so that it is parallel (0 ° direction) or perpendicular (90 ° direction) to the longitudinal direction of the shaft. is there.

  FIG. 2 shows another configuration example. In this example, an inclined prepreg 41 in which reinforcing fibers are laid obliquely in a predetermined direction and an inclined prepreg 42 in which reinforcing fibers are laid in a direction opposite to the predetermined direction are overlapped. In addition, the UD bending is applied to the UD torsional rigidity holding layer 1 obtained by curing a plurality of layers of the thermosetting resin (for example, four layers, in this case, the prepreg sheet is 2 × 4 plies) with the reinforcing fibers intersecting in a bias shape. One or two layers of the rigid holding layer (0 ° layer) 2 or the UD compression rigid holding layer (90 ° layer) 3 are laminated. The UD torsional rigidity holding layer 1 and the UD bending rigidity holding layer 2 or the UD compression rigidity holding layer 3 (0 ° layer or 90 ° layer) can be interchanged. That is, after providing a 0 ° layer or a 90 ° layer, the UD torsional rigidity holding layer 1 may be provided.

  The above-described layer is further provided with a torsional rigidity retaining layer (for example, two to three layers) composed of the plain weave fabric layer 11, and the bending stiffness retaining layer 2 or the compression stiffness retaining layer 3 (0 ° layer) is provided on the plain weave fabric layer 11. Alternatively, a triaxial woven fabric layer 12 is provided via 90 °), and a plain woven fabric layer 21 (eg 2 to 3 layers) is provided via a 0 ° layer 2 or a 90 ° layer 3 (eg 1 to 2 layers). Yes. This plain woven fabric layer 21 is a layer that is wound and cured so that the warp yarns are parallel to the longitudinal direction of the shaft (and thus the weft yarns are perpendicular to the longitudinal direction), and acts to maintain bending rigidity and compression rigidity. It has become.

  The plain woven fabric layer 21 is further provided with one or more bending rigidity holding layers (0 ° layers) 2.

  FIG. 3 shows another configuration example. In this configuration example, a single or a plurality of (for example, two to three) plain woven fabric layers 11 for maintaining torsional rigidity are provided. The plain woven fabric layer 11 is provided with one or a plurality of UD torsional rigidity retaining layers 1, a triaxial woven fabric layer 12, and the plain woven fabric layer 21 via a 0 ° layer 2 or a 90 ° layer 3. . In this structure, the bending stiffness retaining layer is provided on the plain weave fabric layer 21 for retaining the bending stiffness and compressing stiffness.

  FIG. 4 shows another typical configuration, in which one or a plurality of plain weave fabric layers 11 for retaining torsional rigidity are similarly provided on one or a plurality of UD torsional rigidity retaining layers 1, and this plain weave fabric layer is also provided. 11 is provided with a triaxial fabric layer 12. Further, one or a plurality of the UD bending rigidity holding layers 2 are laminated on the triaxial fabric layer 12.

  In such a typical golf club shaft according to the present invention, the plain woven fabric layer 11 constituting a part of the torsional rigidity retaining layer 1 is formed by curing a prepreg in which a plain woven fabric is impregnated with a thermosetting resin. You are using 5A is a plan view of a plain weave fabric used in the present invention, and b is a cross-sectional view taken along the line AA of FIG. 5. As is apparent from these drawings, the plain weave fabric 6 is composed of warp yarns 61 that are orthogonal to each other. And the weft 62 are woven together and wound in a shaft shape so that the longitudinal direction of the shaft (see the arrow in FIG. 5) and the angle θ of each warp 61 and weft 62 is approximately 45 °. And cured. At this time, depending on the winding, the angle between the warp 61 and the weft 62 and the longitudinal axis may slightly deviate from 45 °, but the angle between the warp 61 and the weft 62 is 2θ, that is, 90 °. It is stable. For this reason, the effect on the twist of the reinforcing fiber becomes constant, and therefore, it becomes easy to achieve a balance without winding the warp yarn 61 and the weft yarn 62 accurately. Therefore, the degree of freedom in design and workability are increased, and the vibration stability of the shaft is increased. Furthermore, when the angle of the oblique reinforcing fibers is 45 ° with respect to the longitudinal direction of the shaft, the best anti-twisting effect can be exerted, so that the reinforcing fibers become 45 ° in the longitudinal direction of the shaft as described above. Thus, the prepreg winding method is preferred.

