JP2007222445A - Golf club - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a golf club equipped with a grip which is easily replaced, can be reused by recycling, and can obtain the degree of freedom of design. <P>SOLUTION: In the golf club equipped with a shaft and the grip which is fixed to the grip part of this shaft by a binding material, for the grip, an air vent hole is formed in a shaft insertion hole in the shape of a closed-end, into which the grip part can be inserted, and a grip end, and a plurality of axial grooves, of which one end side is located near the opening of the shaft insertion hole and which is formed along a grip axial direction, and a communicating groove which communicates between each of the a plurality of axial grooves and the air vent hole, are provided in the inner periphery of the shaft insertion hole. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a golf club, and more particularly to a golf club with an improved grip attached to a grip portion of a golf club shaft.

  Conventionally, a leather club grip has been used in which a leather club is rubbed into a tape shape and wrapped around a golf club shaft (hereinafter referred to as “shaft”). As a result, rubber grips made of natural rubber, synthetic rubber, foams, etc. have been widely used recently because they are easy to attach to the shaft and have excellent durability. The grip of the golf club was adjusted with the elasticity and thickness of the rubber grip.

Thus, the rubber grip is attached to the shaft after wrapping double-sided adhesive tape or adhesive tape around the shaft grip, and then volatile such as thinner inside the tape insertion hole inside the shaft insertion hole provided in the rubber grip. A method of applying a high solvent, inserting the grip portion into the shaft insertion hole, and leaving it for a while until the solvent volatilizes is employed.
Since this type of rubber grip is formed in a predetermined shape in advance, if the grip thickness, hardness, length, shape (taper angle), etc. do not fit the user's hand, the grip is replaced. However, in recent years, there has been an active movement to prevent pollution of the living environment, one of which is waste disposal, and it is widely considered to contribute to that end by recycling.

Therefore, recycling of grips by recycling has been proposed even in the above-described grip replacement.
However, in the past, the grip has been removed by cutting the grip with a cutting tool and peeling it off, or by pouring a solvent into the joint surface between the shaft and the grip to melt and soften the adhesive again and pull out the grip. A method such as attaching to the shaft is used.

And in patent document 1, when inject | pouring a solvent into the joint surface of a shaft and a grip, the spray needle is penetrated to a grip, and the spray type solvent sealed with pressure gas like Freon gas is sprayed on both surfaces. A method for attaching and detaching a grip for melting and softening an adhesive of an adhesive tape is disclosed.
Patent Document 2 discloses a method of injecting a solvent from the injection port to the joint surface between the shaft and the grip by providing an injection port on the side surface of the grip for adjusting or exchanging the thickness of the grip. Yes.
JP-A-52-143126 Japanese Unexamined Patent Publication No. 7-308412.

However, as described above, the conventional method of cutting and peeling off the grip with a cutting tool cannot be reused by recycling the grip, and the actual condition is that the peeled grip is treated as waste. It is.
In addition, the method for attaching and detaching the grip disclosed in Patent Document 1 allows the spray needles to pass through several positions of the grip so that the solvent is injected into the entire joint surface between the shaft and the grip, so that a plurality of through holes are formed and the grip hardness is increased. However, it has been pointed out that it cannot be recycled and reused due to changes in its durability and deterioration in durability. Furthermore, there is a possibility that the shaft may be damaged by the spray needle.

On the other hand, in the conventional example of Patent Document 2, the grip provided near the injection port is not comfortable due to the structure in which the injection port is provided on the side surface of the grip, and the vicinity of the injection port is liable to deteriorate, resulting in poor durability. It was.
However, since the injection port is provided on the side surface of the grip, there is a design limitation on the shape and pattern of the surface, and it is difficult to improve the gripping property.
The present invention has been devised in view of such circumstances, and it is an object of the present invention to provide a golf club equipped with a grip that can be easily replaced and can be reused by recycling and has a degree of design freedom.

  In order to achieve such an object, the invention according to claim 1 is a golf club comprising a shaft and a grip fixed to the grip portion of the shaft by an adhesive material, and the grip is inserted into the grip portion. Possible bottomed shaft insertion hole and air vent hole formed at the grip end, one end side is located near the opening of the shaft insertion hole and formed along the grip axis direction on the inner periphery of the shaft insertion hole A plurality of axial grooves and communication grooves that communicate the axial grooves and the air vent holes are provided.

