JP3683488B2 - Golf club and manufacturing method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a golf club called a metal wood made of a metal outer shell and the like and a method for manufacturing the same .
[0002]
[Prior art]
Conventional so-called metal wood is a golf club head body in which a plurality of metal shell pieces are integrally joined, and a face surface member is welded. In some cases, the main body side of the golf club head is integrally formed by plastic working or casting, and a face surface member is joined to the front opening. In these golf club heads, as disclosed in Japanese Patent Laid-Open Nos. 7-8580 and 9-84905, in order to form a golf club head that is lightweight and has a higher repulsive force and higher strength, A club head filled with high-pressure gas has been proposed. In these golf club heads, gas injection ports are formed in the sole portion and the back surface portion of the head main body, and a predetermined high-pressure gas is injected and sealed.
[0003]
[Problems to be solved by the invention]
In the case of the above-described conventional technology, the sole portion and the back portion of the golf club head are thin, and the gas inlet cannot be firmly attached. Further, the impact at the time of hitting may cause the metal member at the gas inlet to come off or the surrounding metal shell to be deformed. Therefore, the strength of the injection port is weak, and the pressure inside the golf club head cannot be increased to such an extent that the shot feeling is improved.
[0004]
The present invention has been made in view of the above-described problems of the prior art, and has a good feel at impact, a high strength, and a golf club having a metal golf club head capable of extending a flight distance. And its manufacturing method .
[0005]
[Means for Solving the Problems]
The present invention provides a metal face surface member, a metal head main body that is located behind the face surface member and that is hollow and has an open face surface mounting portion, and a shaft mounting pipe that is provided on the head main body. The golf club head is hermetically sealed, a high pressure gas is injected into the golf club head to form a high pressure state, and the thickness of the face surface member is 1.2 mm to 1. mm. The golf club is formed to 9 mm, preferably 1.6 mm to 1.8 mm, and supports the impact applied to the face member by the high-pressure gas.
[0006]
Further , the shaft mounting pipe of the golf club head is formed in a hollow cylindrical shape, and has an open cylindrical portion into which the shaft is inserted in the upper portion, and the shaft mounting pipe communicates from the open cylindrical portion. A check valve provided in the inside of the golf club head and a through hole provided in the lower end portion of the shaft mounting pipe in communication with the check valve. This golf club is formed by injecting the above gas into a high pressure state in the golf club head. The check valve is screwed into the shaft mounting pipe, and an opening cylinder portion of the shaft mounting pipe to which the shaft is mounted is filled with sealing resin on the outside of the check valve. Further, the check valve is sealed by attaching the shaft to the opening cylinder. The head main body and the face surface member are made of, for example, various types of β-type titanium.
[0007]
The present invention also provides a metal face surface member having a thickness of 1.2 mm to 1.9 mm, and a metal head that is located behind the face surface member and has a hollow face surface attachment portion. A golf club head including a main body and a shaft mounting pipe provided on the head main body is provided, and the shaft mounting pipe is welded to a sole portion of the head main body and a shaft mounting pipe holding position. Welding is also performed on the upper surface of the main body, and the face surface member is welded to the face surface mounting portion of the head main body, and then a check valve is inserted into the shaft mounting pipe and screwed. High pressure gas is injected through the shaft mounting pipe and check valve into the golf club head to form a high pressure state, and the shaft is mounted. On the outside of the open cylindrical portion of the check valve of the shaft mounting pipe which is, by filling a resin for sealing is a golf club manufacturing method characterized by fixed through the shaft.
