WO2019016904A1

WO2019016904A1 - Flow passage opening/closing mechanism, and peritoneum dialysis device provided with said flow passage opening/closing mechanism

Info

Publication number: WO2019016904A1
Application number: PCT/JP2017/026163
Authority: WO
Inventors: 祐卓森田; 吉田　英雄
Original assignee: 株式会社ジェイ・エム・エス
Priority date: 2017-07-19
Filing date: 2017-07-19
Publication date: 2019-01-24
Also published as: CN110891626A; CN110891626B

Abstract

The present invention provides: a flow passage opening/closing mechanism in which clogging of a flow passage due to deformation of tube does not easily occur; and a peritoneum dialysis device provided with the flow passage opening/closing mechanism. This flow passage opening/closing mechanism 1, which opens/closes a flow passage for a liquid formed inside a flexible tube, is provided with: a clamp part 20 which has pressing members 21 that can press the tube, and a driving mechanism 22 that moves the pressing members 21 forward/backward in a first direction, and which closes the flow passage by moving the pressing members 21 forward and opens the flow passage by moving the pressing members 21 backward; and guide members 30 that restrict the position of the tube in the vicinity of the clamp part 20, wherein the guide members 30 are each provided with a guide member body 31, and groove parts 32 which extend in the first direction in the guide member body 31, are each formed to have a width D1 equal to or smaller than the outer diameter D2 of the tube, and clamp the tube in a second direction crossing the first direction.

Description

Flow path opening / closing mechanism and peritoneal dialysis device provided with the flow path opening / closing mechanism

The present invention relates to a flow path opening / closing mechanism for opening / closing a flow path of a liquid formed inside a flexible tube, and a peritoneal dialysis device provided with the flow path opening / closing mechanism.

Conventionally, there has been proposed a peritoneal dialysis apparatus that discharges wastes and the like contained in blood from the body by injecting the dialysate into the abdominal cavity of a patient and discharging the dialysate injected after a predetermined time has elapsed (for example, , Patent Document 1). In such a peritoneal dialysis apparatus, after a predetermined amount of dialysate is aspirated from a dialysate bag containing dialysate, a step of feeding the aspirated dialysate into the abdominal cavity, and a predetermined amount of the peritoneal cavity After suctioning the dialysate (drainage), the drainage step of draining the suctioned dialysate (drainage) to the drainage bag is repeated respectively.

As a configuration for performing the liquid transfer step and the drain step, the peritoneal dialysis device has a plurality of flexible tubes each having one end connected to the dialysate bag or the drain bag, and a plurality of tubes other than the plurality of tubes. A liquid feeding / draining cassette comprising a chamber connected to the end side and a diaphragm (diaphragm) partitioning the inside of the chamber, and a plurality of tubes of this liquid feeding / draining cassette are pressed to A flow path opening / closing mechanism that opens the flow path by closing and releasing the pressure, and an air pump that reciprocates the diaphragm by drawing air into and out of the chamber to suck or deliver a fixed amount of dialysate.

JP, 2006-181386, A

By the way, in the flow path opening / closing mechanism, the flexible tube is deformed in a predetermined direction so as to crush the tube and the flow path is closed. Therefore, for example, when the temperature of the use environment of the peritoneal dialysis device is low, it takes time to restore the shape of the deformed tube when the flow passage is opened from the closed state of the flow passage, In some cases, the dialysis device erroneously detects that the flow path is blocked. In addition, there is also a problem that the time taken for liquid transfer / drainage of the dialysate is prolonged due to the delay in the restoration of the shape of the tube when the flow path is opened.

Accordingly, an object of the present invention is to provide a flow path opening / closing mechanism that is less likely to cause blockage of the flow path due to deformation of the tube, and a peritoneal dialysis device provided with the flow path opening / closing mechanism.

The present invention is a flow path opening / closing mechanism that opens and closes a flow path of a liquid formed inside a flexible tube, and a pressing member capable of pressing the tube, and advancing and retracting the pressing member in a first direction A drive mechanism for closing the flow path by advancing the pressing member and a clamp portion for opening the flow path by retracting the pressing member, and a position of the tube in the vicinity of the clamp portion And the guide member is formed to have a width equal to or less than the outer diameter of the tube and extends in the first direction in the guide member body and the guide member body. The present invention relates to a flow path opening / closing mechanism provided with a groove portion that holds in a second direction that intersects the direction.

