JP2017109811A - Recording device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a recording device capable of moving a static elimination member to a position spaced apart from a transportation section.SOLUTION: A printer comprises: a transportation belt 51 transporting a sheet in a transportation direction; a recording section performing recording onto the sheet transported by the transportation belt 51; and a static elimination section 110 being provided closer to an upstream side in the transportation direction than the recording section, and having a base material section 112 extending in a direction intersecting with the transportation direction of the sheet and a static elimination brush 111 eliminating static electricity of a printing surface of the sheet by protruding from an outer surface of the base material section 112 and being brought into contact with the sheet transported by the transportation belt 51. The static elimination section 110 is constituted so as to be able to switch a first state where the transportation belt 51 and the static elimination brush 111 are close to each other and a second state where the transportation belt 51 and the static elimination brush 111 are spaced apart from each other in comparison with the first state by a portion facing the transportation belt 51 out of the base material section 112 being displaced.SELECTED DRAWING: Figure 15

Description

  The present invention relates to a recording apparatus including a charge removal unit having a charge removal brush that can contact a medium conveyed by a conveyance unit.

  2. Description of the Related Art Conventionally, a recording apparatus that includes a conveyance unit that conveys a sheet that is an example of a medium and that records (prints) an image or the like by ejecting ink onto a printing surface of the sheet conveyed by the conveyance unit is known. . As an example of a transport unit, a transport unit including an endless transport belt suspended around a charging roller is known. Since the belt surface of the transport belt is charged by the charging roller, the transport belt can be transported by adsorbing the surface opposite to the printing surface of the paper transported by the action of static electricity to the belt surface.

  For this reason, it is known to provide a brush-like static eliminating member that removes charges from the printing surface of the paper in order to increase the paper adsorption force (electrostatic adsorption force) due to the action of static electricity by the conveyor belt (for example, Patent Document 1).

JP 2002-46310 A

  By the way, in the recording apparatus of Patent Document 1, the static elimination member is close to the conveyance belt. For this reason, for example, when a paper jam occurs on the transport belt, when the paper is removed, the printing surface of the paper to which undried ink is adhered, or the transport belt comes into contact with the static elimination member, and the static elimination member becomes dirty. There was a risk of it. And if it prints in the state where the static elimination member is dirty, there is a possibility that print quality may fall.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a recording apparatus capable of moving the charge removal member to a position away from the transport unit.

Hereinafter, means for solving the above-described problems and the effects thereof will be described.
A recording apparatus that solves the above-described problems is provided in a transport unit that transports a medium in a transport direction, a recording unit that records on the medium transported by the transport unit, and an upstream side of the recording unit in the transport direction. , A long member extending in a direction intersecting with the conveyance direction of the medium, and a static elimination that neutralizes the recording surface of the medium by contacting the medium conveyed by the conveyance unit protruding from the outer surface of the long member A neutralization unit having a member, wherein the neutralization unit is disposed in a first state in which the conveyance unit and the neutralization member are close to each other by displacing a portion of the elongated member that faces the conveyance unit. The transport unit and the charge removal member are configured to be switchable between a second state in which the transport unit and the charge removal member are separated from the first state.

  According to the above configuration, the first state in which the discharging unit is close to the discharging unit due to the displacement of the long member, and the second state in which the transferring unit and the discharging member are spaced apart from the first state. Can take. For this reason, a static elimination member can be moved to the position away from the conveyance part.

In the recording apparatus, it is preferable that the static elimination unit has a plurality of regions on the long member, each having a different protrusion height of the static elimination member.
According to the above configuration, since the first member can be switched between the first state and the second state by moving the long member so that the regions where the protruding heights of the discharging member are different from each other, the discharging unit can be switched. The structure can be simplified.

In the recording apparatus, the long member is preferably endless.
According to the said structure, since a base material part is endless, since a 1st state and a 2nd state can be switched by circulating a base material part, the structure of a static elimination part is simplified. Can do.

In the recording apparatus, it is preferable that at least one hole is formed in the long member.
According to the said structure, since the position of a elongate member can be grasped | ascertained by detecting the hole formed in the elongate member, a 1st state and a 2nd state can be formed appropriately. .

In the recording apparatus, it is preferable that the neutralizing member is not provided in a portion of the long member that faces the conveying unit when the neutralizing unit is in the second state.
According to the above configuration, since the static elimination member is not provided in the portion of the long member that faces the conveyance unit, the configuration of the static elimination unit is simplified compared to the case where the static elimination member is provided on the entire long member. can do.

  Further, in the recording apparatus, a conveyance belt that is provided in the conveyance unit and conveys the medium in the conveyance direction, a drive roller that rotationally drives the conveyance belt, and the charge removal unit around the drive roller. A belt moving unit that rotates in a direction approaching and away from the static eliminator, and a control unit that controls the static eliminator and the belt moving unit, wherein the control unit causes the static eliminator to be in a first state. When switching from the first state to the second state, the belt moving unit rotates the transport belt in a direction away from the neutralization unit, and then switches the neutralization unit from the first state to the second state. Is preferred.

  According to the above configuration, when the static elimination unit is switched from the first state to the second state, since the transport belt is separated from the static elimination member in advance, the static elimination member when switching from the first state to the second state. Does not touch the conveyor belt. For this reason, it can suppress that a static elimination part and a conveyance belt wear by contact.

1 is a front view illustrating a schematic structure of an embodiment of a recording apparatus. FIG. 2 is a front view illustrating a state in which the conveyance belt is separated from the recording unit and the cap is in contact with the recording unit in FIG. The perspective view which looked at the conveyance part and the static elimination apparatus from the conveyance direction upstream. The perspective view which looked at the conveyance part and the static elimination apparatus from the conveyance direction downstream. FIG. 6 is a perspective view illustrating a transport unit in which a transport belt has moved to a first position where recording is performed by a recording unit. The perspective view which shows the belt moving part of the state which moved the conveyance belt to the 1st position. The perspective view which shows the conveyance unit which the conveyance belt moved to the 2nd position away from the recording part. The perspective view which shows the belt moving part of the state which moved the conveyance belt to the 2nd position. The perspective view which shows the cleaning unit which has a cleaning member, and a charging roller. The perspective view which expands and shows the contact part of a cleaning unit and a charging roller. The front view which expands and shows the contact part of a cleaning unit and a charging roller. The perspective view which shows a static elimination part. The front view which shows a static elimination part. FIG. 13 is a cross-sectional view taken along line D14-D14 in FIG. The front view which shows a state when a static elimination part exists in a 1st state. The front view which shows a state when a static elimination part exists in a 2nd state. The perspective view which shows a foreign material removal apparatus. The perspective view which expands and shows the duct opening | mouth of a foreign material removal apparatus. FIG. 18 is a cross-sectional view taken along line D19-D19 in FIG. The perspective view which shows the internal structure of the main-body part of a foreign material removal apparatus. 6 is a flowchart illustrating a cleaning operation for cleaning the conveyance belt. The schematic diagram for demonstrating the 1st state of cleaning operation | movement. The schematic diagram for demonstrating the 2nd state of cleaning operation | movement. The schematic diagram for demonstrating the 3rd state of cleaning operation | movement. The schematic diagram for demonstrating the force which acts on a static elimination part. The schematic diagram which shows the relationship between a 1st guide member and a 2nd guide member. The side view which shows the internal structure of a printer. The perspective view which shows the structure of the duct port of a modification. The perspective view which shows the structure of the foreign material removal apparatus of a modification. Sectional drawing which shows the relationship between the duct opening | mouth of a modification, and a static elimination part. The schematic diagram which shows the structure of the static elimination part of a modification. The schematic diagram which shows the structure of the static elimination part of a modification. Sectional drawing which shows the structure of the base material part of a modification. Sectional drawing which shows the structure of the base material part of a modification. The schematic diagram which shows the relationship between the 1st guide member and 2nd guide member of a modification. The schematic diagram which shows the relationship between the 1st guide member and 2nd guide member of a modification. The front view which shows the structure of the static elimination part of a modification. FIG. 38 is a sectional view taken along line D33-D33 in FIG. The front view when the static elimination part of a modification is in a 1st state. The front view when the static elimination part of FIG. 39 exists in a 2nd state.

  Hereinafter, as an embodiment of the recording apparatus, an ink jet printer that includes a recording unit that ejects ink and prints (records) an image including characters and figures by ejecting ink onto a sheet that is an example of a medium. This will be described with reference to the drawings.

  As shown in FIG. 1, a printer 11 as an example of a recording apparatus according to the present embodiment includes a housing 12 that has a substantially rectangular parallelepiped shape including a plurality of exterior cases as an apparatus main body. The printer 11 includes a conveyance path 13 for conveying the paper 14 in the housing 12 as indicated by a thick dashed line in FIG. Then, along the transport path 13, a plurality of roller pairs that transport the paper 14, and a transport belt 51 that transports the paper 14 while supporting the paper 14 from the lower side −Z side (lower side) in the vertical direction Z are transported. A recording unit 18 that performs recording by discharging ink to the paper 14 is mounted on the housing 12. The conveyor belt 51 is moved to a first position facing the recording unit 18 across the conveyance path 13 by the belt moving unit 60 (see FIGS. 3 and 5), that is, in a usable state. 12 is attached.

  In the present embodiment, the recording unit 18 has a so-called liquid ejection head having a longitudinal direction that is a width direction X that intersects (here, orthogonally intersects) the transport direction Y of the paper 14 and can simultaneously eject ink over the longitudinal direction. It is considered as a line head. In order to facilitate the following description, in the width direction X, the left direction when viewed from the upstream side in the transport direction Y (the direction toward the front side of the paper surface) is defined as the + X direction, and viewed from the upstream side in the transport direction Y. The right direction (the direction facing the back side of the page) is defined as the −X direction.

  The recording unit 18, which is a line head, performs printing as a recording by ejecting ink from the upper side + Z side (upper side) toward the paper 14 that is conveyed while being supported by the conveying belt 51. The position of the conveyor belt 51 when the recording unit 18 performs printing on the paper 14, that is, the first position where the conveyor belt 51 faces the recording unit 18 is referred to as a recording position KP.

  The conveyance path 13 includes a first supply path 21 and a second supply path 22 that are upstream of the recording unit 18 in the conveyance direction Y, and a third supply path 23, a branch path 24 that is downstream of the recording unit 18 in the conveyance direction Y, And a discharge path 25.

  The first supply path 21 is a path that connects the recording unit 18 and the paper cassette 27 that can be inserted into and removed from the bottom of the housing 12 on the bottom-Z side. In the first supply path 21, the pickup roller 28 that sends out the uppermost sheet 14 out of the sheets 14 that are stacked in the sheet cassette 27, and the sheet 14 that is sent out by the pickup roller 28 1 A separation roller 29 for separating the sheets one by one is provided. Further, a first supply roller pair 31 is provided on the downstream side in the transport direction Y from the separation roller 29.

