JPH1028748A - Wood golf club - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve joining work of a head body comprising a plurality of shell parts and a joint strength thereof. SOLUTION: A head body 1 is joined and formed by various shell parts which are divided in three ... a face surface side shell part 11, a crown surface side shell part 12 and a sole surface side shell part 14 containing a surrounding side side shell part 13. An opening part 3 is formed at a heel side end part 2 of the head body 1 by mutually joining heel side end parts 11a, 12a and 14a of the respective shell parts 11, 12 and 14. A hosel member 4 is joined at the opening part 3 while the heel side end parts 11a, 12a and 14a of the respective shell parts 11, 12 and 14 are joined on the hosel member 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a golf wood club having a hollow metal outer shell structure in which a head body is formed of a plurality of shells, and more particularly to welding and diffusion of each shell forming the head body. A joining operation such as joining or brazing and an improvement in the joining strength thereof are achieved.

[0002]

2. Description of the Related Art Conventionally, in a golf wood club head having a hollow metal shell structure of this kind (hereinafter referred to as a metal head), for example, FIGS.
As shown in FIG. 6, the head main body A is formed of a plurality of parts such as a sole surface side shell a4 including a face side shell a1, a crown surface side shell a2 and a peripheral side shell a3 by superplastic working or press working. Of the crown surface side shell portion a2 and the sole surface side shell portion a4, and the heel side ends b2, b4 of the crown side shell portion a2 and the sole surface side shell portion a4. Is formed in a semicircular arc shape, and a circular mouth-like opening c that opens upward is formed at the heel side end of the head body A together with the welding of the shells a2 and a4. There is a configuration in which a hosel member B is separately butted and joined in a completely exposed state, and a shaft member C is inserted and held in the hosel member B.

Conventionally, as shown in FIGS. 17 and 18, the heel-side ends b2 and b4 of the crown-side shell portion a2 and the sole-side shell portion a4 of the head body A, particularly the crown-side shell portion a2 Heel-side end b2 is bent substantially at right angles to stand up to integrally form hosel portions B1 and B2 having a semicircular cross-section, and a shaft is formed in an opening c formed by these hosel portions B1 and B2. While inserting the pipe member D into which the member C is inserted and held, and welding and fixing the inserted end of the pipe member D to the inner bottom surface of the sole surface side shell portion a4,
Heel end b of crown side shell part a2 and sole side shell part a4 forming hosel parts B1 and B2 on the surface
2 and b4 are directly joined.

[0004]

However, in the metal head having the conventional structure as described above, the entire hosel member B is externally attached to the heel side end of the head body A as shown in FIGS. When welding is performed in a state where the hosel member B is completely exposed, since the setting angle of the hosel member B with respect to the head body A, that is, the setting of the lie-loft angle is performed at the time of joining the hosel member B, the joining operation is troublesome, The lie-loft angle also has a large variation, so that it is necessary to adjust the lie-loft angle after joining, and this adjustment requires not only a great amount of time but also poor joint strength.

Further, a crown side shell a2 integrally forming hosel portions B1 and B2 as shown in FIGS.
And the heel side ends b2 and b4 of the sole surface side shell a4 are directly joined to the surface of the pipe member D at right angles, so that not only the welding operation is difficult, but also the shaft member C or the pipe. Since the welding length of the member D in the circumferential direction is short, the joining strength between the members D is inferior.

In addition, after welding, the thickness of the crown surface side shell portion a2 of the head main body A is particularly thinner than the other shell portions a1 and a4, so that it is generated at the welded portion with the shaft member C or the pipe member D. It is difficult to finish the raised surface by grinding or polishing or the like, and it is easy to over-grind or over-polish the crown side shell part a2, thereby leading to poor molding and reduced head performance.

Further, an opening c formed at the heel end of the head body A is a heel end b having a semicircular cross section of the crown side shell a2 and the sole side shell a4.
2 and b4, and these heel side ends b2 and b4 are connected to the shaft member C or the pipe member D.
Since the heel side end b1 of the face side shell a1 is not directly joined to the shaft member C or the pipe member D, it is formed by directly joining to the head member. The joining strength of the main body A is poor.

