JPH11313906A - Method of fixing face member of golf club head - Google Patents

Abstract

(57) [Problem] To prevent welding of a head body and a face member or breakage of a bonded portion. SOLUTION: A golf club head comprising a metallic head member 1 fixed to a peripheral portion of an opening of a metallic head body 1 made of a crown, a back side, a sole and the like and opened on the face surface side and having a hollow shell body side. This is a fixing method of the face member 6, wherein each of the plate members 10A and 10B of the laminated portion 10 in which a portion including the sweet area of the face member 6 is formed of at least two layers of plate members 10A and 10B is connected to each of the entire peripheral edges. The thickness of the peripheral portion of the opening of the head body 1 and the thickness of the peripheral portion of the face member 6 are made substantially the same, and the end surfaces of the thickness portions of both peripheral portions are joined.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal golf club head having a hollow shell formed of a crown, a back side, a sole, and the like and having an opening on the face side. The present invention relates to a method for fixing a part.

[0002]

2. Description of the Related Art In order to increase the flight distance of a wood club, a face structure in which a plurality of plate members are laminated has been proposed (Japanese Patent Laid-Open No. 9-239076). The spring constant of the face member is reduced to increase the restoring force of the deflection of the face when the face collides with the ball, thereby increasing the initial speed of the hit ball and increasing the flight distance. Also, due to the displacement between the laminated plates, the spring constant becomes lower than that of a single plate having the same thickness as the total plate thickness, so that the face thickness is not excessively reduced and the impact resistance of the face member is not reduced. Have been.

[0003]

As shown in FIG. 4, in the club head of the multi-layered face member, the multi-layered structure is formed at the peripheral edge of the opening on the face side of the bowl-shaped head body 100. Of the face member 101 is simply welded or bonded (welded portion 102). For this reason, when the impact by the hit ball is repeatedly received, the welded portion 102
However, there was a problem that it was easily damaged. In particular, in the head of the wood club targeted by the present invention, the face member is a laminated plate, the spring constant is small, and the deflection at the time of impact is larger than that of the conventional single-plate structure face. Damage comes close up.

In view of such a situation, an object of the present invention is to weld a head body and a face member based on the impact of a golf ball in a wood club having a face member including a laminated portion. Another object of the present invention is to provide a method for fixing a face member of a golf club head, which can prevent the bonded portion from being damaged.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention relates to a hollow metal shell having a crown, a back side, a sole, and the like, which is opened on the face side. A method for fixing a face member of a golf club head, wherein a peripheral portion of a metal face member is fixed, wherein each plate member of a laminated portion in which a portion including a sweet area of the face member is formed of at least two or more layers of plate members. Are joined to each other at a part of the entire peripheral edge of the head body, the thickness of the opening peripheral portion of the head body and the thickness of the peripheral edge portion of the face member are made substantially the same, and the end surfaces of the thickness portions of both peripheral edges are joined to each other. Things.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings.

[0007] In the embodiment shown in FIG.
Is composed of a crown 2, a sole 3, a side back 4, and the like, and is integrally formed of a metal material. This head body 1
Is open at the face side, and an end face 7 at the peripheral edge of the face member 6 is welded to the end face 5 at the peripheral edge of the opening (see FIG. 3). Reference numeral 8 denotes a hosel for attaching a shaft (not shown) formed integrally with the head main body 1. The face member 6 has a laminated portion 10 in which a portion including a sweet area (a region of a hit point where 95% or more of the maximum flight distance can be obtained) is formed of at least two layers of plate materials 10A and 10B. In this embodiment, the plate material 10A on the face side is integrally formed with the face member 6 other than the laminated portion 10, and the plate material 10B is fitted in a rectangular groove on the back side of the plate material 10A. The plate members 10A and 10B are welded only at a part of the entire peripheral edge, in this example, only at the peripheral edge on the crown 2 side and the sole 3 side, and the peripheral edges on the toe 11 side and the heel 12 side are free. This welded joint is indicated by reference numeral 9 in FIG.
The joining portion 9 can be formed by screwing or bonding instead of welding.