Preferably, the width of the groove is smaller than the outer diameter of the tube.

Moreover, it is preferable that the said guide member is arrange | positioned at the one end side and the other end side in the vicinity of the said clamp part in the said tube.

In addition, the flow path opening / closing mechanism includes a plurality of clamps disposed corresponding to a plurality of tubes, and the guide member has a plurality of grooves disposed corresponding to a plurality of clamps. Is preferred.

Further, according to the present invention, there is provided the flow channel opening / closing mechanism described above, a plurality of the tubes each having one end connected to the dialysate supply source or the dialysate delivery destination, a chamber connected to the other end of the tube, and The present invention relates to a peritoneal dialysis device including a liquid feeding / draining cassette provided with a diaphragm that divides the inside, and an air pump that reciprocates the diaphragm by drawing air in and out of the chamber to aspirate or deliver a fixed amount of dialysate. .

According to the present invention, it is possible to provide a flow path opening / closing mechanism that is less likely to cause blockage of the flow path due to deformation of the tube, and a peritoneal dialysis device provided with the flow path opening / closing mechanism.

It is a perspective view showing a peritoneal dialysis device provided with a channel opening and closing mechanism concerning one embodiment of the present invention. It is a figure which shows the structure of the liquid feeding * drainage cassette of the peritoneal dialysis apparatus of this embodiment. It is an enlarged view of the flow-path opening-and-closing mechanism part in the peritoneal dialysis apparatus shown in FIG. It is a perspective view which shows the state in which the liquid feeding / drainage cassette was attached to the flow-path opening-and-closing mechanism. It is a top view which shows the state in which the liquid feeding * drainage cassette was attached to the flow-path opening / closing mechanism. It is a top view which shows the structure of the clamp part of a flow-path opening-and-closing mechanism. FIG. 7 is a view schematically showing an operation of a clamp unit, which corresponds to a cross section along line XX in FIG. 6; FIG. 7 (a) shows a state in which the flow path of the tube is closed, and FIG. 7 (b) shows a state in which the flow path of the tube is opened. FIG. 7 is a view schematically showing an operation of a clamp unit, and a view corresponding to a cross section along line YY in FIG. 6; FIG. 8 (a) shows a state in which the flow path of the tube is closed, and FIG. 8 (b) shows a state in which the flow path of the tube is opened. It is a front view which shows the state by which the tube was clamped by the groove part of the guide member. It is a perspective view which shows the state by which the flow path of the tube was closed by the flow-path opening-and-closing mechanism of this embodiment.

Hereinafter, a preferred embodiment of the flow path opening / closing mechanism and the peritoneal dialysis device of the present invention will be described with reference to the drawings.
The flow path opening / closing mechanism 1 of the present embodiment is applied to a peritoneal dialysis device 100, as shown in FIG. First, the configuration of the peritoneal dialysis device 100 will be described.

As shown in FIGS. 1 and 2, the peritoneal dialysis apparatus 100 includes a dialysis apparatus main body 110, a heating unit 120 for storing and heating a dialysate bag, and a heating unit cover that covers the heating unit 120. 111, a liquid feeding / draining cassette 130 (see FIG. 2) for sucking and feeding a fixed amount of dialysate, a flow path opening / closing mechanism 1 for opening / closing a flow path of liquid feeding / draining cassette 130, liquid feeding The air pump 140 for operating the drainage cassette 130, the cassette lid 112 covering the flow path opening / closing mechanism 1, and the operation unit 150 are provided.

The dialysis device body 110 constitutes the outer shape of the peritoneal dialysis device 100.
The heating unit 120 is disposed on the upper surface of the dialysis device body 110. The heating unit 120 includes a storage unit 121 for storing the dialysate bag in which the dialysate is stored, and a heating mechanism (not shown) for heating the dialysate bag for heating. The heating unit 120 heats the heating dialysate bag (dialysate) stored in the storage unit 121 to a predetermined temperature by the heating mechanism. The temperature of the dialysate heated in the heating unit 120 is measured by the temperature sensor 123.
The heating unit lid 111 is attached to the dialysis device main body 110 so as to be openable and closable, and covers the heating unit 120.

