Medium transport apparatus and recording apparatus

Abstract

There is a possibility that the transport performance of the rotating body that transports the medium deteriorates.SOLUTION: The medium transport device 9 includes the rotary body 172 that transports the media P by rotating about the shaft center of the rotary shaft 171, and the rotary brush 63 that includes the brush 632633 on the peripheral surface, is rotatable about the shaft center of the rotary shaft 171, and is movable in the approaching direction intersecting the rotary shaft 172, in which the rotary body 172 includes the plurality of teeth 71a on the peripheral surface, and the rotary brush 63 cleans the rotary body 172 by moving in the approaching direction while at least one of the rotary body and the rotary brush 63 is rotating.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present disclosure relates to a medium transport device and a recording device. [Background technology]

[0002] Patent Document 1 discloses a recording device including a recording head that discharges droplets onto a medium to record, and a medium transport path that includes a position facing the recording head. A roller is provided in the transport path to contact the recording surface of the medium onto which droplets have been discharged after recording by the recording head. The roller is disclosed to have a rotating shaft and multiple protrusions that protrude radially from the center of rotation of the rotating shaft and contact the recording surface. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-11347 Summary of the Invention [Problem to be solved by the invention]

[0004] There is a risk that paper dust generated from the medium may adhere to the roller in Patent Document 1. If the paper dust adhering to the roller is not sufficiently removed, there is a risk that the conveyance performance of the roller, such as the medium conveyance force, may decrease. [Means for solving the problem]

[0005] The media conveying device comprises a rotating body that conveys a medium by rotating around the axis of a first rotating shaft, and a rotating brush that has a brush on its peripheral surface, is rotatable around the axis of a second rotating shaft, and is movable in an intersecting direction that intersects with the axis of the first rotating shaft, wherein the rotating body has a plurality of protrusions on its peripheral surface, and the rotating brush cleans the rotating body by moving in the intersecting direction while at least one of the rotating body and the rotating brush is rotating.

[0006] The recording device comprises a recording unit that records on a medium, a rotating body that transports the medium by rotating around the axis of a first rotating shaft, and a rotating brush that has a brush on its circumferential surface and is rotatable around the axis of a second rotating shaft and movable in an intersecting direction that intersects with the axis of the first rotating shaft, the rotating body having multiple protrusions on its circumferential surface and forming a pair of resist rollers that corrects the inclination of the medium upstream of the recording unit in the transport direction of the medium, and the rotating brush cleans the rotating body by moving in the intersecting direction while at least one of the rotating body and the rotating brush is rotating. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is an external perspective view of a recording apparatus according to an embodiment. [Figure 2] FIG. 2 is a schematic side view showing a transport path of the medium transport device according to the embodiment. [Figure 3] FIG. 2 is a perspective view of a transport roller that constitutes the medium transport device according to the embodiment. [Figure 4] FIG. 2 is a partially enlarged perspective view of a transport roller that constitutes the medium transport device according to the embodiment. [Figure 5] FIG. 2 is a side view showing the periphery of a roller cleaning unit of the medium transport device according to the embodiment. [Figure 6] FIG. 4 is a side view showing a rotating brush that constitutes the roller cleaning unit according to the embodiment. [Figure 7] FIG. 4 is a perspective view showing a collection tray that constitutes the roller cleaning unit according to the embodiment. [Figure 8] 10A and 10B are side views showing a method for removing the collection tray according to the embodiment. [Figure 9] 10A and 10B are side views showing a method for removing the collection tray according to the embodiment. [Figure 10] 10A and 10B are side views showing a method for removing the collection tray according to the embodiment. [Figure 11] 10A and 10B are schematic diagrams showing another embodiment of the pump included in the medium conveying device according to the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0008] The present disclosure will be described below based on embodiments. In each drawing, the same components are denoted by the same reference numerals, and duplicate explanations may be omitted. When used in this specification, the terms "same," "identical," and "simultaneous" do not necessarily mean that something is completely the same.

[0009] For example, in this specification, when the terms "same," "identical," and "simultaneous" are used, it is intended to include cases where the same is true in consideration of measurement error. Also, for example, in this specification, when the terms "same," "identical," and "simultaneous" are used, it is intended to include cases where the same is true in consideration of manufacturing variations of components.

[0010] In this specification, the terms "same," "identical," and "simultaneous" are intended to include cases where the same is true to the extent that the functionality is not impaired. For example, "the dimensions of both are the same" means that, taking into account measurement errors and manufacturing variations of components, the difference in the dimensions of both is within ±5% of one dimension, and more preferably within ±3%.

[0011] In each figure, X, Y, and Z represent three spatial axes that are orthogonal to one another. In this specification, the directions along these axes are referred to as the X-axis direction, the Y-axis direction, and the Z-axis direction. When specifying a direction, the positive direction is indicated by "+" and the negative direction by "-", and both positive and negative signs are used to indicate the direction, with the direction indicated by the arrow in each figure being the + direction and the direction opposite the arrow being the - direction.

[0012] The Z-axis direction indicates the direction of gravity, the +Z direction indicates the vertically upward direction, and the -Z direction indicates the vertically downward direction. The plane containing the X-axis and Y-axis is described as the XY plane, the plane containing the X-axis and Z-axis as the XZ plane, and the plane containing the Y-axis and Z-axis as the YZ plane. The XY plane is a horizontal plane. The three spatial axes of X, Y, and Z, which are not limited to positive and negative directions, will be described as the X-axis, Y-axis, and Z-axis.

[0013] The X-axis direction is the horizontal direction along the installation surface, which is a horizontal plane on which the recording device 1 is installed. The X-axis direction is the width direction of the medium P transported by the medium transport device 9. The Y-axis direction is the horizontal direction along the installation surface on which the recording device 1 is installed. The Z-axis direction is the normal direction to the installation surface on which the recording device 1 is installed, and is the height direction of the recording device 1.

[0014] In the following explanation, the +Z direction may be referred to as "vertically upward" and the -Z direction may be referred to as "vertically downward." In the following explanation, in the medium conveying device 9 and the recording device 1, the end of the medium P in the conveying direction may be referred to as "downstream" and the side going back in the conveying direction may be referred to as "upstream." In the following explanation, the downstream end of the medium P in the conveying direction may be referred to as the "leading end," and the upstream end of the medium P in the conveying direction may be referred to as the "rear end." For convenience of illustration, the sizes of each component may differ from the actual sizes.

[0015] <Embodiment> As shown in FIG. 1, the recording device 1 includes a device main body 2A, a scanner unit 3 provided on the upper side of the device main body 2A, and extension units 2B and 2C provided on the lower side of the device main body 2A.

[0016] The scanner unit 3 reads an image recorded on a document. The expansion unit 2B includes a cassette 10B. The expansion unit 2C includes a cassette 10C. The cassettes 10B and 10C store a medium P such as recording paper.

[0017] Cassettes 10B and 10C are provided so that they can be removed in the -X direction. Expansion units 2B and 2C are optional units for increasing the number of media P that can be stored, and are optionally attached to device main body 2A.

[0018] The recording device 1 includes an operation unit 5 in the device body 2A. The operation unit 5 is provided so that an operator can operate it to instruct various operations to the recording device 1. As shown in Fig. 2, the recording device 1 includes a recording unit 8, a medium conveying device 9, and a control unit 90 in the device body 2A.

[0019] The medium transport device 9 transports the medium P along a transport path. The recording unit 8 performs recording by ejecting ink, which is an example of a liquid, onto the medium P transported by the medium transport device 9.

