JP2009155023A - Recording medium conveying device and recording device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a recording medium conveying device capable of cleaning a reading part with a simple constitution. <P>SOLUTION: An ink jet printer 1 has a paper conveying device 15 for conveying a paper. The paper conveying device 15 has a pair of belt rollers 6, 7 and an endless conveying belt 8 wound so as to be laid between both rollers 6, 7. A cleaning sheet 65 is attached to on the outer peripheral surface of the conveying belt 8 and a projection part 66 is formed on the inner peripheral surface. When the conveying belt 8 runs, the projection part 66 gets into between the conveying belt 8 and the belt roller 6. Then, the cleaning sheet 65 is pushed up to an image sensor 201 side and brought into contact with a reading surface of the image sensor 201. The cleaning sheet 65 wipes out the reading surface of the image sensor 201 in the conveying direction to clean through running of the conveying belt 8 in such a state that the cleaning sheet 65 comes in contact with the reading surface of the image sensor 201. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a recording medium transport apparatus including a transport mechanism for transporting a recording medium, and a recording apparatus including the same.

  In recent years, development of an ink jet printer using a line head having a printing range equal to or larger than the width of a recording medium has been advanced. In such a line printer, only one nozzle is responsible for printing an extremely narrow area along the conveyance direction of the recording medium. Accordingly, even if the number of defective nozzles is small, white lines or unevenness are formed on the recording medium, so that the image quality is greatly deteriorated.

  Therefore, in the ink jet recording apparatus disclosed in Patent Document 1, a reading unit that reads a chart printed on a recording sheet, that is, a line type image sensor is provided at a position adjacent to the downstream side in the conveyance direction of the line head. . Then, the non-ejection nozzles of the line head are detected from the image data obtained by the reading unit. As a result, even when there are non-ejection nozzles, significant image deterioration is prevented from occurring by performing a predetermined complement process.

Japanese Patent Laying-Open No. 2006-18779 (FIG. 1)

  The glass surface, which is the reading surface of the reading unit employed in the ink jet recording apparatus of Patent Document 1, is always exposed to ink floating mist. If foreign matter such as ink mist adheres and the glass surface becomes dirty, accurate image reading cannot be performed, and erroneous detection may occur.

  Therefore, in the ink jet recording apparatus of Patent Document 1, when the glass surface is dirty, the reading unit is moved upward, and the cleaning blade is moved below the glass surface along the paper conveyance direction, and then the reading unit. The ink mist adhering to the glass surface is removed by sliding the cleaning blade on the glass surface along the longitudinal direction. However, in Patent Document 1, a mechanism for moving the cleaning blade in two directions is required in addition to a mechanism for moving the reading unit up and down, and the apparatus becomes complicated and large.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a recording medium transport apparatus capable of cleaning a reading section and having a simple configuration, and a recording apparatus including the same.

  The recording medium conveyance according to the present invention includes a conveyance mechanism having an annular conveyance surface that conveys a recording medium and the conveyance surface of the conveyance mechanism so as to be any one of the conveyance surface and the recording medium on the conveyance surface. A reading unit that reads an image; and a first cleaning member that is disposed on the conveyance surface of the conveyance mechanism and cleans the reading unit in contact with the reading unit. The first cleaning member contacts the reading unit while the first cleaning member moving by the transport mechanism faces the reading unit.

  According to the recording medium conveying apparatus of the present invention, the reading unit is cleaned by moving the first cleaning member in contact with the reading unit while the first cleaning member moving by the conveying mechanism faces the reading unit. To do. Thereby, it is not necessary for the user to clean the reading unit, and the reading unit can be cleaned with a simple configuration using the movement of the first cleaning member by the transport mechanism.

  Further, the first cleaning member and the reading unit are arranged so that the first cleaning member contacts the reading unit while the first cleaning member moved by the transport mechanism is opposed to the reading unit. It is preferable to further include a moving means for relatively moving one of them. Accordingly, even if the first cleaning member and the reading unit are separated when facing each other, either the first cleaning member or the reading unit is relatively moved by the moving unit, and the first cleaning member is brought into contact with the reading unit. be able to.

  Further, the transport mechanism is a belt type having a pair of rollers and a transport belt spanned between the pair of rollers, and the reading unit includes the first roller of one of the pair of rollers and the The moving means includes a protruding portion that protrudes from an area of the inner peripheral surface opposite to the area of the conveying surface on which the first cleaning member of the conveying belt is disposed. When the protrusion is moved by the travel of the conveyor belt accompanying the rotation of the pair of rollers, and the protrusion enters between the conveyor belt and the first roller, the first cleaning member reads the reading It is preferable to clean the reading unit by moving toward the unit and contacting the reading unit. According to this, the first cleaning member can be moved toward the reading unit with a simple configuration using the movement of the protruding portion by the conveyor belt.

  In addition, it is preferable that the protruding portion extends over the entire width in a direction orthogonal to the conveying direction of the reading unit. According to this, when the protruding portion enters between the conveying belt and the first roller, the first cleaning member is moved toward the reading portion without bending, and the first cleaning member is made uniform. The reading unit can be brought into contact with the pressing force.

  In addition, the protrusion has a flat portion that is longer in the transport direction than the width of the reading unit in the transport direction, and an inclination that is inclined in a direction away from the flat portion along the transport direction with the flat portion interposed therebetween. It is preferable to have a part. According to this, since it has the inclination part inclined in the direction which leaves | separates from a flat part along a conveyance direction, the said protrusion part penetrates smoothly between the said conveyance belt and the said 1st roller, and the 1st cleaning member Can be smoothly moved toward the reading unit. Therefore, the first cleaning member can be smoothly brought into contact with the reading unit. In addition, since the protruding portion has a flat portion that is longer in the conveyance direction than the width of the reading portion in the conveyance direction, the first cleaning member does not move away from the reading portion before cleaning the reading portion. The entire surface can be cleaned.

  Furthermore, it is preferable that a thickness of the protruding portion in a direction facing the conveying belt is larger than a distance between the reading unit and the first cleaning member. According to this, the pressing force when the first cleaning member comes into contact with the reading unit can be increased, and the cleaning effect can be enhanced.

  In addition, it is preferable to further include a second cleaning member that is disposed on the surface of the protruding portion and cleans the pair of rollers. According to this, when a protrusion part enters between a conveyance belt and a roller, a 2nd cleaning member and a roller can contact and it can clean a roller. Moreover, since the protrusion has a large pressing force against the roller, the cleaning effect can be enhanced.

