JP4812101B2 - Ironing type pump and method for removing flexible tube thereof - Google Patents

Description

  The present invention relates to a squeezing pump for causing blood to flow in the blood circuit by compressing the flexible tube constituting a part of the blood circuit for circulating the blood extracorporeally in the radial direction, and the same The present invention relates to a method for removing a flexible tube.

  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. A rotor that can be driven, a roller that is formed on the roller and compresses the flexible tube, and a flexible tube that is formed to protrude from the rotor toward the inner peripheral wall surface of the mounting recess. It is mainly composed of a guide pin held at a predetermined position.

  In order to remove the flexible tube from the squeezed blood pump, it has been conventionally necessary for an operator such as a medical worker to remove the flexible tube from the mounting recess while rotating the rotor little by little by hand. In other words, since the guide pin protrudes from the rotor toward the inner peripheral wall surface of the mounting recess, the guide pin interferes when the flexible tube is removed from the mounting recess. It was necessary to rotate and avoid interference with the guide pin. 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 above conventional ironing type pump, it is necessary to remove the flexible tube from the mounting recess while rotating the rotor little by little by hand. In addition, if the flexible tube is accidentally bitten by the guide pin during removal, the flexible tube or the guide pin may be damaged.

  The present invention has been made in view of such circumstances, and can improve the workability of removing the flexible tube from the mounting recess, and prevent breakage of the flexible tube and the guide pin during the removal work. An object of the present invention is to provide an ironing type pump that can be used and a method for removing 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. A clamping means for clamping the upstream side and the downstream side of the tube, a rotor that can be driven to rotate in the mounting recess, and a flexible tube that is formed in the rotor and attached to the mounting recess is compressed in the radial direction. However, by squeezing in the longitudinal direction with the rotation of the rotor, a roller for flowing a fluid in the flexible tube, and a protrusion protruding from the rotor toward the inner peripheral wall surface of the mounting recess, the mounting In the ironing pump having a guide pin for holding the flexible tube in the recess in a predetermined position, the clamping means clamps at least the upstream side of the flexible tube. One said the guide pin to the upper is permitted to rise operation, Rutotomoni is a removable flexible tube from the mounting recess by the upward motion, the clearance between the tip and the inner peripheral wall surface of the guide pin is allowed The flexible tube is set to be insertable in a state of being elastically deformed in the radial direction .

  According to a second aspect of the present invention, in the ironing pump according to the first aspect, the clamping means moves upward while pulling the clamped flexible tube in the longitudinal direction.

  According to a third aspect of the present invention, in the ironing type pump according to the first or second aspect, the clamping means includes an upstream portion clamping groove for clamping the upstream side of the flexible tube and a downstream portion clamping for clamping the downstream side. And a swing member that is swingable in the vertical direction with respect to the stator about the downstream sandwiching groove side as an axis.

  According to a fourth aspect of the present invention, in the ironing pump according to the third aspect, the swinging member is swingable in a direction of pulling the sandwiched flexible tube.

  According to a fifth aspect of the present invention, in the ironing pump according to any one of the first to fourth aspects, the clamping means fixes the upstream side of the flexible tube to move in the longitudinal direction. In addition to being regulated, the flexible tube is clamped while allowing movement in the longitudinal direction on the downstream side of the flexible tube.

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

According to a seventh 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 capable of being driven to rotate within the mounting recess, and the rotor. A roller for causing fluid to flow in the flexible tube by compressing the flexible tube attached to the mounting recess in the longitudinal direction while compressing the flexible tube in the radial direction, and the rotor In the method for removing the flexible tube of the ironing pump, the guide tube is provided so as to protrude from the inner peripheral wall surface of the mounting recess to hold the flexible tube in the mounting recess in a predetermined position. In a state where it is driven to rotate, it is raised above the guide pin while holding at least the upstream side of the flexible tube.

According to the first and seventh aspects of the present invention, the clamping means can be moved up to above the guide pin while holding at least the upstream side of the flexible tube, and is flexible from the mounting recess by the lifting operation. Since the tube can be removed, the flexible tube can be automatically removed from the mounting recess by rotating the rotor. Therefore, it is possible to improve the workability of removing the flexible tube from the mounting recess, and it is possible to prevent the flexible tube and the guide pin from being damaged during the removal work.
Furthermore, since the clearance between the protruding end of the guide pin and the inner peripheral wall surface is set so that it can be inserted in a state where the flexible tube is elastically deformed in the radial direction, the upstream side of the flexible tube is moved upward. At this time, the flexible tube can be prevented from being bitten by the guide pin. Further, if the rotor is driven to rotate after the flexible tube is routed in the mounting recess, the flexible tube can be automatically mounted in the mounting recess while avoiding biting.

