Liquid ejection device

Abstract

The present invention provides a liquid ejection device that suppresses the effect of jet flow caused by ejected liquid, thereby suppressing the degradation of print quality. The liquid ejection device (1) includes: a transport path (7) capable of transporting medium (S) along a transport direction (F); a liquid ejection head (9) for ejecting liquid onto the medium (S) transported along the transport direction (F); a carriage (11) capable of moving the liquid ejection head (9) in a direction intersecting the transport direction (F), i.e., in the width direction; a cover member (13) located above the carriage (11) and covering the range of movement of the carriage (11); and an airflow adjustment cover (15) located between the cover member (13) and the carriage (11) and covering the range of movement of the carriage (11).

Description

Technical Field

[0001] This invention relates to a liquid ejection device. Background Technology

[0002] As an example of such a liquid ejection device, the device described in Patent Document 1 can be cited. Patent Document 1 describes a serial inkjet printer in which a carriage having a liquid ejection head reciprocates in the media width direction to perform recording on the media conveyed in the transport path.

[0003] Patent Document 1: Japanese Patent Application Publication No. 2019-166728

[0004] When liquid ink is ejected from a liquid nozzle and the ink droplets land on the medium, the flying droplets create a jet stream around them. This jet stream refers to the airflow generated by the flying droplets. This jet stream flows in a random direction, affecting the trajectories of other nearby flying droplets. This randomly flowing jet stream can sometimes cause the flight path of the ink droplets from the liquid nozzle to the medium to bend randomly, resulting in unsatisfactory recording on the medium. Furthermore, because the jet stream is a randomly flowing airflow, the landing position of the ink droplets cannot be corrected by adjusting the ejection timing. In other words, the randomly flowing jet stream can sometimes lead to reduced droplet landing accuracy, thus degrading print quality. The jet stream's influence is more likely to occur when the gas between the liquid nozzle and the medium is sluggish, sometimes resulting in reduced print quality. Summary of the Invention

[0005] To solve the above problems, the liquid ejection device of the present invention is characterized by comprising: a conveying path capable of conveying a medium along a conveying direction; a liquid ejection head for ejecting liquid onto the medium conveyed along the conveying direction; a carriage capable of moving the liquid ejection head in a direction intersecting the conveying direction, i.e., a width direction; a cover member located above the carriage and covering the movement range of the carriage; and an airflow adjustment cover located between the cover member and the carriage and covering the movement range of the carriage. Attached Figure Description

[0006] Figure 1 This is a perspective view of the overall appearance of the liquid ejection device according to Embodiment 1.

[0007] Figure 2 This is a perspective view of the liquid ejection device during its pull-out process according to Embodiment 1.

[0008] Figure 3 Is Figure 2 A 3D view of the interior with the second cover open.

[0009] Figure 4 These are perspective views (A) and (B) illustrating the structure of the cover for adjusting airflow.

[0010] Figure 5 This is a perspective view of the device body of Embodiment 1, omitting a portion thereof.

[0011] Figure 6 This is a side sectional view of the main part of the liquid ejection device according to Embodiment 1.

[0012] Explanation of reference numerals in the attached figures

[0013] 1…Liquid ejection device; 2…Side; 3…Outer housing; 4…Upper surface; 5…Main body of the device; 6…Front side; 7…Conveying path; 8…Opening and closing part; 9…Liquid ejection head; 10…Lower end; 11…Slide carriage; 12…Operating panel; 13…Cover component; 14…Conveying roller; 15…Airflow adjustment cover; 16…Screw; 17…Slide carriage frame; 18…Hole; 19…First cover; 20…Rotation fulcrum; 21…Second cover; 22…Base frame; 23…Operating knob; 24…Upper surface of the slide carriage; 25…Placement part; 26…Other components; 27…Placement part; 28…Other placement parts; 29…Plane; 30…Rib; 31…Reinforcing rib; F…Conveying direction; S…Medium. Detailed Implementation

[0014] The present invention will now be described in general terms.

