JP5238423B2 - Inkjet recording device - Google Patents

Inkjet recording device Download PDF

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Publication number
JP5238423B2
JP5238423B2 JP2008239508A JP2008239508A JP5238423B2 JP 5238423 B2 JP5238423 B2 JP 5238423B2 JP 2008239508 A JP2008239508 A JP 2008239508A JP 2008239508 A JP2008239508 A JP 2008239508A JP 5238423 B2 JP5238423 B2 JP 5238423B2
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blade
cleaner
ink
blade support
recording head
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JP2010069717A (en
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正夫 塩谷
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理想科学工業株式会社
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Description

  The present invention relates to an ink jet recording apparatus, and more particularly to an ink jet recording apparatus equipped with a wiping mechanism for cleaning a nozzle plate of an ink jet recording head.

  Ink jet recording apparatuses that are generally used have a recording head maintenance system, and it is essential to remove ink and dust adhering to the nozzle plate of the recording head. This is because if ink droplets or dust adhere to the periphery of the nozzle that selectively ejects ink to form an image, the ejected ink does not fly straight from the nozzle toward the recording medium, but bends. End up. As a result, the image may be disturbed and the image quality may be impaired.

  Further, if the amount of ink droplets adhering to the nozzle plate is large, the ink droplets come into contact with the recording medium conveyed in proximity to the nozzle plate, resulting in paper stains or image stains. Therefore, the print quality is also deteriorated.

  In order to prevent such deterioration in image quality, ink droplets and dust are removed by wiping the nozzle plate with a wiper blade before and after the recording operation. As the wiper blade, a flexible rigid body such as rubber or an ink absorber made of a porous member is usually used. The wiper blade is moved while being in close contact with the nozzle plate, so that ink droplets, dust and the like can be removed.

  For example, Patent Literature 1 below includes a print head, a wiper blade made of a non-ink-absorbing elastic member that wipes the nozzle surface of the print head, and an ink absorber that absorbs and removes ink adhering to the wiper blade. In the ink jet printer, the ink absorber is provided with a contact surface that comes in contact with the surface of the wiper blade on which the print head is wiped. It describes that ink adhering to the blade is absorbed and removed.

Patent Document 2 below includes a print head, a wiper blade made of a non-ink absorbing elastic member that wipes the nozzle surface of the print head, and an ink absorber that absorbs and removes ink adhering to the wiper blade. The ink absorber is connected to the ink absorber via an ink transmission member, and the ink absorbed by the ink absorber is transmitted to the waste ink absorber using capillary action. There is a statement to that effect.
Japanese Patent Laid-Open No. 9-57992 JP-A-3-293151

  However, in the configurations described in Patent Documents 1 and 2 described above, the wiper blade is brought into contact with an ink absorber as a cleaner so that the ink adhering to the wiper blade is absorbed by the cleaner. However, the cleaner part with which the wiper blade contacts is always the same.

  For this reason, when cleaning of the wiper blade is performed a plurality of times, the cleaner portion where the wiper blade always abuts is immediately saturated with the absorbed ink, and the ink adhering to the wiper blade increases as the number of cleanings increases. Has a problem of not being able to absorb the sufficient amount.

  Accordingly, the present invention has been made in view of the above circumstances, and an object of the present invention is to sequentially change the site of the cleaner with which the wiper blade contacts, and to bring the wiper blade into contact with the site of the cleaner having a small amount of absorbed ink. Then, it is providing the inkjet recording device which can maintain the cleaning property of a wiper blade favorable several times.

That is, the ink jet recording apparatus of the present invention adheres to the nozzle plate of the recording head in the ink jet recording apparatus that records an image by ejecting ink toward the recording medium from the nozzles provided on the nozzle plate of the recording head. A blade for wiping off the ink, a first driving means for moving the blade within a predetermined range along the longitudinal direction of the recording head, and a blade abutting on the blade. A cleaner that absorbs ink adhering to the blade by contact, and the first driving means, and the portion of the cleaner that contacts the blade is changed each time the blade contacts the cleaner ; and cleaning position change hands to shift the abutment and the stop position of the blade relative to the cleaner per cleaning Characterized by comprising the, the.


  According to the present invention, the cleaning part of the wiper blade is maintained in good condition over a plurality of times by sequentially changing the cleaner part with which the wiper blade comes into contact and bringing the wiper blade into contact with the part of the cleaner having a small amount of absorbed ink. An ink jet recording apparatus capable of performing the above can be provided.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
FIG. 1 is a schematic view of the schematic configuration of the recording head 10, the wiping mechanism 20, and the cleaner 30 in the ink jet recording apparatus 1 according to the first embodiment of the present invention, and FIG. 2 is a schematic view of the cleaner 30 of FIG. 1. FIG. 3 is a block diagram showing only a control system related to cleaning of the wiper blade in the ink jet recording apparatus.

  In this embodiment, components of a normal image forming apparatus, that is, a recording medium supply mechanism, a transport mechanism, a discharge mechanism, an image processing unit, a control unit, and other maintenance mechanisms are used for normal image formation. Since the same apparatus as that of the forming apparatus is mounted, illustration and description thereof will be omitted, and the wiping mechanism 20 which is a characteristic part of the present invention and the recording head 10 related to the wiping mechanism 20 will be illustrated and described.

  The recording head 10 in the ink jet recording apparatus 1 of the present embodiment may be either a piezo type or a thermal type due to heat generated by a heater. The shape of the recording head 10 is, for example, longer than the width of the recording medium in a direction (width direction) orthogonal to the traveling direction of the recording medium. The recording head 10 is fixed to a frame or the like of an image forming apparatus (not shown), and forms an image by ejecting ink onto a recording medium that is transported and passes in front of the nozzles.

  Further, a plurality of short recording heads shorter than the width of the recording medium may be connected and arranged so as to have a length equal to or greater than the width of the recording medium.

  The recording head is not limited to a fixed head, and an ink tank that stores a small amount of ink is detachably mounted, or an ink chamber having a function of filling ink is mounted, and scanning is performed. The present invention can also be applied to a moving scanning recording head.

  The wiping mechanism 20 includes a blade portion 21, a blade support body 22 that supports the blade portion 21, a guide rail 23 that regulates the moving direction of the blade support body 22, and a driving device that applies a driving force to the blade support body 22 (described later). Blade support driving motor 44).

The blade portion 21 is made of a porous material rich in ink absorbability and is implanted on the blade support portion 22. As the porous material that can be used, the following materials are typical. Alternatively, the following or other materials can be used as long as the wettability with ink can be confirmed.
Polyurethane
polyethylene
Chloroprene rubber
Natural rubber
Ethylene propylene (EPDM) rubber
Nitrile rubber
Butyl rubber
Fluorine
Silicon rubber
EVA rubber (ethylene vinyl acetate copolymer)
The pore diameter is 500 μm or less, preferably about 50 μm.

  The blade support portion 22 engages with the guide rail 23 and is configured to be movable along the extending direction of the guide rail 23. The blade support portion 22 is moved along the guide rail 23 by a blade support driving motor 44, which will be described later. Move. The range of movement of the blade support 22 on the guide rail 23 is between the stoppers 24 a and 24 b provided at both ends of the guide rail 23. A state where the blade portion 21 is in contact with the stopper 24 a is a home position, and is a position where the wiping to the nozzle plate 11 is started. The state where the blade portion 21 is in contact with the stopper 24b is the cleaning position.

  The guide rail 23 has a shaft shape extending along the nozzle arrangement direction of the recording head 10. The guide rail raising / lowering motor 45 can take two positions, a wiping position close to the recording head 10 and a retreating position away from the recording head 10 depending on the situation (FIG. 1 shows the wiping position). )

  When the guide rail 23 is in the wiping position, that is, in the state where the guide rail 23 is positioned closer to the recording head 10 (position shown in FIG. 1), the tip of the blade portion 21 on the blade support 22 is It is located higher than the nozzle plate 11 of the recording head 10 and overlaps. On the other hand, in the state where the guide rail 23 is positioned at the retracted position, that is, the position where the guide rail 23 is away from the recording head 10, the tip of the blade portion 21 on the blade support 22 is positioned on the recording head 10. It is separated from the nozzle plate 11 so that it does not come into contact.

  With the guide rail 23 in the wiping position, the blade support 22 is moved along the guide rail 23 by the blade support driving motor 44, so that the nozzle plate 11 and the like of the recording head 10 can be wiped. It becomes.

  A cleaner 30 is disposed on the side of the recording head 10 on the extension line in the nozzle arrangement direction of the recording head 10 and above the stopper 24 b of the guide rail 23.

  The cleaner 30 includes an ink absorber 31 formed in a roller shape, a rotary shaft 32 disposed in the center of the ink absorber 31, and a bearing 33 that rotatably supports the rotary shaft 32. Yes.

  The ink absorber 31 is composed of a porous member capable of absorbing ink, and an average pore diameter smaller than the average pore diameter of the blade portion 21 is selected. The porous material is selected from the same material candidates as those of the blade portion 21 described above. The pore diameter is preferably less than 100 μm, preferably about 30 μm from the viewpoint of capillary force.

  The shape of the ink absorber 31 is such that the end of the ink absorber 31 on the guide rail 23 side (the lower end of the ink absorber 31 in FIG. 1) is closer to the guide rail 23 than the nozzle plate 11 of the recording head. And the height position of the bearing is set. For the shaft 32 and the bearing 33, dimensional tolerances and materials are selected so that the shaft 32 can rotate even with a very light force.

