JP6512822B2 - Tube pump - Google Patents

Description

  The present invention relates to a peristaltic tube pump which discharges liquid by opening and closing a space in the tube, and more particularly to a tube pump which continuously discharges a fixed amount of liquid.

DESCRIPTION OF RELATED ART Conventionally, the roller type tube pump (for example, patent document 1) which deform | transforms flexible tubes, such as a rubber tube, with a roller, and the finger type tube pump (for example, patent document 2) which deforms with a finger are known.
The tube pump sucks the liquid into the tube by sequentially pressing and opening the tube with rollers and fingers and sequentially changing the position of opening and closing the inside of the tube and discharging it. The tube pump is excellent in that it does not require sealing and there is no stagnant flow.
For this reason, tube pumps are widely used in printers, infusion pumps, detergent supply pumps and the like. That is, a tube pump is widely used in mass production plants, laboratories, etc. as a pump for discharging and transferring a chemical solution, an electrolytic solution, an additive, an adhesive, and various other liquids.

In such a tube pump, for example, a tube pump using a tube made of a fluorine resin having high chemical resistance performance such as polytetrafluoroethylene (PTFE) is required as a tube capable of discharging an adhesive, a drug and the like.
By the way, since a fluorine resin tube is less flexible than a rubber tube or the like, a large force is required to crush the tube. For this reason, a roller type tube pump has been used.

JP 2012-87637A JP, 2010-248975, A

However, in the roller type tube pump, there is a problem that the discharge amount is small when using a tube made of fluorocarbon resin.
That is, a roller-type tube pump draws a tube sequentially with a roller to deliver a liquid. For this reason, when the tube crushed by the roller is restored, the roller before and after the restored portion is also crushed by the roller, so the front and back portions do not contribute to the restoration, and only the both end portions of the crushed tube in the cross sectional direction It will be.
In particular, since the fluorocarbon resin has a small restoring force, the tube after the roller passes is not sufficiently restored only at the both end portions of the tube in the section in the cross sectional direction of the tube, and the suction amount which can be sucked into the restored space is also It can not increase, and as a result, there is a problem that it is difficult to increase the discharge amount of the tube pump.

On the other hand, in the finger type tube pump, by arranging the fingers apart in the direction along the tube, the tube portion which can not be crushed by the finger can be provided between the places where the tube is crushed. For this reason, when restoring a portion crushed by a finger in the tube, not only both end portions in the cross-sectional direction of the tube but also a portion of the tube not crushed by the fingers before and after the portion crushed by the finger contributes to the restoration Do. Therefore, the tube crushed by the finger can be easily restored, and the amount of suction that can be sucked into the restored space can be increased, and as a result, the discharge amount of the tube pump can be increased.
However, in the finger type tube pump, a plurality of fingers must be driven simultaneously to crush the tube, and the force for crushing the tube is smaller than that of a roller type tube pump having the same motor size and pump size. For this reason, in order to squeeze a small flexible tube made of fluorine resin with a finger reliably, there is a problem that a motor etc. is enlarged and miniaturization of the tube pump is difficult.

  An object of the present invention is to provide a tube pump which can increase the amount of discharge using a tube having a low flexibility and a small restoring force, and which can be compactly manufactured while being finger-type.

The tube pump according to the present invention has a tube whose one end side is a suction side and whose other end side is a discharge side, a base member arranged along the tube, and an opposing arrangement to the base member across the tube. In the tube pump provided with at least three or more provided finger members and a drive mechanism for driving each finger member, the finger member presses the tube when driven by the drive mechanism. folding comprises a tube press bent portion of the flow path the close in the tube Te, the drive mechanism, the respective finger members, each tube press bent portion toward the discharge side of the suction side of the tube is the The tube is driven to move sequentially to a position where it is pressed and bent, and the tube is a tube of a finger member in the base member. When pressed in 圧折 curved portion, characterized in that the tube receiving member to deform along with the tube supporting bending of the tube is provided.

In the present invention, the finger member is driven by the drive mechanism, and the tube is pressed by the tube pressing and bending portion of the finger member. Under the present circumstances, since the tube receiving member which receives a tube can be deformed if stress from a tube pressure bending part is added via the tube, the tube is easy to be bent in the position where the tube pressure bending part abuts Become. And bending of a tube can be performed by small power compared with the case where a tube is crushed. For this reason, even in the case of using a fluorocarbon resin tube, the tube can be bent using a finger whose pressing force is smaller than that of the roller. Therefore, even in the case of using a tube of a material with low flexibility, for example, a tube made of fluorine resin, it is not necessary to use a large motor, and the tube pump can be miniaturized while using a finger type.
Furthermore, even in the case of using a tube of a material with a small resilience, for example, a tube made of fluorine resin, the tube pressing and bending portions of the plurality of fingers can be arranged apart from each other because the tube presses the tube by the fingers. Therefore, the bent portion of the tube which is pressed and bent by the tube pressing and bending portion can also be arranged apart in the direction along the tube. For this reason, the tube portion which is not pressed between the bent portions of the tube can be secured, and the tube portion which is not crushed by the finger also contributes to the restoration, so the tube which is crushed by the finger becomes easy to be restored. The amount of suction that can be made can also be increased, and as a result, the discharge of the tube pump can also be increased.

In the tube pump of the present invention, preferably, the tube receiving member is a rubber sheet having a Shore A of 50 or more and 100 or less.
When a rubber sheet having a hardness of 50 or more and 100 or less represented by Shore A is used as the tube receiving member, the tube can be easily bent when pressed by the tube pressing and bending portion. That is, when the tube is bent at the tube pressing and bending portion, only the portion pressed by the tube pressing and bending portion is crushed and the other portion is not crushed at the tube receiving member in order to bend the tube. It bends easily.

In the tube pump of the present invention, it is preferable that the tube pressing and bending portion includes a protrusion formed in an arc shape in cross section, and the arc surface of the protrusion is a curved surface having a curvature radius of 3.0 mm or less.
If the tube pressing and bending portion is provided with a protrusion having an arc-shaped cross section, and the arc surface of the protrusion is a curved surface having a radius of curvature of 3.0 mm or less, machining is easy and the tube is easily pressed and folded. I can sing.

In the tube pump of the present invention, the tube is preferably a tube made of a fluorocarbon resin.
By using a fluorocarbon resin tube, it is possible to discharge various types of liquids such as adhesives and drugs.