  In addition, the moving unit includes a first lifting mechanism that lifts and lowers the reading unit in a direction facing the transport surface, and the first cleaning member that is moved by the transport mechanism is facing the reading unit. In the meantime, it is preferable to further include a first elevating control means for controlling the driving of the first elevating mechanism so that the reading unit is lowered to bring the first cleaning member into contact with the reading unit. According to this, while the 1st cleaning member is facing the reading part, a reading part can be moved toward the 1st cleaning member so that the 1st cleaning member may contact a reading part.

  Furthermore, it is preferable that the first cleaning member is made of a sheet-like felt. According to this, a 1st cleaning member can be easily comprised only by sticking a sheet-like felt on a conveyance surface.

  In addition, the image forming apparatus further includes a conveyance roller that rotates while contacting the conveyance surface of the conveyance mechanism, and a rotation control unit that controls a rotation speed of the conveyance roller, and the rotation control unit includes the first cleaning unit. While the member is moved by the transport mechanism and is in contact with the transport roller, it is preferable that a speed difference is provided between the rotational speed of the transport roller and the moving speed of the first cleaning member. Thus, the conveyance roller can be cleaned by the first cleaning member by providing a speed difference between the moving speed of the first cleaning member and the rotation speed of the conveyance roller.

  The recording apparatus of the present invention includes any one of the above-described recording medium conveyance devices and a recording head in which a discharge surface for discharging a liquid is disposed to face the conveyance surface of the conveyance mechanism. The first cleaning member does not contact the recording head while the first cleaning member moving by the transport mechanism faces the recording head.

  According to the recording apparatus of the present invention, the lifetime of the first cleaning member can be extended because the first cleaning member moving by the transport mechanism does not contact the recording head. Moreover, when the discharge surface is not dirty and it is not necessary to clean the discharge surface, it is possible to prevent the discharge surface from becoming dirty by cleaning the discharge surface with the first cleaning member.

  On the other hand, the recording apparatus of the present invention includes any one of the above-described recording medium conveyance devices, a recording head in which a discharge surface for discharging a liquid is disposed to face the conveyance surface of the conveyance mechanism, and the recording head as the conveyance surface. A second lifting mechanism that moves up and down in a direction opposite to the first cleaning member, and while the first cleaning member is moved by the transport mechanism and faces the recording head, the recording head is lowered to Second elevating control means for controlling driving of the second elevating mechanism so as to contact the ejection surface of the recording head.

  According to the recording apparatus of the present invention, the ejection surface of the recording head can be cleaned with a simple configuration using the movement of the first cleaning member by the transport mechanism.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. The present embodiment is an example in which the present invention is applied to an ink jet printer that records characters, images, and the like by ejecting ink onto recording paper.

<Schematic configuration of inkjet printer>
First, the overall configuration of an ink jet printer (recording apparatus) including a sheet conveying apparatus according to an embodiment of the recording medium conveying apparatus of the present invention will be described. FIG. 1 is a schematic side view of an inkjet printer according to an embodiment of the present invention. As shown in FIG. 1, the ink jet printer 1 is a color ink jet printer having four ink jet heads 2 (recording heads) that respectively eject magenta, cyan, yellow, and black inks. The inkjet printer 1 is provided with a paper feed mechanism 11 on the left side in FIG. 1 and a paper discharge unit 12 on the right side in FIG.

  Inside the inkjet printer 1, a paper conveyance path is formed through which a paper as a recording medium is conveyed from the paper supply mechanism 11 toward the paper discharge unit 12. The paper feed mechanism 11 is provided with a pickup roller 22. When the pickup roller 22 is rotated by the drive of a pickup motor 132 (see FIG. 4), the uppermost sheet in the sheet tray 21 is fed out and sent from the left to the right in FIG. A paper transport device 15 (recording medium transport device) that transports the paper in the sub-scanning direction (a direction along the transport direction B) is disposed at an intermediate portion of the paper transport path. The sheet conveying device 15 includes a pair of belt rollers 6 and 7 and an endless conveying belt 8 wound so as to be bridged between the rollers 6 and 7. An annular outer peripheral surface of the conveyance belt 8 includes an outward path surface 8 a that conveys the sheet facing the inkjet head 2 and a return path surface 8 b that travels in a direction opposite to the sheet conveyance direction.

  The outer peripheral surface of the conveyor belt 8 is subjected to silicone treatment and has adhesiveness. A pressing roller 5 (conveying roller) that rotates while being in contact with the forward path surface 8a of the conveying belt 8 is disposed immediately downstream of the paper feeding mechanism 11 and facing the belt roller 7 with the conveying belt 8 interposed therebetween. The sheet fed from the sheet feeding mechanism 11 is pressed against the forward path surface 8 a of the conveyor belt 8. As a result, the sheet pressed against the forward path surface 8a is transported along the transport direction B while being held by the adhesive force of the forward path surface 8a. The paper held on the forward path surface 8a of the transport belt 8 is peeled off from the forward path surface 8a by a peeling plate (not shown) and sent to the paper discharge unit 12 on the right side. At this time, the belt roller 6 on the downstream side in the paper conveyance direction is applied with a driving force from a conveyance motor 133 (see FIG. 4), and rotates clockwise (in the direction of arrow A) in FIG.

  The pressing roller 5 is supported by a support member 60 fixed to the printer main body via a cylinder 61 with a rotation axis along the main scanning direction (a direction orthogonal to the paper surface of FIG. 1). The cylinder 61 moves the pressing roller 5 up and down in a direction facing the conveying belt 8 (up and down direction in FIG. 1) under the control of a pressing roller lifting control unit 117 described later.

  A sheet-like cleaning sheet 65 (first cleaning member) formed of felt is attached to a part of the outer peripheral surface of the conveyor belt 8. When the cleaning sheet 65 is positioned on the forward path surface 8a or the return path surface 8b, the cleaning sheet 65 has the same width as the width in the sub-scanning direction of the image sensor 201 described later with respect to the sub-scanning direction (conveyance direction). Extending over the width in the main scanning direction. As will be described in detail later, the cleaning sheet 65 is used to remove foreign matters such as ink and paper dust attached to the reading surface of the image sensor 201 as the conveyance belt 8 travels, and to clean the reading surface.

