| 摘要 |
There is provided a workpiece support that has a simplified structure and can operate with improved dependability and reliability. The workpiece support (1) has a rod (4), a sleeve body (10) that is externally fitted on the rod (4) and that is elastically deformable so as to shrink in diameter, a case member (3) for supporting the sleeve body (10), and an external peripheral hydraulic chamber (23) formed on the external periphery of the sleeve body (10). A hydraulic cylinder (5) is provided for moving the rod (4) in the axial direction, and oil passages (35, 35a, and 35b) are provided for connecting the hydraulic operating chamber (16) of the hydraulic cylinder (5) with the external peripheral hydraulic chamber (23) when the piston member (30) of the hydraulic cylinder (5) has moved up to or to the vicinity of the stroke end thereof. <IMAGE> |