  The invention according to claim 2 is a golf club comprising a shaft and a grip fixed to the grip portion of the shaft by an adhesive material, and the grip has a bottomed shape into which the grip portion can be inserted. A plurality of axial grooves in which a shaft insertion hole is formed, one end of the shaft insertion hole is located in the vicinity of the opening of the shaft insertion hole, and the other end side is connected via a connection groove formed in the circumferential direction Is formed along the grip axis direction.

  The invention according to claim 3 is the golf club according to claim 1 or 2, wherein the golf club is formed in a circumferential direction on one end side of the axial groove located near the opening of the shaft insertion hole. A connecting groove for connecting the axial grooves is provided, and the invention according to claim 4 is the golf club according to claim 3, wherein the outer periphery of the grip on the grip head side with respect to the connecting groove is provided. Further, a circumferential groove is provided.

According to the first aspect of the present invention, when the grip is replaced, the solvent is injected and discharged by the opening of the shaft insertion hole and the air vent hole. Recycling with improved grip and durability is possible.
Similarly, according to the invention according to claim 1, since the solvent is injected and discharged at the opening of the shaft insertion hole at the time of grip replacement work, the degree of freedom in designing the side surface of the grip can be obtained as compared with the conventional case. Recycling with improved grip and durability is possible.

  And, according to the invention according to claim 3, since the connecting groove connected to the plurality of axial grooves is provided, it is easy to inject and fill the solvent into the plurality of axial grooves at the time of replacement work, and the workability is improved. Further, according to the invention of claim 4, the provision of the circumferential groove has an advantage that the grip head side can be easily folded and held in the folded state, and the workability can be greatly improved.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1 to 9 show a golf club and a rubber grip used therefor according to one embodiment of claims 1, 3 and 4, which are formed of fiber reinforced resin or metal as shown in FIG. A head 3 is attached to the tip of the shaft 1, and a rubber grip 5 made of natural rubber, synthetic rubber, foam or the like is attached to a grip portion on the rear end side of the shaft 1 to constitute a wood golf club (driver) 7. ing.

  FIGS. 2 to 8 show details of the rubber grip 5. The rubber grip 5 is made of natural rubber, butadiene rubber, styrene butadiene rubber or the like alone or synthesized so that the grip end 9 is connected to the grip head 11 as shown in FIG. The outer shape of the taper is gradually reduced in diameter, and the surface thereof is provided with unevenness (not shown) for preventing slipping and improving gripping properties.

Further, as shown in FIGS. 3 and 4, a bottomed shaft insertion hole 15 into which the grip portion 13 of the shaft 1 is inserted is provided from the grip head 11 toward the grip end 9. Is provided with an air vent hole 17 communicating with the shaft insertion hole 15.
The shaft insertion hole 15 is dimensioned so as to be in close contact with the surface of the grip portion 13 in order to prevent the intrusion of foreign matter and the rubber grip 5 from peeling off, but the shaft insertion hole as shown in FIGS. A plurality of (9 in the present embodiment) straight axial grooves 21 whose one end side is located in the vicinity of the opening 19 of the shaft insertion hole 15 are provided on the inner periphery of the shaft 15 along the grip head direction. To the grip end 9 at equal intervals and with the same dimensions. Further, as shown in FIG. 7, the depth t of the axial groove 21 is set to 1/3 or less (t <1/3) of the thickness of the rubber grip 5 so as not to impair the gripping property of the rubber grip 5. Further, the width w of the axial groove 21 is set to 1/3 or more and 1/2 or less (1/3 ≦ w ≦ 1/2) with respect to the circumferential length of the shaft 1.

In the present embodiment, the plurality of axial grooves 21 are formed in a straight shape, but the axial grooves 21 may be formed in a spiral shape.
As shown in FIGS. 3, 4, and 8, nine communication grooves 23 are formed on the inner periphery of the grip end 9 around the air vent hole 17 from the grip head 11 side to the grip end 9. The formed axial grooves 21 are provided radially, and each axial groove 21 communicates with the air vent hole 17 via a communication groove 23.

Further, as shown in FIG. 4, one end side of each axial groove 21 located in the vicinity of the opening 19 of the shaft insertion hole 15 is located inward with a gap a of 5 to 20 mm from the grip head 11. In the inner periphery of the shaft insertion hole 15, a connecting groove 25 that connects one end side of each axial groove 21 is formed in the circumferential direction with the same dimensions as the circumferential length and depth of the axial groove 21. Yes.
Further, an outer peripheral groove (circumferential groove) 27 is provided on the outer periphery of the rubber grip 5 on the grip head 11 side from the connecting groove 25 in the circumferential direction. As described above, when the rubber grip 5 is exchanged, the grip head 11 side can be easily folded and the folded state can be maintained.