[0015] To solve the above problems, the liquid ejection device according to the first aspect of the present invention is characterized by comprising: a conveying path capable of conveying a medium along a conveying direction; a liquid ejection head for ejecting liquid onto the medium conveyed along the conveying direction; a carriage capable of moving the liquid ejection head in a direction intersecting the conveying direction, i.e., a width direction; a cover member located above the carriage and covering the movement range of the carriage; and an airflow adjustment cover located between the cover member and the carriage and covering the movement range of the carriage.

[0016] According to this method, an airflow adjustment cover is provided, located between a cover member and the carriage, covering the range of motion of the carriage. The cover member is located above the carriage and also covers its range of motion. Thus, by having the airflow adjustment cover, the space above the carriage becomes narrower than when only the cover member is present. Therefore, when the space above the carriage narrows due to the airflow adjustment cover, the gas in that space is less likely to move by an amount corresponding to the narrowing during the carriage's reciprocating movement. While the gas in the space above the carriage becomes less likely to move, the gas in the space below the carriage, i.e., between the liquid nozzle and the medium, becomes more easily movable. This is because the movement of the gas in the space above and below the carriage is related during the carriage's reciprocating movement.

[0017] When the gas between the liquid nozzle and the medium becomes easily movable, it can be made to flow in one direction along the carriage's movement direction in conjunction with the reciprocating movement of the carriage. By generating an airflow larger than the jet stream and flowing in one direction, jet streams flowing in random directions can be eliminated. Furthermore, by eliminating jet streams flowing in random directions, the offset of the ink droplet's landing position caused by the unidirectional airflow can be corrected by adjusting the ink droplet ejection timing. In other words, by adjusting the gas between the liquid nozzle and the medium, generated in conjunction with the reciprocating movement of the carriage, to flow in one direction, the influence of the jet stream is suppressed.

[0018] That is, according to this method, by setting the airflow adjustment cover, the gas between the liquid nozzle and the medium becomes easier to move, thereby suppressing the influence of the jet flow and thus suppressing the degradation of image quality.

[0019] The liquid ejection device according to the second aspect of the present invention is characterized in that, in the first aspect, it comprises: a box-shaped outer housing; and a device body disposed in the outer housing in a pull-out manner and equipped with the slide, the cover member constituting part of the outer housing, and the airflow adjustment cover being mounted on the device body.

[0020] According to this method, in a liquid ejection device in which the main body of the device, on which the slide is installed, is installed in a structure that can be pulled out, an effective effect can be obtained by setting the airflow adjustment cover on the main body of the device.

[0021] The liquid ejection device according to the third aspect of the present invention is characterized in that, in the first or second aspect, the liquid ejection device includes a carriage frame on which the carriage is movably mounted, and the airflow adjustment cover is mounted on the carriage frame.

[0022] According to this method, the airflow adjustment cover is mounted on the carriage frame. Therefore, the airflow adjustment cover can be easily installed with a narrow gap from the carriage.

[0023] The liquid ejection device according to the fourth aspect of the present invention is characterized in that, in the third aspect, the airflow adjustment cover is rotatably mounted on the carriage frame and is capable of being in an airflow adjustment position covering the movement range of the carriage and a retracted position that moves away from the airflow adjustment position, exposing the carriage and the conveying path.

[0024] In this application's description, the phrase "exposing the carriage and the conveying path" in "retreat position that exposes the carriage and the conveying path from the airflow adjustment position" is used to mean that, regardless of whether the entire carriage is exposed, as long as the carriage can be maintained, it is acceptable. In addition, for the conveying path, in order to deal with the blockage of the medium, it is acceptable as long as the exposure can reach the blockage location.

[0025] According to this method, the airflow adjustment cover can be in an airflow adjustment position covering the movement range of the carriage, and in a retracted position that exposes the carriage and the conveying path. Therefore, by rotating the airflow adjustment cover to the retracted position, maintenance of the carriage can be performed. Furthermore, it can address blockages of the medium that occur on the conveying path.

