JP2002126134A - Golf club - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a golf club having a head to be hardly deformed by the thermal effect of the welding. SOLUTION: Separate reinforcing members 12 and 13 are mounted inside the front edge 8A of a crown shell 8. The front edge 8A side is made thick, and the upper edge 4A of a face shell 4 and the front edge 8A of the crown shell 8 are jointed by welding. A plurality of projections 11 are formed in the front edge 8A of the crown shell 8 to be engaged with the upper edge 4A of the face shell 4. The front edge 8A side of the crown shell 8 is made thick with the thickness of the reinforcing members 12 and 13 added to the thickness of the front edge 8A. Therefore, the thermal deformation of the head at the time of welding can be prevented, and further, dropping of the front edge 8A at the time of welding can be also prevented, so that the upper edge 4A and the front edge 8A can be jointed as designed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a golf club in which a shaft is connected to a head having a plurality of split shells.

[0002]

Heretofore, as a wood-type head called a metal wood or the like, there has been known a head formed by integrally joining a plurality of metal shells. In such a head, peripheral portions of a plurality of metal shells are integrated by welding.

As the size and the center of gravity of such a head increase, the thickness of each of the divided shells constituting the head also decreases. Specifically, using a β-type titanium alloy, the face has a thickness of 2.5 to 3.0 mm, and the sole and the crown have a thickness of about 1 mm or less. There is a problem in that when such thin shells are welded and joined, the shells are deformed due to the heat effect of welding. Specifically, when the crown and the face are joined, a phenomenon in which the leading edge of the crown falls inside tends to occur. In such a case, polishing, which is a post-process, is excessively performed to obtain a predetermined shape of the head, and the welded portion becomes thin. As a result, it is not possible to withstand the impact of the shot of the golf ball, and cracks and the like may occur.

[0004] On the other hand, in the metal wood type head, the edges of a plurality of metal shells are welded and integrated, but since welding is performed by abutting the peripheral edges, the weld bead is formed inside. There is also the problem of too much. The weld bead is formed in such a manner that the entire welded portion is substantially ascended substantially along the welding progress direction. However, if the bead falls into the inside, the bead asperity in that portion is depressed. For this reason, the beads are repeatedly provided again. When the beads are repeatedly piled in this way, the heat associated with welding is more applied, so that deformation is likely to occur, and if the beads are piled up many times, it will be difficult to confirm the connection shape of each part, etc. There is also a problem. In addition, the applied heat changes the strength properties of the titanium alloy material, lowers the brittleness, and leads to a problem that the vicinity of the weld is broken. Alternatively, even if a non-solution-treated material is used, a certain degree of transformation may occur due to welding heat.

Japanese Patent Application Laid-Open No. H11-114106, paragraphs 0008 to 00010, describe that at the time of joining a face portion to the opening of a hollow metal head body opening to the face portion side, at least an opening end of the head body. A golf club head having a plurality of convex portions in contact with the other at one of the peripheral portion of the portion and the face portion, burying a bead in a concave portion formed between the convex portions, and fixing the face portion to the opening. Heating while applying a welding member to a concave portion between the convex portions formed when the face portion is brought into contact with the head body, melting the welding member and filling the concave portion, A method of manufacturing a golf club head in which a portion is fixed to a head body is disclosed. By such means, the bead is located in the concave portion between the convex portions at the joint portion between the head main body and the face portion and does not overlap with the head main body (face portion), so that the face portion side is lightened. Things.

However, even in the above-mentioned publication, there is a problem that even if each thin shell is welded and joined, the shell is deformed by the influence of heat of welding. Further, in the above-mentioned publication, since one of the projections is provided so as to be in contact with the other and the bead is buried in the recess between the projections, there remains a problem that the weld bead excessively enters through the recess.

Accordingly, the present invention provides a golf club in which a shaft is connected to a head composed of a plurality of split shells, wherein the head is formed by joining a plurality of metal shells, the head being deformed by the heat of welding. It is an object to provide a golf club having a hard head. The present invention also provides a golf club having the head formed by joining a plurality of metal shells, the golf club having a head that prevents a weld bead from entering too much and prevents excessive heat from being applied by welding. The purpose is to provide.

[0008]

According to a first aspect of the present invention, in a golf club in which a shaft is connected to a head having a plurality of divided shells, at least one of the peripheral edges of at least one of the divided shells to be joined is meat. A golf club characterized by being formed thick.

