Maintenance device and inkjet recording apparatus

Abstract

To add a function for cleaning a blade without increasing the size of a maintenance device.SOLUTION: A maintenance device comprises a supply member 41 which is provided above a blade 82 on a starting point side of a wiping operation, and supplies cleaning liquid to the blade 82 by contact with a tip portion of the blade 82; a link member 42 which supports the supply member 41 and swings about a shaft 42S provided below the supply member 41; a second biasing member 43 which biases the link member 42 to the rear side in the travel direction of the wiping operation; a cleaning liquid supply source which is provided above the supply member 41 for supplying cleaning liquid to the supply member 41; and a supply source lifting device for raising and lowering the cleaning liquid supply source. When the cleaning liquid supply source is raised, the supply member 41 is separated upward from the blade 82. When the cleaning liquid supply source 13 pushes the supply member 41 to the front side in the travel direction against the second biasing member 43, the supply member 41 moves to a position where it can contact the blade 82 during the wiping operation.SELECTED DRAWING: Figure 17

Description

[Technical Field]

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

[0002] In inkjet recording devices, moisture evaporates from the ink in the nozzles of the inkjet head when an image formation job is not being executed, increasing the viscosity of the ink and potentially causing the nozzles to clog. To prevent this, a purging process is performed to eject the ink from the nozzles into the cap. However, leaving ink remaining on the nozzle surface can cause problems, such as the ink dripping onto a sheet or adhering to the nozzle surface during an image formation job. Therefore, technologies for removing ink remaining on the nozzle surface have been studied. For example, Patent Document 1 proposes a configuration for removing ink from the nozzle surface by sliding a blade in contact with the nozzle surface. [Prior art documents] [Patent documents]

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

[0004] In the configuration disclosed in Patent Document 1, a supply member that supplies cleaning liquid to the nozzle surface is provided in the inkjet head, so there is a risk that the sheet may come into contact with the supply member during image formation, causing the sheet to become soiled or the supply member to become damaged. Also, to achieve a high cleaning effect, it is desirable to clean the blade, but adding a new configuration for cleaning the blade would result in the device becoming larger in size.

[0005] SUMMARY OF THE INVENTION In consideration of the above circumstances, an object of the present invention is to add a function for cleaning blades without increasing the size of a maintenance device. [Means for solving the problem]

[0006] In order to solve the above problems, the maintenance device of the present invention includes a blade that performs a wiping operation along the nozzle surface of an inkjet head, a supply member that is provided above the blade at the starting point of the wiping operation and supplies cleaning liquid to the blade by coming into contact with the tip of the blade, a link member that supports the supply member and swings around an axis provided below the supply member, a biasing member that biases the link member rearward in the direction of travel of the wiping operation, a cleaning liquid supply source that is provided above the supply member and supplies cleaning liquid to the supply member, and a supply source lifting device that raises and lowers the cleaning liquid supply source, and when the cleaning liquid supply source is raised, the supply member moves upward away from the blade, and the cleaning liquid supply source presses the supply member forward in the direction of travel against the biasing member, thereby moving the supply member to a position where it can come into contact with the blade during the wiping operation.

[0007] An intake port for taking in cleaning liquid from the cleaning liquid supply source may be provided on the top surface of the supply member, and an opening for allowing excess cleaning liquid to flow out may be provided on a side surface of the supply member.

[0008] The opening may be provided above the blade while it is on standby, and the blade may be cleaned by the cleaning liquid flowing out from the opening.

[0009] An inkjet recording apparatus according to the present invention includes any one of the maintenance devices and the inkjet head. [Effects of the Invention]

[0010] According to the present invention, it is possible to add a function for cleaning the blade without increasing the size of the maintenance device. [Brief explanation of the drawings]

[0011] [Figure 1]1 is a perspective view showing the appearance of an image forming system according to an embodiment of the present invention; [Figure 2] 1 is a front view schematically illustrating the internal configuration of an inkjet recording apparatus according to an embodiment of the present invention. [Figure 3] FIG. 1 is a front view schematically showing a head unit and a maintenance device according to an embodiment of the present invention. [Figure 4] FIG. 2 is a plan view schematically showing a head unit and a wipe unit according to an embodiment of the present invention. [Figure 5] FIG. 2 is a plan view schematically showing a cap unit according to an embodiment of the present invention. [Figure 6] 1 is a cross-sectional view showing an inkjet head according to an embodiment of the present invention. [Figure 7] FIG. 2 is a perspective view showing a wiping unit and a cleaning liquid supply source according to an embodiment of the present invention. [Figure 8] FIG. 1 is a perspective view showing a wipe unit according to an embodiment of the present invention. [Figure 9] FIG. 1 is a perspective view showing a blade unit according to an embodiment of the present invention. [Figure 10] FIG. 2 is a perspective view showing a cross section of a blade unit according to an embodiment of the present invention. [Figure 11] FIG. 2 is a perspective view showing a protruding member and a blade according to an embodiment of the present invention. [Figure 12] FIG. 2 is a perspective view showing a protruding member according to an embodiment of the present invention. [Figure 13] FIG. 2 is a perspective view showing a receiving member according to an embodiment of the present invention. [Figure 14] FIG. 2 is a perspective view showing a receiving member according to an embodiment of the present invention. [Figure 15] FIG. 2 is a perspective view showing a cleaning liquid supply unit and a blade unit according to an embodiment of the present invention. [Figure 16] FIG. 2 is a right side view showing a cleaning liquid supply unit and a blade unit according to an embodiment of the present invention. [Figure 17] FIG. 2 is a right side view showing a cleaning liquid supply unit and a blade unit according to an embodiment of the present invention. [Figure 18] FIG. 2 is a perspective view showing a cleaning liquid supply unit according to an embodiment of the present invention. [Figure 19] FIG. 2 is a perspective view showing a cross section of a cleaning liquid supply unit and a cleaning liquid supply source according to an embodiment of the present invention. [Figure 20] FIG. 2 is a perspective view showing a cross section of a cleaning liquid supply unit and a cleaning liquid supply source according to an embodiment of the present invention. [Figure 21] FIG. 2 is a perspective view showing a cross section of a cleaning liquid supply unit and a cleaning liquid supply source according to an embodiment of the present invention. [Figure 22] FIG. 2 is a perspective view showing a cross section of a cleaning liquid supply unit and a cleaning liquid supply source according to an embodiment of the present invention. [Figure 23] 10A and 10B are front views showing the operation of the maintenance device according to the embodiment of the present invention. [Figure 24] 10A and 10B are plan views illustrating the operation of the wipe unit according to the embodiment of the present invention. [Figure 25] 10A and 10B are right side views illustrating the operation of the wipe unit according to the embodiment of the present invention. [Figure 26] 10A and 10B are right side views illustrating the operation of the wipe unit according to the embodiment of the present invention. [Figure 27] 10A and 10B are right side views illustrating the operation of the wipe unit according to the embodiment of the present invention. [Figure 28] 10A and 10B are right side views illustrating the operation of the wipe unit according to the embodiment of the present invention. [Figure 29] 10A and 10B are right side views illustrating the operation of the wipe unit according to the embodiment of the present invention. [Figure 30] 10A and 10B are right side views illustrating the operation of the wipe unit according to the embodiment of the present invention. [Figure 31] 10A and 10B are cross-sectional views showing the operation of cleaning the blade and the waste liquid tray according to the embodiment of the present invention. [Figure 32] 10A and 10B are cross-sectional views showing the operation of cleaning the blade and the waste liquid tray according to the embodiment of the present invention. [Figure 33] 10A and 10B are cross-sectional views showing the operation of cleaning the blade and the waste liquid tray according to the embodiment of the present invention. [Figure 34]10A and 10B are cross-sectional views showing the operation of cleaning the blade and the waste liquid tray according to the embodiment of the present invention. [Figure 35] 10A and 10B are cross-sectional views showing the operation of cleaning the blade and the waste liquid tray according to the embodiment of the present invention. [Figure 36] 10A and 10B are cross-sectional views showing the operation of cleaning the blade and the waste liquid tray according to the embodiment of the present invention. [Figure 37] 10A and 10B are cross-sectional views showing the operation of cleaning the blade and the waste liquid tray according to the embodiment of the present invention. [Figure 38] 10A and 10B are diagrams illustrating how a cleaning liquid flows out from an opening according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0012] An inkjet recording apparatus 1 according to one embodiment of the present invention will be described below with reference to the drawings.

