DIRECTIONAL CONTROL VALVE DEVICE WITH HYDRAULIC REGENERATIVE CIRCUIT

PROBLEM TO BE SOLVED: To perform a regenerative function with relatively simplified constitution without making the whole device large-sized in a directional control valve device with a hydraulic regenerative circuit. SOLUTION: This directional control valve device is provided with a hydraulic regenerative circuit 19 constituted by disposing a regenerative valve device 23 comprising a regenerative selector valve 21 and a check valve 22, at a regenerative oil passage 20 communicating actuator passages 11, 12. The regenerative oil passage 20 is connected to the actuator passage downstream of a load check valve 30. A pressure receiving part 21a actuated in a valve opening direction is provided at one end of the regenerative selector valve 21, and pressure upstream of the load check valve 30 is introduced into the pressure receiving part 21a. A spring 21s and a pressure receiving part 21b actuated in a valve closing direction are provided at the other end of the regenerative selector valve 21, and pressure downstream of the load check valve 30 is introduced into the pressure receiving part 21b. During expansion driving of a cylinder 5, differential pressure across the load check valve 30 is thereby introduced as control signal pressure to the regenerative selector valve 21.