JP2003038689A - Golf club head and attaching method for weight to be attached to the head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and surely fix a weight to the inside of a head body regarding a golf club head and to provide an attaching method for the weight to be attached to it and to provide a head wherein the breakage of the weight fixing part peripheral edge of the head body is presented from inertia force and ball hitting stress at the time of hitting a ball, and an attaching method for a weight to be attached to it. SOLUTION: For the golf club head relating to a claim 1, a projection part for positioning the weight is formed along the boundary of the inner periphery of the side part of a metallic hollow head body and the inner periphery of a sole part inside the head body, the weight is abutted to a projection part for positioning and the weight is welded to the inner periphery of at least one of the side part and the sole part. For an invention relating to a claim 2, in the golf club head mentioned in the claim 1, the projection part for positioning the weight is provided on the inner periphery of at least one of the side part and the sole part.

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 and a method of attaching weights attached thereto.

[0002]

2. Description of the Related Art In recent years, golf clubs called "wood" are replaced with natural woods such as persimmons and cherry trees from the viewpoint of stability of quality and ease of material supply, and the head main body is made of titanium alloy or stainless steel. A metal head (hereinafter, referred to as a "head") formed from a metal material having a hollow outer shell is widely used.

Conventionally, a weight for balance adjustment is fixedly attached to this type of head, but recently, in order to improve the flight distance and directionality of a hit ball, the capacity is increased to provide inertia during hitting. A head having a large moment is mainly used, and the head body tends to be thinned accordingly. For this reason, there are many restrictions on fixing the weight inside the thinned head body, and it is difficult to provide a solid weight receiving portion.

Therefore, today, Japanese Patent No. 2606628 is used.
The method of directly welding the weight to the inside of the head body is widely used as disclosed in Japanese Patent Laid-Open Publication No. 2004-53242, and the weight is usually welded to the side portion or the sole portion of the head body.

[0005]

However, since the side portion of the head body is gently curved toward the sole side, it is difficult to determine the welding position of the weight, and during welding, it is possible to follow the curved shape. There was a problem that the weight moved and the workability was poor.

Similarly, since the side portions are also curved in the toe and heel directions, similar problems have been pointed out in positioning and welding the toe side or heel side of the weight. Also, when welding the weight to the sole portion, by fixing the weight to the back side of the sole portion, the depth of the center of gravity can be increased, which is a preferable head, but the back side of the sole portion is gently curved to the side portion. Therefore, it is difficult to determine the welding position of the weight, and it has been pointed out that the weight moves along the curved shape during welding and the workability is poor.

Further, when the ball is hit, the weight is subjected to inertial force and hitting stress, but as described above, since the head body tends to be thinned, the inertial force and the hitting stress at the time of hitting the thin head body. There was also a possibility that the peripheral edge of the weight welded part would be damaged. The present invention has been devised in view of such circumstances, and it is possible to easily and reliably fix the weight to the inside of the head main body, and the weight fixing portion periphery of the head main body against inertia force and hitting stress at the time of hitting the ball. It is an object of the present invention to provide a head that prevents damage to the head and a method of attaching a weight attached to the head.

[0008]

In order to achieve such an object, a head according to a first aspect of the invention has a hollow head main body made of metal, in which the inner circumference of a side portion and the inner circumference of a sole portion of the head main body are formed. Forming a positioning protrusion of the weight along the boundary with, contacting the weight to the positioning protrusion, and welding the weight to the inner periphery of at least one of the side portion or the sole portion. According to a second aspect of the present invention, in the head according to the first aspect, a weight positioning projection is provided on the inner periphery of at least one of the side portion and the sole portion. .

The invention according to claim 3 is based on claim 2.
In the head described above, the positioning projection on the inner circumference of the side portion or the sole portion intersects with the positioning projection of the weight formed along the boundary between the inner circumference of the side portion and the inner circumference of the sole portion. The invention according to claim 4 is characterized in that the invention according to claim 4 is provided in any direction.
In the head described in the above item 1, the positioning convex portion is a rib that is provided so as to project inside the head main body.

