JP2014101841A - Tube pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a tube to be easily replaced and to reduce a load due to pulling of the tube by a simple structure in a tube pump.SOLUTION: A tube pump 1 comprises: a fixed circular member 2; a tube 3 which is arranged on its inner wall surface 2a; and first and second free movement circular members 7, 8 to which torque is given from a rotor 6. Since the tube 3 is closed to the inner wall surface 2a of the fixed circular member 2 by pressure by the first and second free movement circular members 7, 8, the tube 3 can be closed by pressure by a few components, in addition, it is only necessary to arrange the tube 3 between the circular inner wall surface 2a and the first and second free movement circular members 7, 8 in tube replacement, a complicated operation for winding the tube 3 in the U-shape along a ring is not required. Thus, it becomes easier to replace the tube by a simple structure. In addition, since the tube 3 is only pushed to the inner wall surface 2a and is not pulled in one direction, a load to the tube 3 can be reduced.

Description

  The present invention relates to a tube pump that performs a pumping action by sequentially closing tubes.

  Conventionally, as a tube pump, a roller pump having a roller that rotates and a ring pump having a ring that moves eccentrically are mainly known. The roller pump performs a pumping action by sequentially closing and closing a tube disposed along an inner peripheral surface of a fixing member serving as a base with a pair of rollers to discharge a fluid in the tube. Further, the ring pump performs pumping action by sequentially closing and closing the tubes arranged along the inner peripheral surface of the fixing member with an eccentric ring to discharge the fluid in the tubes.

  In the above roller pump or ring pump, the tube is disposed in a narrow space between the pair of rollers or the eccentric ring and the inner peripheral surface of the fixing member and is in a closed state. It is difficult to do. Then, the ring pump which can cancel | release the closed state of a tube by a user's operation is known (for example, refer patent document 1). In this ring pump, a tube disposed along a ring is sandwiched from both sides by a pair of opening / closing pieces rotatably attached to a fixing member. The opening / closing piece has a tightening mechanism for maintaining the closed state of the tube, and this tightening mechanism is composed of members such as a mounting base, an engagement lever, and a lock lever. When exchanging the tube, the user operates the engagement lever and lock lever of the tightening mechanism to release the tube from the closed state, and rotates the open / close piece to separate the tube from the open / close piece. The tube is attached and detached by providing a space.

Japanese Patent No. 4034901

  In the ring pump as shown in the above-mentioned Patent Document 1, the tightening mechanism is complicated by being composed of a large number of members, and complicated work for winding the tube in a U shape along the ring is necessary. It is difficult to change the tube. Therefore, the ring pump as shown in Patent Document 1 has a difficulty in practicality.

  In addition to the roller pump and the ring pump, finger pumps that are often used for medical devices are known. In this finger pump, a tube is arranged in a gap between a large number of rollers and a tube pressure closing member, and the tubes are sequentially closed by rotating the large number of rollers while rotating them. Therefore, a complicated configuration having a large number of rollers is required, and a load is applied to the tube as the tube is sequentially pressed and pulled in one direction by the large number of rollers.

  The present invention has been made to solve the above-described problems, and it is an object of the present invention to provide a tube pump that can easily replace a tube with a simple configuration and can reduce a load caused by the tube being pulled. And

  The tube pump of the present invention is a rotatable arc member having a circular arcuate inner wall surface, a tube disposed along the inner wall surface, and a tube disposed between the inner wall surface. A tube pump that includes a rotating body and a drive mechanism that drives the rotating body, and that sequentially closes the tube against the inner wall surface by the rotational motion of the rotating body and delivers fluid in the tube. The rotating body includes a rotor to which a rotational force is applied by the drive mechanism, and a plurality of free-running arc members provided freely between the rotor and the tube, wherein the free-running arc member is The tube is closed along the inner wall surface by receiving a pressing force due to the rotation of the rotor and moving so that the portion receiving the pressing force is pushed to the outermost peripheral position. To.

  In this tube pump, the loose circular arc member has a long hole extending along a radial direction of the inner wall surface, and is supported rotatably around a support pin provided in the long hole. It is preferable to move along the radial direction and rotate around the support pin.

  In this tube pump, it is preferable that the rotor has a polygonal shape and the curvature radius of the inner wall surface of the fixed arc member is increased to reduce the curvature of the tube.