As shown in FIG. 2, the liquid feeding / draining cassette 130 includes a plurality of

tubes

131, 132, 133, 134, 135, a chamber 136, and a plurality of diaphragms 137 disposed inside the chamber 136. And a fixing member 138 for fixing the

tubes

131, 132, 133, 134, and 135 of the above.
The plurality of

tubes

131, 132, 133, 134, and 135 are made of a flexible synthetic resin (for example, soft polyvinyl chloride). One end of each of the

tubes

131, 132, 133, 134, and 135 is supplied with a dialysate supply source (a dialysate bag 101 for heating, a dialysate bag 102 for replenishment, a dialysate bag 103 for concentration change) or dialysis It is connected to a fluid delivery destination (intraperitoneal cavity of patient P, drainage bag 104).

In the present embodiment, the tube 131 is connected to the heating dialysate bag 101 stored in the heating unit 120, and constitutes a part or all of the heating line L1 (the same applies to the following). The tube 132 is connected to the replacement dialysate bag 102 (in this embodiment, three replacement dialysate bags 102), and constitutes a replacement line L2. The tube 133 is connected to the concentration change dialysate bag 103 containing dialysate having a concentration different from that of the dialysate contained in the replacement dialysate bag 102, and constitutes a concentration change line L3. The tube 134 is connected to the peritoneal cavity of the patient P and constitutes a peritoneal line L4. The tube 135 is connected to a drainage bag 104 for containing drainage, and constitutes a drainage line L5.
Each tube is connected to a bag or the like directly or via a connector.

The chamber 136 is made of a hard synthetic resin (for example, hard polyvinyl chloride) and is formed to a predetermined volume (for example, 100 ml). In the present embodiment, the chamber 136 is formed in a shape in which parts of two identical spherical surfaces are bonded. At the centers of the two spherical surfaces of the chamber 136, through holes 136a for communicating the inside and the outside of the chamber 136 are formed, respectively. The other end side of the plurality of

tubes

131, 132, 133, 134, 135 is connected to one spherical through hole 136a. More specifically, the other ends of the plurality of

tubes

131, 132, 133, 134, 135 are assembled into a single tube 139, and the assembled single tube 139 is one of the chambers 136. It is connected to a through hole 136a formed in a spherical surface.

The diaphragm 137 is formed of an elastic membrane member and defines the inside of the chamber 136.

The fixing member 138 includes a rectangular frame 138a, and a rod 138b having one end connected to the frame 138a and extending like a rod. A plurality of fixing grooves 138c for fixing the

tubes

131, 132, 133, 134, 135 in a state where the plurality of

tubes

131, 132, 133, 134, 135 are arranged in parallel to each other in the frame portion 138a 2) are formed, and by fixing the

tubes

131, 132, 133, 134, and 135 in these fixing grooves, the

tubes

131, 132, 133, 134, and 135 are fixed to the frame portion 138a. The rod portion 138 b is connected to the chamber 136 at the other end, and supports one tube 139 collected at the other end of the

tubes

131, 132, 133, 134, 135.

The flow path opening / closing mechanism 1 is disposed on the upper surface of the dialysis device main body 110 as shown in FIGS. 1 and 3. As shown in FIGS. 3 to 5, the above-mentioned liquid feeding / draining cassette 130 is attached to the flow path opening / closing mechanism 1. The flow path opening / closing mechanism 1 opens / closes the flow path of the plurality of

tubes

131, 132, 133, 134, 135 of the liquid feeding / draining cassette 130.

The flow path opening / closing mechanism 1 includes a clamp unit 20 and a guide member 30.
The clamp part 20 is arrange | positioned on the other side of the press member 21 which pinches | interposes a tube between the press member 21 which presses a tube, the drive mechanism 22 which makes this press member 21 advance / retract, and a tube, as shown in FIG.6 and FIG.7. And a pressing member 23.

