JP2000262654A - Golf ball - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the balance of a head by forming a shaft insertion hole in the sole part of the head and mounting a shaft receiving pipe which is inserted with a shaft and is molded as a separate body from the head between this shaft insertion hole and the shaft insertion hole of a top part. SOLUTION: The head 33 of the golf club 31 consists of three component parts; the top part 35, a face part and a bottom part integrally molded with the sole part 39 and side parts. The shaft insertion hole 45 is opened on the heel side of the top part 35 from the apex of the top part 35 and the shaft insertion hole 47 is opened on the heel side of the sole part 39 in correspondence to the shaft insertion hole 45. Both ends 49a and 49b of the shaft receiving pipe 49 are respectively inserted and supported into the shaft insertion holes 45 and 47 in the head 33. The shaft receiving pipe 49 is welded to the inner peripheral surfaces of these shaft insertion holes 45 and 47 and both ends 49a and 49b thereof are respectively made flush with the outside surfaces of the top part 35 and the sole part 39.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a golf club, and more particularly, to a golf club which secures a sufficient mounting strength of a shaft to a head and improves the balance of the head.

[0002]

2. Description of the Related Art Conventionally, a head of a golf club called a wood has a hosel portion for inserting a shaft on a heel side of the head, and the hosel portion is protruded upward. By securing the margin, sufficient mounting strength of the shaft to the head was ensured.

However, in the conventional head having such a hosel portion, the position of the center of gravity of the head is high and the position of the center of gravity is closer to the heel, so that the sweet spot is shifted toward the heel. was there.

Therefore, recently, a head without such a hosel portion projecting upward has been disclosed in Japanese Patent Laid-Open No. 10-295857.
And JP-A-6-225949. As shown in FIG.
The head 1 disclosed in Japanese Patent Application Laid-Open Publication No. H11-163873 has a heel side of a head body 3 made of a hollow outer shell formed of a metal material such as a titanium alloy or stainless steel.
A cylindrical portion 9 having a substantially cylindrical shape is integrally formed, and the upper end of the cylindrical portion 9 is disposed below the surface of the top portion 5. A shaft is inserted into the shaft insertion hole 11 of the cylindrical portion 9. 1
3 is inserted, and its insertion-side tip 13a is flush with the outer surface of the sole portion 7.

On the other hand, the latter head disclosed in Japanese Patent Application Laid-Open No. 6-225949 has a head body 15 made of a hollow outer shell formed of a metal material such as stainless steel as shown in FIGS. On the heel side, a shaft receiving pipe 17 whose upper end portion 17a is flush with the outer surface of the top portion 19 and whose lower end portion 17b is joined to the inner surface of the sole portion 21 is attached.

According to these heads 1 and 23, since there is no hosel portion protruding upward on the heel side of the head bodies 3 and 15, the head is compared with a conventional head provided with such a hosel portion. It is possible to lower the center of gravity by 1, 23.

[0007]

However, in the head 1 shown in FIG. 11, since the head body 3 and the tubular portion 9 are integrally formed, the tubular portion 9 and the heel wall of the head body 3 are not shown in the drawing. A gap is shown in the figure (part A in the figure), but in an actual molded article such as casting, the head body 3
It has been pointed out that the molding material accumulates and the tubular portion 6 and the heel wall are integrated, and as a result, the heel side becomes heavy and the balance of the head 1 becomes poor.

A golf club head 2 shown in FIG.
3, the lower end portion 17b of the shaft receiving pipe 17
When the shaft 25 is inserted into the shaft receiving pipe 17 as shown in FIG. 14 due to the structure joined to the inner surface of the sole portion 21, the heel side of the insertion-side tip portion 25 a of the shaft 25 is connected to the inner surface 21 a of the sole portion 21. Since the shaft 25 can be inserted only up to the point where the shaft 25 comes into contact, the adhesion area of the shaft 25 cannot be sufficiently secured.

The present invention has been devised in view of the above circumstances, and has as its object to provide a golf club in which a sufficient mounting strength of a shaft to a head is ensured and the balance of the head is improved. .

[0010]

In order to achieve the above object, according to the first aspect of the present invention, a shaft insertion hole is provided on a heel side of a head made of a hollow outer shell at a top portion of a top portion of the head. In a golf club formed below and having a shaft inserted in the shaft insertion hole, a shaft insertion hole is formed in a sole portion of the head, and a shaft insertion between the shaft insertion hole and the top portion is performed. Between the hole, a shaft is inserted and a shaft receiving pipe molded separately from the head is mounted, and through the shaft receiving pipe, the insertion-side tip of the shaft is inserted to the shaft insertion hole of the sole part. It is characterized by being fixed.