  According to the invention of claim 2, since the clamping means moves upward while pulling the clamped flexible tube in its longitudinal direction, the flexible tube can be removed from the mounting recess more smoothly. it can.

  According to the invention of claim 3, since the clamping means has the swinging member that is swingable in the vertical direction with respect to the stator with the downstream portion sandwiching groove side as an axis, the upstream side of the sandwiched flexible tube is The position is higher than the downstream side, and the flexible tube can be removed from the mounting recess while effectively using the rotational operation of the rotor.

  According to the fourth aspect of the present invention, since the swing member can swing in the direction of pulling the sandwiched flexible tube, the swing member is sandwiched in the process of swinging upward with respect to the stator. The flexible tube can be pulled in its longitudinal direction. Therefore, the workability of removing the flexible tube from the mounting recess can be further improved.

  According to the invention of claim 5, the clamping means fixes the upstream side of the flexible tube to restrict the movement in the longitudinal direction, and clamps while allowing the movement in the longitudinal direction on the downstream side of the flexible tube. Therefore, when raising the upstream side of the flexible tube, it is possible to avoid that the downstream side moves in the longitudinal direction and an excessive tension is applied. Further, if the rotor is driven to rotate after the flexible tube is routed in the mounting recess, the flexible tube can be automatically mounted in the mounting recess while avoiding biting.

According to the sixth aspect of the present invention, 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. When attaching a flexible tube, it can be set to a desired position where attachment is easy, and attachment workability can be further improved.

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. It consists of a squeezing 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. Also, the dialysate inlet port 2c and the dialysate outlet port 2d are connected respectively extending dialysate introduction line Ln1 and the dialysate discharge line Ln2 from the dialysis device body 6.

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. Then, when the iron blood pump 3 is driven in a state where the patient has punctured the arterial puncture needle a and the venous side puncture needle b, the patient's blood reaches the dialyzer 2 through the arterial blood circuit 1a. After blood purification is performed by the dialyzer 2, the bubble is removed in the drip chamber 4 and returns to the patient's body through the venous blood circuit 1 b. 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. 15a and 15b, the cover 14, and the clamping member 9 and the rocking member 10 as clamping means are mainly comprised.

  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. A rotor 7 that can be driven to rotate about a rotation axis L1 by a motor (not shown) is disposed at substantially the center of the mounting recess R. A pair of rollers 8 and guide pins 15a and 15b 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, and the rotation of the rotor 7 is also performed. With the driving, the rotation direction (longitudinal direction) can be squeezed. 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.

  As shown in FIG. 8, the guide pins 15a and 15b are formed of pin-like members that are respectively projected from the upper end side and the lower end side of the rotor 7 toward the inner peripheral wall surface 6a. The sex tube D will be held. That is, when the rotor 7 is driven, the upper and lower guide pins 15a and 15b hold the flexible tube D in a proper position, and the upper guide pin 15a does not leave the mounting recess R.

  In this embodiment, as shown in the figure, the clearance t1 between the protruding end of the upper guide pin 15a and the inner peripheral wall surface 6a is between the protruding end of the lower guide pin 15b 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 15a 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.

  Since the lower guide pin 15b is a 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, a guide It is good also as a protrusion dimension substantially the same as the pin 15a. If a projecting member that can be bent with elasticity is used in place of the guide pins 15a and 15b, the flexible tube D can be attached to and detached from the mounting recess R without much consideration of the projecting dimension of the guide pin. Biting of the flexible tube D at the time can be prevented.

The swing member 10 holds the upstream portion holding groove 9a that holds the upstream side of the flexible tube D (this is referred to as an upstream side attachment portion D1) and the downstream side (this is referred to as a downstream side attachment portion D2). The holding member 9 formed with the downstream portion holding groove 9b is fixed, and pulls the flexible tube D held in the vertical direction (direction a1 in FIG. 6) around the swing axis La (in FIG. 5). a2 direction).

