JP2008002388A - Squeezing pump and method for mounting flexible tube - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the workability of mounting a flexible tube in a mounting depression part and prevent the breakage of the flexible tube and a rotor. <P>SOLUTION: In a squeezing pump provided with a stator 6 having the mounting depression part R in which the flexible tube D is mounted, an upstream side gripping means 9 and a downstream side gripping means 10 gripping the upstream side and the downstream side of the flexible tube D, respectively, a rotor 7 capable of being driven and rotated in the mounting depression part R, and a roller compressing the flexible tube D mounted in the mounting depression part R in a radial direction and squeezing the same in a longitudinal direction accompanied by the rotation of the rotor 7, the upstream side gripping means 9 fixes the flexible tube D and regulates the movement of the same in a longitudinal direction and the upstream side griping means 10 grips the flexible tube R while allowing the movement of the flexible tube R in the longitudinal direction by a rotation drive force of the rotor 7. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an ironing type pump for causing a fluid to flow in the flexible tube by compressing the flexible tube capable of flowing a fluid such as blood in a radial direction, and the flexible tube. It relates to the mounting method.

  Generally, in dialysis treatment, a blood circuit composed of a flexible tube is used to circulate a patient's blood extracorporeally. This blood circuit is mainly composed of an arterial blood circuit in which an arterial puncture needle for collecting blood from a patient is attached to the tip, and a venous blood circuit in which a venous puncture needle for returning blood to the patient is attached to the tip. The dialyzer is interposed between the arterial blood circuit and the venous blood circuit to purify blood circulating outside the body.

  A part of the arterial blood circuit is connected to a flexible tube that is softer and thicker than the others, and such a part is configured to be attached to the ironing blood pump disposed in the dialysis machine. . This ironing type blood pump usually has a stator having a mounting recess to which a flexible tube can be attached, clamping means capable of firmly holding the flexible tube attached to the mounting recess, and rotation within the mounting recess. It is mainly composed of a rotor that can be driven, and a roller that is formed on the roller and compresses the flexible tube.

  To attach a flexible tube to a squeezed blood pump, it has been necessary for an operator such as a medical worker to manually rotate the rotor along the inner peripheral wall surface of the mounting recess while gradually rotating the rotor by hand. was there. In other words, there is only a small clearance between the inner peripheral wall surface of the mounting recess and the roller to compress the flexible tube when the rotor is driven, so that the flexible tube is inserted through the clearance. The rotor was rotated by hand little by little, and was attached to the entire mounting recess. In addition, since this prior art does not relate to the literature known invention, there is no prior art document information to be described.

  However, in the conventional ironing type pump, since it is necessary to attach the flexible tube to the mounting recess while rotating the rotor little by little by hand, there is a problem that the mounting work is troublesome and troublesome. Also, if the rotor is driven to rotate while the flexible tube is not properly mounted in the mounting recess, the guide pin may bite the flexible tube, and the flexible tube and the rotor will be damaged. There was a fear.

  The present invention has been made in view of such circumstances, and can improve the mounting workability of the flexible tube with respect to the mounting recess and can prevent damage to the flexible tube and the rotor. It is to provide a mold pump and a method for attaching the flexible tube.

  According to the first aspect of the present invention, there is provided a stator having a mounting recess to which a flexible tube capable of flowing a fluid such as blood is attached, and the flexible tube in a state in which the flexible tube is attached to the mounting recess. An upstream side clamping means for clamping the upstream side of the tube, a downstream side clamping means for clamping the downstream side, a rotor capable of being driven to rotate within the mounting recess, and the rotor formed in the mounting recess and attached to the mounting recess In the ironing pump comprising a roller for flowing a fluid in the flexible tube by compressing the flexible tube in a radial direction while compressing the flexible tube in a longitudinal direction as the rotor rotates, the upstream side The sandwiching means fixes the flexible tube and restricts movement in the longitudinal direction, and the downstream sandwiching means is configured so that the longitudinal direction of the flexible tube is driven by the rotational driving force of the rotor. While permitting movement of the direction, characterized in that sandwich.