  In the case of such a plain woven fabric, the warp 61 and the weft 62 are generally carbon fibers, but may be alumina fibers, aramid fibers, carbon silicate fibers, amorphous fibers, glass fibers, or the like. That is, the type of yarn is not basically limited.

  The number of threads of such plain weave fabric is preferably 4 / cm or more. If it is less than 4 pieces / cm, the thickness of the plain weave fabric becomes large, and the possibility may be impaired.

  The thickness of the thread is preferably 3K (1K is 1000 filaments) or less. If it exceeds 3K, one ply becomes too thick, and there is a possibility that a sufficient fiber density (the number of driven wires) cannot be secured, and it is difficult to wind the shaft, and workability may be deteriorated.

  As the prepreg resin impregnated in such a woven fabric, basically any resin can be used in the present invention. For example, it can be an epoxy resin, an unsaturated polyester resin, a phenol resin, a vinyl ester resin, a peak resin, or the like.

  The thickness of such a prepreg is preferably 0.3 mm or less. If it exceeds 0.3 mm, one ply becomes too thick, and there is a possibility that a sufficient fiber density (number of driven wires) cannot be ensured, and it is difficult to wind the shaft, and workability may be deteriorated.

The weight of the prepreg is preferably 400 g / m ² or less. If it exceeds 400 g / m ² , the resin may be too clogged in the weave and may become too thick. The resin amount of the prepreg is preferably 25 to 40% by weight. If the amount is less than 25% by weight, the amount of resin is too small and a good shaft may not be produced. On the other hand, if the amount exceeds 40% by weight, the torque may be too large.

  Further, the triaxial fabric 5 has the first warp 52 inclined with respect to the weft 51 and the second warp 53 that is skewed to the warp 52 as described above. These wefts 51, warps 52 and warps 53 alternately pass through the top and bottom of the yarn and have a woven structure.

  The angle θ formed by the warp 52 and the warp 53 is preferably 25 to 75 °. If it deviates from the range of 25 to 75 °, the isotropic property of the triaxial weave may be lost, and the shape retainability may be impaired. Most preferably, it is 50 to 70 °. Typically, it is a woven fabric in which wefts 51 and warps 52 and 53 are knitted together to form approximately 60 °.

  The wefts 51 and the warps 52 and 53 are generally carbon fibers as in the case of plain weave, but may be alumina fibers, aramid fibers, carbon silicate fibers, amorphous fibers, glass fibers, or the like. That is, the type of yarn is not basically limited. Furthermore, there are pitch and bread types of carbon fibers, and both can be used. These fibers have different physical properties between fibers, and the same fiber may have different physical properties such as tensile strength and tensile elastic modulus.

  Such triaxial fabrics should be 32 gauge to 64 gauge. Triaxial fabrics outside this range may reduce the performance of the golf club shaft. In the 32-gauge triaxial fabric, the distance dx between the wefts 51 is 1.80 mm, and the distance dy between the intersections of the warps 52 and 53 is 2.08 mm. For 64 gauge, the dx is 0.90 mm and the dy is 1.04 mm.

  The thickness of such a prepreg is preferably 0.4 mm or less. If it exceeds 0.4 mm, one ply becomes too thick, and there is a possibility that a sufficient fiber density (the number of driven wires) cannot be secured, and it is difficult to wind the shaft and the workability may be deteriorated.

The weight of the prepreg is preferably 350 g / m ² or less. If it exceeds 350 g / m ² , the resin is too clogged in the weave and may become too thick. The resin amount of the prepreg is preferably 25 to 50% by weight. If the amount is less than 25% by weight, the amount of resin is too small and a good shaft may not be produced. On the other hand, if the amount exceeds 50% by weight, the outer diameter of the shaft may be too large.