  That is, the fixed base 11 is fixed to the stator 6 by the bolt B, and the swinging member 10 swings around the swinging shaft La projecting from the fixed base 11 so that the holding member 9 is also moved up and down. It is configured to swing in the direction (a1 direction). Further, a spring 12 is interposed on the swing shaft La, and when the swing member 10 swings in the a2 direction against the urging force of the spring 12, the clamping member 9 also swings in the same direction. It is configured to

Upstream portion holding grooves 9a, the groove width are slightly smaller than the outer diameter of the upstream-side mounting portion D1, while being configured to be tightly held between the upstream-side mounting portion D1, the downstream portion holding grooves 9b , the groove width are larger downstream mounting portion D2 substantially the same or slightly is configured to be loosely held between the downstream side mounting portion D2. Accordingly, the upstream side of the flexible tube D can be fixed to restrict the movement in the longitudinal direction, and can be sandwiched while allowing the movement in the longitudinal direction on the downstream side.

  In addition, a protruding member 13 is disposed on the fixed base 11 toward the swing member 10. The protruding member 13 is biased toward the swing member 10 by an elastic member such as a spring (not shown), and when the swing member 10 swings in the a1 direction and reaches a predetermined position (state shown in FIG. 6). , And is configured to be fitted into a hole (not shown) formed in the swing member 10. Thereby, the rocking | swiveling member 10 is hold | maintained in a predetermined position, and the removal operation | work of the flexible tube D can be performed more easily.

  When the flexible tube D is removed from the mounting recess R, the clamping member 9 is in a state in which the upstream mounting site D1 and the downstream mounting site D2 are respectively clamped by the upstream clamping groove 9a and the downstream clamping groove 9b. By swinging in the a1 direction, at least the upstream attachment portion D1 is raised above the guide pin 15a (specifically, the upper guide pin for preventing the flexible tube from falling off the attachment recess R). It is configured to operate. Thus, if the rotor 7 is driven to rotate, the flexible tube D can be automatically removed from the mounting recess R, so that the workability of removing the flexible tube D can be improved and removed. It is possible to prevent the flexible tube D and the guide pin 15a from being damaged during work.

  On the other hand, if the clamping member 9 is also swung in the a2 direction while swinging in the a1 direction, the flexible tube D held in the process of swinging upward (a1) with respect to the stator 6 is moved in the longitudinal direction. Can be pulled. Therefore, the workability of removing the flexible tube D from the mounting recess R can be further improved.

  Further, as shown in FIG. 7, an inclined surface 10 a is formed at the contact portion of the swing member 10 with the projection member 13, and in the process of swinging the sandwiching member 9 in the a1 direction, the upstream portion sandwiching groove The holding member 9 and the swinging member 10 can be tilted so that the 9a and the downstream portion holding groove 9b are separated from the stator 6, and the upstream attachment portion D1 and the downstream attachment portion D2 can be pulled. Thereby, the pulling force with respect to the longitudinal direction of the flexible tube D can be improved while suppressing the swing angle of the swing member 10 in the a2 direction.

  The cover 14 is attached to the stator 6 so as to be openable and closable, and covers the mounting recess R in a closed state. The cover 14 can prevent foreign matter and the like from entering the mounting recess R when the rotor 7 is rotationally driven. is there. As shown in FIG. 4, the cover 14 has a flexible tube D (specifically, upstream side) sandwiched between the upstream portion sandwiching groove 9a and the downstream portion sandwiching groove 9b with the cover 14 closed. A pressing convex portion 14a is formed which can press the attachment portion D1 and the vicinity of the downstream attachment portion D2) from above. The swing axis of the cover 14 (that is, the axis that determines the opening / closing direction) may be at any position of the stator 6 as long as it does not interfere with the mounting of the flexible tube D to the mounting recess R.

However, the ironing blood pump 3 includes a motor (not shown) for rotationally driving the rotor 7, and a sensor (not shown) that detects the rotational position of the rotor 7 and is electrically connected to the motor. The rotor 7 is stopped at a predetermined position based on detection of the sensor. Accordingly, since the rotor 7 is stopped at a predetermined position based on the detection of the sensor, the next time the flexible tube D is attached to the attachment recess R, a desired position (for example, a roller as shown in FIG. 8 is a state in which it is positioned up and down in the figure), and the mounting workability can be further improved.