The invention according to claim 2 is based on claim 1
In the golf club described above, the shaft receiving pipe is inserted into a shaft insertion hole provided in the top portion and the sole portion, and the invention according to claim 3 is claim 1 or claim 2. 2. The golf club according to item 2, wherein at least a face portion of the head is made of a plastically processed material.

(Operation) According to the invention of each claim, the shaft is mounted on the inner periphery of the shaft receiving pipe mounted between the shaft insertion hole on the top portion side and the shaft insertion hole on the sole portion side. Since the joint is formed from the portion to the sole portion, the shaft is securely attached to the head via the shaft receiving pipe.

Further, the shaft is inserted on the heel side of the head via the shaft receiving pipe, and since the shaft is inserted into the shaft receiving pipe, the thickness of the shaft receiving pipe itself may be reduced. As a result, the weight of the heel side of the head is reduced as compared with the related art. According to the second aspect of the invention, since the shaft receiving pipe is inserted between the shaft insertion hole on the top portion side and the shaft insertion hole on the sole portion side, the mounting strength of the shaft is further increased. According to the third aspect of the present invention,
By forming the face portion by plastic working, the resilience and strength of the face portion are improved.

[0014]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIGS. 1 to 5 show a first embodiment of claims 1 to 3, and as shown in FIGS. 1 and 2, the head 33 of the golf club 31 according to this embodiment
Top part 35, face part 37, and sole part 39
And a side portion 41 are formed of a hollow outer shell formed by welding three components of a bottom portion 43 integrally formed. As shown in FIG. A shaft insertion hole 45 is opened below the top (the highest portion of the top portion 35 when the head 33 is addressed), and as shown in FIG.
Shaft insertion hole 4 on the heel side of sole portion 39 corresponding to
7 is open.

The top portion 35 and the face portion 3
7 and the bottom portion 43 are formed by cutting a titanium alloy rolled plate or the like into a required shape and size in accordance with each component, or at the same time, pressing these with a mold corresponding to each component. Although these are formed, they may be formed by forging. 3, both ends 49a and 49b of a shaft receiving pipe 49 formed of a titanium alloy and having a thickness of 1.5 mm or less are inserted into the shaft insertion holes 45 and 47, respectively, as shown in FIG. The shaft receiving pipe 49 is inserted and supported between the shaft insertion holes 45 and 47.
5 is welded to the inner peripheral surface of the shaft insertion hole 47 of the sole portion 39, and the upper end portion 49a and the lower end portion 49b are flush with the outer surfaces of the top portion 35 and the sole portion 39, respectively. .

The shaft receiving pipe 49 is formed by casting a plate material into a tube, cutting a bar into a tube by cutting, or by molding. However, the shaft receiving pipe 49 is formed separately from the head 33.
High accuracy and light weight. Then, the shaft 51 is inserted into and adhered to the shaft receiving pipe 49 to form the golf club 31 according to the present embodiment. As shown in FIG. The shaft 5 which is flush with the outer surface of the sole portion 39 and opens in the sole portion 39
1 has a structure in which a resin stopper 53 is mounted in the insertion-side distal end portion 51a.
It is sufficient that at least a part of the shaft 1a reaches the shaft insertion hole 47 of the sole portion 39, and the shaft 51a is not necessarily required.
The insertion-side distal end portion 51a may not be flush with the outer surface of the sole portion 39.

Further, in order to increase the joint area of the shaft 51 by lengthening the shaft receiving pipe 49, as shown in FIG. The sole portion 39 has a slightly flat shape with a small round in the toe and heel directions so that the distance h between the center axis P of the shaft 51 and the intersection between the sole portion 39 is 7 mm or less.

FIG. 4 is a front view of the golf club 31 according to the present embodiment, and FIG. 5 is a sectional view taken along line VV of FIG. Thus, the golf club 31 according to the present embodiment is
Because the shaft receiving pipe 49 was inserted between the shaft insertion hole 45 and the shaft insertion hole 47, and the shaft 51 was joined to the inner periphery of the shaft receiving pipe 49 from the top portion 35 to the sole portion 39. The shaft 51 is securely attached to the head 33 via the shaft receiving pipe 49.