  A region of the inner peripheral surface opposite to the region of the outer peripheral surface to which the cleaning sheet 65 of the conveying belt 8 is attached protrudes. The protrusion 66 extends over the width of the conveyor belt 8. Further, when the protruding portion 66 is positioned on the forward path surface 8a or the backward path surface 8b, the flat portion 66a that is slightly longer along the transport direction than the width of the image sensor 201 in the sub-scanning direction is transported across the flat portion 66a. And an inclined portion 66b inclined in a direction away from the flat portion 66a along the direction. Further, the thickness X of the protruding portion 66 in the direction facing the conveying belt 8 (vertical direction in FIG. 1) is the distance between the image sensor 201 and the cleaning sheet 65 positioned on the forward path surface 8a in the vertical direction in FIG. It is slightly larger than Y (see FIG. 5A).

  A sheet-like cleaning sheet 67 (second cleaning member) made of felt is attached to the surface of the flat portion 66a of the protruding portion 66. As will be described in detail later, the cleaning sheet 67 cleans the pair of belt rollers 6 and 7 by removing foreign matters such as paper dust attached to the pair of belt rollers 6 and 7 as the conveyor belt 8 travels. Used for.

  FIG. 2 is a partial plan view of the ink jet printer 1. 3 is a cross-sectional view taken along line III-III depicted in FIG. As shown in FIG. 2, each of the four inkjet heads 2 extends in the main scanning direction (the direction perpendicular to the sub-scanning direction and perpendicular to the paper surface of FIG. 1), and the sub-scanning direction (conveyance) (Direction along direction B). That is, the ink jet printer 1 is a line printer. As shown in FIGS. 1 and 3, the inkjet head 2 has a head body 3 at the lower end thereof. The head body 3 includes a flow path unit in which a plurality of individual ink flow paths including pressure chambers are formed and an actuator that applies pressure to the ink in the pressure chamber, and has an elongated rectangular parallelepiped shape in the main scanning direction. Have. On the bottom surface of the head body 3, that is, the ejection surface 3a, a large number of ejection openings with small diameters for ejecting ink are formed side by side.

  As shown in FIGS. 1 and 3, a reservoir unit 10 that temporarily stores ink is fixed to the upper surface of the head body 3. The reservoir unit 10 is longer than the head body 3 and protrudes from both longitudinal sides of the head body 3. In the protruding portion, the reservoir unit 10 is fixed to the frame 4 having a rectangular opening so that the discharge surface 3a is exposed downward from the opening. More specifically, a pair of flanges 4a that support the reservoir unit 10 from the lower side protrude from the opposite sides of the frame 4 toward the inside of the opening. The flange 4 a and both ends of the reservoir unit 10 in the longitudinal direction are fixed with screws 50. The discharge surface 3 a is almost the same height as the bottom surface of the frame 4.

  The head body 3 is arranged so that the ejection surface 3a and the forward path surface 8a of the transport belt 8 are parallel to each other and a slight gap is formed between the ejection surface 3a and the transport belt 8. Yes. The gap constitutes a part of the paper transport path. When the paper that is conveyed while being held on the forward path surface 8a of the conveyance belt 8 sequentially passes immediately below the four head bodies 3, ink of each color is ejected toward the upper surface of the paper, that is, the printing surface. Thus, a desired color image is formed on the paper.

  In the present embodiment, an image sensor 201 (reading unit) is attached to a region further downstream of the four inkjet heads 2 along the transport direction and facing the belt roller 6 with the transport belt 8 interposed therebetween. Yes. Details of the image sensor 201 will be described later.

<Elevating mechanism>
As shown in FIGS. 2 and 3, the frame 4 is supported by a pair of lifting mechanisms 51 (second lifting mechanisms) provided in the printer 1 so as to be movable in the vertical direction. The pair of lifting mechanisms 51 are arranged on both sides of the four inkjet heads 2 with respect to the sub-scanning direction. Each lifting mechanism 51 includes a head motor 52 as a drive source for moving the frame 4 in the vertical direction, a pinion gear 53 fixed to the shaft of the head motor 52, a rack gear 54 that meshes with the pinion gear 53, and the pinion gear 53. And a guide 56 disposed at a position sandwiching the rack gear 54. As will be described later, the elevating mechanism 51 is driven based on the control of the control unit 101.

  The head motors 52 included in the elevating mechanism 51 are respectively fixed to a pair of main body frames 1 a of the inkjet printer 1. The pair of body frames 1a are arranged to face each other in the sub-scanning direction. The rack gear 54 extends in the vertical direction, and the lower end thereof is fixed to the side surface of the frame 4. The side surface of the rack gear 54 opposite to the pinion gear 53 is slidably in contact with the guide 56. The guide 56 is fixed to the main body frame 1a.

  When the two head motors 52 are synchronized and the pinion gear 53 is rotated in the forward / reverse direction, the rack gear 54 moves upward or downward. As the rack gear 54 moves, the frame 4 moves up and down with the four inkjet heads 2 in the vertical direction.

  A pair of guide units 59 are disposed on both sides of the frame 4 along the sub-scanning direction. Each guide unit 59 includes a bar 58 and a pair of guides 57 sandwiching the bar 58. As shown in FIG. 3, the pair of guides 57 extend in the vertical direction and are respectively fixed to the pair of main body frames 1 b of the inkjet printer 1. The pair of main body frames 1b are arranged to face each other in the main scanning direction. The bar 58 extends in the vertical direction similarly to the guide 57 and is fixed to the side surface of the side of the frame 4 facing the main body frame 1b. The bar 58 is slidably in contact with each of the pair of guides 57.

  The guide unit 59 prevents the ejection surface 3 a of the inkjet head 2 from being inclined with respect to the forward path surface 8 a of the conveyance belt 8 when the frame 4 is vertically moved by the lifting mechanism 51. That is, even when the frame 4 and the inkjet head 2 are moved up and down in the vertical direction by the lifting mechanism 51, the discharge surface 3a is always parallel to the forward path surface 8a. As a result, the accuracy of ink landing on the paper is improved during printing.

  Usually, the frame 4 is moved in the direction of arrow C in FIG. 3 by the elevating mechanism 51, so that the four inkjet heads 2 eject ink onto the paper in order to print on the paper (position shown in FIG. 3). ). During maintenance of the inkjet head 2 (when purging forcibly ejecting ink from the inkjet head 2, wiping off ink adhering to the ejection surface 3a, and covering the ejection surface 3a with a cap), the frame 4 Is moved in the direction of arrow C in FIG. 3 by the elevating mechanism 51, and the four inkjet heads 2 are arranged at the head maintenance position above the printing position. After the maintenance of the inkjet head 2, the frame 4 is moved in the direction opposite to the direction of arrow C in FIG. 3 by the elevating mechanism 51 and is disposed at the cleaning position close to the forward path surface 8a.

