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    • 6. 发明专利
    • DUAL STROKE CYLINDER
    • JP2001165119A
    • 2001-06-19
    • JP35182099
    • 1999-12-10
    • SMC CORP
    • HIRANO AKIHIRO
    • F15B15/17F15B11/12F15B15/14F15B15/16
    • PROBLEM TO BE SOLVED: To provide a dual stroke cylinder free from an impact force, even if a piston rod is stopped at an intermediate position. SOLUTION: A first piston 13A for fixing a shaft 18 on a head cover part 12B of the cylinder 12 and for sliding on the circumferential surface thereof, a second piston 13B on the side of a rod cover part 12C thereof, and the piston rod 17 having a hollow part 17A and integrated with the piston 13B are installed in the cylinder. A first cylinder chamber 14A is formed on the head cover part 12B side of the first piston, a second cylinder chamber 14B is formed between the first and second pistons, and a third cylinder chamber 14C is formed on the rod cover part 12C side of the second piston. When compressed air is supplied to the second cylinder chamber, the piston rod is moved to the intermediate position where the piston rod abuts on a stopper member 19, and when the compressed air is supplied to the first cylinder chamber, the piston rod is moved to the stroke terminal.