| 摘要 |
PURPOSE:To effect operations of closing a pressure supply from a supplying pressure side to a load side simultaneously with the containment of the pressure in the load side by single changeover valve in the manual operation of an air pressure changeover valve. CONSTITUTION:When a shaft 5 is rotated counterclockwise, a piston 6 is pushed up by the energizing force of a spring 6a in accordance with the elevation of a cam surface 8a and a valve body 4 is lifted up. As a result, compressed air in a chamber 1f is released into atmosphere from a port 3a by pushing and opening a check valve 1h. When the shaft 5 is turned clockwise, the cam body 8 pushes down the piston 6 and a shoulder 4e, the valve 4 pushes the valve 3 down, the chamber 1e is communicated with the chamber 1f and the communication between the chamber 1f and the port 3a is left closed. |
