JP2001190713A - Golf club and socket parts - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a golf club which improves the joint strength of a socket with a shaft, the body of which is made of an elastic material. SOLUTION: In the golf club the shaft 12 is inserted into and joined with a head 10 and a cylindrical socket 14 is provided just above the insertion-joint part. The socket body 14H is made of a material as elastic as rubber and a layer of an adhesive material less elastic than the socket body is interposed between the socket body and the shaft.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a golf club and a socket component using a socket having a main body formed of an elastic material having an elasticity similar to that of rubber.

[0002]

2. Description of the Related Art Original golf club sockets have been provided for the purpose of reinforcing damage prevention and improving the appearance due to concentration of stress at the time of hitting a ball at a joint between a shaft and a head. On the other hand, JP-A-10-295856 discloses a golf club in which a rubber socket is mounted to prevent transmission of vibration to a shaft at the time of hitting a ball. It is disclosed that in mounting the socket, raw rubber is heated and pressurized and vulcanized to be integrated with a shaft. Further, Japanese Patent Application Laid-Open No. 5-192424 discloses a golf club in which a metal tube such as aluminum is mounted on a shaft via a rubber-based cushioning material, and is disclosed to be mounted by bonding or welding. .

[0003]

However, in the former vulcanization molding under heating and pressing and the latter welding (considering a technique similar to welding), the socket and the shaft are made of metal or fiber reinforced resin. Cannot be expected so much, and there is a strong possibility that the joint mounting will be disengaged by repeated use. However, sufficient bonding strength cannot always be obtained by the latter bonding. In the case of bonding, the adhesive layer is hardened, and the hardened adhesive layer is easily peeled off due to the impact, and also the effect of absorbing vibration is reduced. Therefore, the present invention
Provided is a golf club in which the strength of joining a socket whose main body is made of an elastic material to a shaft is improved. In addition, the present invention provides a golf club in which the effect of absorbing the vibration of the shaft, which has received the vibration of the head at the time of hitting the ball, by the socket as much as possible.

[0004]

SUMMARY OF THE INVENTION In view of the above object, according to the present invention, there is provided a golf club according to claim 1, wherein the shaft is inserted and connected to the head, and a cylindrical socket is disposed immediately above the insertion connection. The main body of the socket is formed of an elastic material having elasticity similar to that of rubber, and a layer of an adhesive material having a lower elasticity than the elasticity of the main body is provided between the main body and the shaft. To provide a golf club. The head is used to include the hosel, if it has one, and the lower end of the socket may be in contact with the head directly above the insertion connection, or may be somewhat distant. The distance away is at most a few centimeters. Furthermore, a part is inserted in the head,
The rest may be at the top of the insert. Further, the socket in the present application does not have to be in contact with the head as described above, and is used in a wide sense including a form different from the socket in the original narrow sense. The layer of the adhesive may be provided over the entire length of the main body, or may be provided on a part of the longitudinal direction. Since the cylindrical socket is arranged immediately above the insertion part between the head and the shaft, the insertion connection part between the head and the shaft does not go directly into the eyes when the golfer holds the ball when hitting, It can be seen without any change and can be shot without feeling uncomfortable. In addition, since the socket body is joined to the shaft by a layer of a low-elasticity adhesive material, the joint does not crack or the like even after repeated hits, and is hardly peeled off.

According to a second aspect of the present invention, a recess is formed outside the socket body except at an upper end and a lower end, and the tube is disposed in the recess. 2. The golf club according to claim 1, wherein the outer surface of the tube made of a highly elastic material is substantially flush with or lower than the upper and lower surfaces of the socket body. In addition to the function and effect of claim 1, the pipe body having a higher elasticity than the main body is buried in the concave portion of the main body almost flush with the main body.
When the golf tool is carried, another golf club is prevented from being damaged by the tube at the outer peripheral portion of the socket. Further, on the outside of the shaft, a layer of an adhesive material having lower elasticity than the main body, on the outside thereof, a main body layer of an elastic material having elasticity similar to that of rubber, and further on the outside, a tube of a material having higher elasticity than the elasticity of the main body Because they are arranged in the order of layers,
Shaft vibration can be efficiently absorbed.

