| 摘要 |
PROBLEM TO BE SOLVED: To provide an elevator valve device in which a pilot passage is simpli fied. SOLUTION: A descending flow rate control valve 86 capable of controlling the flow rate according to pilot pressure is provided by branching a return passage 84 from a main passage 10 extending between a pilot control check value 60 and a raising flow rate control valve 12. A restriction 98 is provided by branching a lowering pilot passage 96 from the main passage 10 on the outlet side from the pilot control check valve 60, an solenoid opening and closing valve 102 is provided upstream from the restriction 98, and an electromagnetic proportional pilot valve 106 is provided downstream from the restriction 98. Pilot pressure is introduced from the lowering pilot passage 96 extending between the restriction 98 and the electromagnetic proportional pilot valve 106 to the flow rate control valve 86, and pilot pressure is introduced from the lowering pilot passage 96 extending between the solenoid opening and closing valve 102 and the restriction 98 to the pilot control check valve 60. |
