| 摘要 |
PROBLEM TO BE SOLVED: To provide equipment used for a swing practice of baseball which has two swing-through points prepared by flexible pipes of rubber materials so that the basics of the swing of baseball can be mastered. SOLUTION: The flexible pipes of rubber materials (2) are attached to four up and down places of a frame (1) made of a processed iron pipe by bands (3). The two swing-through points (4) of narrow spaces are disposed between the the flexible pipes of the rubber materials (2) disposed vertically. The swing following the correct basics can be mastered naturally by swinging a bat into the swing-through point (4) of the narrow space first at the near side and then swinging the bat through the second swing-through point (4) of the narrow space at the far side. COPYRIGHT: (C)2005,JPO&NCIPI
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