Tube Pump and Tube Stabilizer

Abstract

A tube pump comprises a rotor configured to have a roller and to hold the roller to be able to make an orbital motion along the inner circumferential surface of the cap. The rotor includes a disk part which holds the roller on a base side, and a tube press member that engages with the disk part so that the tube does not move to the base side with respect to the disk part, seals a gap formed with respect to the inner circumferential surface of the cap, and is capable of rotating along an outer circumferential part of the disk part is provided at the outer circumferential part of the disk part.

What is claimed is: 
     
         1 . A tube pump, comprising:
 a cylindrical inner circumferential surface;   a tube arranged along the inner circumferential surface; and   a rotor configured to
 receive a roller, 
 hold the roller to make an orbital motion along the inner circumferential surface, and 
 transport content of the tube by pressing the tube with the roller to cause a peristaltic motion of the tube, 
   wherein the rotor includes
 a disk part; 
 a roller presser member holding the roller with the disk part, the presser member having a hole; 
 a main support shaft formed on a central part of the disk part such that the main support shaft extends to but not beyond the roller presser member and contacts the roller presser member; and 
 an elongated member arranged parallel to the main support shaft, the elongated member being elongated into the hole of the roller presser member. 
   
     
     
         2 . The tube pump according to  claim 1 , wherein the rotor comprises a rib extending along the main support shaft, the rib connecting the disk part and the roller presser member. 
     
     
         3 . A tube pump, comprising:
 a cylindrical inner circumferential surface;   a tube arranged along the inner circumferential surface; and   a rotor configured to
 receive a roller, 
 hold the roller to make an orbital motion along the inner circumferential surface, and 
 transport content of the tube by pressing the tube with the roller to cause a peristaltic motion of the tube, 
   wherein the rotor includes
 a disk part; 
 a roller presser member holding the roller with the disk part; 
 a main support shaft formed on a central part of the disk part such that the main support shaft extends to the roller presser member; and 
 a rib extending along the main support shaft such that the rib connects the disk part and the roller presser member. 
   
     
     
         4 . The tube pump according to  claim 1 , further comprising:
 a drive unit configured to rotate the rotor;   a base arranged between the rotor and the drive unit, the drive unit being attached to a surface of the base; and   a cap attached to other surfaces of the base, the cap forming a space in which the rotor and the tube are accommodated.   
     
     
         5 . The tube pump according to  claim 4 , wherein
 a hole extending in a direction of the roller is formed in a center of the roller; and   a roller support shaft is formed on the disk part, the roller support shaft rotatably supporting the roller by extending toward the roller presser member and accommodated in the hole of the roller.   
     
     
         6 . The tube pump according to  claim 5 , wherein
 a plurality of ribs are formed such that a cross section radially extends from the main support shaft;   a plurality of roller support shafts are formed around the main support shaft; and   respective ribs among the plurality of ribs is arranged between two of the roller support shafts adjacent to each other.   
     
     
         7 . The tube pump according to  claim 4 , further comprising a tube press member rotatably engaged with the disk part at an outer circumferential of the disk part, the tube press member sealing a gap between the disk part and the inner circumferential surface so that the tube does not move to an other side with respect to the disk part. 
     
     
         8 . The tube pump according to  claim 7 , wherein
 a step part is formed on an outer circumferential surface of the disk part such that a diameter of the disk part is made larger on the base side; and   the tube press member is ring-shaped member and has an inner circumferential surface on which another step part engaging with the step part of the disk part is formed.   
     
     
         9 . The tube pump according to  claim 4 , wherein
 a rotor support shaft is formed on the cap to extend toward the base; and   a bearing hole is formed on the rotor so as to enable the rotor to rotate around the rotor support shaft.   
     
     
         10 . The tube pump according to  claim 4 , further comprising a joint shaft that transmits a rotational motion of an output shaft of the drive unit to the rotor, wherein
 a positioning shaft part having a non-circular cross section is formed on a rotor side end portion of the joint shaft;   an engagement shaft part having a non-circular cross section and a diameter larger than that of the positioning shaft part is formed on a drive unit side portion of the joint shaft with respect to the positioning shaft part;   a positioning hole capable of engaging with the positioning shaft part is formed in the support shaft; and   an engagement hole capable of engaging with the engagement shaft part is formed in the disk part.   
     
     
         11 . The tube pump according to  claim 10 , wherein the positioning shaft part is formed such that a cross section radially extending from a center axis line of the joint shaft has a “Y” shape. 
     
     
         12 . The tube pump according to  claim 10 , wherein the engagement shaft part has a cross section having a triangular shape. 
     
     
         13 . The tube pump according to  claim 4 , wherein
 the inner circumferential surface is formed on the cap;   a first nail is formed to protrude outward in a radial direction on a part of an outer circumferential surface of the cap;   a recession in which the cap is accommodated is formed on the base;   a second nail is formed on the recession of the base such that the second nail engages the first nail to prevent the cap from dropping off the base; and   the second nail contacts the outer circumferential surface of the cap, and the cap is reinforced by the second nail from an exterior in the radial direction.   
     
     
         14 . The tube pump according to  claim 13 , wherein
 an engagement projection is formed on one of the second nail and the outer circumferential surface of the cap which contacts the second nail; and   an engagement recession is formed on another nail of the base and the outer circumferential surface of the cap.   
     
     
         15 . The tube pump according to  claim 14 , wherein the engagement projection is formed in a shape of a pin extending in an axis direction of the cap. 
     
     
         16 . The tube pump according to  claim 2 , further comprising:
 a drive unit configured to rotate the rotor;   a base arranged between the rotor and the drive unit, the drive unit being attached to a surface of the base; and   a cap attached to other surfaces of the base, the cap forming a space in which the rotor and the tube are accommodated.   
     
     
         17 . The tube pump according to  claim 3 , further comprising:
 a drive unit configured to rotate the rotor;   a base arranged between the rotor and the drive unit, the drive unit being attached to a surface of the base; and   a cap attached to other surfaces of the base, the cap forming a space in which the rotor and the tube are accommodated.