JP2012200424A - Grip for golf club - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a grip allowing stable putting or a stable swing without largely varying balance of the whole putter or club.SOLUTION: In this grip for a golf club, weights (30, 31) within a range of 8-15 g is added to a region portion of an angle within a range of 20-60° with the central axis as the center, and an inertia moment around the central axis is increased as compared to an inertia moment before the addition. The sectional outer shape of the grip can be a hexagon, a deformed octagonal consisting of four short sides and four long sides, or a circle.

Description

  The present invention relates to a golf club grip, and more particularly to a grip that can perform stable putting and swinging without significantly changing the balance of a putter and the entire club.

  Recently, many people have come to enjoy golf competitions. During a golf competition, even if the golf ball can be stably moved by a sufficient distance in the intended direction with a wood-type club or iron-type club, if the golf ball cannot be accurately put in the intended direction on the green, the score It doesn't lead to up.

  Generally, golf putters include the brate type, pin type, and mallet type depending on the shape of the head, and there are offset, heel shaft, center shaft, etc. depending on the shape and position of the hosel and shaft, and various types are known. However, since the golf ball is rolled from the green or around the green and put into the hole, the feeling when putting with any type of putter is very important.

  By the way, in many putters, the center of gravity of the head is located on the head toe side of the extension line of the center axis of the shaft. Due to its structure, the head toe side is heavier than the heel side as viewed from the shaft center axis, and the head toe is at the time of takeback. The head tends to move more than the heel side with respect to the direction of the play line intended by the side, and the head toe side tends to lag behind the heel side when putting, and the head is difficult to stabilize.

  On the other hand, when the grip is attached to the base end of the shaft, the hand that grips the upper end of the grip, in the case of a right-handed player, contains a metal material in the part that touches the palm of the left hand, and the head toe side of the grip For putters that have a weight difference of 20 to 70 g between the heel side and the heel side, and ensure the stability of operation by reducing the weight ratio between the head toe side and the heel side as seen from the shaft center axis. A grip has been proposed (Patent Document 1).

JP 11-319172 A

  However, the putter grip described in Patent Document 1 contains a metal material so as to provide a weight difference of 20 to 70 g, so that the grip becomes heavy and the overall balance of the putter changes greatly, and the putting feeling is increased. There was a risk that it would cause so-called Yips disease, because the force applied to the gripping hand was completely different.

  In view of such problems, an object of the present invention is to provide a golf club grip in which stable putting can be performed without greatly changing the balance of the entire putter.

  In the grip for a golf club according to the present invention, a weight within a range of 8 g to 15 g is added to a region having an angle within a range of 20 ° to 60 ° around the central axis, and an inertia moment around the central axis is not added. It is characterized in that it is increased in comparison with the moment of inertia.

  One of the features of the present invention resides in that a weight in the range of 8 g to 15 g is added to a region portion having an angle in the range of 20 ° to 60 ° around the central axis.

  As a result, the moment of inertia around the central axis is increased by 10% or more (preferably 15% or less) compared to before the addition, and the head toe side intends the play line direction intended by the head toe during takeback from the heel side. However, the movement of delaying at the time of putting is reduced, and further, the increased weight is about 8 to 15 g, and the balance of the entire club does not change greatly, so that the head can be controlled accurately. In the calculation, the outer diameter of the grip is assumed to be 24 mmφ and the outer diameter of the shaft is assumed to be 14 mmφ. However, if the outer diameter is increased, the moment of inertia is increased, and if the outer diameter is decreased, the moment of inertia is decreased. However, in practice, the outer diameter that the player can hold and play is around 24 mmφ.

  The weight is provided in the region having an angle within the range of 20 ° to 60 ° with the central axis as the center. The addition of the weight of 8 to 15 g increases the moment of inertia by 10% to 15%. This is because the angle range is necessary.

  Since the putter head moves by the length of the shaft compared to the grip, adding a 1g to 2g weight to the putter head greatly changes the feeling of putting, but a weight of about 15g is applied to the grip. Even if it is added, the grip is held by the player's hand and does not move greatly, so the feeling of putting does not change greatly.

  Further, since the head advance and delay can be reduced by increasing the moment of inertia around the shaft center axis, the player can easily control the head without gripping the grip so strongly.

  As a result, the player can perform putting easily without excessively tensing the body, so that compared to the grip described in Patent Document 1, it is difficult to cause so-called Yips disease.

  The cross-sectional outer shape of the grip may be any of a hexagonal shape, a deformed octagonal shape, a circular shape, and a kamaboko shape, and can also be applied to a grip having a known cross-sectional shape. Further, as shown in the embodiments described later, it may be a straight grip having a thickness substantially equal to the longitudinal direction, or may be a grip that becomes thinner toward the tip.