  According to a second aspect of the present invention, in the ironing type pump according to the first aspect, the rotor is provided with a guide pin that protrudes toward the inner peripheral wall surface of the mounting recess, and the protrusion and inner periphery of the guide pin. The clearance between the wall surfaces is set such that the flexible tube to be attached can be inserted in a state of being elastically deformed in the radial direction.

  According to a third aspect of the present invention, in the ironing type pump according to the first or second aspect, the cover is attached to the stator so as to be openable and closable, and covers the mounting recess in the closed state. And a pressing projection that can press the flexible tube clamped by the upstream clamping unit and the downstream clamping unit from above.

  According to a fourth aspect of the present invention, in the ironing pump according to any one of the first to third aspects, the detecting pump includes a detecting unit that detects a rotational position of the rotor, and based on detection of the detecting unit. The rotor is stopped at a predetermined position.

  According to a fifth aspect of the present invention, there is provided a stator having a mounting recess to which a flexible tube capable of flowing a fluid such as blood is attached, a rotor that can be driven to rotate in the mounting recess, and the rotor. And a roller for causing fluid to flow in the flexible tube by compressing the flexible tube attached to the attachment recess in the longitudinal direction as the rotor rotates while compressing the flexible tube in the radial direction. In the flexible tube mounting method of the ironing pump, the flexible tube is routed along the inner peripheral wall surface of the mounting recess while the rotor is driven to rotate, and the upstream side of the flexible tube is fixed. The downstream side is allowed to move in the longitudinal direction by rotational driving of the rotor.

  According to the first and fifth aspects of the present invention, the upstream flexible tube to be attached to the attachment recess is fixed to restrict the movement in the longitudinal direction, and the downstream driving force is controlled by the rotational driving force of the rotor. Since the flexible tube is allowed to move in the longitudinal direction, the flexible tube is attached to the stator mounting recess by rotating the rotor along the inner peripheral wall surface of the mounting recess while rotating the rotor. be able to. Therefore, the workability of attaching the flexible tube to the attachment recess can be improved.

  At the same time, the flexible tube can be mounted on the mounting recess of the stator by simply rotating the rotor while rotating the flexible tube along the inner peripheral wall surface of the mounting recess. It is possible to prevent the flexible tube and the rotor from being damaged by suppressing the guide pin from biting the flexible tube.

  According to the invention of claim 2, the clearance between the protruding end of the guide pin protruding from the rotor and the inner peripheral wall surface of the stator is set so that it can be inserted in a state where the flexible tube to be attached is elastically deformed in the radial direction. Therefore, when the flexible tube is attached to the attachment recess, the guide pin can be prevented from biting the flexible tube, and the flexible tube and the guide pin can be prevented from being damaged. .

  According to the invention of claim 3, since the pressing convex portion formed on the cover presses the holding portion of the flexible tube from above with the cover closed, the upstream holding means and The holding of the flexible tube by the downstream side holding means can be assisted.

  According to the invention of claim 4, since the rotor is stopped at a predetermined position based on the detection by the detection means, the next time the flexible tube is attached to the attachment recess, the desired position can be easily attached. It is possible to improve the mounting workability.

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
The ironing type pump according to the first embodiment causes blood to flow in the blood circuit by compressing the flexible tube constituting a part of the blood circuit for circulating blood extracorporeally in the radial direction. This is applied to the ironing blood pump. Hereinafter, a hemodialysis apparatus (including a blood circuit) to which the perforated blood pump is applied will be described.

  As shown in FIG. 1, the hemodialysis apparatus mainly includes a blood circuit 1 to which a dialyzer 2 is connected, and a dialyzer body 5 that removes water while supplying dialysate to the dialyzer 2. As shown in the figure, the blood circuit 1 is mainly composed of an arterial blood circuit 1a and a venous blood circuit 1b made of a flexible tube. The arterial blood circuit 1a and the venous blood circuit 1b A dialyzer 2 is connected between them.