  The control system for cleaning the wiper blade of the inkjet recording apparatus 1 includes a control unit 40, a blade support driving motor 44, and a guide rail lifting / lowering motor 45.

  The control unit 40 controls not only a control system having a function as a cleaning position changing unit but also the entire inkjet recording apparatus 1. The controller 40 has a timer 41, which is used for driving control of the blade support 22 and the guide rail 23, as will be described later.

  The blade support driving motor 44 is a drive device as first drive means for moving the blade support 22 along the guide rail 23. The guide rail raising / lowering motor 45 is a driving device as second driving means for raising / lowering the guide rail 23 while supporting the blade support 22. The blade support driving motor 44 and the guide rail lifting / lowering motor 45 are driven by a command from the control unit 40.

  Next, regarding the operation of wiping the nozzle blade 11 of the recording head 10 by the wiping mechanism 20 configured as described above, refer to the operation explanatory diagrams of FIGS. 4A to 4I, FIGS. 6 and 7, and the flowchart of FIG. I will explain.

  FIG. 4A shows a state immediately before the guide rail 23 is positioned at the wiping position, the blade support 22 is positioned at the home position, and the blade support 22 is moved in the direction of the arrow A shown in FIG. Indicates the state. Then, at the start of wiping, in step S1, as shown in FIG. 6, the drive time t1 of the blade support drive motor 44, the stop time t2 of the blade support 22 at the stopper 24b, and the guide rail lifting motor 45 The driving time t3 and the number of times of wiping w1 are set.

  Next, in step S2, the timer count value tw relating to the blade movement time in the wiping direction, the timer count value ts relating to the stop time at the position of the stopper 24b, and the timer count value tg relating to the raising / lowering time of the guide rail are reset, respectively. The wiping count value w is reset. In step S3, the blade support driving motor 44 is turned on, and the timer count (tw) is started. As a result, the blade support 22 starts to move in the direction indicated by the arrow A, and wiping is started.

  FIG. 4B is a diagram schematically showing the state of the wiping mechanism 20 and the recording head 10 during wiping.

  As described above, driving force is applied to the blade support 22 by driving the blade support driving motor 44, and the blade support 22 is moved along the guide rail 23 in the direction of arrow A. Then, the blade portion 21 comes into contact with the surface of the nozzle plate 11, and the blade support 22 is moved in the direction of arrow A while the ink droplets adhering to the nozzle plate 11 are absorbed by the capillary phenomenon.

  Here, the right side of the recording head 10 shows a state where it has not been wiped yet. 4A and 4B show a state in which pressure is applied to the recording head 10 via an ink path (not shown) and the ink is ejected from the nozzles and dropped as the purge droplets 13 on the nozzle plate 11. As soon as the purge liquid droplet 13 comes into contact with the blade portion 21, the purge droplet 13 is absorbed by the blade portion 21 of the porous material having a large pore diameter and penetrates into the inside thereof.

  FIG. 4C is a schematic diagram illustrating a state in which wiping on the surface of the nozzle plate 11 is completed and the blade portion 21 is positioned between the recording head 10 and the cleaner 30. The blade portion 21 absorbs ink by contact with the nozzle plate 11. Since the absorbed ink is removed by the cleaner 30, the blade support 22 is further moved from this state in the direction of the arrow A in the figure.

  FIG. 4D is a schematic diagram showing a state in which the blade portion 21 is in contact with the ink absorber 31 of the cleaner 30, the blade portion 21 is curved, and is about to move further in the illustrated arrow A direction.

  By bringing the blade portion 21 into contact with the ink absorber 31, the ink held in the porous pores of the blade portion 21 is transmitted into the porous pores of the ink absorber 31 by capillary action. Can do. Further, when the blade portion 21 is pressed against the ink absorber 31, the degree of curvature of the blade portion 21 is gradually increased.

  At this time, since the blade support 22 has moved in the direction of the arrow A in the drawing, the degree of adhesion between the blade portion 21 and the ink absorber 31 gradually increases. Then, the moving force of the blade support 22 in the direction of arrow A is transmitted to the ink absorber 31 as a force for rotating the ink absorber 31 in the direction of the arrow p in the figure. As a result, the ink absorber 31 rotates in the direction indicated by the arrow p as the blade support 22 moves.

  The ink absorber 31 has a pore diameter smaller than that of the porous material of the blade portion 21. For this reason, the capillary force is larger than that of the blade portion 21, and the ink absorbed by the blade portion 21 can be sufficiently absorbed.

  FIG. 4E is a schematic view showing a state in which the blade support 22 is brought into contact with the stopper 24b and the movement in the direction of the arrow A is stopped.

  By the way, during the wiping shown in FIGS. 4A to 4D, in step S4, the timer count value tw is monitored to determine whether or not the driving time t1 of the blade support driving motor 44 has been reached. As a result, when the timer count value tw reaches the drive time t1, the process proceeds to step S5, the blade support driving motor 44 is turned off, and the timer count tw is ended and reset. At this time, the blade portion 21 has already been in contact with the ink absorber 31, and the ink absorber 31 has finished rotating.

  Then, as the movement of the blade support 22 stops, the rotation of the ink absorber 31 in the arrow p direction also stops. At this time, the blade portion 21 is most strongly pressed against the ink absorber 31 by contact with the ink absorber 31, and the ink held inside is transmitted toward the ink absorber 31.

  As the ink absorber 31, the contact portion with the blade portion 21 is always the same until the movement of the blade support 22 stops after the blade portion 21 starts to contact, 21 absorbs ink. Then, the contact portion is gradually moved in the direction of the arrow p by the rotation of the ink absorber 31 in the direction of the arrow p, and the rotation is stopped at the position shown in FIG. This state is maintained for a predetermined time in order to sufficiently transfer the ink adhered to the cleaner 30 to the cleaner 30. That is, in order to stop the blade part 21 in a state where it is in contact with the cleaner 30, the stop time count ts is started in step S6.

  In step S7, the timer count value ts is monitored to determine whether or not the stop time t2 of the blade support 22 has been reached. As a result, if the timer count value ts has reached the stop time t2, the process proceeds to step S8, where the timer count ts is ended and reset, and the guide rail raising / lowering motor 45 is turned on. Thereby, the guide rail 23 is lowered.

  FIG. 4F is a schematic view showing a state where the guide rail 23 supporting the blade support 22 is moved in the direction of the arrow B so as to move away from the recording head 10 and the blade portion 21 is separated from the ink absorber 31. FIG.

  When the wiping of the nozzle plate 11 and the cleaning of the blade portion 21 are completed (in practice, when the above-described predetermined time has elapsed), the guide rail 23 is moved (lowered) in the direction of arrow B. As the guide rail 23 is lowered, the blade support 22 and the blade portion 21 engaged with the guide rail 23 are also lowered, and the blade portion 21 is separated from the ink absorber 31.

  In the process in which the blade portion 21 is descending (from the close contact state to the separation), the ink absorber 31 does not rotate or slightly rotates in the direction of the arrow p, but the blade portion 21 is separated. After that it does not rotate.

After the blade part 21 is separated, the ink absorber 31 completely stops rotating and maintains its state. That is, before and after the cleaning of the blade part 21, the ink absorber 31 rotates in the direction of the arrow p, and the part in contact with the blade part 21, that is, the part 31 1 that has absorbed the ink also moves in the direction of the arrow p. It will be done.

  In step S9, a timer count (tg) is started. Further, in step S10, the timer count value tg is monitored to determine whether or not the driving time t3 of the guide rail raising / lowering motor 45 has been reached. As a result, if the timer count value tg reaches the driving time t3, the process proceeds to step S11, where the guide rail raising / lowering motor 45 is turned off, and the timer count tg ends and is reset. That is, the lowering of the guide rail 23 is stopped. At this time, the blade portion 21 is separated from the ink absorber 31 of the cleaner 30.

  Next, in step S12, the blade support driving motor 44 is turned on to be driven in the reverse direction, and the timer count tw is started. As a result, the blade support 22 starts to move in the direction of arrow C in FIG. 4G. In subsequent step S13, the timer count value tw is monitored to determine whether or not the driving time t1 of the blade support driving motor 44 has been reached. As a result, if the timer count value tw reaches the drive time t1, the process proceeds to step S14, the blade support driving motor 44 is turned off, and the timer count tw is ended and reset. Further, the guide rail raising / lowering motor 45 is turned on to be driven in the reverse direction.

  FIG. 4G is a schematic diagram showing a state where the blade support 22 is moved in the direction of the arrow C in order to return the blade support 22 to the home position on the guide rail 23.

  As described above, when the lowering of the guide rail 23 is completed, the blade support 22 is moved in the direction of arrow C by the blade support drive motor 44. Since the height of the nozzle plate 11 is higher than the lower end of the ink absorber 31, the blade portion 21 does not contact the nozzle plate 11 while moving in the arrow C direction. When the blade support 22 comes into contact with the stopper 24a, the movement of the blade support 22 in the direction of arrow C is stopped.

  Next, in step S15, a timer count (tg) is started to raise the guide rail 23. In step S16, the timer count value tg is monitored to determine whether or not the driving time t3 of the guide rail raising / lowering motor 45 has been reached. As a result, if the timer count value tg reaches the drive time t3, the process proceeds to step S17, where the guide rail raising / lowering motor 45 is turned off, and the timer count tg ends and is reset. That is, the raising of the guide rail 23 is stopped.

  Thereafter, the number of wiping operations w1 is incremented in step S18. In step S19, it is determined whether or not a predetermined wiping count w has been reached. If the predetermined wiping count w has not yet been reached, the process proceeds to step S3 and the above-described processing operation is repeated. On the other hand, when the predetermined wiping count w is reached, the wiping operation ends.

Thus, when the wiping operation of the recording head 10 and the cleaning operation of the blade portion 21 are performed after the next time, as shown in FIGS. 4H and 7, the range 35 2 where the blade portion 21 abuts on the ink absorber 31, Unlike the portions 35 1 and 31 1 in the previous cleaning, the portion 31 2 that has absorbed ink in the absorber 31 is in contact with the blade portion 21 at a portion that still has sufficient ink absorption capability. Become.

  Therefore, according to the present embodiment, when the cleaning operation of the blade portion 21 is performed, the blade always comes into contact with different parts of the ink absorber 31 (parts having high ink absorption capability). It becomes possible to maintain a good cleaning characteristic over a long period of time.

  According to the present embodiment, it is possible to bring out better cleaning characteristics by making the pore diameter of the ink absorber larger than the pore diameter of the blade portion.

  Further, according to the present embodiment, the ink absorber is rotated in order to change the portion that comes into contact with the blade portion. However, the ink absorber is rotated only by pressing the blade portion. There is no need to provide a separate drive mechanism, which can contribute to size reduction and cost reduction.

(Modification of the first embodiment)
Next, a modification in the first embodiment of the present invention will be described.

  8A to 8D are diagrams for explaining the operation of the wiping mechanism in the modification of the first embodiment of the present invention.

  In the embodiments and modifications described below, the basic configuration and operation of the ink jet recording apparatus are the same as those in the first embodiment described above, and therefore the same parts are avoided to avoid duplication of explanation. Are denoted by the same reference numerals, illustration and description thereof are omitted, and only different portions will be mainly described.

  This modification is different from the first embodiment described above in that the cleaner 30 is disposed between the home position of the blade support 22 and the recording head 10.

  FIG. 8A shows that the guide rail 23 is positioned at the wiping position, the blade support 22 is positioned at the home position, and the blade support 22 is moved in the direction of the arrow A in FIG. Indicates the state. In the state at the start of wiping, the blade portion 21 does not absorb ink even if it comes into contact with the absorber 31 of the cleaner 30. Therefore, as in the first embodiment described above, as shown in FIG. 8B, the blade support 22 is moved in the direction indicated by the arrow A, and the ink droplets on the nozzle plate 11 are absorbed.

  FIG. 8C is a schematic diagram illustrating a state of the blade support 22 immediately before the nozzle plate wiping is finished and just before contacting the cleaner 30. At this time, since the blade support portion 22 is not yet in contact with the cleaner 30, the cleaner 30 is not displaced at all. The blade support 22 is still moving in the A direction at this time.

  FIG. 8D is a schematic diagram showing that the blade support 22 is in contact with the cleaner 30 and that the blade support 22 is moving in the A direction.

  In this case, as the blade support 22 moves while abutting (adhering) to the cleaner 30, the cleaner 30 rotates in the direction indicated by the arrow p due to friction with the blade support 22. The cleaner 30 absorbs ink adhering or absorbing to the blade portion 21 while in close contact with the blade support 22.

  In the next and subsequent cleaning operations, the blade portion 21 comes into contact with the ink absorber 31, so that the ink held in the porous pores of the blade portion 21 by the capillary phenomenon is perforated by the ink absorber 31. Can be transmitted into quality pores. At this time, since the blade support 22 is moved in the direction of the arrow A in the figure, the force that moves the blade support 22 in the direction of the arrow A is the force that rotates the ink absorber 31 in the direction of the arrow p in the figure. It is transmitted to the ink absorber 31. As a result, as the blade support 22 moves, the ink absorber 31 rotates by a predetermined amount in the direction indicated by the arrow p.

  With this configuration, when performing the cleaning operation of the blade portion 21, the blade portion 21 always abuts against different parts of the ink absorber 31 before contacting the surface of the nozzle plate 11. . Therefore, also in this modification, it is possible to maintain good cleaning characteristics over a long period of time, as in the first embodiment described above.

(Second Embodiment)
Next, a second embodiment of the present invention will be described.

  In the first embodiment described above, the blade is brought into contact with a different part of the ink absorber by rotating the cleaner. However, the present invention is not limited to this. In the second embodiment of the present invention, the stop position of the blade portion is extended for each cleaning (sequentially shifted to the right).

  9A to 9D are diagrams for explaining the operation of the wiping mechanism of the ink jet recording apparatus according to the second embodiment of the present invention. FIG. 10 is a diagram illustrating the wiping of the ink jet recording apparatus according to the second embodiment. FIG. 11 is a flowchart for explaining the operation, and FIG. 11 is a diagram for explaining the wiping operation in the second embodiment.

  In the second embodiment, the cleaner 50 includes an ink absorber 51 that is adjacent to the recording head 10 and disposed on an extension in the blade movement direction. Further, the surface of the ink absorber 51 that contacts the blade portion 21 is disposed slightly lower than the lower surface of the nozzle plate 11.

  Next, an operation of wiping the nozzle blade 11 of the recording head 10 by the wiping mechanism configured as described above will be described with reference to FIGS. 9A to 9D, operation explanatory diagrams of FIG. 11, and a flowchart of FIG.

  Note that steps S22 to S23, S25 to S32, S34 to S37, and steps S39 to S40 in the flowchart of FIG. 10 are steps S2 to S3, S5 to S12, S14 to S17, and step S18 of the flowchart of FIG. Since the same processing as in S19 is performed, the corresponding step number is referred to and the description thereof is omitted here.

  At the start of wiping, as shown in FIG. 11, in step S21, as shown in FIG. 11, the driving time initial value t11 of the blade support motor 44, the stop time t2 of the blade support 22 at the stopper 24b, the guide rail lifting motor 45 The driving time t3 and the number of times of wiping w1 are set.

  Next, in step S22, the timer count values tw, ts, and tg are reset, and the wiping count value w is reset. In step S23, the blade support driving motor 44 is turned on, and the timer Counting (tw) is started. As a result, the blade support 22 starts to move in the direction indicated by the arrow A, and wiping is started.

  FIG. 9A is a schematic diagram showing a state in which the blade portion 21 moves in the direction of the arrow A and is in contact with one end (left end) of the lower surface of the ink absorber 51 of the cleaner 50, which is the first stop position. It is. In this way, when the blade portion 21 abuts on the ink absorber 31, the ink held in the porous pores of the blade portion 21 is brought into the porous pores of the ink absorber 31 by capillary action. Can be communicated.

During wiping, in step S24, the timer count value tw is monitored to determine whether or not the blade support driving motor 44 driving time initial value t11 has been reached. As a result, if the timer count value tw reaches the drive time initial value t11, the process proceeds to step S25, the blade support driving motor 44 is turned off, and the timer count tw is ended and reset. Thereby, the movement of the blade support 22 in the direction of the arrow A is stopped, and the blade portion 21 can be brought into contact with the portion 51 1 having a high ink absorption capability at the end of the ink absorber 51.

  Next, in steps S26 to S32, the guide rail 23 is lowered and the blade support 22 is moved to the home position side. In step S33, the timer count value tw is monitored, and if the driving time t11 is reached, the process proceeds to step S34. In steps S34 to S37, the guide rail 23 is raised and the blade support 22 is moved to the home position.

In step S38, the drive time t11 is incremented (added 1 second). That is, in the second time, the blade support 22 stops after 1 second from t11, and the stop position (51 2 ) moves to the right of the first stop position (51 1 ). Here, the moving speed of the blade support 22 is, for example, about 5 mm / s.

  Thereafter, in step S39, the wiping count w1 is incremented, and in step S40, the process proceeds to step S23 until the predetermined wiping count w is reached, and the processing operation described above is repeated. On the other hand, when the predetermined wiping count w is reached, the wiping operation ends.

Then, the position where the blade support 22 stops in contact with the ink absorber 51 is as follows. That is, the first time becomes a part 51 1 as shown in FIG. 9A. The second time, the first predetermined time stopping position of the blade support 22 than, in this case made by one second long, sites as shown in Figure 9B, before the site 51 1 (right) 51 Second , the blade support 22 stops. Similarly, as shown in FIG. 9C, 3 round the site 51 3 serving as a farther position than the second, the blade support 22 is stopped. Then, at the n-th time, the ink absorber 51 stops at the part 51 n that is the position reaching the other end (right end) of the ink absorber 51.

  As described above, in the second embodiment, the end of the ink absorber 51 on the side of the recording head 10 is in contact with the blade every time. However, since the stop position of the blade support 22 is different, the portion having a high ink absorption capability. The blade portion 21 can be brought into contact with the blade.

  Therefore, according to the second embodiment, when the cleaning operation of the blade portion 21 is performed, the blade always comes into contact with different parts (parts having high ink absorption capability) of the ink absorber 31. It becomes possible to maintain a good cleaning characteristic over a long period of time.

(Modification of the second embodiment)
Next, a modification of the second embodiment of the present invention will be described.

  12A to 12D are views for explaining the operation of the wiping mechanism of the ink jet recording apparatus in a modification of the second embodiment of the present invention.

  This modification is different from the second embodiment described above in that protrusions are formed on the blade support and the ink absorbed in the ink absorber is squeezed out.

  On the side of the blade support 22 facing the recording head 10 and the ink absorber 51, a protrusion 22a as an ink discharge member is formed behind the blade portion 21 with respect to the traveling direction of the blade support 22 during cleaning. Yes. When the protrusion 22a presses the ink absorber 51, the ink absorbed by the ink absorber 51 is squeezed out. The height of the protrusion 22a is set to a height at which the ink absorber 51 can be pressed and does not contact the lower surface of the nozzle plate 11.

  Furthermore, the wiping operation of this modification is the same as that of the flowchart of FIG.

  FIG. 12A is a schematic diagram showing a state in which the blade portion 21 moves in the direction of the arrow A shown in FIG. 12 and contacts one end (left end) of the lower surface of the ink absorber 51 of the cleaner 50. In this way, when the blade portion 21 abuts on the ink absorber 31, the ink held in the porous pores of the blade portion 21 is brought into the porous pores of the ink absorber 51 by capillary action. Can be communicated.

Then, the first position where the blade support 22 stops upon contact with the ink absorber 51 is a part 52 1 as shown in FIG. 12A, and the ink absorber from the blade part 21 at this position (part 52 1 ). Ink is transmitted to 51. The second time, since the stop position of the blade support 22 than the first is longer by a predetermined time, as shown in FIG. 12B, the portion 52 2 of the first (right) than to the region 52 1, blade support The body 22 stops. At this time, ink is transmitted from the blade portion 21 to the ink absorber 51 through the portion 52 2 , and the ink absorbed in the portion 52 1 of the ink absorber 51 is pressed and scraped out by the protrusion 22a. And flows into the blade support 22. 52 shown in the figure is ink recovered from the ink absorber 51 by the protrusion 22a.

Similarly, as shown in FIG. 12C, the third time portion 52 3 which is a farther position than the second, the blade support 22 is stopped, the ink absorbing member 51 from the blade portion 21 at a site 52 3 Ink is transmitted to. At the same time, the ink absorbed in the portions 52 1 and 52 2 of the ink absorber 51 is scraped out by the protrusion 22 a and flows into the blade support 22.

Then, as shown in FIG. 12D, at the n-th time, the ink absorber 51 stops at a part 51 n that reaches the other end (right end). At this time, the ink is transmitted from the blade portion 21 to the ink absorber 51 through the portion 52 n of the ink absorber 51, and the ink absorbed into the portions 52 1 to 52 n-1 is scraped out by the protrusion 22a. And flows into the blade support 22.

  Thereafter, the blade support 22 stops again at the first position shown in FIG. 12A, and thereafter, the above-described operation is repeated.

  In the second embodiment described above, the left side portion of the ink absorber is in contact with the blade many times each time cleaning is performed, so that the amount of ink absorbed is likely to be saturated, but according to this modification, the cleaning is performed. Since the ink in the ink absorbing body is scraped out every time, the ink is not saturated.

  In this modification, the protrusion is provided on the rear side of the blade support with respect to the traveling direction during cleaning, but may be provided on the front side.

(Third embodiment)
Next, a third embodiment of the present invention will be described.

  In the second embodiment described above, the blade portion is brought into contact with the cleaner immediately after the recording head is wiped. In this third embodiment, the blade portion is brought into contact with the cleaner after returning from the wiping of the recording head. I try to contact them. Further, the stop position of the blade portion is extended for each cleaning (sequentially shifted to the left).

  13A to 13D are diagrams for explaining the operation of the wiping mechanism of the ink jet recording apparatus according to the third embodiment of the present invention.

  In the third embodiment, the cleaner 60 includes an ink absorber 61 that is adjacent to the recording head 10 and disposed on the extension of the blade movement direction, and is in the direction of progress during cleaning. On the other hand, it is arranged behind the recording head 10. Further, the surface of the ink absorber 61 that contacts the blade portion 21 is disposed slightly lower than the lower surface of the nozzle plate 11.

  Next, the operation of wiping the nozzle blade 11 of the recording head 10 by the wiping mechanism configured as described above will be described with reference to FIGS. 13A to 13D, the operation explanatory diagrams of FIG. 15, and the flowchart of FIG.

  Note that steps S52 to S53, S55, S63, S65 to S68, and steps S72 to S73 in the flowchart of FIG. 14 are steps S2 to S3, S5, S12, S14 to S17, and step S18 of the flowchart of FIG. Since the same processing as in S19 is performed, the corresponding step number is referred to and the description thereof is omitted here.

  At the start of wiping, in step S51, as shown in FIG. 15, the initial drive time t21 of the blade support driving motor 44, the stop time t2 of the blade support 22 at the stopper 24b, the guide rail lifting motor 45 The driving time t3 and the number of times of wiping w1 are set. Note that t21 is set to a minimum value (MIN) that allows wiping while the blade portion 21 is in contact with the cleaner 60.

  Next, in step S52, the timer count values tw, ts, tg are reset, and the wiping count value w is reset. In the subsequent step S53, the blade support driving motor 44 is turned on, and the timer Counting (tw) is started. As a result, the blade support 22 starts to move in the direction indicated by the arrow A, and wiping is started.

  FIG. 13A is a schematic diagram illustrating a state in which the blade portion 21 is in contact with the home position of one end portion (right end) of the lower surface of the ink absorber 61 of the cleaner 60. In this way, when the blade portion 21 abuts on the ink absorber 61, the ink held in the porous pores of the blade portion 21 is brought into the porous pores of the ink absorber 61 by capillary action. Can be communicated.

  During wiping, in step S54, the timer count value tw is monitored to determine whether or not the driving time initial value t21 of the blade support driving motor 44 has been reached. As a result, if the timer count value tw reaches the drive time initial value t21, the process proceeds to step S55, where the blade support driving motor 44 is turned off, and the timer count tw is ended and reset.

  FIG. 13B is a schematic diagram showing a state in which the blade support 22 is brought into contact with the stopper 24b and the movement in the direction of the arrow A is stopped. Thus, the movement of the blade support 22 in the direction of arrow A is stopped.

  Next, in step S56, the guide rail raising / lowering motor 45 is turned on, and the guide rail 23 is lowered. As a result, although not shown, the guide rail 23 supporting the blade support 22 is lowered so as to move away from the recording head 10. In step S57, the timer count (tg) is started. Further, in step S58, the timer count value tg is monitored to determine whether or not the driving time t3 of the guide rail raising / lowering motor 45 has been reached. As a result, if the timer count value tg reaches the drive time t3, the process proceeds to step S59, where the guide rail elevating motor 45 is turned off, and the timer count tg ends and is reset. That is, the lowering of the guide rail 23 is stopped.

In step S60, the drive time initial value t21 is incremented (added 1 second). That is, by adding 1 second to t21, the return time (return movement amount) of the blade support 22 is increased. Accordingly, the stop position of the blade support 22 before the start of the second wiping is moved to the left side (61 2 ) of the first stop position (61 1 ) as shown in FIG. 13C.

  In consideration of the length of the ink absorber 61, the maximum value (MAX value) of the number of seconds in which the drive time initial value t21 can be incremented is taken into consideration. Therefore, in step S61, it is monitored whether the driving time initial value t21 reaches or exceeds the MAX value. As a result, when the drive time initial value t21 reaches or exceeds the MAX value, the process proceeds to step S62, and the drive time initial value t21 is returned to the initial value (MIN value). If the drive time initial value t21 is less than or equal to the MAX value in step S61, step S62 is skipped.

  Next, in step S63, the blade support driving motor 44 is turned on to be driven in the reverse direction, and the timer count tw is started. As a result, the blade support 22 starts to move toward the cleaner 60 side. In subsequent step S64, the timer count value tw is monitored to determine whether or not the driving time initial value t21 of the blade support driving motor 44 has been reached. As a result, if the timer count value tw reaches the drive time initial value t21, the process proceeds to step S65.

In steps S65 to S68, the guide rail 23 is raised, and the blade support 22 is positioned at the second stop position (61 2 ) of the ink absorber 61 as shown in FIG. 13C. Here, in order to stop the blade portion 21 in a state where it is in contact with the ink absorber 61, the stop time count ts is started in step S69. By simply stopping the stop time t2, the ink absorbed in the blade portion 21 is transmitted to a predetermined portion 61 2 of the ink absorber 61.

  In step S70, when the timer count value ts is monitored and the stop time t2 of the blade support 22 is reached, the process proceeds to step S71, where the timer count ts is ended and reset.

  Thereafter, in step S72, the wiping count w1 is incremented, and in step S73, it is determined whether or not the predetermined wiping count w has been reached. If the predetermined wiping count w has not yet been reached, the process proceeds to step S3 and the above-described processing operation is repeated. On the other hand, if the predetermined number of wiping times w is reached in step S73, the process proceeds to step S74.

FIG. 13D is a schematic diagram illustrating a state in which the blade portion 21 is in contact with the other end portion (left end) of the lower surface of the ink absorber 61 of the cleaner 60. That is, the blade support 22 is stopped at the n-th stop position (61 n ) that has reached the predetermined number of wiping operations w.

  In step S74, the drive time initial value t21 is set to an initial value so that the blade support 22 is returned to the home position in FIG. 13A. Thereafter, this sequence ends.

  As described above, in the third embodiment, the stop position of the blade support 22 is extended for each cleaning (sequentially shifted to the left), and the first contact position on the cleaner is the position closest to the recording head, In other words, the right end of the cleaner. Therefore, although the blade portion comes into contact with the recording head side end portion of the ink absorber every time, the blade portion can be brought into contact with a portion having a high ink absorption capability due to a different stop position.

(Modification of the third embodiment)
Next, a modification of the third embodiment of the present invention will be described.

  In the above-described third embodiment, after returning from the wiping of the recording head, the blade portion is brought into contact with the cleaner, and the stop position of the blade portion is extended for each cleaning (sequentially shifted to the left). However, it is not limited to this. In this side zero example, the stop position of the blade is shortened for each cleaning (sequentially shifted to the right).

  16A to 16D are views for explaining the operation of the wiping mechanism in a modification of the third embodiment of the present invention. The configuration of the wiping mechanism shown in FIGS. 16A to 16D is the same as the configuration of the wiping mechanism shown in FIGS. 13A to 13D except for the position where the blade support 22 is stopped.

  The operation of wiping the nozzle blade 11 of the recording head 10 by the wiping mechanism configured as described above will be described with reference to the operation explanatory diagrams of FIGS. 16A to 16D and FIG. 18 and the flowchart of FIG.

  Note that steps S82 to S83, S85 to S89, S93, and S95 to S103 in the flowchart of FIG. 17 are the same as steps S52 to S53, S55 to S59, S63, and steps S65 to S73 of the flowchart of FIG. Therefore, the description will be omitted here with reference to the corresponding step numbers.

  At the start of wiping, in step S81, the initial drive time t31 of the blade support motor 44, the stop time t2 of the blade support 22 at the stopper 24b, the drive time t3 of the guide rail lifting motor 45, and the number of wiping times w1. Are set respectively. Note that t31 is set to a maximum value (MAX) that allows wiping while the blade portion 21 is in contact with the cleaner 60.

  Next, in step S82, the timer count values tw, ts, and tg are reset, and the wiping count value w is reset. In step S83, the blade support driving motor 44 is turned on, and the timer Counting (tw) is started. As a result, the blade support 22 starts to move in the direction indicated by the arrow A, and wiping is started.

FIG. 16A is a schematic diagram illustrating a state in which the blade portion 21 is in contact with the home position of one end portion (left end) of the lower surface of the ink absorber 61 of the cleaner 60. In this manner, the blade portion 21 abuts against the ink absorbing member 61 at the home position (see blade support 22 1 in FIG. 18), by capillary action, it has been faced in the pores of the porous of the blade portion 21 Ink can be transferred into the porous pores of the ink absorber 61.

  Further, during wiping, in step S84, the timer count value tw is monitored to determine whether or not the driving time initial value t31 of the blade support driving motor 44 has been reached. As a result, when the timer count value tw reaches the drive time initial value t31, the process proceeds to step S85, the blade support driving motor 44 is turned off, and the timer count tw is ended and reset.

FIG. 16B is a schematic diagram showing a state in which the blade support 22 is brought into contact with the stopper 24b and the movement in the direction of the arrow A is stopped. Thus, the movement of the blade support 22 in the direction of arrow A is stopped (see the blade support 22 2 in FIG. 18).

Next, in steps S86 to S89, the guide rail raising / lowering motor 45 is turned on, and the guide rail 23 is lowered in the direction of arrow B in FIG. Thus, the guide rail 23 which supports the blade support 22, (see blade support 22 3 of FIG. 18) which descends to be away from the recording head 10.

In step S90, the drive time initial value t31 is decremented (decrease by 1 second). That is, by subtracting 1 second from t31, the return time (return movement amount) of the blade support 22 is reduced. Accordingly, the stop position of the blade support 22 before the start of the second wiping is moved to the right side (61 2 ′) of the first stop position (61 1 ′) as shown in FIG. 16C. (See blade support 22 4 , 22 5 in FIG. 18).

  In consideration of the length of the ink absorber 61, the minimum value (MIN value) of the number of seconds in which the drive time initial value t31 can be decremented is taken into consideration. Therefore, in step S91, it is monitored whether the drive time initial value t31 reaches the MIN value or becomes smaller. As a result, when the drive time initial value t31 reaches the MIN value or becomes smaller, the process proceeds to step S92, and the drive time initial value t31 is returned to the initial value (MAX value). If the drive time initial value t31 is smaller than the MIN value in step S91, step S92 is skipped.

  Next, in step S93, the blade support driving motor 44 is turned on to be driven in the reverse direction, and the timer count tw is started. As a result, the blade support 22 starts to move in the direction of arrow C in FIG. In subsequent step S94, the timer count value tw is monitored to determine whether or not the driving time initial value t31 of the blade support driving motor 44 has been reached. As a result, if the timer count value tw reaches the drive time initial value t31, the process proceeds to step S95.

In steps S95 to S103, the blade support 22 is moved in the directions indicated by arrows C and D in FIG. 18, and the blade support 22 is positioned at the second stop position (61 2 ′) of the ink absorber 61. That is, the blade support 22 is shifted from the stop position of the blade support 22 4 in FIG. 18 to the stop position of the blade support 22 5 as indicated by the arrow 65. Thereafter, when the predetermined number of wiping times w is reached, the process proceeds to step S104.

FIG. 16D is a schematic diagram illustrating a state in which the blade portion 21 is in contact with the other end portion (right end) of the lower surface of the ink absorber 61 of the cleaner 60. That is, the blade support 22 is stopped at the n-th stop position (61 n ′) that has reached the predetermined wiping count w.

  In step S104, the drive time initial value t31 is set to an initial value so that the blade support 22 is returned to the home position in FIG. 16A. Thereafter, this sequence ends.

  As described above, in the modified example of the third embodiment, the stop position of the blade support 22 is shortened (sequentially shifted to the right) for each cleaning, and the initial contact position to the cleaner is determined from the recording head. The farthest position, that is, the left edge of the cleaner. Therefore, although the blade portion comes into contact with the recording head side end portion of the ink absorber every time, the blade portion can be brought into contact with a portion having a high ink absorption capability due to a different stop position.

(Fourth embodiment)
Next, a fourth embodiment of the present invention will be described.

  In the fourth embodiment, as in the second embodiment described above, the cleaner is disposed adjacent to the recording head and on the front side in the advancing direction during the cleaning of the blade support. The absorber is moved by the blade support.

  19A to 19D are views for explaining the operation of the wiping mechanism of the ink jet recording apparatus according to the fourth embodiment of the present invention.

  In the fourth embodiment, the cleaner 70 includes an ink absorber 71 that is adjacent to the recording head 10 and disposed on an extension in the blade movement direction. The ink absorber 71 has, for example, a rectangular shape, and at least the surface in contact with the blade portion 21 is substantially equal to the lower surface of the nozzle plate 11 at a portion on the side close to the recording head 10, and the one portion at the other portion. An inclination is provided so as to be lower than the portion. Further, the cleaner 70 is configured to be raised / lowered by a latch mechanism that can move stepwise along the vertical direction with respect to the nozzle plate 11.

  Further, on the side of the blade support 22 facing the recording head 10 and the ink absorber 71, a protrusion 22b is formed in front of the blade portion 21 with respect to the traveling direction of the blade support 22 during cleaning. As will be described later, the protrusion 22b presses the ink absorber 71 and pushes it upward to change the height of the ink absorber 71. Note that the height of the protrusion 22b is set so that the ink absorber 71 can be pushed up and does not contact the lower surface of the nozzle plate 11.

  20A to 20J are views for explaining the configuration and operation of the latch mechanism.

  The latch mechanism 100 is an absorber support member 75 that is an instruction means for raising / lowering the ink absorber 71 of the cleaner 70, a rotation shaft 76 that rotates when the latch is released, and a rotation about the rotation shaft 76. A latch member 77, a stopper member 78 attached to the latch member 77, a biasing member 79 such as a spring for pressing the latch member 77 against the stopper member 78, and a case where the latch member 77 escapes in the lateral direction. Rotating slide support 81 serving as a movement guide, upper and lower slide supports 82a and 82b serving as movement guides in the vertical direction of the absorber support member 75, and a pressing member 85 attached to the blade support 22. Configured.

  Next, an operation of wiping the nozzle blade 11 of the recording head 10 by the wiping mechanism configured as described above will be described with reference to FIGS. 19A to 19D and FIGS. 20A to 20J.

  In FIG. 19A, the wiping of the nozzle plate is finished, the protrusion 22b provided on the blade support 22 abuts against the cleaner 30, and the blade support 22 is stopped at one end (left end) of the ink absorber 71. It is the figure which showed the state.

In this case, at the first stop position (part 71 1 ), while the ink absorber 71 is in close contact with the blade portion 21 of the blade support 22, the ink adhering to or absorbed by the blade portion 21 is absorbed. To do. At this time, the protrusion 22b presses the ink absorber 71, whereby the ink absorbed by the ink absorber 71 is squeezed out. At the same time, the protrusion 22b is pressed against the ink absorber 71, whereby the ink absorber 71 moves upward.

  That is, as shown in FIG. 20A, the wiping of the recording head 10 is completed, and the blade portion 21 hits the ink absorber 71. The ink absorber 71 is attached to an absorber support member 75, and the absorber support member 75 is movable in the vertical direction. The position of the absorber support member 75 is fixed by the weight of the absorber support member 75 and the latch by the latch member 77 being placed on the stopper member 78.

  20B, the absorber support member 75 of the ink absorber 71 is lifted upward (in the direction of arrow E in the figure) by the force with which the blade portion 21 of the blade support 22 hits the ink absorber 71. At this time, the latch member 77 rotates around the rotation shaft 76 in the direction of the arrow F, so that the stopper member 78 gets over the latch. Then, the stopper member 78 moves relatively downward in the latch member 77.

  Next, as shown in FIG. 20C, when the stopper member 78 finishes over the latch, the latch member 77 rotates in the direction of the arrow G in the drawing and is latched again. Then, the absorber support member 75 moves upward and is fixed at that position.

  Thereafter, as shown in FIG. 20D, the blade support 22 is lowered in the direction of the arrow H in the drawing. Although not shown here, the blade support 22 returns to the wipe start position (home position) again and prepares for the next wipe. Then, from the same home position as in FIG. 1 or FIG. 4A, the blade support 22 moves along the guide rail 23 by driving the blade support driving motor 44.

Thus, when the wiping operation by the blade portion 21 is performed again, the blade support 22 abuts against the ink absorber 71 as shown in FIG. 20E. At this time, since the position of the ink absorber 71 is higher than the previous time (first time), the ink absorber 71 hits the ink absorber 71 by increasing the wipe operation distance. That is, the blade support 22 is stopped on the right side in the second time, a position different from the first time. As shown in FIG. 19B, the second stop position is near the stop position of the first protrusion 22b. Then, when the blade portion 21 abuts on the right portion 71 2 of the first portion 71 1 , the ink held in the porous pores of the blade portion 21 is removed from the porous portion of the ink absorber 71. It can be transmitted into the pores.

  At this time, as shown in FIG. 20F, the absorber support member 75 of the ink absorber 71 is lifted upward (in the direction of arrow E in the drawing) by the force with which the blade support 22 strikes the ink absorber 71 again. Then, the latch member 77 rotates around the rotation shaft 76, so that the stopper member 78 gets over the latch. Then, the stopper member 78 moves relatively downward in the latch member 77.

Thereafter, the above-described latch operation is repeated for each wipe, and the abutting position of the blade support 22 against the ink absorber 71 is moved for each wipe. For example, as shown in FIG. 19C, 3 round the site 71 3 serving as a farther position than the second (right), the blade support 22 is stopped.

Then, as shown in FIG. 19D, when the blade support 22 stops at the portion 71 n that reaches the other end (right end) of the ink absorber 71 at the n-th time, as shown in FIG. 20G. The latch is also used up, and no more can be lifted. As described above, when the blade support 22 reaches the position where the latch is used up, the pressing member 85 attached to the blade support 22 abuts against the latch member 77. When the pressing member 85 pushes the latch member 77, as shown in FIG. 20H, the latch member 77 rotates about the rotation shaft 76 in the direction of the arrow F in the figure, and the latch is released.

  When the latch is released here, the blade support 22 is lowered. At this time, since the latch is released, the entire absorber support member 75 is lowered as shown in FIG. 20I. Then, as shown in FIG. 20J, when the blade support 22 is further lowered, the pressing member 85 is detached from the latch member 77. Thereby, the latch and the stopper member 78 are engaged again.

  The blade support 22 is returned to the home position by driving the blade support drive motor 44 and the guide rail lifting / lowering motor 45. Thereafter, when wiping is started again, as shown in FIGS. 19A and 20A, the blade support 22 pushes up the ink absorber 71 at the first stop position, and the above-described operation is repeated thereafter.

  Thus, according to the fourth embodiment, the protrusion 22b is formed on the blade support 22 and the ink absorber 71 is pressed to move the ink absorber 71 upward. The contact surface becomes a new place every time, and does not hit the place where it contacted last time. Therefore, when performing the cleaning operation of the blade portion 21, the blade always abuts against different parts of the ink absorber 71 (parts having high ink absorption capability), so that good cleaning characteristics are maintained for a long period of time. It becomes possible to do.

(Fifth embodiment)
Next, a fifth embodiment of the present invention will be described.

  In the fifth embodiment, contrary to the above-described fourth embodiment, the cleaner is disposed adjacent to the recording head and on the rear side in the traveling direction during cleaning of the blade support, and further the ink of the cleaner. The absorber is moved by the blade support.

  21A to 21D are diagrams for explaining the operation of the wiping mechanism of the ink jet recording apparatus according to the fifth embodiment of the present invention.

  In the fifth embodiment, the cleaner 90 includes an ink absorber 91 that is adjacent to the recording head 10 and disposed on an extension in the blade movement direction. The ink absorber 91 has, for example, a rectangular shape, and at least the surface in contact with the blade portion 21 is substantially equal to the lower surface of the nozzle plate 11 at a portion close to the recording head 10, and the one portion at the other portion. An inclination is provided so as to be lower than the portion. Further, the cleaner 90 is configured to be raised / lowered by a latch mechanism that can move stepwise along the vertical direction with respect to the nozzle plate 11. However, the configuration and operation of the latch mechanism are the same as those in the fourth embodiment described above, and therefore illustration and description thereof are omitted here.

  Further, on the side of the blade support 22 facing the recording head 10 and the ink absorber 91, a protrusion 22a is formed behind the blade portion 21 with respect to the traveling direction of the blade support 22 during cleaning. As will be described later, the protrusion 22a presses the ink absorber 91 and pushes it upward to change the height of the ink absorber 91. Note that the height of the protrusion 22a is a height that can push up the ink absorber 91 and does not contact the lower surface of the nozzle plate 11.

  Next, the operation of the wiping mechanism configured as described above will be described.

  In FIG. 21A, after the wiping of the nozzle plate is completed (first time), the protrusion 22a provided on the blade support 22 abuts the cleaner 90, and the blade support 22 is attached to one end (right side) of the ink absorber 91. It is the figure which showed the state by which was stopped.

In this case, at the first stop position (part 91 1 ), while the ink absorber 91 is in close contact with the blade portion 21 of the blade support 22, the ink adhering to or absorbed by the blade portion 21 is absorbed. To do. At this time, when the protrusion 22a is pressed against the ink absorber 91, the ink absorber 91 moves upward (in the direction of arrow E in the figure) by a latch mechanism (not shown). At the same time, the protrusion 22a presses the ink absorber 91, so that the ink absorbed by the ink absorber 91 during the previous cleaning is squeezed out.

  Thereafter, the blade support 22 is moved along the guide rail 23 by the drive of the blade support drive motor 44, and wiping on the surface of the nozzle plate 11 is executed. Further, by driving the guide rail raising / lowering motor 45 and the blade support driving motor 44, the blade support 22 is positioned at the second stop position as shown in FIG. 21B.

The second stop position (part 91 2 ) is a position different from the first stop position (part 91 1 ) shown in FIG. 21A, in this case, the left side. As shown in FIG. 21B, the second stop position is near the stop position of the first protrusion 22a. Then, when the blade portion 21 abuts on the left portion 91 2 of the first portion 91 1 , the ink held in the porous pores of the blade portion 21 is removed from the porous portion of the ink absorber 91. It can be transmitted into the pores. At this time, the ink absorber 91 slightly moves upward by the force of the blade support 22 hitting the ink absorber 91 and a latch mechanism (not shown).

Thereafter, in the same manner as described above, wiping on the surface of the nozzle plate 11 is executed by driving the blade support driving motor 44. Further, by driving the guide rail raising / lowering motor 45 and the blade support driving motor 44, the blade support 22 is positioned at the third stop position (part 91 3 ) as shown in FIG. 21C. .

Then, as shown in FIG. 21D, when the blade support 22 stops at the portion 91 n that reaches the other end (left side) of the ink absorber 91 at the n-th time, the ink absorber 91 It will be in the state which does not rise above. Then, after the blade support 22 is moved in the direction of the arrow A by executing wiping on the surface of the nozzle plate 11, the latch is released by a latch mechanism (not shown), and the ink absorber is lowered (in the direction of arrow E '). Return to the original position.

  Thereafter, the blade support 22 is returned to the home position shown in FIG. 21A by driving the blade support drive motor 44 and the guide rail lifting / lowering motor 45. Thereafter, the above-described operation is repeated.

  Thus, according to the fifth embodiment, by forming the protrusion 22a on the blade support 22 and pressing the ink absorber 91, the ink absorber 91 moves upward. The return position is slightly different for each wipe, and the contact surface of the blade portion 21 becomes a new place every time, so that it does not hit the place where it contacted last time. Accordingly, when performing the cleaning operation of the blade portion 21, the blade always abuts against different parts (parts having a high ink absorption capacity) of the ink absorber 91, so that good cleaning characteristics are maintained over a long period of time. It becomes possible to do.

  While the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention.

  Further, the above-described embodiments include inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, even if some constituent requirements are deleted from all the constituent requirements shown in the embodiment, the problem described in the column of the problem to be solved by the invention can be solved, and the effect described in the column of the effect of the invention Can be extracted as an invention.

2 is a schematic view of the schematic configuration of the recording head 10, the wiping mechanism 20, and the cleaner 30 in the inkjet recording apparatus 1 according to the first embodiment of the present invention as viewed from the side. FIG. It is a perspective view of the cleaner 30 of FIG. FIG. 2 is a block diagram illustrating only a control system related to cleaning of a wiper blade in the ink jet recording apparatus of FIG. 1. FIG. 6 is a schematic diagram illustrating a state immediately before starting wiping, for explaining a wiping operation of the ink jet recording apparatus according to the first embodiment of the present invention. FIG. 2 is a diagram schematically illustrating a state of the wiping mechanism 20 and the recording head 10 during wiping for explaining the wiping operation of the ink jet recording apparatus according to the first embodiment of the present invention. FIG. 2 is a diagram for explaining a wiping operation of the ink jet recording apparatus according to the first embodiment of the present invention, in which wiping on the surface of the nozzle plate 11 is completed, and the blade portion 21 is positioned between the recording head 10 and the cleaner 30. It is the schematic diagram which showed the state currently carried out. FIG. 3 is a diagram for explaining the wiping operation of the ink jet recording apparatus according to the first embodiment of the present invention, in which the blade portion 21 comes into contact with the ink absorber 31 of the cleaner 30, the blade portion 21 is curved, and the illustrated arrow It is a schematic diagram which shows the state which is going to move toward A direction. FIG. 2 is a diagram for explaining a wiping operation of the ink jet recording apparatus according to the first embodiment of the present invention, and is a schematic diagram showing a state in which the blade support 22 is brought into contact with the stopper 24b and the movement in the direction indicated by the arrow A is stopped. FIG. FIG. 2 is a diagram for explaining a wiping operation of the ink jet recording apparatus according to the first embodiment of the present invention, and illustrates a guide rail 23 supporting a blade support body 22 in the direction indicated by an arrow B so as to move away from the recording head 10. FIG. 6 is a schematic diagram illustrating a state in which the blade portion 21 is moved away from the ink absorber 31. FIG. 2 is a diagram for explaining a wiping operation of the ink jet recording apparatus according to the first embodiment of the present invention, in which the blade support 22 is moved in the direction indicated by an arrow C in order to return to the home position on the guide rail 23. It is a schematic diagram which shows the state which exists. FIG. 3 is a diagram for explaining a wiping operation of the ink jet recording apparatus according to the first embodiment of the present invention, and after the second wiping operation, the blade portion 21 comes into contact with the ink absorber 31 of the cleaner 30 and the blade portion 21 is curved. And it is a schematic diagram which shows the state which is going to move further toward the illustration arrow A direction. 3 is a flowchart for explaining a wiping operation of the ink jet recording apparatus according to the first embodiment of the present invention. FIG. 5 is a diagram for explaining a wiping operation of the ink jet recording apparatus according to the first embodiment of the present invention. FIG. 2 is a diagram for explaining a wiping operation of the ink jet recording apparatus according to the first embodiment of the present invention, and a portion 31 1 , 31 2 that absorbs ink in an ink absorber 31 and a blade portion 21 are in contact with each other. It is the figure which showed the example of the ranges 35 1 and 35 2 . FIG. 9 is a schematic diagram illustrating a state immediately before starting wiping, for explaining the operation of the wiping mechanism in a modification of the first embodiment of the present invention. FIG. 5 is a schematic diagram illustrating the state of the wiping mechanism 20 and the recording head 10 during wiping, for explaining the operation of the wiping mechanism in a modification of the first embodiment of the present invention. FIG. 5 is a diagram for explaining the operation of the wiping mechanism in the modification of the first embodiment of the present invention. The state of the blade support 22 immediately before contacting the cleaner 30 after the wiping of the nozzle plate is completed. It is the shown schematic diagram. In order to explain the operation of the wiping mechanism in the modified example of the first embodiment of the present invention, the blade support 22 abuts on the cleaner 30 and the blade support 22 moves in the A direction. It is the schematic diagram which showed that it is moving. FIG. 7 is a diagram for explaining the operation of the wiping mechanism of the ink jet recording apparatus according to the second embodiment of the present invention, in which the blade portion 21 moves in the direction of the arrow A in FIG. It is a schematic diagram which shows the state contact | abutted at the one end part (left end) of the lower surface of 50 ink absorbers 51. FIG. FIG. 9 is a diagram for explaining the operation of the wiping mechanism of the ink jet recording apparatus according to the second embodiment of the present invention, in which the blade portion 21 moves in the direction of the arrow A in the drawing and is a second stop position. It is a schematic diagram which shows the state contact | abutted to the lower surface of 50 ink absorbers 51. FIG. FIG. 7 is a diagram for explaining the operation of the wiping mechanism of the ink jet recording apparatus according to the second embodiment of the present invention, in which the blade portion 21 moves in the direction of the arrow A shown in FIG. It is a schematic diagram which shows the state contact | abutted to the lower surface of 50 ink absorbers 51. FIG. FIG. 9 is a diagram for explaining the operation of the wiping mechanism of the ink jet recording apparatus according to the second embodiment of the present invention, in which the blade portion 21 moves in the direction of the arrow A in FIG. It is a schematic diagram which shows the state contact | abutted to the lower surface of 50 ink absorbers 51. FIG. 6 is a flowchart for explaining a wiping operation of an ink jet recording apparatus according to a second embodiment of the present invention. It is a figure for demonstrating the operation | movement of wiping of the inkjet recording device which concerns on the 2nd Embodiment of this invention. FIG. 9 is a view for explaining the operation of the wiping mechanism of the ink jet recording apparatus in a modification of the second embodiment of the present invention, in which the blade portion 21 moves in the direction of the arrow A in the drawing, and the first stop position It is a schematic diagram which shows the state which contact | abutted to the one end part (left end) of the lower surface of the ink absorber 51 of the cleaner 50 which is. FIG. 9 is a view for explaining the operation of the wiping mechanism of the ink jet recording apparatus in a modification of the second embodiment of the present invention, in which the blade portion 21 moves in the direction of the arrow A in FIG. FIG. 6 is a schematic diagram showing a state where the ink absorber 51 is in contact with the lower surface of the cleaner 50. FIG. 9 is a view for explaining the operation of the wiping mechanism of the ink jet recording apparatus in a modification of the second embodiment of the present invention, in which the blade portion 21 moves in the direction of the arrow A shown in FIG. FIG. 6 is a schematic diagram showing a state where the ink absorber 51 is in contact with the lower surface of the cleaner 50. FIG. 9 is a diagram for explaining the operation of the wiping mechanism of the ink jet recording apparatus in a modification of the second embodiment of the present invention, in which the blade portion 21 moves in the direction of the arrow A and the nth stop position FIG. 6 is a schematic diagram showing a state where the ink absorber 51 is in contact with the lower surface of the cleaner 50. This is for explaining the operation of the wiping mechanism of the ink jet recording apparatus according to the third embodiment of the present invention. The blade portion 21 is a home position of one end portion (right end) of the lower surface of the ink absorber 61 of the cleaner 60. It is a schematic diagram which shows the state contact | abutted by. FIG. 9 is a view for explaining the operation of the wiping mechanism of the ink jet recording apparatus according to the third embodiment of the present invention, in which the blade support 22 is brought into contact with the stopper 24b and the movement in the direction indicated by the arrow A is stopped. It is a schematic diagram which shows. In order to explain the operation of the wiping mechanism of the ink jet recording apparatus according to the third embodiment of the present invention, the blade support 22 is positioned at the second stop position (61 2 ) of the ink absorber 61. It is a schematic diagram which shows a state. This is for explaining the operation of the wiping mechanism of the ink jet recording apparatus according to the third embodiment of the present invention. The blade portion 21 is applied at the other end (left end) of the lower surface of the ink absorber 61 of the cleaner 60. It is a schematic diagram which shows the state which contact | connected. 10 is a flowchart for explaining a wiping operation of an ink jet recording apparatus according to a third embodiment of the present invention. It is a figure for demonstrating the operation | movement of wiping of the inkjet recording device which concerns on the 3rd Embodiment of this invention. This is for explaining the operation of the wiping mechanism of the ink jet recording apparatus in the modification of the third embodiment of the present invention. The blade portion 21 is one end (left end) of the lower surface of the ink absorber 61 of the cleaner 60. It is a schematic diagram which shows the state contact | abutted in the home position. FIG. 9 is a view for explaining the operation of the wiping mechanism of the ink jet recording apparatus according to a modification of the third embodiment of the present invention, in which the blade support 22 is brought into contact with the stopper 24b and the movement in the direction of the arrow A is stopped. It is a schematic diagram which shows the state made. FIG. 9 is a diagram for explaining the operation of the wiping mechanism of the ink jet recording apparatus according to a modification of the third embodiment of the present invention, where the blade support 22 is the second stop position (61 2 ′) of the ink absorber 61. It is a schematic diagram which shows the state positioned by. FIG. 10 is a view for explaining the operation of the wiping mechanism of the ink jet recording apparatus according to a modification of the third embodiment of the present invention, in which the blade portion 21 is connected to the other end portion (right end) of the lower surface of the ink absorber 61 of the cleaner 60. It is a schematic diagram which shows the state contact | abutted in (). It is a flowchart for demonstrating the wiping operation | movement of the inkjet recording device which concerns on the modification of the 3rd Embodiment of this invention. It is a figure for demonstrating the wiping operation | movement of the inkjet recording device which concerns on the modification of the 3rd Embodiment of this invention. This is for explaining the operation of the wiping mechanism of the ink jet recording apparatus according to the fourth embodiment of the present invention. After the wiping of the nozzle plate is finished, the protrusion 22b provided on the blade support 22 is formed on the cleaner 30. FIG. 6 is a view showing a state where the blade support 22 is stopped at one end (left end) of the ink absorber 71 in contact. FIG. 9 is a diagram for explaining the operation of the wiping mechanism of the ink jet recording apparatus according to the fourth embodiment of the present invention, in which the blade portion 21 moves in the direction of the arrow A in the drawing and is a second stop position. FIG. 7 is a schematic diagram illustrating a state in which the ink absorbing member 71 contacts the lower surface of 70. FIG. 9 is a diagram for explaining the operation of the wiping mechanism of the ink jet recording apparatus according to the fourth embodiment of the present invention, in which the blade portion 21 moves in the direction of the arrow A in the drawing and is a third stop position. FIG. 7 is a schematic diagram illustrating a state in which the ink absorbing member 71 contacts the lower surface of 70. This is for explaining the operation of the wiping mechanism of the ink jet recording apparatus according to the fourth embodiment of the present invention, in which the blade portion 21 moves in the direction of the arrow A in the drawing and absorbs ink at the nth stop position. blade support 22 to the site 71 n to be ended up position to the other end (right end) of the body 71 is a schematic view showing a state where the stop. FIG. 10 is a diagram for explaining the operation of a wiping mechanism of an ink jet recording apparatus according to a fourth embodiment of the present invention, and for explaining the configuration and operation of a latch mechanism that raises / lowers a cleaner. FIG. 10 is a diagram for explaining the operation of a wiping mechanism of an ink jet recording apparatus according to a fourth embodiment of the present invention, and for explaining the configuration and operation of a latch mechanism that raises / lowers a cleaner. FIG. 10 is a diagram for explaining the operation of a wiping mechanism of an ink jet recording apparatus according to a fourth embodiment of the present invention, and for explaining the configuration and operation of a latch mechanism that raises / lowers a cleaner. FIG. 10 is a diagram for explaining the operation of a wiping mechanism of an ink jet recording apparatus according to a fourth embodiment of the present invention, and for explaining the configuration and operation of a latch mechanism that raises / lowers a cleaner. FIG. 10 is a diagram for explaining the operation of a wiping mechanism of an ink jet recording apparatus according to a fourth embodiment of the present invention, and for explaining the configuration and operation of a latch mechanism that raises / lowers a cleaner. FIG. 10 is a diagram for explaining the operation of a wiping mechanism of an ink jet recording apparatus according to a fourth embodiment of the present invention, and for explaining the configuration and operation of a latch mechanism that raises / lowers a cleaner. FIG. 10 is a diagram for explaining the operation of a wiping mechanism of an ink jet recording apparatus according to a fourth embodiment of the present invention, and for explaining the configuration and operation of a latch mechanism that raises / lowers a cleaner. FIG. 10 is a diagram for explaining the operation of a wiping mechanism of an ink jet recording apparatus according to a fourth embodiment of the present invention, and for explaining the configuration and operation of a latch mechanism that raises / lowers a cleaner. FIG. 10 is a diagram for explaining the operation of a wiping mechanism of an ink jet recording apparatus according to a fourth embodiment of the present invention, and for explaining the configuration and operation of a latch mechanism that raises / lowers a cleaner. FIG. 10 is a diagram for explaining the operation of a wiping mechanism of an ink jet recording apparatus according to a fourth embodiment of the present invention, and for explaining the configuration and operation of a latch mechanism that raises / lowers a cleaner. This is for explaining the operation of the wiping mechanism of the ink jet recording apparatus according to the fifth embodiment of the present invention. After the wiping of the nozzle plate is completed (first time), the protrusion 22a provided on the blade support 22 Is a view showing a state in which the blade support 22 is stopped at one end (right side) of the ink absorber 91 in contact with the cleaner 90. In order to explain the operation of the wiping mechanism of the ink jet recording apparatus in the fifth embodiment of the present invention, the blade support 22 is positioned at the second stop position (91 2 ) of the ink absorber 91. It is a schematic diagram which shows a state. In order to explain the operation of the wiping mechanism of the ink jet recording apparatus according to the fifth embodiment of the present invention, the blade support 22 is positioned at the third stop position (91 3 ) of the ink absorber 91. It is a schematic diagram which shows a state. This is for explaining the operation of the wiping mechanism of the ink jet recording apparatus according to the fifth embodiment of the present invention, and is a position where the other end (left side) of the ink absorber 91 is reached at the nth stop position. blade support 22 to the site 91 n comprised is a schematic view showing a state of stopping.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Inkjet recording device, 10 ... Recording head, 11 ... Nozzle plate, 13 ... Purge droplet, 20 ... Wiping mechanism, 21 ... Blade part, 22 ... Blade support, 22a, 22b ... Projection, 23 ... Guide rail, 24a , 24b ... stopper, 30 ... cleaner, 31 ... ink absorber, 32 ... shaft, 33 ... bearing, 40 ... control unit, 41 ... counter, 44 ... blade support drive motor, 45 ... guide rail lifting motor.

