JP2009226717A - Inkjet recording device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inkjet recording device always obtaining high-definition image formation by restraining ink from flowing over a blade to soil the peripheral part or the like of a recording head. <P>SOLUTION: The inkjet recording device has a cleaning blade 20 formed of a plurality of porous materials having two or more kinds of pore diameters. The cleaning blade 20 has a blade 23 formed of the porous material with the large pore diameter on the wiping direction side, and a blade 24 formed of the porous material with the small pore diameter on the opposite side. Purge liquid drops 13a can thereby be effectively sucked and eliminated to prevent the peripheral part of the recording head 10 from being soiled. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an ink jet recording apparatus equipped with a cleaning blade 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.

  In addition, 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 close proximity to the nozzle plate, resulting in paper stains and image stains, which also deteriorates the print quality. End up.

  In order to prevent such deterioration in image quality, ink droplets and dust are removed by wiping the nozzle plate with a cleaning blade before and after recording. This cleaning blade is usually made of a flexible rigid body such as rubber, and is moved in close contact with the nozzle plate so that ink droplets, dust and the like can be removed.

  Usually, ink is dropped from the nozzle portion of the recording head by purging and wiped with a rigid blade. At that time, the wiped ink accumulates on the front surface of the blade and falls along the blade surface. However, if the amount of ink after purging is large, it adheres to the entire blade front surface, overflows from the blade end, and soils the print head periphery.

  Several approaches have been proposed to remedy these problems. In order to prevent the above-mentioned problems, it is necessary to prevent the ink from overflowing on the front surface of the blade, and as one means there is a blade using a porous material.

  For example, in Patent Document 1 described below, by using a porous blade for cleaning a recording head, it is possible to wipe in a state where the contact pressure is low, and the water repellency of the nozzle plate is maintained over a long period of time. In addition, it is described that a droplet can be reliably removed by capillary action by making the pore diameter smaller than the nozzle.

  As another technique, for example, in Patent Document 2 below, a large droplet on a recording head is removed with a comb-like member and then wiped with an elastic blade. It is described that it is possible to prevent splattering and soiling the surroundings.

Further, in Patent Document 3 below, when cleaning the discharge surface, the larger one of the two types of absorbers having different average pore diameters is brought into contact with the discharge port of the discharge surface and its adjacent region, and ink is supplied. It is described that when absorbed, the absorbed ink is transferred to an absorber having a smaller average pore diameter by capillary action, so that the absorptivity is not lowered and cleaning can be performed.
Japanese Patent No. 2738855 JP 2005-96340 A JP 2007-130809 A

  As described above, the recording head cleaning method uses a capillary phenomenon such as the use of a porous material, so that it is possible to perform cleaning while eliminating the drawbacks of the rigid blade. However, since the technique proposed in Patent Document 1 described above has an average pore diameter smaller than the nozzle diameter of the recording head, the pores are saturated immediately after filling with ink, and the ink is sufficiently absorbed. It becomes impossible to do. Further, since the speed of absorbing ink is slow, the speed of moving the blade, that is, the speed of wiping becomes slow.

  In addition, in the case of pigment ink, since there are solid particles, the ink is absorbed into the pores, so that the solvent and solid components are separated and thickened and aggregated, so the pores are immediately clogged. Absorbability may be reduced. The technique proposed in Patent Document 2 can remove large droplets adhering to the nozzle plate surface of the recording head. However, if a large number of small droplets remain, the accumulated volume may become so large that it overflows at both ends when cleaned with a rigid blade.

  Further, in the technique proposed in Patent Document 3, since the absorber for cleaning the ejection surface is only one having a large average pore diameter, a sufficient ink absorption amount cannot be secured, and the ink on the nozzle plate is not secured. Left unwiped. In addition, since the amount of residual ink is large, the flying direction of ink droplets ejected from the nozzles may be bent, or the residual ink may adhere to the paper, thereby degrading the image quality.

