Maintenance apparatus and inkjet recording apparatus

Abstract

To supply a sufficient amount of cleaning liquid to a nozzle surface without scattering the cleaning liquid.SOLUTION: A maintenance apparatus comprises: a cap 72 that is attached to a nozzle surface 14F of an ink jet head 12; a lifting device that raises and lowers at least one of the ink jet head 12 and the cap 72; a cleaning liquid supply device that supplies cleaning liquid to the cap 72; a rocking device 75 that rocks the cap 72; and a control unit that controls the lifting device, the cleaning liquid supply device, and the rocking device 75. The cap 72 comprises: a base portion 72B; a wall portion 72W that projects upward from an upper surface of the base portion 72B and surrounds the nozzle surface 14F; and an elastic body 72E that is laid in a region inside the wall portion 72W of the base portion 72B and has liquid absorbency.SELECTED DRAWING: Figure 16

Description

[Technical Field]

[0001] The present invention relates to a maintenance device and an inkjet recording apparatus. [Background technology]

[0002] In inkjet recording devices, ink may remain on or adhere to the nozzle surface of an inkjet head, causing ejection problems. Therefore, technologies for cleaning the nozzle surface have been studied. For example, Patent Document 1 discloses a configuration in which a wiper scrapes off cleaning liquid from a cleaning liquid supply port adjacent to the nozzle surface, and the wiper holding the cleaning liquid slides along the nozzle surface. Patent Document 2 discloses a configuration in which a spray nozzle sprays cleaning liquid onto the nozzle surface, and the wiper wipes the nozzle surface. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2018-108711 [Patent Document 2] Japanese Patent Application Laid-Open No. 2002-19132 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the configuration disclosed in Patent Document 1, the wiper has a low ability to retain cleaning fluid, resulting in an insufficient supply of cleaning fluid to the nozzle surface.In the configuration disclosed in Patent Document 2, there is a risk that cleaning fluid will splash and contaminate the interior of the machine.

[0005] SUMMARY OF THE INVENTION In consideration of the above circumstances, an object of the present invention is to supply a sufficient amount of cleaning liquid to the nozzle surface without scattering the cleaning liquid. [Means for solving the problem]

[0006] In order to solve the above problem, the maintenance device of the present invention comprises a cap attached to the nozzle face of an inkjet head, a lifting device that lifts and lowers at least one of the inkjet head and the cap, a cleaning liquid supplying device that supplies cleaning liquid to the cap, a swinging device that swings the cap, and a control unit that controls the lifting device, the cleaning liquid supplying device, and the swinging device, wherein the cap comprises a base, a wall that protrudes upward from the top surface of the base and surrounds the nozzle face, and a liquid-absorbent elastic body that is laid in an area of ​​the base inside the wall, and the control unit supplies cleaning liquid to the cap using the cleaning liquid supplying device and presses the elastic body against the nozzle face using the lifting device, and then swings the cap.

[0007] The elastic body may be larger than a dischargeable area of ​​the nozzle surface where the discharge ports are provided, and smaller than the nozzle surface.

[0008] The cleaning liquid supply device may control the liquid level of the cleaning liquid so that it is higher than the bottom surface of the elastic body and lower than the nozzle surface.

[0009] The wall portion may be large enough to completely surround a nozzle plate having the nozzle surface.

[0010] The upper surface of the elastic body is located at a lower position than the upper end of the wall portion, the wall portion has a size that can surround the entire circumference of an ejection area of ​​the nozzle surface in which an ejection port is provided, and the control unit may raise and lower at least one of the inkjet head and the cap to a height where the upper end of the wall portion contacts the nozzle surface and the elastic body does not contact the nozzle surface, and a height where the upper end of the wall portion and the elastic body contact the nozzle surface.

