JPH0966124A - Adapter for hosel of golf club - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an adapter which can appropriately and surely join a club shaft to a hosel of a club head without times and labors. SOLUTION: An adapter 10 used for fitting a club shaft 3 to a hosel 2 of a club head 2, has a pipe-like shape having an inner diameter and an outer diameter which correspond to the inner diameter of a hosel hole 2a in the club head 1 and the outer diameter of the front end part 3a of the club shaft 3 which is at least less than the former, respectively, and accordingly, it can be fitted in a gap between the hosel hole 2a and the front end part 3A of the club shaft 3, and an the peripheral surfaces of the pipe-like adapter 10 are coated thereover with an adhesive. The outer and inner diameter parts of the adapter 10 are tapered, that is, the deeper the insertion of the shaft 3, the larger the diameter of the proximal end part of the adapter. A plurality of slits 11 are formed in the adapter 10, longitudinally extending from one end part of the adapter 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adapter used for mounting a club shaft on a hosel of a club head.

[0002]

2. Description of the Related Art Golf club heads, which are roughly classified into woods, irons, and putters, are made of different materials according to their types. For example, in the case of wood, typically Persimmon, carbon, stainless steel,
Titanium, beryllium copper, aluminum or the like is used. In the case of irons and putters, soft iron, stainless steel, titanium, beryllium copper, brass, carbon, or the like is used.

A club shaft is mounted on the hosel of the club head. In the case of a relatively soft club head such as persimmon or carbon, the hosel hole is first formed with a small diameter. Then, the hosel hole can be gradually enlarged by reamer processing or the like while matching the diameter of the tip end portion of the club shaft, and finally the diameters of both can be matched. On the other hand, in the case of a hard metal club head made of stainless steel or the like, it is difficult to expand the hosel hole, so that the general dimensions (φ8.5 mm for wood, For iron φ
A hosel hole of 9.4 mm) is formed.

By the way, in the club shaft, the diameter and the like of the tip portion of the shaft designed to obtain a predetermined performance cannot be changed indiscriminately. In other words, there is a limit to the degree of freedom in designing the shaft. Therefore, for many prefabricated club heads with hosel holes of general dimensions, the hole diameter is set as described above, so it is not easy to apply the optimum club shaft that matches the hosel hole. Can not. In such a case, a club shaft having a shaft tip having a diameter smaller than that of the hosel hole is used and mounted on the club head.

Conventionally, when the club shaft 3 is mounted on the hosel 2 of the club head 1 as shown in FIG. 13, the small-diameter shaft tip portion 3a is inserted into the large-diameter hosel hole 2a. There is a gap between them. Incidentally, the club shaft 3 is usually arranged as shown in FIG.
Bias layer 3b and straight layer 3c made of carbon fiber
It is configured as a hollow shaft having a laminated structure having. Conventionally, when a gap is generated between the hosel hole 2a and the shaft tip portion 3a in this manner, for example, as shown in FIG.
As shown in FIG. 5, a thread (a kite thread, etc.) is attached to the shaft tip 3a
4 was spirally wound and fixed with an adhesive. Further, in this way, the thread 4 is attached to the shaft tip 3a.
In addition to the case of wrapping, the paper, cloth, or a metal piece is wrapped, or means such as dusting with sand is taken.

[0006]

However, in the conventional joining method or structure of the club head 1 and the club shaft 3 as described above, for example, as shown in FIG.
When winding the yarn, the yarn 4 must be wound around the shaft tip portion 3a in a double or triple manner. Then, the adhesive must be sufficiently rubbed between the wound yarns 4 and the work must be performed with great care so that air is not mixed into the gaps. Such work requires a great deal of time and effort and is extremely troublesome.

Further, particularly when the difference between the inner and outer diameters of the hosel hole 2a and the shaft tip portion 3a is large, it becomes extremely difficult to join the club shaft 3 to the hosel 2 in parallel. If this parallelism cannot be sufficiently secured, not only the club face will be open or crossed, but also a proper lie angle cannot be obtained, and there is a problem that the club performance is significantly affected. . Also, when wrapping paper or the like, for example, a slightly thick paper compression fiber system is used.

