Inkjet recording apparatus

Abstract

To provide an inkjet recording apparatus capable of suppressing an increase in size of the apparatus in a height direction and suitably maintaining ink ejection performance of a recording head.SOLUTION: The inkjet recording apparatus 1 includes a belt conveyor 41, a recording head 51, a maintenance unit 8, a first movement mechanism 11, and a second movement mechanism 12. The 51a of the ink ejection surface of the recording head 51 is disposed in parallel with the 411a of the conveyance surface of the belt conveyance unit 41. The first movement mechanism 11 moves the recording head 51 in the horizontal direction. The second moving mechanism 12 selectively arranges the maintenance unit 8 at an inserting position between the conveying surface 411a and the ink discharge surface 51a and at a retreating position. The maintenance unit 8 includes a third moving mechanism 13 for moving the cap part 81 in the normal direction of the ink ejection surface 51a and selectively arranging the cap part 81 at a mounting position in contact with the ink ejection surface 51a and a separation position.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to an inkjet recording apparatus. [Background technology]

[0002] Inkjet recording devices, which eject ink onto a recording medium such as a sheet to record an image, are widely used as recording devices such as printers and copiers because they can record high-resolution images. Recently, there has been a demand for inkjet recording devices to be more compact and space-saving, and some devices are configured such that the recording head is tilted relative to the horizontal direction and the ink is ejected at an angle closer to the horizontal than the vertical direction.

[0003] Furthermore, in inkjet recording devices, ink remaining on the ink ejection surface of the recording head can solidify, causing ejection problems. To address this issue, conventional maintenance techniques such as capping and cleaning (wiping) the ink ejection surface are known to prevent ink from solidifying on the ink ejection surface and to remove solidified ink.

[0004] For example, a conventional recording apparatus disclosed in Patent Document 1 has a line head (recording head), a head moving unit, and a maintenance unit. The head moving unit moves the line head between a recording position and a retracted position along a direction inclined relative to the horizontal. The maintenance unit has a cap part that covers the nozzles of the line head and is movable along the recording medium transport direction inclined relative to the horizontal. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent Publication No. 2021-121478 Summary of the Invention [Problem to be solved by the invention]

[0006] However, in the conventional technology, the line head needs to be moved upward at an angle relative to the horizontal direction during maintenance, which requires the device to be configured to be taller, resulting in an increase in the device size. There was a concern that the increased height of the device, if an operating unit is provided at the top, would make it difficult for users to operate. Furthermore, there was a concern that reducing the storage space for recording media at the bottom of the device in order to prevent the device from becoming taller, would reduce the convenience of the device.

[0007] Furthermore, if the line head is moved horizontally, it may be difficult to properly align the line head and cap with the cap when the cap is tilted relative to the horizontal. Furthermore, if the line head is moved horizontally and the cap is attached when the cap is tilted relative to the horizontal, there is a risk that the cap may rub against the nozzle surface and come into contact with the nozzle surface, which may damage the nozzle surface. This may affect the ink ejection performance of the recording head.

[0008] The present invention has been made in consideration of the above points, and aims to provide an inkjet recording device that prevents the device from becoming too large in height and that can maintain the ink ejection performance of the recording head in an optimal manner. [Means for solving the problem]

[0009] In order to solve the above problems, the inkjet recording apparatus of the present invention includes a transport unit, a recording head, a maintenance unit, a first moving mechanism, and a second moving mechanism. The transport unit has a transport surface that transports the recording medium and is arranged inclined relative to the horizontal direction. The recording head has an ink ejection surface where nozzles that eject ink onto the recording medium are opened, and the ink ejection surface is arranged parallel to and facing the transport surface of the transport unit. The maintenance unit is detachable from the ink ejection surface of the recording head. The first moving mechanism moves the recording head horizontally to selectively position it between a recording position close to the transport unit and a maintenance position away from the recording position. The second moving mechanism moves the maintenance unit parallel to the ink ejection surface and selectively positions it between an insertion position between the transport surface and the ink ejection surface and a retracted position retracted from the insertion position. The maintenance unit includes a base unit, a maintenance unit, and a third moving mechanism. The maintenance unit is movably supported by the base unit and is detachable from the ink ejection surface. The third movement mechanism moves the maintenance unit in a normal direction to the ink ejection surface to selectively position the maintenance unit at an attached position in contact with the ink ejection surface and at a separated position separated from the ink ejection surface. [Effects of the Invention]

