JP2013028103A - Liquid ejection apparatus, and liquid ejection method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid ejection apparatus and the like, capable of reducing deposition lying between a head and a platen.SOLUTION: The liquid ejection apparatus includes: the head including nozzles for ejecting liquid to a medium being conveyed in a conveying direction; the resin platen which is provided opposed to the head, and along which the medium is located; and an annular belt body which is located under the end of the medium in a width direction perpendicular to the conveying direction of the medium being conveyed, and which circulates by moving in the conveying direction on the upper side, and moving in the direction opposite to the conveying direction on the lower side.

Description

  The present invention relates to a liquid ejection apparatus and a liquid ejection method.

  As a liquid ejecting apparatus, for example, an ink jet type so-called ink jet printer that ejects ink as liquid and forms an image on a medium to be transported is known, and an image is formed using the ink jet printer. The method of doing is also known. Such an ink jet printer is provided with a plastic platen that supports the lower surface of the medium, and a print head that ejects ink is provided so as to face the platen (see, for example, Patent Document 1). The nozzles provided in the print head may become clogged due to the powder flowing when the medium passes due to static electricity generated by the friction between the conveyed medium and the platen, so that the nozzles are not clogged. In addition, the platen is subjected to antistatic treatment.

JP 2000-289290 A

  In order to form a good image with an ink jet printer, it is necessary to keep an appropriate distance between the conveyed medium and the head. For this reason, the platen that forms the conveyance path of the medium sometimes draws the medium from below the platen in order to keep the medium along the platen and to maintain an appropriate distance from the head. When the medium is sucked, the friction between the medium and the platen increases, and more static electricity is generated. For this reason, even if the platen is antistatically treated as described above, if the friction between the medium and the platen is large, there is a possibility that the generation of static electricity cannot be suppressed. There is a problem that nozzle clogging may occur more easily.

  The present invention has been made in view of such a problem, and an object of the present invention is to provide a liquid ejection apparatus and a liquid ejection method capable of reducing deposits existing between a head and a platen. It is in.

The main invention for achieving the above object is:
A head provided with a nozzle for discharging liquid onto a medium conveyed in the conveying direction;
A resin platen provided facing the head and along which the medium is disposed;
The medium to be transported is positioned below the end in the width direction of the medium that intersects the transport direction, moves in the transport direction on the upper side, and moves in the opposite direction to the transport direction on the lower side. An annular belt body that circulates by
It is a liquid discharge apparatus characterized by having.

  Other features of the present invention will become apparent from the description of the present specification and the accompanying drawings.

It is a perspective view of the inkjet printer in this embodiment. It is an internal side view of the inkjet printer in this embodiment. It is a perspective view for demonstrating the structure of a 1st belt unit and a 2nd belt unit. It is a perspective view of the platen unit in this embodiment. It is a top view which shows the platen unit and the 1st, 2nd belt unit in this embodiment. It is a figure explaining the phenomenon which arises between a platen and the nozzle plate of a head. It is a figure explaining the state of paper dust when the sponge containing a colorless liquid is provided. It is a perspective view which shows the modification of a 1st belt unit and a 2nd belt unit.

At least the following matters will become clear from the description of the present specification and the accompanying drawings. That is,
A head provided with a nozzle for discharging liquid onto a medium conveyed in the conveying direction;
A resin platen provided facing the head and along which the medium is disposed;
The medium to be transported is positioned below the end in the width direction of the medium that intersects the transport direction, moves in the transport direction on the upper side, and moves in the opposite direction to the transport direction on the lower side. An annular belt body that circulates by
It is a liquid discharge apparatus characterized by having.

  According to such a liquid ejecting apparatus, it is positioned below the end in the width direction of the medium to be transported, moved in the transport direction on the upper side, and moved in the direction opposite to the transport direction on the lower side. Since the circulating belt body is provided, the conveyed medium comes into contact with the annular belt body, and the adhering material such as powder adhering to the annular belt body is moved below the annular belt body. It is possible to reduce the deposits existing between the head and the platen. For this reason, it is possible to provide a liquid ejecting apparatus that can prevent the deposits such as powder from flying when the medium is conveyed.

Such a liquid ejection device,
It is desirable that a deposit removing member for removing deposits on the annular belt body is in contact with the lower side of the annular belt body.
According to such a liquid ejecting apparatus, since the deposit removing member for removing deposits on the annular belt body is in contact with the lower side of the annular belt body, the head and the platen can be more reliably connected. It is possible to reduce the deposits present in between.