Further, the hosel portions b2 and b4 of the crown surface side shell portion a2 and the sole surface side shell portion a4 are extended upward and bent into a semicircular cross section so that the hosel portions B1 and B2 are integrated. In the case of forming, since the shell material is made of a rigid material, processing is particularly difficult in cold working, and even in the case of hot working, the scale of the processing equipment is large and the processing time is only long. In addition, processing is difficult because it is performed in a high-temperature atmosphere.

In addition, when the heel-side ends b2 and b4 of the crown-side shell portion a2 and the sole-surface side shell portion a4 are greatly extended and raised, the weight of the raised portion becomes a dead load. In addition, the sweet spot deviates from the center of the face of the head main body A to the heel side, and tends to adversely affect the directionality of the ball when hitting the ball.

SUMMARY OF THE INVENTION An object of the present invention is to provide a golf wood club head capable of improving the joining operation of a head body composed of a plurality of shell portions and the joining strength thereof.

[0011]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a shell of a sole surface side shell including a face side shell, a crown side shell, and a peripheral side shell. Body having a hollow metal outer shell structure in which an opening is formed by joining the heel-side ends of the shells to each other, and a hosel joined to the opening of the head body And a heel-side end of each of the shells is joined to the hosel member.

In this case, a protrusion is formed at an intermediate portion in the longitudinal direction of the hosel member, and the heel side end of each shell of the head body is joined to the protrusion. is there.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings shown in FIGS.
As shown in FIGS. 1 and 2, reference numeral 1 denotes a golf wood club head body according to the present invention.

The head body 1 is formed by superplastic working of a superplastic material such as a superplastic Ti alloy or press working of a rolled metal plate to form a face side shell 11 and a crown surface. A hollow outer shell structure that is divided into three shells, each of a sole shell 14 including a side shell 12 and a peripheral shell 13, and these shells 11, 12, and 14 are assembled and joined to each other. It has the form of

As shown in FIGS. 3 and 4, the heel-side ends 11a, 11a of the shells 11, 12, and 14 are provided at the heel-side end 2 serving as a shaft mounting base of the head body 1. An opening 3 joined and formed by three pieces 12a and 14a is opened, and a hosel member 4 into which a shaft member (not shown) is inserted and held is inserted and joined to the opening 3 separately.

The hosel member 4 is connected to the head main body 1.
And a rod-shaped body 5 of a metal material which can be welded, and an insertion direction X of the rod-shaped body 5.
The heel side ends 11a, 1 of the shells 11, 12, 14 forming the opening 3
A projecting portion 6 to which 2a and 14a are joined is integrally formed by projecting stepwise, and a lower end 5a having a small diameter extending downward is provided at a predetermined position on an inner bottom surface 14b of the sole surface side shell portion 14. And is fixed by positioning and welding.

The protrusion 6 formed on the hosel member 4
Is formed in such a manner that the plane form is an arc-shaped form and is projected so as to have a portion gradually increasing downward in the longitudinal direction so that the peripheral edge 6a is separated L from the surface of the rod-shaped body 5. The head body 1
The heel side end portion 12a of the crown side shell portion 12 has an arc-shaped notch 1 corresponding to the shape of the protrusion 6.
5 is formed, and the peripheral edge 15a of the notch 15 and the peripheral edge 6a of the protrusion 6 are joined to each other.

In the figure, reference numeral 7 denotes a shaft insertion hole for inserting and holding a shaft member (not shown) provided at the upper end portion 5b of the rod 5 forming the hosel member 4.

Next, the manufacturing process of the above-mentioned head body 1 will be described with reference to the drawings shown in FIGS.
A face side shell 11 shown in FIG. 6, a crown side shell 12 shown in FIG. 6, and a sole side shell 14 including a peripheral side shell 13 shown in FIG. While forming by superplastic working of a superplastic material or press working of a rolled metal plate, FIG.
Are formed by lathing or the like.

Then, as shown in FIG. 9, the lower end portion 5a of the rod 5 forming the hosel member 4 at a predetermined position on the inner bottom surface 14b of the sole surface side shell portion 14 while adjusting the lie / loft angle. At the same time, the heel-side end 14 of the sole surface side shell 14 is
After welding is performed by welding w or the like, as shown in FIG. 10, a notch 15 formed in the heel-side end 12 a of the crown-side shell 12 is formed on the peripheral edge 6 a of the protrusion 6 of the hosel member 4. And the sole-side shell 14 including the crown-side shell 12 and the peripheral-side shell 13 by welding w or the like.