[0010] According to the configuration of the present invention, when the print head is moved from the printing position to the maintenance position, the print head is moved horizontally, so the device does not need to be constructed to be any taller than necessary. This prevents the inkjet printing device from becoming larger in height. Furthermore, when the maintenance unit is attached to the ink ejection surface, the maintenance unit is moved in the normal direction to the ink ejection surface, so contact with the ink ejection surface of the maintenance unit, which is designed to rub against the ink ejection surface, can be prevented. This prevents damage to the ink ejection surface. This makes it possible to maintain the ink ejection performance of the print head in an optimal state. [Brief explanation of the drawings]

[0011] [Figure 1]1 is a schematic cross-sectional side view of an inkjet recording apparatus according to an embodiment of the present invention. [Figure 2] FIG. 2 is a side view of the periphery of a recording unit of the inkjet recording apparatus of FIG. [Figure 3] 3 is a side view of the recording unit and its surroundings in FIG. 2, showing a state in which a maintenance unit is placed at an insertion position relative to a recording head. FIG. [Figure 4] FIG. 4 is a side view of the recording unit and its surroundings in FIG. 3, showing a state in which a maintenance unit is attached to a recording head. [Figure 5] FIG. 4 is a cross-sectional side view of the maintenance unit of FIG. 3. [Figure 6] 6 is a cross-sectional side view of the maintenance unit in FIG. 5, showing a state in which the maintenance unit is attached to the recording head. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, an embodiment of the present invention will be described with reference to the drawings, but the present invention is not limited to the following.

[0013] 1 is a schematic cross-sectional front view of an inkjet recording apparatus 1 according to an embodiment. The inkjet recording apparatus 1 is, for example, an inkjet recording printer. As shown in FIG. 1, the inkjet recording apparatus 1 includes an apparatus main body 2, a sheet supply unit 3, a sheet conveying unit (conveying unit) 4, a recording unit 5, a drying unit 6, and a control unit 7.

[0014] The sheet supply unit 3 is disposed, for example, at the bottom of the apparatus main body 2. The sheet supply unit 3 stores a plurality of sheets (recording media) S, and separates and feeds the sheets S one by one during recording.

[0015] The sheet conveying unit 4 is disposed above and downstream in the sheet conveying direction of the sheet supplying unit 3. The sheet conveying unit 4 conveys the sheet S sent out from the sheet supplying unit 3. The sheet conveying unit 4 conveys the sheet S to the recording unit 5 and the drying unit 6, and then discharges the sheet S to the sheet discharge unit 21 after recording and drying.

[0016] The sheet conveying unit 4 includes a belt conveying unit 41. The belt conveying unit 41 has an endless conveying belt 411. The conveying belt 411 is disposed so that a conveying surface 411a that conveys the sheet S is inclined with respect to the horizontal direction. In this embodiment, the conveying belt 411 is inclined at an angle of 60 degrees with respect to the horizontal direction, for example. The conveying belt 411 is disposed opposite the recording unit 5. The belt conveying unit 41 adsorbs and holds the sheet S in an area of ​​the outer circumferential surface of the conveying belt 411 that faces the recording unit 5, and conveys the sheet S.

[0017] The recording unit 5 includes a recording head 51. The recording head 51 is located downstream of the sheet supply unit 3 in the sheet conveying direction and is disposed opposite the belt conveying unit 41. The recording head 51 has an ink ejection surface 51a. The ink ejection surface 51a is disposed parallel to and opposite the conveying surface 411a of the conveying belt 411. In other words, the ink ejection surface 51a faces the sheet S, which is attracted to and held on the conveying surface 411a of the conveying belt 411 and conveyed, and is disposed at a predetermined distance from the conveying belt 411. That is, the ink ejection surface 51a is disposed at an angle with respect to the horizontal direction (for example, at an angle of 60 degrees). A large number of ink ejection nozzles (not shown) are opened and arranged on the ink ejection surface 51a.

[0018] Although one recording head 51 is depicted in FIG. 1, in this embodiment, the recording unit 5 includes a recording head 51 corresponding to each of the four colors, black, cyan, magenta, and yellow. The recording heads 51 for the four colors are arranged in a sheet width direction (in FIG. 1) perpendicular to the sheet conveying direction. The four color recording heads 51 are arranged parallel to each other in the direction perpendicular to the paper surface. Each of the four color recording heads 51 is supplied with four color inks stored in ink containers 52 provided outside the recording unit 5.

