Liquid dispensing device

Abstract

To make a liquid discharge head accurately movable in a first direction and a second direction.SOLUTION: A liquid discharge device 100 includes a liquid discharge head 1, a first plate 2 holding the liquid discharge head 1, a second plate 3 holding the first plate 2, and a third plate 4 holding the second plate 3. The third plate 4, the second plate 3 and the first plate 2 are laminated in this order. The first plate 2 is disposed so as to be reciprocally movable in a Y direction perpendicular to a lamination direction on the second plate 3, and the second plate 3 is disposed so as to be reciprocally movable in an X direction perpendicular to the lamination direction and the Y direction on the third plate 4.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a liquid ejection device. [Background technology]

[0002] The liquid ejection head ejects liquid from a plurality of nozzle holes onto a desired position on a medium such as a sheet, thereby forming an image on the sheet.

[0003] In addition, in Patent Document 1 (Japanese Patent Laid-Open No. 2007-136254), a liquid ejection head is attached to a head plate via a head holding member. The liquid ejection head can be moved slightly within the plane of the head plate by a pair of piezoelectric element units. Summary of the Invention [Problem to be solved by the invention]

[0004] An object of the present invention is to make it possible to move a liquid ejection head in a first direction and a second direction with high precision. [Means for solving the problem]

[0005] In order to solve the above-mentioned problems, the present invention provides a liquid ejection device including a liquid ejection head, a first holding member that holds the liquid ejection head, a second holding member that holds the first holding member, and a third holding member that holds the second holding member, wherein the third holding member, the second holding member, and the first holding member are stacked in this order, and the first holding member is positioned on the second holding member. ,product the second holding member is provided so as to be reciprocally movable in a first direction perpendicular to the layer direction, and the second holding member is provided so as to be reciprocally movable on the third holding member in a second direction perpendicular to the stacking direction and the first direction. The liquid ejection direction of the liquid ejection head is from the first holding member side to the third holding member side in the stacking direction, and a maintenance mechanism for performing maintenance on the liquid ejection head is further provided on the second holding member. It is characterized by: [Effects of the Invention]

[0006] According to the present invention, the liquid ejection head can be moved with high precision in the first direction and the second direction. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a plan view of a liquid ejection device according to an embodiment of the present invention. [Figure 2] FIG. 2 is a side view of the liquid ejection device of FIG. [Figure 3] 1A and 1B are diagrams illustrating a state in which a liquid is ejected onto a medium by a liquid ejection device. [Figure 4] 4 is a diagram showing a state in which liquid is ejected by the liquid ejection device onto a position on the medium that is different from that shown in FIG. 3. [Figure 5] FIG. 10 is a diagram showing an adjusting plate placed on a first plate. [Figure 6] FIG. 6 is a view showing the first plate of FIG. 5. [Figure 7] FIG. 1 is a plan view showing a liquid ejection device having a plurality of liquid ejection heads. [Figure 8] FIG. 1 is a plan view showing a liquid ejection device equipped with a maintenance mechanism. [Figure 9] FIG. 9 is a side view of the liquid ejection device of FIG. [Figure 10] 9 is a side view showing a liquid ejection device equipped with a maintenance mechanism, different from that in FIG. 8. FIG. [Figure 11] FIG. 2 is a plan view showing a liquid ejection device having a liquid ejection head on a second plate. [Figure 12] FIG. 10 is a plan view showing a liquid ejection device having a liquid ejection head on a third plate. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each drawing, the same or corresponding parts are designated by the same reference numerals, and redundant explanations will be appropriately simplified or omitted.

[0009] 1 and 2 are diagrams showing a liquid ejection device according to one embodiment of the present invention, with FIG. 1 being a plan view and FIG. 2 being a side view. FIG. 2 is a view of the liquid ejection device viewed from below in FIG. 1. The Y direction in FIG. 1 is the main scanning direction as the first direction, and is also the width direction of the media. The X direction is the second direction, which is the sub-scanning direction, or the direction of relative movement of the liquid ejection device with respect to the media. The Z direction is the up-down direction of the liquid ejection device, and is the stacking direction of first to third plates, which will be described later. The X, Y, and Z directions are perpendicular to each other.