Claims (13)

  1. In an inkjet recording apparatus that records an image by discharging ink toward a recording medium from a nozzle provided on a nozzle plate of a recording head,
    A blade for wiping off ink adhering to the nozzle plate of the recording head;
    First driving means for moving the blade within a predetermined range along the longitudinal direction of the recording head;
    A cleaner installed so as to be in contact with the blade, and a cleaner that sucks ink adhering to the blade by contacting the blade;
    The first drive means is controlled to change the portion of the cleaner where the blade abuts each time the blade abuts the cleaner, and the blade abutment and stop position with respect to the cleaner each time cleaning is performed. Cleaning position changing means for shifting to,
    An ink jet recording apparatus comprising:
  2. The cleaner is pivotally supported around an axis orthogonal to the moving direction of the blade,
    The cleaning position changing means moves the blade to press against the cleaner, and rotates the cleaner with the pressing force.
    The inkjet recording apparatus according to claim 1.
  3.   The ink jet recording apparatus according to claim 2, wherein the cleaner is installed downstream of the recording head in a direction in which the blade wipes a nozzle plate of the recording head.
  4.   2. The ink jet recording apparatus according to claim 1, wherein the cleaner is installed downstream of the recording head in a direction in which the blade wipes a nozzle plate of the recording head.
  5.   5. The ink jet recording apparatus according to claim 4, wherein the cleaning position changing unit moves the stop position of the blade with respect to the cleaner away from the recording head for each cleaning.
  6. An ink discharging member that is capable of contacting the cleaner, squeezes out the ink absorbed in the cleaner by contacting the cleaner, and discharges the ink out of the cleaner;
    The first driving means moves the ink discharge member together with the blade;
    The inkjet recording apparatus according to claim 4.
  7. The cleaner is configured such that the contact surface with the blade is inclined such that the side closer to the recording head is higher and the side farther is lower, and can be moved stepwise along the vertical direction with respect to the nozzle plate. Comprising a latch mechanism
    The cleaning position changing means controls the first driving means, and pushes the blade against the cleaner to push up and latch the cleaner;
    The inkjet recording apparatus according to claim 5.
  8.   The inkjet recording apparatus according to claim 1, wherein the cleaner is installed upstream of the recording head in a direction in which the blade wipes a nozzle plate of the recording head.
  9. A second driving means for moving the blade within a predetermined range along a direction perpendicular to the nozzle plate of the recording head;
    The cleaning position changing means controls the second driving means and defines the stop position of the blade by bringing the blade into contact with the cleaner;
    The ink jet recording apparatus according to claim 8.
  10.   The inkjet recording apparatus according to claim 9, wherein the cleaning position changing unit controls the first driving unit to move the stop position of the blade with respect to the cleaner away from the recording head for each cleaning.
  11.   The inkjet recording apparatus according to claim 9, wherein the cleaning position changing unit controls the first driving unit to bring the stop position of the blade with respect to the cleaner closer to the recording head for each cleaning.
  12. The cleaner is configured such that the contact surface with the blade is inclined such that the side closer to the recording head is higher and the side farther is lower, and can be moved stepwise along the vertical direction with respect to the nozzle plate. Comprising a latch mechanism
    The cleaning position changing means pushes up and latches the cleaner using the pushing-up force by the second driving means;
    The inkjet recording apparatus according to claim 10.
  13. The blade and the ink absorber are each made of a porous material,
    An average pore diameter of the porous material of the ink absorber is smaller than that of the blade;
    The inkjet recording apparatus according to claim 1.
JP2008239508A 2008-09-18 2008-09-18 Inkjet recording device Active JP5238423B2 (en)

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JP5899968B2 (en) * 2012-01-31 2016-04-06 株式会社リコー Image forming apparatus
CN103707645A (en) * 2013-12-11 2014-04-09 浙江工业大学 Ink-jet print head cleaning and scraping device of franking machine

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JP2875637B2 (en) * 1991-01-19 1999-03-31 キヤノン株式会社 Ink jet recording apparatus and method for cleaning recording head used in the apparatus
JPH06218940A (en) * 1993-01-25 1994-08-09 Fuji Xerox Co Ltd Ink jet recording apparatus
JPH09220811A (en) * 1996-02-20 1997-08-26 Brother Ind Ltd Wiper device of ink jet recording apparatus
JPH09277568A (en) * 1996-04-19 1997-10-28 Brother Ind Ltd Ink recovery device of ink jet recorder
JP2003165232A (en) * 2001-12-03 2003-06-10 Konica Corp Ink jet recorder
JP4284443B2 (en) * 2003-09-10 2009-06-24 富士フイルム株式会社 Ink jet recording apparatus and ink discharge surface cleaning method
JP5096108B2 (en) * 2006-11-27 2012-12-12 株式会社リコー Liquid ejecting apparatus and image forming apparatus

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