According to the first aspect of the present invention, the at least one peripheral edge portion can be reinforced by making the peripheral portion thick, and can resist thermal deformation during welding.

According to a second aspect of the present invention, in a golf club in which a shaft is connected to a head including a plurality of divided shells, at least one peripheral inner surface of the divided shells to be joined is provided with:
A golf club characterized in that a separate reinforcing member is provided on all or a part and is formed thick.

According to the second aspect of the present invention, the reinforcing member can be reinforced by providing a separate reinforcing member and having a large thickness, and can withstand thermal deformation during welding.

According to a third aspect of the present invention, in a golf club in which a shaft is connected to a head having a plurality of divided shells, at least one peripheral inner surface of the divided shells to be joined is provided.
A golf club characterized in that a separate reinforcing member is provided in whole or in part so as to protrude from an end of a split shell and is formed thick.

According to the third aspect of the present invention, the reinforcing member can be reinforced by providing a separate reinforcing member and having a large thickness, can resist thermal deformation at the time of welding, and can further prevent the end of the divided shell from the end. By contacting the protruding reinforcing member with the other split shell, the two can be arranged at a predetermined interval.

According to a fourth aspect of the present invention, in a golf club in which a shaft is connected to a head composed of a plurality of divided shells, a plurality of projections are provided at at least one end of the divided shells to be joined, and the projections are provided. A golf club characterized by being locked to an end of the other split shell.

According to the structure of the fourth aspect, by locking the protruding portion to the end of the other split shell, it is possible to prevent the protruding portion from dropping during welding or the like.

According to a fifth aspect of the present invention, in a golf club in which a shaft is connected to a head composed of a plurality of divided shells, at least one peripheral inner surface of the divided shells to be joined has
It is a golf club characterized in that a built-up portion is provided in all or a part.

According to the fifth aspect of the present invention, since the thickened portion is provided to form the thickened portion, it can be reinforced and resist thermal deformation during welding.

[0018]

Embodiments of the present invention will be described below with reference to the accompanying drawings. This will be described with reference to FIGS. A metal-wood golf club called a metal wood club or the like includes a head 1 and a shaft 3 connected to a hosel 2 which is a shaft mounting portion of the head 1. The head 1 is formed by joining and integrating a plurality of metal shells. In this embodiment, the face shell 4 on the front side made of a β-type titanium alloy, the sole / side peripheral shell 7 and the crown shell 8 having the sole portion 5 and the side peripheral portion 6 formed thereon are integrally welded at their peripheral edges. It is a thing. A shaft mounting pipe 10 is disposed in the hollow portion 9 of the head 1 through the hosel 2, and the lower portion of the shaft 3 is inserted into the pipe 10. The thickness of the crown shell 8 is the sole / side shell 7.
The thickness of the sole / side peripheral shell 7 is smaller than the thickness of the face shell 4.

A plurality of projections 11 are provided at the end of the front edge 8A of the crown shell 8, which is one of the peripheral edges to be joined, and the upper edge 4A of the face shell 4 to which the projections 11 are joined. And lock it so that it rests on the end of the. This protrusion
Reference numeral 11 denotes a protrusion length A which is the same as or slightly shorter than the thickness B of the upper edge 4A of the face shell 4, for example, about 2 to 3 mm, and the width C is approximately the same as the protrusion length A.
For example, it is formed to about 2 mm. In the embodiment, the protrusion
11 are formed at four locations at an interval on the left and right.

Further, reinforcing members 12, 13 are integrally fixed inside the front edge 8A of the crown shell 8 along the front edge 8A. The reinforcing members 12 and 13 are disposed on the right and left sides, which may be inferior in strength only along the front edge 8A, and have a thickness D substantially equal to the thickness E of the front edge 8A, for example, 1 mm.
The width W is formed to be about 5 mm and is along the front edge 8A. In the embodiment, the leading edge 8A
Are integrally provided by spot welding or the like on both sides. The front edges 12A, 13A of the reinforcing members 12, 13 project from the end of the front edge 8A. The protruding length F is smaller than the protruding length A, for example, about 1 mm.