According to a fifth aspect of the present invention, there is provided a weight mounting method in which a weight positioning projection is provided along a boundary between an inner periphery of a side portion and an inner periphery of a sole portion when a hollow metal head body is manufactured. After forming, the weight is positioned at a predetermined position by contacting the positioning convex portion, and the weight is welded to the inner circumference of at least one of the side portion and the sole portion, According to a sixth aspect of the present invention, in the method for attaching the weight according to the fifth aspect, the weight is positioned on the inner circumference of at least one of the side portion and the sole portion when the metal hollow head body is manufactured. After forming the convex portion, the weight is positioned based on the positioning convex portion, and the weight is welded to the inner circumference of at least one of the side portion and the sole portion.

The invention according to claim 7 relates to claim 5
Alternatively, in the weight attaching method according to the sixth aspect, the positioning convex portion is a rib projecting inside the head main body when the head main body is manufactured.

(Operation) Inertia force and hit ball stress act on the weight at the time of hitting a ball, but according to the inventions of claims 1 to 4, the positioning projections reinforce the side part and the sole part, Prevents damage to the periphery of the weight welded part due to inertial force and ball impact stress when hitting a ball.

Further, according to the fifth and sixth aspects of the present invention, when the weight is attached, the weight is brought into contact with the positioning projection to prevent the positioning projection from shifting. Further, the welding position of the weight can be easily found by using the positioning convex portion as a guide. Further, according to the invention of claim 7, since the welding bead hardly spreads around the weight due to the rib during welding, the weight can be reliably welded.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. 1 to 3 show a head according to a first embodiment of claims 1 to 4, and in the drawings,
1 is a top portion 3 and a sole portion 5, except for the opening on the face side.
A head body composed of a hollow outer shell in which the side portions 7 and the like are integrally cast with a titanium alloy. As shown in FIGS. 2 and 3, on the heel side, from the top portion 3 to the sole portion 5, a pipe shape is formed. The hosel part (shaft fastening part) 9 of is formed integrally with the side part 7 on the heel side with a gap provided therebetween.
As shown in FIG. 1, the hosel portion 9 projects obliquely upward from the top portion 3 along the inserting direction of a shaft (not shown),
The shaft fastening hole 11 opens from the top portion 3 side to the sole portion 5 side.

Further, the head body 1 is enlarged (large capacity).
For this reason, the top portion 3, the sole portion 5, and the side portion 7 are made thin as in the conventional case. Meanwhile, FIG. 2 and FIG.
As shown in FIG. 5, inside the head body 1, along the boundary between the inner circumference 7a of the side portion 7 and the inner circumference 5a of the sole portion 5, a rib 13 having a triangular cross-section on the back side extends in the toe and heel directions. And the side portion 7 on the toe side and the heel side with respect to the center line L extending in the front-back direction of the head body 1.
Ribs 15 and 17 each having a triangular cross section continuous with the rib 13 are provided on the inner circumference 7a of the head projection 3 from the inner circumference 3a of the top portion 3 in the direction intersecting with the rib 13 in the top and sole directions of the head body 1. Has been done. Then, on the rib 13 sandwiched between the ribs 15 and 17, a rectangular parallelepiped weight 19 made of a titanium alloy shorter than the dimension between the ribs 15 and 17 is placed and welded to the inner circumference 7a of the side portion 7. In this embodiment, the weights 19 can be placed on the ribs 13 in this way to prevent the weights 19 from being displaced toward the sole portion 5 side during welding. The weight 19
In this embodiment, as shown in FIG. 3, the weight 19 is welded to the inner circumference 7a of the side portion 7 slightly closer to the toe with respect to the center line L.

The ribs 13, 15, and 17 each have a height of at least 0.1 mm or more. Then, a face plate 21 made of a metal material such as titanium alloy and plastically processed by forging or press molding is welded to the face side opening of the head body 1 with a gap between the hosel portion 9 and the present embodiment, The hollow head 23 is formed.

