JP2015139560A - liquid circuit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid circuit, when being installed on a liquid processing apparatus, capable of preventing kink of a tube.SOLUTION: A liquid circuit 1 mounted on a blood purification device 100 and in which liquid is distributed, includes a tube 2 for distributing a liquid, and a frame panel 6 in which the tube 2 is disposed. The frame panel 6 includes: an opening part 9 formed on an arrangement passage of the tube 2; a locking piece 8a for locking the tube 2 at any one or both of an upstream side and a downstream side of the tube 2 in the opening part 9, from the opposite side of the frame panel 6; and an opening extension part 9a extending along the tube 2 locked from the opening part 9 to the locking piece 8a, towards a position facing the locking piece 8a.

Description

  The present invention relates to a liquid circuit mounted on a liquid processing apparatus.

  A liquid processing apparatus such as a blood purification apparatus used for dialysis treatment is equipped with a liquid circuit such as a blood circuit through which blood circulates and a fluid replacement circuit for supplementing a liquid with a chemical solution. The liquid circuit includes a heating unit for heating the liquid and a plurality of tubes connected to the heating unit, and the liquid processing apparatus includes a heater for heating the heating unit of the liquid circuit, And a clamp portion for clamping the tube of the liquid circuit. For this reason, when the liquid circuit is mounted on the liquid processing apparatus, it is necessary to accurately position the heating unit and the tube of the liquid circuit on the heater and clamp of the liquid processing apparatus. Therefore, a liquid circuit has been considered in which a heating unit and a tube are disposed on a frame panel formed of a hard resin and the tube is restrained by a locking piece formed on the frame panel (for example, Patent Document 1). reference).

JP 05-317418 A

  By the way, in a liquid circuit using a frame panel, a tube is disposed on the opposite side of the liquid processing apparatus with respect to the frame panel. Thus, an opening is formed in the frame panel, and the tube is inserted into the clamp portion by pushing the tube into the opening portion on the upstream side and the downstream side of the clamp portion. However, since the frame panel is formed of a hard resin, there is a problem that when the tube is pushed into the opening, the tube is kinked at the end of the opening.

  Moreover, since the positioning accuracy of a tube becomes low, so that the space | interval of a locking piece becomes wide, the locking piece is formed in the vicinity of the opening part. However, constraining the tube in the vicinity of the opening promotes tube kinking caused by pushing the tube into the opening.

  Accordingly, an object of the present invention is to provide a liquid circuit capable of preventing the tube from being kinked when mounted on a liquid processing apparatus.

  A liquid circuit according to the present invention is a liquid circuit that is attached to a liquid processing apparatus and through which a liquid flows, and includes a tube that distributes the liquid and a frame panel in which the tube is disposed. An opening formed in the arrangement path, a locking piece for locking the tube from the opposite side of the frame panel at one or both of the upstream and downstream sides of the tube at the opening, and locking from the opening And an opening extension extending toward a position facing the locking piece along the tube locked to the piece.

  According to the liquid circuit of the present invention, since the opening is formed in the frame panel, the tube can be pushed into the liquid processing apparatus from the opening when the frame is attached to the liquid processing apparatus. In addition, since the locking piece for locking the tube from the opposite side of the frame panel is formed on one or both of the upstream side and downstream side of the tube in the opening, the positioning accuracy of the tube in the vicinity of the opening is increased. can do. And since the opening extension part extended toward the opposing position with a latching piece is formed along the tube latched by the latching piece from the opening part, the tube was pushed into the liquid processing apparatus side from the opening part In this case, the tube can be released from the opening extension to the liquid processing apparatus side. Thereby, since the tube can be gently bent, it is possible to prevent the tube from kinking when the tube is attached to the liquid processing apparatus.

  The opening extension may extend from the opening to a position facing the locking piece along the tube locked to the locking piece. In this manner, the opening extension portion extends from the opening along the tube locked to the locking piece to the position facing the locking piece, so that the tube restrained by the locking piece on the frame panel can be It can escape to the liquid processing apparatus side appropriately.

  The opening extension may extend from the opening along the tube locked to the locking piece to a position beyond the position facing the locking piece. In this way, the opening extension portion extends from the opening portion along the tube locked to the locking piece to a position exceeding the position facing the locking piece, thereby being restrained by the locking piece on the frame panel. The existing tube can be appropriately released to the liquid processing apparatus side.

  The frame panel may be formed of a hard resin. As described above, since the frame panel is formed of the hard resin, the tubes can be arranged with higher accuracy, and thus the mounting property to the liquid processing apparatus can be improved.

