| 摘要 |
PROBLEM TO BE SOLVED: To provide a goal for a ball game that can be efficiently assembled and disassembled and can be assembled in a manner that prevents a crossbar from warping downward. SOLUTION: The goal for a ball game is structured so as to connect a crossbar 10 forming the entrance of the goal and a pair of right and left goal posts 20 through a crossbar joining material 30. The goal post 20 has a crossbar connecting shaft 22 extending inwardly and laterally of the upper end portion. The crossbar 10 and the crossbar connecting shaft 22 are nearly hollow cylindrical in section and the crossbar joining material 30 is inserted into the hollow portion, and the crossbar 10 and the crossbar connecting shaft 22 and the crossbar joining material 30 are connected with bolts screwed from the rear. A rotation regulation section regulating the rotation of the crossbar joining material 30 around the shaft is formed in the inside periphery of crossbar 10 and the crossbar connecting shaft 22 and the outside periphery of the crossbar joining material 30. COPYRIGHT: (C)2005,JPO&NCIPI
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