The head 23 according to the present embodiment is configured in this way, and the weight 19 is mounted in the head body 1 as follows according to an embodiment of the invention according to claims 5 to 7. First, as shown in FIGS. 4 and 5, the top portion 3, the sole portion 5, the side portion 7, the hosel portion 9 and the like are integrally molded except for the face side opening portion 25, and the ribs 13, 15, 17 are formed inside. The hollow head body 1 integrally molded with is cast by a conventionally known method using a titanium alloy.

Next, as shown in FIG. 6, the head body 1 is set on the support base 27. A recess 29 is formed on the upper surface of the support base 27 so as to conform to the outer shapes of the sole portion 5 and the side portion 7 of the head body 1, and the back side of the head body 1 faces downward as shown in the drawing. Body 1 to recess 2
When set in 9, the entire face-side opening 25 opens diagonally upward.

Then, as shown in FIG. 6, the face side opening 25 is formed.
Insert the weight 19 into the head body 1 from the
As shown in FIG. 7, the weights 19 are placed on the ribs 13 and the back side of the weights 19 is brought into contact with the inner circumference 7a of the side portion 7 by positioning the weights 5 and 17 as a guide. By thus placing the weight 19 on the rib 13, the rib 13 prevents the weight 19 from being displaced, and the ribs 15 and 17 serve as a guide for the operator to weld the weight 19. The position is easy to understand.

After the weight 19 is placed at the predetermined welding position in this way, as shown in FIG.
When the welding nozzle 31 and the welding rod 33 are inserted from 5 and the peripheral portion of the weight 19 is welded at a plurality of points, the weight 19 is placed on the rib 13 as shown in FIGS. 2 and 3, or the welding bead 35 is interposed. Then, the ribs 13 are fixed to the inner circumference 7a of the side portion 7 while being attached to the ribs 13, and the ribs 13 make it difficult for the welding beads 35 to spread around the weights 19, so that the weights 19 are reliably welded.

After this, the face plate 21 is welded to the face side opening 25, and the head 23 is manufactured. Since the head 23 according to the present embodiment is configured in this way, when a ball is hit with a golf club using the head 23, the weight 19 adjusts the weight balance of the head 23.

Then, when the ball is hit, inertial force and hit ball stress act on the weight 19, but as described above, this embodiment is
Ribs 13, 15, 17 are formed around the welded portion of the weight 19.
Since the ribs 13, 15, and 17 are provided, the side portions 7 are reinforced to prevent damage to the peripheral edge of the weight welded portion due to inertial force and hitting ball stress at the time of hitting the ball. Therefore, according to the head 23 of the present embodiment, damage to the peripheral edge of the weight welded portion due to inertial force and hitting stress at the time of hitting the ball is eliminated, and the golf club can be used for a long time.

Further, according to the attachment method of the weight 19 according to the present embodiment, the weight 19 is placed on the rib 13 when attaching the weight 19 as described above.
The rib 13 prevents the weight 19 from being displaced, and the ribs 15 and 17 serve as a guide to easily find the welding position of the weight 19, so that workability is significantly improved as compared with the conventional case.

Furthermore, according to the attachment method of this embodiment, the welding beads 35 are less likely to spread around the weight 19 due to the ribs 13 during welding, so that the weight 19 can be reliably welded. 9 and 1
0 indicates the second and third embodiments of the head according to claims 1 to 4, respectively, and the head 23-1 shown in FIG.
The weight 19 is placed on the rib 13 along the inside of the rib 15, and its rear surface is brought into contact with the inner circumference 7a of the side portion 7, and the attachment method described above with reference to FIGS. The weight 19 is welded at a plurality of peripheral portions of the weight 19 by the same method. Further, in the head 23-2 shown in FIG. 10, the weight 19 is placed on the rib 13 along the outside of the rib 15. ,
The back side is brought into contact with the inner circumference 7a of the side portion 7,
Through the same method as the mounting method described above with reference to FIG.
The peripheral edge of 9 is welded at a plurality of points.

Thus, these heads 23-1 and 23-2 can also achieve the intended purpose similarly to the head 23 of FIG. 1, and the weight 19 can be attached when the weight 19 is attached. By placing 19 on the rib 13, the rib 13 prevents the weight 19 from being displaced, and the ribs 13 and 15 serve as a guide to easily find the welding position of the weight 19. The attachment workability of 19 is remarkably improved, and since the welding beads 35 are less likely to spread around the weight 19 by the ribs 13 and 15 during welding, there is an advantage that the weight 19 can be reliably welded.

