| 摘要 |
PURPOSE:To protect a tube from being damaged by preventing a press roller from collapsing the tube when a tubing pump is not operating. CONSTITUTION:A base body 21 has a tubular inner face 21b provided with tube inlet and outlet 23a, 23b at opposing positions. A rotary shaft 25 is provided on the center line of the tubular inner face 21b. A pair of rotary cam members 27 having a plurality of cam grooves 28 in the periphery thereof are secured to the rotary shaft 25 while opposing each other. A pair of guide members 31 having a plurality of radial guide grooves 32 are disposed rotatably around the rotary shaft 25, while opposing each other, between the pair of rotary cam members 27. A roller shaft 34a is engaged, at the opposite ends thereof, with the guide groove 32 and cam groove 28 opposing each other thus supporting a press roller 34. At the time of operation, the rotary shaft 25 is rotated in one direction to move the press roller 34 outward by means of the cam groove 28 and the guide groove 32. At the time of interrupting operation, the rotary shaft 25 is rotated reversely by specific angle to move the press roller 34 inward by means of the cam groove 28 and guide groove 32. |
