| 摘要 |
<p>PURPOSE:To perform interlock easily by applying operating pressure to an actuator only when a pilot valve which makes selective action according to the pilot pressure of a regulating valve is in operation and another pilot valve which is operated according to the discharge operating pressure of the pilot valve of another unit is not in operation. CONSTITUTION:First pilot valves 23-26 are connected to a regulating valve 20 which sets the working liquid from a pilot liquid pressure pump 21 to plural steps of pilot pressure under the pressure control of a control line. Meanwhile, second pilot valves 30-37 are set to operate on the operating pressure which drives the actuator of another unit. When the second pilot valves 30-37 become inoperative when one of the first pilot valves 23-26 is selectively operated by the regulating valve 20, direction switching valves V11-V14 are now operative so that working oil is sent to actuators A11-A14.</p> |