Adhesive is applied to the hosel hole, a strip of paper is inserted into the hosel hole, and the shaft coated with the adhesive is inserted. However, in this case, when inserting the shaft, there is a risk that the paper inserted into the hosel hole may be pushed downward, and further, the paper itself may peel off, resulting in defective adhesion. SUMMARY OF THE INVENTION In view of such circumstances, an object of the present invention is to provide an adapter that can be properly and accurately joined to a hosel of a club head when the club shaft is mounted without any trouble.

[0009]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies on such problems, and as a result,
When the difference between the inner and outer diameters of the hosel hole and the tip of the shaft is large, it was found that the adapter acts as a spacer by inserting the adapter into the gap between them, and the present invention was completed based on this finding. It is a thing.

That is, the present invention is (1) an adapter for mounting a club shaft on a club head bosel, the adapter being insertable into a gap between a hosel hole of the club head and a shaft tip portion, and the shaft tip portion. And a hosel adapter formed in a pipe shape having an inner diameter and an outer diameter corresponding to the outer diameter of the hosel hole and the inner diameter of the hosel hole.

(2) The hosel adapter is characterized in that the hosel adapter integrally has a socket portion attached to the opening of the hosel hole at one end of the pipe.

Further, (3), the outer diameter and / or the inner diameter is tapered, and the base portion is expanded by inserting the tip end portion of the shaft (1) or (2).
This is the hosel adapter for the golf club head.

Further, (4), a plurality of slits are formed from one end side along the longitudinal direction, (1),
The hosel adapter for the golf club head according to any one of (2) and (3).

Further, (5), any one of the above (1), (2), (3) and (4) in which an annular or spiral ridge or groove is formed along the peripheral surface. It exists in the hosel adapter in the golf club head.

[0015]

According to the present invention, it is particularly effective when a shaft tip having a relatively small diameter is inserted into the hosel hole. That is, by inserting a pipe-shaped adapter having an outer diameter corresponding to the inner and outer diameters of the hosel hole and the tip of the shaft, the gap can be evenly and evenly filled. Then, the tip of the shaft can be securely fixed to the hosel hole by the adhesive applied to the peripheral surface of the adapter.

Further, in particular, by tapering the outer peripheral side or the inner peripheral side of the adapter, when the tip of the shaft is inserted into the adapter, the diameter of the base of the adapter is appropriately expanded. By thus expanding the diameter of the adapter within the hosel hole, the coupling strength of the shaft tip portion with respect to the hosel hole can be increased. In this case, by forming a slit along the longitudinal direction from one end side of the adapter, the diameter of the base portion of the adapter can be increased more easily. Furthermore,
By forming an annular or spiral protrusion or groove along the peripheral surface of the adapter, the effect of retaining the adhesive applied to the peripheral surface of the adapter can be enhanced and the adhesive strength can be effectively increased.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of a hosel adapter for a golf club head according to the present invention will be described below with reference to FIGS. The form will be described. As shown in FIG. 1, the club shaft 3 is attached to the hosel 2 of the club head 1.
The shaft tip 3a having a relatively small diameter is inserted into the large-diameter hosel hole 2a.

In this case, the diameter dimension of the hosel hole 2a may be set to a general dimension of 8.5 mm or 9.4 mm, for example. A gap is formed between the hosel hole 2a and the shaft tip portion 3a, and the adapter 10 is inserted into this gap. The adapter 10 is formed in a pipe shape so as to have an inner diameter and an outer diameter substantially corresponding to the outer diameter of the shaft tip portion 3a and the inner diameter of the hosel hole 2a. Also, as described below,
An adhesive is applied to the peripheral surface of the adapter 10 in order to further secure the fixing.

Here, the material forming the adapter 10 is
Mainly used are fiber-reinforced resins (CFRP, FRP), plastic resins, soft metals, hard rubbers, dampers, Kevlar or ceramics alone or in a composite. Furthermore, any of an organic material, an inorganic material, or a metal may be used. The following are suitable as examples of the specific configuration or structural form of the adapter 10.

