JP2012110404A - Golf club grip - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a golf club grip which is improved in the gripping feeling and the ball hitting directivity, and in which the force for bonding the grip to the shaft is strong.SOLUTION: In the golf club grip having a double construction in which a cylindrical inner made of rubber is covered with a cylindrical outer made of rubber having lower hardness than the cylindrical inner, the cylindrical inner is formed in a length 1 to 4 cm longer than the length of a half of the entire length of the grip and formed harder than the cylindrical outer, a plurality of longitudinal projecting strips is formed on the outer peripheral surface of the cylindrical inner at fixed intervals in the circumferential direction thereof, and extended from the proximal end side thereof to a portion of 70 to 80% of the entire length thereof along the axis line direction thereof, a plurality of circumferential grooves is formed at fixed intervals in the axis line direction, on the outer peripheral surface of a portion covering a portion of the cylindrical outer in which the longitudinal projecting strips are formed, and a plurality of longitudinal grooves is formed on the outer peripheral surface on the distal end side of the circumferential grooves of the cylindrical outer.

Description

  The present invention relates to a structure of a golf club grip.

  In general, a golf club is composed of a head, a shaft, and a grip. A conventional grip is made of rubber mainly composed of natural rubber, for example. By constructing grips from these materials, it is possible to improve the grip sensation (gripping comfort) when a golfer grips a golf club, improve the grip prevention effect, and improve the resistance to grip deterioration. Yes.

  As shown in Japanese Patent Application Laid-Open No. 62-9476, the grip attached to the shaft has a two-layer structure including an inner layer portion and an outer layer portion, and the inner layer portion is softer than the outer layer portion over the entire length of the grip. Or, as disclosed in Patent Document 2 (Japanese Utility Model Publication No. 62-82066), the inner layer portion is made of a material harder than the outer layer portion over the entire length of the grip, thereby improving grip comfort. The intended grip is known.

  In general, when a golfer grips the grip of a golf club, hold the base of the grip (hand side) with one hand as the axis for swinging, and attach the other hand to the tip of the grip with this palm. It captures the feel of a ball. Therefore, if the grip is soft, the feel of the hit ball is not transmitted well, while if the grip is hard, the hand does not get used to the hand, and the strong hit ball vibration is transmitted to the hand that is the axis of the swing and adversely affects the wrist and elbow. Has been pointed out.

  The grip described in Patent Document 1 has a drawback that it is difficult to capture the hitting ball feeling with a hand gripping the tip side thereof, and the grip disclosed in Patent Document 2 is not easily adapted to a hand gripping the base end side of the grip, and is large. There were problems such as hitting ball vibration being transmitted to the elbow.

  In addition, the way of gripping the golf club (how to grip) is very important in controlling the shot height, flight distance, and direction. And there are various ways to grip, such as Verdon grip, interlock, etc. In either case, when gripping the base end side of the grip with one hand as the axis of swing, attach the thumb on the grip to stabilize the golf club The direction of the golf club.

  In addition, the hand attached to the tip of the grip provides a good feel for the shot, and it is comfortable to grip and does not transmit strong hitting vibrations to the wrist or elbow of the hand holding the base of the grip. A grip has been developed that actively prevents shot hooking and slicing by supporting the abdomen (see Patent Document 3). In a golf club grip having a two-layer structure of an inner layer portion and an outer layer portion, the inner layer portion on the proximal end side of the grip is formed of a softer material than the outer layer portion, and the inner layer portion on the distal end side of the grip Is formed of a material harder than the outer layer portion.

  Moreover, the thing of patent document 4 is also known as a grip made from a silicone resin instead of a rubber grip. This grip is a grip that can suppress the deviation of the collision angle between the head face and the ball. Conventionally, it has been considered that the deviation in the hitting direction is mainly caused by the twisting of the shaft. However, even if the torsional rigidity of the shaft is improved, a phenomenon occurs in which the hitting ball direction deviates from the direction intended by the golfer. In studying the cause of this phenomenon, we focused on the fact that the grip, which is a component of golf clubs, is much more elastic than the shaft. In other words, although it is clear that the impact force causes torsional deformation of the shaft, the deviation of the collision angle between the head face and the ball is largely dependent on the elastic deformation of the grip due to the impact force. As a result, the grip described in Patent Document 4 was developed.

