| 摘要 |
PURPOSE: To reduce consumption power and prevent contamination in working environment. CONSTITUTION: A driving circuit is provided with a compressor 2, a high pressure tank 12 connected to the discharging port 2a of the compressor 2, a low pressure tank 13, a driving switching valve 15 which is PAB connected, a high pressure flow passage 17 for communicating the high pressure tank 12 and the feed port P of the switching valve 15 with each other, a low pressure flow passage 18 for communicating the discharging port R of the switching valve 15 and the low pressure tank 13, and an intake switching valve 14 for communicating the intake port 2b of the compressor 2 by switching into outside air and the low pressure tank 13 with each other. Output ports A, B of the switching valve 15 communicate with the pressure chambers 5a, 5b of a fluid pressure cylinder 5 so as to form a closing pipe passage in order to carry out intake and exhaust of compressing air to the fluid pressure cylinder 5. Since exhaust air is not discharged outside the driving circuit 11, it is possible to reduce power comsumption, reduce energy, and prevent contamination in working environment. |