The heads 23-1, 23 shown in FIGS. 9 and 10 are used.
In the case of -2, the weights 19 are placed on the ribs 13 along the inside and outside of the ribs 15. However, even if the weights 19 are placed on the ribs 13 and further separated from the ribs 15 on the toe side, welding is performed. Of course good things. FIG. 11 shows a head according to a fourth embodiment of claims 1 to 4, and a head 23-3 according to this embodiment is the same as the head 23 of FIG. 5, ribs 37 and 39 having a triangular cross section are provided on the inner periphery 5a-1 of the rib 5 so as to project on the same line as the ribs 15 and 17, and the two sides of the weight 19 are brought into contact with the inside of one rib 39 and the rib 13. Then, the peripheral portion of the weight 19 is welded to the inner periphery 5a-1 at a plurality of points by the same method as the attachment method shown in FIGS.

Thus, the head 23-3 according to the present embodiment also exerts inertial force and hitting ball stress on the weight 19 at the time of hitting a ball, but the ribs 13 and 39 attempt to reinforce the sole portion 5 and hit the ball. The damage of the peripheral edge of the weight welded portion due to the inertial force and the hitting stress of the weight 19 is prevented, and the weight 19 is brought into contact with the rib 13 when the weight 19 is attached. In addition, the rib 39 serves as a guide and the welding position of the weight 19 can be easily understood, so that the workability of attaching the weight 19 is remarkably improved as compared with the conventional case.
Since 39 makes it difficult for the welding bead 35 to spread around the weight 19, the weight 19 can be reliably welded.

The welding position of the weight 19 to the inner circumference 5a-1 of the sole portion 5 is not limited to the embodiment shown in FIG. 11, but is required with the ribs 13, 15, 17, 37, 37 as a guide. It may be welded in place. 12 and 13 show a head according to one embodiment of claims 1 to 3, and a head 23-4 according to this embodiment is replaced with the rib 13 of FIG.
A plurality of small protrusions 41 are provided on the back side of the head body 1-2 along the boundary between the inner circumference 7a of the side portion 7 and the inner circumference 5a of the sole portion 5.
Is projected at a narrower interval than the size of the weight 19, and instead of the ribs 15 and 17 of FIG. 3, a plurality of small protrusions 43 are respectively provided on the toe and heel sides of the head body 1-2,
The protrusion is provided in the sole direction.

The weights 19 are placed on the two small projections 41 of the small projections 41 sandwiched between the small projections 43 on the toe and heel sides and welded to the inner circumference 7a of the side portion 7. In the present embodiment, the weight 19 can be placed on the small projection 41 in this way, and the deviation of the weight 19 toward the sole portion 5 side can be prevented during welding, so that the small projections 41 and 43 can be attached to the weight 19. It is used as a guide for the welding position of
Similar to the embodiment of FIG. 3, in the present embodiment as well, a weight 19 is welded to the inner circumference 7a of the side portion 7 slightly closer to the toe with respect to the center line of the head body 1-2.

Since the other structures are the same as those of the embodiment shown in FIG. 1, the same parts are designated by the same reference numerals and the description thereof will be omitted. Thus, according to the present embodiment as well, inertial force and hit ball stress act on the weight 19 at the time of hitting a ball, but a plurality of small projections 41, 43 are formed around the welded portion of the weight 19.
Since the small protrusions 41, 43 group reinforce the side portion 7, the damage of the periphery of the weight welded portion due to the inertial force at the time of hitting and the hitting stress is prevented.

Therefore, also with the head 23-4 according to the present embodiment, it is possible to use the golf club for a long time without damaging the peripheral edge of the weight welded portion due to the inertial force and the hitting ball stress at the time of hitting the ball. . When the weight 19 is mounted in the head body 1-2 as described above, by placing the weight 19 on the plurality of small protrusions 41, each small protrusion 41 prevents the weight 19 from being displaced, Since the small projections 41 and 43 are used as a guide and the welding position of the weight 19 is easily found, there is an advantage that workability is remarkably improved as compared with the conventional case.

