| 摘要 |
PROBLEM TO BE SOLVED: To provide a bolt fastening condition identifying device for securely managing the condition of fastening a bolt with specified fastening force. SOLUTION: The device comprises a spring washer 3 laid between a head bottom face 1a of the bolt 1 and a surface 2a of a fastened object 2, a laid part 4 laid between the surface 2a of the fastened object 2 and the spring washer 3, a protruding part 5 extending from the laid part 4 and protruding from the vertical projection plane of the bolt 1, a bent part 6 formed at the middle of the protruding part 5, and an abutting part 7 vertically erected from an end 5a of the protruding part 5 for abutting on a head upper face 1b of the bolt 1 when the bent part 6 is bent. A size L1 from the bent part 6 to the end 5a of the protruding part 5 is the same as a size L2 from the surface 2a of the fastened object 2 in the condition that the bolt 1 is fastened to the fastened object 2 with the specified fastening force to the head surface 1b of the bolt 1. COPYRIGHT: (C)2006,JPO&NCIPI
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