| 摘要 |
PURPOSE:To reduce the consumption of compressed air, by connecting a right and a left outlet ports to each other in order to recover compressed air as driving air when an inlet port is disconnected from the right and the left outlet ports. CONSTITUTION:When a change-over valve is in a neutral state, the rod-side chamber 32 and head-side chamber 33 of an air cylinder 31 communicate with each other through outlet ports 6', 6, an outlet recess 12, a passage 16, another outlet recess 13 and other outlet ports 7, 7' if the right and the left outlet ports 7', 6' are connected to the red-side chamber 32 and the head-side chamber 33 respectively. Some of compressed air in the rod-side chamber 32 is introduced into the head-side chamber 33 or some of compressed air in the head-side chamber 33 is introduced into the rod-side chamber 32 every time the change-over valve is put in the neutral state. Therefore, compressed air which acts for driving in reciprocating motion can be recovered. The consumption of the compressed air can thus be reduced. |
