| 摘要 |
A pinch valve, comprising a main body (18) having an elastic tube body (1) stored therein, a cylinder main body (6) having a first cylinder part (3) positioned on the inside upper side of the main body and a second cylinder part (4) diverged from the first cylinder part positioned on the inside lowe r side thereof, a first piston (7) brought into contact slidably with the inne r peripheral surface of the first cylinder part, and a second piston (12) brought into contact slidably with the inner peripheral surface of the secon d cylinder part, wherein a first connection bar (8) having a first press-holdi ng element (10) is installed at the lower end of the first piston, second connection bars (13, 13) having a second press-holding element (14) are installed at the lower end of the second piston, the first and second press- holding elements are disposed so as to hold the tube body from upper and low er sides, springs (15) energizing the first press-holding element are disposed between the second piston and the first press-holding element, and an openin g (27) communicating with a space part (19) surrounded by the first and second pistons and cylinder main body is provided in the cylinder main body.</SDOAB >
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