Further, since the welding bead which is in contact with the small protrusions 41 and 43 is cooled, it is difficult to spread around the weight 19.

[0033]

As described above, according to the inventions according to claims 1 to 4, damage to the periphery of the weight welded portion due to the inertial force and the hitting stress at the time of hitting the ball is eliminated, and the golf club is maintained for a long time. It is now possible to use.

Further, according to the inventions of claims 5 to 7, when the weight is attached, the weight is brought into contact with the positioning projection to prevent the positioning projection from being displaced, and Since the positioning convex portion serves as a guide to easily find the welding position of the weight, the workability is remarkably improved as compared with the conventional one. Furthermore, since the welding bead hardly spreads around the weight due to the rib during welding, there is an advantage that the weight can be reliably welded.

[Brief description of drawings]

FIG. 1 is a front view of a head according to a first embodiment of claims 1 to 4. FIG.

FIG. 2 is a vertical cross-sectional view of the head shown in FIG.

3 is a cross-sectional view of the head shown in FIG.

4 is a vertical cross-sectional view of a head body of the head shown in FIG.

5 is a cross-sectional view of the head body of the head shown in FIG.

FIG. 6 is a step diagram of the method for attaching the weight according to the embodiment of claims 5 to 7.

FIG. 7 is a step diagram of the method for attaching the weight according to the embodiment of claims 5 to 7.

FIG. 8 is a step diagram of the method for attaching the weight according to the embodiment of claims 5 to 7.

FIG. 9 is a transverse cross-sectional view of a head according to a second embodiment of claims 1 to 4.

FIG. 10 is a cross-sectional view of a head according to a third embodiment of claims 1 to 4.

FIG. 11 is a cross-sectional view of a head according to a fourth embodiment of claims 1 to 4.

FIG. 12 is a vertical cross-sectional view of a head according to an embodiment of claims 1 to 3.

FIG. 13 is a cross-sectional view of a head according to an embodiment of claims 1 to 3.

[Explanation of symbols]

1,1-1,1-2 head body 3 top section 5 sole part 7 Side part 9 Hosel part 13, 15, 17, 37, 39 ribs 19 weights 21 face plate 23, 23-1, 23-2, 23-3, 23-4 heads 25 Face side opening 27 Support 29 recess 31 welding nozzle 33 welding rod 41,43 Small protrusion

Claims (7)

[Claims] 1. A positioning protrusion of a weight is formed in a hollow head main body made of metal along a boundary between an inner circumference of a side portion and an inner circumference of a sole portion of the head main body. A golf club head, characterized in that a weight is brought into contact with the portion and the weight is welded to the inner circumference of at least one of the side portion and the sole portion. 2. The golf club head according to claim 1, wherein a weight positioning projection is provided on the inner circumference of at least one of the side portion and the sole portion. 3. The positioning convex portion on the inner circumference of the side portion or the sole portion is formed in a direction intersecting with the positioning convex portion of the weight formed along the boundary between the inner circumference of the side portion and the inner circumference of the sole portion. The golf club head according to claim 2, wherein the golf club head is provided over the entire length. 4. The golf club head according to claim 1, wherein the positioning convex portion is a rib that is provided so as to project inside the head main body. 5. When manufacturing a hollow head body made of metal,
After forming the positioning projection of the weight along the boundary between the inner circumference of the side portion and the inner circumference of the sole portion, the weight is positioned at a predetermined position by contacting the positioning projection.
A method for attaching a weight, characterized in that the weight is welded to the inner circumference of at least one of the side portion and the sole portion. 6. When manufacturing a hollow head body made of metal,
After forming the positioning protrusion of the weight on the inner circumference of at least one of the side portion and the sole portion, the weight is positioned based on the positioning protrusion, and at least one of the side portion and the sole portion is positioned. The weight attaching method according to claim 5, wherein the weight is welded to the inner periphery of the weight. 7. The weight mounting method according to claim 5, wherein the positioning convex portion is a rib that is provided inside the head main body when the head main body is manufactured.