<Image sensor>
Returning to FIG. 1, the image sensor 201 is attached to a position that is further downstream of the four inkjet heads 2 along the conveyance direction and faces the belt roller 6 with the conveyance belt 8 interposed therebetween. 8 facing the forward path surface 8a and slightly spaced from the forward path surface 8a. The image sensor 201 includes an imaging element made of, for example, CIS, CCD, CMOS, etc., and has an imaging range that is the same as or slightly wider than the printable range of the inkjet head 2 in the main scanning direction. That is, the image sensor 201 is a line type sensor. On the other hand, the width of the sheet conveyed along the conveyance direction (the length along the main scanning direction of the inkjet head 2) is somewhat narrower than the printable range of the inkjet head 2. Therefore, even if the sheet is conveyed with a slight shift in the width direction, the image sensor 201 can read the sheet over its entire width. As will be described later, the image sensor 201 is used to read a test image printed on the outer peripheral surface of the transport belt 8 or on a sheet.

  The lower surface of the image sensor 201, that is, the reading surface is parallel to the lower surface of the inkjet head 2, that is, the ejection surface 3 a and is at the same height, and is disposed so as to face the forward path surface 8 a of the conveyance belt 8. The distance from the forward path surface 8a of the conveyance belt 8 to the reading surface and the distance from the upper surface of the paper placed on the forward path surface 8a to the reading surface are formed on the image formed on the outer peripheral surface and the paper. It is determined in advance that the image sensor 201 can read the formed image, that is, the image data obtained when the image sensor 201 reads the image indicates a focused image.

<Configuration of maintenance unit>
2 and 3, the maintenance unit 70 for performing maintenance on the inkjet head 2 will be described. The maintenance unit 70 is disposed on the left side of the inkjet head 2. The maintenance unit 70 has two trays 71 and 75 that can move horizontally. Among these, the tray 71 has a substantially square box shape opened upward, and includes the tray 75. The tray 71 and the tray 75 are engaged with a later-described concave portion 74b and a convex portion 83a, and when the engagement is released, the two are connected and the two are released. Can be switched.

  When the maintenance unit 70 moves horizontally to the right, the frame 4 moves to the upper head maintenance position (in the direction of arrow C in FIG. 3) in advance, and the maintenance unit is located between the four ejection surfaces 3 a and the conveyor belt 8. A space for 70 is secured. Thereafter, the maintenance unit 70 moves horizontally in the direction of arrow D in FIG. When the side surface farther from the inkjet head 2 is opened and the engagement between the concave portion 74b and the convex portion 83a is released (for example, during the purge operation), the tray 71 leaves the tray 75 to be included, Only 71 moves horizontally to the right.

  A waste ink receiving tray 77 is disposed immediately below the maintenance unit 70. The waste ink receiving tray 77 has a size including the tray 71 in a plan view, and even when the tray 71 moves to the right end in FIG. 2, the edge of the tray 71 opposite to the inkjet head 2 overlaps. have. An ink discharge hole 77 a is formed at the end of the waste ink receiving tray 77 that is closer to the inkjet head 2. The ink discharge hole 77a distributes the ink that has flowed onto the waste ink receiving tray 77 to a waste ink reservoir (not shown).

  In the tray 71, a wiper 72 and a tray 75 are arranged in order from the side close to the inkjet head 2. In the tray 75, four caps 76 having a rectangular planar shape are provided side by side corresponding to each inkjet head 2. Each cap 76 has a longitudinal direction parallel to the longitudinal direction of the inkjet head 2 and is arranged at the same pitch as the inkjet head 2 in the sub-scanning direction.

  The cap 76 includes a plate-like member 76b having a rectangular planar shape that is substantially the same size as the ejection surface 3a, and an annular protrusion 76a that protrudes upward from the peripheral edge of the plate-like member 76b. The annular protrusion 76a is made of an elastic material such as rubber, and has a size and a shape facing the peripheral edge of the discharge surface 3a. The cap 76 forms a sealed space when the annular protrusion 76a and the peripheral edge of the discharge surface 3a come into contact with each other. Thus, the cap 76 can cover the ejection surface 3a. Each cap 76 is biased upward while being supported on the bottom surface of the tray 75 by two springs (not shown).

  In addition to the wiper 72, a holding member 74 on which an attachment member 78 is disposed is fixed to the tray 71. The holding member 74 has a U-shaped planar shape. A groove 74a extending along the sub-scanning direction is formed on the upper surface of the portion of the holding member 74 along the sub-scanning direction. An attachment member 78 and a wiper 72 are disposed in the groove 74a. On the other hand, concave portions 74b are formed on the upper surfaces of the two portions extending from the holding member 74 in the main scanning direction.

  The wiper 72 is made of an elastic material such as rubber. The wiper 72 is formed slightly longer than the entire width of the four inkjet heads 2 arranged in parallel, and is fixed to the attachment member 78 so that the longitudinal direction thereof is along the sub-scanning direction. The attachment member 78 has a rectangular parallelepiped shape extending in the same direction as the wiper 72.

  In the vicinity of the left and right sides of the trays 71 and 75, a recess 74b and a hooking member 83 are provided. The hook member 83 extends in the main scanning direction and is rotatable at the center thereof. A convex portion 83 a is formed at the end of the hook member 83 that is closer to the inkjet head 2. When the hook member 83 rotates clockwise in FIG. 3, the convex portion 83a is engaged with the concave portion 74b. Above the maintenance unit 70, contact members 84 are arranged corresponding to the two hook members 83, respectively. The tray 71 and the tray 75 switch between a state in which the tray 71 and the tray 75 are connected and a state in which the connection between the tray 71 and the tray 75 is released depending on whether or not the concave portion 74b and the convex portion 83a are engaged. It is possible.

  The abutting member 84 is supported so as to be rotatable. When the abutting member 84 is rotated clockwise in FIG. 3, one end thereof abuts on the other end 83 b of the hooking member 83. When these contact members 84 are further rotated clockwise, the hook member 83 is rotated counterclockwise, and the engagement between the convex portion 83a and the concave portion 74b is released. On the other hand, when the contact member 84 rotates counterclockwise and moves away from the end portion 83b, the convex portion 83a engages with the concave portion 74b due to the weight of the hook member 83.