Next, the removal operation of the flexible tube D in the ironing blood pump will be described.
After the hemodialysis treatment (after blood is collected), the rotational drive of the rotor 7 is maintained (may be stopped once and then rotated again), and the swinging member 10 is moved in the a2 direction. While swinging in the direction in which the swing member 10 is separated from the stator 6, the swing member 10 is also swung in the a1 direction (upward). Thereby, the upstream attachment site | part D1 and the downstream attachment site | part D2 can be lifted upward, applying the tension | tensile_strength by pulling the flexible tube D to the longitudinal direction.

And if the upstream attachment site | part D1 raises above the guide pin 15a, the flexible tube D attached to the attachment recessed part R will remove | deviate sequentially from an upstream side with the rotational drive of the rotor 7. FIG. That is, according to this embodiment, the clamping member 9 is attached to the swing member 10 which is swingable in the vertical direction relative to the stator 6 to the downstream portion holding grooves 9 b side as an axis (swing axis La) Therefore, the upstream side of the sandwiched flexible tube D is positioned higher than the downstream side, and the flexible tube D can be removed from the mounting recess R while effectively using the rotational operation of the rotor 7. .

In addition, since the upstream side of the flexible tube D is fixed and the movement in the longitudinal direction is restricted and is held while allowing the movement in the longitudinal direction on the downstream side, the upstream side of the flexible tube D (upstream) When the side attachment part D1) is moved up, it is possible to avoid that the downstream side moves in the longitudinal direction and an excessive tension is applied. That is, the tension applied to the flexible tube D during removal is mainly exerted on the upstream side, and the removal action is performed smoothly. With this configuration, even when the flexible tube D is attached to the attachment recess R, if the rotor 7 is driven to rotate after the flexible tube D is routed in the attachment recess R, the biting is avoided. The flexible tube D can be automatically attached to the attachment recess R.

After the flexible tube D is removed from the mounting recess R as described above, the clamping type of the upstream side mounting portion D1 and the downstream side mounting portion D2 in the upstream portion holding groove 9a and the downstream portion holding groove 9b is released. The flexible tube D can be removed from the blood pump 3. Incidentally, after the removal of the flexible tube D is completed, so that the rotor 7 at a desired position based on the detection of the sensor is stopped.

  According to the present embodiment, the clearance t1 between the protruding end of the guide pin 15a and the inner peripheral wall surface 6a is set so that it can be inserted in a state where the flexible tube D is elastically deformed in the radial direction. When raising the upstream side of the flexible tube D, the flexible tube D can be prevented from being bitten by the guide pin 15a. If the rotor 7 is rotationally driven after the flexible tube D is routed in the mounting recess R, the flexible tube D can be automatically mounted in the mounting recess R while avoiding biting. Further, a sensor (detecting means) for detecting the rotational position of the rotor 7 is provided, and the rotor 7 is stopped at a predetermined position based on the detection by the detecting means. When the flexible tube D is attached to R, it can be set to a desired position where attachment is easy, and attachment workability can be further improved.

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 FIG. 9 to FIG. 12, the stator 6, a rotor 7 that can be driven to rotate in the stator 6, and a rotor 7 are formed. The roller 8, a pair of upper and lower guide pins 15 a and 15 b, a cover 14, and a swing frame 16 as a clamping means. In addition, the same code | symbol is attached | subjected to the component similar to previous embodiment, and the detailed description is abbreviate | omitted.

As shown in FIG. 9, the swing frame 16 can swing on a pair of left and right swing shafts Lb while surrounding the side surfaces (front, right side, and left side) of the stator 6 , and a flexible tube. An upstream portion sandwiching groove 16a and a downstream portion sandwiching groove 16b (see FIG. 10) that can sandwich the upstream attachment portion D1 and the downstream attachment portion D2 of D are formed. Each swing shaft Lb is provided with a torsion spring 17 and urges the swing frame 16 to swing upward. Further, a pin-like protruding member P that protrudes from a predetermined portion of the swing frame 16 and can be engaged through an engagement hole 6 b formed in the stator 6 is formed.