Next, the manufacturing method will be described. Head 1
Is formed by integrating a face shell 4, a sole / side peripheral shell 7 having a sole part 5 and a side peripheral part 6, and a crown shell 8 by welding their edges. The welding is performed by TIG welding, and the sole / side peripheral shell 7 and the crown shell 8 having the sole part 5 and the side peripheral part 6 formed by 1 mm as described above.
Since the thickness is as thin as E or less, its T
The current value of the IG welding is 40 to 50 A, and the current value 8 of the welding of the face shell 4 formed to a thickness B of 2 to 3 mm or more.
It is preferably lower than 0 to 90A. In welding the upper edge 4A of the face shell 4 and the front edge 8A of the crown shell 8, first, the tips of the front edges 12A and 13A of the reinforcing members 12 and 13 abut against the rear surface of the face shell 4, and furthermore, the protrusions 11 Is placed on the upper edge 8A of the face shell 4 and locked. By disposing the face shell 4 and the crown shell 8 in this manner, a gap 14 of, for example, about 1 mm is formed between the rear surface of the face shell 4 and the front edge 8A between the reinforcing members 12 and 13.
The welding is performed by placing a bead 15 between the upper edge 4A of the face shell 4 and the front edge 8A of the crown shell 8. Even if the leading edge 8A side of the crown shell 8 tries to be thermally deformed due to welding heat during such welding, the reinforcing member 12,
Since the front edge 8A is reinforced by 13, the deformation can be prevented against thermal deformation. In addition, welding is performed in a state where the protruding portion 11 is placed and locked on the upper edge 4A of the face shell 4, so that the front edge 8A falls into the head 1 due to thermal deformation due to welding heat. There is no such thing, the upper edge 4A of the face shell 4 and the front edge 8A of the crown shell 8
Can be welded so as to maintain the shape and the like as designed.
Moreover, a reinforcing member protruding from the front edge 8A of the crown shell 8
The front edges 12A, 13A of the 12, 13 are abutted against the rear surface of the face shell 4, and a narrow gap 14 is formed between the pair of left and right reinforcing members 12, 13, so that the drop of the bead 15 can be reduced. Also, the formation of the bead 15 can be performed favorably.

As described above, in the above embodiment, the golf club in which the shaft 3 is connected to the head 1 composed of the face shell 4, the sole / side peripheral shell 7 having the sole portion 5 and the side peripheral portion 6, and the crown shell 8. In the club, reinforcing members 12, 13 are provided on a part of the front edge 8A of the crown shell 8, and the front edge 8A side of the crown shell 8 is reinforced in addition to the thickness A of the front edge 8A.
The upper edge 4A of the face shell 4 is formed by adding a thickness D
And the front edge 8A of the crown shell 8 are joined by welding, so that thermal deformation during welding can be prevented. In particular, the center of gravity (not shown) of the head 1 is lowered for expanding the sweet area,
Furthermore, the depth of the center of gravity, that is, the center of gravity of the head and the face shell 4
It is necessary to reduce the thickness of the crown shell 8 in order to increase the distance between the crown shell 8 and the crown shell 8 as described above. Thermal deformation during welding can be prevented.

Further, separate reinforcing members 12 and 13 are partially provided on the inner surface of the front edge 8A of the crown shell 8, and the front edge 8A side is formed thick to form the upper edge 4A of the face shell 4 and the crown. Shell 8
The front edge 8A of the crown shell 8 is joined by welding, so that the front edge 8A side of the crown shell 8 is reinforced in addition to the thickness A of the front edge 8A.
The thickness D is increased by adding the thickness D of 12, 13 to prevent thermal deformation during welding. In particular, by fixing the separate reinforcing members 12, 13 to the inner surface of the front edge 8A of the crown shell 8, for example, it is possible to use the end pieces formed when the shells 4, 7, 8 are formed, and to reinforce the shell. The members 12 and 13 are formed in a thin plate shape having a thickness D in advance so that the front edge 8 of the crown shell 8 can be formed.
The thickness on the A side can be a predetermined thickness (E + D). In addition, since the reinforcing members 12 and 13 are separate from the crown shell 8, they can be easily arranged at desired locations.
By arranging only along the front edge 8A of the crown shell 8, the reinforcing members 12, 13 can be minimized to achieve weighing, and the influence on the weight distribution of the head 1 can be minimized.

In addition, the front edges of the separate reinforcing members 12, 13
12A and 13A protrude from the front edge 8A of the crown shell 8 to form the front edge 8A side with a thickness (E + D).
The upper end 4A of the face shell 4 and the front edge 8A of the crown shell 8 are welded to each other by welding the front end of the shell 13A to the rear surface of the face shell 4 so that the rear surface of the face shell 4 and the crown shell 8 are joined together.
A narrow gap 14 having a predetermined interval can be formed with the leading edge 8A of the base material, and as a result, a good bead 15 can be formed.

