| 摘要 |
PURPOSE:To enable pneumatic and hydraulic operations to be carried out properly by constructing the title cylinder in a unique double-head type double cylinder structure. CONSTITUTION:An inner pneumatic cylinder 1 whose one side is a double cylinder structure, is a cylinder to be inserted while a cylinder to be fitted around it is a first outer hydraulic cylinder 2 which press-feeds its holding fluid pneumatically. Similarly the other side of the cylinder 2 is a double-cylinder structure, and a cylinder to be fitted around it is a second outer hydraulic cylinder 3 which press-feeds its holding fluid pneumatically. In the condition of the drawing, when compressed air is supplied from an air intake/discharge port P1 through a pipe passage 24 by means of the operation of an air pressure control circuit 17 to an air intake ports P2, P4 through pipe passages 22, 23 simultaneously and thereby first and second changeover switch valves 11, 12 are opened, the fluid chamber 13 of the inner hydraulic cylinder 1 is communicated with the fluid chamber 8 of the second outer hydraulic cylinder 3, the compressed air is supplied from the air intake/discharge port P1 and the pneumatic piston 4a is moved forward.
|