  Therefore, according to the present invention, in the cleaning blade for wiping the nozzle portion, nozzle plate, etc. of the recording head, the ink overflows the blade and the stain on the periphery of the recording head is suppressed, so that a high-quality image can always be formed. It is an object of the present invention to provide an ink jet recording apparatus that can be used.

  That is, the ink jet recording apparatus of the present invention is an ink jet recording apparatus for recording an image by ejecting ink from a nozzle provided on a nozzle plate of a recording head to a recording medium, and an ink attached to the nozzle plate of the recording head. It has an ink absorbing member that absorbs and removes the ink by contact, and has a cleaning mechanism for cleaning the nozzle plate by moving the absorbing member in a plane parallel to the nozzle plate, The absorbing member is composed of a plurality of porous members having different average pore diameters, and among the plurality of porous members, a porous member having a large average pore diameter is disposed in front of the moving direction during cleaning. And

  The ink jet recording apparatus of the present invention is an ink jet recording apparatus that records an image by ejecting ink from a nozzle provided on a nozzle plate of a recording head to a recording medium, and ink attached to the nozzle plate of the recording head. A cleaning mechanism that cleans the nozzle plate by moving the absorbing member in a plane parallel to the nozzle plate. The absorbing member is composed of a plurality of porous members having different average pore diameters, and among the plurality of porous members, a porous member having a small average pore diameter is disposed behind the moving direction during cleaning. Features.

  According to the present invention, in a cleaning blade for wiping the nozzle portion, nozzle plate, and the like of a recording head, ink overflows the blade, and stains on the periphery of the recording head, etc. are suppressed, and high-quality image formation is always obtained. An ink jet recording apparatus capable of achieving the above can be provided.

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

(First embodiment)
FIG. 1 shows a schematic configuration of a recording head 10 and a cleaning blade 20 in an ink jet recording apparatus according to a first embodiment of the present invention. FIG. 1 (a) is a schematic diagram of a state before wiping. ) Is a schematic diagram of a state in the middle of the wipe.

  In the present 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 mounted. The illustration and description thereof are omitted, and the cleaning blade 20 which is a characteristic part of the present invention and the recording head 10 related to the cleaning blade 20 are illustrated and described.

  The recording head 10 in this 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 13 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 used, and the recording heads may be arranged so as to be longer 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 cleaning blade 20 is constituted by a blade made of at least two kinds of porous materials. For example, the cleaning blade 20 has a blade portion 21 composed of a blade 23 made of a porous material having a large pore diameter and a blade 24 made of a porous material having a pore diameter smaller than that of the porous material blade 23. is doing. The blade portion 21 is formed when the cleaning blade 20 is moved in the wipe movement direction by moving the porous material blade 23 having a large pore diameter to the front side when the cleaning blade 20 is moved in the wipe movement direction indicated by the arrow A in the figure. A blade 24 made of a porous material having a small pore diameter is arranged on the rear side of the above.

  The blade portion 21 is fixed to the blade support portion 22. Then, the cleaning blade 20 is moved in the wipe movement direction indicated by the arrow A by a driving device (not shown), so that the nozzle plate 11 and the like of the recording head 10 are wiped.

  Next, an operation of cleaning the nozzle plate 11 of the recording head by the cleaning blade 20 configured as described above will be described.

  FIG. 1B is a diagram schematically showing the state of the cleaning blade 20 and the recording head 10 during the wiping. The cleaning blade 20 is wiped with the left side of the recording head 10 as the upstream side in the wiping direction, and proceeds toward the right side of the recording head 10. The right side of the recording head 10 shows a state where the recording head 10 has not been wiped yet. From the nozzle of the nozzle plate 11 on the lower surface of the recording head 10 by applying pressure to the recording head 10 through an ink path (not shown). A state in which the ink 13 hangs down as the purge droplet 13a is shown.

  As soon as the purge droplet 13a comes into contact with the moving direction of the cleaning blade 20, the purge droplet 13a is absorbed by the blade 23 made of a porous material having a large pore diameter and penetrates into the inside thereof. Most of the ink 13 is removed from the purge droplet 13a absorbed by the cleaning blade 20, but a very small amount remains on the nozzle plate 11 as the remaining droplet 13c after wiping.

  In the present embodiment, the blade portion 21 with which the cleaning blade 20 abuts on the recording head 10 has a configuration in which the blades 23 and 24 of porous materials having two kinds of pore diameters are laminated as described above. ing. That is, the blade portion 21 has a blade 23 made of a porous material having a large pore diameter on the traveling direction (wipe direction) side, and a blade 24 made of a porous material having a small pore diameter on the rear side.

  The purge droplet 13a is dropped from a nozzle (not shown) on the nozzle plate 11, and is initially a droplet having a diameter of several millimeters at the beginning of dropping. First, when the blade 23 comes into contact with the purge droplet 13a, most of the droplet volume is quickly absorbed and removed by the blade 23. The absorbed ink 13 descends while penetrating the blade 23 by gravity, and drains into a waste liquid path (not shown).

  Here, the blade 23 of the porous material having a large pore diameter has a large volume of individual pores, so that the suction and movement speed of the ink 13 is fast, and most of the ink 13 on the nozzle plate 11 can be quickly removed. it can. However, since the capillary force is weak when the pore diameter is large, the ink 13 once sucked is left as residual droplets on the nozzle plate 11. This remains as a sufficiently large droplet as the remaining droplet 13b during wiping.

  The porous material blade 24 having a small pore diameter is disposed adjacent to the blade 23 of the porous material having a large pore diameter and sucks and removes the residual liquid droplet 13b in the wipe left by the blade 23. . The blade 24 made of a porous material having a small pore diameter has a larger capillary force than the blade 23, and the amount of the attracted droplets to be reattached to the nozzle plate 11 is small. Therefore, a very small amount of liquid droplets remain as the residual liquid droplets 13c after wiping, or can be wiped with almost no liquid droplets remaining.

As the porous material of the blade used here, the following materials are typical. Alternatively, the following materials or other materials can be used as long as liquid contact with ink can be confirmed.
Polyurethane
polyethylene
Round mouth plain rubber
Natural rubber
Ethylene propylene (EPDM) rubber
Nitrile rubber
Butyl rubber
Fluorine
Silicon rubber
EVA rubber (ethylene vinyl acetate copolymer)
The pore diameter is, for example, large pore diameter> 50 μm, preferably> 75 μm, with about 50 μm as a boundary.

  Similarly, for small pore diameters, <50 μm, and preferably <30 μm is good from the viewpoint of capillary force.

  Here, the porous material blade 23 having a large pore diameter and the porous material blade 24 having a small pore diameter, which are arranged adjacent to each other, have a high capillary force and absorb the ink 13 collected by the blade 23. The blade 24 having a small ink droplet volume and having a sufficient absorption capacity carries part of the ink and absorbs and discharges it, thereby removing the ink droplets on the nozzle plate 11 more effectively. Is possible.

  In the above-described embodiment, the blade portion of the cleaning blade is composed of two types of porous materials. However, the present invention is not limited to this, and three or more types of porous materials having different pore diameters are used. It may be configured.

  In the above-described embodiment, the blade 23 of the porous member having a large average pore diameter is arranged in front of the moving direction at the time of cleaning and the porous member 24 having a small average pore diameter is arranged in the rear. It is not something that can be done. For example, as shown in FIG. 2, when the blade support portion 22 reciprocates with respect to the nozzle plate 11 and the nozzle plate 11 is wiped while reciprocating, the porous member having a large average pore diameter is used. The porous member blades 24 and 24 having a small average pore diameter may be provided on both sides of the blade support portion 23 in the reciprocating direction of the blade support portion. With this configuration, the remaining ink droplets on the nozzle plate can be reduced, and the time spent for wiping can be reduced.

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

  FIG. 3 is a schematic diagram showing a schematic configuration of the recording head 10 and the cleaning blade 20b in the inkjet recording apparatus, as in the first embodiment described above.

  The cleaning blade 20b of the second embodiment is composed of a porous material blade 23 having a large pore diameter and a porous member blade 24 having a small pore diameter, as in the first embodiment described above. The blades 23 and 24 are different from each other in that the air gaps 26 are arranged. The gap 26 is formed so as to maintain an interval such that the two blades 23 and 24 do not come into contact with each other even while the cleaning blade 20b moves in the direction of the arrow A in the figure.

  In the second to fourth embodiments described below, the basic configuration of the recording head and the cleaning blade is the same as that of the first embodiment described above. The same reference numerals are assigned to the same parts, illustration and description thereof are omitted, and only different parts will be described.

  Also in the second embodiment, it is assumed that the components (recording medium supply mechanism, transport mechanism, discharge mechanism, maintenance mechanism, etc.) of a normal image forming apparatus are mounted. The recording head 10 as a part and the recording head related to the cleaning blade 20b will be described with reference to the drawings.

  In the second embodiment, since the blade 23 of the porous member having a large pore diameter is independent of the blade 24 of the porous member having a small pore diameter via the gap 26, the absorption capacity thereof is Less than the cleaning blade 20 of the first embodiment. However, since there is no transfer of the ink 13 from the blade 23 to the blade 24, the residual droplet 13b in the wipe can be sucked and removed without saturating the pores of the ink 13 and degrading the ink absorption performance. Therefore, there is an advantage that the wipe residual droplet 13c can be reliably removed in a smaller amount.

  Also in this embodiment, the porous material of each blade, the preferable range of the pore diameter, and the like are not particularly different from those in the first embodiment.

  Further, in the first embodiment and the second embodiment, there are advantages and disadvantages, respectively, wiping at higher speed according to the request for cleaning, obtaining a cleaner nozzle plate 11, etc. It is possible to use properly depending on the purpose.

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

  FIG. 4 is a schematic diagram showing the configuration of the recording head 10 and the cleaning blade 20c in the ink jet recording apparatus according to the third embodiment of the present invention.

  In the third embodiment, the components of the normal image forming apparatus (recording medium supply mechanism, transport mechanism, discharge mechanism, maintenance mechanism, etc.) are assumed to be mounted. The recording head 10 as a part and the recording head related to the cleaning blade 20c will be described with reference to the drawings.

  In the third embodiment, the configuration of the cleaning blade having the large and small pore diameters is the same as that of the first embodiment described above, the blade 23 is a porous material having a large pore diameter on the wipe direction side, and the pore diameter is on the opposite side. The blade 24 is made of a small porous material. The difference of the present embodiment from the first embodiment is that a partition member 27 that prevents the ink 13 from moving between the blades 23 and 24 adjacent to each other is provided between the blades 23 and 24. It is provided. As shown in FIG. 4, the partition member 27 is configured so that the cleaning blade 20 c does not come into contact with the recording head 10 while the blades 23 and 24 are curved.

  The partition member 27 is made of a metal thin film, and is made of, for example, an aluminum foil having a thickness of 6 to 50 μm, preferably about 6 to 20 μm. By sandwiching the metal thin foil between the blades 23 and 24 of the porous material having large and small pore diameters, first, the porous materials having different pore diameters can be shielded. By blocking between the blades 23 and 24, it is possible to prevent the ink 13 absorbed by the porous material blade 23 having a large pore diameter from flowing into the porous material blade 24 having a small pore diameter. Accordingly, the blade 24 of the porous material having a small pore diameter becomes difficult to be saturated with the ink 13, and the absorption effect can be maintained for a long time.

  Furthermore, by providing the partition member 27 between the blades 23 and 24, the following effects can be obtained.

  Metals have high wettability of the ink 13 due to high surface energy characteristics. As the ink 13 absorbed by the blade 23 of the porous material having a large pore diameter penetrates into the blade 23, it eventually reaches the partition member 27. The ink 13 tends to spread on the surface of the partition member 27 having high wettability, and the ink 13 tends to flow down in the direction of gravity. Therefore, since the ink 13 absorbed by the blade 23 is smoothly discharged, it is difficult to saturate, and wiping can be performed without lowering the ink absorbability.