[0013] FIG. 1 is a perspective view showing the appearance of an image forming system 100. FIG. 2 is a front view schematically showing the internal configuration of an inkjet recording apparatus 1. FIG. 3 is a front view schematically showing a head unit 11 and a maintenance device 30. FIG. 4 is a plan view schematically showing a head unit 11 and a wiping unit 32. FIG. 5 is a plan view schematically showing a cap unit 31. FIG. 6 is a cross-sectional view showing an inkjet head 12. In the following description, the front side of the paper in FIG. 2 is the front side (front side) of the inkjet recording apparatus 1, and the left and right directions are described based on the direction when the inkjet recording apparatus 1 is viewed from the front. In each figure, U, Lo, L, R, Fr, and Rr represent up, down, left, right, front, and rear, respectively.

[0014] The image forming system 100 (see FIG. 1) includes a paper feeder 110, an inkjet recording apparatus 1, a drying apparatus 120, and a post-processing apparatus 130. The paper feeder 110 stores several thousand sheets and supplies the sheets to the inkjet recording apparatus 1. The inkjet recording apparatus 1 forms an image on the sheets using an inkjet method. The drying apparatus 120 heats the sheets conveyed from the inkjet recording apparatus 1 to dry the ink. The post-processing apparatus 130 performs post-processing such as punching, stapling, and folding on the sheets conveyed from the drying apparatus 120.

[0015] The inkjet recording device 1 (see FIG. 2) includes a rectangular parallelepiped main housing 3. A transport unit 7 that adsorbs and transports a sheet in the Y direction is provided in the center of the main housing 3. An imaging unit 6 that ejects ink to form an image is provided above the transport unit 7. A paper feed opening 8 that introduces a sheet from a paper feed device 110 is provided on the right side of the main housing 3. A discharge opening 9 that discharges the sheet on which an image has been formed to a drying device 120 is provided on the left side of the main housing 3. A transport path 10 is provided inside the main housing 3, extending from the paper feed opening 8 through the gap between the transport unit 7 and the imaging unit 6 to the discharge opening 9. A registration roller 18 is provided upstream of the transport unit 7 in the transport direction Y.

[0016] The transport unit 7 includes an endless transport belt 21 and a suction unit 24. The transport belt 21 has a number of air holes (not shown) and is wound around a drive roller 25 and a driven roller 22. The upper surface of the suction unit 24 has a number of air holes (not shown) and is in contact with the inner surface of the transport belt 21. The suction unit 24 sucks air through the air holes of the transport belt 21 and the suction unit 24, thereby adsorbing the sheet to the transport belt 21. The drive roller 25 is driven counterclockwise by a drive unit (not shown) including a motor and a reduction gear, causing the transport belt 21 to rotate counterclockwise, and the sheet adsorbed to the transport belt 21 is transported in the Y direction.

[0017] The imaging unit 6 includes a plurality of (four in this embodiment) head units 11. Each head unit 11 (see FIGS. 3 and 4) includes one or more (three in this embodiment) inkjet heads 12. Each head unit 11 is connected to an ink container 20 filled with black, cyan, magenta, or yellow ink, respectively.

[0018] The inkjet head 12 (see FIG. 6) includes a rectangular parallelepiped housing 12H with its longitudinal direction extending in the front-to-rear direction, a nozzle plate 14 provided at 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 from the downstream side of the socket 12S and ejection ports 14A provided in a nozzle surface 14F, which is the lower surface of the nozzle plate 14. 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. A drive circuit 12D that drives the pressure element 14Z is connected to 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] A display operation unit 19 is provided on the top of the main body housing 3 (see FIGS. 1 and 2). The display operation unit 19 includes a display panel, a touch panel stacked on the display panel, and a keypad (not shown). The control unit 2 displays a screen showing the operation menu and status of the inkjet recording device 1 on the display panel, and controls each part of the inkjet recording device 1 in response to operations detected by the touch panel and the keypad.

