| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent an excessively heavy load from being applied to a specific spot of a nut through a driving rod, by connecting a threaded shaft to a driving shaft in such a way that the nut is screwed on the threaded shaft by its inside thread part and in the driving rod by its outside thread part. SOLUTION: A thread part 21 which is meshed with the trapezoidal screw thread 10 of a threaded shaft 11 is provided on the inner peripheral surface of a nut 19 made of a synthetic resin and a thread part 23 which is meshed with a thread part 22 provided on the inside of the opened end of a driving rod 13 is provided on the outer peripheral surface of the nut 19. When the nut 19 is screwed in the driving shaft 13 in a state such that the recessed fitting section 25 of the nut 19 meets the fitting section 26 of the rod 13, a turning inhibition member 20 is evenly brought into contact with the outer periphery of the rod 13 and pressed against the rod 13. When an engaging section 20a reaches the position at which the section 20a meets a locking section Y composed of the recessed fitting section 25 and fitting section 26, the turning inhibition member 20 returns to its original shape due to the elasticity of a connecting member 20b, and the section 20a is engaged with the locking section Y. Therefore, the nut 19 can be easily attached firmly to the rod 13 without turning (slipping).</p> |