[0019] The inkjet recording apparatus 1 also includes an ink container 52 and an ink supply system 53. The ink container 52 includes ink containers 52K, 52C, 52M, and 52Y corresponding to four colors, black, cyan, magenta, and yellow, respectively. The ink containers 52K, 52C, 52M, and 52Y store ink of each color, black, cyan, magenta, and yellow.

[0020] The ink supply system 53 is composed of an ink supply path, a pump, an on-off valve, a check valve, etc. (none of which are shown). The ink supply system 53 supplies ink of four colors (black, cyan, magenta, and yellow) stored in ink containers 52K, 52C, 52M, and 52Y individually to the recording heads 51 corresponding to each color, based on a control signal from the control unit 7. The recording unit 5 sequentially ejects ink from the four color recording heads 51 toward the sheet S transported by the transport belt 411, and records a full-color image or a monochrome image on the sheet S.

[0021] The drying unit 6 is disposed above and downstream in the sheet conveying direction of the recording unit 5. The sheet S, on which an ink image has been recorded in the recording unit 5, has the ink dried in the drying unit 6 while being conveyed by the sheet conveying unit 4. The sheet S, on which the image has been recorded and dried and printing is complete, is discharged to a sheet discharge unit 21 provided on the top surface of the device main body 2.

[0022] The control unit 7 includes a CPU, an image processing unit, a memory unit, and other electronic circuits and electronic components (none of which are shown). The CPU controls the operation of each component provided in the inkjet recording apparatus 1 based on control programs and data stored in the memory unit to perform processing related to the functions of the inkjet recording apparatus 1. The sheet supply unit 3, the sheet conveying unit 4, the recording unit 5, and the drying unit 6 each receive individual commands from the control unit 7 and perform recording on the sheet S in cooperation with each other. The memory unit is configured by a combination of a non-volatile storage device such as a program ROM (Read Only Memory) or a data ROM, and a volatile storage device such as a RAM (Random Access Memory).

[0023] The inkjet recording apparatus 1 also includes a maintenance unit 8. The maintenance unit 8 is detachable from the ink ejection surface 51a of the recording head 51. When maintenance processing of the recording head 51 is not being performed, the maintenance unit 8 is placed in a retracted position below the recording head 51, as shown in FIG.

[0024] In the inkjet recording device 1, maintenance processing of the recording head 51 is performed at predetermined times. This maintenance processing of the recording head 51 is performed, for example, when recording starts after a long period of inactivity or between recording operations. When performing maintenance processing of the recording head 51, the control unit 7 causes the moving mechanism described below to move the maintenance unit 8 to an insertion position between the conveyance surface 411a of the conveyor belt 411 and the ink ejection surface 51a of the recording head 51 (the position indicated by the two-dot chain line in FIG. 1, see FIG. 3).

[0025] The maintenance unit 8 includes, for example, a cap portion (maintenance portion) 81. The cap portion 81 is attached to the ink ejection surface 51a when starting recording after a long period of inactivity or between recording operations in order to prevent drying of the ink ejection surface 51a and inside the nozzles of the recording head 51 and to remove thickened ink, solidified ink, foreign matter, etc. The cap portion 81 is formed in a concave shape that covers the ink ejection surface 51a. The cap portion 81 is detachable from the ink ejection surface 51a. When the cap portion 81 is placed in an attachment position that covers the ink ejection surface 51a, a closed space is formed between the ink ejection surface 51a and the cap portion 81.

[0026] In the maintenance process using the cap portion 81, for example, a suction purge process is performed in which the suction pump 82 sucks the closed space between the ink ejection surface 51a and the cap portion 81, forcibly sucking ink from all the nozzles of the recording head 51, in preparation for the next recording operation. The ink sucked into the cap portion 81 from the nozzles (purged ink) is discharged to the outside of the cap portion 81 by the suction pump 82, and then collected in a waste ink tank 83 via a waste ink recovery flow path (not shown). Also, a wiping process may be performed in which a wiper is used to carry cleaning liquid to the ink ejection surface 51a and wipe it away.