[0021] The basic image formation operation of the inkjet recording apparatus 1 is as follows. When an image formation job is input to the inkjet recording apparatus 1 from the display operation unit 19, an external computer, or the like, the paper feeder 110 feeds a sheet into the conveyance path 10 through the paper feed port 8, and the registration rollers 18, whose rotation has been stopped, correct any skew of the sheet. When the registration rollers 18 feed the sheet to the conveyance unit 7 at a predetermined timing, the conveyance unit 7 absorbs the sheet onto the conveyance belt 21 and conveys it in the Y direction. Ink is ejected from the inkjet head 12 onto the sheet, and an image is formed. The sheet with the image formed is conveyed to the drying device 120 through the discharge port 9.

[0022] [Maintenance equipment] Next, we will explain the maintenance device 30. Since the four head units 11 (see FIG. 2) have the same configuration and the four maintenance devices 30 have the same configuration, the following will explain one head unit 11 and one maintenance device 30 that performs maintenance on this head unit 11.

[0023] [Head base] The head unit 11 includes a head base 11B (see FIGS. 3, 4, and 6) that supports the inkjet heads 12. Three inkjet heads 12 are arranged in a staggered pattern on the head base 11B. The head base 11B is a roughly rectangular plate-like member with its longitudinal direction extending in the front-to-rear direction. The head base 11B includes a through-hole (not shown) into which the nozzle plate 14 of the inkjet head 12 is inserted. The lower surface of the head base 11B is a surface (hereinafter referred to as the parallel surface 11P) that is parallel to the nozzle surface 14F. The nozzle surface 14F protrudes downward from the parallel surface 11P.

[0024] The maintenance device 30 (see FIG. 3) is provided to the side of the head unit 11 (in this embodiment, on the upstream side (right side) in the transport direction Y). The maintenance device 30 includes a cap unit 31, a wiping unit 32, and a cleaning liquid supply source 13.

[0025] [Cap Unit] The cap unit 31 (see FIGS. 3 and 5) includes caps 72 in the same number (three in this embodiment) as the inkjet heads 12 included in the head unit 11. The three caps 72 are arranged in a staggered manner, similar to the inkjet heads 12, and are supported by a frame 71.

[0026] [Wipe unit] The wiping unit 32 (see FIGS. 3 and 4) includes a waste liquid tray 81, a blade 82, and a cleaning liquid supply unit 40. The waste liquid tray 81 includes recesses 81U in the same number as the inkjet heads 12 included in the head unit 11. The recesses 81U are arranged in a staggered pattern, similar to the inkjet heads 12. The blade 82 and the cleaning liquid supply unit 40 are provided in each recess 81U.

[0027] [Head lifting device] FIG. 23 is a front view showing the operation of the maintenance device 30. The head lifting device 11L (see FIG. 4) is provided in front of and behind the head base 11B. The head lifting device 11L is configured, for example, with a ball screw, a belt drive device, or the like. The head lifting device 11L raises and lowers the head unit 11 between an image forming position (see FIG. 23(A)) and a retracted position (see FIG. 23(B)). The image forming position is a position where the distance between the conveyance path 10 (the upper surface of the conveyance belt 21) along which the sheet is conveyed and the nozzle surface 14F is a predetermined distance suitable for image formation. The retracted position is a position above the image forming position, where the head unit 11 does not interfere with the wiping unit 32 when the cap unit 31 and the wiping unit 32 are slid horizontally using a cap slide device 34 (described later).

[0028] [Cap slide device] The cap slide device 34 (see FIG. 5) is provided in front of and behind the frame body 71 of the cap unit 31. The cap slide device 34 is composed of, for example, a ball screw, a belt drive device, etc. The cap slide device 34 slides the cap unit 31 to a home position (see FIG. 23(A)) and a maintenance position (see FIG. 23(F)). The home position is a position to the right of the head unit 11 located in the image forming position. The maintenance position is a position below the head unit 11 located in the retracted position.

[0029] [Wiping lifting device] The wiper lifting device 35 (see FIG. 4) is provided in front of and behind the waste liquid tray 81 of the wiper unit 32. The wiper lifting device 35 is configured, for example, with a cam mechanism, a ball screw, or the like. The wiper lifting device 35 raises and lowers the wiper unit 32 between a contact position (see FIG. 23(B)) and a separated position (see FIG. 23(E)). The contact position is a position where the waste liquid tray 81 contacts the cap 72. The separated position is a position where the waste liquid tray 81 is separated upward from the cap 72 by a predetermined distance.

[0030] When the wipe unit 32 is located in the contact position, the wipe unit 32 is placed on the cap unit 31, and therefore, by operating the cap slide device 34, the wipe unit 32 slides together with the cap unit 31 to the home position and the maintenance position. In other words, the cap slide device 34 also functions as a wipe slide device that slides the wipe unit 32 to the home position and the maintenance position. When the wipe unit 32 is located in the separated position, by operating the cap slide device 34, the cap unit 31 slides independently to the home position and the maintenance position, leaving the wipe unit 32 in the home position.

[0031] [Wipe unit] Next, the configuration of the wiping unit 32 will be described in detail. Fig. 7 is a perspective view showing the wiping unit 32 and the cleaning liquid supply source 13. Fig. 8 is a perspective view showing the wiping unit 32. Fig. 9 is a perspective view showing the blade unit 90. Fig. 10 is a perspective view showing a cross section of the blade unit 90. Fig. 11 is a perspective view showing the protruding member 91 and the blade 82. Fig. 12 is a perspective view showing the protruding member 91.

[0032] The wiping unit 32 (see FIG. 7) includes a plurality of (three in this embodiment) blade units 90, a waste liquid tray 81, and a carriage 83. The blade unit 90 (see FIGS. 11 and 12) includes a blade 82, a protruding member 91, a holder 92, and a first biasing member 93.

[0033] [blade] The blade 82 (see Figures 9 to 11) is a flexible, generally rectangular, plate-like member made of resin or the like. The blade 82 is held by the holder 92 in a slightly backward tilted position, with the front-to-rear direction being the thickness direction. The width of the blade 82 in the left-to-right direction is equal to or greater than the width of the nozzle surface 14F. The upper part of the blade 82 is tapered, with the thickness becoming thinner as it approaches the tip.

