JP2817619B2 - Golf wood club manufacturing method - 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 wood club having a hollow metal head.

[0002]

2. Description of the Related Art As described in, for example, JP-A-63-154186, there is known a golf wood club head in which a head body is made of metal and hollow. It is so-called metal wood. In the head described in the above publication, two or three outer shell members each formed by forging are welded to form a head main body. The division is performed, for example, by dividing the face, the sole, the toe, the heel and the back, and the top into three parts, or before and after having a dividing line in the middle of the sole, the toe, the heel, and the top. And the like. Further, a shaft connecting pipe for connecting a shaft is provided separately from the outer shell member, and this is fixed to the outer shell member by welding. At the time of this fixing, the lower end of the shaft connection pipe is butted against the sole portion of the outer shell member.

However, as described above, when two or three outer shell members and a shaft connecting pipe are joined to each other to form a head, the number of members is large, so that the number of man-hours such as manufacturing and welding is large. And cost increase. In addition, since the shaft connection pipe is separate, there is a problem in the strength of the shaft connection. Further, since the lower end of the shaft connecting pipe protruding upward from the top of the head is extended to the sole portion, the front side of the head becomes heavy due to the shaft connecting pipe. When the front side of the head becomes heavier, the sweet area becomes smaller.
The sweet area is an area on the face where the shot ball flies straight and well. ) Is good.

An iron club head, not a wood club head, is disclosed in Japanese Utility Model Laid-Open Publication No. 58-185252. The front face is formed on the rear side of a substantially plate-like face member integrally formed with a shaft connecting portion. It describes that an open container-shaped balance weight is joined. The joint surface between the face member and the balance weight is flat. With the configuration described in Japanese Utility Model Laid-Open No. 58-185252, the head is composed of two members, and the number of members is small. However, the wood club head and the iron club head differ in the positional relationship between the face and the shaft.
However, the configuration described in Japanese Patent Application Laid-Open Publication No. H10-15064 cannot be directly applied to a wood club head.

[0005]

As described above, in a conventional hollow metal wood club head, two or three outer shell members and a shaft connecting pipe separate from these members are welded to each other. Since the head body is formed and the number of constituent members is large, the number of manufacturing steps is increased, the cost is increased, and the strength of the shaft connection is weak. Further, since the lower end of the shaft connecting pipe extends to the sole portion, the front side of the head becomes heavy, and there is a problem that the sweet area is narrow.

The present invention is intended to solve such a problem. The number of constituent members is small, the number of manufacturing steps can be reduced, the cost can be reduced, and the strength of the shaft connecting portion can be increased. It is a first object of the present invention to provide a method of manufacturing a golf wood club in which the loft angle can be easily adjusted in manufacturing and the depth of the center of gravity can be increased. A second object is to facilitate setting of weight distribution in the head.

[0007]

According to a first aspect of the present invention, there is provided a hollow metal member having a face on a front surface and a shaft connecting portion protruding from an upper portion on a heel side in order to achieve the first object. The head includes a substantially plate-shaped face member having a face, and a container-shaped rear shell member having an open front surface joined to the rear side of the face member. Is formed integrally with the shaft connection portion by bulging rearward on the upper portion on the heel side,
The said rear shell member, a said face member of the shaft connecting portion golf wood club manufacturing method of forming the base portion fits notch of the lower to the heel side of the upper surface portion front, the A face member including a shaft connection portion is formed by die forging, a through hole for connecting a shaft is formed in the shaft connection portion by cutting after forging, and the face member and a rear outer shell member are welded. Is what you do.

According to a second aspect of the present invention, in the method of manufacturing a golf wood club of the first aspect of the present invention, in order to achieve the second object, a rear surface of the face member is removed except for a peripheral portion thereof. A recess is formed.

[0009]

In the method for manufacturing a golf wood club according to the first aspect of the present invention, a substantially plate-like face member is formed by die forging, and a container-like rear shell member is welded to the rear side of the face member. The shaft is connected to a shaft connecting portion integrated with the face member. The through hole for this connection is formed in the shaft connection part by cutting after forging. Also, this shaft connection portion is formed by bulging rearward on the upper portion of the face member,
At the time of the joining, the lower base is fitted into the notch on the front side of the upper surface of the rear shell member. In this way, the face member and the shaft connecting part are integrated, but since the face member is simply a plate-shaped one, when manufacturing this by forging, it is easy to adjust the loft angle, etc. Can be. Further, since the shaft connection portion is located above the face member but not below the face member, the front side of the head is lightened. Thereby, the depth of the center of gravity is deepened, and the sweet area is expanded.