  The opening extension may be narrower than the opening. Thus, by making the width of the opening extension portion narrower than the opening portion, it is possible to suppress a decrease in the rigidity of the frame panel while suppressing the kink of the tube.

  The locking piece is formed on both the upstream side and the downstream side of the tube in the opening, and may be disposed at a position where the tube can be locked in a state where the tube is linearly extended. In this way, the locking pieces are formed on both the upstream side and the downstream side of the tube in the opening, and are disposed at positions where the tube can be locked in a state where the tube is linearly extended, so that the vicinity of the opening is formed. The tube positioning accuracy can be further increased.

  In the liquid processing apparatus, an insertion groove into which a tube is inserted is formed, and a clamp portion that sandwiches the tube inserted into the insertion groove to prevent the flow of liquid, and the tube on the upstream side and the downstream side of the tube in the clamp portion. A pressing portion that presses and pushes into the insertion groove, and the opening may be formed at a position corresponding to the clamp portion and the pressing portion when the liquid circuit is attached to the liquid processing apparatus. Thus, when the liquid circuit is attached to the liquid processing apparatus, the opening is formed at a position where the clamp part and the pressing part are arranged, so that the liquid circuit can be easily positioned with respect to the liquid processing apparatus. . Moreover, when the tube is pushed from the opening into the insertion groove of the clamp by the pressing portion, the tube can be released from the opening extension to the liquid processing apparatus side. Thereby, it is possible to prevent the tube from kinking when the tube is attached to the liquid processing apparatus and inserted into the insertion groove of the clamp portion.

  The liquid circuit is attached to the blood purification apparatus, and the liquid may be either one or both of dialysate and replacement fluid used for dialysis treatment. By attaching such a liquid processing apparatus to the blood purification apparatus, the same effects as described above can be obtained.

  According to the present invention, the tube can be prevented from being kinked when mounted on the liquid processing apparatus.

It is a perspective view of the blood purification apparatus which can mount | wear with the liquid circuit which concerns on embodiment. It is the figure which looked at the clamp part from the side of the blood purification apparatus. It is the figure which looked at the liquid circuit which concerns on embodiment from the surface side. It is the figure which looked at the liquid circuit which concerns on embodiment from the back surface side. It is the partially expanded view which looked at the liquid circuit which concerns on embodiment from the back surface side. It is a partially expanded view which shows the state which mounted | wore the blood purification apparatus with the liquid circuit. It is the figure which showed the state which has not clamped the tube by the clamp part. It is the figure which showed the state which clamps the tube with a clamp part. It is a partial cross section figure which shows the state which the cover part of the blood purification apparatus opened. It is a partial cross section figure which shows the state which the cover part of the blood purification apparatus closed. It is a partial cross section figure which shows the state where the cover part of the blood purification apparatus was closed at the time of using the liquid circuit in which the opening extension part is not formed.

  Hereinafter, preferred embodiments of the liquid circuit according to the present invention will be described in detail. The “liquid” used in the present embodiment is a liquid used for medical purposes, and can be, for example, one or both of a dialysate and a replacement fluid used for dialysis treatment, blood, or the like. Moreover, the same code | symbol shall be attached | subjected to the same or an equivalent part in all the figures.

[Blood purification device]
As shown in FIG. 1, the liquid circuit 1 according to the present embodiment is a circuit through which a replacement fluid and a dialysis fluid circulate, and is used by being mounted on a blood purification device 100 that is one of the liquid processing devices. The blood purification apparatus 100 is erected on the side of the apparatus main body 101, an operation panel 103 disposed above the apparatus main body 101, and a liquid storage bag. And a suspended pole 104.

  The apparatus main body 101 includes a front part 110 and a side part 111, and a blood circuit 120 is attached to a predetermined position of the front part 110. The front portion 110 is provided with various clamps that open and close a tube serving as a flow path of the blood circuit 120, a roller pump that pumps liquid, a pressure sensor that detects fluid pressure, a filter holder that holds a filtration membrane module, and the like. .

  The side surface portion 111 is provided with a door 112 that opens and closes, and a mounting portion 113 to which the liquid circuit 1 is mounted is formed in a portion facing the door 112. In addition, three roller pumps 114 are arranged in the upper portion of the side surface portion 111 and exposed from the door 112. The tube 2 of the liquid circuit 1 is wound around each roller pump 114 about a half circumference, and the rotating roller pump 114 transfers the liquid while squeezing the flexible tube 2.

