| 摘要 |
PURPOSE: To provide a tool chuck capable of strongly tightening and fixing a tool and easily performing tightening and fixing and fixing and releasing operations. CONSTITUTION: When an input from an operation ring 8 becomes fixed torque or more at the time of holding a tool A, a sleeve 10 is compressed and deformed with reaction force generated in an engaging part of an input ring 12 and an output ring 7, the input ring 12 is made eccentric on the center side of a chuck main body 2 and engagement of the input ring 12 and the output ring 7 is instantaneously released. Because the input ring 12 and the output ring 7 are compulsorily engaged by elasticity of the sleeve 10 and mutual engaged locations are successively displaced one tooth by one tooth just after the release, a nut ring 6 is rotated in a tightening direction with instantaneous impact force generated at the time of mutual engagement, each chuck pawl 4 can be equally and incrementally tightened and tightening force of two times or more as compared with tightening and fixing with only decelerated rotation force can be obtained. |
