Liquid dispensing device

Abstract

To provide a liquid discharge device that suppresses deterioration in print image quality by suppressing the influence of a jet flow of discharged liquid.SOLUTION: A liquid discharge device 1 includes: a conveyance path 7 that can convey a medium S in a conveyance direction F; a liquid discharge head 9 that discharges a liquid onto the medium S conveyed in the conveyance direction F; a carriage 11 that is equipped with the liquid discharge head 9 and can move in the width direction, which is a direction intersecting the conveyance direction F; a cover member 13 that is located above the carriage 11 and covers the movement range of the carriage 11; and an airflow adjustment cover 15 that is located between the cover member 13 and the carriage 11 and covers the movement range of the carriage 11.SELECTED DRAWING: Figure 2

Description

Technical Field

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

Background Art

[0002] As an example of this type of liquid ejection device, there is one described in Patent Document 1. Patent Document 1 describes a serial inkjet printer in which a carriage having a liquid ejection head reciprocates in the medium width direction and performs recording on a medium conveyed through a conveyance path.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When ink, which is a liquid, is ejected from a liquid ejection head and ink droplets land on a medium, the flying ink droplets generate a jet flow around them. A jet flow is an air current generated by flying droplets. This jet flow flows in a random direction and affects the trajectories of other droplets flying nearby. The jet flow flowing in a random direction bends the flight trajectory of the ink droplets from the liquid ejection head to the medium in a random direction, and there may be cases where recording as intended cannot be performed on the medium. Also, since the jet flow is an air current flowing in a random direction, the landing position of the ink droplets cannot be corrected by adjusting the ejection timing of the ink droplets. In other words, the landing accuracy of the ink droplets may be reduced by the jet flow flowing in a random direction, which may reduce the print image quality. If the gas between the liquid ejection head and the medium is in a state where it is difficult to move, the influence of the jet flow is likely to occur, and the print image quality may be reduced.

Means for Solving the Problems

[0005] To solve the above problems, the liquid dispensing device according to the present invention is characterized by comprising: a transport path capable of transporting a medium in a transport direction; a liquid dispensing head for dispensing liquid onto the medium being transported in the transport direction; a carriage equipped with the liquid dispensing head and movable in a width direction which intersects the transport direction; a cover member located above the carriage and covering the range of movement of the carriage; and an airflow adjusting cover located between the cover member and the carriage and covering the range of movement of the carriage. [Brief explanation of the drawing]

[0006] [Figure 1] An overall external perspective view of the liquid dispensing device according to Embodiment 1. [Figure 2] External perspective view of the liquid dispensing device according to Embodiment 1 during the dispensing process. [Figure 3] Figure 2 shows an external perspective view with the second cover opened. [Figure 4] Perspective views (A) and (B) illustrating the structure of the airflow adjustment cover. [Figure 5] A perspective view of the device body of Embodiment 1 with a portion omitted. [Figure 6] A cross-sectional view of the main part of the liquid dispensing device according to Embodiment 1. [Modes for carrying out the invention]

[0007] The present invention will now be described in general terms. To solve the above problems, a liquid dispensing device according to a first aspect of the present invention is characterized by comprising: a transport path capable of transporting a medium in a transport direction; a liquid dispensing head for dispensing liquid onto the medium being transported in the transport direction; a carriage equipped with the liquid dispensing head and movable in a width direction which intersects the transport direction; a cover member located above the carriage and covering the range of movement of the carriage; and an airflow adjusting cover located between the cover member and the carriage and covering the range of movement of the carriage.

[0008] According to this embodiment, the airflow adjustment cover is provided, which is located between a cover member positioned above the carriage and covering the carriage's range of movement and the carriage itself, and also covers the carriage's range of movement. As a result, the space above the carriage becomes narrower due to the presence of the airflow adjustment cover than when only the cover member is present in the space above the carriage. When the space above the carriage is narrowed by the airflow adjustment cover, the gas in this space becomes more difficult to move as the carriage moves back and forth. When the gas in the space above the carriage becomes more difficult to move, the gas between the liquid discharge head and the medium, which is the space below the carriage, becomes easier to move. This is because the movements of the gas in the space above the carriage and the gas in the space below the carriage are correlated during the carriage's back and forth movement. When the gas between the liquid discharge head and the medium becomes more mobile, the gas between the liquid discharge head and the medium can be made to flow in one direction along the direction of movement of the carriage in conjunction with the reciprocating movement of the carriage. By generating an airflow larger than the jet and flowing in one direction, the jet flowing in random directions can be eliminated. Furthermore, by eliminating the jet flowing in random directions, the deviation in the landing position of the ink droplets caused by the unidirectional airflow can be corrected by adjusting the ink droplet discharge timing. In other words, the effect of the jet is suppressed by adjusting the gas between the liquid discharge head and the medium, which is generated in conjunction with the reciprocating movement of the carriage, to flow in one direction. In other words, according to this embodiment, by providing the airflow adjustment cover, the gas between the liquid discharge head and the medium can move more easily, thereby suppressing the effect of the jet and thus suppressing the deterioration of image quality.

