JP5383586B2 - Tube pump - Google Patents

Description

  The present invention relates to a tube pump used for supplying a medical solution in a supply pack into the body, for example.

  The tube pump has a function of transferring the liquid in the tube by deforming the flexible tube so that it is handled in order from the upstream side to the downstream side by a driving unit such as a roller driven by a motor. For example, in the treatment of pain, it is used to inject a drug solution in a supply pack connected to the upstream side into a human body.

  The tube pump needs to stop operating when the chemical in the supply pack is finished and when a blockage occurs on the downstream side. For this reason, in FIG. 2 of Patent Document 1, an end sensor that detects the end of the chemical solution by a change in the outer shape of the tube is provided on the upstream side of the driving unit, and an occlusion sensor that detects a blockage by the change in the outer shape of the tube on the downstream side A tube pump provided with the above is disclosed.

  Further, FIG. 1 of Patent Document 1 discloses a tube pump in which the upstream sensor of the drive unit is eliminated and only the sensor provided on the downstream side detects the end of the chemical liquid and the occurrence of the blockage. Yes.

JP 2008-208808 A

  However, since the tube pump disclosed in FIGS. 1 and 2 of Patent Document 1 only detects changes in the outer shape of the tube, it takes time to detect when a gas such as air is mixed in the tube. was there. Also, medical pumps that inject chemicals into the body may stop operating as quickly as possible when bubbles are mixed in the tube or when chemicals in the supply pack are finished and air is sent in. However, it was difficult to cope with the technique of Patent Document 1.

  The tube pump in FIG. 1 of Patent Document 1 detects the end of the chemical solution by a combination of a single sensor and a drive signal, but in reality, the change of the signal and the end of the liquid in the supply bag are detected. There is a problem that the end of the liquid cannot be accurately detected.

  The present invention has been made in view of the above-described problems of the prior art, and when bubbles are mixed in the tube, the operation can be stopped immediately, and the end of the chemical solution in the supply pack, An object of the present invention is to provide a tube pump capable of accurately detecting the occurrence of a blockage on the downstream side and controlling the operation.

  In order to achieve the above object, the tube pump according to the present invention is arranged upstream of the drive unit in a configuration in which the liquid in the tube is transferred by deforming the flexible tube so as to be handled by the drive unit. An end sensor for detecting the reduction of the diameter of the tube, a closure sensor for detecting an increase in the diameter of the tube, and an upstream sensor or a downstream side of the drive part. The bubble diameter exceeds the second threshold when the bubble sensor that detects the bubbles in the tube and the drive unit is actuated by a start instruction and the end sensor detects that the tube diameter is below the first threshold. And a controller that stops the drive unit when the blockage sensor detects this and when the bubble sensor detects bubbles in the tube.

The end sensor, the blockage sensor, and the bubble sensor are provided in a tube holding block that is disposed at a position where the tube is led out from the drive unit . The tube holding block is integrally formed with first, second, and third protrusions that are arranged in order so as to form first and second troughs through which the upstream and downstream tubes of the drive unit pass. Configured. In this case, the end sensor, the first projecting portion, occlusion sensor is arranged on the third protruding portion, at least part of the bubble sensor, Ru is disposed in the second protruding portion.

  As the end sensor and the blockage sensor, a load sensor that includes a contact portion that contacts the tube and detects the deformation of the tube can be used. In this case, an opening that exposes the contact portion is formed on the side surface facing the first and second troughs of the first and third projecting portions of the tube pressing block, and the end sensor and the blockage sensor are connected to the tube. It is desirable that the position of the contact portion with respect to the sensor frame is supported so as to be independently adjustable with respect to the sensor frame fixed to the tube holding block so that the position of the contact portion can be adjusted in the radial direction of the tube. At least a part of the bubble sensor is supported via a subframe with respect to the sensor frame.