A shaft 51 is inserted into the heel side of the head 33 via a thin shaft receiving pipe 49,
Also, since the shaft 51 is inserted into the shaft receiving pipe 49, the thickness of the shaft receiving pipe 49 itself can be reduced.
3, the heel side is lightened. The shaft receiving pipe 49 may have a shape other than the cylindrical shape. When the heel side or the face side is thinner than the back side or the toe side, the head balance can be further improved.

Since the effective length of the flexible shaft 51 is ensured as compared with a conventional golf club having a hosel portion protruding from the heel side of the head, the shaft 51
The head 33 is easily returned by making full use of the bending on the tip side of the ball, and the hit ball is easily raised. Therefore, according to the present embodiment, the mounting strength of the shaft 51 to the head 33 can be improved as compared with the conventional example shown in FIG. 12, and the shaft receiving pipe 49 and the heel side and the face side of the head 33 are separated from each other. Since there is no head constituent member interposed between the two, the heel side of the head 33 into which the shaft 51 is inserted can be reduced in weight as compared with the conventional example shown in FIG. 11, and the balance of the head 33 can be kept good. It has become possible.

As described above, in this embodiment, the shaft receiving pipe 49 is inserted into the shaft insertion holes 45 and 47, and the shaft receiving pipe 49 extends from the top portion 35 to the sole portion 39. Since the shaft 51 is joined, the shaft receiving pipe 49 at the time of hitting the ball is used.
The load on itself is reduced, and as a result, the weight of the shaft receiving pipe 49 can be reduced by making it thinner, for example, the peripheral weight can be distributed. As a result, the joint between the shaft receiving pipe 49 and the sole portion 39 can be increased in strength or welded as compared with the conventional example of FIG. It has advantages such as reduction in weight.

In addition, in this embodiment, since the shaft receiving pipe 49 and the face portion 37 are formed as separate structures and the face portion 37 and the top portion 35 are formed by plastic working, the resilience and strength of the face portion 37 are reduced. In addition to being able to improve the thickness, the thickness can be reduced to a thickness of 3 mm or less and the weight can be reduced, so that the balance of the head 33 is improved.

FIGS. 6 and 7 show a golf club according to a second embodiment of the present invention. As shown in FIG. 7, this embodiment employs a shaft provided on a top portion 35 and a sole portion 39. A flange 55 slightly protruding outward is provided on the upper part of the shaft receiving pipe 49-1 to be inserted into the insertion holes 45 and 47 so as to be continuous with the outer surface of the head 33-1. A stopper (projection) 57 is provided at the lower portion of the shaft receiving pipe 49-1 for abutting on the inner surface of the shaft 39 to position the shaft receiving pipe 49-1. Are joined from the top part 35 to the sole part 39.

The upper end of the shaft receiving pipe 49-1 is
The head 33-1 protrudes slightly upward from the head 33-1 so as not to exceed the top of the top portion 35. And
Other configurations are the same as those of the first embodiment, and thus the same components are denoted by the same reference numerals and description thereof will be omitted. The golf club 31-1 according to the present embodiment is configured as described above, and according to the present embodiment, similarly to the first embodiment, the intended purpose can be achieved.

Further, as described above, in the present embodiment, the stopper 57 for positioning the shaft receiving pipe 49-1 is provided below the shaft receiving pipe 49-1. The stopper 57 and the flange 55
Is advantageous in that a wider welding area of the shaft receiving pipe 49-1 can be secured.

FIGS. 8 and 9 show a golf club according to the third embodiment of the present invention. As shown in FIG. An annular flange 59 projecting toward the shaft insertion hole 4 is provided.
5-1 is formed, and a shaft receiving pipe 49-2 is inserted between the protruding end of the annular flange 59 and the shaft insertion hole 47 of the sole portion 39, and the shaft receiving pipe 49-2 is formed. The shaft 51 is joined to the inner periphery from the top portion 35 to the sole portion 39.

Thus, the golf club 3 according to the present embodiment
According to 1-2, in addition to the same operation and effect as the first embodiment, a gap is provided between the inner peripheral surface and the shaft 51 in the shaft insertion hole 45-1 as shown in FIG. Since the effective length of the shaft 51, which can be increased by the length L, can be extended, the head 33-2 can be easily returned by further utilizing the bending of the distal end side of the shaft 51, and the hit ball can be raised higher. Having.

