Tube pump

Abstract

A tube pump includes a base, a columnar inner peripheral surface, a tube disposed along the inner peripheral surface, a rotor disposed concentrically with the inner peripheral surface and supported by the base while squeezing the tube between the rotor and the inner peripheral surface, and a drive unit having a drive shaft passing through the base and configured to couple with the rotor, the base having a cylindrical supporting part configured to support the rotor and the drive shaft being inserted in a hollow portion of the supporting part, the tube pump including a bearing configured to rotatably support the rotor, the rotor having a body on which a coupling hole configured to accommodate the supporting part and the bearing is formed and an annular groove extending in a circumferential direction being formed on an inner peripheral surface of the body, the bearing fitting in the annular groove.

What is claimed is: 
     
         1 . A tube pump, comprising:
 a base;   a columnar inner peripheral surface disposed at one face side of the base;   a tube of which at least a portion is disposed along the inner peripheral surface;   a rotor disposed concentrically with the inner peripheral surface and rotatably supported by the base while squeezing the tube between the rotor and the inner peripheral surface; and   a drive unit attached on an other face side of the base and having a drive shaft passing through the base and configured to couple with the rotor,   wherein the base has a cylindrical supporting part protruding to the one face side and configured to support the rotor,   wherein the drive shaft is inserted in a hollow portion of the supporting part,   wherein the tube pump further comprises a bearing put on an outer periphery of the supporting part and configured to rotatably support the rotor,   wherein the rotor has a substantially cylindrical body on which a coupling hole configured to accommodate the supporting part and the bearing is formed,   wherein an annular groove extending in a circumferential direction is formed on an inner peripheral surface of the body, and   wherein the bearing fits in the annular groove.   
     
     
         2 . The tube pump according to  claim 1 ,
 wherein the bearing is a sliding bearing rotatably fitted in the annular groove.   
     
     
         3 . The tube pump according to  claim 1 , comprising:
 a pair of the bearings; and   a cylindrical spacer tucked between the pair of bearings and placed on the outer periphery of the supporting part,   wherein the pair of bearings and the spacer fit in the annular groove.   
     
     
         4 . The tube pump according to  claim 3 ,
 wherein the spacer is fixed to the body of the rotor.   
     
     
         5 . The tube pump according to  claim 1 ,
 comprising a coupling member configured to couple the drive shaft of the drive unit and the rotor,   wherein a coupling hole in which one end of the coupling shaft fits is formed at a center of the rotor, and   wherein a fitting hole in which a distal end of the drive shaft fits is formed on one end of the coupling member.