In the method for manufacturing a golf wood club according to the second aspect of the present invention, a concave portion is formed on the rear surface of the face member. By setting the position and size of the concave portion, the weight distribution is set on the face side. Can be. Since the concave portion is formed on the rear surface of the face member except for the peripheral portion, the weight distribution of the head is more concentrated on the peripheral portion with respect to the face, and the sweet area becomes wider. Further, for example, if the concave portion is provided on the heel side, the weight distribution of the head is more deviated toward the toe side, and the golf club is suitable for a player who tends to slice. On the other hand, if the recess is provided on the toe side, the weight distribution of the head will be on the heel side,
A golf club suitable for players who tend to be more biased and hooked.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The first embodiment of the golf wood club of the present invention will be described below.
An embodiment will be described with reference to FIGS. The golf wood club head of the present embodiment is made of a hollow metal. Various metals such as pure titanium, titanium alloy (specific gravity of about 4.6), stainless steel and other light alloys are used as the metal. Also, in the drawing, 1a is a front face, 2a is a rear back, 3a is a lower sole, 4a is an upper top, 5a is a toe on one side, 6a is a heel on the other side, and this heel 6a The shaft 8a is connected to a pipe-shaped shaft connecting portion (neck portion) 7a protrudingly formed on the upper side. The lower portion of the outer peripheral surface of the shaft connecting portion 7a is a curved surface 9a smoothly connected to the top 4a, the face 1a, and the heel 6a. The shaft connecting portion 7a has a through hole 10a for connecting the shaft 8a.

The head has a substantially plate-like face member 11 having the face 1a and the shaft connecting portion 7a.
a and a container-shaped rear shell member 12a having an open front surface having other portions.
a is welded to and joined to the rear side of the face member 11a. The shaft connecting portion 7a protruding upward is formed integrally with the face member 11a on the upper side of the heel 6a by bulging rearward. On the contrary,
On the heel 6a side on the front side of the upper surface of the rear shell member 12a,
Lower base portion of the shaft connection portion 7a of the face member 11a
A cutout portion 14a into which 13a fits is formed. further,
A concave portion 15a is formed on the rear surface of the face member 11a except for its peripheral portion.

A face member including the shaft connecting portion 7a
Each of the rear shell member 11a and the rear outer shell member 12a is basically manufactured by die forging. However, cutting after forging and the like are performed as necessary, such as through holes 10a in the shaft connection portion 7a. Further, the rear outer shell member 12a can have an undercut shape in an arbitrary direction, but the rear outer shell member 12a having such a shape can be formed without any problem by several steps of die forging. it can. Then, the face member 11a thus manufactured and the rear outer shell member 12a are welded and connected. At this time, the base 13a of the shaft connecting portion 7a of the face member 11a is
Fit into 14a. Further, after welding the face member 11a and the rear outer shell member 12a, the head is filled with a filler such as urethane foam through the through hole 10a in the shaft connection portion 7a, if necessary. After that, the shaft 8a is connected to the shaft connecting portion 7a.

According to the configuration of the above embodiment, the entire head is composed of the face member 11a and the rear outer shell member 12a, including the shaft connecting portion 7a, so that the number of constituent members can be reduced. In addition, the number of manufacturing steps can be reduced and the cost can be reduced.

Further, a shaft connecting portion is connected to the face member 11a.
Since the 7a is formed integrally, the strength of the shaft connecting portion 7a can be increased as compared with a case where another member is welded, and the shaft
8a connection strength can be increased. Moreover, the face member 11a
Is originally required to have higher strength than other parts and must be thicker, which is more advantageous in increasing the strength of the shaft connecting portion 7a.

Further, while securing the strength of the shaft connecting portion 7a, the shaft connecting portion 7a can be extended to the upper portion of the face member 11a but not to the lower portion. Thereby, the front side of the entire head can be reduced in weight. The rear side of the entire head can be made heavier by the weight reduction of the front side of the entire head. Thereby, the depth of the center of gravity of the entire head can be deepened, and the sweet area can be widened. In addition, an integral weight may be formed at the rear portion in the rear outer shell member 12a, or a separate weight may be fixed by welding.

The loft angle, that is, the angle between the vertical plane and the face 1a can be adjusted by setting the angle of the shaft connecting portion 7a with respect to the face 1a.
The angle of the shaft connecting portion 7a with respect to the face 1a can be easily and accurately set at the time of manufacture, partly because the 11a is simply a plate. That is, the face member 11
The loft angle can be adjusted in each of several stages of forging process for a. After the forging process, the face member 11
In order to obtain the final shape and dimensions of a, a straightening step using a straightening press is performed, and the loft angle can be adjusted also in this straightening step. Further, since the face member 11a is merely a plate-like member, the front edge 16a of the upper surface or the side surface of the rear shell member 12a is also cut by a laser processing machine or the like, as shown by a chain line in FIG. In addition, the loft angle can be adjusted. The fact that the loft angle can be adjusted in several steps during manufacturing is also advantageous for the accurate setting of the loft angle.

A recess 15a is formed on the rear surface of the face member 11a except for the peripheral portion thereof.
The weight distribution of the head is more concentrated on the periphery with respect to the face 1a, and the sweet area is wider.