However, in order to remove the flexible tube D attached to the attachment recess R, the swing frame 16 is slid rightward in FIG. 9 and the projection member P is separated from the engagement hole 6b to release the engagement. The oscillating frame 16 oscillates about the oscillating axis Lb by the urging force of the torsion spring 17 (FIGS. 11 and 12). Thereby, the upstream side (upstream side attachment site D1) and the downstream side (downstream side installation site D2) of the flexible tube D can be moved upward from the guide pin 15a.

  Thus, if the rotor 7 is rotationally driven during the detaching operation, the flexible tube D in the mounting recess R is automatically and sequentially turned from the upstream side to the downstream side by the rotational action. As a result, the workability of removing the flexible tube D from the mounting recess R can be improved, and the flexible tube D and the guide pin 15a can be prevented from being damaged during the removal work.

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. 13 and 14, the stator 6, a rotor 7 that can be driven to rotate within the stator 6, and the rotor 7, which are applied to a iron-type blood pump that causes blood to flow in the blood circuit. And a pair of upper and lower guide pins 15a and 15b, a cover 14, and a swing frame 19 as a clamping means. In addition, the same code | symbol is attached | subjected to the component similar to previous embodiment, and the detailed description is abbreviate | omitted. Further, the rotor 7, the guide pins 15a and 15b, the cover 14 and the like are not shown because they are the same as those in the previous embodiment.

As shown in FIG. 13, the swing frame 19 is swingable about a pair of swing shafts Lc formed on the base 18, and the upstream mounting portion D1 and the downstream side of the flexible tube D. An upstream portion holding groove 19a and a downstream portion holding groove 19b capable of holding the attachment portion D2 are formed. A torsion spring 21 is interposed in each swing shaft Lc, and biases the swing frame 19 in the direction of swinging upward (in the direction of the arrow in FIG. 14 ).

  Further, a pin-like protruding member 22 protrudes from a predetermined portion of the swing frame 19, and the swing frame 19 is engaged with the protrusion member 22 by fitting into the notch 20 a of the stopper member 20. It is in a stopped state. The stopper member 20 is swingable about the swing axis Ld. As shown in FIG. 14, the stopper member 20 is moved from the position where the notch 20a is fitted to the protruding member 22 (fitted state shown by the solid line in FIG. 14). It can swing to the retracted position (the retracted state of the two-dot chain line in the figure).

However, in order to remove the flexible tube D attached to the attachment recess R, when the stopper member 20 is swung to the retracted position from the fitted state, the fitting between the notch 20a and the protruding member 22 is released. Therefore, the swing frame 19 swings upward (in the direction of the arrow in FIG. 14) about the swing axis Lc by the biasing force of the torsion spring 21. As a result, the upstream side (upstream side attachment site D1) of the flexible tube D and the downstream side (downstream side installation site D2) move upward from the guide pin 15a.

  Thus, as in the first and second embodiments, if the rotor 7 is rotationally driven, the flexible tube D in the mounting recess R is automatically and sequentially removed from the upstream side to the downstream side by the rotational action. Thus, it is possible to improve the workability of removing the flexible tube D from the mounting recess R, and to prevent the flexible tube D and the guide pin 15a from being damaged during the removal work.

  Although the present embodiment has been described above, the present invention is not limited to these embodiments. For example, in a clamping unit that clamps the flexible tube D, the upstream mounting site D1 and the downstream mounting site D2 are clamped. The part may be formed separately, and at the time of removing the flexible tube D, at least the upstream side may be configured to move upward from the guide pin. Further, in this embodiment (particularly the first embodiment), when the upstream flexible tube is moved upward from the guide pin, the clamped flexible tube D is pulled, but at least the mounting recess If the inner flexible tube does not loosen, the pulling operation may not be performed.

  Further, in the present embodiment, the clamping means is configured to fix the upstream side of the flexible tube D to restrict the movement in the longitudinal direction and to clamp while allowing the movement in the longitudinal direction on the downstream side. However, it is also possible to restrict the movement of the flexible tube in the longitudinal direction by firmly holding both the upstream side and the downstream side. In this embodiment, the rotational position of the motor is detected by a sensor and the rotor 7 is stopped at a predetermined position. However, such a sensor is not provided, and the stop position of the rotor 7 is not constant. Can also be applied. Furthermore, in the present embodiment, the present invention is applied to a dialysis apparatus that performs hemodialysis treatment. However, as long as it has a peristaltic pump in a blood circuit for allowing the patient's blood to be removed from the body, other treatments can be used. It can also be applied to. Furthermore, in this embodiment, the present invention is applied to a blood pump that can flow blood in a blood circuit, but other squeeze type pumps (for example, a replacement fluid pump that can flow a replacement fluid or a fixed amount of medicine or the like is injected into a patient. It may be applied to an infusion pump or the like.