  The second supply path 22 is a path that connects the recording section 18 and the insertion section 12 b that is exposed by opening the cover 12 a provided on one side surface of the housing 12. The second supply path 22 is provided with a second supply roller pair 32 that sandwiches and conveys the paper 14 inserted from the insertion portion 12b. Furthermore, a third supply roller pair 33 is provided at a position where the first supply path 21, the second supply path 22, and the third supply path 23 merge, and the third supply path 23 includes a fifth A supply roller pair 35 is provided.

  The third supply path 23 is a path provided so as to surround the recording unit 18, and is a path for returning the paper 14 that has once passed through the recording unit 18 to the upstream side from the recording unit 18 again. That is, a branch mechanism 36 is provided on the downstream side of the recording unit 18, and a branch roller pair 37 capable of both normal rotation and reverse rotation is provided on the branch path 24 branched from the discharge path 25. Is provided.

  The discharge path 25 is a path connecting the discharge port 38 through which the printed paper 14 is discharged and the recording unit 18. The paper 14 discharged from the discharge port 38 is placed on the placement table 39. The discharge path 25 is provided with at least one transport roller pair (in the present embodiment, a first transport roller pair 41 to a fifth transport roller pair 45). Further, a sixth transport roller pair 46 and a seventh transport roller pair 47 are also provided in the third supply path 23. The first transport roller pair 41 to the seventh transport roller pair 47 sandwich and transport the paper 14 to which ink is attached.

  That is, each of the first transport roller pair 41 to the seventh transport roller pair 47 includes a columnar driving roller 48 that rotates based on the driving force of the driving source, and a tooth that rotates following the rotation of the driving roller 48. And a roller 49. Further, the toothed roller 49 is provided alone without being paired with the driving roller 48. That is, the toothed roller 49 is provided in the third supply path 23, the branch path 24, and the discharge path 25 on the side through which the printing surface (recording surface) on which the paper 14 is printed passes. The toothed roller 49 is also provided between each of the first transport roller pair 41 to the seventh transport roller pair 47 in the transport direction, and between each transport roller pair and the recording unit 18. Is also provided. On the other hand, the driving roller 48 is provided on the non-printing surface (non-recording surface) on which the printing of the paper 14 is not performed, or on the side through which the first printed surface passes in the double-sided printing paper 14.

  In the present embodiment, the conveyance belt 51 at the recording position KP facing the recording unit 18 circulates in a state where the paper 14 is supported by electrostatic adsorption on the belt surface 51a serving as the outer peripheral surface thereof, thereby conveying the paper 14. To do. That is, the conveyor belt 51 is an endless belt stretched between two rollers, and one of the two rollers is a driving roller 52 that is rotated by a driving source, and the other roller Is a driven roller 53 that rotates as the belt circulates. As shown in FIG. 9, the charging roller 81 has a rubber layer formed on the surface of a metal roller shaft 81a, and a high pressure is applied by directly contacting a leaf spring (not shown) to the end of the roller shaft 81a. Is done. Alternatively, the charging roller 81 has a configuration in which a bearing portion 82a that receives the roller shaft 81a of the charging roller 81 is a conductive bearing (such as a conductive resin or a sintered bearing), and a high voltage is applied via the conductive bearing. May be. As shown in FIG. 1, the conveyor belt 51 circulates along with the rotation of the driving roller 52, and static electricity is charged to the conveyor belt 51 by the charging roller 81 that contacts the belt surface 51a during the rotation. The charging roller 81 preferably supplies a positive charge and a negative charge alternately to the transport belt 51. The transport belt attracts the sheet 14 to the upper + Z side flat belt surface 51 a formed between the driving roller 52 and the driven roller 53 by the charged static electricity, and the attracted sheet 14 is opposed to the recording unit 18. Then, it is transported in the transport direction Y.

  In the present embodiment, a first sensor Sa that detects the paper 14 on the upstream side in the transport direction Y and a second sensor Sb that detects the paper 14 on the downstream side in the transport direction Y are arranged with respect to the recording unit 18. It is installed. The first sensor Sa and the second sensor Sb are sensors (for example, optical sensors) that output a predetermined signal when the paper 14 is detected. For example, the transport belt 51 does not stagnate. , The second sensor Sb is turned “ON” after a predetermined time from when the first sensor Sa is turned “ON”.

  In the present embodiment, in the printer 11, a belt moving unit that moves the conveyance belt 51 from a recording position KP where printing is performed by the recording unit 18 to a second position that is farther from the recording unit 18 than the recording position KP. 60 is provided. That is, the belt moving unit 60 includes a link member 61 that operates in accordance with the driving of the first motor M1 as a driving source. The link member 61 is operated in accordance with the driving of the first motor M1, and the drive roller 52 is moved from the recording position KP, which is the first position, as shown by the two-dot chain line arrow in FIG. The center driven roller 53 side is swung downward-Z and moved to a second position farther from the recording unit 18 than the recording position KP.

  As shown in FIG. 2, in the present embodiment, a position where the conveyance belt 51 is rotated (swinged) about 90 degrees from the recording position KP about the drive roller 52 is defined as the second position, and this second position is used as the retracted position. Called TP. In the present embodiment, the belt surface 51a of the conveyor belt 51 has a horizontal posture that is a substantially horizontal surface at the recording position KP, and a vertical posture that is a substantially vertical surface along the vertical direction Z at the retreat position TP.

  By the way, the state in which the transport belt 51 is at the retracted position TP is a state in which printing on the paper 14 by the recording unit 18 is not performed. Therefore, in the printer 11, for example, in order to maintain the printing performance (for example, print quality) of the recording unit 18 by suppressing the drying of the ink in the recording unit 18, as shown in FIG. A cap moving mechanism 70 that covers the recording unit 18 by bringing the cap 71 into contact with the recording unit 18 from the lower side -Z side is provided.

  The cap moving mechanism 70 is used when a member 72 and a member 73 that hold a cap 71 capable of covering at least a portion for ejecting ink in the recording unit 18 with a closed space reciprocate along the transport direction Y. The cap 71 is moved (vertically moved) along the vertical direction Z by a link mechanism or a cam mechanism. As shown in FIG. 1, in a state where the recording unit 18 apart from the recording unit 18 is not covered, the cap 71 and the members (for example, the member 72 and the member 73) constituting the cap moving mechanism 70 are shown in the figure. As indicated by a two-dot chain line arrow, the belt is disposed at a position where it does not contact the conveyance belt 51 that moves (swings) between the recording position KP and the retreat position TP. In other words, the conveyance belt 51 is provided in the printer 11 so as not to come into contact with the cap 71 and the cap moving mechanism 70 that do not cover the recording unit 18 during the movement between the recording position KP and the retracted position TP. Yes.

  As shown in FIGS. 1 and 2, in the present embodiment, the printer 11 includes a cleaning unit 90 having a cleaning member 91 that removes dirt on the transport belt 51. That is, the cleaning unit 90 can be reciprocated along the transport direction Y in accordance with driving of a motor as a drive source (not shown), and the cleaning member 91 moves to the belt surface 51a of the transport belt 51 by moving in the transport direction Y. By contacting, dirt such as ink adhering to the belt surface 51a is wiped off and cleaned. The cleaning unit 90 will be described later with reference to FIG.

  As shown in FIGS. 3 and 4, in this embodiment, the transport belt 51, the driving roller 52, and the belt moving unit 60 that transport the paper 14 in the transport direction Y are one unit including the first motor M <b> 1. It is a constituent member of the transport unit 50. Further, a static elimination device 100 that neutralizes the printing surface of the paper 14 conveyed by the conveyance unit 50 is also provided in the same unit as the conveyance unit 50.

  5 and 6 show a state where the conveyance belt 51 whose belt surface 51a is substantially horizontal is at the recording position KP, as in FIG. Further, in FIG. 6, components related to the belt moving unit 60 that drives the conveyance belt 51 to rotate are illustrated.

  Similarly to the recording unit 18, the transport unit 50 has a longitudinal direction in the width direction X, a side plate portion 56R at the right end (−X direction side) in the longitudinal direction, and a left side in the longitudinal direction (+ X direction side). The side plate portions 56 </ b> L have unit frames 56 provided at the end portions thereof. The transport belt 51 and the belt moving unit 60 are assembled to the unit frame 56.

  In the transport unit 50, the transport belt 51 is moved to the recording position KP by the belt moving unit 60 as shown in FIGS. That is, as the worm gear 65 meshes with the worm 66 fixed to the motor shaft of the first motor M1, the worm gear 65 is fixed to one end thereof, and both ends thereof are connected to the side plate portions 56R and 56L of the unit frame 56. Rotating shafts 64 that are pivotally supported rotate. One end of the first link plate 63 is fixedly attached to the rotating shaft 64 at two locations separated in the longitudinal direction (width direction X), and the second link plate 63 is connected to the other end of the first link plate 63. One end of the link plate 62 is rotatably attached. The first link plate 63 and the second link plate 62 attached in this way constitute a link member 61.

  The driving roller 52 and the driven roller 53 that circulate the conveyance belt 51 are rotatably supported by the belt frame body 55 at both ends of the conveyance belt 51 in the belt width direction (here, the X direction). Has been. In this belt frame 55, the portion that rotatably supports the roller shaft end of the driven roller 53 is the base portion 55a when the portion that rotatably supports the roller shaft end of the drive roller 52 is the base portion 55a. On the other hand, it is set as the expansion-contraction part 55b which expands-contracts in the direction which connects the axis of the drive roller 52, and the axis of the driven roller 53. And in this embodiment, this expansion-contraction part 55b is urged | biased by the biasing member which is not shown in figure provided in the belt frame 55 in the direction which protrudes from the base | substrate part 55a. As a result, the driven roller 53 supported by the expansion / contraction part 55 b is urged so that the distance between the driving roller 52 and the driving roller 52 is increased, and the conveying belt 51 spanned between the driving roller 52 and the driven roller 53 is supported. Thus, a predetermined tension is applied. Thus, the conveyor belt 51 is stretched between the driving roller 52 and the driven roller 53.

  Further, the belt frame 55 is formed with a concave portion 57 which is a substantially rectangular groove in the base portion 55a. On the other hand, a substantially cylindrical pin 67 is attached to the other end of the second link plate 62, and the pin 67 enters and engages with the recess 57 of the belt frame 55. Therefore, as indicated by the solid line arrow CW in FIGS. 5 and 6, the rotation shaft 64 rotates clockwise as viewed from the + X direction side by driving the first motor M <b> 1. As the link plate 63 and the second link plate 62 move, the pin 67 attached to the second link plate 62 moves (swings) the belt frame 55. In this manner, the belt moving unit 60 moves the conveyor belt 51 to the recording position KP by moving the belt frame 55. The first motor M1 that operates the belt moving unit 60 is attached to the side plate portion 56L on the left side (+ X direction) side of the unit frame 56.

  5 and 6, the rotation shaft 64 rotates counterclockwise as viewed from the + X direction by driving the first motor M1, and the first rotation is accompanied by the rotation of the rotation shaft 64. As the link plate 63 and the second link plate 62 move, the pin 67 attached to the second link plate 62 moves the belt frame 55.

