JP2008142281A - Grip for golf club - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a grip for a golf club with enhanced "sense of moisture" to be felt when holding the grip and enhanced "sense of firmness" to be felt in a thick part on the grip end side while securing the productivity without increasing the number of steps for the manufacture. <P>SOLUTION: A grip body 1 of the grip for the golf club is integrally molded of a rubber or resin material. A number of recessed dimples or grooves 2 are formed on the surface inside the grip body 1 in the direction orthogonally crossing the longitudinal direction of the grip body 1, and reinforcing fiber cords 3 are embedded in part inside the grip body 1. The length of the fiber cords 3 is at least 1/3 of the total length L of the grip body 1, and the fiber cords are embedded on the grip end 1a side in such a way as not to be exposed to the surface of the grip body. As for the dimples or grooves 2, such shapes are suggested as circular and narrow dimples or grooves 2, oblong grooves 2a, corrugated grooves 2b formed in the circumferential direction orthogonally crossing the longitudinal direction of the grip body 1, inverted V-shaped grooves 2c, short linear grooves 2d crossing each other in the vertical direction, and linear grooves 2e. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a grip for a golf club, and more specifically, when gripping the grip, a moist feeling (feeling of fitting to the hand with moisture) and a firm feeling (rigidity, In particular, the present invention relates to a grip for a golf club having a grip rigidity and a feeling of being difficult to slide.

  Conventionally, as a grip for a golf club, in addition to a rubber grip made of natural rubber, synthetic rubber or foamed material, a leather grip made of leather or the like is known. In recent years, a grip made of a thermoplastic elastomer in consideration of the surface design (colored object) has also been proposed.

  A grip for a golf club is a part that a golfer directly grips with a hand, and is a member that affects a sensual part of the golfer such as touch, thickness, and prevention of slipping, and also has a great influence on a shot result.

  In recent years, improvements have been made to the feel and hardness of the surface by improving the material, design pattern, and structure. One of the characteristics of the tactile sensation and hardness preferred by golfers, especially advanced players, is the expression of “moist feeling” and “solid feeling”, and various inventions to achieve this and achieve both slip prevention effects Has been proposed (see, for example, Patent Document 1 and Patent Document 2).

  A golf club grip is generally thicker as it approaches the grip end side, and has a structure in which the thickness increases as it approaches the grip end side in order to form this form. Moreover, in order to realize the above-mentioned “moist feeling”, it is necessary to soften the rubber or resin material. However, the thicker the thickness, the more “tight” feeling such as rigidity will be lost. .

  For this purpose, a two-layer structure in which the inner side is made of hard rubber and the surface layer is covered with a soft rubber, or a structure in which the surface is provided with an uneven pattern or the like in addition to this structure is required. In this case, there is a problem that it is necessary to perform the molding in two steps at the time of grip molding, resulting in an increase in cost due to an increase in the number of processes and a decrease in yield.

  In addition, a so-called “cord grip” in which long fibers are sandwiched in a rubber material and cotton yarn is exposed on the entire surface or a part of the grip has been proposed in order to enhance the sliding effect when wet and to obtain a “feel”. (For example, refer to Patent Document 3).

  The fiber cord is used to stabilize the track or to prevent the golfer from feeling unstable due to the torsional stress generated when the golfer swings the golf club while holding the grip. It has the effect of increasing the torsional rigidity of the grip. Therefore, it is effective to arrange the fiber cord on the surface side of the grip more.

However, when trying to place the fiber cord near the surface of the grip, the rubber or resin material flows in the mold due to the pressing force of the mold applied at the time of grip molding, and the mold with the fiber cord sandwiched as a rigid material Even if set, the fiber cord is exposed on the surface, and there is a problem that the “moist feeling” is lost.
JP 2003-260155 A JP 2004-154228 A JP-A-9-313657

  The present invention pays attention to such a conventional problem, and even in the conventional molding method, it is possible to obtain a “moist feeling” when the grip is gripped without exposing the fiber cord to the surface, and the meat on the grip end side. An object of the present invention is to provide a grip for a golf club that can enhance a “firm feeling” in a thick portion.

  In order to achieve the above object, the present invention provides a golf club grip in which a fiber cord is embedded in a longitudinal direction in a grip body made of rubber or a resin material, and the fiber cord has a total length of the grip body. And at least 1/3 or more of the thickness and embedded in the grip end side so as not to be exposed on the surface of the grip body.