Further, as shown in FIG. 11, the heel side end 11a of the face side shell 11 is joined to the protrusion 6 of the hosel member 4 by welding w or the like, and then the face side shell 1 is welded.
1 is joined to the sole surface side shell portion 14 including the crown surface side shell portion 12 and the peripheral side surface side shell portion 13 by welding w or the like, and the raised surface generated at the welded portion w is finished by grinding or polishing. As a result, the head body 1 as shown in FIG.
Is manufactured.

Further, the inner bottom surface 1 of the sole surface side shell portion 14 is formed.
At a predetermined position of 4b, a hole 16 serving as a positioning portion is provided as shown in FIG. 12, and as shown in FIG. 13, the rod-shaped body 5 forming the hosel member 4 in the hole 16 is provided. By inserting the lower end portion 5a of the rod-shaped body 5, the inner bottom surface 14 of the sole surface side shell portion 14 of the lower end portion 5a of the rod-shaped body 5 is formed.
The lower end 5a of the rod 5 protruding outside the sole surface side shell 14 after fixing is cut off by polishing or the like as shown in FIG. It has been removed.

Although the hole 16 has been described as an example of the positioning portion for regulating the joining position of the lower end 5a of the rod 5 forming the hosel member 4, the present invention is not limited to this. The lower end 5a of the rod-shaped body 5 may be in the form of a concave portion or a convex portion such that the lower end portion 5a abuts and the position is regulated.

That is, according to the present invention, the hosel member 4 inserted and joined to the opening 3 formed in the heel side end 2 of the head main body 1 by employing the above-described structure.
A protrusion 6 is formed at an intermediate portion in the longitudinal direction along the insertion direction X of the head body 1, and the heel-side end 12 of the crown surface side shell 12 of the head main body 1 is made to correspond to the form of protrusion of the protrusion 6.
a, and a peripheral edge 15a of the notch 15 and a peripheral edge 6a of the protruding portion 6 of the hosel member 4 are joined to each other. The welding length of the shell portion 12 to the heel side end portion 12a is longer than before, so that the joining strength between them can be improved, and the surfaces of those joining portions become smooth and almost continuous flat surfaces. Because of the joining, finish processing such as grinding or polishing of the surface of the bulge generated at the welded portion can be easily performed.

In addition, since the peripheral edge 6a of the projection 6 of the hosel member 4 is joined to the peripheral edge 15a of the notch 15 formed at the heel side end 12a of the crown side shell 12, As before, sufficient joining strength can be obtained without having to extend the heel side end portion 12a of the crown surface side shell portion 12 greatly upward to thereby raise the heel side end portion 12a, whereby the sweet spot is shifted from the face center of the head main body to the heel side. It does not shift and does not adversely affect the directionality of the ball when hit.

The protruding portion 6 of the hosel member 4 has a heel side end portion 1 of a sole surface side shell portion 14 including a face side shell portion 11, a crown side shell portion 12, and a peripheral side side shell portion 13.
Since each of 1a, 12a, and 14a is joined,
The assembling and joining work of each shell can be easily performed, and the joining strength of the entire head can be improved.

Furthermore, the lower end 5a of the rod 5 forming the hosel member 4 is joined and fixed to a positioning portion 16 provided on the inner bottom surface 14b of the sole surface side shell 14, and the upper end 5a is fixed.
Since the b side is joined to the opening 3 formed on the heel side end 2 side of the head body 1, the hosel member 4 can be accurately positioned in a short time, and the lie-loft angle after the joining is achieved. The dimensional accuracy is high, and the adjustment can be performed easily.

When the head body 1 is manufactured, each of the shells 11, 1 on the projection 6 of the hosel member 4 is formed.
The joining order of the joints 2 and 14 is not limited to the embodiment shown in FIGS. 9 to 11. For example, the protrusion 6 of the hosel member 4 is attached to the heel-side end 12 a of the crown-side shell 12.
After that, the selection is arbitrary, such as joining the heel side end 14a of the sole surface side shell portion 14 including the peripheral side surface side shell portion 13.