[0034] [Protruding member] The protruding member 91 (see FIGS. 9 to 12) is integrated with the blade 82. The protruding member 91 includes a base 91B parallel to the blade 82, a first bent portion 911 bent rearward from the upper end of the base 91B, a second bent portion 912 bent upward from the rear end of the first bent portion 911, a rearward inclined portion 91T inclined further rearward than the second bent portion 912, and protruding portions 91P that protrude upward from both left and right ends of the rearward inclined portion 91T and are inclined rearward at the same angle as the rearward inclined portion 91T.

[0035] The left-right width of the base 91B is equal to the width of the blade 82. The up-down length of the base 91B is shorter than the up-down length of the blade 82. The base 91B is joined to the lower part of the rear surface of the blade 82. The left-right width of the first bent portion 911 and the second bent portion 912 is equal to the width of the base 91B. The left-right width of the rear inclined portion 91T is wider than the width of the base 91B. The left-right position of the protrusion 91P is determined so that the tip of the protrusion 91P can contact the left and right parallel surfaces 11P of the nozzle surface 14F.

[0036] Two walls 91C facing each other in the left-right direction are provided on the rear surface of the base 91B (see FIGS. 11 and 12). A shaft 91S protruding leftward is provided on the left surface of the left wall 91C. A shaft 91S protruding rightward is provided on the right surface of the right wall 91C.

[0037] A through-hole 91A penetrating downward is provided in the center in the left-right direction of the first bent portion 911 (see FIGS. 11 and 12). At least a portion of the waste liquid W (a mixture of ink and cleaning liquid) that flows down along the rear surface of the blade 82 passes through the through-hole 91A and falls downward.

[0038] [Fixed part] The fixing member 94 (see FIGS. 9 to 11) fixes the blade 82 to the protruding member 91. The lower part of the blade 82 is sandwiched between the base 91B of the protruding member 91 and the fixing member 94, and the fixing member 94 is fastened to the protruding member 91. The lower edges of the fixing member 94 and the protruding member 91 are tapered (see FIGS. 9 and 12) so that the width in the left-right direction narrows downward. The waste liquid W that flows down from the front surface of the blade 82 to the front surface of the fixing member 94 follows the lower edges of the fixing member 94 and the protruding member 91, collects in the center in the left-right direction, and falls into the recess 81U of the waste liquid tray 81.

[0039] [holder] The holder 92 (see FIGS. 9 to 11) holds the blade 82 via a protruding member 91. A shaft hole 92H into which the shaft 91S of the protruding member 91 is inserted is provided in the lower part of the holder 92. The protruding member 91 can swing back and forth around the shaft 91S. The blade 82 swings together with the protruding member 91. The blade 82 and the protruding member 91 are provided in the holder 92 in an attitude tilted with respect to the left-right direction so that the waste liquid W flows in either the left or right direction. In the illustrated example, the left end of the blade 82 is tilted so that it is positioned slightly rearward of the right end, but it may be tilted in the opposite direction.

[0040] [First biasing member] The first biasing member 93 (see FIGS. 11 and 12) is, for example, a torsion coil spring, and is wound around the shaft portion 91S. One end of the first biasing member 93 engages with the holder 92, and the other end engages with the protruding member 91. The first biasing member 93 biases the protruding member 91 in the counterclockwise direction in FIGS. 9 and 10, and in the clockwise direction in FIG. 11. In other words, the first biasing member 93 biases the blade 82 in a direction that presses the tip end of the blade 82 against the nozzle surface 14F. The first biasing member 93 may be a leaf spring, a compression coil spring, or the like.

[0041] [Waste liquid tray] The waste liquid tray 81 (see Figures 7 and 8) is formed into a rectangular shape with the longitudinal direction extending in the front-to-rear direction as a whole. The waste liquid tray 81 has three recesses 81U that are open at the top. The three recesses 81U are arranged in a staggered pattern similar to the inkjet head 12. When viewed from above, the recesses 81U are formed into a rectangular shape that is elongated in the front-to-rear direction. The length of the recesses 81U in the front-to-rear direction is longer than that of the nozzle surface 14F, and the width of the recesses 81U in the left-to-right direction is wider than that of the nozzle surface 14F. The recesses 81U receive waste liquid W that contains ink and cleaning liquid.

[0042] [carriage] The carriage 83 (see FIGS. 7 to 10) is formed in a plate shape with its longitudinal direction extending in the front-rear direction. A groove 81G is provided between the left and right recesses 81U along the front-rear direction, and the carriage 83 is housed in the groove 81G. The length of the carriage 83 in the front-rear direction is shorter than the length of the groove 81G in the front-rear direction. The carriage 83 is slidable in the front-rear direction along the groove 81G.

[0043] Each of the three recesses 81U houses a blade unit 90. The three blade units 90 are coupled to the carriage 83. The three blade units 90 are arranged on the carriage 83 such that when the carriage 83 is in the rearmost position, the three blade units 90 are located behind the nozzle surface 14F.

[0044] [Carriage drive unit] The waste liquid tray 81 is provided with a carriage drive device 36 (see FIG. 4). The carriage drive device 36 is configured, for example, with a belt drive device, a feed screw, etc., and slides the carriage 83 along the groove 81G, thereby sliding the blade 82. By sliding the blade 82 forward (an example of the direction A of the wiping operation), a wiping operation is performed in which the blade 82 scrapes off ink from the nozzle surface 14F. FIG. 7 shows the blade 82 positioned at the wiping operation start position. FIG. 8 shows the blade 82 positioned at the wiping operation end position.

[0045] [Receiving member] 13 and 14 are perspective views showing the receiving member 84. The receiving member 84 is supported by the waste liquid tray 81 (see FIGS. 7, 8, and 10). The receiving member 84 is provided at the front end of each of the three recesses 81U. The receiving member 84 includes a front portion 84F facing the front surface of the blade 82, a ceiling portion 84T provided rearward from the upper end of the front portion 84F, and sidewall portions 84W provided rearward from both left and right ends of the front portion 84F. In other words, the receiving member 84 is formed in a box shape that is open on the rear and bottom sides.

[0046] When the blade 82 reaches the frontmost part of the recess 81U, the blade 82 is housed in the receiving member 84. At this time, the blade 82 is surrounded from the front, above, and from the left and right sides by the receiving member 84. Note that either the ceiling part 84T or the side wall part 84W may be provided.