  When the maintenance of the inkjet head 2 is not performed, the maintenance unit 70 is stationary at a “retracted position” that does not face the inkjet head 2 as shown in FIGS. 2 and 3. When maintenance is performed, the maintenance unit 70 moves horizontally from the retracted position to the “maintenance position” facing the ejection surface 3 a of the inkjet head 2. At this time, since the frame 4 is disposed at the head maintenance position, the tips of the wiper 72 and the cap 76 do not contact the ejection surface 3a.

  Even during maintenance, during the purge operation, the tray 75 remains and only the tray 71 moves from the retracted position to the maintenance position and receives the discharged ink. When covering the discharge surface 3a with the cap 76, the tray 71 and the tray 75 are connected by the engagement of the concave portion 74b and the convex portion 83a, and the maintenance unit 70 moves to a position where the cap 76 and the discharge surface 3a face each other.

  Each tray 71, 75 is slidably supported by a pair of guide shafts 96a, 96b extending in the main scanning direction. The tray 71 is provided with two bearing members 97a and 97b. The bearing members 97 a and 97 b protrude from the left and right side surfaces of the holding member 74. The tray 75 is provided with two bearing members 98a and 98b. The bearing members 98 a and 98 b protrude from the left and right side surfaces of the tray 75. Further, both ends of the pair of guide shafts 96a and 96b are fixed to the main body frames 1b and 1d, and are disposed parallel to each other between the frames 1b and 1d.

  Here, a horizontal movement mechanism 91 that moves the trays 71 and 75 in the horizontal direction (arrow D direction) along the guide shafts 96a and 96b will be described. As shown in FIG. 2, the horizontal movement mechanism 91 includes a tray motor 92, a motor pulley 93, an idle pulley 94, a timing belt 95, guide shafts 96a and 96b, and the like.

  The tray motor 92 is fixed to an attachment portion 1c formed at an end portion of the main body frame 1b extending in parallel with the sub-scanning direction. The motor pulley 93 is connected to the tray motor 92 and rotates as the tray motor 92 is driven. The idle pulley 94 is rotatably supported by the leftmost main body frame 1d in FIG. The timing belt 95 is disposed in parallel with the guide shaft 96 a and is wound so as to be bridged between the motor pulley 93 and the idle pulley 94. Further, the timing belt 95 is connected to a bearing member 97 a provided on the holding member 74.

  In this configuration, when the tray motor 92 is driven, the timing belt 95 travels as the motor pulley 93 rotates in the forward or reverse direction. As the timing belt 95 travels, the tray 71 connected to the timing belt 95 via the bearing 97a moves along the horizontal direction. When the concave portion 74b of the holding member 74 and the convex portion 83a are engaged, the wiper 72 in the tray 71 and the cap 76 in the tray 75 move together. On the other hand, when the convex portion 83a is not engaged with the concave portion 74b, only the wiper 72 in the tray 71 moves.

<Control system>
Next, the control system of the inkjet printer 1 will be described with reference to FIG. The inkjet printer 1 includes a control unit 101 that controls the operation of the printer. The control unit 101 includes a CPU (Central Processing Unit) that is an arithmetic processing unit, a ROM (Read Only Memory) that stores a control program executed by the CPU and data used for the control program, and data when the program is executed. RAM (Random Access Memory) for temporary storage. These include a printing control unit 112, a conveyance control unit 113, a head lifting control unit 114 (second lifting control unit), a maintenance control unit 115, a pressing roller rotation control unit 116 (rotation control unit), and a pressing roller lifting control unit 117. Function as.

  The ink jet printer 1 takes one of a normal recording mode, a discharge defect inspection mode, a conveyance defect inspection mode, and a maintenance mode. The normal recording mode is a mode in which an image desired by the user is printed on paper. In the ejection failure inspection mode, a test image is formed on the outer peripheral surface of the transport belt 8 or on the paper by ejecting ink from each inkjet head 2, the test image is read by the image sensor 201, and the ejection failure is inspected based on the read image. It is a mode to do. In the conveyance failure inspection mode, the image of the sheet conveyed by the conveyance belt 8 is read by the image sensor 201, and the shift amount in the main scanning direction of the sheet from the reference position based on the read image, the inclination of the sheet with respect to the conveyance direction. In this mode, an angle or the like is calculated and a conveyance failure is inspected. The maintenance mode is a mode in which a maintenance operation such as a flushing operation is performed on the four inkjet heads 2.

  The control unit 101 determines which mode the inkjet printer 1 takes based on the establishment of a predetermined condition, and controls the operation of each unit of the printer according to the mode. For example, when the number of printed sheets reaches a predetermined number, the inkjet printer 1 sequentially takes a discharge defect inspection mode and a conveyance defect inspection mode before performing printing of a predetermined number or more in the normal recording mode. The ink jet printer 1 enters the maintenance mode, for example, when printing is not performed for a predetermined period of time and before printing is performed, or when it is determined as a discharge failure as a result of the inspection in the discharge failure inspection mode. The control unit 101 may determine which mode the inkjet printer 100 takes based on a command transmitted from a PC (personal computer) 100 by a user operation other than when the above conditions are satisfied. Good.

  When the ink jet printer 1 is in the normal recording mode, the head control unit 112 controls the head driving circuit 121 so that ink is ejected from the corresponding ink jet head 2 based on the print data received from the PC 100. Further, the head controller 112 controls the head drive circuit 121 so that a test image is printed on the outer peripheral surface of the conveyor belt 8 or on the paper when the inkjet printer 1 is in the ejection defect inspection mode or the conveyance defect inspection mode. To do. Here, the image data relating to the test image may be received from the PC 100 or stored in the ROM of the inkjet printer 1.

  When the inkjet printer 1 is in the normal recording mode, the conveyance control unit 113 rotates the pickup roller 22 by driving the pickup motor 132 so that the uppermost sheet in the sheet tray 21 is sent out onto the conveyance belt 8. In addition to controlling the motor driver 122, the belt roller 6 is rotated by driving the conveyance motor 133, and the motor driver 123 is controlled such that the sheet is conveyed while being held on the forward path surface 8 a of the conveyance belt 8. Further, the conveyance control unit 113 controls the motor driver 123 so that the rotation of the belt roller 6 is stopped by stopping the driving of the conveyance motor 133 after the paper on the conveyance belt 8 reaches the paper discharge unit 12.