  In this tube pump, the fixed circular arc member includes a first fixed circular arc member and a second fixed circular arc member each having an arcuate inner wall surface, and the tube includes the first fixed circular arc member. A first tube and a second tube respectively disposed along the inner wall surface of the arc member and the second fixed arc member and connected to the fluid inlet end and the fluid outlet end, respectively. The rotating body includes a first rotating body that press-closes the first tube and the second tube with respect to inner wall surfaces of the first fixed arc member and the second fixed arc member, and By having a second rotating body and rotating the rotors of the first rotating body and the second rotating body with a rotational phase difference of 180 degrees relative to each other, the free circular members are allowed to idle, It is preferable to reduce the pulsating flow.

  According to the tube pump of the present invention, the tube is closed by the floating circular member along the inner wall surface of the fixed circular member, so that the tube can be closed by a few constituent members, and the tube can be replaced. At this time, since the tube may be disposed between the arcuate inner wall surface and the floating arc member, a complicated operation of winding the tube in a U shape along the ring is not required. Therefore, the tube can be easily replaced with a simple configuration. Further, since the tube is only pushed against the inner wall surface and is not pulled in one direction, the load on the tube can be reduced.

(A) is a front view of the tube pump which concerns on the 1st Embodiment of this invention, (b) is a perspective view of the tube pump when the tube and the floating arc member are not arrange | positioned. (A) thru | or (c) is a front view for demonstrating operation | movement of the tube pump. The front view of the tube pump which concerns on the 2nd Embodiment of this invention. (A) is a perspective view of the tube pump which concerns on the 3rd Embodiment of this invention, (b) is the figure which showed the function structure of the tube pump, (c) is a perspective view of the rotor with which the tube pump is provided. .

  A tube pump according to a first embodiment of the present invention will be described with reference to FIGS. 1 (a) and 1 (b) and FIGS. 2 (a) to 2 (c). As shown in FIGS. 1A and 1B, a tube pump 1 includes a fixed arc member 2 having an arcuate inner wall surface 2a equivalent to a semicircle, and a tube disposed along the inner wall surface 2a. 3, a rotatable rotating body 4 disposed so as to sandwich the tube 3 between the inner wall surface 2 a thereof, and a drive mechanism 5 for driving the rotating body 4. The rotating body 4 includes a rotor 6 positioned at the center of the arc of the inner wall surface 2a, and first and second free-moving arc members 7 and 8 that are provided between the rotor 6 and the tube 3 so as to be freely movable. And have. The rotor 6 is attached to the rotating shaft of the drive mechanism 5 and is given a rotational force. The first and second floating circular members 7 and 8 are formed in a substantially arch shape as a whole, and are positioned on the fluid inflow side and the fluid discharge side of the tube pump 1 in the inner wall surface 2a of the fixed circular member 2, respectively. doing. The first floating circular arc member 7 has a long hole 7a extending along the radial direction of the inner wall surface 2a at one end on the fluid inflow side of the tube pump 1, and the second floating circular arc member 8 has the same shape. An elongated hole 8a is provided at one end of the tube pump 1 on the fluid discharge side. Support pins 7b and 8b are inserted into the long holes 7a and 8a, respectively, and the first and second floating circular arc members 7 and 8 are respectively inserted in the radial direction of the inner wall surface 2a by the support pins 7b and 8b. The support pins 7b and 8b are supported so as to be rotatable.

  The tube pump 1 includes a fixed member 9 having an arcuate inner wall surface 9a equivalent to a semicircle having a diameter smaller than the inner wall surface 2a of the fixed arc member 2, and the fixing member 9 and the fixed arc member 2 on one side. And an attachment substrate 10 to be attached. The fixing member 9 fixes the portion of the tube 3 on the fluid inflow side and the fluid discharge side with the fixed arc member 2. The mounting substrate 10 has the drive mechanism 5 attached to the other surface side. The fixed arc member 2 and the fixed member 9 make the inner wall surface 2a and the inner wall surface 9a face each other, and the rotating body 4 is disposed in a region surrounded by the inner wall surfaces 2a and 9a. The drive mechanism 5 rotates the rotor 6 to cause the first and second free-running circular members 7 and 8 to move freely, so that the tubes 3 arranged along the inner wall surface 2a of the fixed circular-arc member 2 are sequentially closed. Then, the fluid in the tube 3 is delivered.