  In the tube pump according to the present invention, the drive mechanism includes a motor and a drive shaft rotated by the motor, and the finger member rotates integrally with a thin plate-like finger plate and the drive shaft. The finger plate includes a fixed portion fixed to the housing side of the tube pump, a moving portion connected to the fixed portion via the first hinge portion, and 2) A drive shaft portion connected via a hinge portion is integrally formed, and the cam is an eccentric cam fixed at a position where the drive shaft is eccentric from the center of the cam; The tube pressing and bending portion is formed in the moving portion so as to be rotatably supported by the provided hole, and in the first hinge portion, the tube pressing and bending portion moves forward and backward with respect to the tube. Possible The second hinge portion is a direction perpendicular to the moving direction of the moving portion by the first hinge portion in a plane orthogonal to the driving shaft with respect to the moving portion. Preferably, it is formed movable.

In the present invention, the finger plate is made of one part and can be manufactured inexpensively, so that, for example, even when about 10 to 20 finger plates are installed, an increase in the part cost can be suppressed.
Furthermore, since the finger member uses a finger plate integrally formed including the first hinge portion and the second hinge portion, no rattling occurs during the movement operation of the tube pressing and bending portion, and the discharge accuracy is achieved. Can be improved.

  In the tube pump of the present invention, the tubes are configured to include a first tube and a second tube provided in parallel to each other, and the tube receiving member is a first tube receiving member disposed along the first tube. And a second tube receiving member disposed along the second tube, wherein the first tube receiving member and the second tube receiving member are disposed opposite to each other across the first tube and the second tube. The tube pressing and bending portion of each finger member is disposed between the first tube and the second tube, and the driving mechanism is configured such that the tube pressing and bending portion presses the first tube, and A position at which the first tube is bent between the first tube receiving member and the tube pressing and bending portion presses the second tube, and the second tube is bent. Between a position in which folding the second tube between the cube receiving member, it is preferable to drive the respective finger member so as to reciprocate.

Here, as the tube, two tubes may be provided independently from the liquid supply side to the liquid discharge side, as it is sufficient if the portion pressed by the tube pressing and bending portion is two tubes. The middle part may be branched into two tubes, and the ends of the two tubes may be connected by a connector or the like and connected to one tube.
In the present invention, two tubes are disposed in the portion where the finger members are disposed, and a plurality of finger members in which tube pressing and bending portions are disposed between the two tubes are provided. Then, since the tube pressing and bending portion of the finger member reciprocates between the positions pressing the respective tubes by the drive mechanism, the two tubes are alternately pressed and bent, and the flow passage in one of the tubes Movement of one finger member, closing the flow path in the other tube, and opening the flow path in the other tube, and closing the flow path in the other tube. Can be realized by

For this reason, although the opening and closing operation of the two tubes is 180 degrees out of phase, the liquid can be sequentially sent and discharged for each tube.
Further, by connecting the discharge side of the two tubes to one tube, the flow rate of the liquid joined from the two tubes to one tube can be maintained substantially constant. Therefore, the pulsation of the discharge liquid can be suppressed, and the liquid can be discharged continuously.
And, since two tubes can be pressed and bent by one finger member, it is possible to prevent the increase in the number of parts even though it is a finger type tube pump, and make it a compact and inexpensive tube pump. Can.

It is a front view showing a tube pump of one embodiment of the present invention. It is a side view showing the tube pump. It is a perspective view showing the tube pump. It is a front view which shows the pump part of the said tube pump. It is a side view which shows the pump part of the said tube pump. It is a top view which shows the said tube pump. It is a plane sectional view showing an important section of the tube pump. It is a front view showing the tube for the tube pump. It is a top view which shows the finger board of the said tube pump. It is sectional drawing which shows the tube press bending part of the said finger board. It is a plane sectional view showing an important section of the tube pump. It is a plane sectional view showing an important section of the tube pump. It is a plane sectional view showing an important section of the tube pump. It is a perspective view which shows the tube holder of the modification of this invention. It is sectional drawing which shows the tube holder of the modification of this invention. It is a plane sectional view showing an important section of a tube pump using a finger board of a modification of the present invention.

Below, the structure of the tube pump which concerns on one Embodiment of this invention is demonstrated.
A front view showing a finger type tube pump 1 of the present embodiment is shown in FIG. 1, a side view of the tube pump 1 is shown in FIG. 2, and a perspective view is shown in FIG.
The tube pump 1 includes a base 2 and a pair of covers 3 having a U-shaped flat cross section. The base 2 and the cover 3 constitute a casing of the tube pump 1.
In the housing, as shown in FIGS. 4 and 5, a motor 4 and a pump unit 10 are provided.

  The pump unit 10 is provided with a pair of end plates 11A and 11B which are flat and substantially rectangular and disposed apart in the vertical direction. Between the end plates 11A and 11B, four support shafts 12 arranged at the four corners of each end plate 11A and 11B are disposed, and each end plates 11A and 11B are in contact with the end portions of the support shaft 12 It is fixed by a screw.

A motor flange 13 is attached to the lower end plate 11B. The motor 4 is attached to the motor flange 13. The motor 4 uses a control motor such as a stepping motor or a servomotor.
The drive shaft 5 is connected to the output shaft of the motor 4 via a coupling disposed in the motor flange 13.
The drive shaft 5 is a spline shaft as described later, and is rotatably supported by the end plates 11A and 11B via a ball bearing.
Thus, the motor 4 and the drive shaft 5 constitute the drive mechanism of the present invention.

A mounting block 15 is fixed to the motor flange 13 and the upper end plate 11A.
Each mounting block 15 is formed with a screw hole, and a screw is screwed into the screw hole from the outside through the cover 3 to attach each mounting block 15, that is, the pump portion 10 to the cover 3.
The cover 3 is also attached with a connector 16 for connecting a signal line for controlling the motor 4 to the controller.

One axial arm 21 and one receiving arm 22 are attached to the lower surface of the end plate 11A and the upper surface of the end plate 11B, respectively.
As shown in FIG. 6, the shaft arm 21 and the receiving arm 22 are rotatably attached to the end plates 11A and 11B via the arm shaft 23 at the base end side.
Therefore, when the tube pump 1 is viewed from the front, as shown in FIG. 3, the shaft arm 21 is provided on the right side of the tube pump 1 vertically at a predetermined distance, and the receiving arm 22 is vertically fixed on the left side. A pair is provided at intervals.

Between each axial arm 21 and the receiving arm 22, as shown in FIG. 6, the coiled spring 24 as an urging means is interposed. For this reason, in the free state, the shaft arm 21 and the receiving arm 22 are moved by the coil spring 24 to a position in contact with the support shaft 12, and the distal end sides are separated from each other.
As shown also in FIG. 3, upper and lower flange portions 261 of the toggle plate 26 are attached to the tip of each axial arm 21 via the toggle plate shaft 25. For this reason, the toggle plate 26 is rotatably attached to the shaft arm 21.