  The mounting portion 113 includes a boss portion 115 that positions the liquid circuit 1, a heater 116 that heats the liquid flowing through the liquid circuit 1, a clamp portion 117 that clamps the tube 2 of the liquid circuit 1, and the liquid circuit 1. And a fixing lever 119 for fixing to the mounting portion 113.

  The heater 116 is formed in a vertically long rectangular shape and is disposed at a substantially central portion of the mounting portion 113. The structure of the heater 116 is not particularly limited. For example, the heater 116 can generate heat when energized.

  The boss portion 115 is disposed below the heater 116 and protrudes from the mounting portion 113.

  The fixing lever 119 is disposed above the heater 116 and protrudes from the mounting portion 113, and a hook-like (key-like) locking portion 119 a protruding downward is formed at the tip portion thereof. The fixing lever 119 is attached to the mounting portion 113 so that the locking portion 119a moves up and down, and the locking portion 119a moves downward by an elastic member (not shown) such as a spring. It is so energized.

  The clamp portions 117 are provided at three locations around the heater 116. More specifically, the clamp part 117 is provided at two positions on the right side of the heater 116, and the clamp part 117 is provided at one position on the left side of the heater 116. In addition, all the clamp parts 117 provided in these three places have the same structure.

  As shown in FIGS. 1 and 2, the clamp portion 117 protrudes from the mounting portion 113 to the side of the blood purification device 100. The clamp part 117 is arranged in the inner peripheral space of the first fixing part 117a having a semispherical cross section, the second fixing part 117b having a semicircular arc cross section disposed opposite to the first fixing part 117a, and the second fixing part 117b. A movable portion 117c having a hemispherical cross section.

  The first fixing portion 117a and the second fixing portion 117b are fixed to the mounting portion 113, and an insertion groove 117d into which the tube 2 is inserted is formed between the first fixing portion 117a and the second fixing portion 117b. ing. The insertion groove 117d extends linearly in the vertical direction of the blood purification apparatus 100. The first fixing portion 117a is formed with a convex portion 117e that protrudes toward the second fixing portion 117b, and the insertion groove 117d is partially narrowed by the convex portion 117e. The movable portion 117c includes a second fixed portion 117b having a semicircular cross section disposed opposite to the first fixed portion 117a, and a first fixed portion so as to protrude from the inner circumferential space of the second fixed portion 117b into the insertion groove 117d. It can move to the 117a side and the second fixed portion 117b side. When the movable portion 117c moves toward the first fixed portion 117a and comes out of the insertion groove 117d, the interval between the first fixed portion 117a (convex portion 117e) and the movable portion 117c becomes narrow, so that the movable portion 117c is inserted into the insertion groove 117d. The tube 2 is clamped (see FIG. 8). On the other hand, when the movable portion 117c moves to the second fixed portion 117b side and retracts into the inner peripheral space of the second fixed portion 117b, the interval between the first fixed portion 117a (convex portion 117e) and the movable portion 117c increases. The clamp of the tube 2 inserted into the insertion groove 117d is released (see FIG. 7). Thus, the clamp part 117 can pinch the tube 2 inserted in the insertion groove 117d, and can prevent the flow of liquid.

  The door 112 is provided with a pressing portion 118 that pushes the tube 2 into the insertion groove 117d of the clamp portion 117 when the door 112 is closed. The pressing part 118 is a part protruding from the door 112 in a plate shape. A pair of pressing portions 118 are provided for one clamp portion 117. The pair of pressing portions 118 are arranged at positions on the upstream side and the downstream side of the tube 2 inserted into the insertion groove 117d with respect to the clamp portion 117 when the door 112 is closed. For this reason, by closing the door 112, the pair of pressing portions 118 can press the tube 2 on the upstream side and the downstream side of the tube 2 in the clamp portion 117.

[Liquid circuit]
As shown in FIGS. 1, 3 and 4, the liquid circuit 1 includes a flexible tube 2 made of polyvinyl chloride or the like. Further, the liquid circuit 1 has a heating flow path portion 4A for heating the passing liquid and a pressure feeding flow path portion 4B for pumping the liquid by being set on the roller pump 114 in accordance with the functional role thereof. And a measuring flow path portion 4C for measuring the liquid. The heating channel 4A, the pressure feeding channel 4B, and the metering channel 4C are connected by a tube 2. The heating channel 4A is disposed in the center of the liquid circuit 1, and the pressure-feed channel 4B and the metering channel 4C are arranged at both ends of the liquid circuit 1 with the heating channel 4A interposed therebetween. Is arranged.