Such a liquid ejection device,
A moisture member for moistening the annular belt body may be in contact with the lower side of the annular belt body.
According to such a liquid ejecting apparatus, the moisture member for moistening the annular belt body is in contact with the lower side of the annular belt body, so that friction occurs between the annular belt body and the medium. However, it is difficult to generate static electricity. For this reason, when the deposit | attachment adhering to the annular belt body is conveyed below the annular belt body, it is possible to more reliably drop the deposit from the annular belt body.

Such a liquid ejection device,
The annular belt body is preferably conductive and grounded.
According to such a liquid ejecting apparatus, since the annular belt body is electrically conductive and grounded, static electricity is hardly generated even if friction occurs between the annular belt body and the medium. For this reason, when the deposit | attachment adhering to the annular belt body is conveyed below the annular belt body, it can be more reliably dropped from the annular belt body.

Such a liquid ejection device,
A conveyance drive unit for conveying the medium;
The annular belt body is preferably driven by the transport driving unit.
According to such a liquid ejecting apparatus, since the annular belt body is driven by the transport driving unit that transports the medium, it is not necessary to include a driving unit only for driving the annular belt body. For this reason, it is possible to reduce the size of the apparatus and reduce the cost.

Further, in the medium conveyed in the conveying direction along the resin platen, under the end in the width direction of the medium intersecting the conveying direction,
An annular belt body whose upper side moves in the transport direction and whose lower side moves in the direction opposite to the transport direction circulates in the medium transported in the transport direction,
A liquid discharge method is characterized in that liquid is discharged from a nozzle facing the platen.
According to such a liquid ejection method, in the medium conveyed in the conveying direction along the platen, the upper side moves in the conveying direction below the end in the width direction of the medium, and the lower side is the direction opposite to the conveying direction. Since the medium is conveyed in the conveying direction while the annular belt body moving to the inside is circulated, the paper dust or the like of the medium being conveyed adheres to the annular belt body and attaches the powder or the like adhered to the annular belt body. By moving the kimono to the lower side of the annular belt body and dropping it down, it is possible to reduce the deposits existing between the head and the platen. For this reason, it is possible to provide a liquid ejection method capable of suppressing the deposition of powder and the like when the medium is conveyed.

=== Embodiment ===
FIG. 1 is a perspective view of an ink jet printer 1 in the present embodiment. As shown in the figure, the inkjet printer 1 includes a recording unit 40 in which the longitudinal direction is horizontally arranged, and a supply unit that supplies the recording unit 40 with a sheet S (see FIG. 2) as a medium (recording medium). 10, a casing 90 attached to the end of the recording unit 40 and the supply unit 10, a discharge unit 60 from which the paper S recorded by the recording unit 40 is discharged, the recording unit 40, and the supply unit 10. And the leg part 70 which supports the discharge part 60 from the downward direction is provided.

  The supply unit 10 includes a roll assembly 11 (see FIG. 2) including a roll R on which a long sheet S (see FIG. 2) is wound. In FIG. 1, the roll assembly 11 is covered with a roll cover 91 of the housing 90.

  The recording unit 40 has its internal mechanism covered with a top cover 42 and a front cover 44. A head 41 (see FIG. 2), which will be described later, is arranged inside the recording unit 40, and ink as a liquid is ejected to the paper S that is drawn from the roll R of the supply unit 10 and fed to the recording unit 40. Thus, an image is formed.

  The sheet S on which the image is formed in the recording unit 40 is discharged to the outside from a discharge unit 60 formed on the downstream side of the recording unit 40 in the transport direction. The leg portion 70 is provided for the purpose of preventing the sheet S that has passed through the discharge portion 60 from coming into contact with the floor surface.

  The housing 90 attached to the end of the recording unit 40 forms a space for the home position where the head 41 retracted from the recording area from which ink is ejected waits, and covers the cartridge holder 20 in the lower part thereof. Yes. An ink cartridge (not shown) that contains ink to be supplied to the head 41 is mounted on the cartridge holder 20 inside a holder cover 22 that covers the surface of the cartridge holder 20.

  An operation panel 80 is disposed on the upper surface of the housing 90. The operation panel 80 includes a plurality of switches 82 operated by the user, and a display unit 84 that indicates an operation state of the inkjet printer 1. Accordingly, the user operates the inkjet printer 1 from the front side with the side on which the operation panel 80 and the cartridge holder 20 are disposed as the front side.

