| 摘要 |
PROBLEM TO BE SOLVED: To provide screw accessories and coloring method, enabling accurate and safe assembling and dismantling of members to be fastened by coloring to indicate difference of dismantling temperatures. SOLUTION: A wire rod made of a shape memory alloy is bent by forming, restored to its stored initial shape by heating, and provided with a pair of arm parts 12, 13 opened in the radial direction to be pulled out from the head of the screw. In a spacer 10 held between the head of the screw and a panel cover, coloring is performed by plating, painting and chemical composition treatment so that difference of the shape restore temperature (decomposition temperature) of a pair of arm parts 12, 13 selected according to the combination of the screw and the panel cover is differetiated. COPYRIGHT: (C)2006,JPO&NCIPI
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