Is permitted to rise operation until above the guide pin while nipping the upstream side of at least the flexible tube, is a removable flexible tube from the mounting recess by the upward motion Rutotomoni, tip and the inner peripheral wall surface of the guide pin The clearance between the outer tube and the flexible tube is set so that it can be inserted in a state where the flexible tube is elastically deformed in the radial direction, and if it is a method for removing the flexible tube, the clearance shape is different or other The present invention can also be applied to those with functions 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 same type pump It is a top view which shows the same ironing type pump, Comprising: The schematic diagram which shows the rocking | fluctuation operation | movement to the a2 direction of a clamping means It is a front view which shows the same ironing type pump, and is a schematic diagram which shows rocking | fluctuation operation | movement to the a1 direction of a clamping means VII arrow view in FIG. 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 same type pump It is a front view which shows the same ironing type pump, and is a schematic diagram which shows the state which rock | fluctuated the cover and the clamping means It is a right view which shows the same ironing type pump, and is a schematic diagram which shows the state which rock | fluctuated the cover and the clamping means The top view which shows the ironing type pump which concerns on the 3rd Embodiment of this invention. Side 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 Ironing type blood pump 4 Drip chamber 5 Dialyzer main body 6 Stator 7 Rotor 8 Roller 9 Clamping member (clamping means)
9a Upstream part clamping groove 9b Downstream part clamping groove 10 Oscillating member (clamping means)
DESCRIPTION OF SYMBOLS 11 Fixed base 12 Spring 13 Projection member 14 Cover 15a, 15b Guide pin 16 Oscillation frame (clamping means)
16a Upstream portion clamping groove 16b Downstream portion clamping groove 17 Torsion spring 18 Base 19 Oscillating frame (clamping means)
19a Upstream portion clamping groove 19b Downstream portion clamping groove 20 Stopper member 21 Torsion spring 22 Projection member R Mounting recess D Flexible tube

Claims (7)

A stator having a mounting recess to which a flexible tube capable of flowing a fluid such as blood is mounted;
Clamping means for clamping the upstream side and the downstream side of the flexible tube in a state where the flexible tube is attached to the mounting 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,
A guide pin formed to protrude from the rotor toward the inner peripheral wall surface of the mounting recess, and holding the flexible tube in the mounting recess in a predetermined position;
In the ironing type pump equipped with
The clamping means is permitted to rise operation until above said guide pin while nipping at least upstream of the flexible tube, is a removable flexible tube from the mounting recess by the upward movement Rutotomoni, A clearance pump between a protruding end of the guide pin and an inner peripheral wall surface is set so as to be able to be inserted in a state where the flexible tube is elastically deformed in a radial direction .   2. The ironing pump according to claim 1, wherein the clamping means moves up while pulling the clamped flexible tube in the longitudinal direction.   The clamping means includes an upstream portion clamping groove that clamps the upstream side of the flexible tube and a downstream portion clamping groove that clamps the downstream side, and the vertical direction with respect to the stator about the downstream portion clamping groove side as an axis. 3. The ironing pump according to claim 1, further comprising a swinging member that is swingable.   4. The ironing pump according to claim 3, wherein the swing member is swingable in a direction of pulling the sandwiched flexible tube.   The clamping means fixes the upstream side of the flexible tube to restrict the movement in the longitudinal direction, and clamps the flexible tube while allowing the movement in the longitudinal direction on the downstream side of the flexible tube. The ironing type pump according to any one of claims 1 to 4. As well as comprising a detecting means for detecting a rotational position of the rotor, according to any one of claims 1 to 5, characterized in that stopping at a predetermined position the rotor on the basis of the detection of 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,
A guide pin formed to protrude from the rotor toward the inner peripheral wall surface of the mounting recess, and holding the flexible tube in the mounting recess in a predetermined position;
In the method of removing the flexible tube of the ironing pump comprising
A method of removing a flexible tube of an ironing pump, wherein the rotor is driven to rotate and is raised above the guide pin while sandwiching at least the upstream side of the flexible tube.

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