| 摘要 |
PURPOSE:To fix a workpiece without turning claws and using hydraulic pressure by moving the rear ends of a plurality of claws projecting to an end of a rotary shaft body to slide inclined to the axis and engage an operating shaft moved in the rotational direction. CONSTITUTION:When an operating shaft 35 is moved axially forward of a chuck body 31 to move forward an engaging portion 36, a rear claw portion 47 slides forward on the rear end 39a of a shrouding ring, and claws 43 are moved to a position of an imaginary line 51 along an imaginary line 42. And a space in which a workpiece 37 is disposed is formed in front of a fixed por tion 50 and disposed on an end face 50a. When the operating shaft 35 is moved rearward, the engaging portion 36 is also moved to move the claws 43 along the imaginaly line 42 and fix the workpiece 37 between the step portion 45a of claw base portion 45 and the end face 50a. Thus, only the forward and back ward movement of claws 43 enables the workpiece to be removably attached so that the construction is simplified and the lay-out of attachment mechanism such as nozzle, etc. is not limited. |