  The dialyzer 2 is formed by housing a plurality of hollow fibers in which micropores (pores) are formed in a casing portion, and the blood inlet port 2a, blood outlet port 2b, dialysate inlet port are provided in the casing portion. 2c and dialysate outlet port 2d are formed, and the blood introduction port 2a is connected to the proximal end of the arterial blood circuit 1a, and the blood outlet port 2b is connected to the proximal end of the venous blood circuit 1b. Yes. The dialysate introduction port 2c and the dialysate lead-out port 2d are connected to a dialysate introduction line L1 and a dialysate discharge line L2 extending from the dialyzer body 6, respectively.

  An arterial puncture needle a is connected to the tip of the arterial blood circuit 1a, and a squeezed blood pump 3 is disposed in the middle, while the venous blood circuit 1b has a venous side at the tip. The puncture needle b is connected, and a drip chamber 4 for removing bubbles is connected on the way. When the blood pump 3 is driven while the patient is punctured with the arterial puncture needle a and the venous side puncture needle b, the blood of the patient reaches the dialyzer 2 through the arterial blood circuit 1a. After the blood purification is performed by the above, the air is removed in the drip chamber 4 and returned to the patient's body through the venous blood circuit 1b. That is, the blood of the patient is purified by the dialyzer 2 while circulating outside the body by the blood circuit 1.

  On the other hand, as shown in FIG. 2, a flexible tube D that is softer and thicker than the others is connected to a part of the arterial blood circuit 1a, and this portion (flexible tube D) is connected to dialysis. It is configured to be attached to the ironing blood pump 3 disposed in the apparatus body 5. As shown in FIGS. 3 and 4, the ironing blood pump 3 includes a stator 6, a rotor 7 that can be driven to rotate within the stator 6, a roller 8 formed on the rotor 7, and a pair of upper and lower guide pins. 11a and 11b, a cover 12, an upstream side clamping means 9, and a downstream side clamping means 10 are mainly configured.

  The stator 6 is formed with an attachment recess R to which the flexible tube D is attached, and is configured such that the flexible tube D is attached along the inner peripheral wall surface 6a that forms the attachment recess R. In the approximate center of the mounting recess R, a rotor 7 that can be driven to rotate about the rotation axis L1 by the motor 13 is disposed. A pair of rollers 8 and guide pins 11a and 11b are disposed on a side surface of the rotor 7 (a surface facing the inner peripheral wall surface 6a).

  The roller 8 is rotatable about a rotation axis L2 formed on the outer edge side of the rotor 7, and the roller 8 of the rotor 7 is compressed while radially compressing the flexible tube D attached to the attachment recess R. By squeezing in the longitudinal direction (blood flow direction) with rotation, blood can flow in the blood circuit 1. That is, when the flexible tube D is mounted in the mounting recess R and the rotor 7 is driven to rotate, the flexible tube D is compressed between the roller 8 and the inner peripheral wall surface 6a as shown in FIG. In addition, the rotational direction (longitudinal direction) of the rotor 7 can be squeezed as the rotor 7 is driven to rotate. Such ironing action causes blood in the blood circuit 1 to flow in the direction of rotation of the rotor 7, so that it can be circulated extracorporeally in the blood circuit 1.

  The upstream clamping means 9 is for clamping the upstream side of the flexible tube D to be attached (this is referred to as the upstream attachment part D1). As shown in FIGS. It consists of a plate that can swing around L3. The upstream clamping means 9 is relatively strongly urged in the clamping direction by the torsion spring S, and firmly clamps and fixes the upstream mounting portion D1 (the left and right directions and the longitudinal direction of the upstream mounting portion D1 in FIG. 4). Can be controlled).

  The downstream clamping means 10 is for clamping the downstream side of the flexible tube D to be attached (this is referred to as a downstream attachment part D2), and is composed of a pair of left and right roller members 10. These roller members 10 are disposed so as to be opposed to each other on both side surfaces of the downstream side attachment portion D2, and each roller member 10 is rotatable about the rotation axis La, and is separated from the pair of roller members 10. It is comprised so that the downstream attachment site | part D2 may be penetrated and clamped.