[0020] The recording unit 8 ejects ink from nozzles 82 that open to a nozzle surface 81. The recording unit 8 is provided at a position on the +Z direction side of a belt conveying unit 18 of a medium conveying device 9, which will be described later. The recording unit 8 is provided at a position where the nozzle surface 81 faces the outer peripheral surface of a conveying belt 18c of the belt conveying unit 18.

[0021] The recording unit 8 of this embodiment is a recording head, a so-called line head, that is provided on a nozzle surface 81 so that nozzles 82 that eject ink cover the entire width of the medium P. The recording unit 8 constitutes a recording unit 8 that can record across the entire width of the medium P without movement in the X-axis direction, which is the width direction of the medium P.

[0022] The medium transport device 9 includes a cassette 10A at the lowest position of the device main body 2A. The cassette 10A stores the medium P. The cassette 10A is provided so that it can be removed in the −X direction.

[0023] The medium transport device 9 includes a feeding unit 35 located on the +Y direction side of the center of the device main body 2A. The feeding unit 35 is provided so as to be openable and closable relative to the device main body 2A by rotating around a rotation fulcrum (not shown).

[0024] The feeding unit 35 has an openable cover 6. The openable cover 6 is configured to be swingable around a swing shaft 6a, and can be opened in the directions indicated by arrows e and f in Fig. 1. The openable cover 6v indicated by the two-dot chain line in Fig. 1 shows the openable cover 6 in the middle of opening or closing.

[0025] As shown in Fig. 2, the feeding unit 35 has a manual feed tray 41 inside the opening / closing cover 6. The manual feed tray 41 rotates around a swing shaft 41a and opens and closes together with the opening / closing cover 6. The manual feed tray 41 shown in Fig. 2 is in a stored position, and opens clockwise from the state in Fig. 2, allowing the medium P to be manually fed in a state facing diagonally upward.

[0026] The medium P set on the manual tray 41 is transported by the feed roller 15 and the separation roller 16 along the feed path S3 including the guide member 40 toward the registration roller pair 17 located downstream in the transport direction.

[0027] The -X side of the recording device 1 where the operation unit 5 is located is the front side of the device, and the +Y side where the opening / closing cover 6 is provided is the right side of the device. The feeding, transport, and discharge of the medium P in the recording device 1 are performed in the left-right direction of the device, which is the Y axis direction. Next, with reference to Figure 2, the transport path along which the medium P is transported and the members and mechanisms of the medium transport device 9 that make up the transport path will be described.

[0028] The medium conveying device 9 has feeding paths including a feeding path S1 from the cassette 10A, a feeding path S2 from the cassettes 10B and 10C (see FIG. 1), and a feeding path S3 from the manual feed tray 41. The feeding paths form part of the conveying path along which the medium P is conveyed.

[0029] The medium conveying device 9 is capable of face-up ejection (see face-up ejection trajectory T1), in which the medium P is ejected with the recording surface most recently recorded on by the recording unit 8 facing up, that is, the surface on the +Z direction side. The medium conveying device 9 is capable of face-down ejection (see face-down ejection trajectory T2), in which the medium P is ejected with the recording surface most recently recorded on by the recording unit 8 facing down, that is, the surface on the -Z direction side.

[0030] The medium transport device 9 includes a medium transport path including a recording transport path R1, a switchback path R2, a reversing path R3, a face-down discharge path R4, and a face-up discharge path R5. The medium transport path constitutes a part of the transport path along which the medium P is transported.

[0031] The medium transport device 9 includes a flap 33. The flap 33 is a path switching member that switches the transport path along which the medium P is transported. Driven by a drive source such as an electromagnetic solenoid (not shown), the flap 33 is displaced between a state shown by a solid line in FIG. 2 and a state shown by a flap 33v shown by a two-dot chain line, thereby switching the transport path along which the medium P is transported.

[0032] When the flap 33 is in the state shown by the solid line in Fig. 2, the medium P is guided to the face-down discharge path R4 and discharged face-down as shown by the face-down discharge trajectory T2. When the flap 33 is in the state of the flap 33v in Fig. 2, the medium P is guided to the face-up discharge path R5 and discharged face-up as shown by the face-up discharge trajectory T1.

[0033] The medium transport device 9 has a discharge section 34 located on the -Y side of the center of the device main body 2A. The discharge section 34 has a face-down discharge tray 4 located on the +Z side of the center of the device main body 2A. The face-down discharge tray 4 is a tray that receives the medium P that is discharged face-down.

[0034] The discharge section 34 includes a face-up discharge tray 7 at a position on the −Y direction side from the center of the device main body 2A. The face-up discharge tray 7 is a tray that receives the medium P that is discharged face-up.

[0035] The face-up discharge tray 7 can be in a stored state shown in Fig. 2 and an open state (not shown). The open state is a state in which the face-up discharge tray 7 is rotated counterclockwise around the rotation shaft 7a from the stored state, and the face-up discharge tray 7 can receive the medium P on its placement surface that is open in the -Y direction.

[0036] The control unit 90 may be provided in the recording device 1 or in the medium conveying device 9. The control unit 90 includes a CPU (Central Processing Unit), which is not shown. The control unit 90 includes a storage unit including a RAM (Random Access Memory) and a ROM (Read Only Memory). Various programs for controlling the recording device 1, including the medium conveying device 9, are stored in the storage unit.

[0037] The control unit 90 may include one or more processors that execute various processes according to a program, one or more dedicated hardware circuits such as an application specific integrated circuit (ASIC), or a combination thereof. The application specific integrated circuit (ASIC) executes at least some of the various processes.

[0038] The processor includes a CPU and memory such as RAM and ROM. The memory stores program code or instructions configured to cause the CPU to perform processes. Memory, i.e., computer-readable media, includes anything that can be accessed by a general-purpose or special-purpose computer.

[0039] The control unit 90 is electrically connected to each component, such as the scanner unit 3, the recording unit 8 of the device main body 2A, and the medium conveying device 9, and controls the operation of these components in an integrated manner. Note that the control unit 90 is conceptually shown in Figure 2, and is actually configured by a circuit board provided at a predetermined position within the device main body 2A. Below, the feed path to the pair of registration rollers 17 that configures the medium conveying device 9 will be described with further reference to Figure 2.

[0040] The medium conveying device 9 includes a cassette 10A that is detachably mounted on the device main body 2A and a hopper 11. The hopper 11 swings about an axis 11a, causing the medium P stored in the cassette 10A to approach or separate from a feed roller 12 that is driven to rotate by a motor (not shown).

[0041] The medium P fed from the cassette 10A by the feed roller 12 passes through the nip position of the separation roller pair 13, thereby preventing overlapping when conveyed. The medium P receives a feeding force from the conveyance roller pair 14 and reaches the registration roller pair 17.

[0042] Similarly, the expansion units 2B and 2C (see FIG. 1) located below the device main body 2A also include a feed roller 12 and a separation roller pair 13 that constitute the medium transport device 9. The medium P sent out from each cassette 10B, 10C receives a transport force from a transport roller pair 14 and reaches a registration roller pair 17.

[0043] The following describes the medium transport path downstream of the registration roller pair 17 that constitutes the medium transport device 9. Here, the medium transport path downstream of the registration roller pair 17 is described, assuming that the medium P is discharged face-down via the face-down discharge path R4. First, the rollers provided on each medium transport path are described.

[0044] The medium conveying device 9 includes a pair of registration rollers 17, a belt conveying unit 18, pairs of conveying rollers 20 to 29, and a cleaning unit 60.

