| 摘要 |
PROBLEM TO BE SOLVED: To provide a chuck device capable of maintaining a stable fastening state.SOLUTION: A chuck device 1 mounted on a drive device having a rotatable drive shaft has a substantially cylindrical chuck body 30 arranged in the same coaxial direction AL as the drive shaft and having a center hole 30a allowing insertion of a base shaft J of a rotary jig in a distal end side of the same, a plurality of jaws 20 inserted in to a jaw inserting hole 37 communicating with the center hole 30a in a distal end side and opening to a lateral side of the chuck body 30 in the rear end side in the chuck body 30, an inner nut 70 synchronously moving the plurality of jaws 20 in an oblique direction in the jaw inserting hole 37 by screwing to the chuck body 30 and the jaws 20, a front outer spring 110 carrying out input operation of rotating power, and a sleeve rotation regulating mechanism 120 limiting rotation of the front outer sleeve 110 in a fastened state to the chuck body 30 by friction force in a rotation direction. |