  In addition, as a bubble sensor, what is comprised from two components of a transmission part and a reception part, or what integrated the transmission part and the reception part can be used. In the case of two parts, one of them may be supported by the subframe, and the other may be arranged in the contact portion of either the end sensor or the closing sensor.

  It is desirable that at least a part of the bubble sensor supported by the subframe is provided with a protrusion on the periphery so as not to make surface contact with the subframe.

  In addition, it is desirable that the sub-frame is formed with a wedge portion that presses at least a part of the bubble sensor toward the detection target tube side when assembled to the second protrusion.

  Furthermore, it is desirable to provide a sensor for detecting that the tube is set in the drive unit, and for the control unit to operate the drive unit on condition that the tube is set by the sensor. In this case, the sensor that detects that the tube is set in the drive unit can also serve as an occlusion sensor.

  According to the present invention, by using the end sensor and the blockage sensor, it is possible to reliably detect the end of the chemical solution and the occurrence of the blockage on the downstream side, and by using the bubble sensor, bubbles are mixed into the tube. In such a case, it can be detected, and the operation of the drive unit can be appropriately controlled.

  Moreover, a space can be used effectively by arrange | positioning each sensor in the projection part of the tube pressing block arrange | positioned in the position which leads a tube outside.

  Furthermore, by making it possible to adjust the positions of the end sensor and the blockage sensor that are load sensors, it is possible to reliably detect even when tubes having different tube diameters or tube hardnesses are used.

  When the bubble sensor is composed of two parts, a transmitter and a receiver, one is supported by the subframe, and the other is disposed in the contact portion of either the end sensor or the blockage sensor, whereby the bubble sensor Therefore, it is not necessary to provide a new space, and the space can be used effectively.

  In addition, when a protrusion is provided around the bubble sensor, it avoids surface contact with the subframe, reduces the propagation of vibration from the transmitter to the receiver through the sensor frame, and improves the accuracy of bubble detection. Can be increased.

  Furthermore, when the wedge part is formed in the subframe, when assembling at least a part of the bubble sensor to the second protrusion of the tube holding block, the sensor is pressed to the tube side to be detected to accurately position the sensor. In addition, it is possible to suppress the rattling of the sensor by eliminating the clearance.

  In addition, if a sensor is provided to detect that the tube has been set in the drive unit, and the control unit operates the drive unit on condition that the tube has been set by the sensor, the tube is set. It is possible to prevent the drive unit from operating the twill mat in a state where it is not. Furthermore, if the sensor that detects that a tube has been set in the drive unit is also used as a blockage sensor, the number of sensors can be reduced and costs can be reduced compared to the case where a dedicated sensor is provided for tube set detection. Can do.

It is a perspective view which shows the external appearance of the tube pump which concerns on embodiment of this invention. It is a top view which shows the tube pump of FIG. It is a rear view which shows the tube pump of FIG. It is a front view which shows the tube pump of FIG. It is a top view which shows the tube cassette assembled | attached to the tube pump of FIG. It is sectional drawing which shows the inside of the sensor block provided in the tube pump of FIG. The assembly | attachment relationship of the bubble sensor arrange | positioned in the sensor block of FIG. 6 and a sub-frame is shown, (A) is a side view, (B) is a front view. It is a perspective view which fractures | ruptures and shows a part of sensor block of FIG. It is a disassembled perspective view of the sensor block of FIG. It is a bottom view of the sensor block of FIG. It is a disassembled perspective view which shows the assembly structure of the drive part and sensor block of the tube pump of FIG. It is a perspective view which shows the state which removed the stopper for fixing the tube cassette of the tube pump of FIG. It is a block diagram which shows the outline | summary of the control system of the tube pump of FIG. It is a flowchart which shows the outline | summary of an action | operation of the tube pump of FIG.

  Embodiments of a tube pump according to the present invention will be described below with reference to the drawings. Initially, the whole structure of the tube pump 100 is demonstrated based on FIGS. 1 to 4 show an appearance of a tube pump 100 according to an embodiment, FIG. 1 is a perspective view, FIG. 2 is a plan view, FIG. 3 is a rear view, and FIG. 4 is a front view.

