| 摘要 |
PROBLEM TO BE SOLVED: To provide a spiral reinforcement facilitating positioning with an insertion reinforcement. SOLUTION: Hooked parts 2A, 2B are formed at both ends of the spiral reinforcement 1. A diameter d of each of the hooked parts 2A, 2B is smaller than the diameter D of the part 3 between the ends. The hooked parts 2A etc. are formed to be substantially coaxial with the whole spiral reinforcement 1. The hooked parts 2A etc. are fitted to the insertion reinforcement etc., which is an object of the fitting, and the positioning and fixing can be easily carried out simultaneously. In the drawing, the cross sectional shape of the spiral reinforcement is a circle, however, this invention can be similarly applied to a square-shaped one. COPYRIGHT: (C)2008,JPO&INPIT
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