[0010] As shown in FIG. 1, the liquid ejection device 100 includes a liquid ejection head 1, a first plate 2 serving as a first holding member, a second plate 3 serving as a second holding member, and a third plate 4 serving as a third holding member. The liquid ejection device 100 also includes, on the second plate 3, a pair of first linear guides 11, a pair of first motors 12, a pair of first couplings 13, a pair of first screw members 14, and a pair of first bearing blocks 15. The liquid ejection device 100 also includes, on the third plate 4, a pair of second linear guides 21, a pair of second motors 22, a pair of second couplings 23, a pair of second screw members 24, and a pair of second bearing blocks 25. Furthermore, as shown in FIG. 2, the liquid ejection device 100 also includes a pair of first nuts 16 and a pair of second nuts 26.

[0011] The third plate 4, second plate 3, and first plate 2 are stacked in this order from top to bottom. The liquid ejection head 1 is provided on the first plate 2. The liquid ejection head 1 has a plurality of nozzle holes on the nozzle surface, which is the surface on the far side of the paper in FIG.

[0012] The first plate 2, the second plate 3, and the third plate 4 are provided with ejection holes 2b, 3b, and 4b, respectively. The ejection holes 2b, 3b, and 4b are through-holes. In this embodiment, paper passes along the bottom side of the third plate 4 at the back of the paper in FIG. 1. Therefore, the direction toward the back of the paper in FIG. 1 is the ejection direction of ink as a liquid. For this reason, the ejection holes 2b, 3b, and 4b are provided to allow the ink ejected from the nozzle holes of the liquid ejection head 1 to pass through. However, contrary to this embodiment, if the ink ejection direction is toward the front of the paper in FIG. 1, these through-holes are not necessary.

[0013] Ejection holes 2b are provided at positions corresponding to the nozzle holes of liquid ejection head 1. Ejection holes 3b are provided in a range that covers the Y-direction movement range of the nozzle holes of liquid ejection head 1. Ejection holes 4b are provided in a range that covers the Y-direction and X-direction movement range of the nozzle holes of liquid ejection head 1.

[0014] As shown in FIG. 2, a pair of guided portions 2a provided on the underside of the first plate 2 engage with a first linear guide 11. The first plate 2 is provided on the second plate 3 via the guided portions 2a and the first linear guide 11. As the guided portions 2a move on the first linear guide 11, the first plate 2 can move in the Y direction (see FIG. 1) relative to the second plate 3. Similarly, a pair of guided portions provided on the underside of the second plate 3 engage with a second linear guide 21. The second plate 3 is provided on the third plate 4 via the guided portions and the second linear guide 21. As the guided portions of the second plate 3 move on the second linear guide 21, the second plate 3 can move in the X direction relative to the third plate 4. As the first plate 2 moves in the Y direction and the second plate 3 moves in the X direction, the liquid ejection head 1 moves in the Y direction and the X direction relative to the third plate 4.

[0015] As shown in FIG. 2 , a second nut 26 fixed to the underside of the second plate 3 is threadedly engaged with a second screw member 24 on the third plate 4. A second motor 22 is provided at one end of the second screw member 24 with a second coupling 23 interposed therebetween. The other end of the second screw member 24 is supported by a second bearing block 25. Similarly, a first nut 16 fixed to the underside of the first plate 2 is threadedly engaged with a first screw member 14 provided on the second plate 3. A first motor 12 is provided at one end of the first screw member 14 with a first coupling 13 interposed therebetween. The other end of the first screw member 14 is supported by a first bearing block 15.

[0016] The driving force of the second motor 22 rotates the second screw member 24. The rotation of the second screw member 24 causes the second nut 26 to move in the X direction along the male thread portion of the second screw member 24. In other words, a force in the X direction is applied to the second plate 3 via the second nut 26, and the second plate 3 moves in the X direction on the second linear guide 21 as described above. Similarly, the driving force of the first motor 12 rotates the first screw member 14. The rotation of the first screw member 14 causes the first nut 16 to move in the Y direction along the male thread portion of the first screw member 14. In other words, a force in the X direction is applied to the first plate 2 via the first nut 16, and the first plate 2 moves in the Y direction on the first linear guide 11 as described above.

