Medium transport apparatus and recording apparatus

Abstract

To easily remove a medium stopped across rotating bodies of different driving sources.SOLUTION: The first rotors 20, 21, and 22, the second rotors 30 and 31, the first driving unit A, the second driving unit B, and the operation unit 70 connected to the first driving unit A and the second driving unit B and capable of manually operating the first rotors 20, 21, and 22 and the second rotors 30 and 31, wherein the operation unit 70 includes the input unit 71 capable of manually inputting an operation force and the switching unit 75 capable of switching between the transmission state and the disconnection state, the switching unit 75 includes a first switching unit C1 - 1 coupled to the first driving unit A and a second switching unit C1 - 2 coupled to the second driving unit B, and takes the disconnection state when the driving force is input from the first driving source M1 or the second driving source M2, and takes the transmission state when the driving force is not input from the first driving source M1 or the second driving source M2 and the operation force is input to the inputting unit 71.SELECTED DRAWING: Figure 2

Description

[Technical Field]

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

[0002] Various media transport devices have been used in the past for transporting media. Among these, there is a media transport device that includes multiple rotating bodies that rotate in contact with the medium as a medium transport unit to transport the medium. For example, Patent Document 1 discloses an inkjet printer that includes multiple pairs of transport rollers that rotate in contact with the medium to transport the medium. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2024-31520 Summary of the Invention [Problem to be solved by the invention]

[0004] In a media transport device equipped with multiple rotating bodies that rotate in contact with the media to transport the media, the media may stop in the transport path due to a jam, etc. Therefore, Patent Document 1 discloses that in order to remove jammed media, the drive roller is manually rotated using an operation unit, that is, the rotating body is rotated by rotating a handle.

[0005] On the other hand, to diversify media transport control, a configuration with a different drive source for each rotating body is considered. In such a configuration, in order to remove jammed media that has stopped between rotating bodies with different drive sources, the rotating bodies must be synchronized. For example, when moving jammed media downstream in the transport direction to remove them, rotating only the downstream rotating body makes it difficult to transport the media downstream because the upstream rotating body does not rotate. Rotating only the upstream rotating body does not rotate the downstream rotating body, making it difficult to transport the media downstream. Conventional media transport devices have not been able to easily remove media that has stopped between rotating bodies with different drive sources. [Means for solving the problem]

[0006] In order to solve the above problem, a medium transport device of the present invention includes a first rotating body that rotates in contact with a medium to transport the medium in a transport direction, a second rotating body that rotates in contact with the medium transported by the first rotating body downstream of the first rotating body in the transport direction to transport the medium in the transport direction, a first driving unit that drives the first rotating body with a driving force of a first driving source, a second driving unit that drives the second rotating body with a driving force of a second driving source, and an operation unit that is connected to the first driving unit and the second driving unit and can manually operate the first rotating body and the second rotating body, and a switching unit that can switch between a transmission state in which drive is transmitted between the input unit and the first drive unit and the second drive unit, and a disconnection state in which drive is not transmitted between the input unit and the first drive unit and the second drive unit, wherein the switching unit has a first switching unit that is connected to the first drive unit and a second switching unit that is connected to the second drive unit, and is in the disconnection state when drive force is input from the first drive source or the second drive source, and is in the transmission state when drive force is not input from the first drive source or the second drive source and an operation force is input to the input unit. [Brief explanation of the drawings]