  The head lifting control unit 114 adjusts the height of the frame 4 and the four inkjet heads 2 by controlling the lifting mechanism 51. Specifically, the head lifting control unit 114 controls a motor driver 125 (which is a part of the lifting mechanism 51) that drives the head motor 52 shown in FIG. The head lifting control unit 114 controls the motor driver 125 so that the frame 4 is positioned at the head maintenance position when the ink jet printer 1 is in the normal recording mode and the ink is initially introduced into the head 2 and when the head 2 is maintained. . Thereafter, the motor driver 125 is controlled so that the frame 4 is positioned at the cleaning position. Further, when the ink jet printer 1 is in the normal recording mode and printing is performed, the motor driver 125 is controlled so that the frame 4 is positioned at the printing position. Further, when the inkjet printer 1 is in the ejection failure inspection mode or the conveyance failure inspection mode, the motor driver 125 is controlled so that the frame 4 is positioned at the printing position.

  The maintenance control unit 115 controls the maintenance unit 70. Specifically, the maintenance control unit 115, after the completion of purging, after the completion of purging so that the tray 71 moves horizontally from the standby position to the maintenance position by driving the tray motor 92 at the time of initial ink introduction to the head 2 and at the time of purging. From the PC 100, the tray 71 and 75 are horizontally moved from the standby position to the cap position by the drive of the tray motor 92 during capping so that the tray 71 is horizontally moved from the maintenance position to the standby position by the drive of the motor 92. When the print data is received, the motor driver 127 is controlled so that the trays 71 and 75 move horizontally from the cap position to the standby position by driving the tray motor 92. Further, the maintenance control unit 115 controls a pump driver (both not shown) so that the ink in the ink cartridge is forcibly sent to the head body 3 by the pump at the time of initial ink introduction to the head 2 and at the time of purging. To do.

  When the pressing roller 5 and the cleaning sheet 65 are not opposed to each other, the pressing roller rotation control unit 116 drives the pressing motor 134 so that the rotation speed of the pressing roller 5 becomes the same as the traveling speed of the conveying belt 8. 124 is controlled. Further, when the pressing roller 5 and the cleaning sheet 65 face each other, the pressing roller rotation control unit 116 increases the rotation speed of the pressing roller 5 by driving the pressing motor 134 so that the moving speed of the cleaning sheet 65 and the pressing roller 5 are increased. The motor driver 124 is controlled so as to have a speed difference with the rotation speed of the motor. Counting is started from the time when the image sensor 201 reads a test image printed on the outer peripheral surface of the conveyor belt 8 or on the paper, and the counting time is suppressed from the traveling speed of the conveyor belt 8 and the image sensor 201. When the time for the cleaning sheet 65 calculated from the distance to the roller 5 to move to the pressing roller 5 is reached, it is determined that the pressing roller 5 and the cleaning sheet 65 face each other.

  When the pressing roller 5 and the cleaning sheet 65 are not opposed to each other, the pressing roller raising / lowering control unit 117 controls the cylinder 61 so as to move the pressing roller 5 in a direction in which the pressing roller 5 contacts the conveying belt 8 (downward in FIG. 1). Further, the pressing roller raising / lowering control unit 117 controls the cylinder 61 so as to move the pressing roller 5 away from the conveying belt 8 (upward in FIG. 1) when the pressing roller 5 and the cleaning sheet 65 face each other. At this time, the distance that the pressing roller 5 is separated from the conveying belt 8 is slightly smaller than the thickness of the protruding portion 66 in the direction facing the conveying belt 8.

<Operation of the cleaning sheet as the conveyor belt runs>
As shown in FIG. 5A, when the conveyor belt 8 travels with the rotation of the belt roller 6, the cleaning sheet 65, the protrusion 66, and the cleaning sheet 67 move. When the conveyor belt 8 continues to travel, the protrusion 66 enters between the conveyor belt 8 and the belt roller 6 as shown in FIG. At this time, the thickness of the protruding portion 66 in the direction facing the conveyance belt 8 is slightly larger than the distance between the image sensor 201 and the cleaning sheet 65, so that the cleaning sheet 65 is on the image sensor 201 side ( The image sensor 201 is pushed up to contact the reading surface of the image sensor 201. Then, with the cleaning sheet 65 in contact with the reading surface of the image sensor 201, the conveyance belt 8 travels, so that the cleaning sheet 65 wipes and cleans the reading surface of the image sensor 201 in the conveyance direction. That is, while the cleaning sheet 65 moving by the conveyor belt 8 faces the image sensor 201, the cleaning sheet 65 contacts the reading surface of the image sensor 201 to clean the reading surface.

  Further, since the cleaning sheet 67 is attached to the surface of the protruding portion 66, the cleaning sheet 67 is moved to the belt roller when the protruding portion 66 moves between the conveying belt 8 and the belt roller 6. Clean the outer peripheral surface of 6. The cleaning sheet 67 also cleans the outer peripheral surface of the belt roller 7 in the same manner.

  Further, as shown in FIG. 6, when the conveyor belt 8 travels with the rotation of the belt roller 6, the cleaning sheet 65, the protrusion 66, and the cleaning sheet 67 move. When the conveyor belt 8 continues to travel, the protruding portion 66 enters between the conveyor belt 8 and the belt roller 7. When the cleaning sheet 65 faces the pressing roller 5, the pressing roller lifting / lowering control unit 117 drives the cylinder 61 to move the pressing roller 5 upward, so that the cleaning sheet 65 pushed up by the protrusion 66 enters. Create a gap. Then, the distance that the pressing roller 5 moves upward (separates) from the conveying belt 8 is slightly smaller than the thickness of the protruding portion 66 in the direction facing the conveying belt 8, so that the cleaning sheet 65 moves to the pressing roller 5. Contact.

  At this time, the pressing roller rotation control unit 116 makes the rotation speed of the pressing roller 5 faster than the moving speed of the cleaning sheet 65. With the cleaning sheet 65 in contact with the pressing roller 5, the pressing roller 5 rotates faster than the traveling speed of the conveying belt 8, so that the cleaning sheet 65 cleans the pressing roller 5. In this way, the pressing roller 5 can be cleaned by the cleaning sheet 65 by providing a speed difference between the rotation speed of the pressing roller 5 and the moving speed of the cleaning sheet 65.

