| 摘要 |
PROBLEM TO BE SOLVED: To effectively prevent slackness of a power tool. SOLUTION: Pins 24, 25, the central sides of which are tip end parts 26, are stored in storage holes 22, 22 drilled in the radial direction in a lock nut 20 free to slide. A ring plate spring 28 is wound in a recessed groove 27 formed on an outer periphery of the lock nut 20, the pin 24 is energized to the central side on an inner peripheral surface of the plate spring 28, the pin 25 is energized to the central side on a key type bent end part 29, and each of the tip end parts 26 projected from an opening 23 of the storage hole 22 is pressurized in a wedge shape between screw threads of a male screw part 17. |