  The separation dimension of the pair of roller members 10 is set to be slightly smaller than the outer diameter of the downstream attachment portion D2, and allows the movement in the longitudinal direction while restricting the movement of the downstream attachment portion D2 in the left-right direction in FIG. And can be pinched. That is, when a load in the longitudinal direction is applied to the downstream attachment portion D2 sandwiched by the downstream sandwiching means 10, the roller member 10 rotates and is allowed to move in that direction.

  As shown in FIG. 5, the guide pins 11a and 11b are formed of pin-like members that protrude from the upper end side and the lower end side of the rotor 7 toward the inner peripheral wall surface 6a, and are flexible between them. The sex tube D will be held. That is, when the rotor 7 is driven, the flexible tube D is held at the normal position by the upper and lower guide pins 11a and 11b, and is not separated from the mounting recess R by the upper guide pin 11a.

  In this embodiment, as shown in the figure, the clearance t1 between the protruding end of the upper guide pin 11a and the inner peripheral wall surface 6a is between the protruding end of the lower guide pin 11b and the inner peripheral wall surface 6a. The clearance t2 is set to be larger than the clearance t2. In particular, the clearance t1 is set so as to be inserted in a state where the flexible tube D to be attached is elastically deformed in the radial direction. That is, when the flexible tube D reaches the clearance t1, the flexible tube D is bitten in the conventional case, whereas according to the present embodiment, the flexible tube D is inserted in a state of being elastically deformed in the radial direction. Since the dimensions are possible, biting is suppressed.

  The insertable dimension t1 is configured so that the flexible tube D is compressed in the radial direction by the guide pin 11a and is inserted in an elastically deformed state so that it can escape upward or downward with respect to the mounting recess R. It's enough. As a result, when the flexible tube D is mounted in the mounting recess R, the guide pin 11a is prevented from biting the flexible tube D, and the flexible tube D and the guide pin 11a are prevented from being damaged. can do.

  Since the lower guide pin 11b is the side where the flexible tube D is not attached or detached (the bottom side of the attachment recess R), its protruding dimension is not considered, but for example, the guide It is good also as a protrusion dimension substantially the same as the pin 11a. Further, if a projecting member that is flexible and bendable in place of the guide pins 11a and 11b, the projecting dimension of the guide pin is not considered so much, and the flexible tube D can be mounted to the mounting recess R at the time of mounting. Biting of the flexible tube D can be prevented.

  The cover 12 is attached to the stator 6 so as to be openable and closable, and covers the mounting recess R in a closed state, and can prevent entry of foreign matter or the like into the mounting recess R when the rotor 7 is driven to rotate. is there. As shown in FIG. 4, the cover 12 has a flexible tube D (specifically, upstream side) sandwiched between the upstream side clamping means 9 and the downstream side clamping means 10 with the cover 12 closed. A pressing convex portion 12a is formed that can press the attachment portion D1 and the vicinity of the downstream attachment portion D2) from above.

  As a result, by simply closing the cover 12, the pressing convex portion 12a can press the vicinity of the upstream attachment portion D1 and the downstream attachment portion D2 from above, so that the flexibility by the upstream holding means 9 and the downstream holding means 10 is flexible. The holding of the sex tube D can be assisted. That is, in the state where the cover 12 is opened, the upper side in FIG. 4 of the upstream side attachment part D1 and the downstream side attachment part D2 is not restricted, so the cover 12 is closed and the upstream side attachment part D1 and By pressing the vicinity of the downstream attachment portion D2 from above, the movement in the radial direction can be regulated more reliably.

  On the other hand, the stator 6 is provided with a sensor 14 (detection means) that detects the rotational position of the rotor 7 and is electrically connected to the motor 13. It is configured to stop at a position. Therefore, since the rotor 6 is stopped at a predetermined position based on the detection of the sensor 14, the next time the flexible tube D is attached to the attachment recess R, a desired position (for example, as shown in FIG. The state in which the rollers 8 are positioned vertically in the figure) can be improved, and the mounting workability can be further improved.