[0045] The pair of registration rollers 17 corrects the inclination of the medium P being transported from upstream. The leading edge of the medium P is abutted against the pair of registration rollers 17, thereby correcting the inclination of the medium P. The pair of registration rollers 17 includes a drive roller 17a and a driven roller 17b. The medium P, whose inclination has been corrected, is transported downstream by the pair of registration rollers 17.

[0046] The configurations of the pair of registration rollers 17 and the cleaning unit 60 will be described later. A belt conveying unit 18 is provided downstream of the pair of registration rollers 17. The belt conveying unit 18 is provided at a position vertically below the nozzle surface 81 of the recording unit 8.

[0047] The belt conveying unit 18 includes pulleys 18a and 18b and a conveying belt 18c. The conveying belt 18c is an endless conveying belt that is wound around the upstream pulley 18a and the downstream pulley 18b. The outer circumferential surface of the conveying belt 18c, which is located between the pulleys 18a and 18b, is aligned with the XY plane.

[0048] The pulley 18a is rotated by a drive motor (not shown). When the pulley 18a is rotated, the conveyor belt 18c rotates counterclockwise when viewed from the -X direction, and the medium P attracted to the conveyor belt 18c is conveyed in the -Y direction.

[0049] The medium P is adsorbed to the outer peripheral surface of the conveyor belt 18c and conveyed to a position facing the recording unit 8. The method for adsorbing the medium P to the conveyor belt 18c can be an air suction method, an electrostatic adsorption method, or the like. The Y-axis direction is the conveying direction when the medium P is conveyed by the conveyor belt 18c of the belt conveyor unit 18.

[0050] Belt conveying unit 18 includes driven roller 19a located vertically above pulley 18a with conveying belt 18c interposed therebetween, and driven roller 19b located vertically above pulley 18b with conveying belt 18c interposed therebetween.

[0051] A plurality of driven rollers 19a are provided at appropriate intervals on a rotation shaft whose axis direction is the X-axis direction. Similarly, a plurality of driven rollers 19b are provided at appropriate intervals on a rotation shaft whose axis direction is the X-axis direction. Medium P transported by conveyor belt 18c is pressed against conveyor belt 18c by driven rollers 19a and 19b.

[0052] One roller constituting each of the transport roller pairs 20 to 28 is designated by the symbol F, and the other roller is designated by the symbol G. The roller F is a drive roller driven by a motor (not shown). The rollers F are, for example, multiple rubber rollers provided at appropriate intervals in the X-axis direction, which is the width direction of the medium P.

[0053] Roller G is a driven roller that is biased toward roller F by a biasing member such as a spring (not shown) and thereby rotates in contact with medium P. Roller G is provided as a pair with roller F with an appropriate gap in the X-axis direction. Roller G is, for example, a jagged roller with multiple teeth on its outer periphery.

[0054] Roller G prevents ink from leaving or transferring onto the already recorded surface by making point contact with the recording surface of medium P. In addition to constituting each transport roller pair, roller G is also provided at an appropriate position on the medium transport path, particularly on the side that comes into contact with the already recorded surface.

[0055] The pair of conveying rollers 29 includes a drive roller 29a that is driven to rotate, and a driven roller 29b that is urged toward the drive roller 29a so as to be rotatable in response to the drive roller 29a. The driven roller 29b is a resin roller with a smooth outer circumferential surface.

[0056] Between the rollers described above, the medium P is guided by upper and lower guide members. In order to avoid cluttering the illustration, the guide members are not labeled in Figure 2, but the thick lines connecting the rollers indicate the guide members.

[0057] The recording transport path R1 passes vertically below the nozzle surface 81 of the recording unit 8 and extends upstream and downstream of the recording unit 8. On the recording transport path R1, the medium P receives a feeding force from a pair of registration rollers 17 and a belt transport unit 18, which will be described later.

[0058] The switchback path R2 is a transport path that connects to the recording transport path R1. The switchback path R2 is a path that transports the medium P that has passed vertically below the recording unit 8 in the -Y direction, and then switches back to transport the medium P in the +Y direction, which is the opposite direction to the feeding direction.

[0059] The switchback path R2 is located on the inside of a curve with respect to a face-down discharge path R4, which will be described later. In the switchback path R2, the medium P receives a feeding force from the transport roller pair 26.

[0060] The reverse path R3 is a transport path that connects to the switchback path R2. The reverse path R3 reverses the medium P transported in the +Y direction from the switchback path R2 by detouring vertically above the recording unit 8.

[0061] As a result, the reversing path R3 merges the medium P with the recording transport path R1 at a position on the recording transport path R1 upstream of the recording unit 8, which in this embodiment is a position upstream of the registration roller pair 17. In the reversing path R3, the medium P receives a feeding force from the transport roller pairs 27, 28, and 29.

[0062] The face-down discharge path R4 is a transport path that connects to the recording transport path R1. The face-down discharge path R4 inverts and discharges the medium P that has passed vertically below the recording unit 8 by curving the medium P so that the surface facing the recording unit 8 is inward. In the face-down discharge path R4, the medium P receives a feeding force from transport roller pairs 20, 21, 22, 23, 24, and 25.

[0063] The medium transport device 9 includes a first flap 31 and a second flap 32 at the connection points of the transport paths as path switching members that switch the transport paths. The first flap 31 is capable of swinging around a swing fulcrum 31a by receiving a driving force from a driving source such as an electromagnetic solenoid (not shown).

[0064] The second flap 32 is provided so as to be engageable with the first flap 31 via an engagement portion (not shown). The second flap 32 swings around a swing fulcrum 32a in response to the swing of the first flap 31. The first flap 31 and the second flap 32 set the next transport path along which the medium P is transported.

[0065] Next, a description will be given of the configuration of the registration roller pair 17 provided in the medium conveying device 9. As shown in Fig. 2, the drive roller 17a constituting the registration roller pair 17 is rotated by driving the drive motor of the roller drive unit 17M (see Fig. 8).

[0066] The driven roller 17b constituting the registration roller pair 17 is biased toward the drive roller 17a by a biasing member such as a spring (not shown) so as to be rotatable while sandwiching the medium P between the driven roller 17b and the drive roller 17a. The driven roller 17b is, for example, a resin roller with a smooth outer circumferential surface.

[0067] 3, the drive roller 17a has a rotation shaft 171 extending in the X-axis direction and a plurality of rotors 172 spaced apart in the X-axis direction. A contact portion 175 that comes into contact with the medium P is formed on the outer circumferential surface of the cylindrical rotor 172.

[0068] 4, the rotor 172 of this embodiment is formed by alternately stacking a plurality of disks 70 and toothed plates 71 along a rotation axis 171. The disks 70 are made of, for example, resin and have an arc-shaped outer periphery. The toothed plates 71 are made of, for example, a thin metal plate member and have a plurality of teeth 71a on the outer periphery of the disk shape.

[0069] This forms a contact portion 175 in which multiple teeth 71a protrude from the circumferential surface of the rotor 172. A silicone coating layer (not shown) such as polysilsesquioxane is provided on the contact portion 175 so as to cover each of the teeth 71a. There is no particular limit to the number of rotors 172 attached to the rotating shaft 171.

[0070] The medium conveying device 9 and the recording device 1 of this embodiment include a toothed plate 71 attached to a rotating shaft 171. The toothed plate 71 has a plurality of teeth 71a that protrude from the circumferential surface of the toothed plate 71 in the radial direction of the rotating shaft 171.

[0071] When the drive motor of roller drive unit 17M is driven to rotate rotation shaft 171, rotating body 172 rotates around the axis of rotation shaft 171. Contact portion 175 of rotating body 172 is provided with a plurality of teeth 71a protruding from the circumferential surface of rotating body 172. Tooth portions 71a of toothed plate 71 are an example of protrusions provided on the circumferential surface of rotating body 172. Rotating shaft 171 is an example of a first rotating shaft.

[0072] As a result, the medium conveying device 9 and recording device 1 of this embodiment can rotate the rotating body 172 around the axis of the rotating shaft 171, causing the tooth portion 71a of the toothed plate 71 to come into contact with the medium P, thereby conveying the medium P with high precision using strong frictional force.

[0073] The tooth portions 71a of the toothed plate 71 are in point contact with the recording surface of the medium P. Therefore, compared to a configuration in which the tooth portions 71a are in surface contact with the recording surface of the medium P, the area of ​​contact with the recording surface is smaller, and it is possible to reduce adhesion of ink ejected onto the recording surface to the drive roller 17a.

[0074] The silicone coating layer, such as polysilsesquioxane, is provided to cover at least the tooth portions 71a, thereby preventing ink ejected onto the recording surface of the medium P from adhering to the tooth portions 71a for a long period of time.

[0075] The drive roller 17a of this embodiment has multiple toothed plates 71 arranged on the rotation shaft 171 along the X-axis direction, which allows for particularly strong frictional force to transport the medium P with high precision. Note that the drive roller 29a in the medium transport device 9 and recording device 1 of this embodiment may have a configuration similar to that of the drive roller 17a of this embodiment.

[0076] Next, the configuration of the cleaning unit 60 will be described with reference to Figures 5 to 10. For ease of explanation, Figures 8 to 10 omit illustration of a removal unit 64 and a suction unit 69, which will be described later.

[0077] 5 and 8, the cleaning unit 60 is provided below the drive roller 17a on the −Z direction side. The cleaning unit 60 includes a brush unit 61, a brush drive unit 61M, a removal unit 64, a receiving unit 65, a blowing unit 67, and a suction unit 69.

[0078] The brush unit 61 has a rotary shaft 62 and a rotary brush 63. The rotary shaft 62 is provided at a distance from the rotary shaft 171 (see FIG. 3) of the drive roller 17a. The rotary shaft 62 is provided below the rotary shaft 171 on the -Z direction side. The rotary shaft 62 is provided upstream of the rotary shaft 171 on the +Y direction side.

[0079] As a result, the rotating brush 63 is located on the −Z direction side below the rotating body 172. The rotating brush 63 is located on the +Y direction side upstream of the rotating body 172.

[0080] The axis of the rotation shaft 62 extends in the X-axis direction. In this embodiment, the rotation shaft 62 is provided on the frame 2F of the medium conveyance device 9 via a brush driving unit 61M (see FIG. 8). The rotation shaft 62 rotates around its axis by driving the brush driving unit 61M.

[0081] The rotating shaft 62 moves in the X-axis direction by driving the brush driving unit 61M. By driving the brush driving unit 61M, the rotating shaft 62 moves to a cleaning position indicated by a solid line in Fig. 5 and a retracted position indicated by a two-dot chain line in Fig. 5.

[0082] The cleaning position is a position where the rotating brush 63 cleans the rotating body 172 of the drive roller 17a, and is a position where the rotating brush 63 contacts the rotating body 172. The separated position is a position where the rotating brush 63 is separated from the rotating body 172.

[0083] The rotating shaft 62 moves from the remote position to the cleaning position along the approach direction indicated by the dashed arrow in Fig. 5. The approach direction is a direction in which the rotating shaft 62 approaches the axis of the rotating shaft 171. The approach direction is an example of an intersecting direction that intersects with the axis of the rotating shaft 171.

[0084] The rotating brush 63 has a base 631 and brushes 632 and 633. The base 631 has a cylindrical shape. The base 631 is fixed to the rotation shaft 62, so that the rotating brush 63 rotates around the axis of the rotation shaft 62 as the rotation shaft 62 rotates. The rotation shaft 62 is an example of a second rotation shaft. As the rotation shaft 62 moves, the position of the rotating brush 63 relative to the rotor 172 of the drive roller 17a changes. For example, the rotating brush 63 can move in the X-axis direction along the rotation shaft 171 by moving the rotation shaft 62 in the X-axis direction.

[0085] The rotating brush 63 has brushes 632 and 633 on the circumferential surface of a base 631. The bristles of the brushes 632 and 633 extend in a direction away from the circumferential surface of the base 631. As shown in FIGS. 6 and 8, in this embodiment, the bristles of the brushes 632 and 633 extend in a direction inclined with respect to the normal direction to the circumferential surface of the base 631.

[0086] As a result, the bristles of the brushes 632 and 633 extend in a direction inclined relative to the axis of the rotary shaft 62 and the axis of the rotary shaft 171. Therefore, the brushes 632 and 633 are provided on the circumferential surface of the base 631 so that the extending direction of the bristles is inclined relative to the extending direction of the tooth portions 71a.

[0087] The dimensions of the base 631 and the brushes 632, 633 in the X-axis direction are set to dimensions that allow the brushes 632, 633 to simultaneously contact the rotating bodies 172 of the drive roller 17a when in the cleaning position. In this embodiment, the dimensions of the base 631 and the brushes 632, 633 in the X-axis direction are set to be larger than the dimension between the outer ends of the outer rotating bodies 172.

[0088] In this embodiment, multiple bristles of brush 632 are provided spirally and continuously around the circumferential surface of base 631. In this embodiment, multiple bristles of brush 633 are provided spirally and continuously around the circumferential surface of base 631. In this embodiment, when brush unit 61 is viewed from the normal direction to the axis of rotation shaft 62, the bristles of brush 632 and the bristles of brush 633 are alternately arranged along the axis of rotation shaft 62.

[0089] The bristles of brush 632 and brush 633 are different in length. In this embodiment, the bristles of brush 633 are set to be shorter than the bristles of brush 632. Brush 632 is an example of a first brush, and brush 633 is an example of a second brush.

[0090] The bristles of the brushes 632, 633 are preferably made of a material that is harder than medium dust such as paper dust that adheres to the medium P, but softer than the teeth 71a of the toothed plate 71. In this case, the bristles of the brushes 632, 633 may be made of, for example, polyester resin or polybutylene terephthalate resin.

[0091] Furthermore, a material that does not easily generate static electricity is desirable for the bristles that make up the brushes 632 and 633. In this case, the bristles that make up the brushes 632 and 633 can be made of a resin material that has been made more conductive by mixing carbon particles into polyester resin, polybutylene terephthalate resin, or the like.

[0092] The remover 64 comes into contact with the brushes 632, 633 of the rotating brush 63 to remove dust such as medium powder adhering to the brushes 632, 633 from the brushes 632, 633. The remover 64 is a thin plate member whose both surfaces extend in the X-axis direction and the Z-axis direction.

[0093] The bristles of the removal portion 64 may be made of, for example, polyester resin. The removal portion 64 may be grounded. In this case, the bristles of the removal portion 64 may be made of, for example, polyester resin mixed with carbon particles to enhance conductivity.

[0094] The removal unit 64 is provided at a position where it can come into contact with the brushes 632, 633 of the rotating brush 63 when the rotating brush 63 is in either the cleaning position or the remote position. In the embodiment shown in Fig. 5, the removal unit 64 is provided upstream in the +Y direction of the rotating shaft 62 and below in the -Z direction so that the upper end of the removal unit 64 can come into contact with the brushes 632, 633 when the rotating brush 63 is in the remote position.

[0095] As a result, the remover 64 is located in the −Z direction below the rotating body 172. The remover 64 is located in the +Y direction upstream of the rotating body 172.

[0096] When the removal unit 64 comes into contact with the brushes 632, 633 of the rotating rotary brush 63, the dust removed from the brushes 632, 633 is collected in a receiving unit 65 provided on the -Z direction side below the removal unit 64. In the embodiment shown in Fig. 5, the removal unit 64 is attached to the frame 2F. Therefore, the lower end of the removal unit 64 is located in the +Z direction from the upper end of the receiving unit 65.

[0097] 5, the receiving portion 65 is provided at a position on the -Z direction side of the pair of registration rollers 17, the brush unit 61, and the removal unit 64. The receiving portion 65 is detachably held on the frame 2F. When the receiving portion 65 is attached to the frame 2F, it opens in the +Z direction so that dust from above can be collected.

[0098] In the embodiment shown in FIG. 5, when the receiving portion 65 is attached or detached in the X-axis direction, which is the horizontal direction relative to the apparatus main body 2A, the receiving portion 65 does not come into contact with the rotating brush 63 and the removing portion 64.

[0099] 8, the upper end of the receiving portion 65 in the attached position may be located higher than the lower end of the brush portion 61. In this case, when the receiving portion 65 is attached to or detached from the device main body 2A in the X-axis direction, there is a risk that the receiving portion 65 may be attached or detached in a state where the receiving portion 65 is in contact with the rotating brush 63.

[0100] For this reason, the receiving portion 65 of the embodiment shown in Fig. 8 has inclined surfaces 651, 652 as shown in Fig. 7 and Fig. 8. The frame 2F is provided with guides 2F1, 2F2 that come into contact with the inclined surfaces 651, 652 to guide the movement of the receiving portion 65 when it is attached to or detached from the frame 2F as shown in Fig. 8.

[0101] When removing the receiving portion 65 from the frame 2F, the screw SC1 that is fixed to the frame 2F through the screw hole 653 of the receiving portion 65 is removed. When the receiving portion 65 is pulled out from the device main body 2A, as shown in Fig. 9, the inclined surfaces 651, 652 are guided by the guides 2F1, 2F2, and the receiving portion 65 moves diagonally downward while maintaining a horizontal posture.

[0102] As shown in FIG. 10, when the receiving portion 65 is further pulled out, the receiving portion 65 moves further diagonally downward, and the upper end of the receiving portion 65 is positioned below the lower end of the brush portion 61 , that is, below the rotating brush 63 .

[0103] Furthermore, when the receiving portion 65 is pulled out, the receiving portion 65 moves horizontally and is removed from the device main body 2A without contacting the rotating brush 63. In the embodiment shown in FIG. 8, the removing portion 64 may be provided on the receiving portion 65. In this case, the lower end of the removing portion 64 may be in contact with the inner bottom of the receiving portion 65.

[0104] The blowing unit 67 blows air onto the rotating brush 63 to remove dust such as medium powder from the rotating brush 63. As shown in Fig. 5, the blowing unit 67 has an outlet 66 for blowing air onto the rotating brush 63. The outlet 66 of the blowing unit 67 is located downstream of the rotating brush 63 in the -Y direction, and opens toward the rotating brush 63 located on the +Y direction side.

[0105] The blowing unit 67 operates a pump (not shown) to blow air from the air outlet 66 as indicated by the white arrow. The operation of the pump is performed by the control unit 90 driving and controlling an actuator such as a motor or solenoid (not shown).

[0106] The pump of the spraying section 67 may be a centrifugal pump, which is a non-positive displacement pump, a diaphragm pump, a plunger pump, a tube pump, or the like, which is a positive displacement pump.

[0107] The suction unit 69 sucks air to remove dust such as medium powder from the rotating brush 63. The suction unit 69 has a suction port 68 for sucking in air. The suction port 68 of the suction unit 69 is located on the +Y direction side, upstream of the rotating brush 63, and opens toward the rotating brush 63 located on the -Y direction side.

[0108] Suction unit 69 operates a pump (not shown) to suck air from suction port 68, as indicated by the outlined arrow. The operation of the pump is performed by control unit 90 driving an actuator such as a motor or solenoid (not shown).

[0109] As with the pump of the spraying section 67, the pump of the suction section 69 may be a centrifugal pump, which is a non-positive displacement pump, a diaphragm pump, a plunger pump, a tube pump, or the like, which is a positive displacement pump.

[0110] 11 is used as the pump of the blowing unit 67, the suction unit 69 does not need to include a pump. In this case, the blowing unit 67 may include a pump chamber 671, a plunger 672, a compression coil spring 673, a valve chamber 674, an intake-side valve 675, an exhaust-side valve 676, and a dust collection container 677.

[0111] When the actuator is driven, a plunger 672 reciprocates in the direction indicated by the arrow, thereby changing the volume of the pump chamber 671. The pump chamber 671 communicates with a valve chamber 674.

[0112] Compression coil spring 673 pushes plunger 672 in a direction that increases the volume of pump chamber 671. If plunger 672 moves in a direction that increases the volume of pump chamber 671 by driving the actuator, compression coil spring 673 may be omitted.

[0113] The valve chamber 674 has a communication port that communicates with the pump chamber 671. The valve chamber 674 has an intake-side communication port that communicates with an intake-side flow path that has suction port 68 as a suction section 69 as an intake port. The valve chamber 674 has an exhaust-side communication port that communicates with an exhaust-side flow path that has blow-out port 66 as an exhaust port.

[0114] An intake-side valve 675 is provided at the intake-side communication port of the valve chamber 674. The intake-side valve 675 is a one-way valve that opens the intake-side communication port when the volume of the pump chamber 671 increases, and closes the intake-side communication port when the volume of the pump chamber 671 decreases, as shown by the arrow.

[0115] An exhaust-side valve 676 is provided at the exhaust-side communication port of the valve chamber 674. The exhaust-side valve 676 is a one-way valve that closes the exhaust-side communication port when the volume of the pump chamber 671 increases, and opens the exhaust-side communication port when the volume of the pump chamber 671 decreases, as shown by the arrow. The exhaust-side valve 676 may have a characteristic of opening when the inside of the valve chamber 674 is pressurized to a predetermined pressure.

[0116] Dust collection container 677 is detachably provided midway along the intake-side flow path. Dust collection container 677 collects dust such as medium powder that is sucked in together with air through suction port 68. Dust collection container 677 is preferably provided at a position below the intake-side flow path.

[0117] When the actuator is driven to move the plunger 672 in a direction that increases the volume of the pump chamber 671, the exhaust-side valve 676 closes the exhaust-side communication port and the intake-side valve 675 opens the intake-side communication port. As a result, as shown by the white arrow, air sucked in from the suction port 68 flows into the valve chamber 674 via the intake-side flow path and the intake-side communication port.

[0118] When the actuator is driven to move the plunger 672 in the direction that decreases the volume of the pump chamber 671, the intake-side valve 675 closes the intake-side communication port, and the exhaust-side valve 676 opens the exhaust-side communication port. As a result, the air in the valve chamber 674 passes through the exhaust-side communication port and the exhaust-side flow path and is blown out from the outlet 66 as indicated by the white arrow.

[0119] Next, the operation of the cleaning unit 60 and the pair of registration rollers 17 when the medium transport device 9 and the recording device 1 clean the rotating body 172 will be described.

[0120] The control unit 90 controls the brush driving unit 61M and the roller driving unit 17M to clean the rotating body 172 at predetermined timings. The predetermined timings include, for example, when the medium transport device 9 and the recording device 1 are started up, before and after a series of recording operations on the medium P, when specified by the user, when the recording unit 8 is cleaned, and when the set number of recording surfaces has been recorded.