As shown in FIGS. 3 and 6, the toggle outer shaft 27 is rotatably attached between the flanges 261 of the toggle plate 26. The toggle receiving shaft 29 is attached to the toggle outer shaft 27 via the three connecting rods 28. At the upper and lower ends of the toggle receiving shaft 29, locking portions 291 of the thin shaft are protruded.
On the other hand, at the tip of the receiving arm 22, a locking groove 221 capable of locking the locking portion 291 is formed.
Therefore, as in the general toggle mechanism, when the toggle plate 26 is moved to the receiving arm 22 side with the locking portion 291 of the toggle receiving shaft 29 locked to the locking groove 221 of the receiving arm 22, FIG. As shown in FIG. 5, the toggle outer shaft 27 moves outward beyond the toggle plate shaft 25, and the toggle arm connected to the toggle outer shaft 27 via the connecting rod 28 with the shaft arm 21 to which the toggle plate shaft 25 is attached. The distance between the shaft 29 and the receiving arm 22 locked is shortened. For this reason, each axial arm 21 and the receiving arm 22 compress the coil spring 24 of FIG. 7 from the state where the tip end side of FIG. 6 is open, and the respective axial arm 21 and the receiving arm 22 are arranged almost parallel. , Is maintained in this state.

The first base member 31 is attached between the shaft arms 21. The second base member 32 is attached between the receiving arms 22.
Each of the base members 31 and 32 is formed of a rectangular parallelepiped metal block extended in the vertical direction. A first tube receiving member 310 and a second tube receiving member 320 are attached to the surfaces of the base members 31 and 32 facing each other.

The respective tube receiving members 310 and 320 support the bending of the tube 40 by deforming together with the tube 40 when the tube 40 (intermediate tubes 42A and 42B) described later is pushed by the tube pressing bending portion 632 of the finger member 60 It is
Each of the tube receiving members 310 and 320 in the present embodiment is formed of a urethane rubber sheet (rubber sheet) having a Shore A of 50 or more and 100 or less. That is, the tube receiving members 310 and 320 have a hardness equal to or higher than a predetermined hardness (for example, Shore A is 50), so that the amount of crushing of places other than those pressed by the tube pressing and bending portion 632 can be reduced. Support can be continued. In addition, by having a hardness equal to or less than a predetermined hardness (for example, Shore A is 100), the crushing amount of the place pressed by the tube pressing and bending portion 632 becomes large, and the tube 40 can be sunk. Therefore, when the tube 40 is disposed along the tube receiving members 310 and 320 and a portion of the tube 40 is pressed by the tube pressing and bending portion 632, the portion pressed by the tube pressing and bending portion 632 in the tube 40 is the tube receiving member While 310 and 320 also collapse, the amount of collapse of the tube receiving members 310 and 320 around them is suppressed. Therefore, in the tube 40, the portion pressed by the tube pressing and bending portion 632 is bent, and the flow path in the tube 40 is also closed.

On the other hand, when a sheet with a small Shore A is used as the tube receiving members 310 and 320, when the tube 40 is pressed by the tube pressing and bending portion 632, only the pressing portion of the tube pressing and bending portion 632 in the sheet is used. Also, the front and back portions are also crushed, and a relatively wide range of the tube 40 will crush the sheet. In this case, the tube 40 is not broken, and the tube 40 is crushed including the regions before and after pressed by the tube pressing and bending portion 632. For this reason, when the tube 40 is made of a material that is difficult to crush like a fluorine resin, the flow path in the tube 40 can not be closed without completely crushing the tube 40, and it can not function as a tube pump .
In addition, when a high hardness sheet having a large Shore A is used as the tube receiving members 310 and 320, when the tube 40 is pressed by the tube pressing and bending portion 632, the entire tube receiving members 310 and 320 are not crushed so much. The tube 40 does not bend, but squeezes the tube 40 including the area before and after pressed by the tube pressing and bending portion 632. For this reason, in the case where the tube 40 is made of a material that is difficult to crush like a fluorine resin, the flow path in the tube 40 can not be closed without completely crushing the tube 40, and it can also function as a tube pump Can not.
Therefore, it is preferable that the tube receiving members 310 and 320 have a predetermined range of hardness.
The tube receiving members 310 and 320 are not limited to urethane rubber sheets, but may be other rubber sheets (resin sheets), or even a plurality of sheets of paper of a predetermined thickness, not rubber, or the like. Good. Whether the sheet can be used as the tube receiving members 310 and 320 can be easily confirmed by looking at the discharge state when the tube pump 1 is operated by actually attaching it to the base members 31 and 32.

As shown in FIGS. 1 to 5, hook members 35 which are tube locking members are attached to the end plates 11A and 11B, respectively. Each hook member 35 is the same member, and the hook member 35 attached to the lower surface of the end plate 11A and the hook member 35 attached to the upper surface of the end plate 11B are attached upside down.
The hook member 35 has two grooves 351 formed therein. The grooves 351 are formed obliquely in two directions from the top as shown in FIG. As shown in FIGS. 3 and 4, a tube 40 is attached to the groove 351.

As shown in FIG. 8, the tube 40 includes two Y-shaped connectors 41 and two intermediate tubes 42A and 42B attached between the two branch couplings 411 of the respective connectors 41. It comprises and comprises end tube 43A, 43B by which the end was attached to the connection part 412 of the connector 41. As shown in FIG.
Therefore, two tubes of the middle part branched in the tube 40 are comprised by middle tube 42A, 42B. Further, one end tube 43A constitutes a tube at the liquid supply side end of the tube 40, and the other end tube 43B constitutes a tube at the liquid discharge side end of the tube 40.

A plurality of finger members 60 are disposed between the end plates 11A and 11B. In the present embodiment, fifteen finger members 60 are disposed.
As shown in FIGS. 5 and 7, each finger member 60 is provided with a finger plate 61 made of plastic and formed in a thin plate shape, a ring-shaped ball bearing 67, and a disk-shaped cam 68.

As shown in FIG. 9, the finger plate 61 includes a fixed portion 62, a moving portion 63, a drive shaft portion 64, a first hinge portion 65, and a second hinge portion 66, and is integrally molded. There is.
The fixing portion 62 includes a pair of fixed shaft portions 622 in which a hole 621 through which the support shaft 12 is inserted is formed, and a connecting plate portion 623 connecting the respective fixed shaft portions 622. The connecting plate portion 623 has a smaller thickness than that of the fixed shaft portion 622, thereby achieving weight reduction.