  The tube pump 100 is formed in a substantially rectangular parallelepiped shape by combining the upper casing 10 and the lower casing 20, and a battery, a control circuit, a motor, and the like are housed in an interior surrounded by these casings.

  As shown in FIGS. 1 and 2, a plurality of operation buttons 11 including a power button are disposed on the upper casing 10, and a liquid crystal display (LCD) 12 as a display panel is attached to the center. ing.

  Moreover, the attachment part A which attaches the tube cassette 200 shown in FIG. 5 is formed in the right side of the upper surface of the upper casing 10. In the mounting portion A, a rotary shaft 13 of a built-in motor is led out at the center position, and is arranged so as to be vertically slidable around the rotary shaft 13 and is a circular spring plate urged upward by a built-in spring. 14. A tube holding block (hereinafter referred to as a sensor block) 30 in which a sensor to be described later is incorporated, and an interlock function attached in the vicinity of the sensor block 30 to assistly fix the tube cassette 200 to the mounting portion A. A stopper 40 is attached.

  The sensor block 30 includes first, second, and third protrusions 33 that are arranged in order so as to form first and second valley portions 31 and 32 through which tubes of the tube cassette 200 attached to the attachment portion A are passed. , 34 and 35 are formed integrally. The sensor block 30 is formed of resin.

  Further, an eject button 15 that is operated when removing the tube cassette 200 attached to the drive unit A and a lock lever 16 that locks the operation of the eject button 15 are attached to the back surface of the upper casing 10. Yes.

  As shown in FIG. 5, the tube cassette 200 forms a cylindrical wall 212 along the outer periphery of the disk-shaped bottom plate 211, and a flexible tube 220 along the inner periphery of the cylindrical wall 212. The three rollers 230 are arranged so as to crush the tube 220, and a shaft hole 240 through which the rotary shaft 13 of the motor is inserted from the back of the mounting portion A is formed in the center of these rollers 230. ing.

  When the tube cassette 200 is attached to the tube pump 100, the hook-shaped protrusion formed on the bottom surface of the tube cassette 200 is aligned with the groove formed on the attachment portion A, and the spring plate 14 is pressed by the bottom plate 211 while not shown. Press down until the hook-shaped protrusion is locked by the locking mechanism. Thereby, the rotating shaft 13 contacts the peripheral surface of each roller, and one of the tubes 220, in this example, the upstream side (in side) is inserted into the first valley 31 of the sensor block 30. On the other hand, in this example, the downstream side (out side) is inserted into the second valley portion 32.

  When the tube cassette 200 is attached to the tube pump 100 and the motor is rotated to rotate the rotating shaft 13 in the clockwise direction in FIG. 2, the three rollers 230 engaged therewith rotate counterclockwise and rotate clockwise. Revolve. Thereby, the tube 220 is deformed in order so as to be handled, and the liquid in the tube 220 can be transferred. Note that the motor, the rotating shaft 13, and the roller 230 constitute a drive unit that handles the tube 220. The sensor block 30 is arranged at a position where the tube 220 is led out from the drive unit.

  When removing the tube cassette 200 from the tube pump 100, the interlock by the stopper 40 is released, then the lock lever 16 is slid to release the lock, and the eject button 15 is pushed. Thereby, the lock mechanism is released, the spring plate 14 is raised by the action of a spring (not shown), and the tube cassette 200 can be removed from the attachment portion A.

  Next, the configuration of the sensor block 30 will be described in detail with reference to FIGS. 6 is a cross-sectional view showing the inside of the sensor block 30 provided in the tube pump 100 of FIG. 1, FIG. 7 shows a combination of a subframe and a receiver, (A) is a side view, and (B) is a front view. 8 is a perspective view showing a part of the sensor block 30 in a cutaway view, FIG. 9 is an exploded perspective view of the sensor block 30, and FIG. 10 is a bottom view of the sensor block 30.