Next, the mounting operation of the flexible tube D in the ironing blood pump will be described.
First, the flexible tube D is bent into a substantially U shape, and the upstream side is clamped by the upstream clamping unit 9 and the downstream side is clamped by the downstream clamping unit 10. Specifically, when attaching the upstream side, the upstream side clamping means 9 is swung against the urging force of the torsion spring S, and after passing through the upstream side attachment part D1, the upstream side clamping means 9 is inserted. Is pivoted to the original position (clamping position) and clamped, and when the downstream side is mounted, the downstream mounting portion D2 is inserted between the pair of roller members 10 and clamped.

  In this state, the flexible tube D is merely routed along the inner peripheral wall surface 6 a, is not held between the guide pins 11 a and 11 b, and is not compressed by the roller 8. In this state, when the cover 12 is closed and the motor 13 is driven to rotate the rotor 7, the flexible tube D is compressed by the roller 8 and held by the guide pins 11a and 11b by the rotational driving force. And the downstream attachment site D2 moves in the longitudinal direction with a load applied on the downstream side.

  That is, when the length of the flexible tube D routed by the rotational driving force of the rotor 7 (the dimension from the upstream attachment portion D1 to the downstream attachment portion D2) is longer than the setting, the downstream attachment portion D2 is If it moves in the direction of being discharged from the mounting recess R, and conversely short, the downstream mounting portion D2 moves in the direction of being pulled into the mounting recess R. Thereby, the flexible tube D can be attached to the attachment recessed part R almost automatically, and the attachment workability | operativity of the flexible tube D with respect to the attachment recessed part R can be improved.

  Further, the flexible tube D can be attached to the mounting recess 6 a of the stator 7 by simply rotating the rotor 7 and routing the flexible tube D along the inner peripheral wall surface 6 a of the mounting recess R. Therefore, mounting failure can be suppressed, and the guide pin 11a can be prevented from biting the flexible tube D, and the flexible tube D and the rotor 7 can be prevented from being damaged. In addition, by closing the cover 12, clamping to the upstream attachment portion D1 and the downstream attachment portion D2 is assisted.

  Thus, hemodialysis treatment can be started by attaching the flexible tube D to the attachment recess R and puncturing the patient with the arterial puncture needle a and the vein puncture needle b. At the time of treatment, since the upstream side clamping means 9 is restricted from moving in the longitudinal direction of the flexible tube D, the entire flexible tube D is moved in the longitudinal direction due to the rotational drive of the rotor 7. There is no. Further, after hemodialysis treatment (after blood is collected), the motor 13 is stopped to stop the rotational drive of the rotor 7. At this time, the rotor 7 stops at a desired position based on the detection of the sensor 14. Will be.

Next, a second embodiment of the present invention will be described.
As with the first embodiment, the ironing pump according to the present embodiment compresses a flexible tube that constitutes a part of a blood circuit for circulating blood extracorporeally while compressing the blood in the radial direction. As shown in FIGS. 6 and 7, the stator 6, a rotor 7 that can be driven to rotate in the stator 6, and a rotor 7 are formed in the rotor 7. The roller 8, a pair of upper and lower guide pins 11 a and 11 b, a cover 12, an upstream clamping unit 9, and a downstream clamping unit 15 are mainly configured. In addition, the same code | symbol is attached | subjected to the component similar to previous embodiment, and the detailed description is abbreviate | omitted.

  The lower clamping means 15 is for clamping the downstream attachment portion D2 in the flexible tube D, and is capable of swinging about the swing axis L4 and firmly tightening the downstream attachment portion D2. It consists of a member in which a groove 15a that can be sandwiched is formed. That is, the groove 15a is a groove having a width smaller than the outer diameter of the downstream attachment portion D2, and when the downstream attachment portion D2 is fitted, the groove 15a is fixed to the downstream clamping means 15 (in the longitudinal direction and the radial direction). The movement is regulated).

  When the flexible tube D is attached to the attachment recess R, if a load in the longitudinal direction is applied to the downstream attachment portion D2 sandwiched by the downstream sandwiching means 15, the downstream sandwiching means 15 It moves with rocking about the rocking axis L4. Thereby, the downstream clamping means 15 permits the movement in the longitudinal direction with respect to the downstream attachment portion D2, and attaches the flexible tube D to the attachment recess R almost automatically as in the first embodiment. The mounting workability of the flexible tube D to the mounting recess R can be improved.