In FIG. 9, the moving unit 63 includes a main body portion 631 formed in a substantially J-shape in plan view, and a tube pressing and bending portion 632 protruding from the main body portion 631. The contour portion of the moving portion 63 is thickly formed in a rib shape, and the middle portion is formed in a thin plate shape.
The fixed shaft portions 622 of the fixed portion 62 and the moving portion 63 are connected by a pair of first hinges 65. Each first hinge portion 65 includes a first deformation portion 651 continuous to the fixed shaft portion 622, a reinforcement portion 652 continuous to the first deformation portion 651, and a second deformation provided between the reinforcement portion 652 and the movement portion 63. And a unit 653. The reinforcing portion 652 is also formed like a rib around its periphery, and the middle portion is formed like a thin plate.
Each of the deformation portions 651 and 653 is formed to have a smaller width than the reinforcing portion 652, and the deformation portion 651 and 653 bends (deforms) so that the moving portion 63 with respect to the fixed portion 62 in FIG. It is movable in the left and right direction. For this reason, the tube pressing and bending portion 632 is also movable in the left and right direction.

The tube pressing and bending portion 632 has a cross-sectional shape shown in FIG. That is, the tube pressing and bending portion 632 has a thin plate-like intermediate portion 6321 continuous with the thin plate-like intermediate portion of the main body portion 631, a rib portion 6322 continuous with the rib-like contour portion of the main body portion 631, and a rib And a protrusion 6323 protruding from the portion 6322.
The protrusion 6323 has a semicircular (circular arc) cross-sectional shape, and the radius of curvature of the circular arc surface is set to, for example, 3.0 mm or less, specifically 0.5 to 3.0 mm. There is.
The cross-sectional shape of the protrusion 6323 is not limited to a semicircular shape, and may be, for example, a cross-sectional triangle, a trapezoid, or the like, or a shape combining an arc and a straight line. In short, since it becomes difficult to bend the tube 40 if the area when the projection 6323 first contacts the tube 40 is large, the projection 6323 may be configured to have a shape and a size suitable for bending the tube 40.

The drive shaft portion 64 includes a ring portion 641 in which a through hole 641A in which the ball bearing 67 is disposed is formed, and a connecting portion 642 continuously formed on the ring portion 641. The connection portion 642 is also formed in a rib shape at its periphery, and the middle portion is formed in a thin plate shape.
The drive shaft 64 and the main body 631 of the moving unit 63 are connected by a pair of second hinges 66.
Each second hinge portion 66 is provided between a first deformation portion 661 continuous with the main body portion 631, a flat crescent-shaped reinforcement portion 662 continuous with the first deformation portion 661, and the reinforcement portion 662 and the connection portion 642. And a second deformation portion 663. The reinforcing portion 662 is also formed in a rib shape at its periphery, and the middle portion is formed in a thin plate shape.

  Each of the deformation portions 661 and 663 is formed to have a smaller width than the reinforcing portion 662, and the drive shaft portion 64 with respect to the moving portion 63 is configured by bending (deforming) the deformation portions 661 and 663 as shown in FIG. In the vertical direction.

As shown in FIG. 7, a cam 68 is disposed in the through hole 641 A of the drive shaft portion 64 via a ball bearing 67.
The cam 68 is formed in a planar circular shape, the outer peripheral portion is formed in a rib shape and the middle portion is formed in a thin plate shape. And the fitting hole 681 which the drive shaft 5 fits is formed in this thin plate part. The fitting hole 681 is formed at a position eccentric to the plane center of the cam 68. A stepped portion 682 is formed on the cam 68 so that the longest part from the center of the fitting hole 681 to the outer periphery of the cam 68 can be easily identified.

Here, the drive shaft 5 is a spline shaft, and 14 keys (protrusions) are formed along the axial direction. On the other hand, the cam 68 is formed with fourteen grooves in which the key of the spline shaft is fitted.
The finger members 60 are stacked in the vertical direction in a state where the support shaft 12 is inserted into the holes 621. The cam 68 of each finger member 60 moves from the first finger member 60 at the top to the fifteenth finger member 60 at the bottom from the topmost finger member 60. It is designed to shift one key at a time. Therefore, the phases of the cams 68 are sequentially shifted every 360/14 degrees from the first stage to the 15th stage, and the phases of the cams 68 of the finger members 60 of the first and 15th stages are the same. It is assumed.

Next, the operation of the present embodiment will be described with reference to the operation explanatory diagrams of FIGS. 7 and 11 to 13.
When the drive shaft 5 is rotated by the motor 4, the cam 68 is rotated. The cam 68 is an eccentric cam eccentric with respect to the rotation center of the drive shaft 5, and the fixing portion 62 of the finger member 60 is fixed by inserting the support shaft 12 into the hole 621. Therefore, when the cam 68 rotates, the tube pressing and bending portion 632 of the finger plate 61 reciprocates to the left and right, as described later.
Further, since the cams 68 are sequentially shifted and fitted to the 14 keys of the drive shaft 5, the tube pressing and bending portions 632 of each finger plate 61 are reciprocally driven to the left and right while being out of phase.

Here, as shown in FIG. 7, when the stepped portion 682 of the cam 68 is disposed on the right in the drawing, that is, the longest position from the rotation center of the drive shaft 5 to the outer periphery of the cam 68 is disposed on the right If so, the drive shaft 64 also moves to the right with respect to the drive shaft 5.
The second hinge portion 66 has the deformation portions 661 and 663 extended in the left and right direction in FIG. 7, so the displacement of the drive shaft portion 64 in the left and right direction is transmitted to the moving portion 63 as it is. Move to the right against Under the present circumstances, each deformation | transformation part 651, 653 of the 1st hinge part 65 deform | transforms, and the movement of the moving part 63 with respect to the fixing | fixed part 62 is permitted.

When the moving portion 63 moves to the right, the tube pressing and bending portion 632 moves to the tube receiving member 310 side, and the intermediate tube 42A is pressed and bent by the tube receiving member 310 and the tube pressing and bending portion 632. Thus, the space (flow path) in the intermediate tube 42A is closed.
On the other hand, since the size of the gap between the tube pressing and bending portion 632 and the second tube receiving member 320 is expanded, the intermediate tube 42B is not crushed and the internal space (flow path) is also opened.

When the drive shaft 5 is rotated 90 degrees clockwise in the drawing from the state of FIG. 7 and is in the state of FIG. 11, the step portion 682 of the cam 68 moves to the lower side of FIG. Do.
In this state, the drive shaft 64 moves downward with respect to the drive shaft 5 in the drawing. The movement of the drive shaft portion 64 is absorbed by the deformation of the deformation portions 661 and 663 of the second hinge portion 66. Then, since the cam 68 does not move in the left-right direction with respect to the drive shaft 5, the tube pressing and bending portion 632 has each tube receiving member when the cam 68 rotates to the state of FIG. 7 to FIG. It moves to the center position of the gap between 310 and 320 gradually.