  As shown in FIG. 3 and FIG. 4, the heating flow path section 4 </ b> A is a liquid between the heating section 5 formed in a vertically long rectangular shape and the heating section 5 connected to the heating section 5. The tube 2 which distribute | circulates, the heating part 5, and the rectangular frame-shaped frame panel 6 holding a tube are provided. The heating unit 5 is blow-molded with PP, for example, and the frame panel 6 is injection-molded with ABS, for example.

  The heating unit 5 has a liquid channel formed therein and is heated by the heater 116. The warming section 5 is formed with meandering flow paths 5a for increasing the contact surface with the heater 116 in two rows on the left and right, and the two rows of meandering flow paths 5a have tubes respectively at the inlet and the outlet. 2 is connected. For this reason, the tube 2 can circulate a liquid between the meandering flow paths 5a. In the vicinity of the four corners (corner portions) of the heating unit 5, there are provided hooking holes (not shown) on which the frame panel 6 is hooked.

  The frame panel 6 surrounds and holds the outer periphery of the heating unit 5, and the tube 2 is disposed on the surface side thereof. The frame panel 6 is formed of a hard resin into a vertically long rectangular frame shape, and a central opening 7 in which the heating unit 5 is disposed is formed at the center of the frame panel 6. Of the pair of upper and lower short sides 6a, 6b of the frame panel 6, the pressure-feed passage portion 4B is disposed on one (upper) short side 6a side via the tube 2, and the other (lower) short side. On the 6b side, the measuring flow path portion 4C is arranged through the tube 2.

  The central opening 7 is formed at a position corresponding to the heater 116. Here, the position corresponding to the heater 116 refers to a direction in which the mounting portion 113, the heating channel portion 4A, and the door 112 are overlapped when the liquid circuit 1 is mounted on the mounting portion 113 of the apparatus main body 101. (In side view) refers to a position overlapping the heater 116. The central opening 7 corresponds to the outer shape of the heating unit 5, and the heating unit 5 is set so as to close the central opening 7 on the surface side of the frame panel 6. At two places along the upper edge of the central opening 7 and at two places along the lower edge, claw parts (not shown) for hooking on the retaining holes of the heating part 5 are provided. For this reason, by hooking the nail | claw part of the frame panel 6 to the latching hole of the heating part 5, the heating part 5 can be attached to the frame panel 6, and the nail | claw part of the frame panel 6 is attached to the latching hole of the heating part 5. It is possible to easily remove the heating unit 5 from the frame panel 6 by removing from the frame panel 6.

  As shown in FIGS. 3 to 8, the frame panel 6 has an opening 9 formed in a vertically long and substantially rectangular shape. The opening 9 is formed at a position corresponding to the clamp part 117 and the pressing part 118. Here, the positions corresponding to the clamp unit 117 and the pressing unit 118 are the mounting unit 113 and the heating channel when the liquid circuit 1 is mounted on the mounting unit 113 of the apparatus main body 101 and the door 112 is closed. In the direction in which the portion 4A and the door 112 are overlapped (in a side view), it refers to a position overlapping the clamp portion 117 and the pressing portion 118. More specifically, the opening 9 is formed at two locations on the right and left of the central opening 7 in the frame panel 6, and the opening 9 is located on the left of the central opening 7 in the frame panel 6. It is formed in the place. The opening 9 passes through the frame panel 6. For this reason, by closing the door 112, the tube 2 disposed in the opening 9 can be pushed from the opening 9 into the insertion groove 117d of the clamp 117 by the pressing portion 118.

  On the surface of the frame panel 6, a plurality of locking pieces 8 that lock the tube 2 by locking the tube 2 are provided. The locking piece 8 is also called a hook. The locking piece 8 locks the tube 2 so that the opening 9 becomes the arrangement path of the tube 2, in other words, the opening 9 is formed in the arrangement path of the tube 2. Here, since the opening 9 is formed in the arrangement path of the tube 2, the interval between the locking pieces 8 is increased in the vicinity of the opening 9, and the positioning accuracy of the tube 2 is lowered. For this reason, a part of the plurality of locking pieces 8 is formed in the vicinity of each opening 9 and on both the upstream side and the downstream side of the tube 2 in each opening 9. The pair of locking pieces 8 formed in the vicinity of each opening 9 is particularly referred to as a locking piece 8a. The locking piece 8a is arranged at a position where the tube 2 can be locked in a state where the tube 2 is linearly extended in the opening 9. The locking piece 8a does not necessarily have to be formed on both the upstream side and the downstream side of the tube 2 in the opening 9, and only on either the upstream side or the downstream side of the tube 2 in the opening 9. It may be formed.