Next, a third embodiment of the present invention will be described.
As with the first and second embodiments, the ironing pump according to the present embodiment compresses the flexible tube that constitutes a part of the blood circuit for circulating blood extracorporeally while squeezing in the radial direction. As shown in FIGS. 8 and 9, the stator 6, the rotor 7 that can be driven to rotate within the stator 6, and the rotor 7 The roller 8 is formed mainly by a pair of upper and lower guide pins 11 a and 11 b, a cover 12, an upstream clamping unit 9, and a downstream clamping unit 16. In addition, the same code | symbol is attached | subjected to the component similar to previous embodiment, and the detailed description is abbreviate | omitted.

  The lower clamping means 16 is for clamping the downstream mounting portion D2 in the flexible tube D, and the bottom surface portion 16b is slidable along the rail 16c formed on the bottom surface of the mounting recess R. And it consists of the member in which the groove | channel 16a which can clamp the downstream attachment part D2 firmly was formed. That is, like the second embodiment, the groove 16a is a groove having a width smaller than the outer diameter of the downstream attachment portion D2, and when the downstream attachment portion D2 is fitted, the groove 16a is opposed to the downstream clamping means 16. It is fixed (movement in the longitudinal direction and the radial direction is restricted).

  When the flexible tube D is attached to the attachment recess R, if a load in the longitudinal direction is applied to the downstream attachment portion D2 sandwiched by the downstream sandwiching means 16, the downstream sandwiching means 16 It moves with the sliding along the rail 16c. Thereby, the downstream clamping means 16 permits the movement in the longitudinal direction with respect to the downstream attachment portion D2, and, as in the first and second embodiments, the flexible tube D is attached almost automatically. It is possible to improve the attachment workability of the flexible tube D to the attachment recess R.

  According to the said 1st-3rd embodiment, compared with the conventional ironing type pump, it can attach to the mounting recessed part R easily and reliably irrespective of the length of the flexible tube D which should be attached. That is, if a dedicated flexible tube whose length is matched with the inner peripheral wall of a specific ironing pump is used, it is ideal that the biting by the guide pin 11a is suppressed, but the inner peripheral wall has various dimensions. There is a high need to reduce the cost by applying it to a certain ironing type pump, and in this case, it is necessary to provide a general-purpose flexible tube D having a large longitudinal dimension (length).

  When such a general-purpose flexible tube D is to be attached to the attachment recess R, in the conventional case, for example, after the upstream attachment portion D1 is held by the upstream holding means 9, the inner peripheral wall surface 6a of the attachment recess R is provided. It is necessary to determine the downstream side attachment site D2 to be routed along the downstream side and clamped by the downstream side clamping means (10, 15, 16), which makes the installation work troublesome. Further, in the case of the conventional one, if the dimension between the upstream attachment portion D1 and the downstream attachment portion D2 is made longer than the inner peripheral wall surface 6a at the time of handling, the flexible tube D is detached from the stator 6. Protruding or biting easily occurs. On the other hand, according to the present embodiment, the attachment work is easy even in a general-purpose flexible tube (having a long longitudinal dimension), and the protrusion and the biting from the stator 6 are suppressed and reliable. Installation can be performed.

  As mentioned above, although this embodiment was described, this invention is not limited to these, For example, the upstream attachment part D1 which clamps the upstream attachment part D1 of the flexible tube D can fix the said upstream attachment part D1. You may replace with the thing of another form. Moreover, you may replace the downstream clamping part which clamps the downstream attachment part D2 of the flexible tube D with the thing of the other form which can accept | permit the movement to the longitudinal direction of the said upstream attachment part D2. That is, it suffices to restrict the movement in the longitudinal direction by firmly holding the upstream attachment part D1 and allow the movement in the longitudinal direction by loosely holding the downstream attachment part D2.