Therefore, the flow path of the intermediate tube 42A which has been bent by the tube pressing and bending portion 632 is gradually opened. At this time, in the intermediate tube 42A, there is a portion where the projection 6323 does not abut between bending portions where the projections 6323 of the tube pressing and bending portions 632 abut. Since this portion contributes to the restoration of the bent portion of the intermediate tube 42A, when the projection 6323 leaves the intermediate tube 42A, the intermediate tube 42A follows and restores. As described above, since the intermediate tube 42A pressed by the tube pressing and bending portion 632 is easily restored, the amount of suction that can be suctioned into the restored space also increases, and the discharge amount of the tube pump 1 also increases.
On the other hand, the tube pressing and bending portion 632 gradually presses the intermediate tube 42B. However, although the flow path of the tube pressing and bending portion 632 gradually decreases in cross-sectional area, it is not completely closed.

When the drive shaft 5 is rotated 90 degrees clockwise in the drawing from the state of FIG. 11 and the state of FIG. 12 is reached, the step portion 682 of the cam 68 moves to the left side of FIG.
In this state, the drive shaft 64 moves to the left with respect to the drive shaft 5, and the deformation portions 651 and 653 of the first hinge 65 deform and the moving portion 63 also moves to the left.
The tube pressing and bending portion 632 gradually moves from the central position of the gap between the tube receiving members 310 and 320 toward the second tube receiving member 320 when the cam 68 rotates to the state of FIGS. .

When the moving portion 63 moves to the left, the tube pressing and bending portion 632 moves to the tube receiving member 320 side, and the intermediate tube 42B is pressed and bent by the tube receiving member 320 and the tube pressing and bending portion 632. Therefore, the space (flow path) in the intermediate tube 42B is closed.
On the other hand, since the gap dimension between the tube pressing and bending portion 632 and the tube receiving member 310 is expanded, the flow path of the intermediate tube 42A is further opened.

When the drive shaft 5 is rotated 90 degrees clockwise in the drawing from the state of FIG. 12 and is in the state of FIG. 13, the step portion 682 of the cam 68 moves to the upper side of FIG. .
In this state, the drive shaft 64 moves upward with respect to the drive shaft 5 in the figure. The movement of the drive shaft portion 64 is absorbed by the deformation of the deformation portions 661 and 663 of the second hinge portion 66. Then, since the cam 68 does not move in the left-right direction with respect to the drive shaft 5, the tube pressing and bending portion 632 has each tube receiving member when the cam 68 rotates to the state of FIG. 12 to FIG. It moves to the center position of the gap between 310 and 320 gradually.

Therefore, the flow path of the intermediate tube 42B which has been pressed and crushed by the tube pressing and bending portion 632 is gradually opened. Also in this case, since there is a portion which is not pressed by the tube pressing and bending portion 632, the intermediate tube 42B is easily restored, and the suction amount which can be sucked into the restored space is also increased. Increase.
On the other hand, the tube pressing and bending portion 632 gradually presses the intermediate tube 42A, and the flow path of the tube pressing and bending portion 632 gradually decreases in cross-sectional area, but is not completely closed.

When the drive shaft 5 is rotated 90 degrees clockwise in the drawing from the state of FIG. 13, the state returns to the state of FIG. Therefore, when the drive shaft 5 and the cam 68 make one rotation, the tube pressing and bending portion 632 of the finger member 60 makes one reciprocation between the tube receiving members 310 and 320. By repeating this operation, the intermediate tubes 42A and 42B are alternately pressed.
Further, as shown in FIG. 4, in the fifteen finger members 60 stacked vertically, as described above, the phase of the cam 68 is sequentially shifted, so the position of the tube pressing and bending portion 632 in the left-right direction It is also out of order. For this reason, each tube pressing and bending portion 632 is disposed so as to form a substantially sine curve along the vertical direction.

  In order to discharge a predetermined liquid using the tube pump 1 having the above configuration, first, as shown in FIG. 3, the toggle plate 26 is opened, and the state between the tip portions of the shaft arm 21 and the receiving arm 22 is opened. Then, the tube 40 is hooked to the hook member 35 and attached. At this time, the intermediate tubes 42A and 42B of the tube 40 are slightly tensioned and arranged linearly at the left and right positions of the tube pressing and bending portion 632 in the vertical direction. Since each intermediate tube 42A, 42B is subjected to tension, the intermediate tube 42A, 42B is set so as not to move forward, backward, leftward or rightward.

Next, the toggle plate 26 is moved to the receiving arm 22 side and closed. Then, the shaft arm 21 and the receiving arm 22 whose distal end side is open are also arranged parallel to each other, and the tube receiving members 310 and 320 also come into contact with the intermediate tubes 42A and 42B.
Then, the end tube 43A of the tube 40 is connected to the liquid supply side, for example, a container in which the liquid is stored, and the end tube 43B is connected to the liquid discharge side, for example, a discharge nozzle.
Thus, the preparation work of the tube pump 1 is completed.

Next, the motor 4 is driven by an external controller. When the drive shaft 5 is rotated by the drive of the motor 4, the tube pressing and bending portion 632 of each finger member 60 moves to the left and right to close or open the flow path of each of the intermediate tubes 42A and 42B. The liquid is aspirated from the part tube 43A side and transferred to the end part tube 43B.
That is, since the intermediate tubes 42A and 42B are sequentially closed by the finger member 60 one step higher from the state where one of the intermediate tubes 42A and 42B is closed by the tube pressing and bending portion 632 of the lowermost finger member 60. In each of the intermediate tubes 42A and 42B, the channel closing position sequentially moves upward.

Then, when the closed channel is opened, a negative pressure is generated to suck the liquid from the end tube 43A side. The aspirated liquid is separated from the end tube 43A by the connector 41 and moves to each of the intermediate tubes 42A and 42B.
In each of the intermediate tubes 42A and 42B, the flow path is sequentially opened and closed by the tube pressing and bending portion 632 so that the liquid gradually moves upward in the intermediate tubes 42A and 42B, and from the connector 41 to the end tube 43B It moves inside and is discharged.
At this time, the opening / closing timing of each of the intermediate tubes 42A, 42B is 180 degrees out of phase, so the end tube 43A is separated into each of the intermediate tubes 42A, 42B, and the discharge amount of the liquid joined again to the end tube 43B is It is always kept constant.

  When replacing the tube 40, for example, when the liquid discharge operation is completed, the motor 4 is stopped, the toggle plate 26 is opened, and the tube 40 locked to the hook member 35 is removed. Then, by holding the washed and dried tube 40 or another tube 40 separately prepared on the hook member 35 and closing the toggle plate 26, the liquid discharge operation can be performed again.