The rubber grip 5 of the present embodiment is configured as described above. To attach the rubber grip 5 to the shaft 1, first, a double-sided adhesive tape is wound around the grip portion 13 of the shaft 1 as in the prior art.
Note that a liquid adhesive may be applied to the grip portion 13 instead of the double-sided adhesive tape. Further, as described above, since the grip head 11 side is folded back when the rubber grip 5 is replaced, it is necessary to wind the double-sided adhesive tape so that the range from the grip head 11 to the connecting groove 25 is not adhered to the shaft 1. is there.

  Next, on the surface of the double-sided adhesive tape wound around the grip part 13 and the inner periphery of the shaft insertion hole 15 of the rubber grip 5, highly volatile such as thinner is used to temporarily reduce the viscosity of the double-sided adhesive tape. After the solvent is sprayed or applied and the grip portion 13 is inserted into the shaft insertion hole 15, the rubber grip 5 is attached to the grip portion 13 by leaving it for a while until the solvent volatilizes.

On the other hand, when the rubber grip 5 attached in this way is exchanged without fitting to the user's hand, first, the grip head 11 side is folded back to the connecting groove 25 as shown in FIG. As a result, the connecting groove 25 is exposed and opened in a concave shape along the surface of the grip portion 13.
As described above, the rubber grip 5 is not easily bonded to the grip portion 13 in the range from the grip head 11 to the connecting groove 25, and the outer peripheral groove 27 is provided. The range from the grip head 11 to the connecting groove 25 can be folded outward and the folded state is maintained.

Next, when the solvent S is sequentially injected and filled from the nozzle 31 of the inflow device 29 filled with the solvent S into the connecting groove 25 opened along the surface of the grip portion 13 as shown in FIG. After being held in the groove 25, it flows down sequentially into the axial grooves 21 connected to the groove 25.
Although not shown, when the solvent S is injected and filled, air may be sent by a compressor or the like to promote the flow of the solvent S into the axial grooves 21, and thus flowed into the axial grooves 21. The solvent S is discharged to the outside from the air vent hole 17 through each communication groove 23 provided in the grip end 9.

  In this way, while the solvent S is discharged from the air vent hole 17, the solvent S is injected and filled in the entire axial groove 21, and then the injection and filling are stopped. The solvent S is bonded on both sides with the rubber grip 5 as a whole. The shaft 1 (grip part 13) can be pulled out by penetrating the entire surface of the tape. At this time, air is fed from the opening 19 side of the shaft insertion hole 15 or the air vent hole 17 side by a compressor or the like to peel off the adhesive surface. If the shaft 1 is pulled out, the operation can be easily performed.

Although not shown, if the connecting groove 25 is provided in the middle of the shaft insertion hole 15 (an intermediate portion in the front-rear direction of the axial groove 21), the filling of the axial groove 21 with the solvent S is further promoted. The
Thus, the rubber grip 5 of the present embodiment performs the injection and discharge of the solvent S through the opening 19 of the shaft insertion hole 15 and the air vent hole 17 during the replacement work. Therefore, unlike the conventional examples of Patent Documents 1 and 2, The degree of freedom in designing the side surface of the rubber grip 5 can be obtained, and reuse by recycling with improved gripping and durability becomes possible.

In addition, since the connecting groove 25 connected to the plurality of axial grooves 21 is provided on the inner periphery of the shaft insertion hole 15, it is easy to inject and fill the solvent S into the plurality of axial grooves 21 during replacement work. Combined with the fact that the outer peripheral groove 27 is provided to facilitate the folding back of the grip head 11 side and to maintain the folded state, there is an advantage that the workability is remarkably improved as compared with the prior art.
FIG. 10 is a cross-sectional view of a rubber grip attached to a golf club according to one embodiment of claims 2 to 4. The rubber grip 5-1 according to this embodiment has the same shape as the axial groove 21. A plurality of axial grooves 21-1 are formed at equal intervals and in the same dimension from the vicinity of the opening 19 of the shaft insertion hole 15 to the vicinity of the grip end 9, and the ends of the axial grooves 21-1 on the grip end 9 side. Further, connecting grooves 33 that connect the respective axial grooves 21-1 are formed in the circumferential direction.