  As shown in FIGS. 7 and 8, the belt 51 is moved (swinged) to the same retracted position TP as in the state shown in FIG. At the retracted position TP, the conveyor belt 51 is housed in the unit frame 56 with the belt surface 51a being a substantially vertical surface along the vertical direction Z. In FIG. 8, components related to the belt moving unit 60 that rotationally drives the transport belt 51 are illustrated.

  As shown in FIGS. 6 and 8, in the present embodiment, the rotation of the first motor M1 is converted into the rotation of the worm gear 65 that meshes with the worm 66 attached to the rotation shaft (motor shaft). Therefore, the rotation shaft 64 to which the worm gear 65 is attached rotates at a smaller rotation angle than the rotation speed of the first motor M1 (rotation speed of the worm 66). In other words, the rotation shaft 64 can be rotated at a highly accurate rotation angle by the rotation of the first motor M1. Further, since the rotation direction of the worm gear 65 is a direction intersecting with the rotation direction of the worm 66, the rotation angle of the rotation shaft 64 is maintained while the rotation of the first motor M1 is stopped. As a result, for example, in the conveyance unit 50, the belt surface 51a of the conveyance belt 51 that is substantially horizontal at the recording position KP is positioned with high positional accuracy, and the belt surface of the conveyance belt 51 that is substantially vertical at the retreat position TP. 51a is positioned with high positional accuracy.

  In the present embodiment, it is configured to detect that the conveyance belt 51 is positioned at the recording position KP by controlling the rotation amount of the first motor M1. On the other hand, the detection sensor 56S (see FIG. 5) attached to the unit frame 56 detects that the transport belt 51 is positioned at the retracted position TP. Of course, a detection sensor that detects a state in which the conveyance belt 51 is positioned at the recording position KP may be provided, and the detection sensor provided may detect that the conveyance belt 51 is positioned at the recording position KP. .

  Further, as shown in FIGS. 5 and 7, in the present embodiment, the conveyance belt 51 can circulate not only in the state of moving to the recording position KP but also in the state of moving to the retracted position TP in this way. . That is, the unit frame 56 is provided with a transmission gear (not shown), and a second motor M2 as a driving source for rotating the driving roller 52 and rotating the conveyor belt 51 via the transmission gear is attached to the unit frame 56. ing. Therefore, by driving the second motor M2, the conveyance belt 51 can be rotated at the recording position KP and the retracted position TP.

  Therefore, the side plate portions 56R and 56L of the unit frame 56 are provided with a roller shaft of the driving roller 52 via a roller support portion 55J that rotatably supports the driving roller 52 provided on the base portion 55a of the belt frame 55. A bearing 54 (only the bearing 54 on the side plate portion 56R side is shown in FIG. 7) that is rotatably supported (axially supported) is provided.

  The transport unit 50 is provided with a rotation detection unit that detects the amount of rotation of the drive roller 52. In this embodiment, an optical rotary encoder using a disk 59 and a photocoupler 69 is employed as the rotation detection unit. Of these, the disk 59 is attached to the drive roller 52. On the other hand, the photocoupler 69 is attached to a lid portion 68 for covering the bearing 54 of the driving roller 52 provided in the side plate portion 56L on the left side (+ X direction) side of the unit frame 56. Therefore, the photocoupler 69 attached to the lid 68 functions as a detection sensor that detects the rotation of the disk 59 (rotation of the drive roller 52).

  By the way, as shown in FIG. 8, in this embodiment, a paper dust removing blade 58 for removing paper dust attached to the conveyor belt in the conveyor unit 50 is fixed to the belt frame 55. The paper dust removing blade 58 is provided with an extending portion extending along the width direction X so as to bridge between the base portions 55a of the belt frame body 55 located at both ends of the conveyance belt 51 in the width direction X. Yes. The extending portion contacts the belt surface 51a and scrapes the paper dust adhering to the belt surface 51a from the belt surface 51a or adsorbs the paper dust to remove the paper dust from the belt surface 51a. Has been. Further, the paper dust removing blade 58 is located on the + Z side above the wall member 97 of the cleaning unit 90 in the state where the conveyance belt 51 is located at the retracted position TP, that is, the rotation of the conveyance belt 51 when the conveyance belt 51 is cleaned. It is located downstream of the wall member 97 in the direction.

  As shown in FIG. 9, the printer 11 according to the present embodiment includes a cleaning unit 90 having a cleaning member 91 for wiping off and removing (cleaning) dirt adhered to the belt surface 51 a of the conveyance belt 51. (See FIGS. 1 and 2). In FIG. 9, components necessary for explaining the cleaning of the charging roller 81, the cleaning unit 90, and the conveyance belt 51 are illustrated, and other components such as the unit frame 56 and the belt moving unit 60 are omitted. It is shown in the figure.

  In the cleaning unit 90, a cleaning member 91 such as a woven cloth (web) is formed in a round shaft shape on a base frame 92 having a right side wall portion 92R and a left side wall portion 92L on both sides in the width direction X intersecting the transport direction Y. It is attached to the roll core in a rolled state.

  Specifically, in this embodiment, the cleaning unit 90 has a roll core 94a on the unwinding side of the cleaning member 91 and a roll core 94b on the windup side, and both end portions of each roll core 94a, 94b are on the right side wall portion. 92R and the left side wall portion 92L are respectively rotatably attached. The cleaning member 91 wound around the roll core 94a on the unwinding side has substantially the same length as the length in the width direction X of the transport belt 51 in the axial direction (width direction X) of the roll core 94a. It is wound around the roll core 94b on the take-up side. In the present embodiment, the roll core 94a on the unwinding side is positioned above the + Z side above the roll core 94b on the winding side.

  In FIG. 9, the cleaning member 91 is wound around two portions divided in the axial direction (width direction X) of the unwinding-side roll core 94a, and the axial direction (width) of the winding-side roll core 94b is also the same. It is shown in a state wound up in two parts separated in direction X). In order to make the mounting structure of the cleaning member 91 easy to understand, the unwinding state and the winding state of the cleaning member 91 are shown in one drawing. Incidentally, in each roll core 94a, 94b, the cleaning member 91 on the right side wall portion 92R side is shown in a substantially unwinding start state, and the cleaning member 91 on the left side wall portion 92L side is shown in a substantially unwinding end state.

  The cleaning unit 90 is provided with a power transmission mechanism 95 using a plurality of gears on the left side wall portion 92L of the base frame 92. Similarly, the driving of the third motor M3 as a drive source attached to the left side wall portion 92L is used for power transmission. It is transmitted to the roll core 94b on the winding side by the mechanism 95 to rotate the roll core 94b. By the rotation of the roll core 94b on the winding side, the cleaning member 91 wound around the roll core 94a on the winding side is unwound and moved while being guided by a plurality of rollers rotatably attached to the base frame 92. Then, it is wound around the roll core 94b on the winding side.

  On the right side wall portion 92R and the left side wall portion 92L of the base frame 92, extended wall portions 96 that extend downstream in the transport direction Y toward the transport belt 51 moved to the retracted position TP are provided. A wall member provided on the extended wall portion 96 so that a wall surface that is substantially parallel to the belt surface 51a of the transport belt 51 moved to the retracted position TP and extends in the width direction X faces the downstream side in the transport direction Y. 97 (see FIG. 22) is fixed. The cleaning member 91 moves along the wall surface of the wall member 97 when being wound around the roll core 94b on the winding side. In the plurality of rollers for guiding the movement of the cleaning member 91, the roller on the roll core 94 a side on the unwinding side from the wall member 97 is more than the roller on the roll core 94 b side on the winding side from the wall member 97. It is located above the upper + Z side.

  Further, in the present embodiment, the cleaning unit 90 is configured such that the roller 98 that is rotatably attached to the lower end portions on both sides in the width direction X of the base frame 92 rolls along a guide rail (not shown). Can be slid along. That is, in the cleaning unit 90, for example, the roller 98 is rotated by pushing or pulling the base frame 92 along the transport direction Y by a drive source (for example, an actuator) (not shown), so that the cleaning unit 90 reciprocates along the transport direction Y. (Slide movement). As the cleaning unit 90 moves, the cleaning member 91 slides along the transport direction Y. Therefore, in this embodiment, the roller 98 functions as a part of the cleaning member moving unit that moves the cleaning unit 90.

  The cleaning member moving unit moves the cleaning unit 90 to the upstream side in the transport direction Y, thereby moving the cleaning member 91 that moves along the wall surface of the wall member 97 away from the transport belt 51 (“cleaning member separation position”). (Also referred to as “CRP”) (see FIG. 22). Further, the cleaning member moving unit moves the cleaning unit 90 to the downstream side in the transport direction Y, thereby bringing the cleaning member 91 that moves along the wall surface of the wall member 97 into contact with the transport belt 51 (“cleaning member contact”). (Refer to FIG. 24). Accordingly, the cleaning unit 90 is moved between the cleaning member separation position CRP and the cleaning member contact position CSP by the cleaning member moving unit.

  As shown in FIG. 9, in this embodiment, the cleaning unit 90 includes the left wall portion 92 </ b> L of the base frame 92 and the extended wall portions of the right wall portion 92 </ b> R at the same time that the cleaning member 91 contacts the transport belt 51. 96 contacts the bearing members 82 that rotatably support the roller shafts 81a at both ends of the charging roller 81, respectively. By this contact, each extending wall portion 96 is configured to rotate the bearing member 82. Hereinafter, as an example of this configuration, the extending wall portion 96 of the left side wall portion 92L of the base frame 92 will be described. The extended wall portion 96 of the right side wall portion 92R of the base frame 92 has a similar configuration.

  As shown in FIG. 10, the bearing member 82 includes a round pin 83 that is rotatably supported by the casing 12 of the printer 11, and the roller of the charging roller 81 on the upper side + Z with respect to the round pin 83. A bearing portion 82a for receiving the shaft 81a is formed, and a substantially flat lever portion 82b is formed on the lower side -Z side. Then, as the cleaning unit 90 moves downstream in the transport direction Y, the extending wall 96 of the left wall 92L of the base frame 92 contacts the lever 82b of the bearing member 82 while moving the lever 82b in the transport direction. The bearing member 82 is configured to rotate around the round pin 83 by pushing to the Y downstream side.

  Further, the bearing member 82 is biased in a direction in which the charging roller 81 contacts the transport belt 51 by a biasing member such as a spring (not shown). Therefore, in a state where the extending wall portion 96 of the left side wall portion 92L of the base frame 92 is not in contact with the lever portion 82b of the bearing member 82, contact with the conveyance belt 51 so as to sandwich the conveyance belt 51 with the driving roller 52. Located in position.

  As a result, as shown by a two-dot chain line in FIG. 11, the charging roller 81 located at the contact position in contact with the conveyance belt 51 has the extended wall portion 96 in contact with the lever portion 82 b and the round pin 83 as the center. By rotating the bearing member 82, the bearing member 82 moves to a separated position away from the conveyor belt 51 as shown by a solid line in FIG.

