JP2013022898A - Liquid ejection apparatus, and method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid ejection apparatus configured to prevent nozzle-clogging due to the powdery body of a medium shaved in conveying, with an inexpensive method.SOLUTION: The liquid ejection apparatus includes: a head including the nozzles for ejecting the liquid to the medium being conveyed in a conveying direction; a resin platen 31 provided to be opposed to the head, along which the medium is located; and metal grounding members 47 and 48 provided on the platen 31 to be positioned under the end part of the medium in the width direction orthogonal to the conveying direction, and grounded.

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 platen is subjected to antistatic treatment so that the static electricity generated by the friction between the conveyed medium and the platen does not clog the nozzles provided in the print head when the medium passes and the powder etc. It has been subjected.

JP 2000-289290 A

  In order to form a good image with an ink jet printer, it is necessary to keep the distance between the medium to be transported and the head properly and transport it smoothly. For this reason, the platen that forms the conveyance path of the medium draws the medium from below the platen and keeps the frictional resistance during conveyance small in order to keep the medium along the platen and keep the distance from the head appropriately. The shape is complicated, for example, ribs are provided. In order to carry out antistatic treatment on a platen with such a complicated shape, there is a problem that the cost may increase if the surface is formed with a resin mixed with a conductive substance or an antistatic coating is applied. is there. Further, when the platen is manufactured from metal, there is a problem that processing is difficult due to a complicated shape, and the cost may increase.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a liquid discharge apparatus and a liquid discharge apparatus that prevent clogging of nozzles by powder or the like flying from a conveyed medium by an inexpensive method. It is to provide a method.

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;
A metal grounding member that is disposed on the platen and is grounded under an end in the width direction of the medium that intersects the transport direction in the transported medium;
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 of the platen unit in this embodiment. It is a top view of the platen unit in this embodiment. It is a figure explaining the state of paper dust when the 1st grounding member and the 2nd grounding member are not provided in the platen. It is a figure explaining the state of paper dust when the 1st grounding member and the 2nd grounding member are provided.

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;
A metal grounding member disposed on the platen and positioned below the end in the width direction of the medium that intersects the transport direction in the medium to be transported; and
It is a liquid discharge apparatus characterized by having.

  According to such a liquid ejection apparatus, since the platen is made of resin, it can be easily and inexpensively manufactured even if it has a complicated shape. Further, on the platen along which the medium to be transported is placed, a metal grounding member that is grounded is provided below the end in the width direction of the medium that intersects the transport direction. Even if the platen is made of resin, it is possible to prevent the generation of static electricity in the vicinity of the edge of the medium being conveyed. For this reason, it is possible to prevent the powder and the like from flying from the end of the conveyed medium, and it is possible to suppress the occurrence of clogging of the nozzle provided in the head due to the powder and the like. In addition, since the grounding member is located below the edge of the medium, the entire platen is made of metal, or less expensive than the case where the entire platen is formed of a resin mixed with a conductive material. Can be manufactured. For this reason, it is possible to provide a liquid ejecting apparatus that prevents clogging of the nozzle by powder generated from the medium by an inexpensive method.

Such a liquid ejection device,
A plurality of types of media having different widths can be conveyed;
The grounding members are respectively provided below both ends of the medium in the width direction,
One of the grounding members is preferably fixed, and the other grounding member is preferably movable according to the width of the medium to be transported.

  According to such a liquid ejecting apparatus, since the grounding members are provided below the both ends of the medium, one grounding member is fixed, and the other grounding member is movable, the distance between the two grounding members Can be changed as appropriate. For this reason, by moving the other grounding member according to a plurality of types of media having different widths, the grounding members are respectively located under both end portions in the width direction of the transported media having different widths. Can be located. For this reason, it is possible to more effectively prevent static electricity from being generated near the edge of the medium. At this time, since one of the two grounding members is fixed and the other is movable, it is possible to change the interval between the two grounding members with a simpler configuration than when both are moving.

Such a liquid ejection device,
A guide member that is provided so as to be movable in the width direction according to the width of the medium to be conveyed, and that guides an end of the medium;
It is preferable that the other grounding member moves integrally with the guide member.

  According to such a liquid ejecting apparatus, it is provided so as to be movable in the width direction according to the width of the conveyed medium, and the guide member for guiding the end of the medium and the other grounding member are integrally provided. By simply moving the guide member in accordance with the width of the medium, the grounding member can be easily disposed under the end of the medium.

Further, in the medium transported in the transport direction along the resin platen, the end in the width direction of the medium intersecting the transport direction,
The medium which is disposed on the platen and is conveyed in the conveyance direction while being contacted on a grounded metal grounding member,
A liquid discharge method is characterized in that liquid is discharged from a nozzle facing the platen.