  The fixed arc member 2 is formed of a molded product such as ABS resin, for example. In addition to the inner wall surface 2a, the inner wall surface 2a and a first side surface 2b connected on the fluid inflow side of the tube pump 1, A wall surface 2a and a second side surface 2c connected on the fluid discharge side of the tube pump 1; The first side surface 2b and the second side surface 2c sandwich the fluid inflow side and fluid discharge side portions of the tube 3 between the first side surface 9b and the second side surface 9c (described later) of the fixing member 9, respectively. It is fixed with. The fluid inflow side and fluid discharge side portions of these tubes 3 are positioned on a straight line. Therefore, when the tube is removed in tube replacement, if the tube 3 is pulled along the straight line, the tube 3 can be easily removed from the fixed arc member 2, so that the tube is wound around an eccentric ring, for example. The tube 3 can be easily removed as compared with FIG. Moreover, it is preferable that the fixed arc member 2 is detachably attached to the attachment substrate 10 using a hinge. In this way, the fixed circular member 2 can be easily detached from the mounting substrate 10 to separate the inner wall surface 2a from the first and second floating circular members 7 and 8, so that a space can be provided between them. It becomes easy to replace the tube 3.

  The tube 3 is made of a flexible material such as rubber or synthetic resin so as to be able to withstand the press-closing by the first and second free-running circular members 7 and 8, and has a restoring property. Therefore, when the tube 3 is closed by the first and second free-running circular members 7 and 8, the cross-sectional area of the internal flow path becomes a closed state, and the first and second free-running circles. When not closed by the isolated members 7 and 8, the closed state is released and the original state is restored. For example, a lubricant may be applied to the surface of the tube 3 in order to reduce friction with the first and second free-running circular members 7 and 8.

  The rotor 6 has a substantially elliptical shape, and causes the first and second free-running circular members 7 and 8 to move freely by its own rotation. The shape of the rotor 6 is not limited to a substantially elliptical shape, and one end on the fluid inflow side and the other end on the fluid discharge side of the tube 3 disposed along the inner wall surface 2a (hereinafter simply referred to as one end and the other end of the tube 3). Can be formed in various shapes that can be simultaneously closed via the first and second floating circular arc members 7 and 8.

  The first and second free-running circular members 7 and 8 are made of a material having a small friction coefficient in order to prevent the tube 3 from being damaged, and are made of, for example, a fluororesin-based synthetic resin molded product. The first free-running circular arc member 7 has an arcuate inner peripheral surface 7c and an outer peripheral surface 7d corresponding to a 1/4 circle that rises to the right, and the second free-circular arc member 8 is a 1/4 that falls downward. An arc-like inner peripheral surface 8c and an outer peripheral surface 8d corresponding to a circle are provided. In the figure, inner peripheral surfaces 7c and 8c face the rotor 6 and one end thereof is pressed by both ends of the rotor 6, and the outer peripheral surfaces 7d and 8d face the tube 3 and one end thereof is one end of the tube 3 and The other end is pressed.

  The first free-running circular member 7 has a connection surface 7e that connects the inner peripheral surface 7c and the outer peripheral surface 7d at the rear end in the rotational direction of the rotor 6, and the connection surface 7e is formed on the inner peripheral surface 7c. It is inclined so that the angle formed by and becomes an acute angle. The second idle member 8 has a connection surface 8e that connects the inner peripheral surface 8c and the outer peripheral surface 8d at the front end in the rotational direction of the rotor 6, and this connection surface 8e is formed by the inner peripheral surface 8c. It is inclined so that the angle becomes obtuse. By configuring in this way, the rotor 6 is not caught on the front end portion of the second floating arc member 8.

  The drive mechanism 5 is composed of, for example, a small DC motor, and only the rotation shaft of the drive mechanism 5 is particularly shown in the drawing. For example, when it is necessary to precisely control the operation of the tube pump 1 in order to adjust the flow rate of the fluid in the tube 3, a stepping motor or a servo motor may be used as the drive mechanism 5. The drive mechanism 5 may be supplied with power from a DC power supply outside the tube pump 1 or may be supplied from a battery built in the tube pump 1. In this example, the rotation shaft of the drive mechanism 5 is assumed to rotate clockwise.

