B-7 硬式用バット使用時の打者の手指にかかる衝撃力(反発・発射,衝撃・緩衝)

抄録

Use of metal baseball bat was allowed in the Japan high school baseball from 1974. Since a metal baseball bat has breaking little as compared with wooden bats, it is mainly used by high-school baseball. Many researchers are studied about the properties evaluation of a metal bat. However, discussion of sports injuries such as fractures and discussion of the major impact has not been done very completely imposed on the finger or the batter when using a metal bat. Then, in this study, the system which measures the impact load applied to a batter's fingers is built. And it aims at clarifying the impact force. After clarifying the impact load, the alarm about use of metal bats is sounded. Moreover, the simulation of a ball and a bat is performed using the finite element method, and it gropes for the method of easing a batter's burden from both sides of an exmeriment and analysis. First, a three-dimensional-CAD system is used and design and manufacture of an experimental device are performed. The system by which the impact load applied near the grip of metal/wooden bat are measured and evaluated is produced.