[0007] [Figure 1] 1 is a diagram showing the internal configuration of a recording device as a medium conveying device according to a first embodiment of the present invention, as viewed from the front side. [Figure 2] FIG. 2 is a rear view of the protruding unit of the recording apparatus of FIG. 1. [Figure 3] FIG. 2 is a perspective view of an operation unit of the recording apparatus of FIG. [Figure 4] 2 is a perspective view showing a part of a switching unit of an operation unit of the recording apparatus in FIG. 1 and its surroundings. [Figure 5] FIG. 2 is a perspective view showing the periphery of an input unit of an operation unit of the recording apparatus of FIG. 1. [Figure 6] 5 is a perspective view showing a part of the switching unit of the recording apparatus of FIG. 1, which is different from that of FIG. 4, and its surroundings. [Figure 7] 2 is a schematic diagram of the wheel train of the recording device of FIG. 1 as seen from the front side, illustrating the rotational state of each gear of the wheel train when the first drive source and the second drive source are driven. FIG. [Figure 8] 2 is a schematic diagram of the wheel train of the recording device of FIG. 1 as seen from the front side, illustrating the rotational state of each gear of the wheel train when the input unit is rotated counterclockwise. FIG. [Figure 9] 2 is a schematic diagram of the gear train of the recording device of FIG. 1 as seen from the front side, showing the rotational state of each gear of the gear train when the input unit is rotated clockwise. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0008] The present invention will be briefly described below. A medium transport device according to a first aspect of the present invention includes a first rotating body that rotates in contact with a medium to transport the medium in a transport direction; a second rotating body that rotates in contact with the medium transported by the first rotating body downstream of the first rotating body in the transport direction to transport the medium in the transport direction; a first driving unit that drives the first rotating body with a driving force of a first driving source; a second driving unit that drives the second rotating body with a driving force of a second driving source; and an operation unit that is connected to the first driving unit and the second driving unit and can manually operate the first rotating body and the second rotating body, and the operation unit is manually operated. and a switching unit that can switch between a transmission state in which drive force is transmitted between the input unit and the first drive unit and the second drive unit, and a disconnection state in which drive force is not transmitted between the input unit and the first drive unit and the second drive unit, wherein the switching unit has a first switching unit that is connected to the first drive unit and a second switching unit that is connected to the second drive unit, and is in the disconnection state when drive force is input from the first drive source or the second drive source, and is in the transmission state when drive force is not input from the first drive source or the second drive source and an operating force is input to the input unit.

[0009] According to this aspect, in a configuration in which multiple rotating bodies, namely, a first rotating body and a second rotating body, are driven by separate driving sources, namely, a first driving unit and a second driving unit, an operating unit coupled to both driving units is provided. This allows both the first rotating body and the second rotating body to be rotated in unison by inputting an operating force to a single operating unit. Meanwhile, when at least one of the first driving unit and the second driving unit is driven by a driving source, the operating unit is in a disconnected state, thereby suppressing the load associated with coupling the operating unit to the driving unit. Furthermore, in cases where there are other rotating bodies in addition to the first rotating body and the second rotating body, the load associated with coupling the operating unit to the driving unit can be suppressed from being applied to the other rotating bodies. In other words, media that have stopped across rotating bodies of different driving sources can be easily removed.

[0010] A medium conveying device according to a second aspect of the present invention is an aspect dependent on the first aspect, and is characterized in that the first rotating body and the second rotating body rotate in a first rotation direction to convey the medium downstream in the conveying direction, and are configured to be rotatable only in the first rotation direction when the operating force is input to the input portion.

[0011] According to this aspect, the first and second rotating bodies are configured to rotate in a first rotation direction to transport the medium downstream in the transport direction, and are configured to rotate only in the first rotation direction when an operating force is input to the input unit. In this way, by limiting the direction of movement of the medium when an operating force is input to the input unit, it is possible to prevent the medium from moving in an unintended direction.

[0012] A medium transport device according to a third aspect of the present invention is an aspect dependent on the second aspect, characterized in that the first switching unit and the second switching unit are one-way clutches.

[0013] According to this aspect, the first switching unit and the second switching unit are one-way clutches, which simplifies the configuration.

[0014] A medium conveying device according to a fourth aspect of the present invention is an aspect dependent on any one of the first to third aspects, and is characterized in that the first switching unit and the second switching unit are arranged coaxially with the input unit.

[0015] According to this aspect, the first switching unit and the second switching unit are provided coaxially with the input unit. This configuration reduces the space occupied by the first switching unit, the second switching unit, etc. inside the medium conveying device.