  The frame panel 6 is formed with an opening extension 9a extending from the opening 9 toward the position facing the locking piece 8a along the tube 2 locked to the pair of locking pieces 8a. . The position facing the locking piece 8a refers to a position that overlaps with the locking piece 8a in the direction in which the mounting portion 113, the heating channel portion 4A and the door 112 are overlapped (in side view).

  The opening extension 9a extends to a position beyond the position facing the locking piece 8a. However, the opening extension 9a does not necessarily extend to a position exceeding the position facing the locking piece 8a. For example, the opening piece 9a may extend only to a position facing the locking piece 8a. It does not have to extend until just before the opposite position.

  The width of the opening extension 9 a in the left-right direction is wider than the diameter of the tube 2. Here, the width in the left-right direction is a dimension in a direction orthogonal to the extending direction of the tube 2 passing through the opening 9, and is a dimension in the left-right direction in FIG. The opening extension 9 a is narrower in the left-right direction than the opening 9. And the locking piece 8a formed in the upstream part of the tube 2 in the opening part 9 and the locking piece 8a formed in the downstream part of the tube 2 in the opening part 9 are reversed right and left with respect to the opening extension part 9a. Is formed. That is, in FIG. 7, the locking piece 8 a formed on the upstream side of the tube 2 in the opening portion 9 is connected to the frame panel 6 on the left side of the opening extension portion 9 a and to the right side so as to straddle the tube 2. The locking piece 8a formed on the downstream side of the tube 2 in the opening 9 is connected to the frame panel 6 on the right side of the opening extension 9a, and leftward so as to straddle the tube 2 It extends toward.

  Next, a state when the liquid circuit 1 is attached to the blood purification apparatus 100 and the door 112 is closed will be described.

  First, the liquid circuit 1 is attached to the attachment part 113 of the blood purification apparatus 100. In mounting the liquid circuit 1, the lower end portion of the frame panel 6 is positioned by the boss portion 115, and the upper end portion of the frame panel 6 is locked by the locking portion 119 a of the fixing lever 119, thereby attaching the frame panel 6 to the mounting portion 113. Secure to. Thereby, the heating part 5 is arrange | positioned in the position corresponding to the heater 116, the opening part 9 is arrange | positioned in the position corresponding to the clamp part 117 and the press part 118, and the tube 2 which passes the opening part 9 inserts the clamp part 117. It arrange | positions in the position corresponding to the groove | channel 117d. At this time, as shown in FIG. 9, the tube 2 is disposed on the opposite side of the clamp portion 117 with respect to the frame panel 6.

  Next, the door 112 is closed. Then, as shown in FIG. 10, the tube 2 passing through the opening 9 is pushed into the blood purification device 100 side from the opening 9 by the pair of pressing portions 118. At this time, the tube 2 pushed into the opening 9 by the pair of pressing portions 118 can escape from the opening extension 9a to the blood purification device 100 side, and thus is gently bent.

  On the other hand, when the opening extension 9a is not formed, the distance between the pair of pressing portions 118 and the end of the opening 9 is shortened as shown in FIG. For this reason, when the tube 2 passing through the opening 9 is pushed into the blood purification device 100 side from the opening 9 by the pair of pressing portions 118, the tube 2 is bent sharply at the edge portion of the opening 9. The tube 2 may be kinked at the edge portion 9.

  As described above, according to the liquid circuit 1 according to the present embodiment, since the opening 9 is formed in the frame panel 6, when the blood purification device 100 is mounted, the tube 2 is connected to the blood purification device from the opening 9. It can be pushed into the 100 side. Further, since the opening 9 is formed at a position where the clamp part 117 and the pressing part 118 are arranged when the liquid circuit 1 is mounted on the blood purification apparatus 100, the positioning of the liquid circuit 1 with respect to the blood purification apparatus 100 is performed. It can be done easily. Moreover, since the locking piece 8a which locks the tube 2 from the opposite side of the frame panel 6 is formed on both the upstream side and the downstream side of the tube 2 in the opening 9, the tube positioning accuracy in the vicinity of the opening 9 is formed. Can be high.