[0017] As described above, in this embodiment, the second plate 3 can be moved in the X direction relative to the third plate 4, and the first plate 2 can be moved in the Y direction relative to the second plate 3. In other words, the liquid ejection head 1 can be moved in a predetermined direction, either the X direction or the Y direction, relative to the third plate 4 while remaining on the first plate 2. In other words, the liquid ejection head 1 can be placed at a predetermined position on the liquid ejection device 100. Furthermore, since the liquid ejection head 1 is configured not to move in the Z direction, no positional error in the X or Y direction of the liquid ejection head 1 occurs due to movement in this direction.

[0018] Next, a case where an image is formed on the medium M by the liquid ejection device 100 of this embodiment will be described.

[0019] As shown in FIG. 3, a medium M to which liquid is to be applied is placed on a stage 50. The liquid ejection device 100 is moved relative to the stage 50 in the direction of arrow A to position the liquid ejection head 1 above the medium M. The liquid ejection head 1 then ejects liquid through the ejection holes 2b, 3b, and 4b onto the medium M at an image formation position B1, forming an image. Specifically, by repeatedly ejecting ink from the liquid ejection head 1 and moving the liquid ejection device 100 in the direction of arrow A to change the liquid ejection position, images are formed sequentially starting from the right side of the image formation position B1 in FIG. 3. During this process, the positions of the first plate 2 and the second plate 3 relative to the third plate 4 are fixed. As shown in FIG. 4, the liquid ejection head 1 can be moved to match the image formation position B2 on the medium M. In other words, by moving the first plate 2 relative to the second plate 3, the liquid ejection head 1 can be positioned opposite the image formation position B2, and the liquid ejection device 100 can form an image on the medium M. Furthermore, by moving the second plate 3 in the X direction, the position of the liquid ejection head 1 in the Y direction relative to the third plate 4 can be adjusted.

[0020] In this embodiment, the Z direction, which is the stacking direction of each plate, the X direction, which is the movement direction of the second plate 3, and the Y direction, which is the movement direction of the first plate 2, are shown to be perpendicular to each other, but there may be some error from the perpendicular direction.

[0021] In this embodiment, in particular, the third plate 4, the second plate 3, and the first plate 2 are stacked in this order, and the upper plate is moved within the range of the lower plate. This allows the liquid ejection head 1 to move within the range above the third plate 4. Furthermore, by arranging members for moving the plates, such as linear guides, on the plates, the liquid ejection device 100 can be made smaller.

[0022] Next, the order of movement of each plate will be explained. In the following explanation, moving the second plate 3 in the X direction relative to the third plate 4 will be referred to as X-direction movement of the liquid ejection head 1 or simply as X-direction movement, and moving the first plate 2 in the Y direction relative to the second plate 3 will be referred to as Y-direction movement of the liquid ejection head 1 or simply as Y-direction movement.

[0023] When changing the position of the liquid ejection head 1 in the X and Y directions, moving the liquid ejection head 1 in the X direction and then in the Y direction is preferable in terms of positional accuracy of the liquid ejection head 1, rather than moving the liquid ejection head 1 in the Y direction and then in the X direction. In other words, with the latter, after the liquid ejection head 1 is positioned in the Y direction by moving it in the Y direction, there is a risk that the vibration of the second plate 3 caused by the X direction movement may cause the first plate 2 above it to become misaligned in the Y direction. In contrast, with the former, the plates are moved in the order from the lower to the upper, so that when the first plate 2, which is the later movement, is moved, the liquid ejection head 1, which has been positioned earlier, is less likely to become misaligned in the X direction, thereby further improving the positional accuracy of the liquid ejection head 1.

[0024] Furthermore, the X-direction movement and the Y-direction movement may be performed simultaneously, thereby shortening the time required to change the position of the liquid ejection head 1. Furthermore, compared to the case where the X-direction movement and the Y-direction movement are performed separately as described above, the later movement is less likely to cause misalignment of the plate positioned by the earlier movement, thereby further improving the positional accuracy of the liquid ejection head 1.

[0025] The liquid ejection head 1 may also be configured to be positionally adjustable relative to the first plate 2. For example, in the embodiment shown in FIG. 5, an adjustment plate 31 is provided on the first plate 2. The liquid ejection head 1 is fixed on the adjustment plate 31.

[0026] The adjustment plate 31 has a retractable hole 31a and an elongated hole 31b. As shown in Fig. 6, the first plate 2 has a first screw hole 2c at a position corresponding to the retractable hole 31a and a second screw hole 2d at a position corresponding to the elongated hole 31b. The retractable hole 31a has a larger diameter than the first screw hole 2c. The elongated hole 31b has a longer length in the Y direction than the second screw hole 2d.

[0027] With the adjusting plate 31 overlapping the first plate 2, one screw is screwed into the slotted hole 31a and the first screw hole 2c. This screw has a diameter that corresponds to the first screw hole 2c. Another screw is screwed into the slotted hole 31b and the second screw hole 2d. This screw has a diameter that corresponds to the second screw hole 2d. By screwing these screws, the adjusting plate 31 can be fixed to the first plate 2.

[0028] When the screws corresponding to the slotted holes 31a and the first screw holes 2c are loosened, the adjustment plate 31 can move on the first plate 2 within the range in which the screws can move relatively within the slotted holes 31a. In other words, the adjustment plate 31 can be rotated in the direction of arrow C relative to the first plate 2, centering on the screws fastened in the slotted holes 31b and the second screw holes 2d. This allows the liquid ejection head 1 to be rotated relative to the first plate 2, allowing fine adjustment of its position.

[0029] In addition to loosening the above screws, when the screws corresponding to the elongated hole 31b and the second screw hole 2d are loosened, the adjustment plate 31 can move on the first plate 2 within the range in which the screws can move relatively within the elongated hole 31b. In other words, the adjustment plate 31 can be moved in the Y direction relative to the first plate 2, allowing fine adjustment of the position of the liquid ejection head 1 in the Y direction relative to the first plate 2.

[0030] In this way, the adjustment plate 31 allows the liquid ejection head 1 to be slightly moved relative to the first plate 2. This makes it possible to finely adjust the position of the liquid ejection head 1. However, the liquid ejection head 1 may also be configured to be slightly moved in the X direction relative to the first plate 2.

[0031] Furthermore, the liquid ejection device 100 may have a configuration including multiple liquid ejection heads. Specifically, the liquid ejection device 100 shown in FIG. 7 has a first liquid ejection unit 100A and a second liquid ejection unit 100B. Each of the liquid ejection units 100A and 100B has a liquid ejection head 1A or 1B. The configuration of each of the liquid ejection units 100A and 100B is basically the same as that of the embodiment shown in FIG. 1. However, the liquid ejection units 100A and 100B share a single third plate 4. In other words, the third plate 4 is provided with a size that allows the second plates 3 and first plates 2 of each of the liquid ejection units 100A and 100B to be stacked.

[0032] An image B3 having a width in the Y direction greater than that of one liquid ejection head 1A is formed on the medium M. In this case, for example, the liquid ejection head 1A is disposed at a position corresponding to the upper region of the image B3 in FIG. 7. The liquid ejection head 1B is disposed at a position corresponding to the lower region of the image B3 in FIG. 7. The liquid ejection device 100 is then moved in the direction of arrow A, and first the upper region of the image B3 is formed by the liquid ejection head 1A, and then the lower region of the image B3 is formed by the liquid ejection head 1B.

[0033] As described above, in this embodiment, by disposing the liquid ejection heads 1A and 1B at different positions, it is possible to form images at different positions on the medium M. Therefore, compared to a liquid ejection device having only one liquid ejection head, it is possible to form images on the medium M more efficiently.

[0034] Furthermore, the liquid ejection head 1A and the liquid ejection head 1B may be arranged to be offset in the Y direction by half the pitch of the spacing between the nozzle holes to form an image, thereby increasing the resolution of the image formed on the medium M.

[0035] As described above, a configuration that allows the positions of the liquid ejection heads 1A, 1B relative to the third plate 4 to be changed in the X and Y directions allows each of the liquid ejection heads 1A, 1B to be positioned appropriately. This allows the liquid ejection heads 1A, 1B to be positioned appropriately to meet each condition, such as to improve productivity or image quality, and an image can be formed on the medium M using a printing sequence that matches these conditions. Furthermore, by increasing the distance between the liquid ejection heads 1A, 1B in the X direction, it is possible to extend the time between when the first liquid ejection head ejects ink onto the medium M and when the next liquid ejection head ejects ink onto the medium M, thereby providing time for the initially ejected ink to dry.