(1) The adapter is formed in a pipe shape mainly composed of a fiber reinforced resin layer. In this case, metal fibers or metal foils of boron, titanium, stainless steel, steel or the like are mixed between the layers of the fiber reinforced resin layer, or a reinforcing layer such as a rubber shock absorber, Kevlar, or ceramic is provided as needed. . (2) The adapter is formed of a single material into a pipe shape. In this case, it is formed of a metal such as brass, copper, aluminum or steel, or a resin-based material such as plastic or polycarbonate.

The shape of the adapter 10 may be a straight (parallel) simple pipe shape with both the outer diameter and the inner diameter, but it is preferable here that the outer diameter and / or the inner diameter is tapered. For example, in the size / shape examples shown in FIGS. 3 and 4, it is possible to set A> B and C <D, or to set A = B and C <D. When the taper is applied in this manner, it is preferable that the taper is not an extreme taper but a gentle taper.

As shown in FIGS. 2 to 4, the adapter 10 also has a plurality of slits 11 (four slits in this example) formed in the longitudinal direction from one end thereof. Each slit 11 is extended by an appropriate length from one end side by making a cut to the extent of the entire length of the adapter 10. In addition to the case of this illustrated example, four or more slits 11 or less may be provided. Further slit 1
1 may be formed so as to be inclined in the longitudinal axis direction of the adapter 10 as shown in FIG. 5 (a), or may be formed as curved as shown in FIG. 5 (b).

The adapter 10 of the first embodiment of the present invention configured as described above has a hosel hole 2a as shown in FIG.
Fit in. An adhesive made of epoxy resin or the like is applied to the inner and outer peripheral surfaces of the adapter 10 in order to secure the fixation. As shown in FIG. 6A, the shaft tip portion 3a
When the adapter 10 is inserted into the adapter 10, the adapter 1 has a taper on the outer peripheral side or the inner peripheral side.
The base of No. 0 has an appropriate diameter expansion as shown in FIG.

In this way, the adapter 1 is placed in the hosel hole 2a.
By expanding the diameter of 0, a so-called wedge effect can be obtained, and the coupling strength of the shaft tip portion 3a to the hosel hole 2a can be increased. Further, at that time, since the slit 11 is formed in the adapter 10, the diameter of the base portion of the adapter 10 can be easily expanded. By fittingly inserting the adapter 10 into the gap between the hosel hole 2a and the shaft tip portion 3a, the shaft tip portion 3a can be securely and accurately fixed to the hosel hole 2a.

7 to 9 show an adapter 20 according to the second embodiment of the present invention. Adapter 2 for this example
0 is formed in a pipe shape so as to have an inner diameter and an outer diameter that substantially correspond to the inner diameter of the hosel hole 2a of the club head 1 and the outer diameter of the shaft tip portion 3a. And in particular, FIG.
As shown in FIG. 8 and FIG. 8, a socket 21 that can be attached to the opening of the hosel hole 2a is integrally provided at one end of the adapter 20 having a pipe shape.

The socket portion 21 itself is formed in a truncated cone shape, and naturally the shaft tip portion 3a penetrates. Further, as shown in FIG. 9, the adapter 20 has a plurality of slits 22 extending from one end side in the longitudinal direction.
have. According to the adapter 20, the hosel hole 2a
On the other hand, the shaft tip portion 3a can be securely and accurately fixed. In the second embodiment, particularly, the adapter 20 does not have a simple pipe shape that fills the gap between the hosel hole 2a and the shaft tip portion 3a, but further has a socket portion 21 integrally formed.

By having the socket portion 21,
The effect of protecting the joint between the hosel 2 and the club shaft 3 can be obtained. Here, in each of the above embodiments, as shown in FIGS. 10 and 11, the adapter 10 (or 2
An annular (see FIG. 10) or spiral (see FIG. 11) ridge 12 can be formed along the peripheral surface of (0).
In addition, a groove may be formed instead of the protrusion 12.

