| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a bat for baseball or softball which can reduce the consumption of impact energy as ball transformation energy and in particular to provide a light bat for baseball or softball, and furthermor which is easy to manufacture to provide a low cost bat for baseball or softball. <P>SOLUTION: The bat for baseball or softball includes a first tube formed from FRP, a cylindrical second tube having an interior diameter which is larger than an exterior diameter of a part to be hit of the first tube, and having a multi-layer structure including at least two or more layers, and first and second fixing members for fixing the second tube to the exterior periphery of the first tube. The first tube has a stopper part formed by gradually opening the first tube from the part to be hit side towards the tip part side, and having an exterior diameter larger than the interior diameter of the second tube, and a hollow for latching having a groove shape. The second tube is attached to the exterior periphery of the part to be hit, one end of the second tube is fixed to the first fixing member and the other end is fixed to the second fixing member to form a gap located between the first tube and the second tube. The second fixing member includes a protrusion part being fixed to the first tube by interlocking with the hollow for latchinga. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