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

  FIG. 5 shows a configuration of the recording head 10 and the cleaning blade 20d in the ink jet recording apparatus according to the fourth embodiment of the present invention. FIG. 5A is a schematic diagram of a state before wiping. ) Is a schematic diagram of a state in the middle of the wipe.

  In the fourth embodiment, the components of the normal image forming apparatus (recording medium supply mechanism, transport mechanism, discharge mechanism, maintenance mechanism, etc.) are assumed to be mounted. The recording head 10 as a part and the recording head related to the cleaning blade 20d will be described with reference to the drawings.

  In the fourth embodiment, the configuration of the cleaning blade having the large and small pore diameters is the same as that of the first embodiment described above, and the blade 23 of the porous material having the large pore diameter on the wipe direction side is opposite. The side is composed of a blade 24 made of a porous material having a small pore diameter. The difference between the present embodiment and the first embodiment is that these blades 23 and 24 are formed integrally, forming a single blade portion 21d. It is contacting at one point.

  As a method of integrally forming these blade portions 21d, a part of the blade 24 made of a porous material having a small pore diameter is shaved, and the blade 23 made of a porous material having a large pore diameter is fitted into the shaved part. There are ways to do it.

  In the case of the example of FIG. 5, the blade 23 of the porous material having a large pore diameter disposed on the front side when the cleaning blade 20d is moved in the wipe movement direction indicated by the arrow A in FIG. It is arranged close to the plate 11 so as not to contact the nozzle plate 11. Only the blade 24 made of a porous material having a large pore diameter, which is formed so as to cover the blade 23, is in direct contact with the nozzle plate 11.

  In the case of such a shape, as shown in FIG. 5B, the purge droplet 13 a dropped on the nozzle plate 11 is a blade 23 of a porous member having a large pore diameter close to the nozzle plate 11. Most of the water is absorbed and removed, and the rest is absorbed by the blade 24 of the porous member having a small pore diameter. In this method, since the point of contact with the nozzle plate 11 is one point, the number of times is halved compared to the other embodiments that rub against the cleaning blade 20d, which is a major factor in reducing the water repellency of the nozzle plate 11. In addition, the life of the recording head 10 is maintained for a longer period.

  Further, in the example shown in FIG. 5, the blade in which the blade 23 of the porous member having a large pore diameter and the blade 24 of the porous member having a small pore diameter are integrated has been described, but the present invention is not limited to this. That is, the blade 23 of the porous member having a large pore diameter is disposed close to the nozzle plate 11 of the recording head 10, and only the blade 24 of the porous member having a small pore diameter is in contact with the nozzle plate 11 of the recording head 10. The blade portion need not be integrally formed as long as the blade portion is disposed.

  For example, if the blade 23 of the porous member having a large pore diameter is disposed so as not to contact the nozzle plate 11 and only the blade 24 of the porous member having a small pore diameter is disposed to contact the nozzle plate 11. The two blades 23 and 24 may be separated from each other as in the blade portion 21b of the second embodiment described above shown in FIG.

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

  6A and 6B show a configuration of the recording head 10 and the cleaning blade 20e in an ink jet recording apparatus according to the fifth embodiment of the present invention. FIG. 6A is a schematic diagram of a state before wiping. ) Is a schematic diagram of a state in the middle of the wipe.

  In the fifth embodiment, a porous member having a large pore diameter is provided with a porous roller 29 formed in a cylindrical shape. The porous roller 29 is disposed so as to be passively rotatable about the shaft 30 while being in contact with the nozzle plate 11 of the recording head 10. The porous roller 29 is disposed close to the blade so that it does not come into contact with the porous material 24 having a small pore diameter during the wiping but comes into contact with the light after the wiping is completed. Thus, after the wipe is completed, the ink 13 absorbed by the porous roller 29 is discharged by contacting the blade 24 of the porous material having a small pore diameter.

  The porous roller 29 has a function of absorbing and removing the purge liquid droplets 13a as in the above-described embodiment. The porous roller 29 rotates in a predetermined direction so that a large surface area can be used, and the absorbed ink 13 can be discharged well by contacting with the blade 24 of the porous material having a small pore diameter. can do.

