JPH0640905B2 - Golf club grip - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to golf club grips, and more particularly to improved layered grips.

[Problems to be Solved by Prior Art and Invention]

As a grip to be mounted on a grip mounting portion of a golf club shaft, a rubber grip mainly made of natural rubber and made by vulcanization and a foamed rubber grip have been conventionally known.

The rubber grip is excellent in that it gives a soft feel when gripped, but it is heavy (usually 45 to 50 g),
When mounted on a club shaft, the club has a drawback that it is difficult to swing and it is difficult to increase the head speed. On the other hand, the foamed rubber grip can be lightened in weight (usually 25 to 30 g), but since it is a foamed material, it has drawbacks that its surface is worn or slippery after long-term use.

Therefore, in recent years, a layered grip having an inner-outer two-layer structure has been proposed. This type of grip is disclosed, for example, in Japanese Utility Model Laid-Open No. 53-12061. In this known grip, since the inner layer is the foam layer having rubber-like elasticity and the outer layer is the soft rubber layer, the drawbacks of the rubber grip and the foam rubber grip described above can be eliminated.

FIG. 3 shows an example of the layered grip. A grip 13 is attached to the grip mounting portion at the rear end of the club shaft 11, and the outer diameter of the grip inner layer 14 is gradually increased in a taper shape from the front end side of the grip toward the rear end. On the other hand, the tubular portion of the outer grip layer 15 is formed to have a substantially uniform thickness, and the outer diameter of the tubular portion of the outer grip layer 15 is equal to that of the grip 13.
The taper is gradually increasing from the front end to the rear end. The outer surface of the grip outer layer 15 may be provided with a groove pattern, a surface pattern or the like, if necessary.

As described above, the conventional layered grip 13 has a rear end having a large diameter and a front end having a small diameter. Therefore, when the outer grip layer is detachable, the inner grip layer having a larger diameter than the distal end of the outer grip layer 15 is formed. 14 From the rear end side, the grip outer layer
It is not easy to mount 15, and in order to forcibly expand the tip of the outer grip layer 15, the rear end of the inner grip layer 14 may be broken or the tip of the outer grip layer 15 may be cracked. Was becoming.

[Means for Solving the Problems]

As a means for solving the above problems, the present invention provides that the outer diameter of the inner layer of the grip is gradually increased from the tip of the grip to the center of the grip, and the diameter of the grip is tapered from the center of the grip to the rear of the grip. Is gradually reduced to a small diameter,
The grip of the golf club is characterized in that the outer diameter of the grip exterior is gradually increased in a taper shape from the front end to the rear end of the grip.

[Action]

According to the present invention, the outer grip layer can be attached to the inner grip layer without being forcibly expanded, the grip is prevented from being damaged, and the attached outer grip layer can be easily removed.

〔Example〕

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

1 and 2 show an embodiment of the present invention. Referring to these drawings, the head 12 is attached to the tip of the club shaft 11, and the club shaft 11
A grip 13 is attached to the grip mounting portion at the rear end. As shown in FIG. 1, the grip 13 is a tubular shape made of a grip inner layer 14 made of a lightweight member such as urethane foam, foam rubber, or corfu, and an elastic member such as vulcanized molded rubber mainly composed of natural rubber. The outer layer 15 of the grip is provided. The rear end of the tubular portion of the outer grip layer 15 is closed by a bottom portion 16 having a hole 17 in the center.

Further, the outer diameter of the grip outer layer 15 is gradually increased from the front end to the rear end of the grip 13 in a tapered shape,
The outer diameter of the inner grip layer 14 is gradually increased from the center of the grip 13 to the center of the grip 13, and is gradually reduced from the center of the grip 13 to the rear of the grip 13.

In addition, the inner diameter of the tip of the outer grip layer 15 is
It is made slightly smaller than the outer diameter of the rear end portion of 14 and the difference in radius between them is about 2 mm, and when the outer layer is mounted on the inner layer, the size is within a range in which both can be mounted by elastic deformation of the outer layer.

4 to 6 show an example of a method for manufacturing the above grip. With reference to these figures, in order to form the grip inner layer 14 on the grip mounting portion of the club shaft 11, as shown in FIG. 4, the grip mounting portion of the club shaft 11 is held in a pair of molds 18 and 19. . in this case,
Insert the plug 20 into the rear end opening of the shaft 11 and
If the shaft is held between the molds 18 and 19, the shaft 11 can be easily stabilized with respect to the molds 18 and 19.

Next, the raw material of the grip inner layer 14 is injected into the molds 18 and 19, and the raw material is preferably foamed in the molds 18 and 19 to produce the shaft 11
As shown in FIG. 5, an inner grip layer 14 is formed on the outer surface of the mold by molding. In this way, since the grip inner layer 14 is formed directly on the surface of the shaft 11, the core metal is not required,
The cost can be reduced. Further, according to such a manufacturing method, the grip inner layer 14 can be firmly fixed and formed on the outer periphery of the shaft 11, but if necessary, the surface of the shaft 11 is provided with irregularities to form the grip. Relative movement between the grip inner layer 14 and the shaft 11 may be surely prevented.