[0121] In this embodiment, cleaning of the rotating body 172 is performed at a predetermined timing when the registration roller pair 17 is not transporting the medium P. In other words, cleaning of the rotating body 172 is performed at a predetermined timing when the rotating body 172 of the drive roller 17a is not transporting the medium P.

[0122] When cleaning the rotating body 172 during cleaning of the recording unit 8, cleaning of the rotating body 172 is carried out before cleaning of the recording unit 8.

[0123] When counting the number of recorded surfaces, for example, double-sided recording of medium P may be counted as 1.5-surface recording, taking into consideration that less medium dust adheres to the second surface when recording is performed on the medium P. Alternatively, when a medium P on which recording with a large amount of ink ejected onto the medium P has been performed passes, more ink adheres to the rotating body 172, so for example, single-surface recording may be counted as 1.5-surface recording.

[0124] Cleaning of the rotating body 172 is performed by moving the rotating brush 63 from the separated position to the cleaning position along the approach direction while at least one of the rotating body 172 and the rotating brush 63 is rotating.

[0125] In the cleaning position, the brushes 632 and 633 of the rotating brush 63 contact the tooth portions 71a of the rotor 172. More specifically, the brush 632 contacts the base side of the tooth portions 71a, and the brush 633 contacts the tip side of the tooth portions 71a.

[0126] During cleaning of the rotating body 172, the control unit 90 may control the brush driving unit 61M to move the rotating brush 63 between a position on the approach direction side of the cleaning position and a position on the opposite side of the approach direction.

[0127] 5, when cleaning the rotating body 172, the registration roller pair 17 and the rotating brush 63 rotate in the directions indicated by the arrows. That is, when viewed from the -X direction, the rotating body 172 of the drive roller 17a rotates counterclockwise. When viewed from the -X direction, the rotating brush 63 rotates clockwise.

[0128] When the brushes 632 and 633 come into contact with the toothed portion 71a in cleaning the rotating body 172, the pair of registration rollers 17 and the rotating brush 63 may be rotating in a direction different from that in the embodiment shown in FIG.

[0129] For example, when the brushes 632 and 633 come into contact with the tooth portion 71a, the rotor 172 of the drive roller 17a may be rotating counterclockwise when viewed from the −X direction side, and the rotary brush 63 may be rotating counterclockwise.

[0130] Alternatively, when the brushes 632 and 633 come into contact with the tooth portion 71a, the rotor 172 of the drive roller 17a may be rotating clockwise when viewed from the −X direction side, and the rotary brush 63 may be rotating clockwise.

[0131] Alternatively, when the brushes 632 and 633 come into contact with the tooth portion 71a, the rotor 172 of the drive roller 17a may be rotating clockwise and the rotary brush 63 may be rotating counterclockwise when viewed from the -X direction side.

[0132] Furthermore, in cleaning the rotating body 172, the control unit 90 may change the rotation direction of the rotating brush 63 at the cleaning position by controlling the brush driving unit 61M. The change in the rotation direction of the rotating brush 63 at the cleaning position may be performed during one cleaning of the rotating body 172.

[0133] The rotation direction of the rotating brush 63 for cleaning the rotating body 172 may be changed when a set number of recording surfaces have been recorded, or when high-speed transport of the medium P has been performed. Alternatively, the rotation direction of the rotating brush 63 for cleaning the rotating body 172 may be changed when the rotating brush 63 has been rotating in the same rotation direction for a set period of time.

[0134] When the brushes 632 and 633 come into contact with the contact portion 175 during cleaning of the rotating body 172, the angular velocities of rotation of the pair of resist rollers 17 and the rotating brush 63 do not need to be the same.

[0135] For example, when viewed from the −X direction side, the rotor 172 of the drive roller 17a rotates counterclockwise, and the rotary brush 63 also rotates counterclockwise. In this case, the angular velocity of the rotation of the rotary brush 63 may be smaller than the angular velocity of the rotation of the rotor 172. Alternatively, the rotary brush 63 may not rotate when cleaning the rotor 172.

[0136] Furthermore, when cleaning the rotating body 172, the control unit 90 may control the brush driving unit 61M to move the rotating brush 63, which is at the cleaning position, in the X-axis direction.

[0137] The control unit 90 controls the brush driving unit 61M to move the rotating brush 63, which has cleaned the rotor 172 at the cleaning position, to the separated position while still rotating. At the separated position, the brushes 632, 633 of the rotating rotating brush 63 come into contact with the removal unit 64.

[0138] As a result, the ink, medium powder, and other dust particles collected by the brushes 632, 633 from the rotating body 172 are removed from the brushes 632, 633. The ink, medium powder, and other dust particles removed from the brushes 632, 633 are collected in the receiving portion 65.

[0139] The control unit 90 may control at least one of the actuators of the spraying unit 67 and the suction unit 69 to remove dust such as ink and medium powder collected by the brushes 632, 633 from the rotating body 172 by an air flow.

[0140] For example, when the rotating brush 63 is in either the cleaning position or the remote position, or when the rotating brush 63 is moving between the cleaning position and the remote position, the blowing unit 67 and the suction unit 69 operate.

[0141] As a result, dust such as ink and medium powder adhering to the brushes 632, 633 is removed from the brushes 632, 633 by air being blown from the air outlet 66 and air being sucked from the suction port 68. The ink, medium powder, and other dust removed from the brushes 632, 633 are collected in the receiver 65.

[0142] Alternatively, when the rotating brush 63 is in the cleaning position, the suction unit 69 may operate to suck air through the suction port 68. This also removes dust such as ink and medium powder adhering to the brushes 632 and 633 from the brushes 632 and 633.

[0143] Alternatively, when the rotating brush 63 is in the remote position, the blowing unit 67 may operate to blow air from the air outlet 66 toward the rotating brush 63. This also removes dust such as ink and medium powder adhering to the brushes 632, 633 from the brushes 632, 633.

[0144] As described above, the medium conveying device 9 and the recording device 1 according to the embodiment can provide the following effects.

[0145] The medium conveying device 9 includes a rotating body 172 that conveys the medium P by rotating about the axis of a rotating shaft 171. The medium conveying device 9 includes a rotating brush 63 that has brushes 632, 633 on its circumferential surface and is rotatable about the axis of the rotating shaft 62 and movable in an approaching direction that intersects with the axis of the rotating shaft 171. The rotating body 172 has a plurality of teeth 71a on its circumferential surface. The rotating brush 63 cleans the rotating body 172 by moving in the approaching direction while at least one of the rotating body 172 and the rotating brush 63 is rotating.

[0146] According to this, by moving the rotating brush 63 in the approaching direction, the tooth portion 71a can be cleaned, including its side surface. This prevents a decrease in the conveyance performance of the medium P due to the tooth portion 71a of the rotating body 172 and a decrease in the function of the rotating body 172. Therefore, a medium conveying device 9 that can convey the medium P with high accuracy can be realized.

[0147] The brushes 632 and 633 are formed so as to be inclined with respect to the tooth portion 71a, so that the bristles of the brushes 632 and 633 can easily come into contact with the tooth portion 71a, thereby enabling the tooth portion 71a to be cleaned efficiently.

[0148] The brushes 632 and 633 are formed in a spiral shape, which allows the density of the bristles that make up the brushes 632 and 633 on the circumferential surface of the rotating brush 63 to be increased.