[0016] A media conveying device according to a fifth aspect of the present invention is an aspect dependent on the fourth aspect, and is characterized in that the operating unit has a shaft portion that rotates integrally with the input unit, the first driving unit has a first gear that rotates around the shaft portion, the second driving unit has a second gear that rotates around the shaft portion, the first switching unit is a one-way clutch that switches between the transmission state and the disconnection state between the shaft portion and the first gear, and the second switching unit is a one-way clutch that switches between the transmission state and the disconnection state between the shaft portion and the second gear.

[0017] According to this aspect, the operation unit has a shaft that rotates integrally with the input unit, the first drive unit has a first gear that rotates about the shaft, the second drive unit has a second gear that rotates about the shaft, the first switching unit is a one-way clutch that switches between a transmission state and a disconnection state between the shaft and the first gear, and the second switching unit is a one-way clutch that switches between a transmission state and a disconnection state between the shaft and the second gear. With this configuration, it is possible to reduce the space occupied by the first switching unit, the second switching unit, etc. inside the medium transport device and to simplify their configurations.

[0018] A media conveying device according to a sixth aspect of the present invention is an aspect dependent on any one of the first to fifth aspects, and is characterized in that the gear ratio between the first gear and the first rotating body is equal to the gear ratio between the second gear and the second rotating body.

[0019] According to this aspect, the gear ratio between the first gear and the first rotating body is equal to the gear ratio between the second gear and the second rotating body. By aligning the gear ratios and rotating the first gear and second gear at a uniform speed with this configuration, it is possible to prevent bending of the medium and friction between the medium and the rotating body.

[0020] A media conveying device according to a seventh aspect of the present invention is an aspect dependent on any one of the first to sixth aspects, and is characterized in that the first rotating body and the second rotating body rotate at the same speed when the switching unit is in the transmission state.

[0021] According to this aspect, the first rotating body and the second rotating body rotate at the same speed when the switching unit is in the transmission state. By rotating the first gear and the second gear at the same speed with this configuration, it is possible to prevent bending of the medium and friction between the medium and the rotating body.

[0022] The medium conveying device according to an eighth aspect of the present invention is an aspect dependent on any one of the first to seventh aspects, and is characterized in that it further comprises a housing capable of accommodating the first rotating body, the second rotating body, the first driving unit, the second driving unit, and the operating unit, and the second rotating body is an ejection roller that ejects the medium from the housing.

[0023] According to this aspect, the printer further includes a housing that can accommodate the first rotating body, the second rotating body, the first drive unit, the second drive unit, and the operation unit, and the second rotating body is an ejection roller that ejects the media from the housing. By configuring the ejection roller in this way and driving it separately from the first rotating body, it is possible to achieve both improved productivity and improved alignment of the ejected media.

[0024] A medium transport device according to a ninth aspect of the present invention is an aspect dependent on any one of the first to eighth aspects, and further comprises a housing capable of accommodating the first rotating body, the second rotating body, the first driving unit, the second driving unit, and the operating unit, and a displacement unit capable of displacing the first rotating body, the second rotating body, the first driving unit, the second driving unit, and the operating unit between a housed state in which they are housed in the housing and a protruding state in which they protrude from the housing, and is characterized in that the input unit is exposed from the housing in the protruding state.

[0025] According to this aspect, the device further includes a housing capable of housing the first rotating body, the second rotating body, the first driving unit, the second driving unit, and the operation unit, and a displacement unit capable of displacing the first rotating body, the second rotating body, the first driving unit, the second driving unit, and the operation unit between a housed state in which they are housed in the housing and a protruding state in which they protrude from the housing, and the input unit is exposed from the housing in the protruding state. With this configuration, the operation unit can be exposed in the protruding state in which it protrudes from the housing, making it easier to remove a jammed medium, for example.

[0026] A medium conveying device according to a 10th aspect of the present invention is an aspect dependent on any one of the 1st to 9th aspects, and is characterized in that it further comprises a control unit that controls the second drive source and a receiving unit that receives a designation of the drive force of the second drive source.