  According to such a liquid ejection method, the medium from which the liquid is ejected from the nozzle that ejects the liquid is a metal that is grounded with the end in the width direction of the medium that intersects the transport direction being disposed on the platen. Since the sheet is transported in the transport direction while being in contact with the grounding member made of metal, it is possible to prevent the generation of static electricity in the vicinity of the end of the medium even when transported along the resin platen. For this reason, it is possible to prevent the powder and the like from flying from the end of the conveyed medium, and it is possible to suppress the occurrence of clogging of the nozzle provided in the head due to the powder and the like. In addition, since the grounding member is located below the edge of the medium, the entire platen is made of metal, or less expensive than the case where the entire platen is formed of a resin mixed with a conductive material. Can be manufactured. For this reason, it is possible to provide a liquid discharge method that prevents clogging of the nozzle by powder generated from the medium by an inexpensive method.

=== 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 so as to be 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 configured so that a plurality of types of paper S having different paper widths can be transported without meandering by moving and adjusting the movement guide unit 46 according to the paper width. Has been. Further, the movement guide portion 46 is provided with a first grounding member 47 made of a metal plate that extends from the lower surface of the movement guide portion 46 to the downstream side in the transport direction and is grounded through, for example, a metal frame. It has been.

  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. 3 is a perspective view of the platen unit 30 in the present embodiment. FIG. 3 shows a platen 31, a platen base 32, and a support member 33 as a minimum configuration constituting the platen unit 30 of the present embodiment. FIG. 3 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. 4 is a top view of the platen unit 30 in the present embodiment. FIG. 4 shows that the platen 31 includes a first platen 31A, a second platen 31B, and a third platen 31C and is 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 sheet S conveyed on the first platen 31A is provided in the supply unit 10 on the operation panel 80 side in the sheet width direction and is positioned with reference to a fixed guide unit (not shown). That is, regardless of the size of the paper S, an area on the support surface 312 through which the end of the paper S passes exists on the operation panel 80 side in the paper width direction. In the region where the end of the sheet S of the support surface 312 passes, a second grounding member 48 made of a metal plate grounded via a metal frame or the like is provided.

  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 inkjet printer 1 according to the present embodiment includes a second grounding member 48 on the platen 31 in a region through which an end portion in the paper width direction of the paper S supplied along the fixed guide portion passes. The first grounding member 47 is connected to the platen 31 in the region through which the end on the side guided by the transfer guide unit 46 passes. For this reason, in the vicinity of both ends of the sheet S to be conveyed, even if friction occurs between the sheet S and the platen 31 due to the conveyance of the sheet S, static electricity is not generated. Here, a phenomenon that occurs when the first grounding member 47 and the second grounding member 48 are not provided will be described.

  FIG. 5 is a diagram illustrating the state of paper dust when the first grounding member 47 and the second grounding member 48 are not provided on the platen 31 ′. FIG. 5 shows the platen 31 ′, the nozzle plate NP ′ of the head 41 ′, and the sheet S conveyed on the platen 31 ′.

  When the first grounding member 47 and the second grounding member 48 are not provided on the platen 31 ′, static electricity is generated due to friction generated between the platen 31 ′ and the paper S when the paper S passes over the platen 31 ′. To do.

  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. By this suction, the frictional force between the sheet S and the platen 31 ′ increases, and static electricity generated on the platen 31 ′ increases. 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 dust Sa flies mainly from the end of the paper S. When the paper powder Sa flies between electric fields, the paper powder Sa is dielectrically polarized as shown in FIG. The dielectrically polarized paper powder Sa is 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.

  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 prevent the paper powder Sa from adhering to the nozzle plate NP ′.

  In consideration of the paper dust Sa adhering process as described above, it is desirable to suppress the charging of the platen 31. For this reason, the inkjet printer 1 according to the present embodiment includes the first ground member 47 and the second ground member 48.

FIG. 6 is a diagram for explaining the state of the paper dust when the first grounding member 47 and the second grounding member 48 are provided.
As described above, the first grounding member 47 and the second grounding member 48 are grounded via, for example, a metal frame, and are disposed in a region through which both ends of the conveyed paper S pass.

  With such a configuration, both end portions of the sheet S to be conveyed are in contact with the first grounding member 47 and the second grounding member 48 on the platen 31. For this reason, since the charge can be released from the first grounding member 47 and the second grounding member 48 with which the end of the paper S comes into contact, at least the region through which the end of the paper S passes is not charged and the nozzles of the head 41 No electric field is generated between the plate NP and the platen 31. 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.