[0149] The rotating brush 63 has a brush 632 and a brush 633 whose bristles are shorter than those of the brush 632 , and the brushes 632 and 633 are alternately arranged along the axis of the rotating shaft 62 .

[0150] This reduces the moving distance of the rotating brush 63 when cleaning the rotor 172 compared to when the rotating brush 63 having only the brush 632 is moved in the approaching direction. This makes it easier to reduce the size of the medium conveying device 9.

[0151] The rotating brush 63 is movable in the direction along the X-axis. This allows the brushes 632, 633 of the rotating brush 63 to clean the rotating body 172 while moving in the X-axis direction. This allows the rotating body 172 to be cleaned efficiently.

[0152] Cleaning of the rotating body 172 is performed when the rotating body 172 is not transporting the medium P. This can prevent a decrease in the performance of the rotating body 172 in transporting the medium P due to cleaning of the rotating body 172. This can also prevent an increase in maximum power consumption due to operating the cleaning unit 60.

[0153] Cleaning of the rotating body 172 is performed by moving the rotating brush 63 in the approaching direction while the rotating body 172 and the rotating brush 63 are rotating. This allows the rotating body 172 to be cleaned efficiently.

[0154] The rotating brush 63 is rotatable in the same direction as the rotation direction of the rotor 172. As a result, the bristles of the rotating brush 63 move toward and come into contact with the teeth 71a of the rotor 172, which move toward the bristles of the rotating brush 63. This allows the rotor 172 to be cleaned efficiently.

[0155] The rotating brush 63 is rotatable in the direction opposite to the direction of rotation of the rotor 172. This allows the rotating brush 63 to rotate in the same direction as the rotor 172 and in the opposite direction, so that the bristles of the rotating brush 63 can come into contact with the toothed portion 71a of the rotor 172 from different directions. This allows the toothed portion 71a of the rotor 172 to be cleaned efficiently.

[0156] The medium transport device 9 further includes a removal unit 64 that cleans the rotating brush 63. The rotating brush 63 and the removal unit 64 are located upstream of the rotating body 172 in the transport direction of the medium P. This cleans the rotating brush 63, thereby maintaining the ability of the rotating brush 63 to clean the rotating body 172.

[0157] The medium conveying device 9 further includes a blowing unit 67 that blows air onto the rotating brush 63. The rotating brush 63 is located upstream of the rotor 172 in the conveying direction of the medium P. The blowing unit 67 is located downstream of the rotating brush 63 in the conveying direction of the medium P.

[0158] This allows the rotating brush 63 to maintain its ability to clean the rotating body 172 while suppressing dust such as medium powder from moving downstream in the conveying direction due to the air being blown onto the rotating brush 63.

[0159] The medium conveying device 9 further includes a suction unit 69 that sucks in air. The rotating brush 63 and the suction unit 69 are located upstream of the rotating body 172 in the conveyance direction of the medium P. This allows the rotating brush 63 to maintain its ability to clean the rotating body 172 while suppressing dust such as medium powder from moving downstream in the conveyance direction due to air suction.

[0160] The medium transport device 9 further includes a receiving portion 65 below the rotating brush 63. The receiving portion 65 is attached to and detached from the device main body 2A in which the rotating brush 63 is provided, without coming into contact with the rotating brush 63. This reduces the scattering of dust such as ink and medium powder adhering to the rotating brush 63 when the receiving portion 65 is attached to and detached from the device main body 2A.

[0161] The recording device 1 includes a recording unit 8 that records on a medium P. The recording device 1 includes a rotating body 172 that transports the medium P by rotating about the axis of a rotation shaft 171. The recording device 1 includes a rotating brush 63 that has brushes 632, 633 on its circumferential surface and is rotatable about the axis of the rotation shaft 62 and movable in an approaching direction that intersects with the axis of the rotation shaft 171. The rotating body 172 has a plurality of teeth 71a on its circumferential surface and constitutes a registration roller pair 17 that corrects the inclination of the medium P upstream of the recording unit 8 in the transport direction of the medium P. The rotating brush 63 cleans the rotating body 172 by moving in the approaching direction while at least one of the rotating body 172 and the rotating brush 63 is rotating.

[0162] This allows the rotating brush 63 to move in the approaching direction, thereby cleaning the tooth portion 71a, including its side surface. This allows the medium P to be transported toward the recording unit 8 with high precision. It also prevents a decrease in the quality of recording on the medium P by the recording unit 8, which is caused by dust such as medium powder adhering to the recording unit 8. This makes it possible to realize a recording device 1 that can maintain the quality of recording on the medium P by the recording unit 8.

[0163] The medium conveying device 9 and recording device 1 according to the above-described embodiment of the present disclosure are basically configured as described above, but it is of course possible to modify or omit parts of the configuration without departing from the spirit of the present disclosure. The above-described embodiment and other embodiments described below can be combined with each other within the scope of technical compatibility. Other embodiments will be described below.

[0164] In the above embodiment, the rotating body 172 of the drive roller 17a does not have to be formed by alternately arranging a plurality of disk bodies 70 and toothed plates 71 in layers along the rotation shaft 171. For example, the rotating body 172 may be formed by arranging a plurality of toothed plates 71 in layers along the rotation shaft 171. Alternatively, the rotating body 172 may be formed by fixing one toothed plate 71 to the rotation shaft 171.

[0165] Alternatively, the rotating body 172 may be configured by forming the contact portion 175 directly on the outer circumferential surface of the rotating shaft 171. In this case, it can be said that the rotating shaft 171 constitutes the rotating body 172 that transports the medium P by rotating about the axis of the rotating shaft 171. The contact portion 175 may be formed by fixing a plurality of alumina particles to the outer circumferential surface of the rotating shaft 171 with a resin layer. In this case, the alumina particles that are fixed to the outer circumferential surface of the rotating shaft 171 and protrude from the outer circumferential surface of the rotating shaft 171 are an example of protrusions provided on the outer circumferential surface of the rotating body 172.

[0166] In the above embodiment, the contact portion 175 of the rotating body 172 does not necessarily need to be provided with a silicone coating layer such as polysilsesquioxane.

[0167] In the above embodiment, the base 631 of the rotating brush 63 does not have to be fixed to the rotation shaft 62. For example, the base 631 of the rotating brush 63 may be provided so as to be movable in the X-axis direction relative to the rotation shaft 62. When moving the rotating brush 63 in the X-axis direction relative to the rotation shaft 62, the control unit 90 drives the brush driving unit 61M to move the base 631 in the X-axis direction relative to the rotation shaft 62. In this case, the rotation shaft 62 does not have to move in the X-axis direction.

[0168] In the above embodiment, the base 631 of the rotating brush 63 does not have to be fixed to the rotary shaft 62. For example, the base 631 of the rotating brush 63 may be provided rotatably about the axis of the rotary shaft 62 relative to the rotary shaft 62. When rotating the rotary brush 63 about the axis of the rotary shaft 62, the control unit 90 drives the brush driving unit 61M to rotate the base 631 about the axis of the rotary brush 63 relative to the rotary shaft 62. In this case, the rotary shaft 62 does not have to rotate about its axis.

[0169] In the above embodiment, the multiple bristles of brushes 632, 633 do not have to be arranged continuously in a spiral around the circumferential surface of base 631. For example, brushes 632, 633 may be formed by arranging multiple bristles continuously in a ring shape that goes around the circumferential surface of base 631 to form a group of bristles, and arranging the ring-shaped group of bristles at intervals in the axial direction of rotation shaft 62.

