| 摘要 |
PURPOSE:To proling the service life of an elastic tube as well as to make the elastic tube replaceable so easily, by pressing a pair of elastic tubes making a transfer direction of fluid differ each, to both sides of a rotor through spring force. CONSTITUTION:A pair of elastic tubes 13 are held by a tube keeper 14 and forcibly pressed to both sides of a rotor, respectively. One end of a coil spring 17 is attached to the tube keeper 14, while the other end of the coil spring is hooked to a spring clip 18 of a tube keeper at the opposite side. Therefore, the tube keeper comes to press the elastic tube to a roller by dint of spring force of the coil spring in consequence, so that with the tube keeper turned round, improvements in the service life of the elastic tube and the facilitation of its replacement both are well promoted.
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