| 摘要 |
A piston 14 for sliding in a cylinder 12, a rod 16 of the piston 14, and a sleeve 15 fitted over the rod 16 and passing through a rod hole 13 of the cylinder are provided. A lock portion 18 is provided to an outer periphery of a tip end portion of the rod 16. The sleeve 15 having an outer peripheral face for airtightly sliding in the rod hole 13 in the cylinder 12 and an inner peripheral face for airtightly sliding on an outer peripheral face of the rod 16 is provided with an engaging portion 22 on an inner end side to be engaged with an inside of the rod hole 13 of the cylinder and an engaging portion 23 at an outer end side to be engaged with the lock portion 18 of the rod 16. Supply/discharge ports 18A and 19A for supplying and discharging pressure fluid to and from pressure chambers 18 and 19 on opposite sides of the piston 14 in the cylinder are provided and intermediate stop is possible by supplying and discharging pressure fluid to and from the ports.
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