[0008]
In the golf club head of the present invention, a high-pressure gas is filled in the head main body, and the strength of the head main body is increased by this high-pressure gas. Therefore, even if the face member is formed thin, it can withstand the impact of the hit ball. A stronger repulsive force can be obtained.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. The golf club of this embodiment includes a face surface member 10 for hitting a ball and a hollow head body 12. The face surface member 10 has a plurality of shallow grooves 10a formed on the front and back surfaces thereof to increase the strength. The head main body 12 includes a substantially flat and curved upper surface portion 20 and a side peripheral bottom surface portion 22 in which a sole portion and a side peripheral portion are integrally formed, and a joint portion between the upper surface portion 20 and the side peripheral bottom surface portion 22 is formed. It is formed by welding. The front opening of the head body 12 in which the upper surface portion 20 and the side circumferential bottom surface portion 22 are integrally formed serves as a face surface attachment portion 14 that fixes the face surface member 10.
[0010]
A shaft mounting pipe 24 is integrally welded to the head body 12. As shown in the drawing, the lower end 24 a of the shaft mounting pipe 24 is welded to the inner surface of the sole portion of the side peripheral bottom surface portion 22, and the upper portion 24 b is connected to the upper surface portion 20 of the head body 12 and the side peripheral bottom surface portion 22. It is welded to the pipe holding position 23. The shaft mounting pipe 24 is formed by hollowing out a titanium rod, is formed in a hollow cylindrical shape, and has an opening cylinder portion 30 into which the shaft 26 is inserted from the upper portion 24b to the upper end portion. A threaded portion of the check valve mounting portion 32 is formed on the lower end portion side that communicates with the cylindrical portion 30. Further, a through hole 34 is formed in the lower end portion 24 a of the shaft mounting pipe 24 so as to communicate with the check valve mounting portion 32. The shaft mounting pipe 24 is fitted with a check valve 36 to a check valve mounting portion 32 and further bonded to form a golf club head.
[0011]
The face surface member 10 is made of various types of β-type titanium because it is required to have a high strength capable of withstanding an impact at the time of hitting a ball. In the case of β-type titanium or a metal material having the same strength, the thickness of the face surface member is 1.2 mm to 1.9 mm, preferably 1.6 mm to 1.8 mm. The head main body 12 is also lightweight and requires high strength, and since it receives an impact at the time of hitting, it is made of various types of β-type titanium. The shaft mounting pipe 24 is made of α-type titanium (pure titanium) that is relatively soft and easy to process. As the β-type titanium alloy, Ti-22V-4Al alloy is preferable, and Ti-13V-11Cr-3Al alloy, Ti-11.5Mo-6Zr-4.5Sn alloy, Ti-15Mo-3Cr-3Sn-3Al, etc. may be used. Other titanium alloys may be used, and can be appropriately adopted according to the performance.
[0012]
In this method of manufacturing a golf club head, first, the face surface member 10 is processed by forging or other press work in a cold or hot state, and is plastically deformed to form a predetermined shape. As the pressing method, an appropriate method that is easy to process may be selected. Further, the upper surface portion 20 and the side circumferential bottom surface portion 22 are each formed into a predetermined shape by pressing with hot or cold forging. Thereafter, the shaft mounting pipe 24 is welded to the sole portion of the side peripheral bottom surface portion 22 and the shaft mounting pipe holding position 23, the upper surface portion 20 is welded to the side peripheral bottom surface portion 22, and the upper portion of the shaft mounting pipe 24 is Also welded to 24b. Next, the center-of-gravity adjusting member 28 is welded into the side peripheral bottom surface portion 22, and the face surface member 10 is welded to the face surface mounting portion 14 of the head body 12. At this time, welding is performed in a state where the mounting angle of the shaft mounting pipe 24 and the angle between the face surface member 10 are accurately set by a jig (not shown). These weldings can be selected as appropriate, such as laser welding or electron beam welding.
[0013]
Next, the check valve 36 is attached to the check valve attachment portion 32 of the shaft attachment pipe 24. The check valve 32 is screwed into the shaft mounting pipe 24 in an airtight state. At this time, an adhesive may be applied to the screwed portion. Thereafter, an inert gas such as air, nitrogen, or argon is injected through the check valve 32 at a high pressure. The atmospheric pressure in the golf club head is, for example, 10 to 30 atm, preferably about 15 to 25 atm. Then, the shaft 26 is inserted into the shaft mounting pipe 24 and fixed with an adhesive or the like. After injecting the high-pressure gas, a predetermined amount of an airtight resin such as an adhesive may be filled in the opening cylinder portion 30 of the mounting portion of the check valve 36.