According to a third aspect of the present invention, there is provided the golf club according to the second aspect, wherein the adhesive layer is a double-sided tape layer, the socket body is made of rubber, and the tube is made of metal. In addition to the functions and effects of claim 2, double-sided tape, rubber,
Metal is a member that is very easily available, and the socket portion can be constituted by these members, thereby facilitating manufacture. In addition, the outer metal is considerably harder than rubber, and the difference in hardness between the two layers is large, so that vibration can be efficiently absorbed.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in more detail with reference to embodiments shown in the accompanying drawings. FIG. 1 is a perspective view of the vicinity of a head of a golf club according to the present invention, and FIG.
FIG. 3 is an enlarged vertical sectional view of a main part thereof. Further, FIG. 3 shows C in FIG.
It is an enlarged view of a part. FIG. 1 shows a so-called wood type head, but the material may be wood, a metal such as titanium, or a golf club having an iron type head. The head 10 is provided with a hole 10H into which the tip of the shaft 12 is inserted and fixed by bonding or the like. The shaft 12 may be made of metal or a fiber reinforced resin obtained by impregnating a reinforcing fiber such as a carbon fiber with a synthetic resin such as an epoxy resin.

In the case of a head having a hosel, the hole 10H is formed only on the hosel or over the hosel and the main body of the head. In this embodiment, the head does not have a hosel. By adopting such a configuration, the shaft 12 near the head can be easily bent because of the absence of the hosel. Even for clubs that are inherently difficult to hit (like small clubs), they can easily hit.

In the case of a club in which the shaft is easily deflected as in this embodiment, it is meaningless to improve the rigidity of the upper portion of the joining area by attaching a hard socket as in the prior art, and it is not necessary to mount such a socket. Conceivable. However, without the socket, most golfers who are accustomed to golf clubs with a socket can easily see the joint between the head and the shaft and feel uncomfortable when holding the ball when hitting. Therefore, it is preferable that the socket 14 having a conventional outer shape is provided immediately above the insertion coupling portion. Further, in the mounting portion, the shaft 1
A socket having a low bending rigidity is preferable so as not to hinder the bending of the socket 2. It is also desirable to prevent the vibration at the time of impact from being transmitted to the grip at hand. Further, as a matter of course, such a problem that the mounted socket comes off must be prevented.

In view of the above, here, the socket component 14 'having the socket body 14H made of rubber is mounted at a distance (for example, 5 mm) within a few centimeters from the upper surface of the head 10. The socket main body is a cylindrical body, and has a hole 14HB into which a shaft can be inserted, penetrating in the longitudinal direction of the cylindrical main body. A recess 1 on the outer periphery of the main body
4HA is provided. The concave portion is formed over the entire circumference, and no concave portion is formed on the upper end portion 14U and the lower end portion 14L in the longitudinal direction of the main body. A tube 14T made of a material having a higher elasticity than the elasticity of the main body is fitted into and attached to the concave portion. In this embodiment, the outer periphery of the tube is substantially flush with the outer periphery of the upper and lower ends of the main body. A single groove 14K as a design is formed on the entire outer periphery of the lower end portion 14L.

[0011] To join this part to the shaft,
The double-sided tape 14N is attached to a predetermined position of the shaft for the purpose of absorbing the vibration described above. Thereafter, a solvent such as a solvent or alcohol is applied to the surface of the double-sided tape, and the double-sided tape is inserted into the through hole of the socket body 14H so that the double-sided tape portion can be smoothly inserted. Thereafter, if the solvent evaporates, the socket body is joined to the shaft by the adhesive force of the double-sided tape. Layer 14 of this double-sided tape
N has a central support film body 14NC, an inner adhesive layer 14NA, and an outer adhesive layer 14NB.
4N as a whole is a layer of an adhesive material having lower elasticity than the socket body 14H.

Since the double-sided tape 14N as a joining member does not harden like an adhesive, it easily follows the deflection of the shaft at the time of hitting, and hardly causes peeling or the like even by vibration at the time of hitting, and has high joining strength. . As a result of the above-described configuration, the lowest elastic layer 14N is provided outside the shaft 12, the intermediate elastic body layer 14H is provided outside the shaft 12, and the most elastic (hard) tube layer 14T is provided outside the shaft. The vibration generated in the head 10 at the time of impact is transmitted to the shaft, and the three layers (or 4
The vibration can be effectively absorbed by the presence of the socket 14 having 14N, 14H, and 14T. On the wall surface of the through hole 14HB of the main body 14H,
Although a concave portion for receiving the low elastic layer 14N may be formed in advance, the concave portion may not be provided, and the low elastic layer may be directly bonded on the wall surface of the through hole.