[0047] [Cleaning liquid supply unit] Next, the cleaning liquid supply unit 40 will be described. Fig. 15 is a perspective view showing the cleaning liquid supply unit 40 and the blade unit 90. Figs. 16 and 17 are right side views showing the cleaning liquid supply unit 40 and the blade unit 90. Fig. 18 is a perspective view showing the cleaning liquid supply unit 40. Figs. 19 to 22 are perspective views showing cross sections of the cleaning liquid supply unit 40 and the cleaning liquid supply source 13. The cleaning liquid supply unit 40 includes a supply member 41, a link member 42, and a delivery member 44.

[0048] [Supply material] Supply member 41 includes, in order from the rear, a base end portion 51, an intermediate portion 52, and a storage portion 53. The top surface of supply member 41 is flat and rectangular when viewed from above. A portion of parallel surface 11P of head base 11B rearward of nozzle plate 14 faces the top surface of supply member 41 and also serves as push-down portion 11D that pushes down supply member 41. Note that push-down portion 11D may be provided as a member separate from head base 11B.

[0049] Arm support portions 51L protruding left and right are provided on the left and right sides of the base end portion 51, respectively (see FIG. 18). Arm portions 51A protruding forward are provided on the left and right arm support portions 51L, respectively (see FIGS. 16 to 18). A shaft portion 51S protrudes from the left side surface of the left arm portion 51A and the right side surface of the right arm portion 51A. Bosses 51B are provided at the rear of the left and right shaft portions 51S.

[0050] The thickness of the intermediate portion 52 in the up-down direction is thinner than that of the base end portion 51 (see FIGS. 16 to 18). The lower surface of the intermediate portion 52 is flat. The lower surface of the storage portion 53 has a first inclined surface 531 and a second inclined surface 532 provided forward of the first inclined surface 531. The first inclined surface 531 is inclined so that the front side is lower than the rear side (see FIGS. 16 and 17). The second inclined surface 532 is inclined so that the front side is higher than the rear side. The first inclined surface 531 is continuous with the lower surface of the intermediate portion 52. Therefore, a space (hereinafter referred to as a non-contact space 52U) that is larger than the space below the storage portion 53 is formed below the intermediate portion 52.

[0051] The storage unit 53 has a hollow structure having a storage space 53V that stores the cleaning liquid (see FIGS. 16 and 17). A cleaning liquid holding member 53H (see FIGS. 21 and 22), such as a mesh member or a porous member, that holds the cleaning liquid is preferably provided within the storage space 53V. An inlet 53N (see FIGS. 15, 21, and 22) for taking in the cleaning liquid is provided on the upper surface of the storage unit 53. An outlet 53E (see FIGS. 16 and 17) for discharging the cleaning liquid is provided on the lower surface of the storage unit 53. The thickness of the front end of the storage unit 53 in the vertical direction (the distance from the front end of the second inclined surface 532 to the upper surface) is slightly greater than the distance from the lower surface of the head base 11B to the nozzle surface 14F. An opening 53A that penetrates in the front-rear direction is provided at the rear end of the storage space 53V. The opening 53A is provided at the upper end of the first inclined surface 531.

[0052] [Link member] The link members 42 are provided on the left and right sides of the supply member 41 (FIGS. 15 to 18). The lower portions of the left and right link members 42 are connected using a shaft 42S (see FIG. 18) whose longitudinal direction is the left-right direction. The shaft 42S is rotatably supported in a recess 81U of the waste liquid tray 81. Specifically, the waste liquid tray 81 has notches 81K formed downward from the upper end portions of the left and right side walls of the recess 81U (see FIGS. 19 and 20). Both left and right ends of the shaft 42S are supported by the notches 81K. The link members 42 are swingable around the shaft 42S.

[0053] A shaft hole 42H into which the shaft portion 51S of the supply member 41 is inserted is provided at the top of the left and right link members 42 (see FIGS. 16 to 18). The shaft hole 42H is located forward of the shaft 42S. A long hole 42L into which the boss 51B of the supply member 41 is inserted is provided behind the shaft hole 42H. The supply member 41 can swing relative to the link members 42 around the shaft portion 51S within the longitudinal range of the long hole 42L (see FIGS. 16 and 17).

[0054] [Second biasing member] The link member 42 is provided with a second biasing member 43 (see FIG. 18). Specifically, the second biasing member 43 is a torsion coil spring wound around the shaft 42S. One end of the second biasing member 43 is engaged with the holder 92, and the other end is engaged with the link member 42 (see FIGS. 16 and 17). The second biasing member 43 biases the link member 42 in the clockwise direction in FIGS. 16 and 17. In other words, the second biasing member 43 biases the supply member 41 in a direction approaching the inkjet head 12. The second biasing member 43 may be a leaf spring, a compression coil spring, or the like.

[0055] [Transfer materials] The transfer member 44 is joined to the second inclined surface 532. The transfer member 44 has the same inclination angle as the second inclined surface 532. The transfer member 44 is a rectangular sheet-like member made of resin or the like, and is flexible. The front end of the transfer member 44 protrudes forward beyond the front end of the storage section 53. The transfer member 44 is provided with a discharge opening 44A at a position corresponding to the discharge opening 53E of the storage section 53 (see FIG. 18).

[0056] [Cleaning fluid supply source] The cleaning liquid supply source 13 (see FIG. 7) supplies the cleaning liquid to the supply member 41. The cleaning liquid is a liquid whose main component is water. The cleaning liquid supply source 13 includes a tank 13T, a pump 13P, a supply flow path 13C, and a support plate 13B. The cleaning liquid is stored in the tank 13T. The supply flow path 13C branches into three paths downstream of the pump 13P. Each of the branched supply flow paths 13C is connected to a valve 13V. The valves 13V are, for example, check valves. The three valves 13V are respectively disposed above the inlets 53N of the supply member 41. The supply flow paths 13C and the valves 13V are supported by the support plate 13B. The valves 13V penetrate the support plate 13B, and outlets 13K of the valves 13V protrude from the lower surface of the support plate 13B.

