Patent ID: 8100675

Claim:
A fluid transporting device comprising: a tube frame having a tube guide wall for arranging a tube having an elasticity in an arcuate shape; a rotary pressure mechanism arranged, when the tube is arranged in the tube frame, on the side opposite to the guide wall side of the tube, such that its center of rotation is aligned with the center of the arc of the tube guide wall, and having a plurality of rollers; a plurality of push pins interposed between the tube and the rotary pressure mechanism and arranged radially of the center of rotation of the rotary pressure mechanism; a switching mechanism disposed in the rotary pressure mechanism for allowing at least one of the rollers to move, in association with the rotating motions of the rotary pressure mechanism, to a position where the push pins release the tube and a position where the push pins are capable of pressing the tube, the switching mechanism including a rocking lever for moving at least one of the rollers to the position where the push pins release the tube and the position where the push pins are capable of pressing the tube, and a regulating lever for engaging with the rocking lever to regulate the position of the rocking lever and to hold the same position; and a slide frame that supports the plurality of push pins, the slide frame including a protruding portion fixedly protruding toward the rotary pressure mechanism such that an end portion of the rocking lever abuts, as the rotary pressure mechanism rotates, against the protruding portion so that the rocking lever is rocked to move at least one of the rollers from the position for the push pins to release the tube to the position for the push pins to press the tube.