  As described above, in this embodiment, the cleaning unit 90 moves the charging roller 81 to the transport belt in conjunction with the sliding movement between the cleaning member separation position CRP and the cleaning member contact position CSP along the transport direction Y. It moves between a contact position that contacts 51 and a separation position that is further away from the conveyor belt than the contact position. In this embodiment, the contact position of the charging roller 81 with respect to the transport belt 51 is also referred to as “roller contact position RSP”, and the separation position of the charging roller 81 is also referred to as “roller separation position RRP”.

  As shown in FIG. 11, the belt contact portion BS where the portion of the cleaning member 91 that exists along the wall surface of the wall member 97 contacts the conveyor belt 51 that has moved to the retracted position TP intersects the circumferential direction of the conveyor belt 51. It is formed along the width direction X. In the present embodiment, at least a part of the belt contact portion BS is supported by the belt frame body 55 from the side opposite to the contact side of the cleaning member 91. Therefore, the belt frame 55 functions as a belt support portion that supports the transport belt 51. Incidentally, in the present embodiment, the base portion 55a functions as a belt support portion and is configured to support almost the entire belt contact portion BS.

  By the way, also on the printing surface of the paper 14 on the opposite side of the contact surface that contacts the conveyance belt 51 of the paper 14, the portions charged with negative charges and the portions charged with positive charges are alternately formed. The charge on the printing surface of the paper 14 is removed by the static eliminator 100. Thus, by removing the charge on the printing surface side of the paper 14, the decrease in the charge on the contact surface side is suppressed. As a result, a decrease in electrostatic attraction force of the paper 14 by the transport belt 51 is suppressed.

The static eliminator 100 will be described with reference to FIGS. 3, 4, and 12 to 20. In FIGS. 12, 15, and 16, the support frame 116 is omitted.
As shown in FIGS. 3 and 4, the static eliminator 100 includes a static eliminator 110 provided upstream of the recording unit 18 in the transport direction Y and on the + Z side in the vertical direction Z.

  As shown in FIGS. 3 and 12, the static elimination unit 110 is provided so as to be able to contact the paper 14 conveyed by the conveyance unit 50, and moves on a moving path 121 (see FIG. 15) including a direction intersecting the conveyance direction Y. A neutralizing brush 111 that is movable, and a base member 112 that supports the neutralizing brush 111 are provided. The neutralizing brush 111 discharges the recording surface of the paper 14 by protruding from the outer surface (first surface 112a) of the base member 112 and contacting the paper 14 conveyed by the conveying unit 50. Further, the static elimination unit 110 further includes a first pulley 113 and a second pulley 114 around which the base material portion 112 is wound, and a drive unit 130 including a motor 131 that rotates the first pulley 113. . In this respect, the motor 131 corresponds to “a driving source for rotating the first pulley 113”. The neutralizing brush 111 is made of a conductive material. The base material part 112 is formed of a conductive material having flexibility. Specifically, the base material portion 112 is formed by sewing a conductive thread into a cloth. In addition, a conductive paint is applied to the second surface 112 b on the inner peripheral side of the base portion 112. The second pulley 114 is formed of a metal material and functions as a ground for the static eliminating unit 110.

  The base material portion 112 is an endless long member having a portion extending in a direction (width direction X) intersecting with the conveyance direction Y of the paper 14, and its thickness is constant. The base member 112 is provided with a neutralizing brush 111 on a first surface 112a which is a surface on the outer peripheral side, and a second surface 112b which is a surface on the inner peripheral side opposite to the first surface 112a is a first surface. The pulley 113 and the second pulley 114 are supported. The first pulley 113 and the second pulley 114 are located outside the both end portions in the width direction of the transport belt 51 in the width direction X. For this reason, both end portions in the width direction X of the base material portion 112 are positioned outside both end portions in the width direction of the transport belt 51.

  The static elimination unit 110 has a plurality of regions on the base material part 112 where the protruding heights of the static elimination brush 111 are different from each other. That is, in the circumferential direction of the base material part 112, the static elimination part 110 is 1st area | region A1 in which the protrusion height of the static elimination brush 111 from the 1st surface 112a is 1st predetermined height, and 1st And a second region A2 in which the protruding height of the static eliminating brush 111 from the surface 112a is a second predetermined height. In the present embodiment, in the second region A2, the second predetermined height is “0”. That is, the first region A1 in the base material portion 112 supports the static elimination brush 111 that can come into contact with the paper 14. In the circumferential direction (longitudinal direction) of the base material portion 112, the first area A1 is shorter than the area of the second area A2. The first area A <b> 1 is formed to be larger than the maximum size in the width direction X of the paper 14 that can be printed by the printer 11 and smaller than the size in the width direction X of the transport belt 51. For this reason, the static elimination brush 111 can contact the whole area | region of the width direction X of the paper 14 electrostatically adsorbed by the conveyance belt 51. FIG.

  In addition, as shown in FIG. 12, at least one hole 112 c is formed in the base material portion 112. That is, two holes 112c are formed in the base material portion 112 at a position where the circumferential phase difference of the base material portion 112 is approximately 180 degrees. The holes 112c are preferably formed in the second region A2 and in the vicinity of the outside of both ends of the first region A1. Furthermore, the neutralization unit 110 is provided with a position sensor Sc. The position sensor Sc is provided at a position where the hole 112c can be detected.

  As shown in FIGS. 3 and 12, the drive unit 130 is connected to the motor 131 and a driven pulley 133 that is disposed at a position adjacent to the first pulley 113 in the axial direction and can rotate integrally with the first pulley 113. A driving pulley 132 and a driven pulley 133 and a belt 134 wound around the driving pulley 132. The drive pulley 132 is disposed on the −Z side below the driven pulley 133 in the vertical direction Z. The driving pulley 132 and the motor 131 may be connected by a gear or a belt, and the output shaft of the motor 131 may be directly connected to the driving pulley 132.

  As shown in FIG. 12, the first pulley 113 is a transmission portion in which the driving force from the motor 131 is transmitted to the end portion in the axial direction (in this embodiment, the end portion on the upstream side in the transport direction Y). 113a. The driven pulley 133 is provided in the transmission portion 113a. The back of the first pulley 113 extends in the width direction X at the end opposite to the side where the transmission portion 113a is provided (in the present embodiment, the end on the downstream side in the transport direction Y). A supported portion 113b supported by one end 115a in the width direction X of the face plate 115 is provided. As shown in FIGS. 13 and 14, the back plate 115 is formed by overlapping two plate-like members. An end portion in the axial direction of the second pulley 114 (in this embodiment, the downstream side in the transport direction Y) is supported by the other end portion 115 b in the width direction X of the back plate 115.

  As shown in FIG. 14, the width of the static elimination brush in the transport direction Y is smaller than the width of the base material portion 112 in the transport direction. The neutralizing brush 111 is provided closer to the downstream side in the transport direction Y of the base material portion 112. For this reason, in the 1st field A1, the 1st surface 112a of base material part 112 is not covered with static elimination brush 111 in the end of the upstream of the conveyance direction Y of a base material part.

  As shown in FIG. 13, a support frame 116 that supports the base material portion 112 is disposed on the inner periphery of the base material portion 112. The support frame 116 has a rectangular shape when viewed in the transport direction Y, and is attached to the back plate 115 via a side wall (side wall 116b described later) along the vertical direction Z.

  As shown in FIG. 14, the support frame 116 has a U-shape in which the cross-sectional shape in the transport direction Y is open at the upstream side in the transport direction Y. The support frame 116 includes a plate-like top wall 116a that supports the second surface 112b on the upper side + Z side of the base material portion 112, and a lower side from the downstream end in the transport direction Y of the top wall 116a. And a plate-like bottom wall 116c extending from the lower-Z side end of the side wall 116b to the upstream side in the transport direction Y.

  The top surface of the top wall 116a is provided so as to be in contact with the second surface 112b at the second portion 112e in which the first surface 112a of the base material portion 112 faces away from the paper 14. The top surface of the top wall 116a supports the second portion 112e so that the second portion 112e of the base portion 112 does not loosen.

  The bottom surface of the bottom wall 116 c is provided so as to be in contact with the second surface 112 b in the first portion 112 d of the first surface 112 a of the base portion 112 that faces the paper 14 and the transport belt 51. For this reason, the bottom wall 116c supports the second surface 112b of the first portion 112d so that the first portion 112d of the base material portion 112 does not float. In this respect, in the present embodiment, the bottom wall 116c corresponds to the “first guide member”.

  At the end of the bottom wall 116c on the upstream side in the transport direction Y, an extension portion 116d having a U-shape in which a cross-sectional shape orthogonal to the width direction X opens toward the downstream side in the transport direction Y is provided. . The extension portion 116d includes a portion that is disposed upstream of the first portion 112d in the base material portion 112 in the transport direction Y and is adjacent to the base material portion 112. In this respect, in the present embodiment, the extension portion 116d corresponds to a “third guide member”. The U-shaped inner surface of the extension part 116d covers the upstream end of the base part 112 in the transport direction Y. In other words, the upstream end of the base material part 112 in the transport direction Y is hooked on the extension part 116d. In the first region A <b> 1 of the base material part 112, the neutralizing brush 111 is not provided at the upstream end in the transport direction Y. For this reason, the inner surface of the extension part 116d can be opposed to the first surface 112a of the base part 112 in both the first region A1 and the second region A2.

  Further, the extension part 116 d includes a guide part 116 e that is inclined so as to approach the conveyance belt 51, that is, the sheet 14 as the surface facing the sheet 14 moves from the upstream side to the downstream side in the conveyance direction Y. The guide portion 116e is formed as the bottom surface of the extension portion 116d (the surface on the lower side in the vertical direction Z—the Z side).

  The lower end portion 115c of the back plate 115 is positioned on the −Z side below the base portion 112 in the first portion 112d. For this reason, the lower end portion 115 c of the back plate 115 is disposed downstream of the base material portion 112 in the transport direction Y and is adjacent to the base material portion 112. In this respect, in the present embodiment, the back plate 115 corresponds to a “second guide member”. The lower end portion 115c of the back plate 115 and the base material portion 112 may be in contact with each other. When a downstream force is applied to the base material portion 112, the lower end portion 115c of the back plate 115 and the base material portion 112 are contacted. May be adjacent to each other through a gap. The lower end 115 c of the back plate 115 partitions a space on the recording unit 18 (see FIG. 1) side, which is downstream in the transport direction Y, and a space on the upstream side in the transport direction Y. For this reason, the ink ejected onto the paper 14 in the recording unit 18 is prevented from flowing upstream of the back plate 115 in the transport direction Y. Further, the back plate 115 is enhanced in rigidity because the lower end portion 115c is bent toward the downstream side in the transport direction Y and the upper end portion 115d is bent toward the upstream side in the transport direction Y. Further, since the upper end 115d is bent toward the upstream side in the transport direction Y, the upper end 115d covers the upper + Z side in the vertical direction Z of the static elimination brush 111 located at the second portion 112e, so that dust or the like Can be prevented from adhering to the static elimination brush 111.

With reference to FIG.15 and FIG.16, the movement of the base material part 112 is demonstrated.
In the static eliminating unit 110, the first pulley 113 rotates in the first direction or the second direction by the driving force transmitted from the driving unit 130. As the first pulley 113 rotates, the base material portion 112 rotates and the base material portion 112 and the static elimination brush 111 move on the movement path 121. The moving path 121 includes a linear path 122 between the first pulley 113 and the second pulley 114 and a curved path 123 on the outer periphery of the first pulley 113 and the second pulley 114. That is, a part of the curved path 123 is configured as a part around which the base portion 112 is wound around the first pulley 113.

  As shown in FIG. 15, when at least a part of the first region A1 is in the first part 112d, that is, when at least a part of the static elimination brush 111 is in the first part 112d, the static elimination brush 111 is conveyed. Contact with the belt 51 is possible. Therefore, the sheet 14 (see FIG. 14) that is supported and conveyed on the conveyance belt 51 and the static elimination brush 111 can contact each other.

  As shown in FIG. 16, when the entire first region A1 is not in the first portion 112d, that is, when the entire neutralizing brush 111 is not in the first portion 112d, the neutralizing brush 111 is separated from the conveyance belt 51. To do. Therefore, the sheet 14 (see FIG. 14) that is supported and conveyed on the conveyance belt 51 and the static elimination brush 111 can contact each other.

  As described above, the neutralization unit 110 is moved in the first state in which the sheet 14 conveyed by the conveyance belt 51 illustrated in FIG. 15 and the neutralization brush 111 are brought close to each other by the movement of the base 112, and the conveyance belt illustrated in FIG. The second state in which the sheet 14 conveyed by 51 and the static elimination brush 111 are separated is switched. When the neutralization unit 110 is in the second state, the conveyance belt 51 and the neutralization brush 111 are separated from the first state. In this embodiment, since the protrusion height of the static elimination brush 111 in the second area A2 is “0”, that is, the static elimination brush 111 is not provided in the second area A2, the static elimination unit 110 is provided. The neutralizing brush 111 is not provided in the first portion 112d facing the paper 14 when in the second state. In the following description, the turning position of the base material portion 112 when in the first state is referred to as a first position P1, and the turning position of the base material portion 112 when in the second state is referred to as a second position P2. .

  By the way, when the static elimination brush 111 is brought into contact with the paper 14, paper dust and foreign matters such as ink adhering to the paper 14 adhere to the static elimination brush 111. In this case, as the amount of foreign matter attached to the static elimination brush 111 increases, the charge removal efficiency from the paper 14 by the static elimination unit 110 decreases.

  For this reason, as shown in FIGS. 17 and 18, the static eliminator 100 further includes a foreign substance removing device 140 in the vicinity of the curved path 123. The foreign matter removing device 140 includes a scraping member 141 that can come into contact with the static eliminating brush 111, and a duct 142 that sucks foreign matter 14P (see FIG. 19) such as paper dust scraped out by the scraping member 141. . The duct 142 includes a hollow introduction portion 143 having a duct port 144 that can cover the curved path 123, and a hollow main body portion 145 that communicates with the introduction portion 143 and is located on the + Z side above the introduction portion 143 in the vertical direction Z. And a fan 146 attached to the main body 145.

  A scraping member 141 is disposed inside the duct port 144 of the duct 142. The scraping member 141 can contact the static elimination brush 111 located in the curved path 123. The scraping member 141 has a flat shape extending in the width direction X, and is formed of a flexible material such as a PET (polyethylene terephthalate) film. The scraping member 141 has a base portion 141 a supported by the introduction portion 143, and a tip end 141 b extending toward the first pulley 113 so as to be in contact with the static elimination brush 111. The size of the scraping member 141 in the transport direction Y is smaller than the size of the duct port 144 in the transport direction Y. For this reason, there is a gap between the scraping member 141 and the upstream portion of the duct port 144 in the transport direction Y, and between the scraping member 141 and the downstream portion of the duct port 144 in the transport direction Y. Is formed.

  The duct port 144 covers the entire static elimination brush 111 located in the curved path 123. As shown in FIG. 18, the duct port 144 includes a first cutout portion 144 a in which the periphery of the transmission portion 113 a (see FIG. 17) of the first pulley 113 is cut out, and a supported portion of the first pulley 113. 113b (see FIG. 17) and a second notch 144b in which the periphery is cut out. At least a part of the back plate 115 that supports the first pulley 113 is disposed at a position adjacent to the second cutout portion 144b. In this respect, in this embodiment, the back plate 115 corresponds to “a frame that supports the first pulley”.

  As shown in FIG. 19, the tip end of the top portion 144 c of the duct port 144 is the same position as the center line CL passing through the center axis of the first pulley 113 in the width direction X, or the second pulley 114 than the center line CL. Located on the side. The front end of the bottom portion 144d of the duct port 144 is located at the same position as the center line CL of the first pulley 113 in the width direction X or on the second pulley 114 side of the center line CL.

  As shown in FIG. 20, the main body 145 is provided with a filter 147 that can be detached from the main body 145. The filter 147 partitions the downstream portion in the suction direction on the fan 146 side and the upstream portion in the suction direction on the introduction portion 143 side inside the main body portion 145. The filter 147 is provided with a handle 147 a that can be gripped by the user from the outside of the main body 145. The user can remove the filter 147 from the main body 145 using the handle 147a and take it out of the printer 11 (see FIG. 1). That is, the duct 142 includes a filter 147 that is detachable from the printer 11 (see FIG. 1) on the downstream side of the duct port 144 in the suction direction.

Next, the operation of this embodiment will be described.
In the present embodiment, as the operation, when it is estimated that the conveyor belt 51 is dirty, an operation process for cleaning the conveyor belt 51 is performed. These operation processes are executed by the control unit 99 shown in FIG. The control unit 99 includes a central processing unit (CPU), a storage device (memory), various drive circuits, and the like, and controls printing processing such as processing for ejecting ink in the recording unit 18. The control unit 99 executes each process by controlling the driving of each driving source in a predetermined order.

First, with reference to FIG. 21, the cleaning operation process of the conveyance belt 51 executed by the control unit 99 will be described.
As shown in FIG. 21, when this operation process is started, in step S1, the printer 11 is put into a print standby state in which ink can be ejected from the recording unit 18, and the following steps are performed. In S2, a determination process is performed to determine whether or not the first sensor Sa is “ON”, that is, whether or not the paper 14 is detected. Then, the determination process of step S2 is repeated until the first sensor Sa is turned “ON” (step S2: YES). When the first sensor Sa is turned “ON”, in the next step S3, for example, the printer 11 A process for starting printing based on the print data input to the printer, that is, a process for starting ink ejection in the recording unit 18 is performed.

  Next, in step S4, whether or not the second sensor Sb is “ON” within the set time, that is, the elapsed time from when the first sensor Sa detects the paper 14 until the second sensor Sb detects the paper 14 Is determined whether or not the current time is within the set time. In the present embodiment, the arrival time from the first sensor Sa to the second sensor Sb when the paper 14 is transported along the transport path 13 without delay is set in advance, and the control unit 99 uses the set time. Then, the determination process of step S4 is performed.

  When the second sensor Sb is “ON” within the set time and the paper 14 is detected (step S4: YES), the paper 14 is being transported through the transport path 13 without stagnation. In step S5, the current print continuation process is performed, and the process returns to the print standby state (step S1) to prepare for the next print.

  On the other hand, if the second sensor Sb does not “ON” within the set time, that is, if the second sensor Sb does not detect the paper 14 (step S4: NO), the paper 14 is transported by the transport belt 51 in the transport path 13. It is estimated that the jammed state is stagnant, and the process proceeds from step S11 to step S22. As described above, when the paper 14 is jammed (paper jam), the ink ejected from the recording unit 18 may not adhere to the paper 14 but adhere to the transport belt 51. That is, when the paper jam occurs and the conveyance belt 51 becomes dirty, the conveyance belt 51 is detected by detecting a jammed state where the conveyance by the conveyance belt 51 is delayed in the conveyance path 13 by the processing in step S4. It can be presumed that the ink was soiled by the adhesion of ink. Therefore, the control unit 99 functions as a stain estimation unit that estimates the contamination of the transport belt 51 by the determination process in step S4 using the first sensor Sa and the second sensor Sb.

  In step S11 performed subsequent to step S4, the rotation of the conveyor belt 51 is stopped. In the next step S12, a process of moving the conveyor belt 51 from the recording position KP to the retracted position TP is performed. That is, the control unit 99 controls the belt moving unit 60 to rotate the conveyance belt 51 around the driving roller 52 in a direction away from the charge removal unit 110.

  Moreover, in step S13 performed following step S12, a process of moving the position of the static eliminating unit 110 from the first position P1 to the second position P2 is performed. That is, when moving the static eliminating unit 110 from the first position P1 to the second position P2, the control unit 99 causes the belt moving unit 60 to rotate the transport belt 51 in a direction away from the static eliminating unit 110, and then The first position P1 is moved to the second position P2. At this time, the controller 99 circulates the base member 112 so that the static elimination brush 111 passes through the curved path 123 as shown by an arrow B1 in FIG. 15, and the static elimination brush 111 is provided as shown in FIG. The motor 131 is driven until the entire first area A1 moves to the second portion 112e. Note that whether or not the entire first region A1 where the static elimination brush 111 is provided by the control unit 99 has moved to the second portion 112e is determined by the position sensor Sc in the moving direction of the base member 112. This is performed based on the detection of the hole 112c (see FIG. 12) on the downstream side of the region A1. Then, in the next step S14, processing for notifying the occurrence of paper jam is performed.

  In the present embodiment, the housing 12 of the printer 11 is provided with a display unit (not shown), and a notification word such as “paper jam occurrence” and a notification color are displayed on the display unit. Alternatively, the housing 12 of the printer 11 is provided with a sounding unit (not shown), and the sounding unit is used to sound a word such as “paper jam occurrence” or a notification sound.

  Next, in step S15, a determination process is performed as to whether or not the paper jam release process has been completed. In this embodiment, after the notification process in step S14, as shown in step S23 in FIG. 11, a paper jam release process by the user is performed. For example, the user opens a cover that covers an opening provided in a part of the housing 12, takes out the jammed paper 14 through the exposed opening, and closes the cover again to cover the opening. Paper jam release processing may be performed. In such a case, the control unit 99 determines that the paper jam release processing has been completed by detecting a state in which the cover covering the opening is closed by a sensor or the like. Alternatively, the control unit 99 detects that the paper jam clearing process is completed by inputting a signal indicating that the paper jam clearing is completed using an input unit (not shown) and detecting the input signal. judge. If it is determined that the paper jam clearing process has been completed (step S15: YES), the paper 14 can be transported along the transport path 13, and the process proceeds to step S16.

  In step S16, the cap moving mechanism 70 shown in FIG. 1 is controlled, and the cap 71 is moved from a state where the recording unit 18 apart from the recording unit 18 is not covered to a state where the recording unit 18 shown in FIG.

  Next, in step S17, a process of moving (sliding) the cleaning unit 90 to a contact position (cleaning member contact position) where the cleaning member 91 comes into contact with the transport belt 51 is performed. In subsequent step S18, the transport is performed. Circulation of the belt 51 and winding of the cleaning member 91 are performed. As a result of the processing of step S17 and step S18, the cleaning member 91 of the cleaning unit 90 causes the belt belt portion BS of the conveyor belt 51 that exists along the wall surface of the wall member 97 to circulate. Move in the opposite direction.

  As described above, the portion of the cleaning member 91 that forms the belt contact portion BS moves in the direction opposite to the circumferential direction of the transport belt 51, thereby improving the cleaning efficiency. For example, the ink adhering to the conveyance belt 51 by the cleaning member 91 can be easily wiped off. Alternatively, the cleaning member 91 increases the probability that ink is not left and is wiped off. Of course, it is preferable that the amount of movement of the cleaning member 91 along the wall surface of the wall member 97 that forms the belt contact portion BS in the transport belt 51 is adjusted according to the degree of contamination of the transport belt 51. For example, when there is little dirt on the conveyor belt 51, it is preferable to reduce the rotation speed of the roll core 94b on the winding side so that the winding is performed with a small amount of movement of the cleaning member 91 per unit time. .

  Here, with reference to FIG. 22 to FIG. 24, the processes from step S11 to step S19 will be supplementarily described. 22 to 24, in the cleaning unit 90, the unwinding state and the winding state of the cleaning member 91 are shown in one drawing.

  First, as shown in FIG. 22, when the printer 11 is in the process before proceeding to step S11, that is, in the print standby state or the print continuation state, the transport belt 51 is positioned at the recording position KP, and the charging roller 81 is transported. It is located at a roller contact position where it contacts the belt 51. Of course, the cleaning unit 90 is located at the cleaning member separation position CRP which is separated from the lever portion 82b of the bearing member 82 to the downstream side in the transport direction Y.

  Next, as shown in FIG. 23, the conveyance belt 51 rotates (swings) about the drive roller 52 and moves from the recording position KP to the retreat position TP by the process of step S13. When the transport belt 51 is moved to the retracted position TP, the charging roller 81 is maintained in contact with the transport belt 51. In addition, since the rotation of the conveyance belt 51 is stopped by the processing in step S <b> 11, the belt surface 51 a that is contaminated by ink and is prevented from moving to a position where it contacts the charging roller 81.

  Next, as shown in FIG. 24, the cleaning unit 90 is slid by the rotation of the roller 98 from the cleaning member separation position CRP to the cleaning member contact position CSP by the process of step S17. By the movement of the cleaning unit 90 to the cleaning member contact position, the charging roller 81 moves from the roller contact position RSP with the transport belt 51 to the roller separation position RRP. In step S18, as indicated by an arrow in the figure, the cleaning member 91 that moves in the direction opposite to the circumferential direction of the conveyance belt 51 causes the ink attached to the belt surface 51a of the conveyance belt 51 to be removed from the cleaning member 91. Is wiped off by. The portion of the cleaning member 91 from which the ink has been wiped is guided by a roller on the side of the roll core 94b closer to the winding side than the wall member 97, and is wound on the roll core 94b on the winding side.

  Therefore, in the present embodiment, in the cleaning unit 90, since the roll core 94a on the unwinding side is above the roll core 94b on the winding side, even if the ink wiped off by the cleaning member 91 is dripped, It is possible to prevent the cleaning member 91 on the delivery-side roll core 94a side from being soiled. Further, in the roller that guides the movement of the cleaning member 91, even if the ink drips from the roller on the roll core 94 b side on the winding side from the wall member 97, it is higher than the roller on the roll core 94 b side on the winding side. It is possible to prevent the cleaning member 91 guided by the roller on the roll core 94a side on the unwinding side located at from being soiled.

  In this embodiment, the charging roller 81 is positioned downstream of the cleaning member 91 in the circumferential direction of the conveyance belt 51, and the ink attached to the belt surface 51 a of the conveyance belt 51 is before reaching the charging roller 81. The cleaning member 91 wipes away. Of course, even when the ink remaining without being wiped passes through the cleaning member 91 in a state where it adheres to the belt surface 51a, the charging roller 81 moves to the roller separation position RRP away from the belt surface 51a of the transport belt 51. Therefore, the ink adhering to the belt surface 51 a is suppressed from moving to the charging roller 81.

  Although not shown in FIGS. 22 to 24, the paper dust removing blade 58 is also provided on the downstream side of the wall member 97 in the circumferential direction of the transport belt 51 when the transport belt 51 is located at the retracted position TP. positioned. For this reason, the ink adhering to the belt surface 51a of the conveying belt 51 is wiped off by the cleaning member 91 before reaching the paper dust removing blade 58, and the paper dust removing blade 58 is prevented from being stained with ink.

  Returning to FIG. 21, in the next step S19, a process of sliding the cleaning unit 90 from the cleaning member contact position to the separation position (cleaning member separation position CRP) away from the conveying belt 51 is performed. As the cleaning unit 90 moves to the cleaning member separation position CRP, the charging roller 81 moves from the separation position (roller separation position RRP) to the transport belt 51 to the contact position (roller contact position RSP). In the present embodiment, the time estimated that the wiping of the ink attached to the conveyance belt 51 by the cleaning member 91 is completed in the process of step S18 is set in advance, and after the time has elapsed, the process of step S19 is performed. Done.

  In step S20, the cap moving mechanism 70 shown in FIG. 2 is controlled, and the cap 71 is moved from the state covering the recording unit 18 shown in FIG. 2 to the state not covering the recording unit 18 away from the recording unit 18 shown in FIG. Let

  And in step S21 performed following step S20, the process which moves the position of the static elimination part 110 from the 2nd position P2 to the 1st position P1 is performed. That is, when moving the static elimination unit 110 from the second position P2 to the first position P1, the control unit 99 causes the belt moving unit 60 to rotate the transport belt 51 in a direction approaching the static elimination unit 110, and then The second position P2 is moved to the first position P1. At this time, as shown by an arrow B2 in FIG. 16, the control unit 99 circulates the base member 112 so that the static elimination brush 111 passes through the curved path 123, and the static elimination brush 111 is provided as shown in FIG. The motor 131 is driven until the entire first area A1 moves to the first portion 112d. The moving direction of the base material part 112 in step S13 is different from the moving direction of the base material part 112 in step S22. That is, the static elimination brush 111 reciprocates on the movement path 121. It should be noted that the position sensor Sc determines whether or not the entire first region A1 where the static elimination brush 111 is provided has moved to the first portion 112d by the control unit 99 (see step S13 and step S13). Is performed based on the detection of the hole 112c (see FIG. 12) on the downstream side of the first region A1 in the reverse direction.

  In step S22, the conveyor belt 51 is moved from the retracted position TP to the recording position KP. That is, the control unit 99 controls the belt moving unit 60 to rotate the transport belt 51 around the driving roller 52 in a direction approaching the charge removal unit 110.

  When the process up to step S22 is performed, the process returns to the print standby state (step S1) to prepare for the process of transporting and printing the paper 14. In the present embodiment, the operation process for cleaning the transport belt 51 is performed in this way.

With reference to FIG.25 and FIG.26, the effect | action of the support structure of the base material part 112 is demonstrated.
The static elimination brush 111 and the base material part 112 receive the force to the conveyance direction Y shown by the arrow AX of FIG. Here, since the static elimination brush 111 and the base material part 112 contact the lower end part 115c of the backplate 115 in the downstream of the conveyance direction Y, the static elimination brush 111 and the base material part 112 are from the lower end part 115c of the backplate 115. A force in the direction opposite to the conveyance direction Y indicated by the arrow AY in FIG. 26 is received. At this time, since the bottom wall 116c of the support frame 116 is disposed above the + Z side of the base material part 112, the base material part 112 and the lower end part 115c of the back plate 115 are provided on the base material part 112 and the static elimination brush 111. A moment on the lower side -Z side indicated by an arrow AZ in FIG. Here, since the upstream end in the transport direction Y on the base material portion 112 side is hooked on the extension portion 116d of the support frame 116, the base material portion 112 moves from the extension portion 116d of the support frame 116 to the arrow AZ. A force indicated by an arrow AW that cancels the directional moment is received. For this reason, the movement to the arrow AZ side of the base material part 112 is suppressed.

  Further, as shown in FIG. 26, the extension portion 116 d of the support frame 116 corresponds to the range of the first portion 112 d of the base portion 112 in the width direction X. The extension part 116 d of the support frame 116 is arranged so as to correspond to the lower end part 115 c of the back plate 115 in the transport direction Y. For this reason, the movement to the arrow AZ side of the base material part 112 in the whole 1st part 112d of the base material part 112 is suppressed.

According to the above embodiment, the following effects can be obtained.
(1) In the printer 11, the duct port 144 covers the periphery of the static elimination brush 111 at the position of the curved path 123 where the scraping member 141 contacts the static elimination brush 111. For this reason, it is suppressed that the foreign material 14P removed by the scraping member 141 is sucked by the duct 142 and scattered around. For this reason, it is possible to suppress a decrease in printing (recording) quality due to the adhesion of the foreign matter 14P removed from the static elimination brush 111.

  (2) The scraping member 141 is in contact with the static elimination brush 111 located on the curved path 123. In the curved path 123, the space | interval of the front-end | tip of the static elimination brush 111 becomes large. For this reason, since the foreign material 14P is easily scraped off by the scraping member 141, the efficiency of removing the foreign material 14P can be improved as compared with the configuration in which the scraping member 141 is brought into contact with the static elimination brush 111 on the straight path 122.

  (3) Since the base material part 112 that supports the static elimination brush 111 is endless, the movement path 121 including the curved path 123 can be easily configured by circling the base material part 112. For this reason, for example, compared with the case where the static elimination brush 111 is supported by the base material part 112 which linearly reciprocates along the width direction X in which the movement mode intersects the conveyance direction Y, the width direction X of the static elimination part 110 is compared. Can be reduced in size.

  (4) As shown in FIG. 27, drive system devices such as the static eliminator 100 of the printer 11 are arranged in an arrangement space S formed on the −X direction side in the width direction X inside the housing 12. Has been. For this reason, the maintenance of the drive system can be easily performed by opening the −X direction side of the width direction X of the housing 12. On the other hand, for example, the driven pulley 133 is disposed in the vicinity of the curved path 123 covered by the duct port 144 of the static eliminator 100. Therefore, the first notch portion 144a and the second notch portion 144b are formed in the duct port 144. .

  In the static eliminating portion 110, an end portion 115a of the back plate 115 that supports the first pulley 113 is disposed at a position adjacent to the second cutout portion 144b. For this reason, since the edge part 115a of the backplate 115 suppresses that the foreign material 14P attracted | sucked by the duct port 144 flows out of the duct port 144, the foreign material 14P can be removed efficiently.

  (5) Since the static elimination brush 111 reciprocates in the movement path 121, the scraping member 141 comes into contact with the static elimination brush 111 from both one side and the other side of the movement path 121. For this reason, it is difficult for the foreign matter 14P to remain on the static elimination brush 111, and the removal efficiency of the foreign matter 14P is improved.

  (6) The duct 142 includes a filter 147 that can be attached to and detached from the printer 11 on the downstream side in the suction direction from the duct port 144. For this reason, by removing the filter 147 from the printer 11, the filter 147 can be cleaned or replaced, so that the foreign matter 14 </ b> P accumulated on the filter 147 can be removed. For this reason, a reduction in the suction force of the duct 142 is suppressed.

  (7) The neutralization unit 110 moves the base material unit 112 so that the conveyance belt 51 and the neutralization brush 111 are close to each other, and the conveyance belt 51 and the neutralization brush 111 are more than in the first state. A second state of separation can be taken. For this reason, for example, by moving the first pulley 113 and the second pulley 114 downward to the −Z side, the conveyance belt 51 and the neutralization brush 111 are brought into proximity with each other, and the conveyance belt 51 and the neutralization brush 111 are made. The apparatus can be simplified compared to the configuration for switching the state. Further, when the first pulley 113 and the second pulley 114 are moved downward to the −Z side, it is difficult to align the lower end of the static elimination brush 111 on the −Z side, and there is a possibility that the static elimination efficiency is lowered. Since the neutralization unit 110 can omit such alignment, a decrease in the neutralization efficiency is suppressed.

  (8) The static elimination part 110 has several area | region A1, A2 from which the protrusion height of the static elimination brush 111 differs on the base material part 112, respectively. For this reason, it is possible to switch between the first state and the second state by moving the base material portion 112 so that the regions A1 and A2 having different protrusion heights of the static elimination brush 111 are opposed to the conveyance belt 51. In addition, the structure of the static elimination unit 110 can be simplified.

  (9) Since the position sensor Sc detects the hole 112c formed in the base material part 112, the position of the base material part 112 can be grasped, so the first state and the second state are appropriately formed. can do.

  (10) Since the neutralizing brush 111 is not provided in the portion of the base material portion 112 that faces the conveying belt 51, the configuration of the static eliminating portion 110 is compared with the case where the neutralizing brush 111 is provided on the entire base material portion 112. Can be simplified.

  (11) When switching the neutralization unit 110 from the first state to the second state, the control unit 99 causes the belt moving unit 60 to rotate the conveyance belt 51 in a direction away from the neutralization unit 110, and then the neutralization unit 110. Is switched from the first state to the second state. For this reason, when the static elimination part 110 is switched from the 1st state to the 2nd state, since the conveyance belt 51 has previously left | separated from the static elimination brush 111, the static elimination brush 111 does not contact the conveyance belt 51. FIG. For this reason, it can suppress that the static elimination part 110 and the conveyance belt 51 are worn by contact.

(12) When the transport belt 51 transports the paper 14 from the upstream side in the transport direction Y to the downstream side, a force is applied to the neutralizing brush 111 from the upstream side in the transport direction Y to the downstream side.
In the printer 11, when the force from the conveyance belt 51 is applied to the static elimination brush 111, the base portion 112 moves in a direction away from the paper 14 by the bottom wall 116 c of the support frame 116 and the lower end portion 115 c of the back plate 115. Is suppressed. For this reason, it can suppress that the static elimination performance with respect to the paper 14 falls.

  (13) A part of the lower end portion 115 c of the back plate 115 is disposed at the central portion in the width direction X of the conveyor belt 51. For this reason, the movement of the base material portion 112 can be suppressed in the central portion of the base material portion 112 that is most likely to move away from the paper 14.

  (14) The extension part 116d of the support frame 116 is arranged at least partly upstream of the base part 112 in the transport direction Y in the first portion 112d of the base part 112, and upstream of the base part 112. The side end can be engaged. For this reason, the extension portion 116d suppresses the upstream end portion of the base material portion 112 from moving away from the paper 14.

  (15) The extension part 116 d of the support frame 116 is disposed so as to correspond to the lower end part 115 c of the back plate 115 in the transport direction Y. For this reason, due to the force received from the conveying belt 51 by the base member 112 and the static elimination brush 111, the moment generated around the portion receiving the force from the lower end 115c of the back plate 115 is caused by the force received from the lower end 115c of the back plate 115. Can be countered. For this reason, the movement of the base material part 112 can be suppressed.

  (16) Since the guide portion 116e is inclined so that the surface facing the paper 14 approaches the paper 14 from the upstream side to the downstream side in the transport direction Y, this surface functions as an invitation for the paper 14. Further, it is possible to suppress the end portion of the conveyed paper 14 from being caught by the extension portion 116d. Further, when the upstream end of the static elimination brush 111 in the conveyance direction Y approaches the conveyance belt 51, the base portion 112 is elastically deformed, so that the end of the paper 14 is easily caught by the static elimination brush 111. Even in such a case, the end portion of the paper 14 can easily enter the static elimination brush 111 by the guide portion 116e.

In addition, you may change the said embodiment into another embodiment as follows.
In the above embodiment, as shown in FIG. 28, the edge of the duct port 144 can be bent inward of the duct port 144 on the bottom 144d side of the first notch 144a. In this case, the lip portion bent inward in the first notch portion 144a prevents foreign matter sucked into the duct port 144 from flowing out of the duct port 144. Can be removed. In addition, a portion bent inward can also be formed in the second cutout portion 144b.

  In the above embodiment, as shown in FIG. 28, a wall portion 148 extending inward from the duct port 144 to the duct port 144 may be provided on the bottom portion 144 d of the duct port 144. In this case, since the wall part 148 suppresses the foreign matter sucked into the duct port 144 from flowing out of the duct port 144, the foreign matter can be more efficiently removed. In addition, the wall part 148 can also be provided in the 1st notch part 144a, the 2nd notch part 144b, and the top part 144c. In any case, the wall portion 148 can suppress the foreign matter sucked into the duct port 144 from flowing out of the duct port 144.

  In the above embodiment, as shown in FIG. 29, a tray 149 that can be attached to and detached from the printer 11 can be provided on the downstream side of the duct port 144 in the suction direction. The tray 149 can be extracted from the main body 145 by pulling the grip 149 a located outside the main body 145. The tray 149 is disposed at the bottom of the main body 145 and can collect foreign matter that has collided with the filter 147 and dropped without being collected by the filter 147. In this case, since the tray 149 can be cleaned by removing the tray 149 from the printer 11, foreign substances accumulated on the tray 149 can be removed. For this reason, a reduction in the suction force of the duct 142 is suppressed.

  In the above embodiment, as shown in FIG. 30, the duct port 144 may cover a part (for example, about 80%) of the static elimination brush 111 positioned in the curved path 123. Specifically, the tip of the top portion 144c of the duct port 144 is positioned on the side farther from the second pulley 114 than the center line CL passing through the central axis of the first pulley 113 in the width direction X. In addition, the tip of the bottom portion 144 d of the duct port 144 is positioned farther from the second pulley 114 than the center line CL of the first pulley 113 in the width direction X.

  -In the said embodiment, as shown in FIG.31 and FIG.32, the base material part 112 can also be formed in endless form. The base material part 112 of FIG. 31 is configured to be movable on the rail 151. The rail 151 includes a curved portion 151 a that is curved upward + Z outside the width direction X of the transport belt 51. This bending portion 151 a is configured as a bending path 123. The base material part 112 of FIG. 32 is configured to be movable on the rail 152. The rail 152 includes a curved portion 152a that curves to the downward −Z side outside the width direction X of the transport belt 51. This bending portion 152 a is configured as a bending path 123.

  In the above embodiment, the foreign substance removing device 140 can be provided in the vicinity of the second pulley 114. Further, the two foreign substance removing devices 140 may be provided, and may be provided in the vicinity of the first pulley 113 and the second pulley 114, respectively.

  In the above embodiment, the filter 147 can be omitted. In this case, for example, the main body 145 may be configured to be detachable from the printer 11 so that foreign matter accumulated in the main body 145 may be removed.

  In the above embodiment, a portion adjacent to the second cutout portion 144b of the back plate 115 can be omitted. In this case, the first pulley 113 can be supported by the introduction portion 143 of the duct 142, for example.

  In the above embodiment, the base material portion 112 can be rotated only in one direction. Specifically, in step S13 and step S22 of FIG. 21, the base material part 112 is moved in the same direction. In this case, in one of step S13 and step S22, the foreign matter is removed from the static elimination brush 111 by the foreign matter removing device 140.

  In the second embodiment, the neutralization brush 111 having a protrusion height lower than that of the first region A1 may be provided on the base material portion 112 of the above embodiment. In this case, the protruding height of the neutralizing brush 111 in the second region A2 is a height at which the neutralizing brush 111 and the transport belt 51 do not contact when the second region A2 is in the second portion 112e.

  In the above-described embodiment, the base portion 112 may be provided with a third region having different protrusion heights of the first region A1 and the static elimination brush 111. In this case, for example, the protruding height of the neutralizing brush 111 in the third region is made smaller than the protruding height of the neutralizing brush 111 in the first region A1. When printing on the relatively thin paper 14, the first area A1 is moved to the first portion 112d. When printing on the relatively thick paper 14, the third area is moved to the first portion 112d. Move.

-The static elimination brush 111 can also be provided in the perimeter of the base-material part 112 of the said embodiment.
-In the said modification, the protrusion height of the static elimination brush 111 can also be made constant. In this case, the entire circumference of the base material portion 112 becomes the first region A1, and the second region A2 does not exist.

  In the above embodiment, the hole 112c of the base material portion 112 can be omitted. In this case, a mark (for example, a scale) that can be detected by the position sensor Sc can be provided on the base material portion 112. Alternatively, the position of the charge removal unit 110 may be controlled by the control unit 99 determining a control amount of the motor 131 in advance.

  In the above embodiment, the static elimination brush 111 can be provided closer to the upstream side in the transport direction Y as shown in FIG. In this case, the lower end portion 115 c of the back plate 115 may be bent toward the upstream side in the transport direction Y and engaged with the base material portion 112. In this case, the extension part 116 d of the support frame 116 extends downward to the −Z side at a position adjacent to the upstream end part of the base material part 112.

  In the above embodiment, the static elimination brush 111 may be provided near the center in the transport direction Y as shown in FIG. In this case, similarly to FIG. 34, the lower end 115c of the back plate 115 may be bent toward the upstream side in the transport direction Y and engaged with the base member 112.