  In addition to the inner wall surface 9a, the fixing member 9 is connected to the inner wall surface 9a and a first side surface 9b connected to the fluid inflow side of the tube pump 1, and to the inner wall surface 9a and the fluid discharge side of the tube pump 1. And a second side surface 9c. The inner wall surface 9a forms a space for allowing the rotor 6 to freely rotate.

  The mounting substrate 10 is a substrate having a rectangular shape, and holds the fixed arc member 2, the fixing member 9, and the drive mechanism 5. In the vicinity of the center of the mounting substrate 10, a through hole 11 for inserting the rotation shaft of the drive mechanism 5 is provided. In addition, it fixes by forming a recessed part in the one surface side of the member (base member) used as the base of the tube pump 1 without using the fixed arc member 2, the fixing member 9, and the attachment board | substrate 10 like this embodiment. A configuration corresponding to the circular arc member 2 may be adopted.

  Next, the operation of the tube pump 1 having the above-described configuration will be described with reference to FIGS. 1 (a) and 2 (a) to (c). As an initial state, in the state of the tube pump 1 as shown in FIG. 1A, both ends of the rotor 6 press one end of the first and second free-running circular members 7 and 8. Therefore, the first and second free-running circular members 7 and 8 that have received the pressing force from the rotor 6 slightly move outward along the radial direction of the inner wall surface 2a, and one end thereof is pushed to the outermost peripheral position. Be done. Accordingly, one end of the tube 3 is pressed against the inner wall surface 2 a by one end of the first floating circular member 7, and the other end of the tube 3 is internally connected by one end of the second floating circular member 8. The wall 2a is closed.

  Next, as shown in FIG. 2 (a), when the rotor 6 is rotated clockwise by 45 degrees from the initial state, one end of the rotor 6 is moved from the initial state to the inner peripheral surface 7c of the first floating circular arc member 7. It slides on and presses the central part of the inner peripheral surface 7c. At this time, since one end of the first floating circular member 7 is not pressed from the rotor 6, the first floating circular member 7 moves slightly inward along the radial direction by the restoring force from one end of the tube 3. To do. Further, the central portion of the first free-running arc member 7 is rotated counterclockwise around the support pin 7 b by the pressing force from the rotor 6 and pushed to the outermost peripheral position. Accordingly, a portion downstream of the tube 3 by 45 degrees of rotation of the rotor 6 from the one end of the tube 3 is closed with respect to the inner wall surface 2 a by the central portion of the first floating arc member 7. Since the second free-running arc member 8 is not pressed from the rotor 6, it moves slightly inward along the radial direction by the restoring force from the other end of the tube 3 and rotates clockwise around the support pin 8 b. To do.

  Next, as shown in FIG. 2 (b), when the rotor 6 further rotates clockwise by 45 degrees, one end of the rotor 6 further slides on the inner peripheral surface 7 c of the first floating circular member 7. Then, the other end of the first floating circular arc member 7 is pressed. At this time, since one end of the first and second floating circular members 7 and 8 is not pressed from the rotor 6, the first and second floating circular members 7 and 8 are connected to one end and the other end of the tube 3. It moves slightly inward along the radial direction due to the restoring force. Further, the other end of the first free-running circular member 7 is rotated counterclockwise around the support pin 7b by the pressing force from the rotor 6 and pushed to the outermost peripheral position, so that the first free-running circular member The connection surface 7e of 7 presses the connection surface 8e of the second floating circular arc member 8 and lifts the other end of the second floating circular arc member 8 toward the inner wall surface 2a. Therefore, the other end of the second floating circular arc member 8 rotates clockwise around the support pin 8b and is pushed to the outermost peripheral position, so that the central portion between the one end and the other end of the tube 3 (hereinafter simply referred to simply as “the other end”). The tube 3 is referred to as a central portion) and is closed with respect to the inner wall surface 2a. Thus, since the tube 3 can be continuously closed without interrupting the press-closing of the central portion of the tube 3, fluctuations in the amount of fluid discharged can be suppressed and the pulsating flow can be reduced.