  In particular, when the present invention is applied to a grip having a hexagonal cross section, a square grip is obtained by placing the thumbs of both hands on a flat surface on the side of the hexagonal head toe when gripping the grip in a square. The grip can be gripped with an accurate grip, and it is possible to provide a very easy-to-use putter coupled with the ease of head control by the moment of inertia.

  When the grip of the present invention is applied to a putter, the effect is great. However, the grip of the present invention can be similarly applied to a wood-type club or an iron-type club, and a club that is easy to control the head can be obtained.

  The method of adding weight is not particularly limited. For example, a metal plate may be attached and embedded in the grip, or a metal powder such as barium, tungsten, or boron may be contained in the grip. That is, a metal plate having a weight in the range of 8 g to 15 g is pasted or embedded over an angle having a size in the range of 20 ° to 60 ° around the central axis, or a weight in the range of 8 g to 15 g. Weight can be added by containing and dispersing metal powder.

  The weight is preferably added to the tip side of the grip, but it can also be provided at the center or the base end in the longitudinal direction of the grip, and continuously or spaced from the tip side, the center and the base end. You may make it provide.

  When the grip is attached to the base end of the shaft, the weight added part is any one of the head toe side, head heel side, take back side and putting (including the down swing in the case of a wood type club or an iron type club). The grip should be attached to the shaft so that it is oriented in one direction.

  For example, if the portion to which the weight is added is directed to the head toe side, the head toe side becomes heavier when viewed from the shaft center axis, so when the head hits the golf ball, the weight of the golf ball is not lost. It is possible to obtain a so-called hard-to-defeat putter, wood-type club, and iron-type club.

  Also, if the part with added weight is directed toward the head heel side, the weight of the part acts in a direction that balances the weight of the head with respect to the shaft center axis, so the putter and wood type club that are easy to control the head , You can get an iron-type club.

  Furthermore, if the part with added weight is directed to the takeback side, the club is easily taken back by the weight of the part, and if the part with added weight is directed to the putting or downswing side, the weight of the part is increased. This facilitates putting or downswinging the club.

  The material of the grip is not particularly limited, but a rubber grip is preferable because a metal plate is attached and embedded to disperse the metal powder.

It is a figure which shows an example of the putter which mounted | worn with preferable embodiment of the grip for golf clubs which concerns on this invention. It is sectional drawing which shows the said embodiment. It is sectional drawing which shows other embodiment. It is sectional drawing which shows other embodiment. It is a figure for calculating a moment of inertia. It is a figure which shows an example of the iron-type club which mounted | worn with preferable embodiment of the grip for golf clubs based on this invention.

  Hereinafter, the present invention will be described in detail based on specific examples shown in the drawings. 1 and 2 show a preferred embodiment of a golf club grip according to the present invention. In the figure, a hosel 21 is integrally formed on the heel H side of the putter head 20, the tip of a shaft 22 is coupled to the hosel 21, and the rubber grip 10 of this example is attached to the base end of the shaft 22. Yes.

  The rubber grip 10 has a length L of approximately 30 cm, a cross-sectional outer shape of a hexagonal shape, and is formed into a cross-sectional outer shape having the same size throughout the longitudinal direction (straight grip), and the base end portion of the shaft 22 is fitted in the center. A hole 10A is formed extending in the longitudinal direction. A 10 g metal plate 30 is embedded in the region 11 having an angle α of 60 ° around the shaft center axis at the tip 11 of the rubber grip 10. The portion where the metal plate 30 is embedded is attached to the proximal end portion of the shaft 22 such that the portion facing the toe T of the putter head 20 is directed.

  In the putter to which the rubber grip 10 of this example is attached, the moment of inertia around the central axis of the shaft 22 is increased as compared with that before addition. Then, when the putter is taken back, the center of gravity of the putter head 20 is located on the head toe T side from the extension of the central axis of the shaft 22, so that the toe T side of the putter head 20 is in the direction of the intended play line. Thus, the movement toward the heel side increases compared to before the metal plate 30 is added, and is suppressed due to the moment of inertia around the shaft center axis.

  Further, during putting, the movement of the putter head 20 lagging behind the heel side with respect to the intended play line direction is suppressed due to the increased moment of inertia around the shaft center axis.

  Further, since the putter head 20 moves largely by the length of the shaft 22 as compared with the grip 10, when a weight of 1 g to 2 g is added to the putter head 20, the feeling of putting changes greatly.

  In contrast, in this example, the metal plate 30 added to the rubber clip 10 is 10 g, but even if the 10 g metal plate 30 is added to the rubber grip 10, the rubber grip 10 is gripped by the player's hand and moves greatly. Since the putting feeling does not change significantly, and the overall balance of the putter does not change significantly, head control can be performed accurately.