  The invention of Patent Document 4 includes a cylindrical inner made of a first resin and a second resin having a lower hardness than the first resin so that the cylindrical inner is covered with the cylindrical inner as an insert member. A grip for a golf club having a molded cylindrical outer, and an engagement protrusion that engages with the cylindrical outer is provided on the outer peripheral surface of the cylindrical inner, and the engagement protrusion is first in the circumferential direction. Are juxtaposed at a pitch of 2 mm and are juxtaposed at a second pitch in the longitudinal direction.

Japanese Utility Model Publication No. Sho 62-9476 Japanese Utility Model Publication No. 62-82066 Utility Model Registration No. 25333541 JP 2010-188019 A

  The grip described in Patent Document 3 eliminates the disadvantages of the grips described in Patent Documents 1 and 2, and the base end side of the grip gripped with a hand that is the axis of swing (left-handed person is a soft material) Because the inner layer part made of is deformed, the grip can be gripped securely and comfortable to grip, and the hand on the tip side (right hand) can feel the shot feeling from the inner layer part made of hard material. However, further improvements in grip and hitting direction have been desired.

  The grip described in Patent Document 4 is not made of rubber but is made of silicone resin, and the torsional rigidity is improved as compared with the rubber grip. However, when attached to the shaft, the mounting solvent (white gasoline) does not readily evaporate. One week after grip installation, the grip was cut and the contact point with the shaft was observed. As a result, the inner peripheral surface of the grip was wet (the solvent was not sufficiently evaporated). That is, there was a difficulty in adhesion with the shaft.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a golf club grip in which a grip feeling and a hitting ball directivity are improved and an adhesive force with a shaft is strengthened.

  In order to achieve the above-mentioned object, the present invention relates to a dual-structure golf club grip in which a rubber cylindrical inner is covered with a rubber cylindrical outer having a lower hardness than that of the cylindrical inner. Is formed to be 1 to 4 cm longer than the half length of the entire grip and harder than the cylindrical outer, and is 70 to 80% of the total length from the base end side along the axial direction of the cylindrical inner A plurality of vertical ridges are formed on the outer peripheral surface at regular intervals in the circumferential direction, and circumferential grooves are formed at regular intervals in the axial direction on the outer peripheral surface of the cylindrical outer portion covering these vertical ridge formation portions. A plurality of vertical grooves are formed, and a plurality of vertical grooves are formed on the outer peripheral surface on the tip side of the peripheral groove of the cylindrical outer.

  According to the present invention, in a dual-structure golf club grip in which a rubber cylindrical inner is covered with a rubber cylindrical outer having a hardness lower than that of the cylindrical inner, the length of the cylindrical inner is set to the overall length of the grip. 1 to 4 cm longer than half of the length of the tube, and harder than the cylindrical outer, and the vertical ridge for a length of 70 to 80% of the total length from the base end side along the axial direction of the cylindrical inner Are formed at regular intervals in the circumferential direction on the outer circumferential surface, and a plurality of circumferential grooves are formed at regular intervals in the axial direction on the outer circumferential surface of the cylindrical outer portion covering these vertical ridge forming portions. Since a plurality of vertical grooves are formed on the outer peripheral surface on the tip side of the peripheral groove of the cylindrical outer, the cylindrical outer and the cylindrical inner can be integrated, and the combination of the vertical protrusion and the peripheral groove To prevent twisting of the entire grip. And capable of resisting grip proximally relative centrifugal force of the swing time of the head by the presence of circumferential groove. Therefore, the grip comfort on the grip base end (the part that the right-handed person grips with the left hand) is harder than the grip comfort on the grip front end (the part gripped with the right hand), and the part gripped with the left hand that becomes the axis during swing ( The twist on the base end side) is reduced, the directionality of the hitting ball is improved, and the cylindrical outer is soft, so that the bad influence of the hitting ball vibration is less likely to occur. In addition, the cylindrical inner is made of rubber, and when the grip is fixed to the shaft using a common mounting solvent (white gasoline) and double-sided adhesive tape, the solvent evaporates in a short time, and the time is about half a day or less. As a result, the grip and the shaft are firmly fixed.