  That is, according to the inkjet printer 1 of this embodiment, since the platen 31 is made of resin, it can be easily and inexpensively manufactured even if it has a complicated shape. Further, on the platen 31 along which the sheet S to be conveyed is placed, the metal first grounding member 47 that is grounded and positioned below the end in the sheet width direction of the sheet S that intersects the conveying direction, and Since the second grounding member 48 is disposed, it is possible to prevent the generation of static electricity in the vicinity of the end of the sheet S to be conveyed even if the platen 31 is made of resin. For this reason, it is possible to prevent the paper dust Sa from flying at the end of the conveyed paper S, and it is possible to suppress clogging of the nozzles provided in the head 41 due to the paper dust Sa. It is. Further, since the first grounding member 47 and the second grounding member 48 are located below the end of the sheet S, the entire platen 31 is formed of metal, or the entire platen 31 is mixed with a conductive substance. Compared with the case where it forms with the resin, it can manufacture cheaply. For this reason, it is possible to provide the inkjet printer 1 which prevents the nozzle clogging by the paper dust Sa flying from the conveyed paper S by an inexpensive method.

  Further, the first grounding member 47 and the second grounding member 48 are respectively provided below both ends of the paper S. The first grounding member is movable and the second grounding member 48 is fixed. It is possible to appropriately change the distance between 47 and the second grounding member 48. For this reason, by moving the first grounding member 47 in accordance with a plurality of types of sheets S having different widths, the widths of the sheets S are different from each other and below the both ends in the sheet width direction. The first grounding member 47 and the second grounding member 48 can be positioned respectively. For this reason, it is possible to more effectively prevent static electricity from being generated near the edge of the paper S. At this time, since the first grounding member 47 is movable and the second grounding member 48 is fixed, the distance between the first grounding member 47 and the second grounding member 48 can be reduced with a simpler configuration than when both are moved. It is possible to change.

  Further, since the first grounding member 47 is provided so as to be movable in the paper width direction according to the width of the sheet S to be conveyed, and is provided integrally with the movement guide portion 46 that guides the end of the sheet S, the movement guide The first grounding member 47 can be easily disposed under the edge of the paper S simply by moving the portion 46 according to the width of the paper S.

  Further, according to the liquid ejection method of the present embodiment, the sheet S on which ink is ejected from the nozzles that eject ink has the end in the width direction of the sheet S intersecting the transport direction arranged on the platen 31. Since the sheet is conveyed in the conveying direction while being in contact with the first grounding member 47 and the second grounding member 48, static electricity is generated in the vicinity of the edge of the sheet S even if the sheet is conveyed along the resin platen 31. Can be prevented. For this reason, it is possible to prevent the paper dust Sa and the like from flying from the end of the conveyed paper S, and to suppress the clogging of the nozzles provided in the head 41 due to the paper dust Sa and the like. Is possible. Further, since the first grounding member 47 and the second grounding member 48 are located below the end of the sheet S, the entire platen 31 is formed of metal, or the entire platen 31 is mixed with a conductive substance. Compared with the case where it forms with the resin, it can manufacture cheaply. For this reason, it is possible to provide a liquid ejection method that prevents clogging of the nozzles by paper dust Sa generated from the paper S by an inexpensive method.

=== Other Embodiments ===
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 the fluid other than ink (liquid or liquid in which particles of functional material are dispersed, gel) 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 units, 31 platens, 31 'platens,
31A 1st 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, 41 'head, 42 top cover,
43 Carriage, 44 Front cover, 45 Transport roller,
46 movement guide part, 47 1st grounding member, 48 2nd grounding member,
50 nip part, 51 discharge roller, 51a
51b roller roller,
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, NP 'nozzle plate, R roll,
S paper, Sa paper dust

Claims (4)

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;
A metal grounding member disposed on the platen and positioned below the end in the width direction of the medium that intersects the transport direction in the medium to be transported; and
A liquid ejecting apparatus comprising: The liquid ejection device according to claim 1,
A plurality of types of media having different widths can be conveyed;
The grounding members are respectively provided below both ends of the medium in the width direction,
One of the grounding members is fixed, and the other grounding member is movable according to the width of the transported medium. The liquid ejection device according to claim 2,
A guide member that is provided so as to be movable in the width direction according to the width of the medium to be conveyed, and that guides an end of the medium;
The liquid discharge apparatus according to claim 1, wherein the other grounding member moves integrally with the guide member. In the medium transported in the transport direction along the resin platen, the end in the width direction of the medium intersecting the transport direction,
The medium which is disposed on the platen and is conveyed in the conveyance direction while being contacted on a grounded metal grounding member,
A liquid discharge method comprising discharging liquid from a nozzle facing the platen.

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