  The tube pump 100 according to the present embodiment includes an end sensor 250 that detects a reduction in the diameter of the tube 220, a block sensor 260 that detects an increase in the diameter of the tube, and a transmission unit that forms a bubble sensor that detects bubbles in the tube. 270 and a receiver 271 are provided in the sensor block 30.

  The end sensor 250 has a first protrusion so as to detect a change in the diameter of the tube 200 on the upstream side of the drive unit inserted into the first valley 31 of the sensor block 30 when the tube cassette 200 is set. Arranged in the portion 33. The occlusion sensor 260 has a third protrusion so as to detect a change in the diameter of the tube 200 on the downstream side of the drive unit inserted in the second valley portion 32 of the sensor block 30 when the tube cassette 200 is set. Arranged in the portion 35. Thus, space can be used effectively by disposing each sensor in the protruding portion of the sensor block 30 disposed at a position where the tube 220 is led out to the outside. The outer surfaces of the first and third protrusions 33 and 35 are closed by lids 36 and 37, respectively.

  In addition, the bubble sensor is configured such that when the tube cassette 200 is set, the transmission unit 270 detects the bubbles in the tube 220 on either the upstream side or the downstream side of the drive unit, in this example, on the downstream side. 3, the receiving portion 271 is disposed on the second projecting portion 34, and is disposed so as to sandwich the downstream tube 220 inserted in the second valley portion 32.

  The bubble sensor detects bubbles in the tube 220 by receiving the sound wave emitted from the transmission unit 270 by the reception unit 271. Since the transmittance of sound waves differs between liquid and bubbles, the presence or absence of bubbles is detected using the difference. Specifically, the intensity of the sound wave received by the receiving unit 271 is strong when the inside of the tube is filled with the solution, and becomes weak when air bubbles enter the tube. Therefore, it can be determined that bubbles are included when the intensity of the sound wave becomes smaller than a predetermined threshold.

  The receiving portion 271 of the bubble sensor receives the receiving surface from the opening 34a formed on the second valley portion 32 side of the second protruding portion 34 by the subframe 51 attached to the sensor frame 50 fixed to the sensor block 30. It is supported by exposing a part of. As shown in FIGS. 7A and 7B, the subframe 51 includes a U-shaped first holding part 51a and a second holding part 51b that are opened upward in the drawing, and a receiving part 271. Is supported from below.

  Note that if the contact area between the receiving unit 271 of the bubble sensor and the sub frame 51 as the support member is large, the sound wave generated from the transmitting unit 270 wraps around the sensor frame 50 and the sub frame 51, and this becomes a noise component. Reduce the accuracy of bubble detection. For this reason, the receiving portion 271 is formed with a protrusion 271a around the first holding portion 51a of the subframe 51 so as not to come into contact with the surface. Thereby, the receiving unit 271 can avoid the surface contact with the subframe 51, the propagation of vibrations from the transmitting unit 270 to the receiving unit 271 via the sensor frame 50 can be reduced, and the accuracy of bubble detection can be increased.

  In addition, the second holding portion 51b of the subframe 51 has an opening 34a formed in the second protrusion 34 of the sensor block 30 by pushing the back surface of the receiving portion 271 when assembled to the sensor block 30 (see FIG. 6). A wedge surface 51c is formed so that the tip of the receiving portion 271 enters. As a result, when the receiver 271 is assembled to the second protrusion 34 of the sensor block 30, it is pressed toward the tube 220 to be detected, the position of the receiver 271 is accurately determined, and the clearance is eliminated to receive. Shaking of the portion 271 can be suppressed.

