| 摘要 |
PROBLEM TO BE SOLVED: To provide a tightening fitting for straining a chain wound around a form so that the form does not swell in molding a cylinder using concrete. SOLUTION: After a cylindrical body 4 is put around a bolt 2, a nut 5 is screwed. The cylindrical body 4 is a simple cylinder with no internal thread on the inner peripheral surface, and a nut head 3 serves as a stopper so that the cylindrical body 4 does not fall. A hook 6 for hooking the chain 12 is welded to each of the nut 5 and the cylindrical body 4, with the opening facing inside. COPYRIGHT: (C)2007,JPO&INPIT
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