JPS599662Y2 - metal bat - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement in the structure of the grip end of a metal bat, particularly a metal bat made primarily by swaging an aluminum alloy pipe.

Conventionally, the grip end of a metal bat is generally attached to a cap-shaped metal grip 12 manufactured separately from the bat body 11, as shown in FIG. end 11 a
is inserted and welded together at the peripheral edge of the opening 13 to form the shape.

However, in the case of such a structure, the tip of the bat body 11 simply contacts the bottom surface of the grip 12, and all the force applied to the grip 12 is concentrated on one welded part 14. In general, the bat body 11 is made of an AI alloy containing Cu, Mg, Zn, etc. to increase its hardness, and since its melting temperature is lower than that of the grip 12, sufficient welding cannot be performed when joining the two. Due to such reasons, it was not possible to obtain sufficient bonding strength of the grip 12, and there was a risk that it would shift or even come off from the bat body 11.

Furthermore, when attempting to form a tie-cup-shaped grip end with the above-described structure, the position of the welded portion 14 moves toward the upper part of the bat body 11, and the grip stop 12
Since the grip end is more likely to come off easily, a tie-cup-shaped rubber attachment member 15 was separately prepared as shown in the opening in Figure 2, and the above-mentioned grip stop 12 was bonded to this using an adhesive. It was produced by fitting it over the grip part of the bat body 11.

However, there are drawbacks, such as not only being troublesome to manufacture, but also the fact that the rubber adhered member 15 is fixed by adhesion, which tends to loosen.

This idea further improves the joint and fixing strength of the grip, making it possible to easily form a strong grip end, and also creating a rational grip that can easily form a tie-cup shaped grip end. The purpose is to provide a structure for the end section.

As shown in one embodiment in FIG. 1, this invention consists of a metal bat body 1 and a cap-shaped grip 2 with an opening 3 in the center of the bottom, and the grip of the bat body 1 is The side end 4 is connected to the grip 2 by its upper end opening 5.
The bat body 1 and the grip 2 are integrated by welding at the peripheral edges of both the openings 3 and 5. It is characterized by having a structure.

In the figure, 6 and 7 are welded parts, and 8 is a plug that closes the opening at the tip of the grip side end 4 of the bat body 1.The shape may be formed by welding, or the plug may be formed separately by adhesive. The shape may be formed by tightly fitting the material through the material.

In the illustrated embodiment, the grip stop 2 is shown as having a tie-cup shape, but it goes without saying that it may also be in the shape of a knob as shown in FIG. 2A.

Further, the grip portion of the bat body 1 to which the grip stop 2 is fixed, including the grip stop 2 portion, may be covered with a grip outer cover such as a heat shrinkable tube as necessary.

This invention has the above-mentioned structure, and since the grip 2 is welded to the bat body 1 at two places, the upper end and the center of the bottom, the grip 2 is different from the conventional product.
The force applied to the grip is concentrated only on one welded part 14 at the top and is not affected by a lever action, and the joint fixing strength of the grip 2 is significantly increased, so there is no risk of it wobbling or coming off, making it durable. can be improved.

In addition, since the tip 4a of the grip-side end 4 of the bat body 1 is fitted and welded to the bottom opening 3 of the grip clasp 2, the connection between the two at this portion is strong, and the grip clasp 2 It is possible to ensure the fixation of the bat body 1 by holding the grip 2 at the upper and lower two places as described above.
Since it is welded to the side, even if the position of the upper welded part 7 moves toward the upper part of the bat body 1, there is no particular adverse effect on the joint strength of the grip 2. There is an advantage that the grip stop 2 allows the grip end to be shaped like a tie cup.

[Brief explanation of drawings]

FIG. 1 is a vertical cross-sectional view of the grip end of a metal bat showing an embodiment of the invention, and FIG. 2 is a vertical cross-sectional view of the grip end of a conventional product. 1...Bat body, 2...Grip stop,
3... Bottom opening, 4... Grip side end of bat body, 4a... Tip, 5...
...Opening at the top end, 6,7...Welding part.

Claims (1)

[Scope of utility model registration request] The bat body 1 consists of a metal bat body 1 and a cap-shaped grip 2 with an opening 3 in the center of the bottom.
The grip side end 4 is attached to the grip stop 2 through its upper opening 5.
The bat body 1 and the grip 2 are integrated by welding at the peripheral edges of both the openings 3 and 5. A metal bat characterized by: