JP2006248132A - Tube pump, liquid injection apparatus and controlling method of the tube pump - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tube pump, or the like which can inform users of the operating condition. <P>SOLUTION: The tube pump 100 is equipped with a tube section 110 for sucking a liquid, a movement contact part 120 arranged so as to be movable along the tube section, a motor section 150 for generating a running torque to make the movement contact part move along the tube section, a rotation detection means 140 for detecting the rotation of the motor section, an operating-condition judgement sections 160, 162 for judging the operating condition of the motor section based on the result detected by the rotation detection means and an indication means 18 for displaying the result judged by the operating-condition judgement section. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a tube pump for sucking liquid, a liquid ejecting apparatus, and a tube pump control method.

2. Description of the Related Art Conventionally, ink jet recording apparatuses have an ink jet recording head for ejecting ink onto recording paper or the like. Since this ink jet recording head discharges ink onto recording paper or the like via a nozzle, the ink thickens in the vicinity of the nozzle or bubbles are mixed in the nozzle, making it impossible to discharge the ink satisfactorily. There was a fear.
For this reason, the ink jet recording apparatus is provided with a head cleaning device in order to avoid these phenomena.

The head cleaning device has a capping unit arranged so as to cover the nozzles and a pump for making negative pressure in the capping unit, and is configured to perform cleaning by sucking ink in the vicinity of the nozzles by the pump. ing.
As the pump, a tube pump having a relatively simple structure and easy to be miniaturized is used (for example, Patent Document 1).
As shown in FIG. 3 and the like of Patent Document 1, the tube pump is configured such that the roller member 21 moves in the counterclockwise direction, for example, while the tube member 20 is crushed by a motor, and sucks ink.
JP 2004-314622 A (FIG. 4 etc.)

If such a tube pump is continuously used beyond its product life, the tube pump may be destroyed, and ink may leak into the device, which may hinder the operation of the device. Further, when the motor part of the tube pump causes a rotation abnormality or the like, the head cleaning cannot be normally performed, and there is a possibility of causing a printing defect or the like.
However, since the tube pump is disposed in the device and it is difficult to grasp the operation state thereof, there is a problem that the user does not notice even if the tube pump is defective.

  Accordingly, an object of the present invention is to provide a tube pump, a liquid ejecting apparatus, and a tube pump control method capable of notifying a user of an operation state.

  According to the present invention, the subject is a tube portion that sucks liquid, a moving contact portion that is movably disposed along the tube portion, and the moving contact portion is moved along the tube portion. And a motor unit that generates a rotational torque for detecting rotation of the motor unit, and an operation state of the motor unit based on a detection result of the rotation detection unit. This is achieved by a tube pump comprising an operation state determination unit that determines the above and a display unit that displays a determination result of the operation state determination unit.

According to the said structure, an operation state judgment part judges the operation state of a motor part based on the detection result of a rotation detection means. The display means displays the determination result of the operation state determination unit.
With respect to the motor part of the tube pump, it is possible to accurately determine whether the motor part is defective or has a high probability of occurrence by grasping its rotation failure, rotation speed, and the like.
Therefore, as in the present invention, the operation state of the motor unit can be accurately grasped by determining the operation state of the motor unit based on the detection result of the rotation detection unit.
In addition, since the operation state grasped with high accuracy is displayed on the display means, the user can accurately grasp the state of the tube pump and can immediately take measures.

Preferably, the tube pump is characterized in that the rotation detecting means is a phase detecting means for detecting the movement of the moving contact portion.
According to the said structure, a rotation detection means is a phase detection means which detects the movement of a movement contact part. For this reason, since the malfunction of the motor unit or the like is determined by the movement of the moving contact portion, it is possible to determine the malfunction or the like more easily and reliably.

Preferably, the tube pump includes a rotation abnormality determination unit that determines a rotation abnormality of the motor unit based on a detection result of the rotation detection unit.
According to the said structure, it has a rotation abnormality judgment part which judges the rotation abnormality of a motor part based on the detection result of a rotation detection means. For this reason, it can notify a user that a tube pump is a suction failure. Therefore, it is possible to prevent the user from using a device having a tube pump in a defective state.

Preferably, the tube pump includes a product life determination unit that determines a product life of the tube pump based on a detection result of the rotation detection unit.
According to the said structure, it has a product life judgment part which judges the product life of a tube pump based on the detection result of a rotation detection means. For this reason, it is possible to prevent the pump from being destroyed due to the product life of the tube pump, and the liquid leaking into the equipment or the like equipped with the tube pump, resulting in malfunction of the equipment.

Preferably, in the tube pump, the product life determination unit determines the product life of the motor unit based on a cumulative rotation number of the motor unit based on a detection result of the rotation detection unit.
According to the said structure, a product life judgment part judges the product life of a motor part from the cumulative rotation speed of a motor part based on the detection result of a rotation detection means. The product life of the motor part can be accurately determined by the accumulated number of revolutions. For this reason, the configuration of the present invention makes it possible to easily and reliably determine the product life.

  According to the present invention, the subject is a tube portion that sucks liquid, a moving contact portion that is movably disposed along the tube portion, and the moving contact portion is moved along the tube portion. A liquid ejecting apparatus including a tube pump having a motor unit that generates a rotational torque for detecting rotation of the motor unit of the tube pump, and a detection result of the rotation detecting unit This is achieved by a liquid ejecting apparatus comprising: an operation state determination unit that determines an operation state of the motor unit based on the display unit; and a display unit that displays a determination result of the operation state determination unit.

  According to the present invention, the subject is a tube portion that sucks liquid, a moving contact portion that is movably disposed along the tube portion, and the moving contact portion is moved along the tube portion. A tube pump control method comprising: a motor unit that generates a rotation torque for detecting rotation of the motor unit; and an operation state determination unit configured to detect rotation of the motor unit. A tube pump control comprising: an operation state determination step for determining an operation state of the motor unit based on a detection result; and a display step for displaying a determination result of the operation state determination unit. Achieved by the method.

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.
The embodiments described below are preferred specific examples of the present invention, and thus various technically preferable limitations are given. However, the scope of the present invention is particularly limited in the following description. Unless otherwise stated, the present invention is not limited to these embodiments.

FIG. 1 is a schematic perspective view showing an ink jet recording apparatus (hereinafter referred to as “recording apparatus”) 10 according to an embodiment of a liquid ejecting apparatus having a tube pump of the present invention.
(About the general configuration of the recording apparatus 10)
As shown in FIG. 1, the recording apparatus 10 includes a frame 11, and a platen 12 is disposed on the frame 11. On the platen 12, the paper P is fed by a paper feed mechanism (not shown).
The carriage 13 is supported by a guide member 14 so as to be movable in the longitudinal direction of the platen 12 and is reciprocated by a carriage motor 15 via a timing belt 16.

An ink jet recording head (hereinafter referred to as “recording head”) 20 is mounted on the lower portion of the carriage 13. The recording head 20 is configured to eject, for example, ink that is a liquid with respect to the paper P.
Specifically, the recording head 20 has a nozzle that ejects ink, and is configured to eject ink droplets from the nozzle by expansion and contraction of a piezoelectric vibrator.
An ink cartridge 17 that contains ink is detachably mounted on the carriage 13, and the ink is supplied from the ink cartridge 17 to the recording head 20.
In other words, while the carriage 13 moves along the platen 12, the piezoelectric vibrator is expanded and contracted based on the print data, so that ink is ejected from the recording head 20 onto the paper P and printing is performed. ing.

In the frame 11 of FIG. 1, the paper P is arranged and has a print region T where printing is performed on the paper P. Further, the frame 11 has a home position H which is a non-printing area on one end side thereof.
The carriage 13 is configured to move between the printing region T and the home position H by moving along the platen 12.

(About composition at home position H)
As shown in FIG. 1, a head cleaning mechanism 30 is disposed at the home position H. The head cleaning mechanism 30 has a cap holder 31 and a tube pump 100. The cap holder 31 is installed on the frame 11 so as to be movable up and down by a known lifting means (not shown).

  The head cleaning mechanism 30 has a cap 32. The cap 32 has a configuration in which the upper end edge of the cap 32 comes into contact with the nozzle plate or the like of the recording head 20 to seal the nozzles of the recording head 20.

As shown in FIG. 1, the recording apparatus 10 includes a display 18, which is a display unit that displays an operation state of the recording apparatus 10, for example, an operation state of a stepping motor 150 described later of the tube pump 100. is doing.
Further, as shown in FIG. 1, the recording apparatus 10 includes a blade 19. The blade 19 is in contact with the nozzle plate of the recording head 20 and performs a wiping operation by wiping off ink.

FIG. 2 is a schematic diagram showing the head cleaning mechanism 30 and the like of FIG.
As shown in FIG. 2, a sheet-like sponge 32 a is disposed at the bottom of the cap 32. The sponge 32a is configured to face the nozzles of the recording head 20 with a predetermined interval in a state where the cap 32 is in contact with the recording head 20, and absorb ink ejected from the nozzles of the recording head 20. .

Furthermore, as shown in FIG. 2, the cap 32 is formed with a discharge port 32b so as to penetrate the bottom surface thereof.
The tube pump 100 is provided in the frame 11 with the cap 32 sealing the nozzles of the recording head 20, reducing the pressure in the cap 32 to a negative pressure, and sucking ink from the nozzles of the recording head 20. The ink is discharged to the waste ink tank 33.

(About main hardware configuration of tube pump 100)
3 is a schematic perspective view showing the main hardware configuration and the like of the tube pump 100, and FIG. 4 is a schematic view showing the internal structure of the tube pump 100 of FIG.
First, as shown in FIG. 4, the tube pump 100 includes a tube 110 that is a tube portion for sucking ink.
The tube 110 has a shape in which both ends of a flexible tube bent in an annular shape are drawn in the same direction and bundled in the same plane.
In addition, the tube pump 100 includes, for example, a pulley 120 that is a moving contact portion that is movably disposed along the inner periphery of the tube 110. The pulley 120 is configured to be rotatable about the pulley central shaft 121.
Further, in order to move the pulley 120 along the inner periphery of the tube 110, the tube pump 100 has a rotating plate 130.

Further, as shown in FIG. 4, a guide groove 131 in which the pulley central shaft 121 moves is formed in the rotating plate 130. That is, the pulley 120 moves in the guide groove 131 so that the distance between the pulley 120 and the tube 110 can be changed.
Specifically, as shown in FIG. 4, the left end in the drawing of the guide groove 131 is a suction end 131a, and the right end in the drawing is a release end 131b.
That is, when the pulley 120 is positioned at the suction end 131a, the pulley 120 is arranged so as to crush the tube 110. Therefore, the pulley 120 crushes the tube 110 clockwise as indicated by an arrow in FIG. As a result, the cap side 110a of the tube 110 has a negative pressure and sucks ink. Then, the ink is discharged to the waste ink tank side 110b of the tube 110.

On the other hand, when the pulley 120 is positioned at the release end 131b of FIG. 4, the pulley 120 moves in a direction not to crush the tube 110, so that the tube pump 100 can be in a non-suction state. .
Further, as shown in FIG. 4, for example, a stepping motor 150 that is a motor unit is connected to the rotating plate 130.
That is, when the stepping motor 150 is driven, the rotating plate 130 rotates and the pulley 120 moves while rolling on the inner peripheral side of the tube 110 by the rotation of the rotating plate 130.
The stepping motor 150 is an example of a motor unit that generates a rotational torque of the rotating plate 130 for moving the pulley 120 along the inner periphery of the tube 110.

As shown in FIG. 3, the tube pump 100 includes a pump frame 101, and the tube 110, the rotating plate 130, the pulley 120, and the like of FIG. 4 are stored in the pump frame 101.
A detection rotating shaft 102 is formed so as to protrude from the pump frame 101. The detection rotating shaft 102 is configured to rotate integrally with the rotating plate 130 of FIG.
A detection rotary plate 103 is attached to the tip of the detection rotary shaft 102, and the detection rotary plate 103 has a notch 103a.

In the vicinity of the detection rotary plate 103, a phase detection device 140, which is a phase detection means for detecting the phase of the rotational operation of the detection rotary plate 103, is arranged. The phase detector 140 includes an optical sensor 141 for detecting the phase of the detection rotating plate 103. The optical sensor 141 includes a light emitting unit 141a that emits light and a light receiving unit 141b that receives the light emitted by the light emitting unit.
That is, as shown in FIG. 3, the light from the light emitting portion 141a is blocked by the detection rotating plate 103 and cannot be detected by the light receiving portion 141b, but the notched portion 103a of the detection rotating plate 103 Then, the light receiving unit 141b can receive the light from the light emitting unit 141a.
Since the detection rotating plate 103 rotates in synchronization with the rotating plate 130 of FIG. 4, the positional relationship between the position of the notch portion 103a and the position of the pulley 120 is unchanged. Moreover, since the optical sensor 141 is fixed, the positional relationship between the optical sensor 141 and the tube 110 is not changed.
Therefore, by detecting the position of the notch 131 a with the optical sensor 141, it is possible to grasp in which part of the tube 110 the pulley 120 is located. In other words, when the optical sensor 141 detects the passage of the notch 103a and then detects the passage of the notch 103a, the pulley 120 has made the tube 110 one rotation (around).

As described above, the position detection device 140 can grasp the number of rotations of the pulley 120, that is, the number of rotations of the stepping motor 150 by grasping the number of passages of the notch 103 a of the detection rotating plate 103. Yes.
That is, the position detection device 140 is an example of a phase detection unit that detects the movement of the pulley 120 and an example of a rotation detection unit that detects the rotation of the stepping motor 150.
Further, since the phase detection device 140 determines the rotation speed of the stepping motor 150 based on the rotation speed of the pulley 120, the phase detection device 140 can easily and reliably determine the operation failure of the stepping motor 150.

FIG. 5 is a schematic block diagram showing a main software configuration and the like of the recording apparatus 10. As shown in FIG. 5, for example, a rotation abnormality determination unit 160 that is a rotation abnormality determination unit that determines rotation abnormality of the stepping motor 150 of FIG. 4 based on the detection result of the phase detection device 18 is provided. That is, when the rotation abnormality determination unit 160 determines that there is an abnormality, the display 18 displays that effect.
Specifically, the rotation abnormality determination unit 160 makes a determination based on data in the abnormality determination data storage unit 161 shown in FIG. The abnormality determination data storage unit 161 stores the normal rotation speed of the pulley 120 according to the cleaning level.
That is, “CL1” with a low cleaning level is 4 rotations, “CL2” with the next lowest cleaning level is 7 rotations, and “10 rotations” is the highest. The ink suction amount at “CL1” is 0.5 g, the ink suction amount at “CL2” is 1 g, and the ink suction amount at “CL3” is 1.5 g. When the printing failure cannot be recovered at CL1, the next cleaning executes “CL2”, and when the printing failure cannot be recovered, “CL3” is executed.
Accordingly, the rotation abnormality determination unit 160 determines whether or not the pulley 120 rotates four times when the cleaning level being executed is “CL1”, for example. indicate.
For this reason, the user of the recording apparatus can know that the tube pump 100 cannot normally suck. Therefore, the user thinks that the cleaning operation is insufficient, and if printing or the like is performed as it is, printing failure may occur, and printing is not continuously performed. Therefore, wasted paper or wasted ink due to printing failure. Is not consumed. Further, even when the pump has failed and rotation is abnormal, cleaning is not repeated.