Further, a plurality of projections 11 are provided on the front edge 8A of the crown shell 8, and the projections 11 are engaged with the upper edge 4A of the face shell 4, so that the upper edge 4A of the face shell 4 and the crown shell 8 are formed. Of the leading edge 8A by welding can prevent the leading edge 8A from dropping during welding.
A and the leading edge 8A can be joined as designed.

FIGS. 4 to 5 and FIGS. 6 and 7 show a second embodiment and a third embodiment, in which the same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted. I do. In the second embodiment, a reinforcing member 21 is integrally fixed inside the front edge 8A of the crown shell 8 along the front edge 8A. This reinforcement member
Reference numeral 21 denotes the entire front edge 8A, that is, the front edge 8A is continuously disposed on both sides of the front edge 8A.
Is a thin plate shape having a thickness substantially equal to the thickness of, for example, about 1 mm, and is formed to have a width of about 5 mm along the front edge 8A. In the embodiment, the front edge 8A is integrally provided on both sides by spot welding or the like. The front edge 21A of the reinforcing member 21 projects from the front edge 8A. The protruding length of the reinforcing member 21 is formed smaller than the protruding length of the protruding portion 11, for example, about 1 mm.

Therefore, in welding the upper edge 4A of the face shell 4 and the front edge 8A of the crown shell 8, first, the reinforcing member
Abutting the tip of the front edge 21A of 21 on the rear surface of the face shell 4,
Further, the projection 11 is locked so as to be placed on the upper edge 8A of the face shell 4. The welding is performed by placing a bead 15 between the upper edge 4A of the face shell 4 and the front edge 8A of the crown shell 8. Even if the front edge 8A side of the crown shell 8 is to be thermally deformed by welding heat during such welding, the front edge 8A is reinforced by the reinforcing member 21 and the protrusion 11 is attached to the upper edge 8A of the face shell 4. Since it is placed, the front edge 8A does not fall into the inside of the head 1, and the upper edge 4A of the face shell 4 and the front edge 8 of the crown shell 8 do not fall.
A can be welded.

As described above, in the above embodiment, the golf club in which the shaft 3 is connected to the head 1 composed of the face shell 4, the sole / side peripheral shell 7 having the sole portion 5 and the side peripheral portion 6, and the crown shell 8 is formed. In the club, a reinforcing member 21 is provided on the entire front edge 8A of the crown shell 8, and the front edge 8A of the crown shell 8 is provided.
A side is formed by adding the thickness of the reinforcing member 21 in addition to the thickness of the front edge 8A and joining by welding, so that the first side is formed.
As in the case of the embodiment, there is an effect that thermal deformation at the time of welding can be prevented. In particular, since the reinforcing member 21 is provided along the entire front edge 8A, it is possible to reinforce the entire front edge 8A.

In the third embodiment, a built-up portion 31 is integrally provided inside the front edge 8A of the crown shell 8 only along the front edge 8A. The build-up portion 31 is provided by embedding beads by welding along a part or the entirety of the front edge 8A, and the thickness thereof is substantially the same as the thickness of the front edge 8A, for example, about 1 mm, Its width is formed to be about 5 mm, and it is along the front edge 8A.

Therefore, in welding the upper edge 4A of the face shell 4 and the front edge 8A of the crown shell 8, first, the upper edge 4A of the face shell 4 and the front edge 8A of the crown shell 8 are abutted.
The welding is performed by placing the bead 15 between the upper edge 4A and the front edge 8A. Even if the front edge 8A side of the crown shell 8 is to be thermally deformed by welding heat during such welding, the front edge 8A is reinforced by the built-up portion 31 provided in advance.

As described above, in the above-described embodiment, the golf club in which the shaft 3 is connected to the head 1 consisting of the face shell 4, the sole / side peripheral shell 7 having the sole portion 5 and the side peripheral portion 6, and the crown shell 8 is provided. In the club, a built-up portion 31 is provided on a part or the entirety of the front edge 8A of the crown shell 8, and the crown shell 8 is provided.
Is formed by adding the thickness of the built-up portion 31 to the thickness of the front edge 8A in addition to the thickness of the front edge 8A and joining by welding, so that thermal deformation during welding is reduced in the same manner as in the first embodiment. It has effects such as prevention.

The overlaid portion 31 is provided at the front edge 8 of the crown shell 8.
By arranging only along the line A, there is no need to arrange the overlaid portion 31 at an extra portion, and the overlaid portion 31 is minimized to achieve weighing and minimize the influence on the weight distribution of the head 1. Limit.