  In the golf club shaft having a typical configuration in the present invention, the UD bending rigidity is maintained at 0 ° layer or 90 ° layer between the plain weave fabric layer 11 and the triaxial fabric layer 12 (that is, between the fabric layer and the fabric layer). Layer 2 or UD compression stiffness retaining layer 3 is provided. Alternatively, the UD torsional rigidity holding layer 1 is provided. Such a configuration is provided to prevent the fabric layers 11 and 12 from coming into direct contact. When the fabric layers 11 and 12 are in direct contact with each other, the amount of resin is insufficient, and due to the unevenness of the fabric, the adhesive strength between the layers is insufficient, and there is a possibility of causing a shift between the layers. In order to prevent this, a 0 ° layer, a 90 ° layer, or a UD twist composite holding layer 1 is provided. Of course, this 0 ° layer also acts to maintain bending rigidity, and the 90 ° layer also retains compression stiffness.

  However, in the configuration of FIG. 4, the UD layer as described above is not provided. In this case, it is possible to prevent the shift between the layers by controlling the resin amount.

  In the present invention, the UD bending rigidity is a resin layer in which reinforcing fibers as shown in FIGS. 1, 2, 3, and 4 are aligned in the longitudinal direction of the shaft on the fabric layer 11, 12, or 21. The holding layer 2 is laminated. This bending rigidity holding layer 2 constitutes the outermost surface layer of the shaft. After the bending rigidity holding layer 2 is provided, the surface of the bending rigidity holding layer 2 as the outermost surface layer is polished and smoothed, and then coated, printed, etc., and then a transparent surface layer is formed. Product.

  In another aspect, the resin layer is a resin layer in which reinforcing fibers are aligned in the direction perpendicular to the longitudinal direction of the shaft (circumferential direction with respect to the shaft) inside or outside the UD torsional rigidity retaining layer 1 according to the present invention. A UD compression stiffness retaining layer 3 can be provided. The prepreg used for the UD compression rigidity retaining layer 3 can also be a prepreg similar to the conventional one.

  In the above embodiment, the triaxial woven fabric layer 12 and the plain weave woven fabric layer 11 are provided on the entire length of the shaft, but it is also possible to provide a part on the tip side and / or the butt side of the shaft. Further, it can be provided partly in the central portion of the shaft together with the tip side and / or the butt side or independently.

  A golf club shaft shown in FIG. 4 was manufactured using a plain woven fabric and a triaxial woven fabric as shown in FIGS. As the torsional rigidity retaining layer 1 as the innermost layer, an inclined prepreg 41 in which reinforcing fibers are laid obliquely in a predetermined direction and an inclined prepreg 42 in which reinforcing fibers are laid in a direction opposite to the predetermined direction are overlapped so that the reinforcing fibers intersect in a biased manner. 2 layers of UD prepreg sheet 4 (forming a UD torsional rigidity retaining layer) (prepreg is 2 × 2 plies), 3 plies of plain woven prepreg sheet, 1 ply of prepreg of triaxial woven fabric, 3 layers of 0 ° layer prepreg The ply was sequentially wound around a mandrel to cure the thermosetting resin of the prepreg, and the surface was polished to obtain a golf club shaft (A).

The amount of the prepreg of the plain weave fabric was 40%, and the prepreg of the 0 ° layer was 25%. The plain woven prepreg was wound into a shaft so that the longitudinal direction of the shaft (see the arrow in FIG. 5) and the angle θ of each warp and weft was approximately 45 °. The reinforcing fibers of the UD torsional rigidity retaining layer, 0 ° layer, plain weave fabric layer, and triaxial fabric layer were carbon fibers. The thickness of each warp and weft of the plain weave fabric layer was 3K, and the number of warps and wefts was 4.9 / cm each. Furthermore, when it was set as the prepreg, the thickness was 0.22 mm, and the total weight was 328 g / m ² .

The thickness of each weft and warp of the triaxial woven fabric was 1K, and the angle of the warp was 60 ° with respect to the weft. A prepreg impregnated with 40% resin in this triaxial woven fabric was used (32 gauge). Furthermore, when it was set as the prepreg, the thickness was 0.175 mm and the total weight was 122 g / m ² . This prepreg was wound so that the weft was in the direction perpendicular to the shaft (90 ° direction).