[0009] A liquid dispensing device according to a second aspect of the present invention, in the first aspect, comprises a box-shaped outer case and a device body that is retractably provided in the outer case and to which the carriage is attached, wherein the cover member forms part of the outer case, and the airflow adjustment cover is attached to the device body.

[0010] According to this embodiment, in a liquid dispensing device in which the device body to which the carriage is attached is retractably provided in the outer case, an effective effect can be obtained by providing the airflow adjustment cover on the device body.

[0011] A liquid dispensing device according to a third aspect of the present invention is characterized in that, in the first or second aspect, it comprises a carriage frame to which the carriage is movably mounted, and the airflow adjustment cover is attached to the carriage frame.

[0012] According to this embodiment, the airflow adjustment cover is attached to the carriage frame. This makes it easy to attach the airflow adjustment cover with a narrow gap between it and the carriage.

[0013] A liquid discharge device according to a fourth aspect of the present invention, in the third aspect, is characterized in that the airflow adjustment cover is rotatably attached to the carriage frame and can take an airflow adjustment position that covers the range of movement of the carriage and a retracted position that moves away from the airflow adjustment position to expose the carriage and the transport path. Here, in the "retracted position that moves away from the airflow adjustment position and exposes the carriage and the transport path," the phrase "expose the carriage and the transport path" is used in this specification to mean that it is sufficient if the carriage is exposed or not, as long as maintenance of the carriage can be performed, and that the transport path is exposed in a way that allows access to address blockages in the medium.

[0014] According to this aspect, the airflow adjustment cover can take an airflow adjustment position that covers the moving range of the carriage and a retracted position that retracts from the airflow adjustment position to expose the carriage and the conveyance path. Thereby, by rotating the airflow adjustment cover to the retracted position, maintenance of the carriage can be performed. Also, it is possible to deal with clogging of the medium generated in the conveyance path.

[0015] The liquid ejection device according to the fifth aspect of the present invention is, in the third aspect, characterized in that the airflow adjustment cover includes a first cover attached to the carriage frame and a second cover rotatably attached to the tip of the first cover, and the second cover can take an airflow adjustment position that covers the moving range of the carriage and a retracted position that retracts from the airflow adjustment position to expose the carriage and the conveyance path. Here, in the "retracted position where the carriage and the conveyance path are exposed by retracting from the airflow adjustment position", the "exposing the carriage and the conveyance path" means, in the present specification, an exposure that allows maintenance of the carriage whether or not all of the carriage is exposed, and also an exposure that allows access to the conveyance path to deal with clogging of the medium.

[0016] According to this aspect, it is possible to take a retracted position that exposes the carriage and the conveyance path by rotating only the second cover among the airflow adjustment covers including the first cover and the second cover. Thereby, it is possible to perform rotation for taking the retracted position with a lighter force than when rotating the entire airflow adjustment cover.

[0017] The liquid ejection device according to the sixth aspect of the present invention is, in the fifth aspect, characterized in that the second cover includes an operation knob portion for rotation operation, and the placement portion at the tip of the operation knob is placed on a placement portion provided on another member to determine the airflow adjustment position of the second cover.

[0018] According to this aspect, since the second cover includes an operation knob portion for rotation operation, it is easy for the user to perform the rotation operation. Further, the placement portion at the tip is configured to determine the airflow adjustment position of the second cover by being placed on the placement portion provided on another member. Thereby, the airflow adjustment position is stabilized, and thus the influence of the jet flow can be stably suppressed, and a decrease in image quality can be suppressed.

[0019] The liquid ejection device according to the seventh aspect of the present invention is, in the fifth aspect, characterized in that at least the second cover of the airflow adjustment cover has a flat surface facing the carriage, and reinforcing ribs are formed on the opposite surface.

[0020] According to this aspect, since at least the second cover of the airflow adjustment cover has a flat surface facing the carriage, the distance from the second cover is the same at any position where the carriage moves. Thereby, the effect of the airflow adjustment cover can be effectively exhibited. Further, since reinforcing ribs are formed on the opposite surface, it can be configured with a thin, light, and rigid member.

[0021] The liquid ejection device according to the eighth aspect of the present invention is, in the first aspect or the second aspect, characterized in that the distance between the airflow adjustment cover and the carriage is variable.

[0022] According to this aspect, since the distance between the airflow adjustment cover and the carriage is variable, it is possible to cope with environmental changes such as temperature and humidity by finely adjusting the distance with respect to environmental changes.

[0023] [Embodiment 1] Hereinafter, the liquid ejection device according to Embodiment 1 will be specifically described based on FIGS. 1 to 6. In the following explanation, the three mutually orthogonal axes will be referred to as the X-axis, Y-axis, and Z-axis, as shown in each figure. The Z-axis direction corresponds to the vertical direction, i.e., the direction in which gravity acts. The X-axis and Y-axis directions correspond to the horizontal direction. In each figure, the direction indicated by the arrows on the three axes (X, Y, Z) is the positive direction for each axis, and the opposite direction is the negative direction.

[0024] The liquid ejection device 1 of this embodiment is an inkjet printer that prints by ejecting liquid ink onto a medium S (Figure 6) such as paper. As shown in Figures 1 to 3, the liquid dispensing device 1 comprises a box-shaped outer case 3 and a device body 5 that is retractably installed inside the outer case 3. The outer case 3 has an opening on one side 2. The device body 5 is retractably installed inside the outer case 3 through the opening on the side 2. Figure 1 shows the device body 5 housed within the outer casing 3, while Figures 2 and 3 show the device body 5 partially pulled out from within the outer casing 3. The device body 5 is configured to be fully pulled out from the outer casing. However, the device body 5 may also be configured not to be fully pulled out from the outer casing.

[0025] The main body of the device 5 includes a transport path 7 capable of transporting the medium S in the transport direction F, a liquid discharge head 9 that discharges liquid onto the medium S being transported along the transport path 7 in the transport direction F, and a carriage 11 equipped with the liquid discharge head 9 that is capable of reciprocating in the width direction (X-axis direction), which is a direction intersecting the transport direction F. Furthermore, it includes a cover member 13 located above the carriage 11 and covering the range of movement of the carriage 11. Here, the cover member 13 is composed of the upper surface 4 which forms part of the outer case 3. Multiple reinforcing ribs 30 (Figure 6) that are long in the X-axis direction are formed on the back surface, i.e., the inner surface, of the upper surface 4 of the outer case 3. Furthermore, an airflow adjustment cover 15 is provided, located between the cover member 13 and the carriage 11. The airflow adjustment cover 15 is configured to cover the reciprocating movement range of the carriage 11 from above. Here, "covering" in the context of covering the reciprocating movement range (X-axis direction) of the carriage 11 from above means that it is desirable for the structure to cover the entire reciprocating movement range (X-axis direction), but it may also be a structure that covers only a part of it.

[0026] The main body of the device 5 has a front section 6. As shown in Figure 1, when the main body of the device 5 is housed in the outer case 3, the front section 6 forms part of the external appearance of the liquid dispensing device 1. The main body of the device 5 has mechanical structures such as the carriage 11 and the transport path 7 located behind the front section 6 (+Y direction). An opening / closing section 8 is provided on the front section 6. The opening / closing section 8 can be opened and closed using the lower end 10 as a pivot point. When the opening / closing section 8 is opened from the closed state shown in Figure 1, it becomes the part through which the medium S is discharged from the main body of the device 5. A medium inversion unit (not shown) which forms part of the transport path 7 is located at the innermost part of the main body of the device 5. A medium storage section (not shown) is located at the bottom of the main body of the device 5. In the main body 5 of the device, the medium S contained in the medium storage section is transported along the transport path 7 in the transport direction F by the transport roller 14 (Figure 6), and the liquid is discharged in the area facing the liquid discharge head 9. The medium S is further transported along the transport path 7 and discharged into the open / closed section 8. As shown in Figure 1, an operation panel 12 is located above the open / closed section 8 on the front section 6.

[0027] Furthermore, as shown in Figures 5 and 6, in this embodiment, the carriage 11 is mounted to a carriage frame 17 fixed to the base frame 22 of the main body of the device 5 so as to be able to move back and forth. The airflow adjustment cover 15 is attached to the carriage frame 17. In this embodiment, the airflow adjustment cover 15 comprises a first cover 19 attached to the carriage frame 17 and a second cover 21 rotatably attached to the tip of the first cover 19. The second cover 21 is configured to rotate to take on an airflow adjustment position (Figure 2) that covers the range of movement of the carriage 11 and a retracted position (Figure 3) that moves away from the airflow adjustment position (Figure 2) to expose the carriage 11 and the transport path 7. Here, in the "retracted position (Figure 3) where the carriage 11 and transport path 7 are exposed after moving away from the airflow adjustment position (Figure 2)," "exposing the carriage 11 and transport path 7" means that the carriage 11 can be maintained whether or not the entire carriage 11 is exposed. Furthermore, the transport path 7 can be accessed to address any blockages in the transport medium S.

[0028] As shown in Figure 6, in this embodiment, the first cover 19 covers a portion of the carriage 11, specifically a portion of the upper surface 24 of the carriage 11 that extends from the carriage frame 17 in the transport direction F, from above. Furthermore, the second cover 21 covers a portion of the upper surface 24 of the carriage 11, as shown in Figure 6. 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. It has been confirmed that even if the first cover 19 and the second cover 21 do not cover the entire upper surface 24 of the carriage 11, it is possible to suppress the effects of the jet. The first cover 19 and the second cover 21 may be configured to cover the entire upper surface 24 of the carriage 11.

[0029] The first cover 19 is made of sheet metal and is screw-fastened to the carriage frame 17 by screws 16 (Figure 5), as shown in Figures 4(A)(B) and 5. In Figure 4, reference numeral 18 indicates a screw fastening hole. Note that the parts of the screws 16 and holes 18 that are not visible in each figure are omitted. The second cover 21 has pivot points 20 at both ends in the X-axis direction at the tip of the first cover 19. That is, the second cover 21 is attached to the first cover 19 so as to rotate around the pivot points 20. The second cover 21 is made of synthetic resin material.

[0030] Furthermore, as shown in Figure 5, in this embodiment, the second cover 21 is equipped with an operating knob 23 for rotational operation. The mounting portion 25 at the tip of the operating knob 23 is configured to contact a mounting portion 27 provided on another member 26 provided on the main body of the device 5 to determine the airflow adjustment position of the second cover 21. That is, when the second cover 21 is in the airflow adjustment position (Figures 2 and 5) covering the carriage 11 from above, the mounting portion 25 at the tip of the operating knob 23 rests on the mounting portion 27 formed on the other member 26, thereby maintaining its orientation. In this embodiment, the second cover 21 has a mounting portion 25 for the tip of the operating knob 23, as well as another mounting portion 28 (Figure 4) on the opposite side. This other mounting portion 28 is also configured to contact a mounting portion (not shown) provided on another component of the device body 5 to determine the airflow adjustment position of the second cover 21.

[0031] Furthermore, as shown in Figures 4(A) and 4(B), in this embodiment, the second cover 21 of the airflow adjustment cover 15 has a flat surface 29 facing the carriage 21, and reinforcing ribs 31 are formed on the opposite surface. It is also desirable that the surface of the first cover 19 facing the carriage 21 be flat. The reinforcing ribs 31 are intended to enable the second cover 21 to be constructed from a thin, light, and rigid member, and their shape is not limited to the shape shown. The flat surface 29 and reinforcing ribs 31 of the second cover 21, as well as the operating knob portion 23, the mounting portion 25, and other mounting portions 28, are formed by integral molding of the synthetic resin material.

[0032] <Description of the effects of the embodiment> (1) According to this embodiment, an airflow adjustment cover 15 is provided, which is located between the carriage 11 and a cover member 13 positioned above the carriage 11 and covering the carriage 11's range of movement. As a result, the space above the carriage 11 becomes narrower due to the presence of the airflow adjustment cover 15 than when only the cover member 13 is present in the space above the carriage 11. When the space above the carriage 11 is narrowed by the airflow adjustment cover 15, the gas in this space becomes more difficult to move when the carriage 11 moves back and forth. When the gas in the space above the carriage 11 becomes more difficult to move, the gas between the liquid discharge head 9 and the medium S, which is the space below the carriage 11, 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 correlated when the carriage 11 moves back and forth. When the gas between the liquid ejection head 9 and the medium S becomes more mobile, the gas between the liquid ejection head 9 and the medium S can be made to flow in one direction along the direction of movement of the carriage 11 in conjunction with the reciprocating movement of the carriage 11. By generating an airflow that is larger than the jet and flows in one direction, the jet flowing in random directions can be eliminated. Furthermore, by eliminating the jet flowing in random directions, the deviation in the landing position of the ink droplets caused by the unidirectional airflow can be corrected by adjusting the ink droplet ejection timing. In other words, the effect of the jet is suppressed by adjusting the gas between the liquid ejection head 9 and the medium S, which is generated in conjunction with the reciprocating movement of the carriage, to flow in one direction. In other words, according to this embodiment, by providing the airflow adjustment cover 15, the gas between the liquid discharge head 9 and the medium S can move more easily, thereby suppressing the effect of the jet and preventing a decrease in image quality.

[0033] (2) Furthermore, according to this embodiment, in a liquid dispensing device 1 in which the device body 5 to which the carriage 11 is attached is retractably provided in the outer case 3, a particularly effective effect can be obtained by providing an airflow adjustment cover 15 on the device body 5. Specifically, in a structure where the main body of the device 5 is pulled out from the outer case 3, it is not structurally easy to provide the airflow adjustment cover 15 on the inner surface of the outer case 3. However, in this embodiment, the airflow adjustment cover 15 is attached to the main body of the device 5, making its attachment easy.

[0034] (3) Furthermore, according to this embodiment, the airflow adjustment cover 15 is attached to the carriage frame 17 to which the carriage 11 is movably mounted. This makes it easy to install the airflow adjustment cover 15 with a narrow gap between it and the carriage 11. (4) Furthermore, according to this embodiment, the carriage 11 and the transport path 7 can be exposed by rotating only the second cover 21 of the airflow adjustment cover 15, which comprises the first cover 19 and the second cover 21. This makes it possible to rotate the airflow adjustment cover 15 to the retracted position with less force than when the entire airflow adjustment cover 15 is rotated.

[0035] (5) Furthermore, according to this embodiment, the second cover 21 is equipped with an operating knob 23 for rotational operation, making it easy for the user to rotate it. In addition, the mounting portion 25 at the tip of the operating knob 23 is mounted on a mounting portion 27 provided on another member 26, thereby determining the airflow adjustment position of the second cover 21. As a result, the airflow adjustment position is stabilized, thereby stably suppressing the effects of the jet and suppressing the deterioration of image quality.

[0036] (6) Furthermore, according to this embodiment, at least the second cover 21 of the airflow adjustment cover 15 has a flat surface 29 on the surface facing the carriage 11, so that the distance between the second cover 21 and the carriage 11 is the same at any position in which the carriage 11 moves. This makes it possible to effectively exert the effect of the airflow adjustment cover 15. In addition, since reinforcing ribs 31 are formed on the opposite surface, it can be made of a thin, light, and rigid member.

[0037] [Embodiment 2] Next, a liquid dispensing device according to Embodiment 2 will be described. Parts common to Embodiment 1 in terms of their configuration will be denoted by the same reference numerals and their descriptions will be omitted. Furthermore, descriptions of parts common to both Embodiment 1 and Embodiment 2 will also be omitted. In Embodiment 1, the airflow adjustment cover 15 is composed of two components, a first cover 19 and a second cover 21. However, in this embodiment, it is composed of a single component instead of two. The only difference between this embodiment and Embodiment 1 is that the airflow adjustment cover 15 is composed of a single component instead of two, so the drawings are omitted.

[0038] Specifically, the airflow adjustment cover 15 is rotatably attached to the carriage frame 17 at its base. The airflow adjustment cover 15 is configured to rotate as a whole, allowing it to take on two positions: an airflow adjustment position (Figure 2) that covers the range of movement of the carriage 11, and a retracted position (Figure 3) that moves away from the airflow adjustment position (Figure 2) to expose the carriage 11 and the transport path 7. Here, in the "retracted position (Figure 3) where the carriage 11 and transport path 7 are exposed after being moved away from the airflow adjustment position (Figure 2)," "exposing the carriage 11 and transport path 7" means, as in Embodiment 1, that the carriage 11 can be maintained whether or not it is fully exposed. Furthermore, the transport path 7 can be accessed to address any blockages in the medium S.