[0026] The liquid ejection device according to the fifth aspect of the present invention is characterized in that, in the third aspect, the airflow adjustment cover comprises: a first cover, mounted on the carriage frame; and a second cover, rotatably mounted on the front end of the first cover, the second cover being capable of being in an airflow adjustment position covering the movement range of the carriage and a retracted position retracting from the airflow adjustment position to expose the carriage and the conveying path.

[0027] In this application's description, the phrase "exposing the carriage and the conveying path" in "retreat position that exposes the carriage and the conveying path from the airflow adjustment position" is used to mean that, regardless of whether the entire carriage is exposed, as long as the carriage can be maintained, it is acceptable. In addition, for the conveying path, in order to deal with the blockage of the medium, it is acceptable as long as the exposure can reach the blockage location.

[0028] According to this method, by rotating only the second cover inside the airflow adjusting cover, which includes the first cover and the second cover, it is possible to position the carriage and the conveying path in a retracted position. Therefore, compared to rotating the entire airflow adjusting cover, the rotation to the retracted position can be performed with less force.

[0029] The liquid ejection device according to the sixth aspect of the present invention is characterized in that, in the fifth aspect, the second cover has an operating knob for rotation operation, and the airflow adjustment position of the second cover is determined by placing the front end of the operating knob on a mounting part provided on other components.

[0030] According to this method, since the second cover has an operating knob for rotation, the user can easily perform rotation operation. Furthermore, the front mounting portion is configured to determine the airflow adjustment position of the second cover by mounting it on a mounting portion provided on other components. Therefore, the airflow adjustment position is stable, thereby stably suppressing the influence of the jet stream and suppressing image quality degradation.

[0031] The liquid ejection device according to the seventh aspect of the present invention is characterized in that, in the fifth aspect, in at least the second cover of the airflow adjustment cover, the surface opposite to the carriage is a plane, and a reinforcing rib is formed on the opposite surface.

[0032] According to this method, since at least the surface of the second cover opposite the carriage is a plane, the distance between the second cover and the airflow adjusting cover remains the same regardless of the position of the carriage's movement. Therefore, the effect of the airflow adjusting cover can be effectively realized. Furthermore, since reinforcing ribs are formed on the opposite surface, it can be constructed from a thin, lightweight, and rigid component.

[0033] The liquid ejection device according to the eighth aspect of the present invention is characterized in that, in the first or second aspect, the interval between the airflow adjustment cover and the slide is variable.

[0034] According to this method, since the interval between the airflow adjustment cover and the carriage is variable, environmental changes such as temperature and humidity can be addressed by finely adjusting the interval.

[0035] Implementation Method 1

[0036] The following is based on Figures 1 to 6 The liquid ejection device involved in Implementation Method 1 will be described in detail.

[0037] In the following explanation, as shown in the figures, the three mutually orthogonal axes are designated as the X-axis, Y-axis, and Z-axis. The Z-axis direction corresponds to the vertical direction, i.e., the direction of gravity. The X-axis and Y-axis directions correspond to the horizontal direction. In the figures, the arrows indicating the three axes (X, Y, Z) represent the positive (+) direction, and their opposite directions represent the negative (-) direction.

[0038] The liquid ejection device 1 in this embodiment is for ejecting liquid into a medium S such as paper ( Figure 6 An inkjet printer is a printer that prints by ejecting liquid ink.

[0039] like Figures 1 to 3 As shown, the liquid dispensing device 1 includes a box-shaped outer housing 3 and a device body 5 disposed within the outer housing 3 in a pull-out manner. One side 2 of the outer housing 3 is open. The device body 5 is configured to be pullable out of the outer housing 3 via the open side 2.