[0008] thickness of the strong shock face member 6 (the thickness of the wall thickness and the end 7 toward the stacked portion 10 is indicated by t ₀₎ is thicker, the crown 2, backside 4 and side wall of the sole 3 The thickness has been reduced. As a result, in the head provided with the face member 6 including the laminated portion 10, if a simple fixing method of the face member 101 and the head main body 100 as shown in FIG.
In step 2, a step occurs due to a difference in wall thickness between the face member 101 and the head body 100, and stress concentrates on the welded or bonded portion 102, and this portion is liable to be damaged by repeated impacts of the ball. On the other hand, according to the method of the present invention, as shown in FIG. 3, even when the thickness (t) of the head body 1 is smaller than the total thickness (t ₀ ) of the face member 6, The thickness (t ₁ ) of the peripheral edge of the opening is substantially the same as the thickness (t ₀ ) of the peripheral edge of the face member 6, so that stress does not concentrate on the welded or bonded portion 13 and the bonding area is increased. Is increased, and a fixing method with excellent impact resistance is achieved.

As shown in FIG. 2, the laminated portion 10 is 5.3 mm from the top and bottom of the face surface, and is 24.2 mm from the left and right sides.
It is provided in a rectangular shape of 38 mm × 37 mm at a position of 3 mm. The plate members 10A and 10B have the same thickness.

In FIG. 3, when the joint 13 is a weld,
A weld bulge 13 'is formed, which is removed by buffing and finished to be flush with the surface of the sole 3. End face 5 of peripheral edge of opening on the face side of head body 1
Although is welded on the end surface 7 and the bonding portion 13 of the peripheral portion of the face member 6, the thickness t ₁ of this part is not less than 2 mm, extends backward by length a fraction, it is the thickness of the subsequent sole 3 there as about nearly half of the wall thickness t _1. The length a is 3 to 5
mm. Further, in this embodiment, the peripheral portion of the face member 6 is bent rearward of the face surface to form the bent portion 6.
A is formed. A groove (indicated by a dashed line in FIG. 3) extending along the periphery of the face member is provided between the bent portion 6A and the end face 7 of the periphery of the face member 6 so as to absorb the impact on the face surface. You may do it. Also, the head body 1
It is preferable to gradually reduce the thickness of the portion from the region of the length a on the periphery of the opening to the thin portion (thickness t) of the head body 1 to avoid stress concentration. In addition, welding of the joint 13 between the face member 6 and the head main body 1 is performed from outside the head.

[0011]

As described above, according to the present invention, a portion of the face member including the sweet area is formed of at least two or more layers of plate materials, and each of the plate members is part of the entire peripheral edge thereof. The thickness of the peripheral portion of the opening of the head body and the thickness of the peripheral portion of the face member were made substantially the same, and the end faces of the thickness portions of both peripheral portions were joined to each other. Stress concentration does not occur, and the joining area increases, resulting in excellent impact resistance. Also,
When the end of the peripheral edge of the face member is bent rearward of the face surface and abuts against the peripheral edge of the opening of the head body, the stress of the joint generated by hitting the ball is reduced. Furthermore, the joining portion is reinforced by making the thickness a (t ₁ = t ₀ ) substantially equal to the thickness of the face member in a region where the length a from the end face of the opening peripheral portion of the head main body extends to 3 mm or more. The stress in the leverage is further reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a preferred embodiment of the present invention.

FIG. 2 is a front view.

FIG. 3 is an enlarged sectional view of a joint.

FIG. 4 is a sectional view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Head main body 5, 7 End surface 6 Face member 6A Bending part 9 Welding part 10 Laminated part 10A, 10B Plate material 13 Joining part

Claims (3)

[Claims] 1. A golf club head face comprising a crown, a back side, a sole, and the like, and a metal shell member having a hollow shell body, which is open at the face side, and a metal face member fixed to a peripheral edge of an opening. A member fixing method, comprising joining a plurality of plate members of a laminated portion in which a portion including a sweet area of a face member is formed of at least two or more layers of plate members to each other at a part of their respective peripheral edges, A method of fixing a face member to a golf club head, wherein the thickness of the peripheral portion and the thickness of the peripheral portion of the face member are made substantially the same, and the end faces of the thickness portions of both peripheral portions are joined to each other. 2. The peripheral portion of the face member is bent rearward of the face surface, and the bent end surface and the end surface of the opening peripheral portion of the head body are abutted and joined. A method for fixing a face member of a golf club head. 3. The golf club head face member fixing method according to claim 2, wherein a length from an end surface of an opening peripheral portion of the head main body is 3 mm or more.