FIG. 2 is an internal side view of the inkjet printer 1 in the present embodiment.
As shown in FIG. 2, the inkjet printer 1 forms an image on the spindle 13 that holds the roll R, the conveyance path 14 that conveys the paper S fed out from the roll R, and the conveyed paper S. The recording unit 40, a discharge unit 60 that discharges the paper S that has undergone image formation, and a cutter device 61 that shears the paper S discharged from the discharge unit 60 are provided. The conveyance path 14 includes a conveyance roller 45 that conveys the paper S and a pair of guides that regulate the meandering of the paper S between the roll R and the recording unit 40.

  The sheet S to be conveyed includes a fixed guide portion (not shown) fixed to the operation panel 80 side (right side in the sheet width direction in FIG. 4) in the sheet width direction of the sheet S intersecting the conveyance direction, and the operation panel 80. It is guided and conveyed by a moving guide portion 46 as a guide member provided so as to be movable in the paper width direction on the opposite side (left side in the paper width direction in FIG. 4). In other words, the transported paper S is adjusted by moving the moving guide portion 46 according to the paper width of the paper S having one end along the fixed guide portion, so that the paper widths are different from each other. The sheet S can be conveyed without meandering.

  Further, on the upstream side of the recording unit 40 in the conveyance direction, belts 47a and 48a as annular belt bodies are positioned below the end of the sheet S to be conveyed in the width direction of the sheet S that intersects the conveyance direction. A pair of belt units 47 and 48 having (see FIG. 3) are provided.

  FIG. 3 is a perspective view for explaining the configuration of the first belt unit 47 and the second belt unit 48. Since the first belt unit 47 and the second belt unit 48 are merely reversed in the paper width direction length of the first belt 47a and the second belt 48a, FIG. 3 shows the first belt unit 47. However, portions corresponding to the second belt unit 48 are indicated by reference numerals of the second belt unit 48.

  The pair of belt units 47 and 48 includes a first belt unit 47 having a first belt 47 a provided below an area through which an end portion along the fixed guide portion passes in the paper width direction, and a moving guide portion 46. And a second belt unit 48 having a second belt 48a provided below the region through which the end portion along the side passes. Since the end portion of the sheet S on the side where the second belt 48a is disposed has a different position in the sheet width direction depending on the sheet width of the sheet S, the second belt 48a has the entire area through which the end portion of the transportable sheet S passes. The width is wider than that of the first belt 47a.

  Each of the first belt unit 47 and the second belt unit 48 includes two shafts arranged in parallel in the transport direction, specifically, the first belt 47a on the drive shafts 47b and 48b and the driven shafts 47c and 48c. The second belt 48a is stretched over. Belt shaft gears 47d and 48d are provided on the drive shafts 47b and 48b, and the belt shaft gears 47d and 48d are roller shaft gears 47f provided on the shaft of the transport roller 45 via relay gears 47e and 48e, 48f is connected. In other words, the first belt 47a and the second belt 48a are driven in synchronism with the transport roller 45 by a transport driving unit (not shown) including a motor or the like that drives the transport roller 45, for example.

  In the first belt 47a and the second belt 48a, the upper surfaces of the first belt 47a and the second belt 48a moving in the conveying direction above the drive shafts 47b and 48b and the driven shafts 47c and 48c are the support surfaces of the platen 31 described later. It arrange | positions so that the substantially same height as 312 (refer FIG. 4) may be made. The paper S is conveyed on the upper side of the first belt 47a and the second belt 48a, and is circulated by moving in the opposite direction to the conveying direction on the lower side.

  Under the first belt 47a and the second belt 48a, the adhering matter (for example, paper) is brought into contact with the lower surfaces of the first belt 47a and the second belt 48a and adhered to the first belt 47a and the second belt 48a. A brush 49 as an adhering matter removing member for removing the powder is provided in contact with the first belt 47a and the second belt 48a.

  For this reason, even if the paper dust adheres to the first belt 47a and the second belt 48a when the paper S is conveyed on the upper surfaces of the first belt 47a and the second belt 48a, the attached paper dust remains in the first belt 47a and the second belt 48a. When it moves downward together with 47a and the second belt 48a, it is scraped off by the brush 49. For this reason, the amount of paper dust existing between the platen 31 and the head 41 is reduced.