A perspective view showing a cylindrical inner and a cylindrical outer Front view of tubular inner Cross section of the finished grip

  Embodiments of the present invention will be described below with reference to the drawings.

  In FIG. 1, the cylindrical inner 1 and the cylindrical outer 2 are shown, and both are made of rubber. First, the cylindrical inner 1 is molded, the cylindrical inner 1 is set as an insert member in the mold, and the cylindrical outer 2 is molded so as to cover the cylindrical inner 1. In FIG. 1, it is shown as being molded separately, but for convenience of explanation, when the cylindrical outer 2 is molded, the cylindrical inner 1 is covered with the cylindrical outer 2. It will be.

  The rubber as the molding material is mainly composed of natural rubber (NR). For example, NR80 to 100 parts by weight, SBR (styrene butadiene rubber) or EPDM 0 to 20 parts by weight, antiaging agent 1 part by weight, stearin 1 part by weight, carbon black 10-30 parts by weight, softening material 5-10 parts by weight, processing aid 2 parts by weight, zinc white 5 parts by weight, vulcanization accelerator 1-2 parts by weight, vulcanization accelerator 0 The rubber compounded in 5 parts by weight and 1-2 parts by weight of sulfur is vulcanized into a grip shape. In the cylindrical inner 1 and the cylindrical outer 2, the composition of the rubber compound is changed to form the cylindrical inner 1 hard. Therefore, in the cylindrical inner 1, SBR with an amount of styrene of 50% or more may be used. The cylindrical outer 1 is composed of 45 to 90 parts by weight of a diene rubber, 5 to 30 parts by weight of an ethylene-propylene binary copolymer and / or an ethylene-propylene-diene terpolymer, and 5 to 25 weights of chlorobutyl rubber. A rubber compound containing a rubber part can be suitably molded and vulcanized, and the diene rubber is at least selected from the group consisting of natural rubber, isoprene rubber, styrene-butadiene rubber, nitrile-butadiene rubber and chloroprene rubber. One type is preferable. By using such a rubber compound, the coefficient of dynamic friction is high, it is difficult to slip, it is excellent in wear resistance and weather resistance, and therefore durability is long and life is long. Furthermore, it was excellent in low-temperature characteristics, and the temperature stability of various characteristics was good, there was no stickiness, and the moist feel when grasped was extremely good. In addition, the grip end 3 was colored using silica and talc as a reinforcing agent instead of carbon black and adding a pigment. Moreover, in order to raise hardness, you may add 5-20 weight part resin of SBR (high styrene SBR) whose amount of styrene is 50% or more.

  2, the cylindrical inner 1 has a length of 8 to 11 cm on the outer peripheral surface on the grip end 3 side, a thickness (projection height) of 0.2 to 0.6 mm, and a width. A plurality of 0.6 to 1.5 mm vertical protrusions 4 are formed, and the interval between the two vertical protrusions 4 on the grip end 3 side is set to 3 mm. The grip end 3 is formed of a rubber composition harder than the cylindrical inner 1 and is integrated with the cylindrical inner 1. Further, a ridge 5 is formed on the distal end side of the cylindrical inner 1 (occupying a length of one quarter to one fifth of the entire length of the cylindrical inner 1).

  The grip end 3 has a hardness of JIS K 6253 Type A (hereinafter, the same JIS standard) of 65 to 75, the hardness of the cylindrical inner 1 is 65 to 75, and the hardness of the cylindrical outer 2 is 40. ~ 50. The value of such hardness is not limited, and it is sufficient that the cylindrical outer 2 is softer than the cylindrical inner 1 as a physical property.