The above tube 14T is prevented from falling off by the upper and lower ends 14U, 14L of the socket body and is substantially flush with the above-mentioned one. Is prevented from being damaged.
The tube 14T only needs to be higher in elasticity than the socket body 14H, and may be made of such an elastic synthetic resin or metal.
In particular, in the case of metal, it is preferable to use a metal having a specific gravity of about 5 or less because the weight of the golf club is not greatly increased. For example, titanium, titanium alloy, aluminum alloy,
Magnesium alloy and the like.

The socket body 10H has an elastic modulus of 10 ⁵ to
Rubber and synthetic resin (including foamable resin) of about 10 ⁷ N / m ² are preferable. In terms of hardness, the hardness according to JIS K6253 test (hardness measured by a type A durometer) is A30 or more, preferably A90 or less, and A
About 70 is more preferable. Further, if the material is formed of a material having a specific gravity of less than 1, preferably less than 0.9, the club can be made relatively light, and can be easily formed without deteriorating the weight balance of the club. Furthermore,
If the main body material has excellent properties of weather resistance, heat resistance, and ozone resistance, the deterioration of the club can be prevented. Can be prevented. In particular, it is preferable to use an ethylene propylene terpolymer or an ethylene propylene rubber.

The low elastic pressure-sensitive adhesive layer 14N has the same J
It has a hardness of less than A30 as measured by IS and a thickness of 0.0
The thickness is preferably 1 to 1.0 mm, and other than the double-sided tape, there is a form in which a layer of the adhesive itself such as acrylic or silicon is used. Of course, such an adhesive such as acrylic or silicone can be used as an adhesive applied to the support film 14NC of the double-sided tape, and such a double-sided tape is used as the low elastic layer as described above. In the above embodiment, the socket 1
Although 4 is separated upward from the head 10, the lower end of the socket may be in contact with the head, or a part may be buried in the head. Unlike the above embodiment in which a radial gap is provided between the head and the shaft insertion portion, a golf club in which the entire insertion portion of the shaft is in close contact may be used.

The socket body 14H can be sold as a single item, and a golf club maker provides a tube 14T on the outside,
And it can be integrated with the shaft through the adhesive layer 14N inside. In addition, the socket part 14 'in which the tube 14T is disposed outside the socket body 14H can be sold as a single item, and can be integrated with the shaft through the adhesive layer 14N inside the golf club maker. Note that an adhesive layer such as a double-sided tape 14N may be provided in advance on the wall surface of the through hole of the socket body. In this case, the surface of the adhesive layer is covered with an appropriate sheet material, At the time of mounting, remove the sheet material and apply the solvent, and mount it on the shaft.

[0017]

As is apparent from the above description, according to the present invention, it is possible to provide a golf club in which the joining strength of the soft socket of the main body to the shaft is improved. In addition to this, it is possible to provide a golf club in which the effect of absorbing the vibration of the shaft received by the vibration of the head at the time of hitting the ball by the socket is made as large as possible.

[Brief description of the drawings]

FIG. 1 is a perspective view of the vicinity of a head of a golf club according to the present invention.

FIG. 2 is an enlarged vertical sectional view of a main part of FIG.

FIG. 3 is an enlarged view of a portion C in FIG. 2;

FIG. 4 is a longitudinal sectional view of a socket component.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Head 12 Shaft 14 Socket 14N Adhesive layer 14H Socket body 14T Cylindrical body

Claims (4)

[Claims] 1. A shaft is inserted and connected to a head,
A golf club in which a cylindrical socket is disposed immediately above the insertion coupling portion, wherein a main body of the socket is formed of an elastic material having elasticity similar to that of rubber, and the main body is provided between the main body and a shaft. A golf club comprising an adhesive layer having a lower elasticity than the elasticity of the golf club. 2. A recess is formed outside the socket body except at an upper end and a lower end, and a tube made of a material having a higher elasticity than the elasticity of the socket body is provided in the recess. 2. The golf club according to claim 1, wherein the outer surface of the tube is substantially flush with or lower than the upper and lower surfaces of the socket body. 3. The golf club according to claim 2, wherein the adhesive layer is a double-sided tape layer, the socket body is made of rubber, and the tube is made of metal. 4. A golf club comprising a cylindrical socket part having a hole formed therein which can be inserted into a shaft of a golf club, and having a body made of an elastic material having elasticity similar to that of rubber. Club socket parts.