  In addition, as a bubble sensor, you may use what consists of two parts of the transmission part 270 and the receiving part 271 as mentioned above, and you may use what integrated the transmission part and the receiving part. . In the case where an integrated bubble sensor is used, it is desirable to dispose it in the second protrusion 34 of the sensor block 30. In the case of being composed of two parts as in the embodiment, the arrangement of the receiving unit and the transmitting unit may be opposite to the above.

  On the other hand, the end sensor 250 includes a plate-shaped load sensor 251 and a resin contact portion 252 that is attached to the distal end of the load sensor 251 and contacts the tube 220. It is inserted and fixed to a slide base 52 fixed to the sensor frame 50. The load sensor 251 is a strain gauge formed by printing a balanced bridge type resistor on a ceramic substrate. When the contact portion 252 is displaced and deformed, the deformation can be taken out as a change in electric resistance. In addition, the strain gauge can also employ a configuration in which a gauge pattern is used for the ceramic plate material.

  The first protrusion 33 of the sensor block 30 has an opening 33a that opens to the first trough 31 side, and the contact portion 252 is exposed to the first trough 31 from the opening 33a. Thus, the tube 220 is inserted into the first valley portion 31. When the supply of the chemical solution in the supply pack connected to the upstream side is finished during the operation of the tube pump 100 and the solution in the tube 220 is exhausted, the pressure is reduced (vacuum), the diameter of the tube 220 is reduced, and the end sensor 250 is reached. Output changes in the negative direction. When this change falls below a predetermined threshold, it is detected as an end.

  As with the end sensor 250, the block sensor 260 includes a plate-shaped load sensor 261 and a resin contact portion 262 that is attached to the tip of the load sensor 261 and contacts the tube 220. The base end of 261 is inserted into a slide base 53 fixed to the sensor frame 50 and fixed. When the contact portion 262 is displaced and deformed, the load sensor 261 can take out this deformation as a change in electric resistance.

  The third protrusion 35 of the sensor block 30 has an opening 35a that opens toward the second valley 32, and the contact portion 262 is exposed to the second valley 32 from the opening 35a. Due to this, the tube 220 is inserted into the second valley portion 32 and abuts on the tube 220. If a blockage occurs on the downstream side during the operation of the tube pump 100, the pressure is increased, the diameter of the tube 220 is increased, and the output of the blockage sensor 260 changes in the positive direction. When this change exceeds a predetermined threshold, it is detected that a blockage has occurred.

  The slide bases 52 and 53 are fixed to the sensor frame 50 by screws 52a and 53a, respectively, and can be adjusted with respect to the sensor frame 50 by loosening the screws 52a and 53a. The position of 262 can be independently adjusted in the radial direction of the tube 220. The change in the diameter of the tube 220 is, for example, about 30 microns, and the load is about 100 grams. Therefore, in order to accurately detect the change in the diameter, the positioning of the sensor is important. In addition, since sufficient adjustment cannot be performed only by adjusting the positions of the two upstream and downstream sensors at the same time, the two sensors can be adjusted independently as described above. Thereby, the change of the diameter of the tube 220 can be detected reliably.

  At the time of assembling the sensor block 30, as shown in FIG. 9, the subframe 51 is inserted and fixed in a state where the receiving unit 271 is temporarily arranged on the second protrusion 34. By fixing the sensor frame 50 to the sensor block 30 from this state, the subframe 51 is also fixed together.

  Next, the end sensor 250 and the closing sensor 260 are attached to the slide guides 52 and 53, and inserted into the first and third protrusions 33 and 35 so that the contact portions 252 and 262 are exposed from the openings 33a and 35a. Then, the slide bases 52 and 53 are fixed to the sensor frame 50 with screws 52a and 53a. At this time, adjustment is made so that the positions of the contact portions 252 and 262 become predetermined positions.

  Subsequently, the lids 36 and 37 are bonded to the first and third protrusions 33 and 35 with an adhesive, respectively, and if necessary, a waterproof sealant is filled to complete the assembly of the sensor block 30. .