  In the above embodiment, the lower end 115c of the back plate 115 can be provided discontinuously in the width direction X as shown in FIG. In FIG. 35, for example, five lower end portions 115 c of the back plate 115 are provided in the width direction X. Further, the extension 116 d of the support frame 116 can be provided discontinuously in the width direction X. In FIG. 35, for example, five extension portions 116 d of the support frame 116 are provided in the width direction X. When both the lower end 115c of the back plate 115 and the extension 116d of the support frame 116 are discontinuously provided, the lower end 115c of the back plate 115 and the extension 116d of the support frame 116 are conveyed as shown in FIG. It is preferable to provide it so as to correspond in the direction Y. Further, it is preferable to provide a lower end portion 115 c of the back plate 115 and an extension portion 116 d of the support frame 116 at the center portion in the width direction X of the transport belt 51. In this case, the lower end portion 115 c of the back plate 115 is disposed at least in the center portion in the width direction X of the conveyor belt 51. Further, the lower end portion 115 c of the back plate 115 is disposed so as to be adjacent to a part of the first portion 112 d of the base portion 112. In this case, when the base material portion 112 moves along the lower end portion 115c of the back plate 115 to remove foreign matter from the static elimination brush 111, friction due to contact between the lower end portion 115c of the back plate 115 and the base material portion 112. Since the resistance can be reduced, the base material portion 112 can be easily moved.

  35, in the modification shown in FIG. 35, as shown in FIG. 36, the lower end portion 115c of the back plate 115 and the extension portion 116d of the support frame 116 are arranged in the center portion in the width direction X and both end portions in the width direction X of the transport belt 51. It can also be provided only in the corresponding part.

  35 and 36, the extension 116d of the support frame 116 may be arranged so as not to correspond to the lower end 115c of the back plate 115 in the transport direction Y. For example, in the width direction X, the extension portions 116 d of the support frame 116 and the lower end portions 115 c of the back plate 115 are alternately arranged.

In the above embodiment, the lower end 115c of the back plate 115 can be omitted.
In the above embodiment, the bottom wall 116c of the support frame 116 can be omitted.

In the above embodiment, the extension 116d of the support frame 116 can be omitted.
In the above embodiment, the guide part 116 e of the extension part 116 d can be changed to a surface parallel to the transport belt 51.

  -In the said embodiment, it can also change into the static elimination part 210 shown in FIG.37 and FIG.38. The static elimination unit 210 includes a support shaft 213 extending in the width direction X, a cylindrical base material portion 212 provided around the support shaft 213, and a static elimination brush 211 protruding from the outer surface 212 a of the base material portion 212. As shown in FIG. 37, the base material portion 212 includes a third region A3 in which the neutralizing brush 211 is provided in the circumferential direction and a fourth region A4 in which the neutralizing brush 211 is not provided. The static eliminator 210 changes the rotational position by rotating the support shaft 213. As for the rotational position of the static elimination unit 210, the third area A3 faces the conveyance belt 51, the first position where the static elimination brush 211 and the conveyance belt 51 are in contact, and the fourth area A4 faces the conveyance belt 51. And a second position where the static elimination brush 211 and the conveyor belt 51 are separated from each other.

  -In the said embodiment, it can also change into the static elimination part 310 shown in FIG.39 and FIG.40. The static elimination unit 310 includes a support shaft 313 extending in the transport direction Y, a columnar base material portion 312 provided around the support shaft 313, and a static elimination brush 311 protruding from the outer surface 312 a of the base material portion 312. The base material portion 312 includes a fifth region A5 in which the neutralizing brush 311 is provided in the circumferential direction and a sixth region A6 in which the neutralizing brush 311 is not provided. The static eliminator 310 changes the rotational position by rotating the support shaft 313. The rotation position of the static eliminating unit 310 is such that the fifth area A5 faces the conveyor belt 51, the first position where the neutralizing brush 311 and the conveyor belt 51 contact, and the sixth area A6 faces the conveyor belt 51. And a second position where the static elimination brush 311 and the conveyor belt 51 are separated from each other.

  -In the modification shown in FIG.37 and FIG.38, the material and length of one static elimination brush 211 of the 3rd area | region A3 and the other static elimination brush 211 can be varied. In this case, it is also possible to switch the third area A3 that faces the conveyor belt 51 according to the type of the medium to be conveyed. Note that the static elimination brush 311 in the fifth region A5 of the modification shown in FIGS. 39 and 40 can be similarly changed.

  In the above embodiment, when moving the static elimination unit 110 from the first position P1 to the second position P2, before or simultaneously with the belt moving unit 60 rotating the transport belt 51 away from the static elimination unit 110, It is also possible to move the static eliminating unit 110 from the first position P1 to the second position P2.

  In the above embodiment, a conveyance roller may be employed instead of the conveyance belt 51. The transport roller may not perform electrostatic adsorption. Also in this case, the sheet 14 can be neutralized by the neutralization device 100.

  In the above embodiment, the belt moving unit 60 may not necessarily be configured to move the transport belt 51 between the recording position KP and the retracted position TP by swinging about the roller shaft of the driving roller 52. For example, the conveyance belt 51 may be configured to move between the recording position KP and the retreat position TP by parallel movement instead of movement by swinging.

  In the case of a configuration in which the transport belt 51 moves in parallel, for example, the distance between the printing surface of the paper 14 that is sucked and transported by the transport belt 51 and the recording unit 18 is suppressed in order to suppress deterioration in print quality. There is a case where a so-called gap adjustment that is adjusted by the parallel movement of 51 is performed. In such a case, the position of the conveyor belt 51 in the state where the gap adjustment is performed becomes the recording position KP. The retracted position TP of the conveyance belt 51 is a position further away (separated) from the recording unit 18 with respect to the position of the conveyance belt 51 farthest from the recording unit 18 in the gap adjustment.

  In the above embodiment, one of the two rollers on which the conveyor belt 51 is stretched does not necessarily have to be the driving roller 52 and the other roller does not have to be the driven roller 53. For example, the two rollers may all be driven rollers or may be all drive rollers.

  In the above embodiment, the conveyance belt 51 may be an endless belt stretched between a plurality of three or more rollers. In this case, at least two of the plurality of rollers are set as the driving roller 52 in the present embodiment in which one of the rollers is the center of oscillation of the transport belt 51, and the other one roller is The belt surface 51 a that conveys the paper 14 in opposition to the recording unit 18 is a driven roller 53 that forms a drive roller 52.

  In the above-described embodiment, the recording unit 18 is not limited to a so-called line head configuration including a liquid discharge head capable of simultaneously discharging ink over substantially the entire width direction X of the paper 14. For example, the recording unit 18 may have a so-called serial head configuration that includes a liquid ejection head that ejects ink to a carriage that reciprocates in the width direction X that intersects the conveyance direction of the paper 14. In the case of the serial head configuration, the longitudinal direction of the recording unit 18 is the carriage movement direction, and the transported paper 14 is intermittently transported in the transport direction Y.

  In the above embodiment, the supply source of the ink that is the recording liquid ejected from the recording unit 18 may be an ink container provided inside the housing 12 of the printer 11, for example. Alternatively, a so-called external type ink container provided outside the housing 12 may be used. In particular, in the case of an external type ink container, the capacity of ink can be increased, so that more ink can be ejected from the recording unit 18.

  When ink is supplied from the ink container provided outside the housing 12 to the recording unit 18, it is necessary to draw an ink supply tube for supplying ink from the outside to the inside of the housing 12. Therefore, in this case, it is preferable to provide the housing 12 with a hole or a notch through which the ink supply tube can be inserted. Alternatively, a gap may be provided in the housing 12 and the ink supply tube may be routed from the outside to the inside of the housing 12 through the gap. In this way, ink can be easily supplied to the recording unit 18 using the ink flow path of the ink supply tube.

  In the above embodiment, the printer 11 serving as a recording apparatus is a fluid other than ink (a liquid, a liquid obtained by dispersing or mixing functional material particles in a liquid, a fluid such as a gel, or a fluid. It may be a fluid ejecting apparatus that performs recording by ejecting or ejecting solids (including solids that can be flowed and ejected). For example, printing is performed by discharging a liquid material containing materials such as electrode materials and color materials (pixel materials) used in the manufacture of liquid crystal displays, EL (electroluminescence) displays, and surface-emitting displays. A liquid discharge device may be used. Also, a fluid discharge device for discharging a fluid such as a gel (for example, physical gel), a powder discharge device (for example, a toner jet type) for discharging a solid such as a powder (powder or particle) such as toner. Printing device). The present invention can be applied to any one of these fluid ejection devices. In the present specification, the term “fluid” is a concept that does not include a fluid consisting only of gas. Examples of the fluid include liquid (inorganic solvent, organic solvent, solution, liquid resin, liquid metal (metal melt), etc. ), Liquids, fluids, powders (including granules and powders), and the like.

  DESCRIPTION OF SYMBOLS 11 ... Printer (recording apparatus), 14 ... Paper (medium), 18 ... Recording part, 50 ... Conveyance part, 52 ... Drive roller, 60 ... Belt moving part, 99 ... Control part, 110 ... Static elimination part, 111 ... Static elimination brush (Static elimination member), 112 ... base material part (long member), 112c ... hole, 112d ... first part, 112e ... second part, 113 ... first pulley, 114 ... second pulley, 121 ... Movement path, 122 ... linear path, 123 ... curved path, 130 ... drive unit, 131 ... motor, 132 ... driven pulley, 133 ... drive pulley, 134 ... belt, Sc ... position sensor, A1 ... first area, A2 ... 2nd area | region, P1 ... 1st position, P2 ... 2nd position.

Claims (6)

A transport unit for transporting the medium in the transport direction;
A recording unit for recording on the medium conveyed by the conveying unit;
A long member provided upstream of the recording unit in the transport direction and extending in a direction intersecting the transport direction of the medium; and the medium protruding from the outer surface of the long member and transported by the transport unit A neutralization unit having a neutralization member that neutralizes the recording surface of the medium by contact, and
The neutralization unit has a first state in which the conveyance unit and the neutralization member are close to each other when a portion of the long member facing the conveyance unit is displaced, and the conveyance unit and the neutralization member are A recording apparatus configured to be switchable between a second state and a second state separated from the first state. The recording apparatus according to claim 1, wherein the static elimination unit has a plurality of regions on the elongated member, each having a different protruding height of the static elimination member. The recording apparatus according to claim 1, wherein the long member is endless. The recording apparatus according to claim 1, wherein at least one hole is formed in the long member. The recording apparatus according to any one of claims 1 to 4, wherein the static elimination member is not provided in a portion of the long member that faces the transport unit when the static elimination unit is in the second state. . A conveying belt provided in the conveying unit and conveying the medium in the conveying direction;
A driving roller for rotationally driving the conveyor belt;
A belt moving unit that rotates the conveyor belt around the drive roller in a direction approaching the neutralization unit and in a direction away from the neutralization unit;
A controller that controls the static eliminator and the belt moving unit,
The control unit, when switching the neutralization unit from the first state to the second state, causes the belt moving unit to rotate the conveyance belt in a direction away from the neutralization unit, The recording apparatus according to claim 1, wherein the recording apparatus is switched from the first state to the second state.

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