Next, as shown in FIG. 6, the grip inner layer 14 is inserted into the grip outer layer 15 which is formed separately from the grip inner layer 14, and the grip inner layer 14 and the grip outer layer 15 are fixed to each other. In this case, although not shown, a double-sided adhesive tape is attached to the outer surface of the grip inner layer 14, or an adhesive is applied to the outer surface of the grip inner layer 14, and volatile oil is applied to the outer surface. Attach it and make it slip well before attaching the grip. In this way, the inner grip layer 14 is replaced by the outer grip layer 15
The inner grip layer 14 and the outer grip layer 15 can be separably fixed to each other with the double-sided adhesive tape or the adhesive.

The method for separating the fixed inner layer 14 and outer layer 15 from each other is as follows.

Inject volatile oil between the grip 13 and the double-sided tape with a syringe to remove the grip 13.

Blow air from the rear end of the grip 13. Then, an air film is formed between the grip 13 and the double-sided tape, and the grip 13 can be pulled out.

If a thin grip is desired, the inner layer of the grip
14 or the outer grip layer 15 may be formed thin.

Since the grip 13 having the above-described configuration includes the grip inner layer 14 made of a lightweight member, the grip 13 becomes lightweight,
The weight of the entire club can be reduced. Therefore, swinging out of the club becomes easy, and the head speed during the swing can be increased. Moreover, since the outer grip layer 15 is detachably fixed to the inner grip layer 14, only the outer grip layer 15 can be removed and replaced.

In the case of the embodiment shown in FIG. 1, as compared with the grip shown in FIG. 3 of the conventional example, the outer diameter of the grip inner layer 14 is smaller at the rear end side of the grip 13, so that the grip outer layer 15 with respect to the grip inner layer 14 is smaller. The work of fitting is easy. Further, since the thickness of the outer grip layer 15 becomes thicker on the rear end side than the center of the grip 13, the hand arm side when the grip 13 is gripped has a soft feel and can be gripped firmly.

Although the illustrated embodiments have been described above, the present invention is not limited to the embodiments described above. For example, the grip inner layer 14 may be fitted and fixed to the grip mounting portion of the club shaft 11 after molding. Also, the grip inner layer 14
Roughness for preventing relative movement may be formed on the contact surface of the grip outer layer 15 and the grip outer layer 15.

〔The invention's effect〕

According to the present invention, since the top of the outer diameter of the inner layer of the grip is at the center of the inner layer, the resistance when attaching and detaching the grip is only about half of the grip length, which facilitates attachment and detachment and prevents damage to the grip. Moreover, as in the case of the reference, no special tool is required when inserting the grip, and no post-processing is required, so that even general users can easily replace the grip.

[Brief description of drawings]

1 is a sectional view of the grip portion of a golf club taken along the line AA in FIG. 2 showing an embodiment of the present invention, FIG. 2 is a front view of the entire golf club, and FIG. 3 is a conventional example. FIG. 4 is a sectional view of a golf club grip portion, FIG. 4 is a view showing a manufacturing process of a grip inner layer for a club shaft, FIG. 5 is a front view showing a state where a grip inner layer is formed on a club shaft, and FIG. 6 is a grip inner layer. It is a partial cross-sectional front view which shows the process of fitting the grip outer layer. 11… Club shaft, 12… Head, 13… Grip, 14… Grip inner layer, 15… Grip outer layer.

Claims (4)

[Claims] 1. A grip inner layer made of a lightweight member is fixedly formed on a grip mounting portion of a club shaft, and the grip inner layer is inserted into a cylindrical outer grip layer made of an elastic member formed separately from the grip inner layer. In a grip of a golf club in which the outer grip layer and the inner grip layer are separably fixed, the outer diameter of the inner grip layer is gradually increased in a taper shape from the tip of the grip to almost the center, and The grip has a gradually decreasing diameter from the center to the rear end, and the outer diameter of the outer layer of the grip gradually increases from the front end to the rear end of the grip. Golf club grip to do. 2. An inner diameter of a tip portion of the grip outer layer is smaller than an outer diameter of a rear end portion of the grip inner layer, and a difference between the radii of the two when the outer grip layer is attached to the inner grip layer. The grip for a golf club according to claim 1, wherein the grip outer layer is elastically deformed to have a size within a range in which the both can be mounted. 3. The lightweight member of the grip inner layer is made of urethane foam, foam rubber or cork, and the elastic member of the grip outer layer is vulcanized rubber. Golf club grip. 4. The grip of a golf club according to claim 1, wherein the inner grip layer and the outer grip layer are separably fixed by a double-sided adhesive tape or an adhesive material.