| 摘要 |
<p>PROBLEM TO BE SOLVED: To make a device compact by reducing the number of successively provided operation valves. SOLUTION: Between a plurality of pumps 12 and 13 and a plurality of actuators 14bo, 14st, 14bu, 14trL, 14trR and 14sw, a control valve 15 is provided to incorporate a plurality of operation valves 15bo, 15st, 15bu, 15trL, 15trR and 15sw for controlling the actuators one to one. Inside this control valve 15, a flow rate coupling valve 23 is provided between pump lines 21 and 22 for feeding pressure oil from the plurality of pumps 12 and 13. This flow rate coupling valve 23 has a closed position cl for dividing the flow of pump pressure oil from the plurality of pumps 12 and 13 and feeding the pressure oil to each operation valve, and an open position op for combining the divided flows of pressure oil and feeding it to each operation valve.</p> |