[0040] Figure 1 This indicates that the main body 5 is housed inside the outer casing 3. Figure 2 and Figure 3 This indicates the state where the main body 5 is partially pulled out from the outer casing 3. The main body 5 is configured to be able to be pulled out entirely from the outer casing. It should be noted that the main body 5 can also be configured not to be pulled out entirely from the outer casing.

[0041] The main body 5 of the device includes: a conveying path 7 capable of conveying medium S along the conveying direction F; a liquid nozzle 9 for spraying liquid onto the medium S conveyed along the conveying path 7 in the conveying direction F; and a carriage 11 capable of reciprocating the liquid nozzle 9 in the width direction (X-axis direction) intersecting the conveying direction F. Furthermore, a cover member 13 is provided above the carriage 11 and covers the range of motion of the carriage 11. Here, the cover member 13 is formed by an upper surface 4 that constitutes part of the outer housing 3. Multiple reinforcing ribs 30 that are longer in the X-axis direction are formed on the back side, i.e., the inner surface, of the upper surface 4 of the outer housing 3. Figure 6 ).

[0042] In addition, an airflow adjustment cover 15 is provided between the cover member 13 and the carriage 11. The airflow adjustment cover 15 is configured to cover the reciprocating range of the carriage 11 from above. Here, "covering" in "covering the reciprocating range of the carriage 11 from above (X-axis direction)" preferably means covering the entire reciprocating range of the carriage 11 (X-axis direction), but it may also be a structure that covers a portion of it.

[0043] The main body 5 of the device has a front face 6. For example... Figure 1As shown, with the main body 5 housed within the outer casing 3, the front portion 6 forms part of the appearance of the liquid ejection device 1. The main body 5 has a carriage 11, a conveying path 7, and other mechanical structures arranged behind the front portion 6 (in the +Y direction).

[0044] An opening / closing part 8 is provided on the front part 6. The opening / closing part 8 can be opened and closed using the lower end 10 as a fulcrum. The opening / closing part 8 is connected by... Figure 1 The closed state is changed to the open state, becoming a part for discharging the medium from the main body 5 of the device. A medium reversing unit (not shown) that forms part of the transport path 7 is arranged at the innermost part of the main body 5. A medium receiving section (not shown) is arranged at the bottom of the main body 5.

[0045] In the main body 5 of the device, the medium S contained in the medium receiving section is conveyed by the conveying roller 14 ( Figure 6 The medium S is conveyed along the conveying direction F on the conveying path 7, and is sprayed out in the area opposite the liquid nozzle 9. The medium S is further conveyed on the conveying path 7 and discharged to the open / closed part 8 in the open state. Figure 1 As shown, an operation panel 12 is provided on the upper part of the opening and closing part 8 of the front part 6.

[0046] In addition, such as Figure 5 and Figure 6 As shown, in this embodiment, the carriage 11 is mounted on the carriage frame 17, which is fixed to the base frame 22 of the device body 5, in a manner that allows it to reciprocate. Furthermore, an airflow adjustment cover 15 is mounted on the carriage frame 17.

[0047] In this embodiment, the airflow adjustment cover 15 includes a first cover 19 mounted on the carriage frame 17 and a second cover 21 rotatably mounted on the front end of the first cover 19. Furthermore, the second cover 21 is configured to rotate to a position that covers the range of motion of the carriage 11 for airflow adjustment. Figure 2 ) and from the airflow adjustment position ( Figure 2 The retraction position that exposes the carriage 11 and the conveying path 7 due to the retraction. Figure 3 ).

[0048] Here, "adjusting position from airflow" Figure 2 The retraction position that exposes the carriage 11 and the conveying path 7 due to the retraction. Figure 3 The phrase "expose the carriage 11 and the conveying path 7" in the text means that the carriage 11 is exposed, as long as it is exposed enough to allow for maintenance of the carriage 11, regardless of whether the entire carriage 11 is exposed. In addition, for the conveying path 7, in order to deal with the blockage of the medium S, it is sufficient to expose it enough to reach the blockage location.