In addition, the recording apparatus 10 includes, for example, a pump life determination unit 162 that is a product life determination unit that determines the product life of the tube pump 100 based on the detection result of the phase detection device 140. The pump life determination unit 163 is configured to determine the product life of the stepping motor 150 based on the cumulative number of rotations of the stepping motor 150 based on the detection result of the phase detection device 140.
The recording apparatus 10 includes a pump accumulated rotation number storage unit 163 that accumulates and registers the number of rotations of the pulley 120 detected by the phase detection device 140, that is, the number of rotations of the stepping motor 150 from the beginning.
Further, the recording apparatus 10 includes a pump total revolution number determination data storage unit 164. The pump total rotation speed determination data storage unit 164 stores data on the serviceable rotation speed of the tube pump 100, for example, 150,000 rotations.
Therefore, the pump life determination unit 162 obtains the rotation speed data of the stepping motor 150 from the phase detection device 140 and registers it as accumulated data in the pump accumulated rotation speed storage unit 163. When the accumulated total rotation speed reaches “150,000 rotations” in the pump total rotation speed determination data storage unit 164, it is determined that the tube pump 100 has reached the service life, and the display 18 Display.

The tube pump 100 has a product life, and this product life can be determined by the number of rotations of the stepping motor 150 included in the tube pump 100. That is, if the stepping motor 150 exceeds the serviceable rotation speed, the tube pump 100 may be destroyed, and if this occurs, ink leaks into the recording apparatus 10 and the recording apparatus 10 malfunctions. There is a risk of causing this.
Here, the cumulative total number of revolutions may be a method of accumulating the number of revolutions determined by the cleaning level. However, when there is a malfunction of the tube pump 100, the number of times the pump has actually rotated is different from the predetermined number. For this reason, it may be determined that the number of service life has been reached even though the tube pump service life has not been reached.
However, in the present embodiment, the pump life determination unit 162 can determine whether or not the tube pump 100 is in a state in which the tube pump 100 is broken from the number of rotations of the actual pump rotation. In such a case, the danger is displayed on the display 18 in advance. For this reason, the user can continue to use until the tube pump 100 is actually destroyed.
Further, since the breakage of the tube pump 100 is determined by the cumulative number of rotations of the stepping motor 150, the determination can be performed easily and reliably.

The rotation abnormality determination unit 160 and the pump life determination unit 162 are an example of an operation state determination unit that determines the operation state of the stepping motor 150 based on the detection result of the phase detection device 140. The display 18 is an example of a display unit that displays the determination result of the operation state determination unit.
As in the present embodiment, the stepping motor 150 of the tube pump 100 has a high probability of occurrence of defects or the like in the stepping motor 150 by grasping the rotation failure and the rotation speed. Whether or not can be determined with high accuracy.
For this reason, the operation state of the stepping motor 140 can be accurately grasped by determining the operation state of the stepping motor 140 based on the detection result (the number of rotations) of the phase detection device 140. In addition, since the operation state grasped with high accuracy is displayed on the display 18, the user can accurately grasp the state of the tube pump 100 and can take measures immediately.

The recording apparatus 10 according to the present embodiment is configured as described above, and the operation example will be described in detail below.
FIG. 6 is a schematic flowchart showing the cleaning process. First, as shown in ST1 of FIG. 6, a carriage moving process and a cap opening process are performed. That is, the carriage 13 in FIGS. 1 and 2 is separated from the home position H, and the cap 32 is separated from the recording head 20.
Next, ST2 pump forward rotation, low speed, and a step of meshing the pulley and the tube. That is, initially, the pulley central shaft 121 of the pulley 120 is disposed on the release end 131b side in the guide groove 131 formed in the rotating plate 130 of FIG. For this reason, when the rotating plate 130 is moved at a low speed in the direction of the arrow in FIG. 4, the pulley center shaft 121 moves in the guide groove 131 and is disposed on the suction end 131 a side. Then, the pulley 120 is disposed so as to crush the tube 110, becomes a meshing position, and becomes a position where ink can be sucked.
However, since the cap 32 is separated from the recording head 20 at this time, ink cannot be sucked from the recording head 20.