  For comparison, a golf club shaft (B) in which two UD torsional rigidity retaining layers are wound, three plain woven fabric layers and three bending rigidity retaining layers (0 ° layers) are provided thereon, and the UD twisting A golf club shaft (C) was produced in which four rigid retaining layers and three bending rigid retaining layers (0 ° layers) were provided.

  A head and a grip were attached to the golf shafts A, B, and C to form a 45 inch golf club.

  In Table 1 above, the unit of frequency is CPM. The shaft torque was 4.26 ° for A, 3.98 ° for B, and 4.07 ° for C.

  Using the three golf clubs described above, a golf ball was hit under the same conditions by a robot (see Japanese Patent No. 3285484). The robot was set so that the position of the hitting point with respect to the head was the same for each club and the head speed was 42 m / s.

  When 100 balls are hit at the center of the head of the golf club A using the shaft of the present invention, the ball drop point (carry) has an error of ± 3 yards in the front-rear direction (flying distance) around 205 yards. The error in the left-right direction was ± 4.25 yards. Furthermore, when 100 balls were hit by shifting 10 mm to the toe side, the error in the front-rear direction (flying distance) was ± 3 yards centered around 200.7 yards, and the error in the left-right direction was ± 3.75 yards. It was.

  In the golf club B, when the ball is hit at the center of the head, an error in the front-rear direction (flying distance) is about ± 3.75 yards centered around 206 yards, and an error in the left-right direction is ± 5.0. It was a yard. Furthermore, when 100 balls were hit by shifting 10 mm to the toe side, the error in the front-rear direction (flying distance) around ± 200.6 yards was ± 4.5 yards, and the error in the left-right directions was ± 2.75 yards. It was.

  On the other hand, in the golf club C, when the ball is hit at the center of the head, the error in the front-rear direction (flying distance) is about ± 5.7 yards and the error in the left-right direction is about 206 yards. It was ± 6.5 yards. Further, when 100 balls were hit by shifting 10 mm to the toe side, the error in the front-rear direction (flying distance) was ± 5.25 yards and the error in the left-right direction was ± 4.0 yards around 202.7 yards. It was.

  That is, the golf club shaft A of the present invention showed better distance stability than the golf clubs B and C. In particular, with respect to the conventional golf club C made of UD prepreg, the stability in the distance and the left-right direction was improved, and a stable golf club shaft could be obtained.

1 Torsional rigidity retaining layer 11 Plain woven fabric layer (for retaining torsional rigidity)
12 Triaxial fabric layer 2 Bending stiffness retaining layer 21 Plain weave fabric layer (for retaining bending stiffness and compression stiffness)
3 Compressive rigidity retaining layer 4 UD prepreg sheet 5 Triaxial fabric 51 Weft 52 Warp 53 Warp 6 Plain weave 61 Warp 62 Weft

Claims (19)