[0049] like Figure 6As shown, in this embodiment, the first cover 19 covers a portion of the carriage 11 from above, namely a portion of the upper surface 24 of the carriage 11 extending from the carriage frame 17 along the conveying direction F. Furthermore, as... Figure 6 As shown, the second cover 21 covers a portion of the upper surface 24 of the carriage 11.

[0050] In this embodiment, the first cover 19 and the second cover 21 cover most of the upper surface 24 of the carriage 11, but not all of it. This confirms that even if the first cover 19 and the second cover 21 do not completely cover the upper surface 24 of the carriage 11, the influence of the jet stream can be suppressed. Alternatively, the first cover 19 and the second cover 21 may be configured to cover the entire upper surface 24 of the carriage 11.

[0051] The first cover 19 is formed of a metal plate, such as Figure 4 (A), (B) and Figure 5 As shown, by screw 16 ( Figure 5 The screws are fastened to the carriage frame 17. Figure 4 In the figures, reference numeral 18 indicates a hole for screw fastening. It should be noted that the unseen parts of screw 16 and hole 18 are omitted in the figures.

[0052] The pivot points 20 of the second cover 21 are respectively located at both ends of the front end of the first cover 19 in the X-axis direction. That is, the second cover 21 is mounted on the first cover 19 by rotating around the pivot points 20. In addition, the second cover 21 is made of synthetic resin material.

[0053] In addition, such as Figure 5 As shown, in this embodiment, the second cover 21 includes an operation knob 23 for rotation. The mounting portion 25 at the front end of the operation knob 23 is configured to contact the mounting portion 27 of another component 26 provided on the device body 5 to determine the airflow adjustment position of the second cover 21. That is, the second cover 21 is configured to be in the airflow adjustment position where it covers the slide 11 from above (…). Figure 2 , Figure 5 In the state of operation knob 23, its posture is maintained by placing the mounting portion 25 of the front end of the knob 23 on the mounting portion 27 formed on the other component 26.

[0054] In this embodiment, in the second cover 21, in addition to the mounting portion 25 at the front end of the operating knob 23, another mounting portion 28 is provided on the opposite side. Figure 4 The other mounting portion 28 is also configured to contact the mounting portion (not shown) provided on other components provided on the device body 5 to determine the airflow adjustment position of the second cover 21.

[0055] In addition, such as Figure 4As shown in (A) and (B), in this embodiment, in the second cover 21 of the airflow adjustment cover 15, the surface opposite to the slide 11 is a plane 29, and a reinforcing rib 31 is formed on the opposite surface. Preferably, the surface of the first cover 19 opposite to the slide 11 is also a plane. The reinforcing rib 31 is used to enable the second cover 21 to be constructed from a thin, light, and rigid component, and its shape is not limited to the shape shown in the figure.

[0056] The plane 29 and reinforcing rib 31 of the second cover 21, as well as the operating knob 23, the mounting part 25, and other mounting parts 28 are formed by integral molding of the synthetic resin material.

[0057] Explanation of the effects of the implementation method

[0058] (1) According to this embodiment, an airflow adjustment cover 15 is provided. The airflow adjustment cover 15 is located between the cover member 13 and the carriage 11, and covers the movement range of the carriage 11. The cover member 13 is located above the carriage 11 and covers the movement range of the carriage 11. As a result, with the presence of the airflow adjustment cover 15, the space above the carriage 11 becomes narrower than when only the cover member 13 is present above the carriage 11. Thus, when the space above the carriage 11 is narrowed by the airflow adjustment cover 15, the gas in the space above the carriage 11 is difficult to move by an amount corresponding to the narrowing when the carriage 11 reciprocates. When the gas in the space above the carriage 11 becomes difficult to move, the gas in the space below the carriage 11, i.e., between the liquid nozzle 9 and the medium S, becomes easier to move. This is because the movement of the gas in the space above the carriage 11 and the gas in the space below the carriage 11 are related when the carriage 11 reciprocates.

