| 摘要 |
PROBLEM TO BE SOLVED: To provide a multipoint positioning actuator capable of performing individual adjustment of all the stop positions of a piston. SOLUTION: Racks 21a and 21b engaged with the both sides of a pinion 30 are provided. Two main pistons 20a and 20b independently effecting reciprocating linear slide within cylinders 10 and 11 are disposed. Two auxiliary pistons 25a and 25b effecting reciprocating linear slide at a stroke lower than those of main pistons 20a and 20b within the cylinder 11 in a manner to be capable of making contact with and separating from the main pistons 20a and 20b are individually disposed on the one end side of the main pistons 20a and 20b. Feed discharge ports 18a, 18b, 19a, and 19b to selectively feed and discharge pressure fluid to pressure chambers 15a-15c, partitioned and formed by the main pistons 20a and 20b and the auxiliary pistons 25a and 25b, are formed in the cylinders 10 and 11.
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