| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a bat having an improved joint strength between a grip and a batting part. <P>SOLUTION: In the batting tool, an end part 11 to be joined has a first support hole 17 on a joint opening 13 side, a second support hole 19 which is formed on the depth side of the first support hole 17 and has a larger diameter than the first support hole 17, and a striking receiving surface 21 which is formed between the first and second support hole parts 17 and 19 and is orthogonal to its shaft core. A connector 7 has an internal diameter part 25 fitted and fixed to the joint end part 9 of a grip part 3, a first fitting shaft part 27 of an outer diameter fitted to the first support hole 17, a second fitting shaft part 29 of the outer diameter fitted to the second support hole 19, a striking surface 31 which is formed between the first and second fitting shaft parts 27 and 29, and is orthogonal to its shaft core, and an outer male thread 33a and a lock screw 33b fastened and engaged with the outer end of the joint opening 13 and strike-fastened to the striking receiving surface 21. <P>COPYRIGHT: (C)2011,JPO&INPIT |
