| 摘要 |
PROBLEM TO BE SOLVED: To improve cam rotation operability and also to miniaturize a device by incorporating liquid supply tube connecting port parts, a cam, a sheet-shaped member being adjacent to a port part opening and its pressure contact means in a housing and press-contacting and separating the sheet-shaped member to/from the port part opening by the rotation of the cam. SOLUTION: A handle A is rotated and operated in accordance with a position which is displayed in the upper part D of a housing in the clockwise direction at a perpendicular interval. Thus, a cam K is linked and rotated. Pressure contact parts Q1-Q3 provided in a pressure contact means L are pressurized or released from the pressurization in accompany with the rotation of the cam K in accordance with the rotation angle. A sheet-shaped member I is brought into pressure contact with or separated from other end openings b1-b3 of port parts B1-B3 by the pressurization and the pressurization release. Thus, the rotary operation of the cam K becomes excellent and a flow passage changing- over device is miniaturized. |