  Next, as shown in FIG. 2 (c), when the rotor 6 further rotates clockwise by 45 degrees, one end of the rotor 6 slides on the inner peripheral surface 8c of the second floating circular arc member 8. The center part of the inner peripheral surface 8c is pressed. At this time, the second free-running arc member 8 slightly moves outward along the radial direction by the pressing force from the rotor 6 received by the central portion thereof. Further, the central portion of the second floating arc member 8 is rotated clockwise around the support pin 8 b by the pressing force from the rotor 6 and pushed to the outermost peripheral position. Accordingly, a portion downstream of the central portion of the tube 3 by 45 degrees of rotation of the rotor 6 is pressure-closed with respect to the inner wall surface 2 a by the central portion of the second floating circular arc member 8. The first free-running circular member 7 is not pressed from the rotor 6 but slightly moves outward along the radial direction by the restoring force from the central portion of the tube 3 and rotates clockwise around the support pin 7b. . When the rotor 6 further rotates clockwise by 45 degrees, the state returns to the state shown in FIG. 1A and the above operation is repeated.

  As described above, according to the tube pump 1 of the present embodiment, the tube 3 is pressure-closed along the inner wall surface 2a of the fixed circular arc member 2 by the first and second floating circular arc members 7 and 8, and thus is few. The tube 3 can be closed by the constituent members, and when replacing the tube, the tube 3 is disposed between the arcuate inner wall surface 2a and the first and second floating arcuate members 7 and 8. Therefore, a complicated operation of winding the tube 3 along the ring in a U shape is not necessary. Therefore, the tube 3 can be easily replaced with a simple configuration. Further, since the tube 3 is only pushed against the inner wall surface 2a and is not pulled in one direction, the load on the tube 3 can be reduced.

  Next, a tube pump according to a second embodiment of the present invention will be described with reference to FIGS. 3 (a) and 3 (b). In the following, differences from the first embodiment will be described. As shown to Fig.3 (a), the tube pump 1a makes the curvature radius R of the inner wall surface 2a of the fixed arc member 2 larger than the time of the said 1st Embodiment. That is, the inner wall surface 2a of the tube pump 1a is, for example, an arcuate inner wall surface 2a corresponding to a quarter circle, thereby reducing the curvature of the inner wall surface 2a. The rotor 6 is formed in a polygonal shape so that one end and the other end of the tube 3 arranged along the inner wall surface 2a can be simultaneously closed.

  According to the tube pump 1a of this embodiment, the curvature of the inner wall surface 2a is reduced by increasing the curvature radius R of the inner wall surface 2a of the fixed arc member 2 and is arranged along such an inner wall surface 2a. The bending of the tube 3 is also reduced. Therefore, the load applied to the tube 3 can be reduced and the life of the tube 3 can be extended. In the present embodiment, a space is provided between the first and second side surfaces 2b, 2c of the fixed arc member 2 and the first and second side surfaces 9b, 9c of the fixing member 9, and the tube 3 The fluid inflow side and fluid ejection side portions may be freely movable.

  Next, a tube pump according to a third embodiment of the present invention will be described with reference to FIGS. As shown in FIGS. 4A and 4B, the tube pump 1b is formed by connecting two tube pumps P1 and P2 having the same configuration in parallel to each other. Each of the tube pumps P1, P2 may have a configuration equivalent to that of the tube pump 1 of the first embodiment or the tube pump 1a of the second embodiment.

  Specifically, the tube pump P <b> 1 includes a base member 21, a tube 31, a rotating body 4, and a drive mechanism 5, and the rotating body 4 includes a rotor 61 and first and second free-running arcs. Members 7 and 8. Similarly, the tube pump P2 includes a base member 22, a tube 32, a rotating body (not shown), and a drive mechanism 5. The rotating body (not shown) includes the rotor 62, the first and second elements. And an idle circular member (not shown). The base members 21 and 22 have a configuration in which a concave portion is formed on one side of the base members 21 and 22 and correspond to the fixed arc member 2, and are fixed in a state where the other sides are in contact with each other. The tubes 31 and 32 have their fluid inlet end and fluid outlet end connected to each other by the connecting portion 12. As shown in FIG. 4 (c), the rotor 61 of the tube pump P1 and the rotor 62 of the tube pump P2 are commonly attached to the rotating shaft of the drive mechanism 5 so as to have a rotational phase difference of 180 degrees. Yes.

  By arranging the rotors 61 and 62 as described above, a first operation for simultaneously pressing and closing one end and the other end of the tube 31 and a second operation for simultaneously pressing and closing one end and the other end of the tube 32 are performed. It can be done alternately. Thereby, since it is avoided to perform the first operation and the second operation at the same time, a sudden change in the amount of fluid discharged from the tube pump 1b can be prevented and the pulsating flow can be reduced.

