| 摘要 |
PROBLEM TO BE SOLVED: To simplify the structure of a hydraulic circuit by feeding the pressure oil discharged from two pressure oil discharge ports to high pressure feed port and a low pressure feed port after sorting the discharged oil into high and low pressure oils so as to share components. SOLUTION: A pressure oil P1 discharged from a pressure oil discharge port 1b is assumed to be higher in pressure than a pressure oil P2 discharged from a pressure oil discharge port 1c. In this case, the outlet of a check valve 32 is shut out, and the outlet of a check valve 31 is opened. Accordingly, the pressure oil P1 on the high pressure side is output from the check valve 32 to a pipeline 55, and fed to a high pressure oil feed port 21e. Also, the pilot check valve 34 is opened, and the pilot check valve 33 is shut out. As a result, the pressure oil P2 on the low pressure side is output from the pilot check valve 34 to a pipeline 56, and fed to a low pressure oil feed port 21f.
|