  In addition, the inkjet printer 1 includes a platen unit 30 that supports the conveyed paper S below a head 41 described later. The platen unit 30 includes a platen 31, a platen base 32, and a support member 33. The detailed configuration of the platen unit 30 will be described later. Further, the ink jet printer 1 includes a control unit (not shown) that comprehensively controls the operation of each component.

  In the following description, the transport direction of the paper S, that is, the direction from the supply unit 10 side to the discharge unit 60 side is the X axis direction, the paper width direction of the paper S perpendicular to the X axis direction is the Y axis direction, and X A vertical direction that is orthogonal to both the axial direction and the Y-axis direction may be referred to as a Z-axis direction.

  The recording unit 40 includes a head 41 that ejects ink onto the paper S conveyed along the conveyance path 14. The head 41 is mounted on a carriage 43 that is movable in the paper width direction of the conveyance path 14, that is, in the paper width direction of the paper S. The head 41 is provided with a nozzle plate having a plurality of nozzle rows on the surface facing the platen 31 when moving, and a predetermined color (for example, yellow (Y), magenta (M), Cyan (C) and black (K) ink can be ejected. The head 41 is supported by the platen 31 and records information such as a predetermined image and characters by ejecting ink at a predetermined timing from a predetermined nozzle onto the recording surface of the paper S fed from the roll R. Perform image formation.

  The sheet S on which an image is formed by the recording unit 40 is discharged from the discharge unit 60 through the nip portion 50 that constitutes the terminal portion of the conveyance path 14. The nip portion 50 includes a plurality of discharge rollers 51 that nip the sheet S and rotate it to discharge the sheet S. The discharge roller 51 is provided with a mechanism for switching the roller for nipping depending on the paper type to the jagged roller 51a or the roller roller 51b.

  A cutter device 61 that shears the discharged paper S to a predetermined size is provided on the downstream side of the nip portion 50. The cutter device 61 shears the paper S by moving in the paper width direction (Y-axis direction) orthogonal to the regulating member 62 that regulates the height position of the discharged paper S and the paper S discharge direction (X-axis direction). And a cutter unit 63.

  Since the large-sized inkjet printer 1 as shown in FIG. 1 is long in the paper width direction, the platen unit 30 includes a plurality of platens 31 that support the paper S.

FIG. 4 is a perspective view of the platen unit 30 in the present embodiment. FIG. 4 shows a platen 31, a platen base 32, and a support member 33 as the minimum components constituting the platen unit 30 of the present embodiment. FIG. 4 is a perspective view showing a part of the platen unit 30 in order to facilitate the description of the configuration of the platen unit 30. FIG. 5 is a top view showing the platen unit 30, the first belt unit 47, and the second belt unit 48 in the present embodiment. FIG. 5 shows that the platen 31 includes a first platen 31A, a second platen 31B, and a third platen 31C, which are connected in the paper width direction. However, the number of platens constituting the platen unit 30 is not limited to this. Further, the length of the platen in the paper width direction is not limited to this.
Hereinafter, the outline of the platen unit 30 will be described with reference to these drawings.

  The support member 33 is a member for supporting the platen base 32 at the upper part thereof. The platen base 32 includes a first platen base 32A, a second platen base 32B, and a third platen base (not shown), and is connected in the paper width direction.

  Although these platen bases 32 have different lengths in the paper width direction (Y-axis direction), the other configurations have substantially the same configuration, and here, the first platen base 32A is mainly used as an example here. I will give you a description. In addition, a first platen 31A, a second platen 31B, and a third platen 31C are provided above the first platen base 32A, the second platen base 32B, and the third platen base. The first platen 31A, the second platen 31B, and the third platen 31C have different lengths in the paper width direction (Y-axis direction), but the other configurations have substantially the same configuration. The first platen 31A will be described as an example.

  Both the platen 31 and the platen base 32 are injection-molded with resin. Here, the reason why the platen 31 and the platen base 32 were not manufactured with a metal material is that the shape of the platen 31 is a complicated shape. This is because it is difficult to ensure high component accuracy.

  The bottom of the first platen base 32A includes a plurality of bottom openings 322. The internal space of the first platen base 32 </ b> A communicates with the internal space of the support member 33. Similarly, the other platen bases also have a bottom opening 322 communicating with the internal space of the support member 33, so that the internal space of the first platen base 32A, the internal space of the second platen base 32B, and the third platen base The internal space communicates with the inside so as to be movable outside the air.

