JP2900880B2 - Golf club head shaft connecting member - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a golf club head having a hollow metal shell structure.
Relates binding members, in particular, head the formed droplet spherical shell, top shell, a plurality of shell portions such as the bottom shell portion and the circumferential side surface shell
The welding work of each shell of the body and the attachment of the shaft to the head body can be easily performed.

[0002]

2. Description of the Related Art Conventionally, in a golf club head of this type (hereinafter referred to as a metal head), a head made of a metal outer shell formed by press molding of, for example, iron, stainless steel or titanium (Ti) alloy. 2. Description of the Related Art There is a known structure in which a main body is formed of a plurality of shells and these shells are joined to each other by welding.

When a shaft is attached to such a metal head, as shown in FIGS. 3 and 4, the shells a1, a2 and a3 constituting the head main body A are welded together with a shaft connecting member. or joined with the external conditions the entire outside of the head body a of the pipe member B, or, as shown in FIGS. 5 and 6, with the inner and pipes member B inside the heads <br/> de body a joined state, the in pipes member B of this by inserting the attachment end side of the shaft C being performed by welding at present.

[0004]

However, in the metal head having the conventional structure described above, FIGS.
When the entire pipe-shaped shaft connecting member B is externally welded to the head main body A as shown in FIG.
The angle of attachment of the shaft connecting member B to the shaft can be easily corrected, but the strength of the joints is inferior, and the mounting direction of the shaft connecting member B at the time of welding work is not only easily unstable , but also the shaft When the connecting member B is
The head center of gravity is
Easy to shift from the sweet spot to the heel side
No.

When the shaft connecting member B is internally joined to the head main body A as shown in FIGS. 5 and 6, the joint strength between them can be sufficiently maintained , and Although there is little movement of the center of gravity , each shell a
1, a2, a3 welding work to the shaft connecting member B,
Formed on the welded portions of the shells a1, a2, a3 after welding.
Polishing work by post-processing
It is not only difficult to correct the mounting angle of the shaft connecting member B with respect to the head body A, but also the shaft connecting member
The length of B is regulated, and the shaft
The mounting position (insertion depth) of C is unstable and
Since the length of the shaft connecting member B is short, the adhesive strength is low.

Further, conventionally, each shell of the head body is
Direct connection to the shaft without using a shaft connection member
And join the lower end of this shaft to the head.
It has a configuration that is welded and fixed to the bottom of the main body.
Even after welding each shell to the shaft and after welding
By the post-processing of the meat bulge formed on each shell
Polishing work, or the shaft
It is not only difficult to correct the mounting angle, but also
There is a problem that it is difficult to finish the fixing part of the body to the head body .

An object of the present invention is to provide a head body and a shell having a metal outer shell structure composed of a plurality of shell portions joined to each other.
Shaft connection of a golf club head for golf clubs that enhances the joining operation of the raft, facilitates correction of the mounting angle of the shaft, and improves mounting strength.
It is to provide a member .

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the invention according to claim 1 of the present invention is directed to a golf wood club head which is welded and joined to a shell of a head body made of a metal material. In the shaft connecting member, the shaft connecting member is formed of a rod-like body that is inserted into an insertion hole formed at the heel side end of the head body,
This rod-shaped body has a shaft insertion hole through which a shaft can be inserted and adhered, and forms a protruding portion at an intermediate portion in a longitudinal direction thereof, and the protruding portion is stepped in a lower end side direction in the longitudinal direction of the rod-shaped body. A small-diameter internal part which is reduced in diameter and is welded by being joined and welded to the open end of the insertion hole at the heel side end of the head main body, and a large-diameter external part which gradually decreases in diameter toward the upper end side. And the inner bottom surface of the shaft insertion hole to which the mounting end portion of the shaft is inserted and adhered in the abutting state, and the opening end of the insertion hole of the heel side end portion of the head main body to the protruding portion. It is characterized in that it is located above the welding site.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings shown in FIGS. 1 and 2. As shown in FIG. This is the club head body.

The head body 1 has a hollow outer shell structure composed of a plurality of shells 11, 12, and 13 of a sheet metal material described later, and an insertion hole is formed in a heel side end 2 serving as a shaft mounting base. An opening 3 is formed, and a shaft connecting member 4 is separately inserted into the insertion hole 3 and provided integrally by welding.

[0011] The shaft coupling member 4, the made rod-shaped body 5 of weldable metal material and each of the shell portions 11, 12 and 13 constituting the head body 1, the bar-shaped body 5, its
From the middle part in the longitudinal direction along the central axis OO
A small-diameter internal part 5a that is reduced in a stepped shape in the direction
With a large-diameter external part 5b that gradually reduces in diameter in the shape of a truncated cone
Projection 8 is formed, and
The shaft 8 can be inserted and bonded to the upper end surface of the attachment portion 5b.
A blind hole-shaped shaft insertion hole 7 is provided.