Then, while the tube pump 100 is rotated, it is determined in ST3 whether or not the optical sensor is in an ON state. If the optical sensor is in the ON state, the tube pump 100 stops (ST4). If the optical sensor is not in the ON state, the determination in ST3 is repeated. That is, the pump is rotated until the optical sensor is turned on, and thereby, the rotation start position of the pulley 120 of the ink suction operation performed in ST7 is made constant, and variations in the ink suction amount are suppressed.
In ST5, a carriage moving process and a cap closing process are performed. That is, the carriage 13 in FIG. 2 moves to the home position H, the cap 32 comes into contact with the nozzle plate or the like of the recording head 20, and the cap is closed.
Next, the rotational speed of the optical sensor is reset to “0” (ST6). Then, pump forward rotation (high speed) and a predetermined number of rotations are performed (ST7). That is, the pulley 120 of FIG. 4 moves the tube 110 along the arrow direction and sucks ink. At this time, the number of rotations of the pulley 120 is determined by the cleaning level. For example, “CL1” is 4 rotations.
A rotation instruction is given to the stepping motor 150 in order to rotate the pulley at a predetermined rotation number, for example, four rotations. Thereafter, a step of releasing the negative pressure in the cap 32 is performed by keeping the cap 32 without moving downward in FIG.

By the way, while the processes of ST7 and ST8 are being performed, the process of the optical sensor measuring the rotational speed is performed at ST9. That is, the phase detection device 140 of FIG. 3 measures the rotation speed of the pulley 120 by detecting the passage of the notch 103 a of the detection rotating plate 103.
Next, in ST10, it is determined whether the optical sensor rotational speed is a predetermined rotational speed. That is, the rotation abnormality determination unit 160 in FIG. 5 obtains, for example, data that “CL1” is “4 rotations” from the abnormality determination data storage unit 161, and the number of rotations of the pulley 120 measured in ST9. (An example of an operation state determination step).
As a result of the comparison, for example, when the number of rotations measured in ST9 is less than four, sufficient ink suction as the cleaning level “CL1” cannot be performed and is in a defective state. (ST11) (an example of a display process).
Therefore, the user who sees the display on the display 18 can immediately recognize that the cleaning failure has occurred, and can move the carriage 13 to the printing region T and perform printing or the like on the paper P in the defective state. Absent. For this reason, it is possible to prevent printing defects from occurring on the paper P, and it is possible to suppress wasteful ink consumption.

  Next, in ST12, the total number of revolutions of the pump is calculated by adding the number of revolutions of the optical sensor to the cumulative number of revolutions of the pump. That is, the rotation speed measured in ST9 is added to the previous accumulated rotation speed stored in the pump accumulated rotation speed storage unit 163 in FIG. Therefore, the value of the pump cumulative rotation number storage unit 163 is updated to the latest rotation number.

Next, the carriage movement and cap opening process of ST13 is performed. That is, the cap 32 in FIG. 2 moves downward, which is a direction away from the recording head 20, and the carriage 13 moves from the home position H.
Next, the process of ST14 is performed. That is, the stepping motor 150 is moved, and the pulley 120 is rotated five times at high speed in the direction of the arrow in FIG. Then, the ink remaining in the cap 32 is discharged into the waste ink tank 33, and the cap empty suction process is performed.
Then, the optical sensor measures the rotation speed (ST15).

Next, step ST16 is performed. That is, the total rotational speed of the pump is updated by adding the rotational speed of the optical sensor to the cumulative pump speed in the pump cumulative speed storage unit 163 in FIG. Next, in ST17, a wiping operation is performed in which the nozzle plate of the recording head 20 is wiped by the blade 19 shown in FIG.
Next, step ST18 is performed. That is, the stepping motor 150 is operated in the direction opposite to the arrow in FIG. 4 to move the pulley 120 twice at high speed. Thereby, the pulley central shaft 121 of the pulley 120 moves the guide groove 131 from the suction end 131a to the release end 131b. That is, the pulley 120 moves from a direction in which the tube 110 is crushed to a direction in which the tube 110 is not crushed, and is disposed at a so-called pump release position.
In the pump reverse rotation operation, since the state where the pulley 120 is crushing the tube 110 is short, it is not necessary to measure the rotational speed with an optical sensor and add it to the accumulated total rotational speed.