[0170] When the brush unit 61 of this embodiment is viewed from the normal direction to the axis of the rotating shaft 62, the annular groups of bristles of the brush 632 and the annular groups of bristles of the brush 633 are alternately arranged along the axis of the rotating shaft 62. When the brush unit 61 of this embodiment is viewed from the normal direction to the axis of the rotating shaft 62, the axis of the ring shape along which the groups of bristles of the brushes 632 and 633 are arranged may be inclined with respect to the axis of the rotating shaft 62.

[0171] In the above embodiment, the bristles of brushes 632 and 633 do not have to extend in a direction inclined with respect to the normal to the circumferential surface of base 631. In this case, at least one of the bristles of brush 632 and brush 633 may extend in a direction along the normal to the circumferential surface of base 631. For example, the bristles of brush 632 and brush 633 may extend in a direction along the normal to the circumferential surface of base 631. Alternatively, of the bristles of brush 632 and brush 633, the bristles of brush 633 may extend in a direction along the normal to the circumferential surface of base 631.

[0172] In the above embodiment, at least one of the blowing unit 67 and the suction unit 69 may be driven while the rotating body 172 is transporting the medium P.

[0173] In the above embodiment, an actuator for operating the pump of the blowing unit 67 or the pump of the suction unit 69 may not be necessary. In this case, the pump may operate in conjunction with any of the opening and closing operations of the face-down discharge tray 4, the opening and closing cover 6, and the face-up discharge tray 7, or the attachment and detachment operation of the cassette 10A. For example, in the case of the blowing unit 67 shown in FIG. 11, the plunger 672 may be moved back and forth in the direction indicated by the arrow by being linked to the movement caused by the attachment and detachment operation of the cassette 10A.

[0174] In the above embodiment, the medium conveying device 9 does not necessarily have to include at least one of the blowing unit 67 and the suction unit 69.

[0175] In the above embodiment, cleaning of the rotating body 172 may be performed while the registration roller pair 17 is transporting the medium P. In other words, cleaning of the rotating body 172 may be performed while the rotating body 172 is transporting the medium P. For example, the rotating brush 63 may rotate about the axis of the rotating shaft 62 in conjunction with the rotation of the rotating body 172 about the axis of the rotating shaft 171 caused by the driving of the roller drive unit 17M. In this case, cleaning of the rotating body 172 is always performed at a predetermined timing while the rotating body 172 is transporting the medium P. [Explanation of symbols]

[0176] 1...recording device, 2A...device main body, 2B, 2C...extension unit, 2F...frame, 2F1, 2F2...guide, 3...scanner unit, 4...face-down output tray, 5...operation unit, 6, 6v...opening / closing cover, 6a...oscillating shaft, 7...face-up output tray, 7a...rotating shaft, 8...recording unit, 9...media conveying device, 10A, 10B, 10C...cassette, 11...hopper, 11a...shaft, 12...feed roller, 13...separation roller pair, 14...conveyance roller pair, 15...feed roller, 16...separation roller roller, 17... registration roller pair, 17a... drive roller, 17b... driven roller, 17M... roller drive unit, 18... belt conveyance unit, 18a... pulley, 18b... pulley, 18c... conveyance belt, 19a... driven roller, 19b... driven roller, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29... conveyance roller pair, 29a... drive roller, 29b... driven roller, 31... first flap, 31a... swing fulcrum, 32... second flap, 32a... swing fulcrum, 33, 33v ...flap, 34...discharge portion, 35...feed portion, 40...guide member, 41...manual feed tray, 41a...oscillating shaft, 60...cleaning portion, 61...brush portion, 61M...brush drive portion, 62...rotating shaft, 63...rotating brush, 64...removal portion, 65...receiving portion, 66...blowing outlet, 67...blowing portion, 68...suction port, 69...suction portion, 70...disk body, 71...toothed plate, 71a...tooth portion, 81...nozzle surface, 82...nozzle, 90...control portion, 171...rotating shaft, 172...rotating body, 175...contact portion, 631...base, 63 2,633...Brush, 651,652...Slope, 653...Screw hole, 671...Pump chamber, 672...Plunger, 673...Compression coil spring, 674...Valve chamber, 675...Intake side valve, 676...Exhaust side valve, 677...Dust collection container, F,G...Roller, P...Medium, R1...Recording transport path, R2...Switchback path, R3...Reverse path, R4...Face-down discharge path, R5...Face-up discharge path, S1,S2,S3...Feed path, T1...Face-up discharge trajectory, T2...Face-down discharge trajectory.

Claims

1. a rotating body that rotates around the axis of a first rotating shaft to transport a medium; a rotating brush having a brush on a peripheral surface thereof, rotatable about the axis of the second rotating shaft and movable in a direction intersecting the axis of the first rotating shaft; Equipped with The rotating body has a plurality of protrusions on its circumferential surface, The rotating brush cleans the rotating body by moving in the intersecting direction while at least one of the rotating body and the rotating brush is rotating. A medium transport device characterized by:

2. The medium transport device according to claim 1 , The brush is formed so as to be inclined relative to the protrusion. A medium transport device characterized by:

3. The medium transport device according to claim 2 , The brush is formed in a spiral shape. A medium transport device characterized by:

4. The medium transport device according to claim 2 , The rotary brush has a first brush and a second brush having bristles shorter than those of the first brush, The first brushes and the second brushes are alternately arranged along the axis of the second rotation shaft. A medium transport device characterized by:

5. The medium transport device according to claim 1 , The rotary brush is movable in a direction along the first rotation axis. A medium transport device characterized by:

6. The medium transport device according to claim 1 , The cleaning of the rotating body is performed when the rotating body is not transporting the medium. A medium transport device characterized by:

7. 7. The medium transport device according to claim 6, The cleaning of the rotating body is performed by moving the rotating brush in the intersecting direction while the rotating body and the rotating brush are rotating. A medium transport device characterized by:

8. The medium transport device according to claim 7, The rotating brush is rotatable in the same direction as the rotation direction of the rotating body. A medium transport device characterized by:

9. 9. The medium transport device according to claim 8, The rotating brush is rotatable in a direction opposite to the direction of rotation of the rotating body. A medium transport device characterized by:

10. The medium transport device according to claim 1 , Further, a removal unit that cleans the rotary brush is provided. the rotating brush and the removal unit are located upstream of the rotating body in the medium transport direction; A medium transport device characterized by:

11. The medium transport device according to claim 1 , Further provided is a blowing unit that blows air onto the rotary brush, the rotating brush is located upstream of the rotating body in the transport direction of the medium, The blowing unit is located downstream of the rotating brush in the medium transport direction. A medium transport device characterized by:

12. The medium transport device according to claim 1 , Further provided is a suction unit that sucks air, the rotating brush and the suction unit are located upstream of the rotor in the medium transport direction; A medium transport device characterized by:

13. The medium transport device according to claim 1 , A receiving portion is further provided below the rotary brush, the receiving portion is attached to and detached from the device body in which the rotating brush is provided, without contacting the rotating brush; A medium transport device characterized by:

14. a recording unit that records on the medium; a rotating body that rotates around the axis of a first rotating shaft to transport the medium; a rotating brush having a brush on a peripheral surface thereof, rotatable about the axis of the second rotating shaft and movable in a direction intersecting the axis of the first rotating shaft; Equipped with the rotating body has a plurality of protrusions on a peripheral surface thereof, and constitutes a pair of registration rollers that corrects the inclination of the medium upstream of the recording unit in the transport direction of the medium; The rotating brush cleans the rotating body by moving in the intersecting direction while at least one of the rotating body and the rotating brush is rotating. A recording device characterized by:

Images