In the present embodiment, five sets of clamp portions 20 are arranged corresponding to the five

tubes

131, 132, 133, 134, and 135, respectively. More specifically, as shown in FIGS. 3 to 6, in the present embodiment, the clamp portions 20 are arranged in two rows, and in one row (the right row in FIG. 5), the

tubes

131 and 135 are provided. The clamp part 20 which opens and closes is arrange | positioned, and the clamp part 20 which opens and closes tube 132,133,134 is arrange | positioned in the other row (row on the left side in FIG. 5).

As shown in FIG. 3, the pressing member 21 is formed in a pointed (thin) shape with a tip (upper end) having a width slightly larger than the width (outside diameter) of the tube. The pressing member 21 is disposed below the tube so that the width direction of the tip extends along the width direction of the tube.

As shown in FIGS. 6 and 7, the drive mechanism 22 includes a cam 221, a shaft member 222 connected to the cam 221 and serving as a rotation shaft, and a motor 223 for rotating the shaft member 222. In the present embodiment, the drive mechanism 22 is configured to include two shaft members 222 and a motor 223 corresponding to the clamp portions 20 arranged in two rows. The cam 221 for moving the pressing member 21 corresponding to the

tubes

131 and 135 in the vertical direction (first direction) is attached to the shaft member 222 of one row (the right row in FIG. 6), and the other row The cam 221 for moving the pressing member 21 corresponding to the

tubes

132, 133 and 134 in the vertical direction is attached to the shaft member 222 of the left row in FIG. Further, the plurality of cams 221 attached to one shaft member 222 are arranged such that the positions of the major diameter portions are mutually offset.

According to the drive mechanism 22 described above, the cam 221 is rotated by driving the motor 223 to rotate the shaft member 222. Then, as shown in FIGS. 7A and 8A, the pressing member 21 is moved upward by the pressing member 21 being pushed up by the long diameter portion of the cam 221, and FIGS. 7B and 7C. As shown in FIG. 8 (b), the pressing member 21 is moved downward by releasing the force with which the pressing member 21 is pushed up by the short diameter portion of the cam 221.

The pressing member 23 is disposed above the tube so as to face the pressing member 21 as shown in FIGS. 7 and 8. In the present embodiment, as shown in FIG. 1, the pressing member 23 is attached to the inner surface of the cassette lid 112 described later.

The guide member 30 is disposed in the vicinity of the clamp unit 20 as shown in FIGS. 4 and 5 and regulates the position of the tube. More specifically, the guide member 30 is a clamp portion 20 (pressing member 21 in each of the plurality of

tubes

131, 132, 133, 134, 135 of the liquid feeding / draining cassette 130 attached to the flow path opening / closing mechanism 1). Placed on both sides of In the present embodiment, since the clamp portions 20 are arranged in two rows, the guide members 30 are arranged in four rows.

The guide member 30 includes a rectangular plate-like guide member main body 31 and a groove 32 formed in the guide member main body 31, as shown in FIGS.
The guide member main body 31 is disposed so that the longitudinal direction intersects (orthogonal to) the extending direction of the tube. Moreover, the guide member 30 is arrange | positioned so that a plate surface may follow a perpendicular direction.

The groove portion 32 is formed to extend in the vertical direction (first direction) from a side edge located on the upper side in the guide member main body 31. Further, as shown in FIG. 9, the width D1 of the groove portion 32 is formed to have a portion having a width equal to or less than the outer diameter D2 of the tube in a non-tensioned state (natural state). The tube is held in the horizontal direction (second direction) intersecting (orthogonal) in the vertical direction (first direction) by the groove 32 by being pushed into the groove 32, and the position is regulated. Here, the width D1 of the groove 32 is, for example, the width of the central portion of the groove 32 in which the tube is held when the width of the groove 32 is different (expands in diameter) from the lower side to the upper side. Indicates
In the present embodiment, the width D1 of the groove 32 is formed to be smaller than the outer diameter D2 of the tube. Specifically, when the outer diameter D2 of the tube is 5 mm, the width D1 of the portion of the groove 32 that sandwiches the tube is preferably 3.5 mm to 5 mm, and more preferably 4 mm to 4.5 mm .