  Next, assembly of the sensor block 30 in the tube pump 100 according to the embodiment will be described with reference to FIGS. 11 and 12. FIG. 11 is an exploded perspective view showing an assembly structure of the mounting portion A of the tube pump 100 and the sensor block 30, and FIG. 12 is a perspective view showing a state in which the stopper 40 of the tube pump 100 is removed.

  The sensor block 30 assembled as described above is attached to the upper casing 10 from the inside (back side). That is, as shown in FIG. 11, the base 60, the waterproof packing 61, and the motor frame 62 of the spring plate 14 are fixed to the mounting portion A of the upper casing 10 from the back side with screws. Then, the sensor block 30 is inserted through mounting holes 61a and 62a formed in the waterproof packing 61 and the motor frame 62, and screwed.

  Next, the configuration of the control system of the tube pump 100 of the embodiment will be described based on FIG. FIG. 13 is a block diagram showing an outline of a control system of the tube pump 100. In this example, only a part necessary for the description of the embodiment is taken out and described in a simplified manner, and the description of the flow rate control and timer control necessary as a function of the tube pump 100 is omitted.

  The control circuit mainly includes a control device 300 that controls the entire tube pump 100, an EEPROM 301 that stores a program for operating the control device 300 and various data, and an AC adapter that supplies power from an external power source. 302, a battery 303, a button battery 305 for driving the calendar IC 304, a motor driver 307 for driving and controlling the motor 306, a main switch 11a that is operated when the power switch is turned on to turn on / off the device, an LCD 12, an end sensor 250, a blockage A sensor 260, a transmission unit 270 and a reception unit 271 that constitute a bubble sensor, an alarm device 308, and the like are connected.

  When the end sensor 250 detects that the upstream tube diameter D has fallen below the first threshold Th1 during operation, the control device 300 operates the attachment portion A (motor 306) in response to the start instruction. It has a function of stopping the motor 306 when the blockage sensor 260 detects that the tube diameter D exceeds the second threshold Th2 and when the bubble sensor 270/271 detects bubbles in the tube. The control device 300 drives the alarm device 308 at the same time when the motor is stopped as described above, and performs alarm output (sound output and LED blinking).

  Next, operation | movement of the tube pump 100 of embodiment comprised as mentioned above is demonstrated based on FIG. FIG. 14 is a flowchart showing an outline of the operation of the tube pump 100.

  This process starts when the main switch 11a is turned on with the tube cassette 200 mounted. The attachment detection of the tube cassette 200 is performed using the blockage sensor 260 without using a dedicated sensor. That is, when the tube cassette 200 is attached to the attachment portion A and the tube is passed through the first and second troughs, a load change occurs in the blockage sensor 260 without the presence of the cassette. Is detected. First, in step S <b> 1, the control device 300 starts the rotation of the motor 306. Subsequently, in steps S2 to S5, the control device 300 checks the output of each sensor.

  In step S <b> 2, the control device 300 determines whether or not the tube diameter D is less than the first threshold Th <b> 1 based on the output of the end sensor 250. When the tube diameter D is less than the first threshold value Th1, the control device 300 determines that the liquid in the chemical solution bag has ended, stops the rotation of the motor 306 in step S6, and in step S7. After alarm output, the process is terminated.

  On the other hand, if the tube diameter D is not less than the first threshold value Th1, the control device 300 determines whether or not the tube diameter D exceeds the second threshold value Th2 in step S3 based on the output of the blockage sensor 260. judge. When the tube diameter D exceeds the second threshold Th2, the control device 300 determines that a blockage has occurred on the downstream side of the tube 220, stops the rotation of the motor 306 in step S6, and performs step S7. After the alarm is output at, the process is terminated.

  On the other hand, if the tube diameter D does not exceed the second threshold value Th2, the control device 300 determines in step S4 whether there are bubbles in the tube 220 based on the output of the bubble sensor 270/271. To do. If it is determined that there is a bubble, the control device 300 stops the rotation of the motor 306 in step S6, and then terminates the processing after outputting an alarm in step S7.

