| 摘要 |
PROBLEM TO BE SOLVED: To provide a chuck device, surely lockable, with a simple structure. ! SOLUTION: The chuck device 1 is provided with a chuck body 11, a plurality of jaws 12, a nut ring 35, a plurality of balls 34 for rolling by being sandwiched between the nut ring 35 and the chuck body 11, a retainer 33 for holding the plurality of balls 34 so as to be autorotatable S and relatively rotatable to the chuck body 11 and the nut ring 35 and a spring ring 36 rotatable together with the nut ring 35 and constituted so as to be capable of switching a rotation regulation state of regulating rotation in the loosening direction to the retainer 33 and a regulation release state of releasing regulation of the rotation in the loosening direction to the retainer 33, and a ball bearing 32 is constituted of the plurality of balls 34 and the retainer 33 in the regulation release state, and a lock mechanism is constituted with the balls 34 sandwiched between the nut ring 35 and the chuck body 11 as a rotational load i |