[0036] The liquid ejection device 100 of this embodiment has a maintenance mechanism for maintaining the liquid ejection head 1. Specifically, as shown in Figures 8 and 9, the maintenance mechanism 32 is provided on one side of the second plate 3 in the Y direction.

[0037] In this embodiment, the liquid ejection direction of the liquid ejection head 1 is the direction into the paper surface of Fig. 8. That is, the liquid ejection head 1 has a nozzle surface 1a provided with a plurality of nozzle holes on the lower side of Fig. 9.

[0038] The maintenance mechanism 32 has, for example, a wiper. By pressing this wiper against the nozzle surface 1 a, ink remaining on the nozzle surface 1 a can be wiped away. Alternatively, the maintenance mechanism 32 may be a suction mechanism that sucks ink remaining in the nozzle holes.

[0039] By moving the first plate 2 to one side in the Y direction (the lower side in FIG. 8) relative to the second plate 3, and in some cases by moving in the X direction, the nozzle surface of the liquid ejection head 1 faces the maintenance mechanism 32. In this state, the maintenance mechanism 32 performs maintenance on the nozzle holes and the like of the liquid ejection head 1. In this way, in this embodiment, the movement of the liquid ejection head 1 in the Y direction can be used to position the liquid ejection head 1 at a position facing the maintenance mechanism 32.

[0040] 9, in this embodiment, the liquid ejection head 1 is inserted into the ejection holes 2b of the first plate 2, and the nozzle surface of the liquid ejection head 1 is positioned so that it can be maintained by the maintenance mechanism 32. This allows maintenance of the liquid ejection head 1 by the maintenance mechanism 32 without providing a vertical movement mechanism on the maintenance mechanism 32 or the liquid ejection head 1.

[0041] Furthermore, when the liquid ejection direction of the liquid ejection head 1 is opposite to that of the embodiment in Fig. 8 and faces the front side of the paper in Fig. 8, the maintenance mechanism 32 is disposed in a different position. Specifically, as shown in Fig. 10, the maintenance mechanism 32 is disposed in the upward direction of Fig. 10 of the liquid ejection head 1, at a height that allows maintenance of the nozzle surface 1a. The maintenance mechanism 32 is fixed to the position shown in Fig. 10 by a predetermined fixing structure.

[0042] In this embodiment as well, by moving the liquid ejection head 1 in the X direction and the Y direction to a position facing the maintenance mechanism 32, the liquid ejection head 1 can be maintained by the maintenance mechanism 32.

[0043] In the above embodiment, the liquid ejection head 1 is disposed only on the first plate 2, but this is not limiting. For example, as shown in FIG. 11 , in addition to the first liquid ejection head 1A disposed on the first plate 2, a second liquid ejection head 1B is disposed on the second plate 3. The position of this second liquid ejection head 1B in the X direction can be changed by moving the second plate 3 relative to the third plate 4. In the embodiment shown in FIG. 12 , the second liquid ejection head 1B is disposed on the third plate 4. This second liquid ejection head 1B is fixed at a position on the third plate 4. Note that while FIGS. 11 and 12 show a case where the ink is ejected toward the front of the paper, if the ink is ejected toward the back of the paper, ejection holes are provided at positions on each plate corresponding to the nozzle holes of each ink head. However, the second and third liquid ejection heads may be disposed on both the second plate 3 and the third plate 4.

[0044] An image can be formed on the medium using these multiple liquid ejection heads 1A, 1B. In this case, by moving the liquid ejection heads 1A, 1B in the embodiment shown in Fig. 11, or by moving the liquid ejection head 1A in the embodiment shown in Fig. 12, the positions of these liquid ejection heads with respect to the third plate 4 and the relative positions of the liquid ejection heads 1A, 1B can be changed. This makes it possible to select the optimal arrangement of the liquid ejection heads for forming an image on the medium.

[0045] Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and it goes without saying that various modifications can be made without departing from the spirit of the present invention.

[0046] The term "liquid ejection device" includes devices that have a liquid ejection head or a liquid ejection unit and eject liquid by driving the liquid ejection head. Liquid ejection devices include not only devices that can eject liquid onto objects to which the liquid can adhere, but also devices that eject liquid into air or liquid.

[0047] This "liquid ejection device" can also include means for feeding, transporting, and discharging items onto which liquid can be attached, as well as pre-processing devices and post-processing devices.