  And since the opening extension part 9a extended toward the opposing position with the latching piece 8a along the tube 2 latched by the latching piece 8a from the opening part 9 is formed, the tube 2 is removed from the opening part 9 When the tube 2 is pushed into the insertion groove 117d of the clamp portion 117 disposed on the blood purification device 100 side, the tube 2 can be released from the opening extension 9a to the blood purification device 100 side. Thereby, since the tube 2 can be gently bent, it is possible to prevent the tube 2 from being kinked when mounted on the blood purification apparatus 100.

  Further, the opening extension 9a extends from the opening 9 to the position facing the locking piece 8a along the tube 2 locked to the locking piece 8a, and further beyond the position facing the locking piece 8a. The tube 2 that is restrained by the locking piece 8a on the frame panel 6 can be appropriately released to the blood purification apparatus 100 side.

  Further, the locking piece 8a is formed on both the upstream side and the downstream side of the tube 2 in the opening 9, and the tube 2 is disposed at a position where the tube 2 can be locked in a linearly extended state. The positioning accuracy of the tube 2 in the vicinity of 9 can be further increased.

  In addition, since the frame panel 6 is formed of a hard resin, the tube 2 can be disposed with higher accuracy, so that the attachment to the blood purification apparatus 100 can be improved.

  Moreover, it can suppress that the rigidity of the frame panel 6 falls, suppressing the kink of the tube 2 by making the width | variety of the opening extension part 9a narrower than the opening part 9. FIG.

  The preferred embodiment of the present invention has been described above, but the present invention is not limited to the above embodiment. For example, in the above-described embodiment, the blood purification apparatus is described as an example of the liquid processing apparatus to which the liquid circuit is attached. However, the liquid processing apparatus is not limited to the blood purification apparatus.

DESCRIPTION OF SYMBOLS 1 ... Liquid circuit, 2 ... Tube, 4A ... Heating flow path part, 4B ... Pressure feed flow path part, 4C ... Measurement flow path part, 5 ... Heating part, 5a ... Serpentine flow path, 6 ... Frame panel 6a, 6b ... short side, 7 ... central opening, 8 ... locking piece, 8a ... locking piece, 9 ... opening, 9a ... opening extension, 100 ... blood purification device, 101 ... device body, 102 ... Carriage part 103 ... Operation panel 104 ... Pole 110 ... Front part 111 ... Side part 112 ... Door 113 113 Mounting part 114 ... Roller pump 115 ... Boss part 116 ... Heater 117 ... Clamp part 117a ... first fixing portion, 117b ... second fixing portion, 117c ... movable portion, 117d ... insertion groove, 117e ... convex portion, 118 ... pressing portion, 119 ... fixing lever, 119a ... locking portion, 120 ... blood circuit.

Claims (8)

A liquid circuit that is mounted in a liquid processing apparatus and in which a liquid flows,
A tube for circulating the liquid;
A frame panel on which the tube is disposed;
With
The frame panel is
An opening formed in an arrangement path of the tube;
A locking piece for locking the tube from the opposite side of the frame panel at one or both of the upstream side and the downstream side of the tube at the opening;
An opening extension extending from the opening to the position facing the locking piece along the tube locked to the locking piece;
Having
Liquid circuit. The opening extension extends from the opening to a position facing the locking piece along the tube locked to the locking piece.
The liquid circuit according to claim 1. The opening extension extends from the opening along the tube locked to the locking piece to a position exceeding the position facing the locking piece.
The liquid circuit according to claim 1. The frame panel is formed of a hard resin,
The liquid circuit as described in any one of Claims 1-3. The opening extension is narrower than the opening;
The liquid circuit as described in any one of Claims 1-4. The locking piece is formed on both the upstream side and the downstream side of the tube in the opening, and is arranged at a position where the tube can be locked in a linearly extended state.
The liquid circuit as described in any one of Claims 1-5. The liquid processing apparatus includes:
An insertion groove into which the tube is inserted is formed, and a clamp part that can sandwich the tube inserted into the insertion groove and prevent the liquid from flowing therethrough,
A pressing part that presses the tube into the insertion groove by pressing the tube on the upstream side and the downstream side of the tube in the clamp part;
With
The opening is formed at a position corresponding to the clamp part and the pressing part when the liquid circuit is attached to the liquid processing apparatus.
The liquid circuit as described in any one of Claims 1-6. The liquid circuit is attached to a blood purification device;
The liquid is one or both of a dialysate and a replacement fluid used for dialysis treatment.
The liquid circuit as described in any one of Claims 1-7.

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