[0011] An inkjet recording apparatus according to the present invention includes the inkjet head and the maintenance device. [Effects of the Invention]

[0012] According to the present invention, cleaning liquid can be supplied abundantly to the nozzle surface without scattering. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a perspective view showing the appearance of an inkjet recording apparatus according to an embodiment of the present invention. [Figure 2] 1 is a side view schematically illustrating the internal configuration of an inkjet recording apparatus according to an embodiment of the present invention. [Figure 3] 1 is a perspective view schematically illustrating the internal configuration of an inkjet recording apparatus according to an embodiment of the present invention. [Figure 4] 1 is a perspective view showing an inkjet head according to an embodiment of the present invention; [Figure 5] 1 is a perspective view showing an inkjet head according to an embodiment of the present invention; [Figure 6] FIG. 2 is a right side view showing an inkjet head according to an embodiment of the present invention. [Figure 7] FIG. 2 is a bottom view showing an inkjet head according to an embodiment of the present invention. [Figure 8] FIG. 2 is a rear view showing the inkjet head according to the embodiment of the present invention. [Figure 9] FIG. 1 is a perspective view showing a cap according to an embodiment of the present invention. [Figure 10] FIG. 1 is a perspective view showing a cap according to an embodiment of the present invention. [Figure 11] FIG. 1 is a plan view showing a cap according to an embodiment of the present invention. [Figure 12] FIG. 2 is a right side view showing a cap according to an embodiment of the present invention. [Figure 13] FIG. 1 is a cross-sectional view showing a cap according to an embodiment of the present invention. [Figure 14] FIG. 2 is a bottom view showing a cap according to an embodiment of the present invention. [Figure 15] FIG. 2 is a rear view showing the cap according to the embodiment of the present invention. [Figure 16]FIG. 2 is a cross-sectional view showing a state in which a cap is attached to an inkjet head according to an embodiment of the present invention. [Figure 17] FIG. 17 is an enlarged view showing the lower front side of FIG. [Figure 18] FIG. 10 is a plan view showing a cap according to a modified example of an embodiment of the present invention. [Figure 19] FIG. 10 is a right side view showing a cap according to a modified example of the embodiment of the present invention. [Figure 20] FIG. 10 is a cross-sectional view showing a cap according to a modified example of an embodiment of the present invention. [Figure 21] FIG. 10 is a cross-sectional view showing a state in which a cap is attached to an inkjet head according to a modified example of an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0014] An inkjet recording apparatus 1 according to one embodiment of the present invention will be described below with reference to the drawings.

[0015] FIG. 1 is a perspective view showing the appearance of inkjet recording apparatus 1. FIG. 2 is a side view schematically showing the internal configuration of inkjet recording apparatus 1. FIG. 3 is a perspective view schematically showing the internal configuration of inkjet recording apparatus 1. FIGS. 4 and 5 are perspective views showing inkjet head 12. FIG. 6 is a right side view showing inkjet head 12. FIG. 7 is a bottom view showing inkjet head 12. FIG. 8 is a rear view showing inkjet head 12. In the following description, the left side of the paper in FIG. 2 is the front side (front side) of inkjet recording apparatus 1, and the left and right directions are described based on the direction when inkjet recording apparatus 1 is viewed from the front. In each drawing, U, Lo, L, R, Fr, and Rr represent up, down, left, right, front, and rear, respectively.

[0016] The inkjet recording apparatus 1 (see FIGS. 1 and 2) includes a lower housing 3A and an upper housing 3B disposed above the lower housing 3A. Inside the lower housing 3A, there are a payout roll 4, a take-up roll 9 disposed in front of the payout roll 4, a transport unit 7 disposed above the payout roll 4 and the take-up roll 9, and a transport path 10 extending from the payout roll 4 to the take-up roll 9 via the transport unit 7. One end of the sheet S is wound around the payout roll 4, and the other end of the sheet S is wound around the take-up roll 9. The sheet S may be paper, a resin film, cloth, or the like. The transport unit 7 includes a drive roller 25, a driven roller 22 disposed parallel to and behind the drive roller 25, and an endless belt 21 wound around the drive roller 25 and the driven roller 22.

[0017] The upper housing 3B houses an imaging unit 6 and a maintenance device 30. The imaging unit 6 includes a plurality of inkjet heads 12 (four in this embodiment) facing the transport unit 7. The imaging unit 6 ejects ink onto the sheet S on the transport unit 7 while being reciprocated in the left-right direction by a drive device (not shown). The maintenance device 30 will be described later.