  Further, as shown in FIG. 7, when the conveyor belt 8 travels with the rotation of the belt roller 6, the cleaning sheet 65, the protrusion 66, and the cleaning sheet 67 move. When the transport belt 8 continues to travel, the cleaning sheet 65 faces the most upstream ink jet head 2 in the transport direction. Here, when the inkjet head 2 is after maintenance, the ejection surface 3a is often stained with ink. Accordingly, the head lifting control unit 114 drives the lifting mechanism 51 to move the four inkjet heads 2 to the cleaning position. Then, the cleaning sheet 65 comes into contact with the ejection surface 3 a of the inkjet head 2. The cleaning sheet 65 cleans the ejection surface 3 a of the inkjet head 2 by the conveyance belt 8 running while the cleaning sheet 65 is in contact with the inkjet head 2. Thus, the ejection surface 3a of the inkjet head 2 can be cleaned with a simple configuration using the movement of the cleaning sheet 65 by the transport belt 8.

  As described above, according to the paper transport device 15 according to the present embodiment, the cleaning sheet 65 is brought into contact with the image sensor 201 while the cleaning sheet 65 moving by the transport belt 8 faces the image sensor 201. The image sensor 201 is cleaned by moving it. Thereby, the user does not need to clean the image sensor 201 directly, and the image sensor 201 can be cleaned with a simple configuration using the movement of the cleaning sheet 65 by the conveyance belt 8. At this time, the cleaning sheet 65 which becomes a cleaning member can be easily configured simply by sticking a sheet-like felt on the outer peripheral surface of the conveyor belt 8.

  Further, even when the cleaning sheet 65 and the image sensor 201 are separated from each other, the cleaning sheet 65 is moved toward the image sensor 201 and brought into contact with a simple configuration using the movement of the protrusion 66 by the conveyance belt 8. Can be made. At this time, since the protruding portion 66 extends over the entire width of the conveying belt 8 in the main scanning direction, when the protruding portion 66 enters between the conveying belt 8 and the belt roller 6, the cleaning sheet. The cleaning sheet 65 can be brought into contact with the image sensor 201 with a uniform pressing force by moving the 65 toward the image sensor 201 without bending.

  Further, since the protruding portion 66 has the inclined portion 66b inclined in the direction away from the flat portion 66a along the transport direction, the cleaning sheet 65 can be smoothly moved toward the image sensor 201. Therefore, the cleaning sheet 65 can be brought into contact with the image sensor 201 smoothly. Further, since the protruding portion 66 has a flat portion 66a that is longer in the conveyance direction than the width of the image sensor 201 in the conveyance direction, the cleaning sheet 65 is separated from the image sensor 201 before the image sensor 201 is cleaned. The entire reading surface of the image sensor 201 can be cleaned.

  Further, the pressing force when the cleaning sheet 65 contacts the image sensor 201 because the thickness of the protrusion 66 in the direction facing the conveyance belt 8 is larger than the distance between the image sensor 201 and the cleaning sheet 65. The cleaning effect can be enhanced.

  Next, modified examples in which various modifications are added to the above-described embodiment will be described. However, about the thing which has the structure similar to this embodiment mentioned above, the same code | symbol is attached | subjected and the description is abbreviate | omitted suitably.

  In the embodiment described above, the protrusion 66 moves between the conveyor belt 8 and the belt roller 6 to move the protrusion 66 toward the image sensor 201. However, without providing the protrusion 66, The image sensor 201 may be moved up and down. For example, as shown in FIG. 8, the image sensor 201 may be supported by a support member 64 fixed to the printer main body via a cylinder 63. At this time, as shown in FIG. 9, the cylinder 63 moves up and down in the direction (up and down direction in FIG. 8) in which the image sensor 201 is opposed to the conveyor belt 8 under the control of the image sensor lifting control unit 118 (first lifting control unit). Move. That is, the cylinder 63, the support member 64, and the like constitute an elevating mechanism (first elevating mechanism) that moves the image sensor 201 in a direction facing the conveyor belt 8.

  In these configurations, when the cleaning sheet 65 faces the image sensor 201, the cylinder 63 is driven under the control of the image sensor lifting control unit 118, and the image sensor 201 is moved downward in FIG. 65 and the image sensor 201 come into contact with each other. Then, as the conveyance belt 8 travels, the cleaning sheet 65 cleans the reading surface of the image sensor 201. Accordingly, while the cleaning sheet 65 is opposed to the image sensor 201, the image sensor 201 is moved toward the cleaning sheet 65 so that the cleaning sheet 65 contacts the image sensor 201, and the cleaning sheet 65 is moved to the image sensor 201. The reading surface 201 can be cleaned.

  In the above-described embodiment, the protruding portion 66 is formed by thickening a part of the conveyor belt 8. However, the protrusion 66 has a predetermined thickness on a part of the conveyor belt 8 having a uniform thickness over the entire circumference. The protrusion may be formed by attaching an elastic member such as rubber. Further, a through hole is provided in the thickness direction in the region of the conveyance belt 8 between the protrusion and the cleaning sheet 65, the protrusion is formed of felt, and the protrusion and the cleaning sheet 65 are integrally formed. Also good. Thereby, the felt which forms a protrusion part can be used also as a cleaning sheet which cleans a pair of belt rollers 6 and 7. FIG.

  Further, in the above-described embodiment, the image sensor 201 is provided at a position facing the belt roller 6 with the conveyance belt 8 interposed therebetween, but the image sensor 201 may be provided at an arbitrary position such as a side surface of the frame 4. When the image sensor 201 is provided on the side surface of the frame 4, it is preferable to separately provide a roller for moving the cleaning sheet 65 upward by the protrusion 66 at a position facing the image sensor 201 across the conveyance belt 8. On the other hand, when the inkjet head 2 moves up and down by the lifting mechanism 51, the image sensor 201 also moves up and down.

  In the above-described embodiment, the inkjet head 2 is lowered by the lifting mechanism 51 and the discharge surface 3a is cleaned with the cleaning sheet 65. However, when the discharge surface 3a is not dirty, the lifting mechanism 51 It is not necessary to lower the inkjet head 2 and clean the ejection surface 3a. As a result, the cleaning sheet 65 moving by the transport belt 8 does not come into contact with the inkjet head 2, so that the life of the cleaning sheet 65 can be extended. Further, when the discharge surface 3a is not dirty and it is not necessary to clean the discharge surface 3a, it is possible to prevent the discharge surface 3a from becoming dirty by cleaning the discharge surface 3a with the cleaning sheet 65. it can.