Further, the projecting portion 6 formed at the intermediate portion in the longitudinal direction of the rod 5 as the hosel member 4 is gradually increased downward from the upper end 5b of the rod 5 so that the protrusion 6 around the central axis of the rod 5 is formed. Although it has an arc-shaped planar shape having the same diameter over the entire circumference, the heel-side end 1 of the crown-side shell 12 is formed.
The heel-side end portion 11a of the face-side shell portion 11 and the sole-side side shell portion 14 is made to open in a fan shape in one direction toward the 2a side, and the protrusion dimension corresponding to the crown-side shell portion 12 side is increased. , 14a side, the face side shell 1
1 and the heel-side ends 11a, 14 of the sole-side shell 14
It may be a flat plane shape that is almost the same as the thickness of a.

[0030]

As is apparent from the above description, according to the present invention, an opening is formed at the heel side end of the head body composed of a plurality of shells by joining the heel side ends of the shells. Then, all pieces of the heel side end of each shell are joined to the hosel member joined to the opening, respectively, so that assembly and joining work of each shell can be easily performed. Thus, the bonding strength of the entire head can be improved.

Further, a projection is formed at a longitudinally intermediate portion of the hosel member, and a heel side end of each shell, particularly a heel side end of the crown side shell, is formed on a peripheral edge of the projection. , The welding length of the heel side end of the crown side shell portion can be made longer than before, thereby improving the joining strength of each other. Since the joints can be joined so that the surfaces of the joints are smoothly continuous and substantially flat, it is possible to easily perform finishing such as grinding or polishing of the surfacing surface generated in the welded portion.

Further, the peripheral edge of the notch formed at the heel side end of the crown side shell is joined to the peripheral edge of the projecting portion of the hosel member, so that the crown side shell as before is joined. It is not necessary to extend the heel side end of the head greatly upward, and it is possible to obtain sufficient bonding strength. Therefore, the sweet spot does not shift from the center of the face of the head body to the heel side. It does not adversely affect the direction of the ball.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a head in a golf wood club according to the present invention.

FIG. 2 is a sectional view of the same head.

FIG. 3 is an enlarged sectional view of a main part of the same head.

FIG. 4 is an enlarged plan view of a main part of the same head.

FIG. 5 is an explanatory view of a shell part on the face side in the same manner.

FIG. 6 is an explanatory view of a crown side shell part in the same manner.

FIG. 7 is an explanatory view of a sole surface side shell part.

FIG. 8 is an explanatory view of the hosel member.

FIG. 9 is an explanatory view showing a state in which a sole surface side shell portion is similarly joined to a protrusion of a hosel member.

FIG. 10 is an explanatory view showing a state in which a crown-side shell portion is joined to a protruding portion and a sole-side shell portion of the hosel member.

FIG. 11 is an explanatory view showing a joint state of the face side shell to the protruding part of the hosel member, the sole side shell and the crown side shell.

FIG. 12 is an explanatory view showing a state in which positioning of the hosel member on the sole surface side shell portion of the head body is similarly restricted.

FIG. 13 is an enlarged sectional view of a main part showing a positioning restriction state of the hosel member.

FIG. 14 is an enlarged cross-sectional view of a main part showing a state where the hosel member is similarly positioned for positioning.

FIG. 15 is an explanatory view showing a head in a conventional golf wood club.

FIG. 16 is an exploded perspective view showing an assembled state of the head shell.

FIG. 17 is an explanatory view showing another example of a head of a conventional golf wood club in a partially cutaway cross section.

FIG. 18 is an exploded perspective view showing an assembled state of the head shell.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Head body, 2 ... Heel side end part, 3 ... Opening part, 4 ... Hosel member, 5 ... Bar-shaped body, 6 ... Projection part, 6a ... Peripheral end Edge 7 Shaft insertion hole 11 Face-side shell 11a Heel-side end 12 Crown-side shell 12a Heel-side end 13 ······························································· Welding X, the longitudinal direction of the hosel member.

Claims (2)

[Claims] 1. A heel-side end of each of the shells, which is joined at each of the sole-side shells including a face-side shell, a crown-side shell, and a peripheral-side shell, and which has a heel-side end. A head body having a hollow metal outer shell structure in which an opening is formed by joining the head body, and a hosel member joined to the opening of the head body, and the hosel member has a heel side of each of the shells. A wood club for golf, wherein the ends are joined. 2. The head hosel member according to claim 1, wherein a projection is formed at an intermediate portion in a longitudinal direction of the hosel member, and the heel side end of each shell of the head body is joined to the projection. A wood club for golf as described.