  The first platen 31A is provided with a support surface 312 for supporting the paper S to be transported and a groove 313 for preventing liquid such as discarded ink from coming into contact with the paper S being transported. The groove portion 313 is provided with a first suction hole 314 that serves both as ink suction and paper suction. The first suction hole 314 penetrates from the upper part of the first platen 31A in the lower direction (Z-axis direction). Also. The first platen 31A is provided with a plurality of second suction holes 315 and third suction holes 316 on the support surface 312 that supports the conveyed paper S.

  The first platen base 32A is provided with a plurality of protrusions 321 protruding on both sides in the transport direction of the paper S, and the first platen 31A is provided with a hook-like member 311 for engaging with the protrusions 321. It has been. A stretched and continuous sponge 34A is provided around the upper edge of the first platen base 32A. Then, the hook-shaped member 311 is engaged with the protruding portion 321 and the first platen 31 is fixed to the first platen base 32A. At this time, the sponge 34A is compressed, so that the airtightness between the first platen 31A and the first platen base 32A is enhanced.

  The ink jet printer 1 of the present embodiment includes a first belt unit 47 below a region through which an end of the paper S supplied along the fixed guide portion passes in the paper width direction. A second belt unit 48 is provided on the lower side of the region through which the end on the side guided by the moving guide portion 46 passes. For this reason, paper dust that is likely to be generated at both ends of the conveyed paper S is moved to the lower side of the first belt unit 47 and the second belt unit 48 and scraped off. At this time, the brush 49 does not necessarily need to be provided, and even if the brush 49 is not provided, the paper dust attached to the lower surfaces of the first belt 47a and the second belt 48a is dropped by its own weight. Also good. Here, a phenomenon that occurs between the platen 31 and the nozzle plate NP of the head 41 will be described.

  FIG. 6 is a diagram for explaining a phenomenon that occurs between the platen 31 and the nozzle plate NP of the head 41. FIG. 6 shows the platen 31, the nozzle plate NP of the head 41, and the paper S conveyed on the platen 31.

When the sheet S passes over the platen 31, static electricity is generated due to friction generated between the platen 31 and the sheet S.
In particular, in the large-sized inkjet printer 1 as in the present embodiment, since the wide paper S is mainly conveyed in the paper width direction, the paper S tends to float from the platen due to undulation or the like. Therefore, in order to prevent the sheet S from floating from the platen 31, the sheet S is sucked from the first suction hole 314 to the third suction hole 316 described above. By this suction, the frictional force between the sheet S and the platen 31 is increased, and static electricity generated in the platen 31 is increased. In this way, if the platen 31 is charged and charge removal is not performed, a potential difference occurs between the nozzle plate NP of the head 41 and an electric field is generated.

  On the other hand, when the paper S passes, the paper powder Sa adhering mainly to the end portion of the paper S also adheres to the first belt 47a and the second belt 48a. As shown in FIG. 5, the paper powder Sa adhering to the paper S and the first belt 47a and the second belt 48a undergoes dielectric polarization as shown in FIG. The dielectrically polarized paper powder Sa is easily adsorbed to the platen 31 or the nozzle plate NP.

  The nozzle plate NP is provided with a nozzle (not shown) that ejects ink. However, when the paper dust Sa is adsorbed to the nozzle plate NP, the adsorbed paper dust Sa may cause clogging of the nozzles. When the nozzle is clogged, ink is not ejected from the clogged nozzle, so the desired dot that should be formed is not formed in the pixel that the clogged nozzle is responsible for, and so-called dot omission occurs, which is good Cannot form an image. For this reason, the more paper dust Sa exists between the platen 31 and the nozzle plate NP of the head 41, the more easily the paper dust Sa is adsorbed to the nozzle plate NP, and dot dropout is more likely to occur.

  In order to prevent such dot missing, for example, cleaning is performed by forcibly ejecting ink from the nozzles at the retracted position of the carriage 43, but the cleaning consumes ink wastefully. In addition, there is a disadvantage that the discharge amount of waste liquid (waste ink) increases due to forced ejection of ink. Therefore, it is desirable to reduce the amount of paper dust Sa existing between the nozzle plate NP of the head 41.