As described above, in the embodiment shown in FIG. 1, the shaft receiving pipe 49 is inserted between the shaft insertion hole 45 and the shaft insertion hole 47, and Shaft 51 around top 35
From the bottom to the sole portion 39, but as in the embodiment according to claim 1 and claim 3 shown in FIG. 10, the shaft receiving pipe 49 is inserted into the shaft insertion hole 45, and the lower end portion 49b is attached. The inner surface of the sole portion 39 is joined by welding or the like, and the shaft 51 is joined to the inner periphery of the shaft receiving pipe 49.
May be inserted into the shaft insertion hole 47-1 of the head.
The connection is strengthened by being supported by the sole portion 39 of 3-3.

Although not shown, the upper end and the lower end of the shaft receiving pipe are joined to the inner surfaces of the top part and the sole part, respectively, and the shaft is joined directly to the inner periphery of the shaft receiving pipe. You may make it insert in the shaft insertion hole of a top part and a sole part.

Thus, according to these embodiments, the mounting strength of the shaft 51 to the head 33-3 can be improved as compared with the conventional example shown in FIG.
Head 3 for inserting shaft 51 as compared with the conventional example shown in FIG.
Since the heel side of 3-3 can be reduced in weight, it is possible to maintain a good balance of the head 33-3. The material of the head and the shaft receiving pipe in the present invention is not limited to a titanium alloy, but may be a metal material such as stainless steel, aluminum, or titanium. The shaft receiving pipe is preferably made of a metal material which is the same as or lighter than the head in order to reduce the weight of the heel side.

[0031]

As described above, according to the present invention, the mounting strength of the shaft with respect to the head can be improved as compared with the related art, and the heel side of the head into which the shaft is inserted can be reduced in weight. Therefore, it is possible to maintain a good head balance.

According to the second aspect of the present invention, the shaft receiving pipe is inserted into the shaft insertion hole, and the shaft is inserted into the shaft receiving pipe from the top portion to the sole portion. As a result, the load on the shaft receiving pipe itself at the time of hitting is reduced, and as a result, the weight can be reduced by reducing the thickness of the shaft receiving pipe, thereby increasing the degree of freedom in design, for example, by distributing the peripheral weight. In addition, as a result of inserting the lower end portion of the shaft receiving pipe into the shaft insertion hole, there is an advantage that the strength of the joint between the shaft receiving pipe and the sole portion can be increased, or the weight including the weld bead can be reduced.

According to the third aspect of the present invention, there is an advantage that the resilience and strength of the face portion can be improved by forming the face portion by plastic working.

[Brief description of the drawings]

FIG. 1 is a perspective view of a golf club according to a first embodiment of the present invention.

FIG. 2 is an exploded perspective view of the head of the golf club shown in FIG.

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

FIG. 4 is a front view of the golf club shown in FIG.

FIG. 5 is a sectional view taken along line VV of FIG. 4;

FIG. 6 is a front view of a golf club according to a second embodiment of the present invention.

7 is a cross-sectional view of the golf club shown in FIG.

FIG. 8 is a front view of a golf club according to a third embodiment of the present invention.

9 is a cross-sectional view of the golf club shown in FIG.

FIG. 10 is a sectional view of a golf club according to an embodiment of the present invention.

FIG. 11 is a cross-sectional view of a conventional golf club.

FIG. 12 is a perspective view of another conventional golf club head.

13 is a perspective view showing the internal structure of the golf club head shown in FIG.

14 is a cross-sectional view of a main part of the golf club head shown in FIG.

[Explanation of symbols]

 31, 31-1, 31-2 Golf club 33, 33-1, 33-2, 33-3 Head 35 Top 39 Sole 43 Bottom 45, 45-1, 47, 47-1 Shaft insertion hole 49 , 49-1,49-2 Shaft receiving pipe 51 Shaft 55 Flange 57 Stopper 59 Annular flange

Claims (3)

[Claims] 1. A golf club in which a shaft insertion hole is formed below the top of a top portion of the head on the heel side of a head made of a hollow outer shell, and a shaft is inserted into the shaft insertion hole. A shaft receiving hole is formed in a sole portion of the head, and a shaft receiving member having a shaft inserted and formed separately from the head between the shaft receiving hole and the shaft receiving hole of the top portion. A golf club, wherein a pipe is mounted, and an insertion-side tip of a shaft is inserted into a shaft insertion hole of a sole portion and fixed via the shaft receiving pipe. 2. The golf club according to claim 1, wherein the shaft receiving pipe is inserted into a shaft insertion hole provided in the top portion and the sole portion. 3. The golf club according to claim 1, wherein at least a face portion of the head is made of a plastically processed material.