[0059] When the gas between the liquid ejector head 9 and the medium S becomes easily movable, the gas between the liquid ejector head 9 and the medium S can be made to flow in one direction along the moving direction of the carriage 11 in conjunction with the reciprocating movement of the carriage 11. By generating an airflow larger than the jet stream and flowing in one direction, jet streams flowing in random directions can be eliminated. Furthermore, by eliminating jet streams flowing in random directions, the offset of the ink droplet landing position caused by the airflow flowing in one direction can be corrected by adjusting the ink droplet ejection timing. In other words, by adjusting the gas between the liquid ejector head 9 and the medium S generated in conjunction with the reciprocating movement of the carriage to flow in one direction, the influence of the jet stream is suppressed.

[0060] That is, according to this embodiment, by providing the airflow adjustment cover 15, the gas between the liquid nozzle 9 and the medium S becomes easier to move, thereby suppressing the influence of the jet flow and thus suppressing the reduction in image quality.

[0061] (2) In addition, according to this embodiment, in a liquid ejection device 1 in which the device body 5 with the slide 11 is installed in a structure that can be pulled out, a particularly effective effect can be obtained by providing an airflow adjustment cover 15 to the device body 5.

[0062] Specifically, in the structure in which the main body 5 is pulled out from the outer housing 3, it is not structurally simple to set the airflow adjustment cover 15 on the inner surface of the outer housing 3. However, in this embodiment, since the airflow adjustment cover 15 is installed on the main body 5, this installation can be easily performed.

[0063] (3) In addition, according to this embodiment, the airflow adjustment cover 15 is mounted on the slide frame 17 on which the slide 11 is movably mounted. As a result, the airflow adjustment cover 15 can be easily installed with a narrow gap between it and the slide 11.

[0064] (4) Furthermore, according to this embodiment, by rotating only the second cover 21 inside the airflow adjustment cover 15, which includes the first cover 19 and the second cover 21, it is possible to reach a retracted position that exposes the carriage 11 and the transport path 7. Thus, compared to rotating the airflow adjustment cover 15 as a whole, the rotation to reach the retracted position can be performed with less force.

[0065] (5) Furthermore, according to this embodiment, since the second cover 21 has an operation knob 23 for rotation, the user can easily perform rotation operations. Additionally, the mounting portion 25 at the front end of the operation knob portion 23 is configured to determine the airflow adjustment position of the second cover 21 by being mounted on a mounting portion 27 provided on other components 26. Therefore, the airflow adjustment position is stable, thereby stably suppressing the influence of the jet stream and suppressing image quality degradation.

[0066] (6) Furthermore, according to this embodiment, since the surface of at least the second cover 21 of the airflow adjustment cover 15 facing the slide 11 is a plane 29, the distance between the second cover 21 and the slide 11 is the same regardless of the position of the slide 11. Therefore, the effect of the airflow adjustment cover 15 can be effectively realized. In addition, since a reinforcing rib 31 is formed on the opposite surface, it can be constructed from a thin, lightweight, and rigid component.

[0067] Implementation Method 2

[0068] Next, the liquid ejection device according to Embodiment 2 will be described. The same reference numerals are used for parts that are structurally similar to those in Embodiment 1, and their descriptions are omitted. Furthermore, descriptions of parts that are similar in effect are also omitted.

[0069] In Embodiment 1, the airflow adjustment cover 15 is composed of two parts: a first cover 19 and a second cover 21. However, in this embodiment, it is composed of a single part, not two parts. Since the only difference between this embodiment and Embodiment 1 is that the airflow adjustment cover 15 is composed of a single part instead of two parts, the accompanying drawings are omitted.

[0070] That is, the base of the airflow adjustment cover 15 is rotatably mounted to the carriage frame 17. Furthermore, the airflow adjustment cover 15 is configured to rotate as a whole to a position that covers the range of motion of the carriage 11, allowing it to be positioned in an airflow adjustment position. Figure 2 ) and from the airflow adjustment position ( Figure 2 The retraction position where the carriage 11 and the conveyor path 7 are exposed ( ) Figure 3 ).