  For this reason, in the inkjet printer 1 of the present embodiment, the first belt 47a and the second belt 48a are provided on the upstream side of the platen 31 provided in the recording unit 40.

  According to the ink jet printer 1 of the present embodiment, the sheet S is positioned below the end in the width direction of the sheet S to be transported, moved in the transport direction on the upper side to transport the sheet S, and transported on the lower side. Since the first belt 47a and the second belt 48a that circulate by moving in the opposite direction are provided, the conveyed paper S comes into contact with the first belt 47a and the second belt 48a, and the first belt The paper dust Sa adhering to the nozzle plate NP of the head 41 is moved downward by moving the paper dust Sa adhering to the 47a and the second belt 48a to the lower side of the first belt 47a and the second belt 48a. Can be reduced. For this reason, it is possible to provide the ink jet printer 1 capable of suppressing the paper powder Sa from flying when the paper S is conveyed.

Further, a brush 49 for removing deposits attached to the first belt 47a and the second belt 48a, for example, paper dust Sa, is in contact with the lower side of the first belt 47a and the second belt 48a. Further, it is possible to reduce the paper dust Sa existing between the head 41 and the nozzle plate NP more reliably. The first belt 47a and the second belt 48a are driven by a transport roller 45 that transports the paper S. Therefore, it is not necessary to provide a drive unit only for driving the first belt 47a and the second belt 48a. For this reason, it is possible to reduce the size of the inkjet printer 1 and to reduce the cost.

In the above-described embodiment, the brush 49 for removing deposits such as paper dust by contacting the lower surfaces of the first belt 47a and the second belt 48a below the first belt 47a and the second belt 48a. Although the example which provided this was demonstrated, it does not restrict to this.
For example, instead of the brush 49, a sponge 49a containing a colorless liquid for moistening the first belt 47a and the second belt 48a may be provided to suppress generation of static electricity.

FIG. 7 is a diagram for explaining the state of paper dust when a sponge 49a containing a colorless liquid is provided.
As described above, the first belt 47a and the second belt 48a are in contact with the sponge 49a containing a colorless liquid as a moisture member on the lower side, and both ends of the conveyed paper S pass through. It is arranged in the area to be. Here, the colorless liquid is not particularly limited as long as it is colorless and can give moisture to the first belt 47a and the second belt 48a, such as water and glycerin.

  By adopting such a configuration, both end portions of the conveyed paper S come into contact with the first belt 47a and the second belt 48a that are wet before reaching the platen 31. For this reason, at least the region through which the edge of the paper S passes is not charged and no static electricity is generated. For this reason, it is possible to provide the ink jet printer 1 in which the paper dust Sa is less likely to be adsorbed by the nozzle plate NP and nozzle clogging is less likely to occur, and dot missing is less likely to occur.

  According to such an ink jet printer 1, the sponge 49a containing colorless liquid for moistening the first belt 47a and the second belt 48a is in contact with the lower side of the first belt 47a and the second belt 48a. Therefore, even if friction occurs between the first belt 47a and the second belt 48a and the paper S, static electricity hardly occurs. For this reason, when the paper dust Sa adhering to the first belt 47a and the second belt 48a is conveyed to the lower side of the first belt 47a and the second belt 48a, the first belt 47a and the second belt 48a are more surely provided. It is possible to drop from.

FIG. 8 is a perspective view showing a modification of the first belt unit and the second belt unit.
Further, even if the first belt 55 and the second belt 56 are made of a conductive member, for example, metal, and grounded through, for example, a metal brush 57, etc., static electricity hardly occurs. Paper dust Sa and the like adhering to the belt 55 and the second belt 56 can be more reliably dropped from the first belt 55 and the second belt 56.

  Further, according to the liquid ejection method of the present embodiment, the upper side of the sheet S conveyed in the conveying direction along the platen 31 moves in the conveying direction below the end in the width direction of the sheet S, and the lower side Since the first belt 47a and the second belt 48a whose sides move in the direction opposite to the conveyance direction circulate and the sheet S is conveyed in the conveyance direction, the paper powder Sa of the sheet S being conveyed becomes the first belt 47a and By adhering to the second belt 48a, the adhering material such as paper dust Sa adhering to the first belt 47a and the second belt 48a is moved below the first belt 47a and the second belt 48a and dropped downward. Paper dust Sa existing between the head 41 and the platen 31 can be reduced. For this reason, it is possible to provide a liquid ejection method capable of suppressing the deposits such as paper dust Sa from flying when the paper S is conveyed.