That is, the shaft connecting member 4 is constructed.
The small-diameter internal part 5a of the rod 5
And the large-diameter external portion 5b
Is exposed to the outside of the head body 1
At the boundary between the small-diameter internal portion 5a and the large-diameter external portion 5b.
The protruding portion 6 integrally formed in the stepped state has a front portion.
The opening end 3a of the insertion hole 3 is joined and locked and welded.
Swelling.

As shown in FIG. 2, the head main body 1 uses a metal sheet made of, for example, rolling as a metal sheet material constituting the outer shell, and arranges the metal sheet in a mold and presses or presses. A plurality of shell portions that are thinned by performing superplastic processing, for example, a striking surface shell portion 11 that forms a striking surface surface which is formed by bending and extending an upper end edge 11a to form a front end portion of a head upper surface; The upper shell part 12 and the lower shell part 13 forming the head upper surface are divided into three parts. The lower shell part 13 is a bottom shell part 14 on the bottom side and a peripheral side shell part on the toe-heel side and the rear side. 15 are integrally formed, and the shells 11, 12, and 13 are welded and joined to each other, so that the total weight of the head is at most 210 g or less, preferably about 200 g. Do not form It is intended.

The heel-side end 12a of the upper shell 12 corresponding to the heel-side end 2 of the head body 1 described above.
The semicircular notch joining portion 1 serving as the insertion hole 3 of the shaft connecting member 4 is provided on the heel side end portion 13a of the lower shell portion 13 and the heel side end portion 13a.
6 and 17 are respectively formed, and these notched joint portions 1 are formed.
The rods 6 and 17 are brought into contact with the projections 6 formed on the shaft connecting member 4 and welded to the rods , respectively.
The large-diameter external portion 5b on the upper end side of the body 5 has a truncated cone shape in the upper end side direction.
The diameter gradually decreases, that is, the small-diameter internal portion 5a and
Is formed on the center axis OO of the rod-shaped body 5.
In a configuration where the diameter gradually increases in the radial direction orthogonal to
That is, at least a part of the head body 1 is formed.
To have a form such that the extending toward the upper surface shell portion 12 side that the heel-side proximate shell surface in those joint portions becomes smooth continuous substantially planar without stepped portion is formed In this way, finishing such as grinding or polishing of the surface of the raised portion generated in the welded portion can be easily performed.

In this case, the small-diameter internal portion 5a of the rod 5 of the shaft connecting member 4 is inserted into the head main body 1.
Further, the tip portion is connected to the lower shell portion of the head body 1.
By extending and abutting toward the bottom shell 14 on the bottom side of the 13, it is possible to weld and fix each other.

The shaft 8 is made of a conventional metal material or a material different from the material of the head body 1 such as CFRP.
Is inserted into the shaft insertion hole 7 provided in the shaft connecting member 4 and adhered, so that the mounting end 8a of the shaft 8 as shown in FIG. In this state, the shaft 8 is mounted, and as shown in FIG.
The inner bottom surface 7a of the shaft insertion hole 7 to which the mounting end portion 8a of the shaft is inserted and adhered in the abutting state is connected to the opening end of the insertion hole 3 of the heel side end portion 2 of the head main body 1 to the protruding portion 6. 3a is located above the welded portion.

That is, according to the present invention, by adopting the above-described structure, the hitting spherical shell 11 and the upper shell 12
And an opening at the heel side end 2 of the head body 1 having a hollow metal shell structure composed of a plurality of shells such as the lower shell 13.
A shaft connecting member 4 made of a metal material that can be inserted and welded into the formed insertion hole 3 is formed by a rod-shaped body 5.
Projecting at an intermediate portion of the rod-shaped body 5 in the longitudinal direction along the central axis OO.
A projection 6 is formed, and each projection 6
Do not join the heel side ends 12a, 13a of
For this purpose, each of the shells 12, 13 and the shaft connecting member 4
The joint position when welding with
At the same time, welding work can be performed easily,
I can go up.

Further , the shaft connecting member 4 is formed at an intermediate portion.
The protrusion 8 to be formed is stepped toward the lower end of the rod 5.
Small-diameter internal part 5a reduced in diameter, and gradually reduced in diameter toward the upper end side
In particular, since it has the form of the large-diameter external portion 5b
The surface of the near-shell portion 12a on the heel side of the face shell portion 12 and the protrusion 6
Surface can be welded continuously and almost flat.
As a result, the finished state by grinding or polishing of the bulge generated in the welded portion is improved.