  Here, in the portion where the fiber cord of the grip body is embedded, the fiber cord is disposed outside 1/2 of the thickness direction of the grip body, and at least on the surface of the grip body where the fiber cord is embedded The dimples or grooves are formed with an interval between the dimples or grooves of 0.5 mm to 4.0 mm, and the occupied area of the dimples or grooves is the surface area of the grip body in the fiber cord embedded area excluding the parting part and the logo part. Of 25% or more.

  Further, the arrangement direction of dimples or grooves appearing on the surface of the grip body is formed so as to form an angle of 45 degrees or more with the arrangement direction of the fiber cords.

  In the present invention, when a grip with a fiber cord as described above is formed, the fiber cord is exposed on the surface of the grip even when rubber or resin flows when heated or pressurized by the dimple or groove design on the grip surface. At the same time, fiber cords are embedded in the vicinity of the grip surface, effectively increasing the torsional rigidity of the grip, and the surface is exposed to soft rubber, providing a “feel” while maintaining productivity. It is possible to achieve both “moist feeling”.

  The present invention provides a golf club grip in which a fiber cord is embedded in a longitudinal direction in a grip body made of rubber or a resin material as described above, and the fiber cord is at least the entire length of the grip body. Since it is embedded in the grip end side so that it is not more than 1/3 and exposed to the surface of the grip body, it is possible to form a “moist feeling” on the surface and a thick part on the grip end side with a single molding when manufacturing the grip. It is possible to easily produce a grip that enhances the “feel” and achieves both of these, improving the productivity of the grip and reducing the cost.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  1 is a partially cutaway front view of a golf club grip embodying the present invention, FIG. 2 is an end view taken along line AA in FIG. 1, and FIG. 3 is an end view taken along line BB in FIG. The grip body 1 of the golf club grip is integrally formed of rubber or a resin material, and the surface inside the grip body 1 has a direction (including an orthogonal direction) intersecting the longitudinal direction of the grip body 1. A large number of concave dimples or grooves 2 are formed, and a reinforcing fiber cord 3 is embedded in a part of the grip body 1.

  The fiber cord 3 is embedded at least 1/3 of the overall length L of the grip body 1 and is not exposed on the surface of the grip body on the grip end 1a side. 4 (a) to (f), in addition to circular and small-diameter dimples or grooves 2, an elliptical groove 2a and a wavy groove 2b formed in a circumferential direction perpendicular to the longitudinal direction of the grip body 1 In addition, a C-shaped groove 2c, a short linear groove 2d intersecting in the vertical direction, a linear groove 2e, and the like are conceivable.

  The shape of the dimple or groove 2 is not limited to the above embodiment, and the grooves or dimple grooves can be formed in any combination.

  The distance h between the dimples or grooves 2 is preferably 0.5 mm to 4.0 mm, and the depth of the dimples or grooves 2 is preferably 0.5 mm to 1.0 mm. Further, the occupied area of the dimple or groove 2 is 25% or more of the grip body surface area in the fiber cord embedment area excluding the parting part (parting line part by the mold) and the logo part (part where characters, figures and symbols are inserted). It is desirable to be.

  When the distance between the dimples or the grooves 2 is less than 0.5 mm, the flow of the rubber or resin material that has flowed during molding is poor, and the appearance of the molded grip body 1 cannot be as designed, so-called pattern chipping occurs. In addition to an increase in probability, the risk of damage to the mold is increased, which is not preferable in consideration of mass productivity.

  On the other hand, when the distance between the dimples or the grooves 2 exceeds 4.0 mm, the rubber body or the resin material that flows during molding of the grip body 1 is extruded, and a portion where the fiber cord is exposed is generated on the surface of the grip body. There is a possibility of losing the “moistness” that is one of the purposes of The fiber cord 3 is not necessarily exposed due to the flow of rubber or resin at the time of molding, the thickness of the fiber cord 3 or the variation in the arrangement, but the dimple or the dimple or the yield is considered in consideration of productivity and yield. The interval between the grooves 2 is preferably 4.0 mm or less.

  If the depth of the dimple or groove 2 is less than 0.5 mm, the dimple or groove 2 may be lost when the grip body 1 after molding is buffed. Even if the interval is within 4.0 mm, the exposure of the fiber cord 3 to the surface due to the flow of rubber or resin material during molding may not be suppressed.

  Further, when the depth of the dimple or groove 2 exceeds 1.0 mm, the fiber cord 3 is not exposed to the surface, but the dimple or groove 2 is so uneven that the hand is not easily exposed. Hurts and the “moist feeling” that is the object of the present invention is impaired. Further, the possibility of damage to the convex portion of the mold is increased, which is not preferable in terms of productivity.