[0027] Next, the movement mechanism of the maintenance unit 8 will be described with reference to Figures 2, 3, and 4. Figure 2 is a side view of the recording unit 5 and its periphery of the inkjet recording apparatus 1 of Figure 1. Figure 3 is a side view of the recording unit 5 and its periphery of Figure 2, showing a state in which the maintenance unit 8 is placed at an insertion position relative to the recording head 51. Figure 4 is a side view of the recording unit 5 and its periphery of Figure 3, showing a state in which the maintenance unit 8 is attached to the recording head 51.

[0028] The maintenance unit 8 includes a cap portion (maintenance portion) 81 and a base portion 84. The base portion 84 is supported by a second movement mechanism 12, which will be described later. The base portion 84 is formed in the shape of a rectangular parallelepiped box with an opening on the surface facing the ink ejection surface 51a of the recording head 51, and houses the cap portion 81 inside. The cap portion 81 is supported movably relative to the base portion 84.

[0029] The inkjet recording apparatus 1 includes a first moving mechanism 11, a second moving mechanism 12, and a third moving mechanism 13 for moving the maintenance unit 8.

[0030] The first movement mechanism 11 moves the recording head 51 in the horizontal direction relative to the apparatus main body 2. The first movement mechanism 11 has multiple pairs of first guide rails 111, multiple pairs of first guide pins 112, and a first drive unit (not shown). In this embodiment, the first movement mechanism 11 has two pairs of first guide rails 111 and two pairs of first guide pins 112.

[0031] The two pairs of first guide rails 111 are arranged side by side in the vertical direction along the inclination direction of the ink ejection surface 51a and are fixed to the apparatus main body 2. Each of the pair of first guide rails 111 is arranged facing the recording head 51 on the outer side of one end side and the other end side of the recording head 51 in the sheet width direction (the depth direction of the paper in FIGS. 2, 3, and 4). The first guide rails 111 extend horizontally, in a direction approaching and moving away from the belt conveying unit 41.

[0032] Two pairs of first guide pins 112 are arranged side by side in the vertical direction along the inclination direction of the ink ejection surface 51a and are fixed to the recording head 51. The two pairs of first guide pins 112 are arranged opposite the two pairs of first guide rails 111 in the sheet width direction. Each pair of first guide pins 112 is provided on a side surface of one end side and the other end side of the recording head 51 in the sheet width direction, and protrudes outward in the sheet width direction. The first guide pins 112 are supported by the first guide rails 111 so as to be horizontally movable along the first guide rails 111 arranged opposite each other in the sheet width direction.

[0033] The first drive unit has a drive source such as a motor and a drive mechanism such as a group of gears or a wire and pulley (neither of which are shown). The motor is connected to the recording head 51 via the drive mechanism. When the motor is driven, the first movement mechanism 11 moves the recording head 51 in the horizontal direction along the first guide rail 111. More specifically, the first movement mechanism 11 selectively positions the recording head 51 at a recording position close to the belt conveyance unit 41 (see FIG. 2) and a maintenance position away from the recording position (see FIG. 3).

[0034] According to the above configuration, when the recording head 51 is moved from the recording position to the maintenance position, the recording head 51 is moved horizontally, so the inkjet recording apparatus 1 does not need to be configured to be any taller than necessary. This prevents the inkjet recording apparatus 1 from becoming larger in size in the height direction. This allows the operating unit of the inkjet recording apparatus 1 to be positioned at an appropriate height, improving user operability. Furthermore, it is possible to ensure sufficient storage space for the sheet S below the apparatus, improving the convenience of the apparatus.

[0035] The second movement mechanism 12 moves the maintenance unit 8 parallel to the ink ejection surface 51a of the recording head 51 relative to the apparatus main body 2. The second movement mechanism 12 has a pair of second guide rails 121, a pair of second guide pins 122, and a second drive unit (not shown). In this embodiment, the second movement mechanism 12 has a pair of second guide rails 121 and a pair of second guide pins 122, but may have two or more pairs of second guide rails 121 and pairs of second guide pins 122.

[0036] The pair of second guide rails 121 are fixed to the apparatus main body 2. Each of the pair of second guide rails 121 is disposed on the outer side of one end side and the other end side of the maintenance unit 8 in the sheet width direction, facing the maintenance unit 8. The second guide rails 121 extend in the vertical direction along the inclination direction of the ink ejection surface 51a (the conveyance surface 411a of the conveyance belt 411) in the direction approaching and moving away from the belt conveyance section 41.

[0037] The pair of second guide pins 122 are fixed to the base portion 84 of the maintenance unit 8. The pair of second guide pins 122 are arranged to face the pair of second guide rails 121 in the sheet width direction. Each of the pair of second guide pins 122 is provided on a side surface of one end side and the other end side of the base portion 84 of the maintenance unit 8 in the sheet width direction, and protrudes outward in the sheet width direction. The second guide pins 122 are supported by the second guide rails 121 so as to be movable parallel to the ink ejection surface 51a (transport surface 411a) along the second guide rails 121 arranged to face each other in the sheet width direction.

[0038] The second drive unit has a drive source such as a motor and a drive mechanism such as a group of gears or wires and pulleys (neither of which are shown). The motor is connected to the maintenance unit 8 via the drive mechanism. When the motor is driven, the second movement mechanism 12 moves the maintenance unit 8 parallel to the ink ejection surface 51a (transport surface 411a) along the second guide rail 121. More specifically, the second movement mechanism 12 selectively positions the maintenance unit 8 at an insertion position between the transport surface 411a and the ink ejection surface 51a (see FIG. 3) and a retracted position retracted from the insertion position (see FIG. 2).

[0039] The second movement mechanism 12 retracts the maintenance unit 8 to a retracted position below the recording head 51. This configuration prevents the inkjet recording apparatus 1 from becoming higher than necessary due to the movement of the maintenance unit 8 to the retracted position. This makes it possible to avoid the inkjet recording apparatus 1 becoming larger in size in the height direction.

[0040] The third movement mechanism 13 moves the cap part (maintenance part) 81 in the normal direction of the ink ejection surface 51a relative to the base part 84 of the maintenance unit 8. The third movement mechanism 13 has multiple pairs of third guide rails 131, multiple pairs of third guide pins 132, and a third drive part 133. In this embodiment, the third movement mechanism 13 has two pairs of third guide rails 131 and two pairs of third guide pins 132.

[0041] The two pairs of third guide rails 131 are arranged side by side in the vertical direction along the inclination direction of the ink ejection surface 51a and are fixed to the base portion 84. Each of the pair of third guide rails 131 is arranged facing the cap portion 81 on the outer sides of one end side and the other end side of the cap portion 81 in the sheet width direction. The third guide rails 131 extend in the vertical direction along the normal direction of the ink ejection surface 51a, in a direction approaching and moving away from the ink ejection surface 51a.

[0042] Two pairs of third guide pins 132 are arranged side by side in the vertical direction along the inclination direction of the ink ejection surface 51a and are fixed to the cap portion 81. The two pairs of third guide pins 132 are arranged opposite the two pairs of third guide rails 131 in the sheet width direction. Each pair of third guide pins 132 is provided on a side surface of one end side and the other end side of the cap portion 81 in the sheet width direction, and protrudes outward in the sheet width direction. The third guide pins 132 are supported by the third guide rails 131 so as to be movable parallel to the normal direction of the ink ejection surface 51a along the third guide rails 131 arranged opposite each other in the sheet width direction.

[0043] The third drive unit 133 has a drive source (not shown) such as a motor, and a drive mechanism including a group of gears and a cam member 134 (see FIGS. 5 and 6). FIG. 5 is a cross-sectional side view of the maintenance unit 8 of FIG. 3. FIG. 6 is a cross-sectional side view of the maintenance unit 8 of FIG. 5, showing the state in which the maintenance unit 8 is attached to the recording head 51.

[0044] The cam member 134 is disposed on the inner bottom of the base portion 84, which is formed in the shape of a rectangular parallelepiped box. The cam member 134 is disposed on the opposite side of the cap portion 81 from the ink ejection surface 51a. The cam member 134 comes into contact with the outer surface of the cap portion 81 from the side opposite the ink ejection surface 51a.

[0045] The cam member 134 is connected to the drive source of the third drive unit 133 and receives rotational power from the drive source. The cam member 134 rotates around the axis of a rotation shaft 134x extending in the sheet width direction. The cam member 134 has a long diameter portion and a short diameter portion that have different radial lengths from the central axis of rotation, and the distance from the central axis to the point of contact with the cap portion 81 changes as the cam member 134 rotates.