[0018] The inkjet head 12 (see FIG. 6) includes a rectangular parallelepiped housing 12H whose longitudinal direction is the front-to-rear direction, a nozzle plate 14 whose longitudinal direction is the front-to-rear direction and provided on the bottom of the housing 12H, and a socket 12S to which a pipe for supplying ink is connected. The nozzle plate 14 includes a number of nozzles 14N arranged in the front-to-rear direction. The nozzles 14N include branch flow paths 14B branching off from the downstream side of the socket 12S and a number of ejection orifices 14A provided in a nozzle surface 14F, which is the lower surface of the nozzle plate 14. The ejection orifices 14A are provided in a rectangular region (referred to as an ejectable region 14R) of the nozzle surface 14F excluding both front and rear ends and both left and right ends. A vibration plate 14V also serves as part of the inner wall of the branch flow path 14B. A pressure element 14Z is provided on the vibration plate 14V. The pressure element 14Z may be a piezoelectric element, an electrostatic actuator, a heater, or the like. The pressure element 14Z is connected to a drive circuit 12D that drives the pressure element 14Z.

[0019] The control unit 2 (see FIG. 2) includes a calculation unit and a storage unit (not shown). The calculation unit is, for example, a CPU (Central Processing Unit). The storage unit includes storage media such as a ROM (Read Only Memory), a RAM (Random Access Memory), and an EEPROM (Electrically Erasable Programmable Read Only Memory). The calculation unit performs various processes by reading and executing control programs stored in the storage unit. Note that the control unit 2 may be realized by an integrated circuit that does not use software.

[0020] The basic image formation operation of the inkjet recording device 1 is as follows: When an image formation job is input to the inkjet recording device 1 from an external computer or the like, the control unit 2 drives the payout roll 4, the transport unit 7, and the take-up roll 9 in the counterclockwise direction in FIG. 2, and the sheet S is transported in the Y direction along the transport path 10. When the control unit 2 supplies a drive signal corresponding to the image data to the drive circuit 12D in synchronization with the transport of the sheet S, the drive circuit 12D supplies an ejection signal corresponding to the gradation of the image data to the pressure element 14Z, and ink is ejected from the nozzle 14N.

[0021] [Maintenance equipment] The maintenance device 30 (see FIG. 3) includes a cap unit 31 and a wiping unit 32. The maintenance device 30 is provided at the right end of the upper housing 3B. Although only one wiping unit 32 is shown in FIG. 3, in reality, the same number of wiping units 32 as the inkjet heads 12 are arranged at the same intervals as the inkjet heads 12.

[0022] [Wipe unit] The wiping unit 32 includes a frame 81 and a blade 82 provided on the upper surface of the frame 81. The maintenance device 30 is provided with a slide device 83 that slides the wiping unit 32 in the front-to-rear direction (the longitudinal direction of the nozzle surface 14F).

[0023] [Cap Unit] The cap unit 31 has a rectangular parallelepiped frame 71. The portion of the frame 71 that corresponds to the upper surface of the rectangular parallelepiped is open. The frame 71 is provided with the same number of caps 72 as the inkjet heads 12, in the same arrangement as the inkjet heads 12 in the imaging unit 6. The maintenance device 30 is provided with an elevator device 77 that raises and lowers the cap unit 31. After the imaging unit 6 moves above the cap unit 31, the cap unit 31 is raised, and the caps 72 are attached to the nozzle surface 14F. The elevator device 77 may be provided in the imaging unit 6.

[0024] [cap] Figures 9 and 10 are perspective views of the cap 72. Figure 11 is a plan view of the cap 72. Figure 12 is a right side view of the cap 72. Figure 13 is a cross-sectional view of the cap 72. Figure 14 is a bottom view of the cap 72. Figure 15 is a rear view of the cap 72. Figure 16 is a cross-sectional view showing the cap 72 attached to the inkjet head 12. Figure 17 is an enlarged view of the lower front part of Figure 16.

[0025] The cap 72 includes a base 72B, a wall 72W, and an elastic body 72E. The base 72B is formed in a flat plate shape with the longitudinal direction extending in the front-to-rear direction. The wall 72W protrudes upward from the upper surface of the base 72B. The space inside the wall 72W is rectangular and wider in the front-to-rear and left-to-right directions than the nozzle surface 14F when viewed from above. In other words, the wall 72W is large enough to surround the entire periphery of the nozzle plate 14. The base 72B and the wall 72W are integrally formed using resin, metal, or the like.