  A plurality of circumferential grooves 6 are formed on the outer peripheral surface of a portion of the cylindrical outer 2 that covers the portion of the cylindrical inner 1 where the vertical protrusions 4 are formed. These circumferential grooves 6 are thin grooves having a groove width of about 0.1 to 0.3 mm, and are juxtaposed at intervals of about 1.5 mm in the axial direction. A large number of oblique grooves 7 are formed so as to cross the circumferential grooves 6. Although these grooves 6 and 7 prevent slipping, the circumferential groove 6 is also for facilitating the force that opposes the grip portion against the head centrifugal force during swing. In addition, a plurality of vertical grooves 8 are formed on the outer peripheral surface on the tip side of the peripheral groove 6 of the cylindrical outer 2, and many oblique grooves 9 are formed so as to cross the vertical grooves 8. .

  The total length of the cylindrical inner 1 is formed to be 1 to 4 cm longer than half of the total grip length (the total length including the grip end 3). If the cylindrical inner 1 has a length exceeding 4 cm rather than half of the total length, the total weight of the grip increases. Even if the cylindrical inner 1 is made longer than necessary, the function as a grip is not improved.

There is a slight gap between the circumferential groove 6 and the vertical groove 8 of the cylindrical outer 2, and this gap S ₂ corresponds to the gap S ₁ from the tip of the cylindrical inner 1, and above and below the gap S ₂ . An annular groove 10 is formed.

  As shown in FIG. 3, the grip end 3 is formed with a fitting portion 3 </ b> A and a flange portion 3 </ b> B, and the fitting portion 3 </ b> A is fitted and fixed to the rear end of the tubular inner 1. The outer diameter of the flange portion 3 </ b> B is formed to be the same as the outer diameter on the base end side of the cylindrical outer 2. A shaft (not shown) is inserted into the hollow portion surrounded by the inner wall 1A of the cylindrical inner 1 and the hollow portion surrounded by the inner wall 2A of the cylindrical outer 2, and a grip is attached to the shaft. To fix the shaft to the grip, a double-sided adhesive tape is applied to the shaft, a mounting solvent is applied to the tape and the inner wall surface of the shaft, and the shaft is quickly inserted into the hollow portion of the grip. When the grip was opened after 10 hours, the inner wall surface of the grip and the tape were in a dry state.

  The thickness of each of the cylindrical inner 1 and the cylindrical outer 2 is such that the thickness of the cylindrical inner 1 is thicker than the thickness of the cylindrical outer 2 at least covering the cylindrical inner 1. Yes. The impact force when the golfer hits the ball gives torsional deformation to the grip, but greatly depends on the deformation of the soft cylindrical outer 2. However, since the hard and thick tubular inner 1 is covered with the soft and thin tubular outer 2, the overall torsional rigidity as a grip is improved. Moreover, the vertical protrusion 4 formed in the cylindrical inner 1 also contributes to the improvement of the torsional rigidity of the grip. If the torsional rigidity is improved, the hitting directionality is also improved.

DESCRIPTION OF SYMBOLS 1 Tubular inner 2 Tubular outer 4 Vertical protrusion 6 Circumferential groove 8 Vertical groove

Claims (2)

In a golf club grip having a double structure in which a rubber cylindrical inner is coated with a rubber cylindrical outer having a lower hardness than that of the cylindrical inner,
While forming the length of the cylindrical inner to be 1 to 4 cm longer than the half length of the entire grip, it is formed to be harder than the cylindrical outer,
A plurality of vertical ridges having a length of 70 to 80% of the total length from the base end side along the axial direction of the cylindrical inner are formed on the outer peripheral surface and at regular intervals in the circumferential direction,
A plurality of circumferential grooves are formed at regular intervals in the axial direction on the outer peripheral surface of the cylindrical outer portion covering these vertical ridge forming portions,
A golf club grip characterized in that a plurality of longitudinal grooves are formed on the outer peripheral surface on the tip side of the peripheral groove of the cylindrical outer. 2. The golf club according to claim 1, wherein a thickness of the cylindrical inner and a portion of the cylindrical outer covering the cylindrical inner is such that the cylindrical inner is thicker than the cylindrical outer. Grip.

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