In the present embodiment, five grooves 32 are formed in one guide member 30 corresponding to the five

tubes

131, 132, 133, 134 and 135. That is, the position of one tube is restricted by the four guide members 30 (grooves 32). The two guide members 30 (grooves 32) among them hold the tube in the vicinity of the clamp 20 (pressing member 21).
The position where the guide member 30 is disposed is influenced by the diameter of the tube, but in the case of the above example (the tube outer diameter D2 is 5 mm), the range from 3.0 mm to 11.0 mm from the clamp portion 20 Preferably, the range is 5.0 mm to 9.0 mm. By setting the distance between the position where the guide member 30 is disposed and the clamp portion 20 in the above range, the shape of the tube can be suitably restored by the guide member 30 (the groove 32) as described later.

The flow path opening / closing mechanism 1 described above operates as follows.
First, the liquid feeding / draining cassette 130 is disposed in the flow path opening / closing mechanism 1. Here, as shown in FIGS. 4 and 5, the five

tubes

131, 132, 133, 134, and 135 respectively have the groove portions 32 of the guide member 30 in the vicinity of the clamp portion 20 (both sides of the clamp portion 20). Position is restricted. Further, as shown in FIG. 9, the width D1 of the portion of the groove 32 for holding the tube is smaller than the outer diameter D2 of the tube. Thereby, as shown in FIG. 10, in the groove portion 32, a force (tension) is applied to the tube in the horizontal direction (second direction) on the closing side (arrow direction in FIG. 10).

In this state, the drive mechanism 22 is operated. That is, by driving the motor 223 to rotate the shaft member 222, the cam 221 is rotated. Then, as shown in FIGS. 7A and 8A, the pressing member 21 is moved upward by the pressing member 21 being pushed up by the long diameter portion of the cam 221, and the tube is moved up and down (first direction). Press to. Thereby, the flow path of the tube is closed (see FIG. 10). Further, as shown in FIGS. 7B and 8B, when the cam 221 is further rotated and the short diameter portion of the cam 221 comes to a position corresponding to the pressing member 21, a force by which the pressing member 21 is pushed up. Is released and the pressing member 21 moves downward. Thereby, the pressure of the tube is released and the flow path is opened.

Here, in the present embodiment, the tube is pressed by the clamp unit 20 by arranging the guide member 30 in the vicinity of the clamp unit 20 and configuring the width D1 of the groove 32 to be equal to or less than the outer diameter D2 of the tube. In this case, in the groove 32, the tube can be restricted from spreading in the horizontal direction (second direction) intersecting with the vertical direction (first direction) pressed by the clamp 20 (see FIG. 10). Thereby, when the pressing of the tube by the clamp unit 20 is released, the horizontal expansion in the groove 32 is restricted by the tension (force applied to the closing side in the horizontal direction) generated in the tube, the vertical direction It can assist the restoring force of the part pressed by the Therefore, when the pressure is released, the shape of the tube is promptly restored, so it is possible to make it difficult to cause blocking of the flow passage due to deformation of the tube. In addition, by clamping the tube by the groove 32 in the vicinity of the clamp portion 20, when the flow path is closed by the clamp portion 20, the flow path can be pressed with high accuracy.

Moreover, in this embodiment, the position of the major-diameter part of the cam 221 arrange | positioned corresponding to the several tube 131,132,133,134,135 was shifted and attached to the shaft member 222. As shown in FIG. Thus, by appropriately setting the arrangement of the long diameter portion of the cam 221, only the flow path of one tube of the plurality of

tubes

131, 132, 133, 134, 135 is opened, and the flow of the other tubes The road is closed.

As shown in FIG. 1, the air pump 140 is disposed inside the dialyzer main body 110, and reciprocates the diaphragm 137 by bringing air into and out of the chamber 136. More specifically, the air pump 140 is connected to the through hole on the side of the chamber 136 to which the tube 139 is not connected via a tube (not shown). Then, the air in the chamber 136 is suctioned by the air pump 140, thereby drawing the diaphragm 137 toward the air pump 140 and suctioning the dialysate from any of the tubes into the chamber 136. Further, in this state, air is introduced into the interior of the chamber 136 to push the diaphragm 137 toward the tube 139 to deliver the aspirated dialysate into the interior of the chamber 136. Thereby, a fixed amount (volume of the chamber 136) of the dialysate is aspirated or delivered.

The cassette lid portion 112 is attached to the dialysis device main body 110 so as to be openable and closable, and covers the flow path opening / closing mechanism 1. The pressing member 23 for pressing the tube in the flow path opening / closing mechanism 1 is attached to the inner surface of the cassette lid portion 112 as described above.