[0048] For example, examples of "liquid ejection devices" include image forming devices, which are devices that eject ink to form images on paper, and three-dimensional modeling devices (three-dimensional modeling devices), which eject modeling liquid onto a powder layer formed from layers of powder in order to create a three-dimensional object (a three-dimensional model).

[0049] Furthermore, the term "liquid ejection device" is not limited to devices that visualize meaningful images such as letters and figures using ejected liquid. For example, it also includes devices that form patterns that have no meaning in themselves, and devices that create three-dimensional images.

[0050] The object to which the liquid is applied may be anything to which the liquid can adhere. This "object to which the liquid can adhere" means anything to which the liquid can adhere at least temporarily, and to which the liquid adheres and sticks, or to which the liquid adheres and penetrates. Specific examples include media such as paper, recording paper, film, and cloth, electronic circuit boards, electronic components such as piezoelectric elements, powder layers, organ models, and test cells, and unless otherwise specified, includes all objects to which the liquid can adhere.

[0051] The material of the "substance to which a liquid can adhere" may be any material to which a liquid can adhere, even temporarily, such as paper, thread, fiber, fabric, leather, metal, plastic, glass, wood, or ceramics.

[0052] Other examples of "liquid ejection devices" include a treatment liquid application device that ejects a treatment liquid onto paper to apply the treatment liquid to the surface of the paper for purposes such as modifying the surface of the paper, and an injection granulation device that sprays a composition liquid in which raw materials are dispersed through a nozzle to granulate fine particles of the raw materials.

[0053] In the present application, the terms image formation, recording, printing, copying, printing, modeling, etc. are all synonymous. [Explanation of symbols]

[0054] 1 Liquid ejection head 2 First plate (first holding member) 3 Second plate (second holding member) 4. Third plate (third holding member) 31 Adjustment plate 32 Maintenance Organization 100 Liquid dispensing device M Media (liquid application or printing target) X 2nd direction Y 1st direction [Prior art documents] [Patent documents]

[0055] [Patent Document 1] Japanese Patent Application Laid-Open No. 2007-136254

Claims

1. a liquid ejection head; a first holding member for holding the liquid ejection head; a second holding member that holds the first holding member; a third holding member that holds the second holding member, the third holding member, the second holding member, and the first holding member are stacked in this order; the first holding member is provided so as to be reciprocally movable on the second holding member in a first direction perpendicular to the stacking direction, the second holding member is provided to be reciprocally movable on the third holding member in a second direction perpendicular to the stacking direction and the first direction, a liquid ejection direction from the liquid ejection head is a direction from the first holding member side to the third holding member side in the stacking direction, The liquid ejection apparatus further comprises a maintenance mechanism on the second holding member for performing maintenance on the liquid ejection head.

2. A plurality of liquid ejection heads; a first holding member for holding the liquid ejection head; a second holding member that holds the first holding member; a third holding member that holds the second holding member, the third holding member, the second holding member, and the first holding member are stacked in this order; the first holding member is provided so as to be reciprocally movable on the second holding member in a first direction perpendicular to the stacking direction, the second holding member is provided to be reciprocally movable on the third holding member in a second direction perpendicular to the stacking direction and the first direction, A liquid ejection apparatus, wherein the liquid ejection head is provided on at least one of the second holding member and the third holding member.

3. a liquid ejection direction from the liquid ejection head is a direction from the first holding member side to the third holding member side in the stacking direction, 3. The liquid ejection apparatus according to claim 2, further comprising a maintenance mechanism on the second holding member for performing maintenance on the liquid ejection head.

4. a liquid ejection direction from the liquid ejection head is a direction from the third holding member side to the first holding member side in the stacking direction; 3. The liquid ejection apparatus according to claim 2, further comprising a maintenance mechanism for performing maintenance on the liquid ejection head, located downstream of the liquid ejection head in the liquid ejection direction.

5. The liquid ejection device according to claim 1 , wherein the liquid ejection head is provided so that its position relative to the first holding member is adjustable.

6. 6. The liquid ejection apparatus according to claim 1, further comprising a plurality of the liquid ejection heads, a plurality of first holding members, and a plurality of second holding members arranged in the main scanning direction.

7. The liquid ejection apparatus according to claim 1 , wherein the second holding member and the first holding member are moved simultaneously.

Images