  In addition, you may use the said fixed circular member 2, the fixing member 9, and the attachment board | substrate 10 without using the base members 21 and 22 like this embodiment. At this time, the mounting substrate 10 becomes a common member of the tube pumps P1 and P2, and may be disposed between the tube pump P1 and the tube pump P2.

  The present invention is not limited to the configuration of the above embodiment, and various modifications can be made without departing from the spirit of the invention. For example, in the above-described embodiment, the number of the plurality of idle circular members is two. However, if the tube 3 can be closed along the inner wall surface 2a, the number of the plurality of idle circular members is three or more. It does not matter. Moreover, although the example which connected two tube pumps P1 and P2 in parallel in 3rd Embodiment was shown, the rotational phase difference of a rotor may be made equal and 3 or more tube pumps may be connected in parallel. In this way, the pulsating flow of the tube pump can be further reduced.

DESCRIPTION OF SYMBOLS 1 Tube pump 2 Fixed circular arc member 2a Inner wall surface 3 Tube 4 Rotating body 5 Drive mechanism 6 Rotor 7 1st circular arc member (floating circular arc member)
8 Second idle circle member (idle circle member)

The tube pump of the present invention is a rotatable arc member having a circular arcuate inner wall surface, a tube disposed along the inner wall surface, and a tube disposed between the inner wall surface. A tube pump that includes a rotating body and a drive mechanism that drives the rotating body, and that sequentially closes the tube against the inner wall surface by the rotational motion of the rotating body and delivers fluid in the tube. The rotating body includes a rotor to which a rotational force is applied by the drive mechanism, and a plurality of free-running arc members provided freely between the rotor and the tube, wherein the free-running arc member is by the inner peripheral surface of the free Doenko member is pressed by the rotor, it receives the pressing force due to the rotation of the rotor, to loose as site which receives the pressing force is pushed on the outermost circumference position By, pressing and closing the tube along the inner wall surface, one of the floating diene member of the plurality of idler diene member, the rotation direction rear end of the rotor, the inner periphery of the free Doenko member A connecting surface that is inclined so that an angle formed with the surface is an acute angle, and the other free circular arc member of the plurality of free circular arc members is arranged at the forward end of the rotor in the rotational direction. wherein the angle formed between the inner peripheral surface of the member to have a connecting surface which is inclined so that an obtuse angle.

In this tube pump, the rotor has a polygonal shape, it is preferable to reduce the curvature of the tube and with the inner wall surface of the quarter circle equivalent circular arc-shaped of the fixing diene member.

Claims (4)

A fixed circular arc member having an arcuate inner wall surface, a tube disposed along the inner wall surface, a rotatable rotating body disposed so as to sandwich the tube between the inner wall surface, and the rotation A tube pump that sequentially closes the tube against the inner wall surface by a rotational movement of the rotating body and sends out the fluid in the tube.
The rotating body includes a rotor to which a rotational force is applied by the driving mechanism, and a plurality of floating arcuate members that are freely provided between the rotor and the tube,
The floating arc member receives a pressing force due to the rotation of the rotor and moves so that the portion receiving the pressing force is pushed to the outermost peripheral position, thereby pressing and closing the tube along the inner wall surface. A tube pump characterized by that.   The floating arc member has a long hole extending along a radial direction of the inner wall surface, and is supported so as to be rotatable around a support pin provided in the long hole, and in the radial direction by the pressing force. The tube pump according to claim 1, wherein the tube pump moves along the support pin and rotates around the support pin.   The tube pump according to claim 1 or 2, wherein the rotor has a polygonal shape, and the curvature radius of the inner wall surface of the fixed arc member is increased to reduce the curvature of the tube. The fixed arc member has a first fixed arc member and a second fixed arc member each having an arcuate inner wall surface,
The tubes are arranged along the inner wall surfaces of the first fixed arc member and the second fixed arc member, respectively, and are connected to the fluid inlet end and the fluid outlet end, respectively. A tube and a second tube;
The rotating body includes a first rotating body that press-closes the first tube and the second tube with respect to inner wall surfaces of the first fixed arc member and the second fixed arc member, and A second rotating body,
The pulsating flow is reduced by rotating the rotors of the first rotating body and the second rotating body with a rotational phase difference of 180 degrees from each other to cause the floating arc members to move freely. The tube pump according to any one of claims 1 to 3.

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