[0027] According to this aspect, the device further includes a control unit that controls the second drive source and a receiving unit that receives a designation of the drive force of the second drive source. With this configuration, the drive force of the second drive source, i.e., the speed of the second rotating body, can be designated, thereby improving usability.

[0028] The medium conveying device according to the 11th aspect of the present invention is an aspect dependent on the 10th aspect, and is characterized in that the receiving unit is capable of receiving an instruction to reset the designation of the driving force of the second driving source.

[0029] According to this aspect, the receiving unit can receive an instruction to reset the designated driving force of the second driving source. With this configuration, the driving force of the second driving source, i.e., the speed of the second rotating body, can be reset, thereby improving usability.

[0030] A recording device according to a 12th aspect of the present invention comprises a medium conveying device according to any one of the first to 11th aspects and a recording unit that records on the medium conveyed by the medium conveying device, wherein the medium conveying device has a feeding path that feeds the medium to the recording unit, an inversion path that inverts the front and back of the medium recorded by the recording unit and merges with the feeding path, and a first discharge path that discharges the medium recorded by the recording unit, wherein the first drive source drives a reverse path rotor located on the inversion path, and the second rotor is located on the first discharge path.

[0031] According to this aspect, a recording unit is further provided for recording on the medium transported by the medium transport device, which allows recording on the medium transported by the medium transport device, and which can easily remove the medium stopped between the rotating bodies of different drive sources.

[0032] A recording device according to a thirteenth aspect of the present invention is an aspect dependent on the twelfth aspect, characterized in that the first discharge path is a discharge path that discharges the medium recorded by the recording unit without curving it, the medium conveying device further has a second discharge path that branches off from the first discharge path and discharges the medium recorded by the recording unit while curving it, the first rotating body and the second rotating body are located on the first discharge path, and the first drive source drives the second discharge path rotating body located on the second discharge path.

[0033] According to this aspect, in addition to the first ejection path, a second ejection path is provided, and media that have stopped straddling the rotating bodies of different drive sources can be easily removed not only from the first ejection path but also from the second ejection path.

[0034] A recording device 1, which is one embodiment of a medium conveying device of the present invention, will be described below with reference to FIGS. 1 to 9. In the XYZ coordinate system shown in each figure, the X axis direction indicates the front and back directions of the device and the width direction of the medium, the Y axis direction indicates the side direction of the device, and the Z axis direction indicates the height direction of the device and the direction of gravity. Note that the direction in which the medium P is conveyed is referred to as "downstream," and the opposite direction is referred to as "upstream." In addition, in each figure, some components may be omitted or simplified to make the internal configuration easier to understand.

[0035] First, an overview of the recording device 1 of this embodiment will be described with reference to FIG. 1. As shown in FIG. 1, the recording device 1 of this embodiment includes a housing 53 and a discharge tray 4 that receives media P that have been recorded on and discharged. The discharge tray 4 is provided with a rib 4a that can move in an upward direction D3 and a downward direction D4. Basically, the rib 4a is positioned in the upward direction D3 when there are few media P stacked on the discharge tray 4 or when the recording duty of the recorded media P is high, and is positioned in the downward direction D4 when there are many media P stacked on the discharge tray 4 or when the recording duty of the recorded media P is low. In this way, the rib 4a can automatically move in the upward direction D3 and the downward direction D4 depending on the size and number of media P stacked on the discharge tray 4. However, it is also possible to select whether to position the rib 4a in the upward direction D3 or the downward direction D4 in response to a user instruction via an external computer (not shown).

[0036] The recording device 1 also has an opening / closing cover 6, which is rotatable about a rotation axis (not shown) and can be opened and closed by rotating about the rotation axis. A manual feed tray 41 is provided on the opening / closing cover 6. The manual feed tray 41 swings about a swing axis 41a, so that it can be opened and closed relative to the opening / closing cover 6.

[0037] The recording device 1 has three medium feeding paths: a feeding path from the medium cassette 10A corresponding to the cassette feeding locus S1, a feeding path from an expansion cassette (not shown) corresponding to the expansion cassette feeding locus S2, and a feeding path from the manual feed tray 41 on which the medium P is placed corresponding to the manual feed path S3. The recording device 1 has three medium ejection methods: face-up ejection, which corresponds to the face-up ejection locus T1 and ejects the medium with the most recently printed first side facing up; face-down ejection, which corresponds to the face-down ejection locus T2 and ejects the medium with the first side facing down; and ejection to a post-processing device that performs post-processing on the medium P when the post-processing device is connected downstream of the recording device 1, which corresponds to the finisher ejection locus T3.

[0038] The recording device 1 is equipped with a face-up paper output tray 7 that receives media P that are discharged face-up. The face-up paper output tray 7 can be placed in a stored state shown in Figure 1 or in an open state (not shown) by rotating about a rotation axis 7a. The recording device 1 also has six media transport paths: a recording transport path R1, a switchback path R2, a reversing path R3, a face-down discharge path R4, a face-up discharge path R5, and a finisher discharge path R6.

[0039] The most downstream portion of the face-down discharge path R4 is configured as a discharge mechanism 36. Area J1 in FIG. 1 is provided with spurs, which are multiple driven rollers that rotate in response to the medium P. The discharge mechanism 36 is provided with a fan 54 that can blow air onto the medium P. Basically, the fan 54 stops blowing air when the recording duty of the recorded medium P (the amount of ink ejected onto the medium P as a result of recording) is low, and starts blowing air when the recording duty of the recorded medium P is high. In this way, the fan 54 can automatically switch between blowing air and stopping air blowing depending on the recording duty of the recorded medium P, but it is also possible to select whether the fan 54 blows air or stops blowing air in response to instructions from the user via an external computer (not shown) or the like.

[0040] Furthermore, the discharge mechanism unit 36 ​​can automatically change the discharge speed of the medium P immediately before it is discharged to the discharge tray 4 in multiple stages depending on the recording duty of the recorded medium P. Basically, the higher the recording duty of the recorded medium P, the slower the discharge speed of the medium P immediately before it is discharged to the discharge tray 4. However, it is also possible to select the discharge speed of the medium P by receiving instructions from the user via an external computer (not shown). Furthermore, the discharge mechanism unit 36 ​​can temporarily suspend the transport of the medium P immediately before it is discharged to the discharge tray 4 to ensure drying time depending on the recording duty of the recorded medium P. It is also possible to increase the speed of the medium P by the discharge roller pair 25 before discharging it to the discharge tray 4 to prevent the medium P from accumulating in downstream areas of the medium transport path, for example.

[0041] Note that the same discharge process as described above can also be performed on the face-up discharge path R5. That is, the discharge speed of the medium P immediately before it is discharged to the face-up paper output tray 7 can be automatically changed in multiple stages depending on the recording duty of the recorded medium P. Basically, the higher the recording duty of the recorded medium P, the slower the discharge speed of the medium P immediately before it is discharged to the face-up paper output tray 7. However, it is also possible to select the discharge speed of the medium P by receiving instructions from the user via an external computer (not shown). Furthermore, the discharge mechanism unit 36 ​​can temporarily suspend the transport of the medium P immediately before it is discharged to the face-up paper output tray 7 depending on the recording duty of the recorded medium P.

[0042] The control unit 9, which performs various controls, acquires recording data, which is data for recording, generated by a printer driver running on an external computer (not shown) or a printer driver included in the control unit 9. Based on the recording data, the control unit 9 controls the inkjet recording head 8, various media transport rollers driven by motors (not shown), and flaps, which are path switching members. The control unit 9 performs necessary control based on the detection status of various sensors, such as a sensor that detects the passage of the medium P. The control unit 9 is conceptually shown in FIG. 1 and is actually configured by a circuit board installed in a predetermined position within the device main body 35.