The operation unit 150 includes a liquid crystal panel and various operation buttons. The liquid crystal panel displays various information such as the flow rate of the dialysate.

Next, an example of the operation of the above-described peritoneal dialysis apparatus 100 will be described.
When the peritoneal dialysis apparatus 100 is used, first, as shown in FIG. 4, the liquid feeding / draining cassette 130 is attached to the flow path opening / closing mechanism 1. Next, the heating / use dialysate bag 101, the replacement dialysate bag 102, the concentration change dialysate bag 103, and the plurality of

tubes

131, 132, 133, and 135 of the liquid feeding / draining cassette 130 are drained, respectively. Connect to the bag 104 and perform priming (see FIG. 2). Thereafter, the tube 134 is connected to the abdomen of the patient P and dialysis is started.

Here, in the case of performing dialysis, the air pump 140 is opened with the flow path of the predetermined tube (for example, the tube 131) opened by the flow path opening / closing mechanism 1 and the flow path of the other tubes closed. By suctioning the air inside the chamber 136, the dialysate (in this case, the dialysate contained in the heating dialysate bag 101) is sucked into the chamber 136 from the tube whose flow path is opened. Then, the flow path opening / closing mechanism 1 is operated to change the tube which opens the flow path (for example, the flow path of the tube 134 is opened and the flow path of the other tubes is closed). Air is delivered to the interior of the chamber 136 (in this case, the delivery of the dialysate into the peritoneal cavity of the patient P). Thereby, a fixed amount (volume of the chamber 136) of the dialysate is aspirated and delivered.

As described above, by repeating the above operation while changing the tube for opening the flow path by the flow path opening / closing mechanism 1, the dialysate is sent to the abdominal cavity of the patient P (liquid transfer step), the abdominal cavity of the patient P Of the dialysate (drainage) from the drainage and drainage of the collected dialysate (drainage) to the drainage bag 104 (draining step), dialysis from the dialysate bag 102 for replenishment to the dialysate bag for heating 101 Refilling of the fluid and replacement of the dialysate from the concentration change dialysate bag 103 to the heating dialysate bag 101 are performed.

According to the flow path opening / closing mechanism 1 and the peritoneal dialysis device 100 of the present embodiment described above, the following effects can be obtained.

(1) Clamping part 20 which opens / closes the flow path of the tube by advancing / retracting the pressing member 21 in the flow path opening / closing mechanism 1 in the vertical direction, and a guide member 30 which is disposed in the vicinity of the clamp part 20 and regulates the position of the tube. And the guide member 30 is configured to include the groove 32 which extends in the vertical direction and has a width D1 which is equal to or less than the outer diameter D2 of the tube. Thereby, when the tube is pressed by the clamp unit 20 by arranging the guide member 30 in the vicinity of the clamp unit 20 and configuring the width D1 of the groove 32 extending in the vertical direction to be equal to or less than the outer diameter D2 of the tube In the groove 32, the tube can be restricted from spreading in the horizontal direction intersecting the direction (vertical direction) pressed by the clamp 20. Thereby, when the pressing of the tube by the clamp unit 20 is released, the horizontal expansion in the groove 32 is restricted by the tension (force applied to the closing side in the horizontal direction) generated in the tube. The restoring force of the portion pressed in the direction can be assisted. Therefore, when the pressure is released, the shape of the tube is promptly restored, so it is possible to make it difficult to cause blocking of the flow passage due to deformation of the tube. Further, by holding the tube by the groove 32 in the vicinity of the clamp portion 20, the flow path can be pressed accurately when closing the flow path by the clamp portion 20, so that the liquid leaks out in the state where the flow path is closed. Can prevent That is, by arranging the groove 32 in the vicinity of the clamp 20 and holding the tube by the groove 32, when pressing the tube by the clamp 20 (pressing member 21), the position of the tube at the pressed portion is Since it is possible to prevent the displacement (the tube escapes from the pressing member 21), the flow passage can be suitably closed by the pressing member 21.

