| 摘要 |
In a hydraulic clamp with a direct operated clamping-member, a piston (13) is so inserted into a cylinder bore (11) formed in an upper portion of a housing (4) as to be slidable in the vertical direction. A peripheral wall (11a) of the cylinder bore (11) is projected downwardly and fixedly secured to a lower portion of the housing (4). An opening (12) is so formed in the lower portion of the peripheral wall (11a) as to face a fixed object (2) such as a metal mould. A clamping actuation oil chamber (15) is formed above the piston (13). A spring accommodation bore (21) is formed upwardly from below in a clamping-member (5) which protrudes downwardly from the piston (13), and an unclamping spring (23) is inserted into the spring accommodation bore (21).
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