=== Other Embodiments ===
In the above-described embodiment, the example in which the second belt 48a has a wider width than the first belt 47a so as to include the entire region through which the end of the sheet S that can be transported by the inkjet printer 1 passes is described. The second belt 48a may be formed in the same width as the first belt 47a and may move in the paper width direction in conjunction with the movement guide portion 46.

  In the above-described embodiment, the ink jet printer 1 has been described as the liquid ejecting apparatus. However, the present invention is not limited to this, and is not limited to this. It is also possible to embody the present invention in a liquid ejecting apparatus that ejects or ejects a fluid. For example, color filter manufacturing apparatus, dyeing apparatus, fine processing apparatus, semiconductor manufacturing apparatus, surface processing apparatus, three-dimensional modeling machine, gas vaporizer, organic EL manufacturing apparatus (especially polymer EL manufacturing apparatus), display manufacturing apparatus, film formation You may apply the technique similar to the above-mentioned embodiment to the various apparatuses which applied inkjet technology, such as an apparatus and a DNA chip manufacturing apparatus. These methods and manufacturing methods are also within the scope of application.

  The above-described embodiments are for facilitating the understanding of the present invention, and are not intended to limit the present invention. The present invention can be changed and improved without departing from the gist thereof, and it is needless to say that the present invention includes equivalents thereof.

<About the head>
The method of ejecting ink is not limited to the method of ejecting using a piezoelectric element, and other methods such as a method of generating bubbles in the nozzle by heat may be used.

1 Inkjet printer,
10 supply section, 11 assembly, 13 spindle, 14 transport path,
20 cartridge holder, 22 holder cover,
30 platen unit, 31 platen, 31A first platen,
31B 2nd platen, 31C 3rd platen,
32 platen base, 32A first platen base, 32B second platen base,
33 support member, 34A sponge,
40 recording section, 41 head, 42 top cover, 43 carriage,
44 Front cover, 45 Conveying roller, 46 Moving guide,
47 first belt unit, 47a first belt, 47b drive shaft,
47c driven shaft, 47d belt shaft gear, 47e relay gear,
47f roller shaft gear, 48 second belt unit, 48a second belt,
48b drive shaft, 48c driven shaft, 48d belt shaft gear, 48e relay gear,
48f roller shaft gear, 49 brush, 49a sponge,
50 nip part, 51 discharge roller, 51a
51b roller roller, 55 first belt, 56 second belt,
57 Metal belt,
60 discharge section, 61 cutter device, 62 regulating member, 63 cutter unit,
70 legs, 80 operation panel, 82 switch, 84 display,
90 housing, 91 roll cover,
311 hook-shaped member, 312 support surface, 313 groove, 314 first suction hole,
315 second suction hole, 316 third suction hole,
321 protrusion, 322 bottom opening,
NP nozzle plate, R roll, S paper, Sa paper dust,

Claims (6)

A head provided with a nozzle for discharging liquid onto a medium conveyed in the conveying direction;
A resin platen provided facing the head and along which the medium is disposed;
The medium to be transported is positioned below the end in the width direction of the medium that intersects the transport direction, moves in the transport direction on the upper side, and moves in the opposite direction to the transport direction on the lower side. An annular belt body that circulates by
A liquid ejecting apparatus comprising: The liquid ejection device according to claim 1,
The liquid discharge apparatus according to claim 1, wherein a deposit removing member for removing deposits on the annular belt body is in contact with the lower side of the annular belt body. The liquid ejection device according to claim 1,
A liquid ejecting apparatus according to claim 1, wherein a moisture member for moistening the annular belt body is in contact with the lower side of the annular belt body. The liquid ejection device according to claim 1 or 2, wherein
The liquid ejecting apparatus according to claim 1, wherein the annular belt body is electrically conductive and grounded. A liquid ejection apparatus according to any one of claims 1 to 4,
A conveyance drive unit for conveying the medium;
The liquid ejecting apparatus, wherein the annular belt body is driven by the transport driving unit. In the medium conveyed in the conveying direction along the resin platen, under the end in the width direction of the medium intersecting the conveying direction,
An annular belt body whose upper side moves in the transport direction and whose lower side moves in the direction opposite to the transport direction circulates in the medium transported in the transport direction,
A liquid discharge method comprising discharging liquid from a nozzle facing the platen.

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