In addition, since the other structure is the same as that of the said rubber grip 5, the same code | symbol is attached | subjected to the same thing and those description is abbreviate | omitted.
The rubber grip 5-1 of this embodiment is configured as described above, and the attachment to the shaft 1 may be performed in the same manner as the rubber grip 5.
When the rubber grip 5-1 is replaced, first, the grip head 11 side is folded back to the connecting groove 25 to expose the connecting groove 25, as in the above-described replacement work of the rubber grip 5.

Next, if the solvent S is sequentially injected and filled from the inflow device 29 into the connecting groove 25, the solvent S is once held in the connecting groove 25 and then sequentially flows into the axial grooves 21-1 connected thereto. I will do it.
Then, the solvent S flowing down into each axial groove 21-1 accumulates in each of the axial grooves 21-1 while collecting in the connecting groove 33 provided at the end on the grip end 9 side. After the whole axial groove 21-1 is filled with the solvent S over the grooves 25, 33, the injection is stopped, the excess solvent S is discharged from the opening 19, and the solvent grip 5 is put across the entire rubber grip 5 on both sides. The shaft 1 may be pulled out by penetrating the entire surface of the adhesive tape.

Thus, since the rubber grip 5-1 of this embodiment performs injection | pouring and discharge | emission of the solvent S by the opening 19 of the shaft insertion hole 15 at the time of replacement | exchange operation | work, unlike the prior art examples of patent documents 1 and 2, rubber grip 5 As a result, the design can be reused by recycling with improved gripping and durability.
Also, in this embodiment, since the connecting groove 25 connected to the plurality of axial grooves 21 is provided on the inner periphery of the shaft insertion hole 15, the solvent S can be easily injected and filled into the plurality of axial grooves 21 at the time of replacement work. Furthermore, in combination with the fact that the outer peripheral groove 27 is provided so that the grip head 11 side can be easily folded back and the folded state is easily maintained, there is an advantage that the workability is dramatically improved as compared with the prior art. Have.

  In addition, the present embodiment has an advantage that the amount of the solvent S used can be reduced compared to the rubber grip 5 described above, because the solvent S is not discharged from the air vent hole 17 during the replacement work.

1 is an overall configuration diagram of a golf club according to one embodiment of claim 1, claim 3 and claim 4. FIG. FIG. 2 is an enlarged plan view of a rubber grip attached to the golf club of FIG. 1. It is the III-III sectional view taken on the line of FIG. It is sectional drawing of a rubber grip. It is the VV sectional view taken on the line of FIG. It is the VI-VI sectional view taken on the line of FIG. It is the VII-VII sectional view taken on the line of FIG. It is the VIII-VIII sectional view taken on the line of FIG. It is explanatory drawing of the injection method of a solvent. FIG. 5 is a cross-sectional view of a rubber grip attached to a golf club according to an embodiment of claims 2 to 4.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Shaft 3 Head 5, 5-1 Rubber grip 7 Golf club 9 Grip end 11 Grip head 13 Shaft grip part 15 Shaft insertion hole 17 Air vent hole 19 Shaft insertion hole opening 21, 21-1 Axial groove 23 Communication groove 25, 33 articulated groove 27 outer peripheral groove 29 injector S solvent

Claims (4)

A golf club comprising a golf club shaft and a grip fixed to the grip portion of the golf club shaft by an adhesive material,
The grip has a bottomed shaft insertion hole into which the grip portion can be inserted, and an air vent hole at the grip end.
A plurality of axial grooves formed along the grip axis direction are connected to the inner periphery of the shaft insertion hole, with one end side positioned near the opening of the shaft insertion hole, and the axial grooves and the air vent holes. A golf club characterized in that a communication groove is provided. A golf club comprising a golf club shaft and a grip fixed to the grip portion of the golf club shaft by an adhesive material,
The grip is formed with a bottomed shaft insertion hole into which the grip portion can be inserted,
A plurality of axial grooves, one end of which is located in the vicinity of the opening of the shaft insertion hole and the other end of the shaft insertion hole connected to each other via a connection groove formed in the circumferential direction, extend along the grip axis direction. A golf club characterized by being formed.   The connecting groove that is formed in the circumferential direction and connects the axial grooves is provided on one end side of the axial groove located in the vicinity of the opening of the shaft insertion hole. The listed golf club. The golf club according to claim 3, wherein a circumferential groove is provided on an outer periphery of the grip closer to the grip head than the connecting groove.

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