| 摘要 |
PURPOSE:To simplify the construction of a hydraulic circuit and to reduce the cost by interposing one master cylinder in oil paths for operating a plurality of actuators and disposing limit switches on both end portions of the master cylinder. CONSTITUTION:In oil paths 6a, 6b for operating a plurality of actuators 1a, 1b, 1c, 1d, there is provided a single master cylinder 2 having the capacity for oil quantity required for operating all the actuators which allow for a little margin, and limit switches 3a, 3b are disposed on both end portions of the master cylinder 2. In this arrangement, the specified operation of plural actuators 1a, 1b, 1c, 1d can be detected by two limit switches 3a, 3b. Thus, the construction can be simplified, the cost is reduced, and a trouble-free hydraulic circuit can be attained.
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