[0057] Supply source lifting devices 13L (see FIG. 7) are provided in front of and behind support plate 13B. Supply source lifting devices 13L are configured, for example, with a cam mechanism, a ball screw, or the like. Supply source lifting devices 13L raise and lower support plate 13B between a supply position (see FIG. 23(A)) and a retracted position (see FIG. 23(B)). The supply position is a position where outlet 13K of valve 13V is inserted into inlet 53N (see FIGS. 20 and 22). The retracted position is a position where outlet 13K of valve 13V is retracted upward from inlet 53N (see FIGS. 19 and 21).

[0058] On the lower surface of the support plate 13B, downwardly protruding convex portions 13BT are provided at positions corresponding to the protruding portions 91P of the protruding member 91 (see FIGS. 19 to 22). In addition, on the lower surface of the support plate 13B, downwardly protruding convex portions 13BS are provided on the left and right sides of the valve 13V (see FIGS. 19 and 20).

[0059] [Overview of wipe unit operation] Next, an overview of the operation of the wipe unit 32 will be described. Fig. 24 is a plan view showing the operation of the wipe unit 32. Figs. 25 to 30 are right side views showing the operation of the wipe unit 32. Note that an overview of the operation of the wipe unit 32 will be described here, and the operations of the protruding member 91 and the supply member 41 will be described later.

[0060] The following description will be given assuming that the state shown in Figures 23(A) and 24(A) is the initial state. In the initial state, the head unit 11 is located at the image forming position (see Figure 23(A)), the cap unit 31 is located at the home position, the wiping unit 32 is located at the home position and the contact position, and the cleaning liquid supply source 13 is located at the supply position. The blade 82 is located at the wiping operation start position (see Figure 24(A)). A predetermined amount of cleaning liquid is supplied to the cleaning liquid supply unit 40 from the cleaning liquid supply source 13. The control unit 2 executes the following process at a predetermined timing. The predetermined timing is, for example, a timing when an increase in the viscosity of the ink in the nozzle 14N is expected, specifically, when a predetermined period of time has passed since an image formation job was executed.

[0061] First, the control unit 2 operates the head lifting device 11L to raise the head unit 11 to the retracted position (see FIG. 23(B)). The control unit 2 also operates the supply source lifting device 13L to raise the cleaning liquid supply source 13 to the retracted position.

[0062] Next, the control unit 2 operates the cap slide device 34 to slide the cap unit 31 to the maintenance position (see Figures 23(C), 24(B), and 25). At this time, since the wipe unit 32 is placed on the cap unit 31, the wipe unit 32 also slides to the maintenance position together with the cap unit 31. Next, the control unit 2 operates the head lifting device 11L to lower the head unit 11 to a height for performing the wiping operation (hereinafter referred to as the wipe position) (see Figures 23(D) and 26).

[0063] Next, the control unit 2 causes the inkjet head 12 to eject a predetermined amount of ink, and then actuates the carriage drive device 36 to slide the blade 82 forward along the nozzle surface 14F (see FIGS. 24(C), 27, 28, and 29). The blade 82 scrapes off the cleaning liquid F bulging out of the outlet 44A (see FIG. 27) and moves forward along the nozzle surface 14F (see FIGS. 28 and 29). On the nozzle surface 14F, the residual ink K is diluted by the cleaning liquid F carried by the blade 82. The waste liquid W containing the residual ink K and cleaning liquid F is scraped off by the blade 82 and falls into the recess 81U.

[0064] Next, the control unit 2 operates the head lifting device 11L to raise the head unit 11 to the retracted position (see Figures 23(C) and 30). Next, the control unit 2 operates the carriage driving device 36 to return the blade 82 to the wiping operation start position (see Figures 24(B) and 25). Next, the control unit 2 operates the cap sliding device 34 to slide the cap unit 31 and the wipe unit 32 to the home position (see Figures 23(B) and 24(A)).

[0065] Next, the control unit 2 operates the wiper lifting device 35 to raise the wiper unit 32 to the separated position (see FIG. 23(E)). Next, the control unit 2 operates the cap slide device 34 to slide the cap unit 31 to the maintenance position (see FIGS. 23(F) and 24(D)). At this time, since the wiper unit 32 is separated from the cap unit 31, the wiper unit 32 remains in the home position, and only the cap unit 31 slides to the maintenance position.

[0066] Next, the control unit 2 activates the head lifting device 11L to lower the head unit 11 to a height where the nozzle surface 14F contacts the cap 72 (hereinafter referred to as the cap position) (see FIG. 23(G)). In this way, the cap 72 is attached to the nozzle surface 14F.

[0067] When an image forming job is to be executed, the control unit 2 actuates the head lifting device 11L to raise the head unit 11 to the retracted position (see FIG. 23(F)), actuates the cap slide device 34 to slide the cap unit 31 to the home position (see FIG. 23(E)), and actuates the wiper lifting device 35 to lower the wiper unit 32 to the contact position (see FIG. 23(B)). Then, the control unit 2 actuates the head lifting device 11L to lower the head unit 11 to the image forming position (see FIG. 23(A)), and executes the image forming job.

[0068] [Movement of the ejecting member and the supplying member] Next, the operation of the protruding member 91 and the supply member 41 will be described. Fig. 16 shows a state in which the protruding member 91 and the supply member 41 are not pressed down (hereinafter referred to as the non-pressed state). On the other hand, Fig. 17 shows a state in which the protruding member 91 is pressed down by the parallel surface 11P or the convex portion 13BT, and the supply member 41 is pressed down by the pressing portion 11D or the convex portion 13BS (hereinafter referred to as the pressed state). The first biasing member 93 biases the protruding member 91 in the counterclockwise direction in Figs. 16 and 17. The second biasing member 43 biases the link member 42 in the clockwise direction.

[0069] [Unpressed state] The non-pressed state occurs when the wiping unit 32 is located at the home position and the cleaning liquid supply source 13 is raised to the retracted position (see FIGS. 19, 21, 23(B), (E), (F), and (G)). The non-pressed state also occurs when the wiping unit 32 is located at the maintenance position and the head unit 11 is raised to the retracted position (see FIG. 23(C)).