In this case, the adapter 10 (or 20) is made of a resin material, and preferably the width of the protrusion 12 is 1 to 1.
The height is set to about 3 mm, the height is set to about 0.3 to 0.7 mm, and the interval is set to about 0.5 to 10 mm. By providing the adapter 10 (or 20) with appropriate irregularities on the peripheral surface in this manner, the adhesive 1 applied to the peripheral surface of the adapter as shown in FIG.
The retention effect for 3 can be enhanced, and the adhesive strength can be effectively increased. Further, since the ridge 12 is appropriately crushed when the shaft tip portion 3a is inserted, the ridge 12 can be easily inserted.

Although the preferred embodiment of the present invention has been described, various modifications can be made without departing from the scope of the present invention. For example, the shape of the socket portion is not limited to the truncated cone shape, and may be any shape as long as the outer periphery of the hosel portion and the outer periphery of the shaft do not form a step. Further, the slit shape can of course be adopted as long as the adapter can be expanded.

[0030]

As described above, according to the present invention,
Since a pipe-shaped adapter with a relatively simple structure is simply inserted into the gap, not only is it easy to fabricate itself, but the mounting work is also easy, and work efficiency is improved. can do. Further, in particular, when there is a difference in inner and outer diameters of the hosel hole and the tip of the shaft, the club shaft can be mounted accurately with no deviation with respect to the hosel, and as a result, excellent club performance can be realized. It will be possible. Furthermore, it acts as a spacer for the gap between the hosel hole and the shaft tip, and the shaft tip does not directly hit the hosel hole, so it exerts a buffering effect against the impact when hitting a golf ball, and it prevents shaft breakage accidents. It can be effectively prevented and is extremely excellent in terms of safety.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view when an adapter is attached according to a first embodiment of the present invention.

FIG. 2 is a perspective view of the adapter according to the first embodiment of the present invention.

FIG. 3 is a front view of the adapter according to the first embodiment of the present invention.

FIG. 4 is a bottom view of the adapter according to the first embodiment of the present invention.

FIG. 5 is a diagram showing a configuration example of each slit of the adapter according to the first embodiment of the present invention.

FIG. 6 is a cross-sectional view explaining the operation of the adapter according to the first embodiment of the present invention.

FIG. 7 is a partial perspective view of the adapter according to the second embodiment of the present invention when it is inserted.

FIG. 8 is a partial cross-sectional view when an adapter is inserted according to the second embodiment of the present invention.

FIG. 9 is a perspective view of an adapter according to a second embodiment of the present invention.

FIG. 10 is a diagram showing a configuration example of a ring-shaped protrusion formed along the peripheral surface of the adapter according to the present invention.

FIG. 11 is a view showing a configuration example of a spiral protrusion formed along the peripheral surface of the adapter according to the present invention.

FIG. 12 is a view showing an operation example of an annular or spiral protrusion according to the present invention.

FIG. 13 is a cross-sectional view of essential parts showing a state when the club shaft is attached to the hosel of the conventional club head.

FIG. 14 is a partial sectional view showing a structural example of a conventional club shaft.

FIG. 15 is a partial cross-sectional view showing a configuration example in which a club shaft is attached to a hosel of a club head using a conventional thread.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Club head 2 ... Hosel 2a ... Hosel hole 3 ... Club shaft 3a ... Shaft tip part 3b ... Bias layer 3c ... Straight layer 10,20 ... Adapter 11,22 ... Slit 12 ... Ridge 21 ... Socket part

Claims (5)

[Claims] 1. An adapter for mounting a club shaft to a hosel of a club head, the adapter being insertable into a gap between a hosel hole of the club head and a tip portion of the shaft, the outer diameter of the shaft tip portion and the hosel hole A hosel adapter formed into a pipe having an inner diameter and an outer diameter corresponding to the inner diameter. 2. The hosel adapter according to claim 1, wherein the hosel adapter integrally has a socket portion that is attached to the opening of the hosel hole at one end side of the pipe shape. 3. An outer diameter and / or an inner diameter is tapered,
The hosel adapter for a golf club head according to claim 1 or 2, wherein a diameter of a base portion is expanded by inserting the tip portion of the shaft. 4. The hosel adapter for a golf club head according to claim 1, wherein a plurality of slits are formed from one end side along the longitudinal direction. 5. An annular or spiral ridge or groove is formed along the circumferential surface.
The hosel adapter for the golf club head according to any one of 2, 3 and 4.