| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the following problems: although a conventional competition ring comprising a rigid metal frame and metal frame wooden pallets is heavy, it is robust, it is difficult to keep a horizontal face of a competition base, and assembly is hard labor and is dangerous work. <P>SOLUTION: A competition base is configured to arrange and align a plurality of resin pallets side by side such that the competition base becomes planarly nearly square. The four corners of the competition base are disposed with poles, and braces pulling the poles toward the center below the competition base and ropes independently pulling the mutual poles along the periphery of the competition base above the competition base are disposed. An intersection point of the resin pallets adjacent to each other is provided with support means connecting and supporting them. The support means comprises: a plurality of struts each capable of expanding and contracting, and each allowing the fixing of an expanded and contracted state; a support base provided above the struts; and fixing means comprising the resin pallets, provided in the support base. <P>COPYRIGHT: (C)2013,JPO&INPIT |
