JPH0218861B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to fiber-reinforced plastics (hereinafter referred to as
This invention relates to an improvement in the head structure of a wood golf club having an outer shell made of (abbreviated as FRP).

[Prior Art] A wood club for golf usually has a head body made of wood such as persimmon (persimmon tree) or maple and processed into a desired shape.

A face plate made of ABS resin or the like is placed in the sweet spot of the face of the head body to improve the repulsion characteristics against the ball when hitting the ball, and the sole and back parts are made of lead. Alternatively, a mass body as a weight member made of a metal material such as brass is embedded to increase the inertia, thereby increasing the flight distance of the ball.

However, in this type of conventional so-called wooden club head made of wood, the quality has inevitably deteriorated due to the soaring cost of materials due to the difficulty in obtaining raw wood, and the increasing sophistication of processing technology due to the complexity of the shape.

Therefore, in view of the above-mentioned drawbacks of the wooden wooden club head, the outer shell of the head body was made of FRP and the core was filled with foamed synthetic resin, as disclosed in Japanese Patent Publication No. 51-21436. There are some that have the following configuration.

[Problems to be Solved by the Invention] However, in the case of the above-mentioned so-called FRP wood club head, since an impact of 5,000 to 10,000 kg acts on the face part of the head body when hitting a ball, the face part , the FRP outer shell of the top and sole parts is easily deformed and vibrates.

As a result, a part of the energy of the ball is absorbed by the vibrations of the FRP outer shell and is lost, resulting in a reduction in the ball's repulsion characteristics and poor flight distance.

[Object of the Invention] An object of the present invention is to provide a wood club for golf that is capable of preventing deformation of the face portion when hitting a ball, improving repulsion characteristics against the ball, and increasing the rigidity of the entire head. The aim is to provide a head.

[Means for achieving the object] In order to achieve the above-mentioned object, this invention:
It has a structure in which a plurality of ribs are integrally protruded inside the head body made of an FRP outer shell and connect the FRP outer shell of the face part and the FRP outer shell of the back part. In this case, the upper and lower ribs protruding from the inner circumferential surface of the upper surface of the FRP outer shell and the inner circumferential surface of the sole are spaced apart from each other.

[Configuration of the Invention] Hereinafter, the configuration of the present invention will be explained in detail based on the drawings.

As shown in FIGS. 1 to 3, reference numeral 1 in the drawings is a head body of a golf wood club according to the present invention. This head body 1 is entirely made of FRP outer shell 2.
The core is either hollow or filled with a core material 3 made of foamed synthetic resin as shown in the figure.

The FRP outer shell 2 of the head body 1 is
The FRP outer shell 2a of the face part, the FRP outer shell 2b of the back part, the FRP outer shell 2c of the sole part, and the FRP outer shell 2c of the top part.
It is surrounded by an FRP outer shell 2d, and on its inner peripheral surface,
A plurality of ribs 4 are integrally provided to protrude in the direction toward the ball hitting direction X.

Each of these ribs 4 continuously connects the FRP outer shell 2a of the face part and the FRP outer shell 2b of the back part, and also connects the inner peripheral surface of the FRP outer shell 2c of the sole part. The lower rib 41 integrally protrudes from the upper part of the FRP outer shell 2d.
The upper rib 42 integrally protrudes from the inner circumferential surface of the upper rib 42 and is formed at a distance from the upper rib 42 .

Further, in the figure, 5 is a face plate made of hardened FRP embedded in the FRP outer shell 2a of the face portion of the head body 1, and 6 is a metal material such as lead or brass embedded in the FRP outer shell 2b of the back portion. 7 is a sole weight member fixed to the FRP outer shell 2c of the sole portion.

[Function] Therefore, according to the configuration of the present invention described above, inside the head body 1 made of the FRP outer shell 2,
A plurality of ribs 4 continuously connect the FRP outer shell 2a of the face part and the FRP outer shell 2b of the back part.
... are provided so as to protrude integrally with the FRP outer shell 2, thereby preventing the FRP outer shell 2a of the face portion from being elastically deformed by the impact of the ball when the ball is hit.

In addition, since the ribs 4 formed on the inner circumferential surface of the FRP outer shell 2 of the head body 1 are formed so as to be spaced apart from each other between the sole part and the upper surface part, the head outer shell can be easily molded. Moreover, the increase in the overall weight of the head is kept to a minimum, and the FRP outer shell 2d of the upper surface part of the head main body 1 and the FRP outer shell 2d of the sole part
The reinforcing effect of c is increased, and the rigidity of the entire head can be improved.

[Example] In this invention, the number of ribs 4 formed on the inner peripheral surface of the FRP outer shell 2 of the head main body 1 is determined by the size of the outer peripheral shape of the head depending on the count, the thickness and weight of the FRP outer shell, etc. Needless to say, it can be set arbitrarily.

[Effects of the Invention] As explained above, the present invention has a face portion on the inner circumferential surface of the FRP outer shell that constitutes the head main body.
It is easy to mold the head outer shell, which has integrally protruding ribs that continuously connect the FRP outer shell and the FRP outer shell of the back part, and the increase in the overall weight of the head is kept to a minimum. It's over.

In addition, since the integrally protruding ribs formed on the inner circumferential surface of the FRP outer shell of the head body are formed with a distance between the sole and the upper surface, the FRP outer shell of the upper surface of the head body is It is possible to increase the reinforcing effect of the FRP outer shell of the shell and sole portion, and it can be expected that the rigidity of the entire head will be improved.

Furthermore, this reinforcing structure of the head body prevents vibrations caused by elastic deformation of the FRP outer shell of the face, upper surface, and sole due to impact when hitting a ball, thereby reducing the loss of hitting energy. Therefore, it is possible to improve the repulsion characteristics against the ball, and it has excellent effects such as being able to increase the flight distance of the ball.

[Brief explanation of drawings]

FIG. 1 is an external view showing an embodiment of a wood club head for golf according to the present invention, FIG. 2 is a longitudinal side view taken along the line shown in FIG. 1, and FIG. 3 is a longitudinal sectional view taken along the line shown in FIG. FIG. 1...Head body, 2...FRP outer shell, 2a...
...FRP outer shell of the face part, 2b... of the back part
FRP outer shell, 2c... FRP outer shell of sole part, 2d
... FRP outer shell on the top surface, 4 ... Annular rib, 41
...Sole side rib, 42...Top side rib.

Claims (1)

[Scope of Claims] 1. In a golf wood club head made of an FRP outer shell, at least the space between the FRP outer shell of the face portion and the FRP outer shell of the back portion is integrally formed with the inner circumferential surface of the FRP outer shell. The upper and lower ribs are connected by a plurality of ribs protruding from each other, and the upper and lower ribs protruding from the inner peripheral surface of the upper surface of the FRP outer shell and the inner peripheral surface of the sole are spaced apart from each other. Features a wood club head for golf.