JP2001104523A - Golf club head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a golf club head having a structure to allow the easy injecting of a packing material into the internal space of the head. SOLUTION: A pipe 3 for fixing a shaft of the golf club head formed by providing a hollow metallic head with the pipe 3 for fixing the shaft has a shaft hole 3a to be fixed with the shaft and particularly at the peripheral edge at its bottom ends abuts on a sole 1b of a head body.

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.

[0002]

2. Description of the Related Art Conventionally, various measures have been taken to inject a filler or the like into the internal space of a metal hollow head. Among them, a hollow head formed by welding an outer shell member has a head main body. Unlike a head formed by casting and having a shaft fixing portion integrally formed along the heel wall, a shaft fixing pipe formed separately from the head main body is often used. For example, Japanese Patent No. 2596294 discloses a technique in which a small hole communicating with a shaft hole is provided on a side surface of a shaft fixing pipe, and a filler is injected into the internal space from the shaft hole through the small hole.

Japanese Patent Application Laid-Open No. H11-76471 discloses a technique in which a U-shaped notch is provided at the lower end side of a shaft fixing pipe attached to a hollow metal head, and a filler is injected through the notch. Have been.

[0004]

However, in each of the above-mentioned prior arts, since the flow path of the filler into the internal space of the head is narrow, a small hole or a U-shaped cut is formed from the shaft hole of the pipe for fixing the shaft. It is difficult to fill the injected filler in the portion leading to the notch, or it is difficult to insert the filler injection nozzle through the shaft hole of the shaft fixing pipe into the internal space of the head. In addition, since a small hole or a notch is formed in the shaft fixing pipe, it takes time to process the shaft fixing pipe.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a golf club head having a structure in which a filler is easily injected into the internal space of the head.

[0006]

According to the present invention, there is provided a golf club head comprising a hollow metal head provided with a shaft fixing pipe, wherein the shaft fixing pipe has a shaft fixed thereto. And the upper portion is fixed to the top side of the head body, and the lower portion contacts the sole side of the head body so that the shaft hole communicates with the hollow portion of the head body. Features.

[0007]

FIG. 1A is a perspective view showing a golf club head according to the present invention, and FIG. 1B is an exploded perspective view thereof.

The head body 1 of the golf club head includes a top portion 1a, a sole portion 1b, a toe portion 1c, and a back portion 1
d, a heel portion 1e, and a face portion 1f, and are formed in a hollow shape by welding the plurality of outer shell members. In this case, each outer shell member is formed of a metal material such as titanium, a titanium alloy, stainless steel, or SUS by casting, pressing, forging, or the like, independently or by integrating arbitrary members, and these are formed. The head body 1 is formed by being mutually welded. In the present embodiment, the top portion 1a and the face portion 1f are formed independently of each other, and the sole portion of the sole portion 1b, the toe portion 1c, the back portion 1d, and the heel portion 1e are integrally formed. In addition,
As shown in FIG. 2, a protrusion 1h having a predetermined height is formed on the sole portion 1b so that a part of a lower end peripheral portion of a shaft fastening pipe described in detail below abuts.

The head main body 1 having the above structure is provided with a shaft fixing pipe 3 to which a shaft (not shown) is fixed. The shaft fixing pipe 3 is formed separately from the outer shell constituting the head main body 1, and has a shaft fixing hole 3a vertically penetrating so as to insert the tip end side of the shaft. Further, the shaft fixing pipe 3 has a top part 1a.
And a cylindrical lower portion 3c protruding into the hollow portion of the head. The upper portion 3b is formed in a skirt shape such that the outer peripheral surface gradually increases in diameter as it goes down. The lower portion 3c is formed in a cylindrical shape having a smaller diameter than the lower end of the skirt. The shaft fixing hole 3a penetrates from the upper part to the lower part, and a step part 3f to which a lower end of the shaft, a weight material or the like is applied is formed in an intermediate part thereof.

