| 摘要 |
PROBLEM TO BE SOLVED: To provide a nut of simple structure that can be manufactured at low cost, in which formation of a nut main body comprising two-split nut pieces can be easily maintained, and in which work time can be shortened. SOLUTION: In this composite nut, the nut main body 3 is two-split along the center line passing mutually facing apexes, recesses 1a and 2a are formed with projections formed at both end parts of junction surfaces of the nut pieces 1 and 2 on one side, and both end parts of the junction surfaces of the nut pieces 1 and 2 on the other side are cut to form projected parts 1b and 2b. An insertion hole 11 is bored from one surface of a side surface covered part 12 of a crown body 10 to an upper surface covered part 13 in such a way that the crown body 10 can be inserted/removed from sideways of a screw rod 15 engaged with the nut main body 3. For holding a junction state of the nut main body 3 by covering of the crown body 10, lock pieces 14 and 14 are formed on the crown body 10 on both sides of an opening end part of the side surface covered part 12. Lock grooves 4 and 4 are formed at least on either one of both side surfaces of the nut main body 3 at perpendicular positions to the center line passing the mutually facing apexes. COPYRIGHT: (C)2005,JPO&NCIPI
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