JPH0737235U - Gateball head - Google Patents

Abstract

(57) [Abstract] [Purpose] It is possible to freely divide and assemble, to extend the life of the shaft mounting part, and to securely fix the shaft to prevent it from falling off. [Configuration] A substantially rod-shaped enclosure 2 is located inside the hollow head body 1 along the length direction. The shaft mounting member 3 is fixed through the substantially central portion of the enclosure.

Description

[Detailed description of the device]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gateball head, and more particularly, to a mounting portion for the head and the shaft.

[Prior Art] Conventionally, the structure of this portion of the gate ball head using a hollow light metal is a shaft fixing type as shown in FIG. 4, or a meat type as shown in FIG. 5 and FIG. It is known to use specially shaped pipes of increased thickness. (See, for example, Japanese Utility Model Publication No. 62-3175).

[Problems to be Solved by the Invention] In the former fixed type among those described in the related art, since the head main body (a) has a small wall thickness, the shaft mounting metal fitting is screwed, or Although it cannot be press-fitted and is welded, the shaft connection point (b) is on the front side of the person who uses it when hitting the ball, and the appearance is damaged, so only the shaft connection point (c) is welded, resulting in a hit ball. It is inconvenient to carry because it cannot be split and stored because the shaft is cracked due to the impact and the shaft and head are integrated.

In the latter case, the shaft mounting metal fitting (c) passes through the cavity (d) by screwing or press fitting and is mounted from the shaft mounting side, so the contact surface with the head main body (a), that is, the screw thread. The hooking surface (e) is extremely small, and due to repeated loosening of the screw due to impact and vibration at the time of hitting the ball, the thread catching surface (e) is significantly worn away and the shaft is mounted from the head body (f) when hitting the ball. There was a problem that the metal fittings (c) and the shaft might fall off.

The present invention has been made for the purpose of solving such a problem, and it is possible to prevent the falling of the shaft by surely performing the split assembly, extending the life of the screw of the shaft mounting portion, and securely fixing the shaft. It is intended to provide a head for a gate ball.

[Means for Solving the Problems] In order to achieve the above object, in the gate ball head according to the present invention, an enclosure is inserted into the inside of the head body, and the head body and the shaft mounting bracket are inserted through the enclosure. It is formed by increasing the joint area with.

Further, it is desirable that the enclosure to be inserted has a length equal to or larger than the diameter of the hole of the shaft mounting metal fitting in the longitudinal direction of the head body.

Further, the outer shape of the enclosure is preferably the same as the inner shape of the head main body.

Then, an enclosure having an outer diameter slightly larger than the inner diameter of the head body or an enclosure having a slight inclination may be press-fitted.

Further, it is preferable that the inner surface of the head main body, the outer surface of the enclosure, or both of them be grooved to prevent slippage, or be fixed via a slip agent such as sand.

[Operation] Since the enclosure eliminates the cavity of the shaft mounting portion, increases the joint area with the shaft mounting metal fitting, and is formed larger than the shaft mounting metal fitting, the shaft mounting metal fitting is prevented from falling off.

Embodiments Embodiments will be described with reference to the drawings. 1 to 3, the head body 1 and the enclosure 2 are made of a light metal such as aluminum alloy, and the enclosure 2 is made of iron, brass, aluminum alloy, etc. It is formed to be about 2 to 3 times longer, has a non-slip groove around it, and is coated with an adhesive mixed with an anti-slip agent such as sand. Positioned by press fitting into the mounting part.

The shaft mounting metal fitting 3 is fixed by a screwing method in which a hole for the shaft mounting metal fitting 3 is provided in a direction from the outside of the head main body 1 toward the inner enclosure 2 and an adhesive is applied, or by a press-fitting method. When the shaft and the shaft mounting member 3 are integrally formed and mounted as shown in FIG. 3, they are screwed.

[Consideration of the Invention] Since the present invention is configured as described above, it has the following effects.

Since the enclosure does not have a cavity in the shaft mounting portion of the head body, when the shaft mounting metal fitting hole is formed, the head body can be firmly fixed without being affected by the wall thickness of the head body, and the shaft mounting portion can be mounted. Form a retainer to prevent metal fittings from falling off.

Since the contact surface between the shaft mounting member and the surrounding body, that is, the screw thread catching surface is large, it is possible to prevent the screw from loosening due to impact and vibration at the time of hitting the ball, and to prevent frequent shaft and head damage. Even when disassembling, the wear of the thread catching surface can be extremely reduced.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of a main part of a head to which an enclosure is fixed.

FIG. 2 is a longitudinal sectional view of a main part of FIG.

FIG. 3 is a cross-sectional view of a head mounted with a shaft mounting member in which an enclosure is fixed and which is integrated with a shaft.

FIG. 4 is a transverse cross-sectional view of a conventional shaft-fixed type main part.

FIG. 5 is a longitudinal sectional view of a main part of a head using a conventional specially-formed pipe with increased wall thickness.

6 is a transverse cross-sectional view of the main parts of FIG.

[Explanation of symbols]

 1 Head body 2 Enclosure 3 Shaft mounting bracket 4 Hitting part

Claims (1)

[Scope of utility model registration request] 1. A shaft mounting metal fitting (3) is prevented from falling by fixing a hollow head body (1) made of a light metal and an enclosure (2) made of a light metal inserted from the side of a hitting portion (4). A head for a gate ball, which is characterized by forming a tool.