Next, in this embodiment, the formation of the head main body 1 and the shaft fixing pipe 3
The step of mounting is described. First, the above-mentioned sole portion 1b, toe portion 1c, back portion 1d and heel portion 1
The face part 1f is welded to the front peripheral edge of the outer shell body of the sole side portion composed of e. Next, a part of the lower peripheral edge formed so as to be orthogonal to the axis P of the shaft fixing pipe 3 is brought into contact with the protrusion 1h formed on the sole 1b, and the shaft is attached to the upper part of the heel 1e. The upper part 3b of the fastening pipe 3 is welded (a weld bead is denoted by reference numeral 5), and the top part 1a is welded to the upper opening of the outer shell of the sole side part and the upper part 3b of the shaft fastening pipe. The upper part 3b side of the shaft fixing pipe 3 is fixed to the top side of the head, and the lower part 3c is fixed by contacting with the sole side of the head to form a head as shown in FIG. In addition, a shaft fixing pipe 3 is attached to the protrusion 1h.
When a part of the peripheral edge of the lower end is brought into contact, it is preferable that both are fixed by welding. In this manner, the fixed state of the shaft fastening pipe can be stabilized by welding the shaft fastening pipe vertically to the top side and the sole side of the head body.

According to the above configuration, a part of the lower peripheral edge of the shaft fixing pipe 3 is brought into contact with the sole portion 1b to widen the gap between the lower end opening of the shaft fixing pipe 3 and the sole portion 1b. When the filler is injected through the shaft fixing pipe 3 after the head is formed, the flow path is widened, and the filler is not stagnated, and the filling operation can be easily performed. Become like In addition, since the shaft fixing pipe 3 does not form a small hole, a U-shaped notch, or the like, the configuration can be simplified. Further, in the present embodiment, as shown in FIG. 2, a protrusion 1h is formed on the sole portion 1b, and a part of a lower end peripheral portion of the shaft fixing pipe 3 is brought into contact with the protrusion 1h. A wider flow path for the filler is ensured, and the injection of the filler can be performed more easily. Specifically, protrusion 1
h is the distance between the lower end center point P1 of the shaft fixing pipe 3 and the point P2 at which the axis P passing through the lower end center point P1 intersects the surface of the sole portion 1b, that is, the opening lower end of the shaft fixing pipe 3 2. The distance between the center and the sole is 3.
It is preferable to form it at a height of about 0 mm or more.

The above-mentioned filler is not limited to the one filling the internal space of the head, but may be such that it adheres to the inner wall of the outer shell member that defines the internal space.
Specifically, it includes all materials to be injected into the head, such as a foamed synthetic resin and an adhesive (which may have fluidity) for capturing dust. The filling can be performed by directly injecting through the fixing hole 3a of the shaft fixing pipe 3, or by inserting a nozzle into the fixing hole 3a.

Next, another embodiment of the present invention will be described (in the following embodiments, the same portions as those of the structure shown in FIG. 2 are denoted by the same reference numerals, and the description thereof is omitted). .

FIG. 3 shows that, instead of forming a projection on the sole portion 1b, the weld bead 7 is piled high from the sole portion 1b to the heel portion 1e, and a part of the lower end peripheral portion of the shaft fixing pipe 3 is placed on the sole side. It is a figure which shows the embodiment which welded.
In this case, the amount of the weld bead 7 is, as in the configuration shown in FIG. 2, the lower end center point P1 and the point P2 of the shaft fastening pipe 3.
Is preferably formed at a height such that the distance between the two is not less than 3.0 mm. Also in this embodiment, the flow path of the filler is secured between the sole portion 1b and the filler can be easily injected, and the shaft fixing pipe 3 is formed with a small hole, a notch, or the like. You don't have to. As described above, the protrusion is formed such that a bead is piled up on the sole portion 1b or the heel portion 1e or the heel portion 1
The weld bead 7 can be formed high up to e. Further, the lower surface of the shaft fixing pipe 3 may be welded by a welding bead 7.

FIG. 4 shows a lower portion 3 of the shaft fixing pipe 3.
It is a figure which shows embodiment which diameter-increased gradually c toward the downward direction (The diameter expansion part is shown with the code | symbol 3g). Sole part 1
A part of the periphery of the enlarged diameter portion 3g is welded to the heel portion 1e near b. Also in this embodiment, the sole portion 1b
And a flow path of the filler is secured between them, so that the filler can be easily injected.