[0014]
In the golf club head of this embodiment, since the high pressure gas is filled in the golf club head and is in a high pressure state, the thickness of the face surface member 10 is reduced to about 1.2 mm to 1.9 mm, which is about half of the conventional thickness. The thickness may preferably be about 1.6 mm to 1.8 mm. As a result, the flexibility of the face surface member 10 is increased, strength and durability are ensured by the internal high-pressure gas, and repulsion at the time of hitting the ball becomes stronger. In addition, the face member 10 can be lightened, the head itself can be lightened, and the depth of the center of gravity can be increased. Further, the high-pressure gas is injected through the check valve 36 in the shaft mounting pipe 24, so that the mounting strength is high and reliable sealing is possible.
[0015]
The golf club head of the present invention is not limited to the above embodiment, and the head body is integrally formed of titanium, titanium alloy, duralumin, or other light alloy, or the face surface member and the shaft mounting pipe. The present invention can be applied to a golf club head having an appropriate structure, such as a portion provided integrally. Further, a golf club head by casting may be used in addition to press molding such as forging.
[0016]
【The invention's effect】
The golf club head of the present invention is filled with high-pressure gas and satisfies the conflicting requirements of flexibility and high strength of the face surface member at a high level. As a result, the golf ball can be accurately thrown away and the weight can be reduced. In addition, since the check valve is provided in the shaft mounting pipe, the check valve has a high mounting strength and can ensure airtightness reliably.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of an embodiment of a golf club head according to the present invention.
FIG. 2 is an exploded perspective view of an embodiment of a golf club head according to the present invention.
FIG. 3 is a perspective view of the golf club head of this embodiment.
FIG. 4 is a longitudinal sectional view of a shaft mounting pipe of the golf club head of this embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Face surface member 12 Head main body 14 Face surface attachment part 20 Upper surface part 22 Side peripheral bottom face part 24 Shaft attachment pipe 30 Open cylinder part 34 Through-hole 36 Check valve

Claims (2)

A metal face surface member having a thickness of 1.2 mm to 1.9 mm, a metal head body that is located behind the face surface member and is hollow and has an open face surface attachment portion, and the head A golf club head having a shaft mounting pipe provided on the main body, the shaft mounting pipe being formed in a hollow cylindrical shape, and having an open cylindrical portion into which the shaft is inserted in an upper portion. A check valve provided in the shaft mounting pipe in communication with the opening cylinder, and a through hole provided in the lower end side of the shaft mounting pipe in communication with the check valve; the check valve is screwed into the shaft mounting pipe, a via the check valve in the golf club head by injecting high pressure gas within the golf club head is formed on the high-pressure state, the shaft attachment Above the opening tube portion of the shaft mounting pipe, a golf club, characterized in that the shaft is filled resin for sealing the outside of the check valve is inserted and fixed to. A metal face surface member having a thickness of 1.2 mm to 1.9 mm, a metal head body that is located behind the face surface member and is hollow and has an open face surface attachment portion, and the head A golf club head having a shaft mounting pipe provided on the main body is provided, and the shaft mounting pipe is welded to a sole portion of the head main body and a shaft mounting pipe holding position, and on the upper surface of the head main body. And welding the face surface member to the face surface mounting portion of the head body, and then inserting a check valve into the shaft mounting pipe and screwing it, and mounting the shaft in the golf club head. High pressure gas is injected through a pipe and a check valve to form a high pressure inside the golf club head, and the shaft to which the shaft is attached is formed. Outside the check valve of the open cylindrical portion of the preparative mounting pipe, a manufacturing method of the golf club is filled with a resin for sealing, characterized in that fixed through the shaft.

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