  In the present embodiment, the rotational position of the motor 13 is detected by the sensor 14 and the rotor 7 is stopped at a predetermined position. However, the sensor 14 is not provided and the stop position of the rotor 7 is not constant. It can also be applied to. Furthermore, in this embodiment, the present invention is applied to a dialysis apparatus that performs hemodialysis treatment. However, any other treatment can be used as long as it has a peristaltic blood pump in a blood circuit that allows the patient's blood to be removed from the body. It can also be applied to things. In this embodiment, the present invention is applied to a blood pump that can flow blood in a blood circuit. You may apply to an infusion pump etc.).

  The upstream clamping means fixes the flexible tube and restricts the movement in the longitudinal direction, and the downstream clamping means clamps while allowing the flexible tube to move in the longitudinal direction by the rotational driving force of the rotor. If it is the attachment method of a pump and its flexible tube, it can apply also to the thing from which external appearance differs, or the thing to which the other function was added.

The schematic diagram which shows the dialysis apparatus with which the ironing type pump of this invention is applied. An enlarged schematic diagram showing a flexible tube of a blood circuit attached to the peristaltic pump The top view which shows the ironing type pump which concerns on the 1st Embodiment of this invention Front view showing the ironing pump Cross-sectional schematic diagram showing a rotor, a roller and a guide pin formed on the rotor in the ironing pump The top view which shows the ironing type pump which concerns on the 2nd Embodiment of this invention. Front view showing the ironing pump The top view which shows the ironing type pump which concerns on the 3rd Embodiment of this invention. Front view showing the ironing pump

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Blood circuit 1a Arterial side blood circuit 1b Venous side blood circuit 2 Dializer 3 Blood pump 4 Drip chamber 5 Dialyzer main body 6 Stator 7 Rotor 8 Roller 9 Upstream side clamping means 10, 15, 16 Downstream side clamping means 11a, 11b Guide pin 12 Cover 12a Pressing convex part 13 Motor 14 Sensor (detection means)
R Mounting recess D Flexible tube

Claims (5)

A stator having a mounting recess to which a flexible tube capable of flowing a fluid such as blood is mounted;
An upstream side clamping means for clamping the upstream side of the flexible tube and a downstream side clamping means for clamping the downstream side with the flexible tube attached to the attachment recess;
A rotor capable of being driven to rotate in the mounting recess;
For fluidizing the fluid in the flexible tube by compressing the flexible tube formed in the rotor and attached to the attachment recess in the longitudinal direction while compressing the flexible tube in the radial direction. Laura,
In the ironing type pump equipped with
The upstream side clamping means fixes the flexible tube and restricts the movement in the longitudinal direction, and the downstream side clamping means controls the movement of the flexible tube in the longitudinal direction by the rotational driving force of the rotor. An ironing type pump characterized by being pinched while allowing.   The rotor is provided with a guide pin that protrudes toward the inner peripheral wall surface of the mounting recess, and the clearance between the protruding end of the guide pin and the inner peripheral wall surface is such that the flexible tube to be attached is in the radial direction. 2. The ironing pump according to claim 1, wherein the pump is set to be insertable in an elastically deformed state. A cover that is openably and closably attached to the stator and covers the attachment recess in a closed state;
A pressing convex portion formed on the cover and capable of pressing the flexible tube clamped by the upstream clamping means and the downstream clamping means from above in a closed state;
The ironing pump according to claim 1 or 2, further comprising:   The detection means for detecting the rotational position of the rotor is provided, and the rotor is stopped at a predetermined position based on the detection by the detection means. Noshigaki type pump. A stator having a mounting recess to which a flexible tube capable of flowing a fluid such as blood is mounted;
A rotor capable of being driven to rotate in the mounting recess;
For fluidizing the fluid in the flexible tube by compressing the flexible tube formed in the rotor and attached to the attachment recess in the longitudinal direction while compressing the flexible tube in the radial direction. Laura,
In the method of mounting the flexible tube of the ironing pump comprising
With the rotor rotated, the flexible tube is routed along the inner peripheral wall surface of the mounting recess, and the downstream side is rotated by the rotor while the upstream side of the flexible tube is fixed. A method of attaching a flexible tube of a peristaltic pump, characterized by allowing movement in the longitudinal direction.

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