FIG. 5 shows a projection 1h formed on the sole 1b.
Is a diagram showing an embodiment in which the sole is formed by the shape of the sole itself. A part of the lower peripheral edge of the shaft fixing pipe 3 is welded to the projection 1h formed at a portion that transitions from the sole portion 1b to the heel portion 1e by the welding bead 7. In this case, it is preferable that the height of the protrusion 1h be set to such a height that the distance between the lower end center point P1 and the point P2 of the shaft fastening pipe 3 becomes 3.0 mm or more, as described above. Also in this embodiment, the flow path of the filler is secured between the sole portion 1b and the filler can be easily injected, and the shaft fixing pipe 3 is formed with a small hole, a notch, or the like. You don't have to.

FIG. 6 shows the lower part 3 of the shaft fixing pipe 3.
It is a figure which shows embodiment which made c thin gradually as it goes down (thin part is shown by code | symbol 3h). In the sole portion 1b (boundary portion between the sole portion 1b and the heel portion 1e),
A part of the peripheral portion of the thin portion 3h is welded by the weld bead 7. Also in this embodiment, the flow path of the filler is secured between the sole part 1b and the filler can be easily injected.

FIG. 7 shows a lower portion 3 of the shaft fixing pipe 3.
FIG. 7C is a diagram showing an embodiment in which c is cut obliquely so that the head hollow portion side is opened. The weld bead 7 welds a part of the lower peripheral edge of the heel side, which is obliquely cut, to the sole portion 1b (a boundary portion between the sole portion 1b and the heel portion 1e). Also in this embodiment, the sole 1
The flow path of the filler is secured between the first and second b and the filler can be easily injected.

As in the above embodiment, the lower part of the shaft fixing pipe (part of the lower peripheral edge and part of the lower outer peripheral surface) has a heel side (sole part, heel part,
Or these boundaries).
The shaft fixing pipe and the heel side may be in direct contact, or may be in contact via a bead. The configuration examples shown in FIGS. 2 to 7 described above can be implemented in appropriate combinations.

[0020]

According to the present invention, a metal hollow head having a structure in which a filler is easily injected into the internal space of the head can be obtained.

[Brief description of the drawings]

FIG. 1 is a view showing a golf club head according to the present invention, wherein (a) is a perspective view of the golf club head, and (b) is an exploded perspective view thereof.

FIG. 2 is a view showing the first embodiment of the present invention, and is a view showing a structure for attaching a shaft fixing pipe to a head main body.

FIG. 3 is a view showing a second embodiment of the present invention, and is a view showing a structure for attaching a shaft fixing pipe to a head main body.

FIG. 4 is a view showing a third embodiment of the present invention, and is a view showing a structure for attaching a shaft fixing pipe to a head main body.

FIG. 5 is a view showing a fourth embodiment of the present invention, and is a view showing a structure for attaching a shaft fixing pipe to a head main body.

FIG. 6 is a view showing a fifth embodiment of the present invention, and is a view showing a structure for attaching a shaft fixing pipe to a head main body.

FIG. 7 is a view showing a sixth embodiment of the present invention, and is a view showing a structure for attaching a shaft fixing pipe to a head main body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Head 1a Top part 1b Sole part 1h Projection 3 Shaft fixing pipe 3a Shaft fixing hole 3b Upper part 3c Lower part 5, 7 Welding part

Claims (6)

[Claims] 1. A golf club head in which a hollow metal head is provided with a shaft fixing pipe, wherein the shaft fixing pipe has a shaft hole in which a shaft is fixed, and an upper part is a top of a head body. A golf club head, wherein the shaft hole is communicated with a hollow portion of the head body, with the lower portion abutting on a sole side of the head body. 2. The golf club according to claim 1, wherein a projection is formed on a sole side of the head body, and a lower portion of the shaft fixing pipe is in contact with the projection. head. 3. The golf club head according to claim 1, wherein a part of a lower side of the shaft fixing pipe is welded to the sole side or the protrusion. 4. The golf club head according to claim 1, wherein the diameter of the shaft fixing pipe gradually increases toward a lower end opening. 5. The golf club head according to claim 1, wherein the shaft fixing pipe is formed to be gradually thinner toward a lower end opening. 6. The golf club head according to claim 1, wherein a distance between a center of a lower end of the shaft fixing pipe and the sole is 3.0 mm or more.