[0026] The elastic body 72E is provided on the upper surface of the base 72B and at the center in the front-rear and left-right directions inside the wall portion 72W. The upper surface of the elastic body 72E is located lower than the upper end of the wall portion 72W and is parallel to the nozzle surface 14F. The elastic body 72E is preferably made of a material with a low coefficient of friction and high liquid absorption, such as sponge, cloth, urethane, or pile fabric. The length L2 of the elastic body 72E in the front-rear direction (longitudinal direction) is longer than the length L1 of the ejectable region 14R and shorter than the length L3 of the nozzle surface 14F. The width W2 of the elastic body 72E in the left-right direction (direction intersecting the longitudinal direction) is wider than the width W1 of the ejectable region 14R and narrower than the width W3 of the nozzle surface 14F. In other words, the elastic body 72E is larger than the ejectable region 14R and smaller than the nozzle surface 14F.

[0027] The base 72B is provided with a supply hole 72K behind the elastic body 72E and a discharge hole 72H in front of the elastic body 72E. A tank 13T that stores cleaning liquid and a pump 13P that delivers cleaning liquid to the cap 72 are connected to the supply hole 72K via a supply pipe 73K (see FIG. 3). A pump 15P that sucks waste liquid containing ink and cleaning liquid from the cap 72 and a tank 15T that stores the waste liquid are connected to the discharge hole 72H via a discharge pipe 73H. The cleaning liquid supply device 13 controls the liquid level of the cleaning liquid so that it is higher than a height H1 of the bottom surface of the elastic body 72E and lower than a height H2 of the nozzle surface 14F.

[0028] The cap 72 is attached to the frame 71 via a support plate 74. The support plate 74 is immovable relative to the frame 71. The cap 72 is movable in the front-rear direction relative to the support plate 74. A swinging device 75 is provided on the support plate 74. The swinging device 75 includes a biasing member 75A (e.g., a compression coil spring) and an eccentric cam 75B whose axial direction is the up-down direction. The biasing member 75A is provided behind the base 72B and biases the base 72B forward. The eccentric cam 75B is provided in front of the base 72B and is in contact with the front end surface of the base 72B. The eccentric cam 75B is rotated by a motor or the like (not shown), causing the cap 72 to swing in the front-rear direction. The swinging device 75 may be a vibration motor or the like.

[0029] [Maintenance device operation] Next, the operation of the maintenance device 30 will be described. Maintenance of the inkjet head 12 is performed at a predetermined timing. The predetermined timing may be, for example, after one image forming job is completed, after a predetermined amount of image formation has been performed, or periodically. Before maintenance begins, the cap unit 31 is retracted downward, and the wipe unit 32 is retracted rearward.

[0030] First, the control unit 2 moves the imaging unit 6 above the cap unit 31. Next, the control unit 2 causes the cleaning liquid supply device 13 to supply cleaning liquid to the cap 72, and causes the lifting device 77 to lift the cap unit 31. The elastic body 72E has high liquid absorption properties and therefore absorbs the cleaning liquid. As the cap unit 31 lifts, the nozzle plate 14 is accommodated in the space inside the wall portion 72W, and the elastic body 72E is pressed against the nozzle surface 14F. The pressure of the elastic body 72E causes cleaning liquid to be released from the elastic body 72E, and the cleaning liquid is supplied abundantly to the nozzle surface 14F. Because the nozzle plate 14 is surrounded by the wall portion 72W, scattering of cleaning liquid is suppressed.

[0031] Next, the control unit 2 drives the eccentric cam 75B to swing the cap 72 back and forth for a predetermined time. Because the elastic body 72E has a low coefficient of friction, it slides smoothly against the nozzle surface 14F, allowing the cleaning liquid to penetrate into the highly viscous ink remaining on the nozzle surface 14F.

[0032] Next, the control unit 2 lowers the cap unit 31, positions the image-forming unit 6 so that all of the inkjet heads 12 are positioned in front of the wiping unit 32, and slides the wiping unit 32 using the sliding device 83 to wipe away waste liquid containing ink and cleaning liquid from the nozzle surface 14F.

[0033] Next, the control unit 2 retracts the wiping unit 32 rearward, then moves the imaging unit 6 above the cap unit 31, raises the cap unit 31, and waits until a new image formation job is input. Because the elastic body 72E is pressed against the nozzle surface 14F, the nozzle surface 14F is moisturized, and an increase in the viscosity of the ink in the nozzles 14N is suppressed.