[0070] [Pressed state] On the other hand, when the wiping unit 32 is located at the home position and the cleaning liquid supply source 13 is lowered to the supply position, the state is the pressed state (see FIGS. 20, 22, and 23(A)). Specifically, when the cleaning liquid supply source 13 is lowered (see FIGS. 17, 20, and 22) from the non-pressed state (see FIGS. 16, 19, and 21), the convex portion 13BT presses down the protruding portion 91P against the first biasing member 93, and the convex portion 13BS presses down the supply member 41 against the second biasing member 43. At this time, the outlet 13K of the valve 13V is inserted into the inlet 53N of the supply member 41 (see FIG. 22), and the cleaning liquid can be supplied from the cleaning liquid supply source 13 to the cleaning liquid supply unit 40.

[0071] The pressed state also occurs when the wiping unit 32 is in the maintenance position and the head unit 11 is lowered to the wiping position (see FIG. 23D). When the head unit 11 is lowered (see FIG. 17) from the non-pressed state (see FIG. 16), the parallel surface 11P presses down the protruding portion 91P against the first biasing member 93, and the pressing portion 11D presses down the supply member 41 against the second biasing member 43.

[0072] When transitioning from the non-pressed state to the pressed state, the protrusion 91P is pressed down, causing the blade 82 to swing clockwise. Therefore, the inclination angle β of the front surface of the blade 82 relative to the vertical line V in the pressed state (see FIG. 17) is larger than the inclination angle α in the non-pressed state (see FIG. 16). Furthermore, the supply member 41 is pressed down, causing the link member 42 to swing counterclockwise. Therefore, in the pressed state, the supply member 41 moves forward and downward compared to the non-pressed state.

[0073] Looking at the tip of blade 82, in the non-pressed state, the tip of blade 82 is located below first inclined surface 531 of supply member 41. On the other hand, in the pressed state, the tip of blade 82 moves backward and downward, and supply member 41 moves forward and downward relatively. However, since the tip of blade 82 enters non-contact space 52U below intermediate portion 52 of supply member 41, interference between blade 82 and supply member 41 is avoided.

[0074] [Wipe Action] Next, the wiping operation will be described in detail. When the head unit 11 rises to the retracted position and the wiping unit 32 slides to the maintenance position (see FIGS. 23(C), 24(B), and 25), the protruding member 91 and the supply member 41 are in a non-pressed state (see FIG. 16). At this time, the rear end surface of the nozzle plate 14 and the front end surface of the supply member 41 are separated in the front-rear direction by a distance D (see FIG. 25). Cleaning liquid F swells from the discharge port 44A of the delivery member 44 (see FIG. 18) (see FIG. 25). Residual ink K adheres to the nozzle surface 14F (see FIG. 25).

[0075] Next, the control unit 2 activates the head lifting device 11L to lower the head unit 11 to the wiping position (see FIGS. 23(D) and 26). Then, the parallel surface 11P presses down the protruding member 91 and the supply member 41, causing them to enter a pressed-down state (see FIG. 17). At this time, the blade 82 swings from the inclination angle α to the inclination angle β. Furthermore, the supply member 41 moves forward, reducing the distance between the front end surface of the supply member 41 and the rear end surface of the nozzle plate 14. At this time, the front end surface of the supply member 41 may come into contact with the rear end surface of the nozzle plate 14. Furthermore, the delivery member 44 moves below the nozzle surface 14F, and at least the front end of the upper surface of the delivery member 44 comes into contact with the nozzle surface 14F, eliminating the step between the second inclined surface 532 and the nozzle surface 14F.

[0076] Next, the control unit 2 causes the inkjet head 12 to eject a predetermined amount of ink. This action causes the ink, whose viscosity has increased, to be discharged from the nozzles 14N. Next, the control unit 2 activates the carriage drive device 36 to slide the blade 82 forward along the nozzle surface 14F (see FIG. 24C). The blade 82 scrapes off the cleaning liquid F bulging out of the outlet 44A (see FIG. 27), moves along the lower surface of the delivery member 44 to the nozzle surface 14F, and then advances along the nozzle surface 14F (see FIG. 28). Note that in FIGS. 27 and 28, the tip of the blade 82 overlaps the supply member 41 and the nozzle plate 14, but in reality, the tip of the blade 82 is bent backward.

[0077] When the blade 82 advances along the nozzle surface 14F, the blade 82 advances with the protruding member 91 in contact with the parallel surface 11P, so the inclination angle of the blade 82 is maintained constant. Therefore, the blade 82 is pressed against the nozzle surface 14F with a constant load. Furthermore, the blade 82 is pressed against the nozzle surface 14F mainly by the elastic force of the first biasing member 93. The elastic force of the first biasing member 93 is adjusted to minimize the deflection of the blade 82.

[0078] On the nozzle surface 14F, the residual ink K is diluted by the cleaning liquid F carried by the blade 82. The waste liquid W containing the residual ink K and cleaning liquid F is scraped off by the blade 82 and flows down along the front and rear surfaces of the blade 82. The waste liquid W that flows down along the rear surface of the blade 82 passes through the through-hole 91A of the protruding member 91 and falls into the recessed portion 81U (see FIG. 11). The waste liquid W that flows down along the front surface of the blade 82 passes through the front surface of the fixed member 94, is collected along the lower edge of the fixed member 94 and the lower edge of the protruding member 91, and falls into the recessed portion 81U.

[0079] Concurrently with the blade 82 passing the front end of the nozzle surface 14F (see FIG. 29), the control unit 2 operates the head lifting device 11L to raise the head unit 11 to the retracted position (see FIG. 30). At this time, the head base 11B also rises, causing the protruding member 91 and the supply member 41 to return to their unpressed states. Furthermore, the blade 82 moves away from the nozzle surface 14F, thereby eliminating the deflection deformation of the blade 82. This action causes the waste liquid W to be released from the blade 82 toward the receiving member 84. The waste liquid W received by the receiving member 84 flows downward along the inner surface of the receiving member 84 and falls into the recess 81U.

[0080] If a configuration for changing the inclination angle of the blade 82 (such as the protruding member 91, the holder 92, or the first biasing member 93) were not provided, the blade 82 would be pressed against the nozzle face 14F solely by the elastic force caused by the bending deformation of the blade 82 itself. Therefore, when the tip of the blade 82 passes the front end of the nozzle face 14F, the bending of the blade 82 would suddenly be released, which could cause the waste liquid W to scatter. In contrast, in this embodiment, the bending of the blade 82 is suppressed to a smaller amount than when a configuration for changing the inclination angle of the blade 82 is not provided. Furthermore, because the inclination of the blade 82 is restored in parallel with the release of the bending deformation, the waste liquid W is mainly released forward and received by the receiving member 84, thereby suppressing the scattering of the waste liquid W.