In addition, the thickened portion 31 is provided by welding to increase the thickness of the front edge 8A side of the crown shell 8, so that
For example, by providing a built-up portion 31 along the front edge 8A of the crown shell 8 as a pre-processing process for welding the face shell 4 and the crown shell 8, it is only necessary to increase the number of steps of the built-up portion 31 in the welding process. It can be easily placed at a desired location and manufactured.

The present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the present invention. For example, in the embodiment, the case where the face shell and the crown shell are joined has been described, but a welding portion of another shell may be used.

[0035]

According to a first aspect of the present invention, there is provided a golf club in which a shaft is connected to a head having a plurality of divided shells.
A golf club, characterized in that at least one of the peripheral edges of the divided shells to be joined is entirely or partially formed with a thick wall, and the wall thickness has an accurate shape against thermal deformation during welding due to the thickness. Can be formed.

According to a second aspect of the present invention, in a golf club in which a shaft is connected to a head made of a plurality of divided shells, at least one peripheral inner surface of the joined divided shells has
A golf club characterized in that a separate reinforcing member is provided on all or a part of the golf club and is formed thick, and the reinforcing member can resist thermal deformation during welding.

According to a third aspect of the present invention, in a golf club in which a shaft is connected to a head composed of a plurality of divided shells, at least one peripheral inner surface of the joined divided shells has
A golf club characterized in that a separate reinforcing member is provided in whole or in part so as to protrude from an end of a split shell, and is formed to have a large thickness, and the reinforcing member resists thermal deformation during welding. In addition, the reinforcing member can be easily arranged at a desired position, and the divided shells can be arranged at a predetermined interval.

According to a fourth aspect of the present invention, in a golf club in which a shaft is connected to a head composed of a plurality of split shells, a plurality of projections are provided at at least one end of the split shells to be joined, and the projections are A golf club characterized by being locked to an end of the other split shell, wherein one split shell can be joined to the other split shell without dropping.

According to a fifth aspect of the present invention, in a golf club in which a shaft is connected to a head including a plurality of divided shells, at least one peripheral inner surface of the divided shells to be joined has
A golf club characterized in that a built-up portion is provided on all or a part of the golf club. The built-up portion can withstand thermal deformation during welding, and the built-up portion can be easily arranged at a desired position. Can be.

[Brief description of the drawings]

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

FIG. 2 is a sectional view showing a first embodiment of the present invention.

FIG. 3 is a bottom view of the crown shell showing the first embodiment of the present invention.

FIG. 4 is an exploded perspective view showing a second embodiment of the present invention.

FIG. 5 is a bottom view of a crown shell showing a second embodiment of the present invention.

FIG. 6 is an exploded perspective view showing a third embodiment of the present invention.

FIG. 7 is a sectional view showing a third embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Head 3 Shaft 4 Face shell 4A Upper edge (other peripheral part) 7 Sole / side peripheral shell 8 Crown shell 8A Front edge (one peripheral part) 11 Projection part 12,13 Reinforcement member 12A, 13A Front edge

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Akira Katahira 5-36-11, Shimbashi, Minato-ku, Tokyo Inside Yokohama Rubber Co., Ltd. F-term (reference) 2C002 AA02 CH04 CH05 CH06 MM04 PP03 SS04

Claims (5)

[Claims] 1. A golf club in which a shaft is connected to a head composed of a plurality of divided shells, wherein at least one or all of the divided shells to be joined are formed to be thick. . 2. A golf club in which a shaft is connected to a head composed of a plurality of divided shells, wherein a separate reinforcing member is entirely or partially provided on the inner surface of at least one peripheral edge of the divided shells to be joined. A golf club characterized by being formed thick. 3. A golf club in which a shaft is connected to a head composed of a plurality of divided shells, wherein a separate reinforcing member is entirely or partially provided on at least one peripheral inner surface of the divided shells to be joined. A golf club characterized in that it is provided so as to protrude from an end portion and is formed thick. 4. In a golf club in which a shaft is connected to a head composed of a plurality of divided shells, a plurality of protrusions are provided at at least one end of the divided shells to be joined, and the protrusions are connected to the other divided shell. A golf club which is locked to an end. 5. A golf club in which a shaft is connected to a head composed of a plurality of divided shells, wherein a built-up portion is provided on all or a part of the inner surface of at least one peripheral edge of the divided shells to be joined. And golf clubs.