  A torsional rigidity holding layer of a thermosetting resin having reinforcing fibers obliquely crossed in the longitudinal direction of the shaft, and a bending rigidity holding layer of a thermosetting resin having reinforcing fibers aligned parallel to the longitudinal direction. In the golf club shaft, the torsional rigidity retaining layer is formed of a prepreg impregnated with a thermosetting resin in a plain woven fabric having warps and wefts woven with each other so that the warps and wefts cross each other in the longitudinal direction of the shaft. A plain weave fabric layer wound in a shaft shape and hardened, a first warp inclined with respect to the weft, and a second warp oblique to the warp, and these weft, warp and warp alternately above and below the yarn A prepreg impregnated with a thermosetting resin in a triaxial woven fabric having a woven structure is wound into a shaft shape and cured so that the weft is parallel or perpendicular to the longitudinal direction of the shaft 3 axis Golf club shaft, characterized in that it comprises an object layer.   2. The golf club shaft according to claim 1, wherein the number of threads of the plain weave fabric is 4 / cm or more.   The golf club shaft according to claim 1 or 2, wherein the yarn of the plain woven fabric is 3K or less. 4. The golf club shaft according to claim 1, wherein the plain woven prepreg has a weight of 400 g / m ² or less and a thickness of 0.3 mm or less.   The golf club shaft according to any one of claims 1 to 4, wherein the resin amount of the prepreg is 25 to 40% by weight.   6. The golf club shaft according to claim 1, wherein the triaxial fabric is 32 gauge or 64 gauge. 7. The golf club shaft according to claim 1, wherein the prepreg of the triaxial woven fabric has a weight of 350 g / m ² or less and a thickness of 0.4 mm or less.   The golf club shaft according to any one of claims 1 to 7, wherein a resin amount of the prepreg of the triaxial woven fabric is 25 to 50% by weight.   9. The golf club shaft according to claim 1, further comprising a UD compression rigidity holding layer obtained by curing a UD prepreg in which reinforcing fibers are aligned in a direction perpendicular to the longitudinal direction of the shaft.   A UD bending rigidity retaining layer obtained by curing a UD prepreg in which reinforcing fibers are aligned in parallel with the longitudinal direction of the shaft between the triaxial woven fabric layer and the plain woven fabric layer, or reinforcing fibers in a direction perpendicular to the longitudinal direction of the shaft. 10. The golf club shaft according to claim 1, further comprising a UD compression rigidity retaining layer obtained by curing the aligned UD prepreg.   11. The golf club shaft according to claim 1, wherein an angle between the warp and the weft of the plain weave fabric is 90 °.   The golf club shaft according to claim 1, wherein an angle between the warp and the weft of the triaxial woven fabric is 60 °.   A UD twist in which an inclined prepreg in which reinforcing fibers are obliquely laid in a predetermined direction and an inclined prepreg in which reinforcing fibers are laid in a direction opposite to the predetermined direction are overlapped and a UD prepreg in which reinforcing fibers intersect in a bias shape is cured in a shaft shape The rigid holding layer, the plain weave fabric layer, the UD bending stiffness holding layer or the UD compression stiffness holding layer, the triaxial fabric layer, and the UD bending stiffness holding layer are sequentially laminated. Either golf club shaft.   The UD torsional rigidity holding layer, the UD bending rigidity holding layer or the UD compression rigidity holding layer, the plain woven fabric layer, the UD bending rigidity holding layer or the UD compression rigidity holding layer, the triaxial woven layer, the UD bending rigidity. A prepreg impregnated with a thermosetting resin in a plain weaving fabric having a holding layer or the compression rigidity holding layer and warp and weft woven with each other, so that either the warp or the weft is parallel to the longitudinal direction of the shaft. The golf club shaft according to any one of claims 10 to 12, wherein a plain woven fabric layer for holding bending rigidity and / or compression rigidity, which is wound and cured in a shaft shape, and the UD bending rigidity holding layer are sequentially laminated. .   The UD bending stiffness holding layer or the UD compression stiffness holding layer, the UD torsion stiffness holding layer, the plain weave fabric layer, the UD bending stiffness holding layer or the UD compression stiffness holding layer, the triaxial fabric layer, the UD bending stiffness The golf club according to claim 10, wherein the holding layer or the UD compression rigidity holding layer, the plain woven fabric layer for holding the bending rigidity or compression rigidity, and the UD bending rigidity holding layer are sequentially laminated. shaft.   The plain woven fabric layer, the UD torsional rigidity holding layer, the triaxial woven layer, the UD bending rigidity holding layer or the UD compression rigidity holding layer, the plain weaving fabric layer for holding the bending rigidity or compression rigidity, and the UD bending rigidity holding. The golf club shaft according to claim 10, wherein the layers are sequentially laminated.   14. The golf club shaft according to claim 13, wherein the UD compression rigidity holding layer is provided between the UD twist rigidity holding layer and the plain weave fabric layer.   A UD twist in which an inclined prepreg in which reinforcing fibers are obliquely laid in a predetermined direction and an inclined prepreg in which reinforcing fibers are laid in a direction opposite to the predetermined direction are overlapped and a UD prepreg in which reinforcing fibers intersect in a bias shape is cured in a shaft shape The rigid retention layer, the plain weave fabric layer, the triaxial fabric layer, and a UD bending stiffness retention layer obtained by curing a UD prepreg in which reinforcing fibers are aligned parallel to the longitudinal direction of the shaft are laminated in order. The golf club shaft according to any one of 1 to 9.   The golf club shaft according to any one of claims 1 to 12, further comprising a plain woven fabric layer for maintaining the bending rigidity and / or compression rigidity.

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