[0034] The maintenance device 30 according to the present embodiment described above includes an inkjet head 12, a cap 72 attached to the nozzle surface 14F of the inkjet head 12, a lifting device 77 for raising and lowering at least one of the inkjet head 12 and the cap 72, a cleaning liquid supplying device 13 for supplying cleaning liquid to the cap 72, a swinging device 75 for swinging the cap 72, and a control unit 2 for controlling the lifting device 77, the cleaning liquid supplying device 13, and the swinging device 75. The cap 72 includes a base 72B, a wall 72W that protrudes upward from the upper surface of the base 72B and surrounds the nozzle surface 14F, and a liquid-absorbent elastic body 72E that is laid in an area of ​​the base 72B inside the wall 72W. The control unit 2 supplies cleaning liquid to the cap 72 using the cleaning liquid supplying device 13, presses the elastic body 72E against the nozzle surface 14F using the lifting device 77, and then swings the cap 72. According to this embodiment, the cleaning liquid can be supplied abundantly to the nozzle surface 14F without scattering.

[0035] Furthermore, according to the maintenance device 30 of this embodiment, the elastic body 72E is larger than the dischargeable area 14R of the nozzle surface 14F where the discharge ports 14A are provided, but smaller than the nozzle surface 14F. According to this embodiment, it is possible to supply cleaning liquid to the dischargeable area 14R in just the right amount. It is also possible to prevent wear of the elastic body 72E due to friction with the edge of the nozzle surface 14F.

[0036] Furthermore, according to the maintenance device 30 of this embodiment, the cleaning liquid supply device 13 controls the liquid level of the cleaning liquid so that it is higher than the bottom surface of the elastic body 72E and lower than the nozzle surface 14F. According to this embodiment, it is possible to prevent the cleaning liquid from entering the interior of the inkjet head 12.

[0037] Furthermore, according to the maintenance device 30 of this embodiment, the wall portion 72W has a size that allows it to surround the entire periphery of the nozzle plate 14 on which the nozzle surface 14F is provided. According to this embodiment, it is possible to prevent deterioration of the nozzle surface 14F due to friction with the wall portion 72W.

[0038] Furthermore, the inkjet recording apparatus 1 according to this embodiment includes the inkjet head 12 and the maintenance device 30. According to this embodiment, ink ejection defects are suppressed, and therefore deterioration in image quality can be suppressed.

[0039] The above embodiment may be modified as follows.

[0040] Fig. 18 is a plan view showing the cap 72. Fig. 19 is a right side view showing the cap 72. Fig. 20 is a cross-sectional view showing the cap 72. Fig. 21 is a cross-sectional view showing the state in which the cap 72 is attached to the inkjet head 12.

[0041] In this modified example, the configuration of the wall portion 72W is different from that of the above embodiment. The space inside the wall portion 72W is rectangular, wider in the front-rear and left-right directions than the ejectable area 14R when viewed from above, but narrower in the front-rear and left-right directions than the nozzle surface 14F. In other words, the wall portion 72W is large enough to surround the entire ejectable area 14R of the nozzle surface 14F. The upper end of the wall portion 72W is located higher than the upper surface of the elastic body 72E and is parallel to the nozzle surface 14F. The material of the wall portion 72W is preferably a material with a high coefficient of friction, low liquid absorption, and flexibility, such as rubber or silicone rubber.

[0042] First, the control unit 2 moves the imaging unit 6 above the cap unit 31. Next, the control unit 2 supplies cleaning liquid to the cap 72 and raises the cap unit 31. The elastic body 72E has high liquid absorption properties and therefore absorbs the cleaning liquid. As the cap unit 31 rises, the upper end of the wall portion 72W comes into contact with the nozzle surface 14F before the elastic body 72E does. Next, the wall portion 72W bends, and the elastic body 72E is pressed against the nozzle surface 14F. The pressure of the elastic body 72E causes cleaning liquid to be released from the elastic body 72E, and the cleaning liquid is supplied abundantly to the nozzle surface 14F. Because the wall portion 72W is in contact with the nozzle surface 14F, scattering of the cleaning liquid is suppressed.