According to this embodiment, the following effects can be obtained.
The tube pump 1 has the tube receiving members 310 and 320 attached to the base members 31 and 32, and the tube receiving members 310 and 320 receive the tubes 40 (intermediate tubes 42A and 42B). Therefore, when the tube pressing and bending portion 632 of the finger member 60 presses the tube 40, the tube receiving members 310 and 320 are deformed, and the tube 40 is bent at a position where the tube pressing and bending portion 632 contacts. can do. The bending of the tube 40 can be performed with a smaller force than in the case of crushing the tube 40. Therefore, even when the tube 40 made of fluororesin is used, the finger member 60 whose pressing force is smaller than the roller is used. The tube 40 can be easily bent using this. Therefore, even in the case of using the fluorine resin tube 40 with low flexibility, it is not necessary to use a large motor, and the tube pump 1 can be miniaturized while being finger type.
Furthermore, even when the low-resilience fluororesin tube 40 is used, the tube pressing and bending portions 632 of the plurality of finger members 60 can be disposed apart from each other because the finger 40 presses the tube 40. For this reason, in the tube 40, a portion which is not pressed can be secured between the bent portions which are bent by the tube pressing and bending portion 632, and this portion contributes to the restoration of the tube 40. The bent tube 40 can be easily restored, and the amount of suction that can be drawn into the restored space can also be increased, and as a result, the discharge amount of the tube pump 1 can be increased.

In the finger type tube pump 1 using a plurality of finger members 60, pressing of the two middle tubes 42A and 42B can be realized by moving one finger member 60. Therefore, the number of finger members 60 can be halved as compared to the case where different fingers are provided for each tube.
For this reason, even with the finger type tube pump 1 using two tubes 42A and 42B, an increase in the number of parts can be suppressed, so the tube pump 1 can be configured compactly and can be manufactured inexpensively. .

  Further, the tube 40 is branched from the end tube 43A on the liquid supply side to the intermediate tubes 42A and 42B through the connector 41, and the bifurcated tube so that the liquid flows again to the end tube 43B through the connector 41. Further, since the tube pressing and bending portion 632 of the finger member 60 opens and closes each of the intermediate tubes 42A and 42B in the phase of 180 degrees, it is possible to realize feeding of two systems 180 degrees out of phase. It is possible to suppress the pulsation of the discharge liquid.

Further, when the tube 40 is attached to or detached from the tube pump 1, for example, when replacing the tube 40 to change the type of discharge liquid, or when cleaning the tube 40 for maintenance, the toggle plate 26 is opened and closed. Between the tip of the shaft arm 21 and the receiving arm 22 and the tube 40 need only be hooked on the connector 41 in the groove 351 of the hook member 35, so the tube 40 can be easily replaced. It can be carried out. For this reason, even when it is necessary to replace the tube 40 a plurality of times a day, the replacement operation can be performed easily and in a short time.
Moreover, since the shaft arm 21 and the receiving arm 22 are moved by the toggle mechanism using the toggle plate 26 etc., the exchange operation can be performed easily and in a short time also at this point.

  Since the intermediate tubes 42A and 42B of the tubes 40 are set to a length to which a tension is applied when being locked to the hook member 35, when the intermediate tubes 42A and 42B are pressed by the tube pressing and bending portion 632, etc. The intermediate tubes 42A and 42B do not move, and the channel can be opened and closed reliably by pressing the tube pressing and bending portion 632. Therefore, the accuracy of the discharge amount of the tube pump 1 can be improved.

  In addition, since the middle tubes 42A and 42B of the tubes 40 are set linearly in the vertical direction, air in the tubes which causes an error in the discharge amount can be easily removed, and the discharge accuracy is improved also in this respect. it can. For this reason, even when the tube 40 is replaced, the fluctuation of the discharge amount can be suppressed, and even when the tube 40 is replaced, the stable discharge operation can be performed with less fluctuation of the discharge amount.

  Further, since the finger member 60 uses the finger plate 61 in which the fixed portion 62, the moving portion 63, the drive shaft portion 64, the first hinge portion 65, and the second hinge portion 66 are integrally formed, the drive shaft 5 and By the rotation operation of the cam 68, the tube pressing and bending portion 632 of the finger plate 61 can be driven to reciprocate. On the other hand, the finger members of a conventional tube pump are axially advanced and retracted by the cam, push the tube when protruding, and open the tube when returning. At this time, in order to interlock the finger member with the cam, the finger member is urged toward the cam side by a spring or the like so as to always abut the cam. For this reason, even when the finger member returns, pressing the tube requires adjustment of the spring force, which is difficult to realize. For this reason, it is difficult to press two tubes by one finger member when driving a conventional finger member against a cam. On the other hand, if the configuration of the finger member 60 according to the present embodiment is adopted, the tube pressing and bending portion 632 can be reciprocated to the left and right using the hinge mechanism. Thus, each tube can be pressed alternately.

In addition, since the finger member 60 uses the finger plate 61 integrally formed including the first hinge portion 65 and the second hinge portion 66, rattling occurs when the tube pressing and bending portion 632 is moved. The discharge accuracy can be improved also in this respect.
Furthermore, although the tube pressing and bending portion 632 moves to the left and right with respect to the fixed portion 62 side, since the stroke (moving amount) is small, it can be made substantially parallel movement (moving). Therefore, since the tube pressing and bending portion 632 presses the intermediate tubes 42A and 42B in parallel to the tube receiving members 310 and 320, the intermediate tubes 42A and 42B are uniformly pressed to reliably block the flow path. can do.
Moreover, the finger plate 61 can be manufactured at low cost because it can be formed of one part without having a portion that rubs against other parts. In particular, since many finger plates 61 are used, the effect of reducing the cost of parts can also be increased.

  Further, since the discharge amount when one rotation of the drive shaft 5 is made constant, the discharge amount per time can be easily set by adjusting the rotation speed of the drive shaft 5. Also in this respect, the tube pump 1 can be made easy to use.

The present invention is not limited to the above embodiment, and various improvements and design changes can be made without departing from the scope of the present invention.
Although the tube 40 in which the intermediate tubes 42A and 42B and the end tubes 43A and 43B are connected by the Y-shaped connector 41 is used in the embodiment, the configuration of the tube 40 is not limited to this.
For example, the intermediate tubes 42A, 42B and the end tubes 43A, 43B may be attached to the tube pump 1 using the tube holder 70 shown in FIGS. The tube holder 70 can hold the intermediate tubes 42A and 42B and the end tubes 43A and 43B without applying tension, and can hold the intermediate tubes 42A and 42B and the end tubes 43A and 43B without bending. Thus, it is possible to easily use a tube of a material which is difficult to apply tension or to hold in a bent state, such as polytetrafluoroethylene (PTFE).