[0046] As shown in Fig. 5, when the short diameter portion of the cam member 134 faces the cap portion 81, the cap portion 81 is displaced in a direction away from the ink ejection surface 51a and is located at the separated position. Then, when the cam member 134 rotates a predetermined amount from the state shown in Fig. 5 and the long diameter portion of the cam member 134 faces the cap portion 81 as shown in Fig. 6, the cap portion 81 is displaced in a direction approaching the ink ejection surface 51a and is located at the attached position where it comes into contact with the ink ejection surface 51a with a certain pressure applied.

[0047] As described above, when the motor is driven, the third movement mechanism 13 moves the cap portion 81 in the normal direction of the ink ejection surface 51a along the third guide rail 131. In detail, the cam member 134 rotates while in contact with the cap portion 81, and selectively positions the cap portion 81 at an attached position in contact with the ink ejection surface 51a (see FIG. 6) or a spaced position spaced from the ink ejection surface 51a (see FIG. 5).

[0048] According to the above configuration, when the cap portion 81 is attached to the ink ejection surface 51a, the cap portion 81 is moved in the normal direction of the ink ejection surface 51a, which prevents the cap portion 81 from contacting the ink ejection surface 51a, which would otherwise rub against the surface of the ink ejection surface 51a. This prevents damage to the ink ejection surface 51a. This makes it possible to maintain the ink ejection performance of the recording head 51 in an optimal state.

[0049] Furthermore, since the third moving mechanism 13 has a cam member 134 that moves the cap portion 81 between the attached position and the separated position, the cap portion 81 can be easily moved (slid) along the normal direction of the ink ejection surface 51a using rotational power from a drive source such as a motor. Therefore, the cap portion 81 can be moved between the attached position and the separated position with a simple configuration. As a result, the ink ejection performance of the recording head 51 can be maintained in an optimal state.

[0050] As described above, the maintenance unit 8 includes the cap portion 81 as a maintenance part. This prevents the ink jet recording apparatus 1 from becoming taller than necessary when the cap portion 81 is provided to prevent the ink ejection surface 51a and the inside of the nozzles from drying out and to remove thickened ink, solidified ink, foreign matter, and the like.

[0051] Although the embodiments of the present invention have been described above, the scope of the present invention is not limited to these, and various modifications can be made without departing from the spirit of the invention. [Industrial Applicability]

[0052] The present invention can be used in inkjet recording apparatuses. [Explanation of symbols]

[0053] 1. Inkjet recording device 2. Device body 5 Recording section 8 Maintenance Unit 11 First moving mechanism 12 Second movement mechanism 13 Third movement mechanism 41 Belt conveying section (conveying section) 51 Recording head 51a Ink ejection surface 81 Cap section (maintenance section) 84 Base 134 Cam member 411 Conveyor belt 411a Conveying surface S sheet (recording medium)

Claims

1. a conveying unit in which a conveying surface for conveying the recording medium is inclined with respect to the horizontal direction; a recording head having an ink ejection surface on which nozzles for ejecting ink onto the recording medium are formed, the ink ejection surface being disposed in parallel with and facing the transport surface of the transport unit; a maintenance unit detachable from the ink ejection surface of the recording head; a first moving mechanism that moves the recording head in a horizontal direction and selectively positions the recording head at a recording position close to the transport unit and a maintenance position away from the recording position; a second movement mechanism that moves the maintenance unit parallel to the ink ejection surface and selectively positions the maintenance unit at an insertion position between the transport surface and the ink ejection surface and a retracted position retracted from the insertion position; Equipped with The maintenance unit includes: A base portion; a maintenance unit movably supported on the base unit and detachable from the ink ejection surface; a third movement mechanism that moves the maintenance unit in a normal direction to the ink ejection surface, and selectively positions the maintenance unit at an attached position in contact with the ink ejection surface and a spaced position spaced from the ink ejection surface; An inkjet recording apparatus comprising:

2. 2. The inkjet recording apparatus according to claim 1, wherein the second moving mechanism retracts the maintenance unit to the retracted position below the recording head.

3. 2. The inkjet recording apparatus according to claim 1, wherein the third movement mechanism has a cam member that rotates while in contact with the maintenance unit to move the maintenance unit between the attached position and the separated position.

4. 4. The inkjet recording apparatus according to claim 1, wherein the maintenance unit includes a cap portion that covers the ink ejection surface when the ink ejection unit is placed in the mounting position.

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