Further, on the upper end face of the shaft connecting member 4,
A shaft 8 is provided on the inner bottom surface 7a of the shaft insertion hole 7 provided.
Insert and adhere with the mounting end 8a of the
Because of this, the insertion depth of the shaft 8 is regulated,
Thereby, the connection of the shaft 8 to the shaft connecting member 4 is performed.
The combined state becomes stable.

In addition, a dedicated member for forming the shaft connecting member 4 is provided.
The small-diameter internal portion 5a on the lower end side of the body 5 is inside the head main body 1.
It is inserted and fixed, and its upper end side large-diameter external portion 5b is
Because it is made to protrude to the outside of 1, the head like before
There is little movement of the position of the center of gravity, and
Correction of the mounting angle of the shaft 8 and the head of the shaft itself
The fixed part to the body 1 can be easily finished,
Because the length of the shaft connecting member 4 is not limited
In addition, the bonding area between the shaft connecting member 4 and the shaft 8 is increased.
Greatly, the adhesive strength is increased.

Also, by adjusting the weight of the shaft connecting member 4,
Thus, the weight of the entire head can be easily adjusted.

In the above embodiment, the head
Upper shell 12 and lower shell constituting each divided body 1
The two heel side ends 12a and 13a of the
Although it was joined to the intermediate portion of the rod-shaped body 5 of the
Three pieces including the spherical shell 11 or the upper shell 12
Of the heel side end 12a may be joined together.

Further , the rod-like body 5 as the shaft connecting member 4
The protrusion 6 formed at the intermediate portion in the longitudinal direction of the
The same protrusion length over the entire circumference around the central axis OO of 5
But at least in the direction toward the upper shell 12 side.
Open in a fan shape in the direction, and correspond to the upper shell part 12 side.
Increase the protruding length dimension, and hitting surface shell 11 or bottom surface
Flattened flat so that the protruding length dimension of the shell part 14 side becomes small.
It may be a surface form.

[0024]

As is apparent from the above description, according to the present invention , each shell of the head body made of a metal material is welded.
Shaft connecting member to a rod made of metal material
Formed in the middle of a longitudinal rectangle along the central axis of this rod
And a shell is formed on the stop.
Since the heel side ends of the shells are joined, the joint position of each shell and the shaft connecting member when welding is clear.
Installation position is accurate and welding work is easy.
Can be performed, thereby improving the bonding strength.

Further , the shaft connecting member is formed at an intermediate portion.
The diameter of the projecting part decreases stepwise in the direction of the lower end of the rod.
Small-diameter inner part and large-diameter outer that gradually decreases in diameter toward the upper end
In particular, the heel of the upper shell part because of the form with the attachment part
The surface of the shell near the side and the surface of the protrusion are almost flat and continuous.
By this, it is possible to easily perform the finishing by grinding and polishing of the build-up that occurs in the welded portion.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a main part showing an embodiment of a golf club head for golf using a shaft connecting member according to the present invention.

FIG. 2 is an exploded perspective view showing an assembled state of the head.

FIG. 3 is a cross-sectional view of an essential part showing an example of a conventional golf wood club head.

FIG. 4 is an exploded perspective view showing an assembled state of the head.

FIG. 5 is a sectional view showing a main part of another example of a conventional golf wood club head.

FIG. 6 is an exploded perspective view showing an assembled state of the head.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Head body, 2 ... Heel side end part, 3 ...
Insertion hole, 4 ... shaft connecting member, 5 ... rod-shaped body,
5a: small-diameter internal part, 5b: large-diameter external part, 6,.
・ Protrusion, 7: Shaft insertion hole, 8: Shaft, 11: Spherical shell, 12: Upper shell, 12
a: Heel end, 13: Lower shell, 13a
..Heel side end, 14 ... Bottom shell, 15 ... Circumference
Side shell, OO: central axis of rod-shaped body .

Claims (1)

(57) [Claims] 1. A golf club head connecting shaft which is welded and joined to a shell of a head body made of a metal material, wherein the shaft connecting member is formed in an opening at a heel side end of the head body. The rod-shaped body has a shaft insertion hole into which a shaft can be inserted and adhered, and forms a protruding portion at an intermediate portion in the longitudinal direction thereof. A small-diameter internal portion that is reduced in a stepped shape in the lower end direction in the longitudinal direction of the body, and the open end of the insertion hole at the heel end of the head body is joined and locked and welded; And the inner bottom surface of the shaft insertion hole to which the mounting end of the shaft is inserted and adhered in the abutting state, and the head body of the head main body to the protrusion is formed. Heel end insertion A shaft connecting member for a golf club head for a golf club, wherein the shaft connecting member is located above a welding portion at an opening end of the hole.