  In addition, since the moment of inertia around the central axis of the shaft 22 is increased, the advance and delay of the putter head 20 are suppressed, so that the player can easily perform head control without gripping the rubber grip 10 so strongly. As a result, the player can perform putting easily without excessively straining the body, so that it is difficult to cause so-called Yips disease.

  In addition, when gripping the rubber grip 10 in a square, the square grip is formed by placing the thumbs of both hands on the flat surface of the rubber grip 10 on the side of the hexagonal head toe T, so that even beginners can grasp the grip accurately. The rubber grip 10 can be gripped.

  FIG. 3 shows another embodiment. FIG. 3A shows an example in which the cross-sectional outer shape of the rubber grip 10 is a modified octagon formed by a combination of the short side 10B and the long side 10C. FIG. 3B shows an example in which the rubber grip 10 has a circular cross-sectional outer shape.

  FIG. 3C shows an example in which the metal plate 30 is attached to the surface of the rubber grip 10. However, in order to conform to the golf rules, a recess is provided on the surface so that they are flush with each other. FIG. 3D shows an example in which 10 g of metal powder is contained and dispersed in a region having an angle α around the center axis of the shaft of the rubber grip 10. The particle size of the metal powder is not limited as long as it can be dispersed substantially uniformly.

  FIG. 4 shows yet another embodiment. FIG. 4A is an example in which the cross-sectional outer shape of the rubber grip 10 is a modified octagon in which two opposite sides are elongated. FIG. 4B shows an example in which the rubber grip 10 has a cross-sectional outer shape having a flat kamaboko shape with one side made straight, and metal plates 30 are embedded in both side portions of the rubber grip 10. In addition, as long as the conditions described in the claims are satisfied, two weights may be used as in this example.

  FIG. 4C shows an example in which the cross-sectional outer shape is a semi-cylindrical shape with one side being linear, and the metal plate 30 is attached to the surface of the rubber grip 10 so as to be flush with each other.

Here, the moment of inertia of the golf club grip according to the present invention is calculated. In FIG. 5, the rubber grip 10 is made of raw rubber with a length L = 0.28 m and an outer diameter of 24 φm (density of raw rubber P = 1060 kg / m ³ ), and the shaft 22 is made of steel with an outer diameter of 14 φm, a thickness of 0.4 mm. A pipe (steel density Q = 7800 kg / m ³ ) was used, and the metal plate 30 had a width of 10 mm, a thickness of 1 mm, and a weight of 10 g.

Moment of inertia before addition I0 = (28.7 × P + 0.8 × Q) × L × 10 ⁻⁹ = 1.03 × 10 ⁻⁵ (kgm ² )
Moment of inertia after addition I1 == 10.3 × 10 ⁻⁶ + 1.4 × 10 ⁻⁶ = 11.7 × 10 ⁻⁶ (kgm ² )
1.4 × 10 ^-6 /11.7×10 ^-6 ≒ 0.12
The moment of inertia has increased by approximately 12%, and it has been found that the moment of inertia can be significantly increased by a metal plate having a slight weight.

  FIG. 6 shows an example in which the grip in the first embodiment is used for an iron type club. In the figure, the club head 40 is manufactured using a metal material such as soft iron, and a hosel (socket) 41 is integrally formed on the heel H side of the club head 40. The hosel 41 includes the rubber grip 10 of this example. Further, the tip portion of the shaft 22 is fitted, and thus the grip 10 of this example can be similarly applied to an iron-type club and further to a wood-type club.

10 Grip 22 Shaft 30 Metal plate 31 Metal powder

Claims (6)

  Weight (30, 31) in the range of 8g to 15g is added to the region of the angle in the range of 20 ° to 60 ° around the central axis, and the moment of inertia around the central axis is compared to the moment of inertia before addition A golf club grip characterized by being increased as a result.   2. The golf club grip according to claim 1, wherein the cross-sectional outer shape is a hexagonal shape, a deformed octagonal shape, a circular shape or a kamaboko shape.   The golf club grip according to claim 1, wherein the grip is attached to a proximal end portion of the shaft (22) of the putter.   The golf club grip according to claim 1, which is attached to a shaft base end portion of a wood type club or an iron type club.   A metal plate (30) having a weight in the range of 8g to 15g is pasted or embedded over an angle having a size in the range of 20 ° to 60 ° around the central axis, or a weight in the range of 8g to 15g. The golf club grip according to claim 1, wherein a weight is added by containing and dispersing the metal powder (31). The golf club grip according to claim 1, wherein the weight-added portion (11) is attached to the shaft base end portion so as to be oriented in any one of the head toe side, the head heel side, the take back side, and the putting side. .

Images