The tube holder 70 includes a holder frame 71 and two Y-shaped joints 75.
The holder frame 71 is formed by bending a plate material made of metal such as stainless steel, and includes a pair of joint holding portions 72 for holding the Y-shaped joint 75 and a pair of connecting portions 73 for connecting the joint holding portions 72. There is.
The holder frame 71 is formed with an opening 74 surrounded by the pair of joint holding portions 72 and the connecting portion 73. In the opening 74, the intermediate tubes 42A and 42B and a tube pressing and bending portion 632 (not shown) are disposed.

  The joint holding portion 72 includes a holding piece portion 720, and a connection piece 721 and a tube guide piece 722 bent from the holding piece portion 720. The holding piece portion 720 is a portion for holding the Y-shaped joint 75 with the tube pump 1 and for attaching the holder frame 71 to the cover 3 of the tube pump 1 and the panel end plates disposed above and below the cover 3. A through hole 723 (see FIG. 15) through which the mounting screw 711 shown in FIG. 14 is inserted is formed.

The connection piece 721 is formed with a screw hole 7211 to which the end tubes 43A and 43B are attached.
The tube guide piece 722 is formed with a guide groove 7221 for guiding the intermediate tubes 42A and 42B.

The Y-shaped joint 75 is made of, for example, a block made of a synthetic resin such as PEEK (polyether ether ketone). The Y-shaped joint 75 includes two insertion holes 751 into which the ends of the end tubes 43A and 43B are inserted, and one insertion hole 752 into which one end of the end tubes 43A and 43B is inserted. A connecting passage 753 connecting the two insertion holes 751 and the one insertion hole 752 is provided.
Here, since the insertion holes 751 and the insertion holes 752 are formed in a linear shape, the respective tubes 42A, 42B, 43A, 43B can also be arranged in a linear shape.

A metal insert pipe 421 such as stainless steel is inserted into both ends of the intermediate tubes 42A, 42B so that the intermediate tubes 42A, 42B can be easily inserted into the insertion holes 751.
Further, the insertion hole 751 is formed with a step part in the middle, and the opening side of the insertion hole 751 is a large diameter part having a larger diameter than the connection path 753 side of the insertion hole 751. An O-ring 755 and a tube push pipe 756 for pressing the O-ring 755 into the large diameter portion are inserted into the large diameter portion. The tube pushing pipe 756 is formed in a cylindrical shape with a flange, and the flange is positioned by being pinched by the Y-shaped joint 75 and the tube guide piece 722.

  A ferrule 431 made of synthetic resin such as PEEK is inserted into the end of the end tube 43A, 43B. An O-ring 761 is disposed around the ferrule 431. The ferrule 431 and the O-ring 761 are pushed into the bottom of the insertion hole 752 by a tube screw 77 screwed into the screw hole 7211. Therefore, by screwing the tube screw 77 into the screw hole 7211, the Y-shaped joint 75 is pushed toward the tube guide piece 722 via the ferrule 431 and the O-ring 761. Therefore, the Y-shaped joint 75 is positioned with the tube pushing pipe 756 abutting on the tube guide piece 722.

  The holder frame 71 on which the Y-shaped joint 75 and the tubes 42A, 42B, 43A, 43B are mounted is attached to the front of the tube pump 1 by the attachment screw 711. Then, since the tube pressing and bending portion 632 is disposed between the intermediate tubes 42A and 42B, the liquid can be sequentially discharged by the operation of the tube pressing and bending portion 632 as in the above embodiment.

  When the tubes 42A, 42B, 43A, 43B are mounted on the tube pump 1 using the holder frame 71 and the Y-shaped joint 75, tension is not applied to the tubes 42A, 42B, 43A, 43B. And each tube 42A, 42B, 43A, 43B is hold | maintained with a straight state. For this reason, it is difficult to apply tension, as in the case of a PTFE tube, and it is possible to use a tube made of a material that is thin and easily bent when it is curved to block the flow path.

  Furthermore, the configuration of the tube 40 is not limited to the above-described one, and for example, the tube 40 is installed in the tube pump 1 configured by connecting the end tubes 43A, 43B and the intermediate tubes 42A, 42B by adhesion or the like. Alternatively, a bifurcated tube may be used.

The configuration of the finger plate 61 is also not limited to the above embodiment. For example, as shown in FIG. 16, a guide pin 91 protruding in the left-right direction is attached to the moving part 63, and a guide 92 for guiding the guide pin 91 is provided on the housing side. You may use the finger board 61A guided so that it could move only to the left-right direction.
The finger plate 61A is supported on the housing side by the guide pin 91 and the guide 92, and when the drive shaft 64 is moved laterally by the rotation of the drive shaft 5 and the cam 68, the moving portion 63 and the tube pressing The bending portion 632 also moves to the left and right. For this reason, with respect to the finger plate 61 of the first embodiment, the finger plate 61A is not provided with the fixing portion 62 and the first hinge portion 65.
The finger plate 61A is also the same as the finger plate 61 in that the movement of the finger plate 61A is absorbed by the deformation of the second hinge portion 66 when the drive shaft portion 64 moves back and forth.

Also in the case of using such a finger plate 61A, the same operation and effect as the above embodiment can be achieved.
On the other hand, the finger plate 61A requires separate parts such as the guide pin 91 and the guide 92, so the number of parts is increased. In this respect, the finger plate 61 of the embodiment having a small number of parts has an advantage that the cost can be reduced.

Furthermore, although the ball bearing 67 is interposed between the cam 68 and the drive shaft portion 64, the cam 68 may be disposed directly in the through hole 641A of the drive shaft portion 64 without providing the ball bearing 67.
Further, a groove is formed on the inner peripheral surface of the through hole 641A to form an outer race, a groove is formed on the outer peripheral surface of the cam 68 to form an inner race, and a ball (a cage as required) is disposed therebetween. The ball bearing may be configured directly.
Moreover, in the said embodiment, although 15 finger members 60 were provided, the number of finger members 60 may be smaller or larger. However, if the number of finger members 60 is small, the fluctuation of the discharge liquid becomes large, and it becomes difficult to make the discharge amount substantially constant.
On the other hand, when the number of finger members 60 is increased, the tube pump 1 is increased in size and cost. Therefore, the number of finger members 60 may be set in consideration of these points.