Next, in ST19, it is determined whether the total pump rotational speed is 150,000 times or more. That is, the pump life determination unit 162 in FIG. 5 determines whether or not the latest rotation number in the pump cumulative rotation number storage unit 163 is 150,000 rotations or more of the pump total rotation number determination data storage unit 164 (operation). An example of a state determination process).
If the total pump rotational speed is 150,000 times or more, the tube pump 100 may be destroyed, and an error display to that effect is displayed (an example of a display process) (ST20).
Therefore, the user can know that the tube pump 100 has reached the end of its service life and is in danger of being destroyed, so that necessary measures can be taken, and ink can be taken into the recording apparatus 10 due to destruction of the tube pump 100 or the like. Leakage can be prevented in advance.
On the other hand, when the total pump rotational speed is less than 150,000 times, the process ends without displaying an error.

  The present invention is not limited to the above-described embodiment. The present invention is not limited to an ink jet recording apparatus, but a recording head used in an image recording apparatus such as a printer, a color material ejecting head used in manufacturing a color filter such as a liquid crystal display, an organic EL display, and an FED (surface emitting). Electrode material ejection heads used for electrode formation such as displays), liquid ejection devices using liquid ejection heads that eject liquids such as bio-organic matter ejection heads used in biochip manufacturing, sample ejection devices as precision pipettes, etc. Applicable.

1 is a schematic perspective view showing an ink jet recording apparatus according to an embodiment of a liquid ejecting apparatus having a tube pump of the present invention. It is the schematic which shows the head cleaning mechanism etc. of FIG. It is a schematic perspective view which shows the main hardware structures etc. of a tube pump. It is the schematic which shows the internal structure of the tube pump of FIG. It is a schematic block diagram which shows the main software structures etc. of a recording device. It is a schematic flowchart which shows a cleaning process.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Inkjet recording device, 100 ... Tube pump, 101 ... Pump frame, 102 ... Detection rotating shaft, 103 ... Detection rotating plate, 103a ... Notch part, 110 ... Tube, 120 ... Pulley, 130 ... Rotating plate, 140 ... Phase detector, 141 ... Optical sensor, 141a ... Light emitting part, 141b ... Light receiving part, 150 ... Stepping motor, 160 ... Rotation abnormality determination unit, 161 ... Abnormality determination data storage unit, 162 ... Pump life determination unit

Claims (7)

A tube section for sucking liquid;
A moving contact portion that is movably disposed along the tube portion;
A motor unit that generates a rotational torque for moving the moving contact part along the tube part,
Rotation detection means for detecting rotation of the motor unit;
An operation state determination unit that determines an operation state of the motor unit based on a detection result of the rotation detection unit;
A tube pump comprising: a display unit configured to display a determination result of the operation state determination unit.   2. The tube pump according to claim 1, wherein the rotation detecting means is a phase detecting means for detecting movement of the moving contact portion.   3. The tube pump according to claim 1, further comprising a rotation abnormality determination unit that determines a rotation abnormality of the motor unit based on a detection result of the rotation detection unit.   The tube pump according to any one of claims 1 to 3, further comprising a product life determination unit that determines a product life of the tube pump based on a detection result of the rotation detection unit.   5. The tube pump according to claim 4, wherein the product life determination unit determines the product life of the motor unit based on a cumulative rotation speed of the motor unit based on a detection result of the rotation detection unit. A tube section for sucking liquid;
A moving contact portion that is movably disposed along the tube portion;
A liquid ejecting apparatus comprising a tube pump having a motor part that generates a rotational torque for moving the moving contact part along the tube part,
Rotation detection means for detecting rotation of the motor portion of the tube pump;
An operation state determination unit that determines an operation state of the motor unit based on a detection result of the rotation detection unit;
A liquid ejecting apparatus comprising: a display unit configured to display a determination result of the operation state determination unit. A tube section for sucking liquid;
A moving contact portion that is movably disposed along the tube portion;
A motor part that generates a rotational torque for moving the moving contact part along the tube part,
Having rotation detection means for detecting rotation of the motor section;
An operation state determination step in which an operation state determination unit determines an operation state of the motor unit based on a detection result of the rotation detection unit;
A tube pump control method, comprising: a display step of displaying a determination result of the operation state determination unit.

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