[0071] Here, "adjusting position from airflow" Figure 2 The retraction position that exposes the carriage 11 and the conveying path 7 due to the retraction. Figure 3 The phrase "exposing the carriage 11 and the conveying path 7" in the document means that, as in embodiment 1, it is acceptable to expose the carriage 11 as much as possible, regardless of whether the entire carriage 11 is exposed. In addition, for the conveying path 7, it is acceptable to expose it as much as possible to reach the blockage location in order to deal with the blockage of the medium S.

[0072] Other implementation methods

[0073] The liquid ejection device involved in this invention is based on the structure of the embodiments described above, but of course, modifications or omissions of some structures can also be implemented without departing from the spirit of this invention.

[0074] In the above embodiment, the liquid ejection device 1 is described as having a structure in which the main body 5 can be pulled out relative to the outer housing 3, but this is not a limitation; it can also be a non-pull-out structure. In this case, the cover member 13 is configured to open and close, thereby exposing the carriage 11 and the transport path 7. An airflow adjustment cover 15 is mounted on the carriage frame 17 between the cover member 13 and the carriage 11. As a result, the influence of the jet flow can be suppressed in the same way as in embodiment 1.

[0075] In the above embodiment, the airflow adjustment cover 15 is fixed to the carriage frame 17, and the distance between it and the carriage 11 cannot be changed. However, the airflow adjustment cover 15 can also be configured to have a variable distance from the carriage 11. Such a variable distance can be achieved, for example, by using a microscopic screw structure, rack and pinion structure, etc. Therefore, even if the influence of the jet flow changes due to environmental variations such as temperature and humidity, the environmental changes can be addressed by fine-tuning the distance.

[0076] Furthermore, in the above embodiment, the airflow adjustment cover 15 is described as having a structure that connects the first cover 19 and the second cover 21, but it is not limited to this structure. The airflow adjustment cover 15 may also be a single rotatable cover.

Claims

1. A liquid discharge apparatus characterized by comprising: Possessing: a conveyance path capable of conveying a medium in a conveyance direction in the conveyance path; a liquid ejection head that ejects liquid toward the medium conveyed in the conveyance direction; a carriage capable of moving the liquid ejection head in a width direction that intersects the conveyance direction; a cover member positioned above the carriage and covering a movement range of the carriage; an airflow adjustment cover positioned between the cover member and the carriage and covering the movement range of the carriage; and a carriage frame to which the carriage is movably attached, the airflow adjustment cover is rotatably attached to the carriage frame and is capable of being in an airflow adjustment position that covers the movement range of the carriage and a retreat position that retreats from the airflow adjustment position to expose the carriage and the conveyance path. Possessing:

2. The liquid discharge apparatus according to claim 1, wherein an outer casing of a box shape; and a device main body provided to the outer casing in a drawable manner, the cover member constitutes a part of the outer casing.

3. The liquid ejection device according to claim 1, wherein the airflow adjustment cover possesses: a first cover attached to the carriage frame; and a second cover rotatably attached to a front end of the first cover, the second cover is capable of being in an airflow adjustment position that covers the movement range of the carriage and a retreat position that retreats from the airflow adjustment position to expose the carriage and the conveyance path.

4. The liquid ejection device according to claim 3, wherein the second cover possesses an operation knob for rotation operation, and a placement portion of a front end of the operation knob is placed on a placed portion provided to another member to determine the airflow adjustment position of the second cover.

5. The liquid ejection device according to claim 3, wherein a surface opposite to the carriage in at least the second cover of the airflow adjustment cover is a flat surface, and a reinforcing rib is formed on the opposite surface.

6. The liquid ejection device according to claim 1 or 2, wherein a distance between the airflow adjustment cover and the carriage is variable. ​

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