[0039] [Other embodiments] The liquid dispensing device according to the present invention is based on having the configuration of the embodiments described above, but it is of course possible to make partial changes or omissions to the configuration without departing from the spirit of the present invention. In the above embodiment, the liquid discharge device 1 was described as having a structure in which the device body 5 can be pulled out into the outer case 3, but it is not limited to this, and a non-pull-out structure is also possible. In this case, the cover member 13 is configured to open and close, and the carriage 11 and transport path 7 are exposed by opening and closing it. The airflow adjustment cover 15 is attached to the carriage frame 17 between the cover member 13 and the carriage 11. This makes it possible to suppress the effects of the jet, similar to Embodiment 1.

[0040] 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 is not adjustable. However, the airflow adjustment cover 15 may be configured so that the distance between it and the carriage 11 is variable. A structure that allows for variable distance can be realized, for example, by using a micro-screw structure or a rack and pinion structure. This makes it possible to deal with changes in the environment, such as temperature and humidity, by fine-tuning the distance, even if the effect of the jet changes due to environmental changes.

[0041] Furthermore, although the airflow adjustment cover 15 was described in the above embodiment as having a structure in which two covers, the first cover 19 and the second cover 21, are connected, it is not limited to this structure. The airflow adjustment cover 15 may also be configured as a single rotatable cover. [Explanation of Symbols]

[0042] 1...Liquid dispensing device, 2...Side view, 3...Outer casing, 4...Top view, 5...Device body 6...Front section, 7...Conveyor path, 8...Opening / closing section, 9...Liquid discharge head, 10...Bottom end, 11...Carriage, 12...Operation panel, 13...Cover component, 14...Conveyor roller 15...Airflow adjustment cover, 16...Screw, 17...Carriage frame, 18...Hole 19...First cover, 20...Pivot point, 21...Second cover, 22...Base frame 23...Operating knob, 24...Top surface of the carriage, 25...Mounting section, 26...Other components, 27... Mounting portion, 28... Other mounting portion, 29... Plane, 30... Rib, 31... Reinforcing rib, F...Conveying direction, S...Medium

Claims

1. A transport path capable of transporting the medium in the transport direction, A liquid dispensing head that dispenses liquid into a medium being transported in the aforementioned transport direction, The liquid discharge head is made movable in the width direction, which is a direction intersecting the transport direction. Ji and, A cover member located above the carriage and covering the carriage's range of motion, Air located between the cover member and the carriage, covering the range of movement of the carriage. It is equipped with a flow adjustment cover, The carriage is provided with a carriage frame to which the carriage is movably mounted, The aforementioned airflow adjustment cover is attached to the carriage frame, The aforementioned airflow adjustment cover is A first cover attached to the carriage frame, The first cover comprises a second cover that is rotatably attached to the tip of the first cover, The second cover has an airflow adjustment position that covers the range of movement of the carriage, and the airflow adjustment position It can be retracted from its position to a retracted position that exposes the carriage and the transport path. At least the second cover of the airflow adjustment cover has a surface facing the carriage that It is a flat surface, and the opposite surface has reinforcing ribs formed on it. A liquid dispensing device characterized by the following features.

2. A transport path capable of transporting the medium in the transport direction, A liquid dispensing head that dispenses liquid into a medium being transported in the aforementioned transport direction, The liquid discharge head is made movable in the width direction, which is a direction intersecting the transport direction. Ji and, A cover member located above the carriage and covering the carriage's range of motion, Air located between the cover member and the carriage, covering the range of movement of the carriage. It is equipped with a flow adjustment cover, The airflow adjustment cover has a variable distance from the carriage. A liquid dispensing device characterized by the following features.

3. In the liquid dispensing device according to claim 1 or claim 2, Box-shaped outer case, The device body to which the carriage is attached is retractably provided in the outer case. Equipped with a body, The cover member forms part of the outer case, The airflow adjustment cover is attached to the main body of the device. A liquid dispensing device characterized by the following features.

4. In the liquid dispensing device according to claim 1 or claim 2, The second cover is equipped with an operating knob for rotational operation, The mounting portion at the tip of the operating knob portion rests on a mounting portion provided on another member, thereby determining the airflow adjustment position of the second cover. A liquid dispensing device characterized by the following features.

5. In the liquid dispensing device according to claim 3, The second cover is equipped with an operating knob for rotational operation, The mounting portion at the tip of the operating knob portion rests on a mounting portion provided on another member, thereby determining the airflow adjustment position of the second cover. A liquid dispensing device characterized by the following features.

Images