(2) The width D1 of the groove 32 is smaller than the outer diameter D2 of the tube. As a result, in the groove 32, a greater tension can be generated in the horizontal direction with respect to the tube. Therefore, the restoring force of the tube when the pressure is released (by the pressing member 21) can be further improved.

(3) The guide member 30 was arrange | positioned at the both sides (one end side and the other end side) of the clamp part 20 in a tube. Thus, the tube can be restricted from spreading in the horizontal direction on both sides of the portion of the tube pressed by the clamp portion 20, so that the resilience of the tube can be further improved when the press is released.

(4) The flow path opening / closing mechanism 1 is configured to include the plurality of clamp portions 20, and the guide member 30 is configured to include the plurality of groove portions 32 disposed corresponding to the plurality of clamp portions 20. Thereby, the flow path of the liquid which circulates a plurality of

tubes

131, 132, 133, 134, and 135 can be suitably opened and closed.

(5) The peritoneal dialysis device 100 is configured to include the flow path opening / closing mechanism 1 of the present embodiment. Thereby, even when the temperature of the use environment of the peritoneal dialysis device 100 is low, when the flow path is opened from the closed state of the flow path, the flow path can be less likely to be blocked due to the deformation of the tube. Therefore, it is possible to realize the peritoneal dialysis device 100 which can perform liquid feeding and drainage more suitably.

As mentioned above, although one preferable embodiment of the flow-path opening-closing mechanism 1 and the peritoneal dialysis apparatus 100 of this invention was described, this invention is not restrict | limited to embodiment mentioned above, It can change suitably.
For example, in the present embodiment, the flow path opening / closing mechanism 1 is configured to include the five clamp portions 20 that open and close the flow paths of the five tubes, but the present invention is not limited thereto. That is, the flow path opening / closing mechanism may be configured to include four or less clamp portions 20, and may be configured to include six or more clamp portions.

Further, in the present embodiment, the liquid feeding / draining cassette 130 is configured to include the chamber 136 and the diaphragm 137 to realize fixed amount of liquid feeding / liquid feeding, but the present invention is not limited thereto. That is, the liquid feeding / draining cassette may be configured to include a cylinder and a piston.

Moreover, although the flow-path opening-and-closing mechanism 1 was applied to the peritoneal dialysis apparatus 100 in this embodiment, it does not restrict to this. That is, the flow path opening / closing mechanism may be applied to an apparatus that causes a tube to flow a liquid different from the dialysate.

DESCRIPTION OF SYMBOLS 1 flow-path opening-and-closing mechanism 20 clamp part 21 pressing member 22 drive mechanism 30 guide member 32 groove part 130 liquid feeding / drainage cassette 131 tube 132 tube 133 tube 134 tube 135 tube 136 chamber 137 diaphragm 140 air pump

Claims

A flow path opening / closing mechanism for opening and closing a flow path of a liquid formed inside a flexible tube,
The pressing member has a pressing member capable of pressing the tube, and a drive mechanism for advancing and retracting the pressing member in the first direction, and the flow passage is closed by advancing the pressing member and the pressing member is retracted. A clamp that opens the flow path,
And a guide member that regulates the position of the tube in the vicinity of the clamp portion.
The guide member is
A guide member body,
A channel opening / closing mechanism that extends in the first direction and has a width equal to or less than the outer diameter of the tube in the guide member main body and sandwiches the tube in a second direction intersecting the first direction.
The flow path opening / closing mechanism according to claim 1, wherein a width of the groove portion is smaller than an outer diameter of the tube.
The flow path opening / closing mechanism according to claim 1 or 2, wherein the guide member is disposed at one end side and the other end side in the vicinity of the clamp portion in the tube.
A plurality of the clamps disposed corresponding to the plurality of tubes;
The flow path opening / closing mechanism according to any one of claims 1 to 3, wherein the guide member has a plurality of the groove portions arranged corresponding to a plurality of the clamp portions.
The flow path opening / closing mechanism according to claim 4;
A plurality of tubes each having one end connected to a dialysate supply source or a dialysate delivery destination, a chamber connected to the other end of the tube, and a liquid feeding / draining cassette provided with a diaphragm for dividing the inside of the chamber; ,
And d) an air pump which sucks or delivers a fixed amount of dialysate by reciprocating the diaphragm by taking air into and out of the chamber.