[0081] [Cleaning the blades and waste tray] 31 to 37 are cross-sectional views showing the cleaning operation of the blade 82 and the waste liquid tray 81. The initial state will be described as a state in which the cap 72 is attached to the nozzle surface 14F, the wiping unit 32 is in the home position, and the cleaning liquid supply source 13 is in the retracted position (see FIG. 23(G) and FIG. 31). The cleaning liquid supply source 13 descends to the supply position and is in the depressed state (see FIG. 32). At this time, the outlet 13K of the valve 13V is inserted into the inlet 53N, and a predetermined amount of cleaning liquid F is stored in the storage space 53V (see FIG. 33). The cleaning liquid F swells from the outlet 53E onto the second inclined surface 532 (see FIG. 34).

[0082] Next, blade 82 moves forward while bending (see FIG. 35) and scrapes off the bulging cleaning liquid F (see FIG. 36). At this time, the tip of blade 82 rubs against second inclined surface 532, the ink adhering to blade 82 is diluted by the cleaning liquid F, and waste liquid W containing ink and cleaning liquid F falls into waste liquid tray 81. Next, cleaning liquid supply source 13 rises to the retracted position, the tip of blade 82 moves away from second inclined surface 532, and the blade 82 recovers from its bending (see FIG. 37). Finally, blade 82 retracts, returning to the position shown in FIG. 31.

[0083] FIG. 38 is a diagram showing the state in which cleaning liquid F flows out from opening 53A. When cleaning liquid F reaches opening 53A, excess cleaning liquid F flows out from opening 53A. If opening 53A were not provided, excess cleaning liquid F would overflow from intake port 53N and contaminate the interior of the inkjet recording apparatus 1. However, in this embodiment, excess cleaning liquid F flows out from opening 53A, and therefore supply member 41 and blade 82 prevent the cleaning liquid F from scattering, making it less likely to contaminate the interior of the apparatus. Note that cleaning of blade 82 and waste liquid tray 81 may be promoted by intentionally supplying a large amount of cleaning liquid F to supply member 41 and causing cleaning liquid F to flow out from opening 53A.

[0084] The maintenance device 30 according to the present embodiment described above includes the blade 82 that performs a wiping operation along the nozzle surface 14F of the inkjet head 12, the supply member 41 that is provided above the blade 82 at the starting point side of the wiping operation and that supplies cleaning liquid F to the blade 82 by contacting the tip of the blade 82, the link member 42 that supports the supply member 41 and swings around a shaft 42S provided below the supply member 41, and the link member 42 that is provided on the rear side in the direction of progression of the wiping operation. The cleaning liquid supply source 13 is provided above the supply member 41 and supplies cleaning liquid F to the supply member 41. A supply source elevating device 13L elevates the cleaning liquid supply source 13. When the cleaning liquid supply source 13 is elevated, the supply member 41 moves upward away from the blade 82. The cleaning liquid supply source 13 pushes the supply member 41 forward in the direction of travel against the second elevating member 43, thereby moving the supply member 41 to a position where it can contact the blade 82 during the wiping operation. According to this embodiment, the blade 82 can be cleaned using the cleaning liquid supply source 13 and the supply member 41 for cleaning the nozzle surface 14F. This allows the maintenance device 30 to add a function for cleaning the blade 82 without increasing its size. When the cleaning liquid supply source 13 is elevated, the supply member 41 moves upward away from the blade 82, thereby preventing deformation of the blade 82 due to interference with the supply member 41.

[0085] Furthermore, according to the maintenance device 30 of this embodiment, an intake port 53N for taking in cleaning liquid F from the cleaning liquid supply source 13 is provided on the top surface of the supply member 41, and an opening 53A for letting out excess cleaning liquid F is provided on the side of the supply member 41. If opening 53A were not provided, there is a risk that cleaning liquid F would overflow from intake port 53N and contaminate the inside of the apparatus, but according to this embodiment, scattering of cleaning liquid F is suppressed, so the inside of the inkjet recording apparatus 1 is less likely to be contaminated.

[0086] Furthermore, according to the maintenance device 30 of this embodiment, the opening 53A is provided above the blade 82 in standby, and the blade 82 is cleaned by the cleaning liquid F flowing out from the opening 53A.

[0087] Furthermore, the inkjet recording apparatus 1 according to this embodiment includes the maintenance device 30 and the inkjet head 12. According to this embodiment, the inkjet recording apparatus 1 can be made space-saving. [Explanation of symbols]

[0088] 1 Inkjet recording device 12 Inkjet head 13 Cleaning fluid supply source 13L supply source lifting device 14F nozzle surface 30 Maintenance Equipment 41 Supply material 42 Link member 43 Second biasing member (biasing member) 53A opening 53N intake 82 Blade

Claims

1. a blade that performs a wiping action along the nozzle surface of the inkjet head; a supply member provided above the blade at a starting point of the wiping operation, the supply member contacting a tip of the blade to supply cleaning liquid to the blade; a link member that supports the supply member and swings around a shaft provided below the supply member; a biasing member that biases the link member rearward in the direction of progression of the wiping operation; a cleaning liquid supply source provided above the supply member and supplying cleaning liquid to the supply member; a supply source lifting device that lifts and lowers the cleaning liquid supply source; When the cleaning liquid supply source is raised, the supply member moves upward away from the blade, a cleaning liquid supply source that pushes the supply member forward in the direction of travel against the biasing member, thereby moving the supply member to a position where it can come into contact with the blade during the wiping operation.

2. an intake port for taking in cleaning liquid from the cleaning liquid supply source is provided on an upper surface of the supply member; 2. The maintenance device according to claim 1, wherein an opening is provided on a side surface of the supply member to allow excess cleaning liquid to flow out.

3. the opening is provided above the blade when it is in standby; The maintenance device according to claim 2, wherein the blade is cleaned by the cleaning liquid flowing out from the opening.

4. The maintenance device according to any one of claims 1 to 3; An inkjet recording apparatus comprising the inkjet head.

Images