Moreover, in the said embodiment, although middle tube 42A, 42B was arrange | positioned in the up-down direction, you may arrange | position horizontally.
Furthermore, the base members 31 and 32 and the tube receiving members 310 and 320 are attached to the shaft arm 21 and the receiving arm 22 and move the tube 40 so as to be easily attached and detached by the toggle mechanism such as the coil spring 24 and the toggle plate 26. However, the moving mechanism is not limited to that of the above embodiment.

In the above embodiment, two intermediate tubes 42A and 42B are disposed between the tube receiving members 310 and 320. However, the tube pump of the present invention can be used even if only one tube is set. That is, when a tube is disposed only between any one of the tube receiving members 310 and 320 and the tube pressing and bending portion 632, it is possible to send out and discharge the liquid using this tube.
In this case, the tube pressing and bending portion 632 moves to the left and right with respect to the fixed portion 62 side, but since the stroke (moving amount) is small, it can be made substantially parallel movement (moving). For this reason, even when only one tube is disposed, the tube pressing and bending portion 632 presses the tube evenly to reliably close the flow path, since the tube pressing and bending portion 632 presses the tube receiving member in parallel. The tube deterioration can also be suppressed. That is, the finger member 60 according to the present invention has an advantage of being able to uniformly press the tube, even in the case of one tube, by including the integrally formed finger plate 61.

Moreover, as a tube, it is not restricted to the thing of the said embodiment. For example, two independent tubes may be provided from the liquid supply side to the intermediate portion, and the liquid discharge sides of these tubes may be connected by the connector 41 and connected to the end tube 43B on the liquid discharge side.
Furthermore, as the tubes, two tubes which are completely independent from the liquid supply side to the middle part and the liquid discharge side may be used.
In the above embodiment, one tube 42A, 42B is disposed between the tube pressing and bending portion 632 and the tube receiving members 310, 320, respectively, but two or more tubes may be disposed. That is, a plurality of tubes are arranged in the protruding direction of the tube pressing and bending portion 632 between the tube pressing and bending portion 632 and the tube receiving members 310 and 320, and the plurality of tubes is the tube pressing and bending portion 632 and the tubes The flow path of each tube may be opened and closed by sandwiching and pressing the receiving members 310 and 320. If comprised in this way, discharge amount can be increased according to the number of tubes.

  Furthermore, as a structure which drives the tube press bending part 632, it is not limited to the said embodiment. That is, the present invention only needs to include the tube pressing and bending portion 632 and the tube receiving members 310 and 320, and the other configuration may be similar to that of the conventional finger type tube pump.

Although the best configuration, method and the like for practicing the present invention are disclosed in the above description, the present invention is not limited thereto. That is, although the present invention has been particularly illustrated and described primarily with respect to particular embodiments, it should be understood that the present invention may be configured relative to the above-described embodiments without departing from the spirit and scope of the present invention. Those skilled in the art can make various modifications in materials, quantities, and other detailed configurations.
Therefore, the description with the above-described disclosure of the shape, the material, etc. is exemplarily described for facilitating the understanding of the present invention, and is not intended to limit the present invention. The description in the name of the member from which the limitation of some or all of the limitations such as is removed is included in the present invention.

  DESCRIPTION OF SYMBOLS 1 ... Tube pump, 4 ... Motor, 10 ... Pump part, 11A, 11B ... End plate, 12 ... Support shaft, 21 ... Axis arm, 22 ... Receiving arm, 24 ... Coil spring, 26 ... Toggle board, 31 ... 1st Base member, 32: second base member, 310: first tube receiving member, 320: second tube receiving member, 35: hook member, 40: tube, 41: connector, 42A, 42B: intermediate tube, 43A, 43B: End tube, 60: finger member, 61, 61A: finger plate, 62: fixed part, 63: moving part, 64: drive shaft part, 65: first hinge part, 66: second hinge part, 67: ball bearing 68: Direct cam, 351: Groove, 632: Tube pressing bent portion, 6323: Protrusion portion, 651, 661: First deformation portion, 653, 663: Second deformation portion.

Claims (6)

A tube whose one end is a suction side and whose other end is a discharge side;
A base member disposed along the tube;
At least three or more finger members provided opposite to the base member across the tube;
And a drive mechanism for driving each finger member.
The finger member, when driven by the drive mechanism comprises a tube press bent portion by bending presses you close the flow path in the tube the tube,
The drive mechanism drives the finger members so that the tube pressing and bending portions sequentially move the tube by pressing and bending the tube from the suction side to the discharge side of the tube.
The tube pump is characterized in that the base member is provided with a tube receiving member which is deformed with the tube to support the bending of the tube when the tube is pressed by the tube pressing and bending portion. . In the tube pump according to claim 1,
The tube pump, wherein the tube receiving member is a rubber sheet having a Shore A of 50 or more and 100 or less. The tube pump according to claim 1 or 2,
The tube pressing and bending portion includes a protrusion formed in an arc shape in cross section,
The circular arc surface of the projection is a curved surface having a curvature radius of 3.0 mm or less. The tube pump according to any one of claims 1 to 3.
The tube pump is a fluororesin tube. The tube pump according to any one of claims 1 to 4,
The drive mechanism includes a motor and a drive shaft rotated by the motor.
The finger member includes a thin plate-shaped finger plate and a cam that rotates integrally with the drive shaft.
The finger plate includes a fixed portion fixed to the housing side of the tube pump, a moving portion connected to the fixed portion via the first hinge portion, and a second hinge portion to the moving portion. And an integrally formed drive shaft portion connected with each other,
The cam is an eccentric cam in which the drive shaft is fixed at a position eccentric to the center of the cam, and is rotatably supported by a hole provided in the drive shaft portion.
The tube pressing and bending portion is formed in the moving portion,
In the first hinge portion, the tube pressing and bending portion is formed to be movable forward and backward with respect to the tube,
The second hinge portion can move the drive shaft portion in a direction orthogonal to the moving direction of the moving portion by the first hinge portion in a plane orthogonal to the driving shaft with respect to the moving portion. The tube pump characterized in that. The tube pump according to any one of claims 1 to 5,
The tube is configured to include a first tube and a second tube provided parallel to each other,
The tube receiving member includes a first tube receiving member disposed along the first tube and a second tube receiving member disposed along the second tube, the first tube receiving member and the second tube receiving member The tube receiving member is disposed opposite to each other across the first tube and the second tube,
The tube pressing and bending portion of each finger member is disposed between the first tube and the second tube,
The driving mechanism is a position where the tube pressing and bending portion presses the first tube to bend the first tube with the first tube receiving member, and the tube pressing and bending portion is the second A tube pump characterized by pressing a tube and driving each of the finger members to reciprocate between the second tube receiving member and a bending position of the second tube.

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