The number of recesses formed on the rear surface of the face member can be easily set, for example, at the time of forging, the number, size, position and depth. In, the setting of the weight distribution can be freely and easily made. For example, in the second embodiment shown in FIG. 5, the recess 15b is formed on the heel 6b side of the rear surface of the face member 12b.
Is formed. In the third embodiment shown in FIG. 6, a recess 15c is formed on the toe 5c side of the rear surface of the face member 12c. Further, in the fourth embodiment shown in FIG. 7, a recess 15d is formed above the rear surface of the face member 12d. In addition,
In the reference numerals shown in FIGS. 5, 6 and 7, the same numerals are used for the parts corresponding to those in the first embodiment, and the suffixes b, c and d are respectively added thereto. The same applies to FIG. 8 showing the fifth embodiment, where the suffix is e.

If the recess 15b is provided on the heel 6b side as in the second embodiment, the weight distribution of the head is more deviated toward the toe 5b side, and the golf club is suitable for a player who tends to slice. On the other hand, as in the third embodiment, the recess 15c is towed.
If provided on the 5c side, the weight distribution of the head is more biased toward the heel 6c side, and the golf club is suitable for a player who tends to hook. Further, if the concave portion 15d is provided on the upper side as in the fourth embodiment, the center of gravity can be further reduced, whereby the ball can be more easily raised and the flight distance can be increased.

FIG. 8 shows a fifth embodiment of the golf wood club of the present invention. In the fifth embodiment, most of the shaft connecting portion 7e is also formed integrally with the face member 11e. In addition, the rear lower side 17e of the shaft connecting portion 7e is formed integrally with the rear outer shell member 12e. Thus, the joining line between the face member 11e and the rear shell member 12e becomes closer to one straight line and one plane. Therefore, welding of the face member 11e and the rear outer shell member 12e becomes easier. The rear lower side 17e of the shaft connecting portion 7e may be formed integrally with the rear outer shell member 12e during forging, or may be formed as a build-up during welding.

It should be noted that the present invention is not limited to the above embodiment, and various modifications can be made. For example,
In the above embodiment, the shaft connection portion is formed by penetrating a shaft connection hole, but this hole does not necessarily have to penetrate.

[0023]

According to the first aspect of the present invention, a substantially plate-like face member is formed by die forging, and a container-like rear shell member having an open front surface is welded to the rear side of the face member by welding. Joined to form the head of the wood club, the face member has a through hole for connecting the shaft at the upper part on the heel side, and the shaft connection part formed by cutting after forging swells to the rear side. formed integrally Te, the rear shell member, the base portion of the lower shaft connecting portion of the face member to the heel side of the upper surface portion front side to form a full notch fitting, can reduce the component count In addition, the number of manufacturing steps can be reduced and the cost can be reduced. In addition, by forming the shaft connection portion integrally with the face member, the strength of this shaft connection portion can be increased, but since the face member is simply a plate-shaped member, when this is manufactured by forging, Adjustment of the loft angle and the like can be easily performed. Further, since the shaft connection portion may be provided only on the upper portion of the face member, the front side of the head can be reduced in weight, the center of gravity can be deepened, and the sweet area can be widened.

Further, by forming a concave portion on the rear surface of the face member as in the second aspect of the present invention, it is possible to easily set the weight distribution in the head, and the concave portion is formed on the rear surface of the face member at the peripheral portion thereof. The sweet area can be made wider because the weight distribution of the head is more concentrated on the peripheral portion with respect to the face.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a first embodiment of a golf wood club of the present invention.

FIG. 2 is a perspective view of the back side of the face member.

FIG. 3 is a perspective view of the entire head manufactured as above.

FIG. 4 is a cross-sectional view of the entire head manufactured as above.

FIG. 5 is a rear view of a face member showing a second embodiment of the golf wood club of the present invention.

FIG. 6 is a rear view of a face member showing a third embodiment of the golf wood club of the present invention.

FIG. 7 is a rear view of a face member showing a fourth embodiment of the golf wood club of the present invention.

FIG. 8 is an exploded perspective view showing a fifth embodiment of the golf wood club of the present invention.

[Explanation of symbols]

 1a, 1e Face 6a, 6b, 6c, 6d, 6e Heel 7a, 7b, 7c, 7d, 7e Shaft connection 8a Shaft 10a, 10e Through hole 11a, 11b, 11c, 11d, 11e Face member 12a, 12e Rear outside Shell members 14a, 14e Notches 15a, 15b, 15c, 15d Recess

Claims (2)

(57) [Claims] 1. A hollow metal head having a face on a front surface and a shaft connecting portion protruding from an upper portion on a heel side, comprising a substantially plate-like face member having a face, A container-shaped rear outer shell member having an open front surface joined to the rear side of the member. The shaft member is formed integrally with the face member by swelling the shaft connecting portion rearward at an upper portion on the heel side. and, to the rear shell member is a said face member of the shaft connecting portion golf wood club manufacturing method of forming the base portion fits notch of the lower to the heel side of the upper surface portion front Forming a face member including the shaft connection portion by die forging, forming a through hole for connecting the shaft by cutting after forging in the shaft connection portion, and forming the face member and the rear outer shell member. Welding A method for manufacturing a golf wood club. 2. The method according to claim 1, wherein a concave portion is formed on a rear surface of the face member except for a peripheral portion thereof.