| 摘要 |
PROBLEM TO BE SOLVED: To present a preassembled unit of a connection member without using a special screw. SOLUTION: This connection member 1 comprises a screw 2 and a sleeve 3 mounted to the screw in a restrained state. The screw includes a head part 4 and a shaft 5. On the shaft, a threaded part 7 is formed in a state separated from the head part, a shaft part 6 is formed in a state adjacent to the head part, and the shaft part has a reduced diameter relative to the outer diameter of the threaded part. The sleeve includes a first narrowing part 10 having a diameter smaller than the outer diameter of the threaded part. The first narrowing part constitutes a non-elastic undercut along with an end region of the threaded part adjacent to the head part. COPYRIGHT: (C)2009,JPO&INPIT
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