  Although 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.

  In each of the above-described embodiments, the example of the horizontally arranged recording head 10 has been described. However, the present invention is not limited to this, and a vertically arranged recording head may be used. The recording head may be a fixed long shape, and is not limited to this.

  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.

1A and 1B show schematic configurations of a recording head 10 and a cleaning blade 20 in an ink jet recording apparatus according to a first embodiment of the present invention, where FIG. 5A is a schematic diagram of a state before wiping, and FIG. It is a schematic diagram of the state. FIG. 5 is a schematic diagram illustrating a schematic configuration of a recording head and a cleaning blade in an ink jet recording apparatus according to a modification of the first embodiment of the present invention. FIG. 6 is a schematic diagram illustrating a schematic configuration of a recording head and a cleaning blade 20b in an ink jet recording apparatus according to a second embodiment of the present invention. It is the schematic diagram which showed the structure of the recording head 10 and the cleaning blade 20c in the inkjet recording device which concerns on the 3rd Embodiment of this invention. FIGS. 4A and 4B show a configuration of a recording head 10 and a cleaning blade 20d in an ink jet recording apparatus according to a fourth embodiment of the present invention, where FIG. 5A is a schematic diagram of a state before wiping, and FIG. It is a schematic diagram of the state. FIGS. 9A and 9B show a configuration of a recording head 10 and a cleaning blade 20e in an ink jet recording apparatus according to a fifth embodiment of the present invention, where FIG. 9A is a schematic diagram of a state before wiping, and FIG. It is a schematic diagram of the state.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Recording head, 11 ... Nozzle plate, 13 ... Ink, 13a ... Purge droplet, 13b ... Residual droplet in wipe, 13c ... Residual droplet after wipe, 20, 20a, 20b, 20c, 20d, 20e ... Cleaning blade , 21 ... Blade part, 22 ... Blade support part, 23 ... Blade of porous material with large pore diameter, 24 ... Blade of porous material with small pore diameter, 26 ... Void, 27 ... Partition member, 29 ... Large pore diameter Porous roller, 30 ... shaft.

Claims (8)

In an inkjet recording apparatus for recording an image by discharging ink from a nozzle provided on a nozzle plate of a recording head to a recording medium,
By having an ink absorbing member that absorbs and removes the ink by contacting the ink attached to the nozzle plate of the recording head, and moving the absorbing member in a plane parallel to the nozzle plate, A cleaning mechanism for cleaning the nozzle plate;
The absorbent member is
Consists of a plurality of porous members having different average pore diameters,
Of the plurality of porous members, a porous member having a large average pore diameter is disposed in front of a moving direction during cleaning.   The inkjet recording apparatus according to claim 1, wherein the plurality of porous members are spaced apart from each other along a moving direction during cleaning.   The inkjet recording apparatus according to claim 2, wherein a partition member for preventing ink from moving between adjacent porous members is disposed between adjacent porous members.   The inkjet recording apparatus according to claim 3, wherein the partition member is made of a highly wettable material.   The inkjet recording apparatus according to claim 3, wherein the partition member is made of a metal thin film.   2. The ink jet recording apparatus according to claim 1, wherein the porous member having a large average pore diameter is moved in a non-contact manner with respect to the slip plate.   The inkjet recording apparatus according to claim 2, wherein the porous member having a large average pore diameter is rotatably supported, and the porous member is in contact with the nozzle plate while being rotated during cleaning. In an inkjet recording apparatus for recording an image by discharging ink from a nozzle provided on a nozzle plate of a recording head to a recording medium,
By having an ink absorbing member that absorbs and removes the ink by contacting the ink attached to the nozzle plate of the recording head, and moving the absorbing member in a plane parallel to the nozzle plate, A cleaning mechanism for cleaning the nozzle plate;
The absorbent member is
Consists of a plurality of porous members having different average pore diameters,
Of the plurality of porous members, a porous member having a small average pore diameter is disposed behind the moving direction during cleaning.

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