[0043] Next, the control unit 2 drives the eccentric cam 75B to swing the cap 72 back and forth for a predetermined time. Because the elastic body 72E has a low coefficient of friction, it slides smoothly against the nozzle surface 14F, allowing the cleaning liquid to penetrate into the highly viscous ink remaining on the nozzle surface 14F. Meanwhile, the wall portion 72W has a high coefficient of friction, but is flexible, so it repeatedly undergoes shear deformation back and forth.

[0044] Next, the control unit 2 lowers the cap unit 31 and moves the imaging unit 6 between the transport unit 7 and the cap unit 31. Next, the control unit 2 moves the wiping unit 32 forward to wipe away the waste liquid containing ink and cleaning liquid from the nozzle surface 14F, and then retracts the wiping unit 32 rearward.

[0045] Next, the control unit 2 moves the imaging unit 6 above the cap unit 31, raises the cap unit 31 to a height where the wall portion 72W contacts the nozzle surface 14F and the elastic body 72E does not contact the nozzle surface 14F, and waits until a new image formation job is input.

[0046] According to this modification, the upper surface of the elastic body 72E is located lower than the upper end of the wall portion 72W, and the wall portion 72W is large enough to completely surround the ejectable area 14R of the nozzle surface 14F, where the ejection ports 14A of the nozzles 14N are provided. The control unit 2 raises and lowers at least one of the inkjet head 12 and the cap 72 to a height where the upper end of the wall portion 72W contacts the nozzle surface 14F but the elastic body 72E does not contact the nozzle surface 14F, and a height where the upper end of the wall portion 72W and the elastic body 72E contact the nozzle surface 14F. According to this embodiment, because the ejectable area 14R is surrounded by the wall portion 72W, the nozzle surface 14F is moisturized, and an increase in the viscosity of the ink in the nozzles 14N is suppressed. Furthermore, compared to the above embodiment, the elastic body 72E comes into contact with the nozzle surface 14F less frequently, thereby suppressing deterioration of the nozzle surface 14F. Furthermore, it is possible to prevent the waste liquid from scattering when the elastic body 72E is pressed against the nozzle surface 14F. [Explanation of symbols]

[0047] 1. Inkjet recording device 2. Control Unit 12 Inkjet head 13 Cleaning liquid supply device 14F nozzle surface 14R Discharge possible area 72 Cap 72B base 72W wall 72E Elastic body 75 Oscillating device 77 Lifting device

Claims

1. a cap attached to the nozzle surface of the inkjet head; an elevating device that elevates at least one of the inkjet head and the cap; a cleaning liquid supply device for supplying a cleaning liquid to the cap; a swinging device that swings the cap; a control unit that controls the lifting device, the cleaning liquid supply device, and the swinging device; Equipped with The cap is A base and a wall portion that protrudes upward from an upper surface of the base portion and surrounds the nozzle surface; a liquid-absorbent elastic body laid in an area of ​​the base portion that is inside the wall portion; The control unit supplies cleaning liquid to the cap using the cleaning liquid supply device, presses the elastic body against the nozzle surface using the lifting device, and then swings the cap.

2. The maintenance device according to claim 1 , wherein the elastic body is larger than a dischargeable area of ​​the nozzle surface where the discharge ports are provided, and smaller than the nozzle surface.

3. 3. The maintenance device according to claim 1, wherein the cleaning liquid supply device controls the liquid level of the cleaning liquid so that the liquid level is higher than the bottom surface of the elastic body and lower than the nozzle surface.

4. The maintenance device according to claim 1 , wherein the wall portion has a size that allows the wall portion to completely surround a nozzle plate having the nozzle surface.

5. The upper surface of the elastic body is located lower than the upper end of the wall portion, the wall portion has a size sufficient to completely surround an ejection area of ​​the nozzle surface in which the ejection ports are provided, The control unit 2. The maintenance device according to claim 1, wherein at least one of the inkjet head and the cap is raised and lowered to a height at which an upper end of the wall portion contacts the nozzle surface and the elastic body does not contact the nozzle surface, and to a height at which the upper end of the wall portion and the elastic body contact the nozzle surface.

6. the inkjet head; An inkjet recording apparatus comprising: the maintenance device according to claim 1 .

Images