| 摘要 |
PROBLEM TO BE SOLVED: To stabilize a pump efficiency and extend a life of a tube by setting to the tube pump a tube guide for regulating a position of the tube in the tube pump. SOLUTION: A rotary supporting member 35 is axially supported by a pump shaft 42 to be rotatable, with having a gear in the outer circumference for receiving a rotary driving force. Moreover, a tube guide 44 is set at a position of the rotary supporting member 35 corresponding to a tube 15 to regulate a movement of the tube 15 in a direction of the pump shaft 42. The tube guide 44 is formed of a ring member having guide parts of a U section at a plurality of points on the circumference and at the entire circumference. The guide parts are opened outward in a radial direction. A pump efficiency is stabilized at an ink supply from an ink tank to a sub tank or at an ink circulation from the sub tank to a recording head, etc. |
