| 摘要 |
PROBLEM TO BE SOLVED: To solve problems that an assembling/disassembling type ball game goal frame has deflection and twisting in a cross bar, especially due to a connecting method between the cross bar both ends and supports, and employs a lot of large-diameter pipes and structural members for preventing the deflection and twisting, resulting in no reduction in both weight and time for assembling/disassembling. SOLUTION: A support connecting reinforcing member or the upper end of the support and a cross bar connecting reinforcing member are connected into T shape and reinforced and connected by a rib or a square column member. The lower ends of the left/right supports are pulled inward between the supports and anchored with ground buried support devices. If it is still deflected, a connecting mechanism using screws for determining the angle of the connecting parts between the supports and the cross bar, turning the screws to minimize the deflection and retaining the connecting angle between the supports and the cross bar in assembling the goal of exceeding 90°and not more than 100°is attached. The supports are freely rotationally turn about the cross bar for preventing the twist of the cross bar connecting parts. Or, a telescopic type is adopted for the cross bar part. COPYRIGHT: (C)2005,JPO&NCIPI
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