  In addition, it is desirable that the arrangement direction of the dimples 2 or grooves appearing on the surface of the grip body 1 is formed at an angle of 45 degrees or more with the arrangement direction of the fiber cord 3.

  When the angle between the arrangement direction of the dimples or grooves 2 and the arrangement direction of the fiber cords 3 is 45 degrees or less, the fiber cords 3 bypass the dimples or grooves 2 due to the flow of rubber or resin material during molding. There is a possibility of exposure to the surface, and there is a possibility that the “moist feeling” which is one of the objects of the present invention cannot be achieved.

  As described above, the distance, depth, and arrangement angle of the dimples or grooves 2 can form the object of the present invention by a combination thereof, and are not specifically limited. By satisfying the range, it is possible to reliably achieve the effects of the present invention.

  In the embodiment of the present invention, even when the fiber cord 3 is disposed in the vicinity of the surface side of the grip body 1, the fiber cord 3 is not exposed to the surface, and “thickness” is felt in the thick portion on the grip end side. Can be increased. The reason for this is that the occupied area of the dimple or groove 2 is 25% of the grip body surface area of the fiber cord embedded area excluding the parting part (parting line part by the mold) and the logo part (parts where characters, figures and symbols are inserted). By setting to% or more, since the fiber cord 3 is pushed into the material of the grip body 1 by the convex portion of the die during molding with the die, the fiber cord 3 is not exposed to the surface.

Next, a method for manufacturing the golf club grip as described above will be briefly described.
In general, as shown in FIGS. 5 to 7, a method for manufacturing a grip with a fiber cord is obtained by impregnating a fiber cord 3 arranged parallel to a comb shape with a rubber or resin material and forming a thin sheet. Further, they are laminated with rubber or resin sheets, or are sandwiched to form sheet-like materials 5a and 5b having a necessary thickness.

  Then, the sheet-like materials 5a and 5b are cut into appropriate sizes or lengths, and set in the cavity portions of the molding dies 6a and 6b (upper mold and lower mold), and the grip molding mandrel 7, the molding dies 6 a and 6 b are closed, and the grip body 1 including the fiber cord is formed by heating, pressurizing, or heat-curing, and the portion not including the fiber cord 3 is formed. The rubber or resin sheet is cut into an appropriate size or length, and is arranged so as to be joined to the fiber cord containing portion, and set in the cavity portion of the molding dies 6a and 6b (upper die and lower die). To be molded.

  In the embodiment of the present invention, when the grip body is formed by using the manufacturing method as described above, the productivity is ensured without increasing the number of steps at the time of manufacturing, and then the grip is gripped. A “moist feeling” and a “solid feeling” are enhanced at the thick part on the grip end side, and a grip that balances both can be easily manufactured.

1 is a partially cutaway front view of a golf club grip embodying the present invention. It is an end view of the AA line of FIG. It is an end view of the BB line of FIG. (A)-(f) is explanatory drawing which shows the shape of the dimple or groove | channel which can be used by embodiment of this invention. It is explanatory drawing of the manufacturing process of the grip for golf clubs of this invention. It is an end view of the CC line of FIG. FIG. 5 is an end view taken along line DD of FIG. 4.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Grip main body 1a Grip end 2 Dimple or groove 3 Fiber cord 4 Convex part 5a, 5b Sheet-like material 6a, 6b Mold for molding 7 Grip molding mandrel

Claims (5)

A golf club grip in which a fiber cord is embedded along the longitudinal direction in a grip body made of rubber or a resin material,
A golf club grip characterized in that the fiber cord is at least 1/3 or more of the entire length of the grip body and is embedded on the grip end side so as not to be exposed on the surface of the grip body.   2. The golf club grip according to claim 1, wherein the fiber cord is disposed outside ½ of a thickness direction of the grip body in a portion where the fiber cord of the grip body is embedded. 3.   The golf club grip according to claim 1 or 2, wherein dimples or grooves are formed at least on the surface of the grip body where the fiber cord is embedded, and the distance between the dimples or grooves is 0.5 mm to 4.0 mm.   4. The golf club grip according to claim 1, wherein an occupied area of the dimples or grooves is 25% or more of a grip body surface area of a fiber cord embedded area excluding a parting portion and a logo portion.   5. The golf club grip according to claim 1, 2, 3, or 4, wherein the arrangement direction of the dimples or grooves appearing on the surface of the grip body forms an angle of 45 degrees or more with the arrangement direction of the fiber cord.

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