  In addition, in the above-described embodiment, the cleaning sheet 65 is moved toward the image sensor 201 by the action of the protruding portion 66, but the cleaning sheet 65 is moved along with the traveling of the conveying belt 8 without providing the protruding portion 66. The thickness may be increased so as to contact the image sensor 201. At this time, since the ejection surface 3a of the inkjet head 2 and the reading surface of the image sensor 201 are on the same plane, in addition to the reading surface of the image sensor 201, the ejection surface 3a can be cleaned without the lifting mechanism 51. it can. At this time, when the ejection surface 3 a of the inkjet head 2 is not dirty, the inkjet head 2 may be raised by the lifting mechanism 51 and only the reading surface of the image sensor 201 may be cleaned with the cleaning sheet 65. As a result, the cleaning sheet 65 moving by the transport belt 8 does not come into contact with the inkjet head 2, so that the life of the cleaning sheet 65 can be extended. Further, when the discharge surface 3a is not dirty and it is not necessary to clean the discharge surface 3a, it is possible to prevent the discharge surface 3a from becoming dirty by cleaning the discharge surface 3a with the cleaning sheet 65. it can.

  The recording apparatus according to the present invention is not limited to the ink jet type, but can be applied to a thermal type, and is not limited to a line type, and can also be applied to a serial type in which a head reciprocates. Further, the present invention is not limited to a printer, and can be applied to a facsimile, a copier, and the like. The recording medium conveying apparatus according to the present invention may be installed in various recording apparatuses as described above.

1 is a schematic side view of an ink jet printer according to an embodiment of the present invention. 1 is a partial plan view of an inkjet printer 1. FIG. FIG. 3 is a sectional view taken along line III-III depicted in FIG. 2. FIG. 2 is a block diagram illustrating a control system of the ink jet printer depicted in FIG. 1. FIG. 3A shows the case where the image sensor is located at the imaging position, and FIG. 3B shows the case where the image sensor is located at the retracted position. FIG. 4 is an enlarged view of the vicinity of a belt roller to be driven, where (a) is a case where the cleaning sheet and the image sensor are not facing each other, and (b) is a case where the cleaning sheet and the image sensor are facing each other. . It is an enlarged view of the belt roller vicinity to follow. It is a typical side view of an inkjet printer when an inkjet head is located in a cleaning position. It is a typical side view of the inkjet printer which added the raising / lowering mechanism of the image sensor. It is a block diagram which shows the modification of the control system of an inkjet printer.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Inkjet printer 2 Inkjet head 5 Pressing roller (conveyance roller)
6, 7 Belt roller 8 Conveying belt 8a Outward surface 15 Paper conveying device 65 Cleaning sheet (first cleaning member)
66 Protrusion 67 Cleaning sheet (second cleaning member)
201 Image sensor 51 Elevating mechanism (second elevating mechanism)
101 Control Unit 114 Head Lift Control Unit (Second Lift Control Unit)
116 Pressing roller rotation control unit 117 Pressing roller lifting control unit 118 Image sensor lifting control unit (first lifting control unit)

Claims (12)

A transport mechanism having an annular transport surface for transporting the recording medium;
A reading unit that is disposed opposite to the conveyance surface of the conveyance mechanism and reads an image of the conveyance surface or a recording medium on the conveyance surface;
A first cleaning member disposed on the transport surface of the transport mechanism and configured to contact the reading unit and clean the reading unit;
The recording medium conveying apparatus, wherein the first cleaning member is in contact with the reading unit while the first cleaning member moved by the conveying mechanism is opposed to the reading unit.   One of the first cleaning member and the reading unit so that the first cleaning member is in contact with the reading unit while the first cleaning member moved by the transport mechanism is facing the reading unit. The recording medium conveying apparatus according to claim 1, further comprising a moving unit that relatively moves the recording medium. The transport mechanism is a belt type having a pair of rollers and a transport belt spanned between the pair of rollers,
The reading unit is opposed to either one of the pair of rollers with the conveyance belt interposed therebetween,
The moving means includes a protruding portion protruding from a region of the inner peripheral surface opposite to the region of the conveying surface on which the first cleaning member of the conveying belt is disposed;
When the protrusion is moved by the travel of the transport belt accompanying the rotation of the pair of rollers and the protrusion enters between the transport belt and the first roller, the first cleaning member is moved to the reading section. The recording medium transporting apparatus according to claim 2, wherein the recording unit is moved toward the surface of the recording medium to contact the reading unit to clean the reading unit.   The recording medium conveyance device according to claim 3, wherein the protruding portion extends over the entire width in a direction orthogonal to the conveyance direction of the reading unit.   A flat portion that is longer in the transport direction than the width of the reading unit in the transport direction; and an inclined portion that is inclined in a direction away from the flat portion along the transport direction across the flat portion. The recording medium carrying device according to claim 3, wherein the recording medium carrying device is provided.   6. The thickness according to claim 3, wherein a thickness of the protruding portion in a direction facing the conveying belt is larger than a distance between the reading unit and the first cleaning member. Recording medium transport device.   The recording medium conveying apparatus according to claim 3, further comprising a second cleaning member that is disposed on a surface of the protruding portion and that cleans the pair of rollers. The moving means includes a first elevating mechanism that elevates and lowers the reading unit in a direction facing the transport surface;
While the first cleaning member being moved by the transport mechanism is facing the reading unit, the first lifting and lowering is performed so that the reading unit is lowered to bring the first cleaning member and the reading unit into contact with each other. The recording medium conveying apparatus according to claim 2, further comprising first elevating control means for controlling drive of the mechanism.   The recording medium conveying apparatus according to claim 1, wherein the first cleaning member is made of a sheet-like felt. A transport roller that rotates while contacting the transport surface of the transport mechanism;
Rotation control means for controlling the rotation speed of the transport roller, and
The rotation control means gives a speed difference between the rotation speed of the transport roller and the moving speed of the first cleaning member while the first cleaning member is moved by the transport mechanism and is in contact with the transport roller. The recording medium conveying apparatus according to claim 1, wherein the recording medium conveying apparatus is a recording medium conveying apparatus. The recording medium carrying device according to any one of claims 1 to 10,
A discharge head for discharging the liquid, and a recording head disposed opposite to the transfer surface of the transfer mechanism,
The recording medium conveying apparatus, wherein the first cleaning member does not contact the recording head while the first cleaning member moving by the conveying mechanism is opposed to the recording head. The recording medium carrying device according to any one of claims 1 to 10,
A recording head in which a discharge surface for discharging a liquid is disposed opposite to the transport surface of the transport mechanism;
A second elevating mechanism for elevating the recording head in a direction opposite to the conveyance surface;
While the first cleaning member is moved by the transport mechanism and is opposed to the recording head, the recording head is lowered so that the first cleaning member and the ejection surface of the recording head come into contact with each other. And a second lifting control means for controlling the driving of the second lifting mechanism.

Images