  On the other hand, when it is determined that there are no bubbles in the tube 220, the control device 300 determines in step S5 whether or not the main switch 11a is on. If the main switch 11a is on, the process returns to step S2, and the determinations in steps S2 to S5 are repeated while the motor 306 is rotated. If the main switch 11a is off, the control device 300 stops the rotation of the motor 306 in step S6, and after the alarm is output in step S7, the process ends.

  According to the embodiment, by using the end sensor 250 and the blockage sensor 260, it is possible to reliably detect the end of the chemical liquid and the occurrence of the blockage on the downstream side, and by using the bubble sensor 270/271, Even when bubbles are mixed in the tube, it can be detected, and the operation of the tube cassette 200 at the attachment portion A can be appropriately controlled.

100 Tube pump 10 Upper casing 20 Lower casing 30 Sensor block (Tube holding block)
31, 32 Valleys 33, 34, 35 Protrusion 40 Stopper 50 Sensor frame 51 Subframe 200 Tube cassette 220 Tube 230 Roller 250 End sensor 251 Load sensor 252 Contact portion 260 Blocking sensor 261 Load sensor 262 Contact portion 270 Transmitter (bubble) Sensor)
271 Receiver (bubble sensor)
300 Controller 306 Motor

Claims (7)

In the tube pump for transferring the liquid in the tube by deforming the flexible tube so as to be handled by the drive unit,
An end sensor that is disposed upstream of the drive unit and detects a reduction in the diameter of the tube;
An occlusion sensor that is disposed downstream of the drive unit and detects an increase in the diameter of the tube;
A bubble sensor that is disposed on either the upstream side or the downstream side of the drive unit and detects bubbles in the tube;
When the drive unit is activated by a start instruction, when the end sensor detects that the tube diameter is below the first threshold, and when the occlusion sensor detects that the tube diameter exceeds the second threshold, And a control unit that stops the driving unit when the bubble sensor detects bubbles in the tube,
The end sensor, the blockage sensor, and the bubble sensor are provided in a tube pressing block disposed at a position where the tube is led out from the driving unit, and the tube pressing block is located upstream of the driving unit. And first, second and third protrusions arranged in order so as to form first and second valleys through which the downstream tube passes, and the end sensor is configured as the first sensor. 1. The tube pump according to claim 1, wherein the blockage sensor is disposed in each of the first protrusions, and at least a part of the bubble sensor is disposed in the second protrusion. The end sensor and the occlusion sensor are load sensors that include a contact portion that comes into contact with the tube and detects deformation of the tube.
Openings that expose the contact portions are formed on the side surfaces of the first and third projecting portions of the tube pressing block facing the first and second valley portions,
The end sensor and the blockage sensor can be independently adjusted with respect to the sensor frame fixed to the tube holding block so that the position of the contact portion with respect to the tube can be adjusted in the radial direction of the tube. Supported,
The tube pump according to claim 1, wherein at least a part of the bubble sensor is supported via a subframe with respect to the sensor frame. The bubble sensor is composed of two parts, a transmission unit and a reception unit, one of which is supported by the subframe, and the other is disposed in the contact part of either the end sensor or the blockage sensor. The tube pump according to claim 2. One of the transmission unit and the reception unit constituting the bubble sensor supported by the subframe is:
The tube pump according to claim 3, further comprising a protrusion on the periphery so as not to contact the subframe with a surface. 3. A wedge part that presses at least a part of the bubble sensor toward a tube to be detected when assembled to the second protrusion is formed in the subframe. The tube pump described. A sensor for detecting that the tube is set in the driving unit is provided, and the control unit operates the driving unit on condition that the tube is set by the sensor. Item 2. The tube pump according to Item 1. The tube pump according to claim 6, wherein the blockage sensor is also used as a sensor for detecting that the tube is set in the drive unit.

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