[0043] Here, we will explain the medium feeding path up to the pair of registration rollers 17. Medium cassette 10A, which is detachably mounted on device main body 35, is equipped with hopper 11, and as hopper 11 swings around axis 11a, medium P stored in medium cassette 10A moves toward and away from feed roller 12, which is driven to rotate by a motor (not shown).

[0044] The medium P sent out from the medium cassette 10A by the feed roller 12 passes through the nip position of the separation roller pair 13 to prevent double feeding, and then receives a feeding force from the transport roller pair 14 and reaches the registration roller pair 17. Additional cassettes (not shown) located below the device main body 35 are also equipped with feed rollers 12 and separation roller pairs 13, and the medium P sent out from each additional cassette receives a feeding force from the transport roller pair 14 shown in FIG. 1 and reaches the registration roller pair 17. The manual feed path S3, which is the medium feed path from the manual feed tray 41, is provided with a feed roller 15 and a separation roller 16, and the medium P set in the manual feed tray 41 reaches the registration roller pair 17 by the rotation of these rollers.

[0045] The medium transport path is provided with a registration roller pair 17, transport roller pairs 20-24, transport roller pairs 26-31, and a discharge roller pair 25 as a discharge unit that discharges the medium P. Each roller pair has a drive roller driven by a motor (not shown) and a driven roller that can nip the medium P between itself and the drive roller and that contacts the medium P and rotates in response to the rotation. A recording transport path R1 as a first transport path passes under a recording head 8 as a recording unit that records on the medium P, and extends upstream and downstream of the recording head 8. In the recording transport path R1, the medium P receives a feed force from the registration roller pair 17 and a belt unit 18. The belt unit 18 has an electrostatic attraction belt 181 that transports the medium P, and a drive roller 182 and a driven roller 183 around which the electrostatic attraction belt 181 is wound.

[0046] The recording head 8 of this embodiment is a so-called line head in which nozzles that eject ink are arranged to cover the entire width of the medium, and is configured as a recording head that can record across the entire width of the medium without moving in the width direction of the medium. However, if the recording unit is one that records by ejecting liquid such as ink onto the medium P, it is not limited to a line head. Furthermore, instead of a recording unit that ejects liquid ink, a recording unit that records using toner may be provided.

[0047] The switchback path R2 as the second transport path is a medium transport path that connects to the recording transport path R1, and after feeding the medium P that has passed under the recording head 8 to the left in Fig. 1, switches back and transports the medium P to the right in Fig. 1, which is the opposite direction to the feeding direction, and is located inside the curve of the 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.

[0048] The reverse path R3 as a third transport path is a medium transport path that connects to the switchback path R2, and reverses the medium P transported in the reverse direction, which is to the right in FIG. 1, by detouring above the recording head 8 and merging with the recording transport path R1 at a position upstream of the recording head 8, which in this embodiment is a position upstream of the registration roller pair 17. In the reverse path R3, the medium P receives a feeding force from the transport roller pairs 27, 28, and 29.

[0049] The face-down discharge path R4, which serves as the fourth transport path, is a medium transport path that connects to the recording transport path R1 and is a path for curving the medium P that has passed under the recording head 8 so that the surface facing the recording head 8 is inward, inverting it, and discharging it. In the face-down discharge path R4, the medium P receives a feeding force from the pairs of transport rollers 20, 21, 22, 23, and 24 and the pair of discharge rollers 25. As described above, the most downstream side of the face-down discharge path R4 is configured by the discharge mechanism unit 36. At the connection points of the respective medium transport paths, flaps are provided as path switching members that switch the medium transport paths. The path along which the medium P travels is determined by the flaps.

[0050] As described above, the face-up discharge path R5, which serves as the fifth transport path, is a path that discharges the medium P that has passed under the recording head 8 onto the face-up paper output tray 7 so that the surface facing the recording head 8 faces upward. The face-up discharge path R5 is provided with a transport roller pair 30. As described above, the finisher discharge path R6, which serves as the sixth transport path, is a discharge path to a post-processing device that performs post-processing on the medium P when such a device is connected downstream of the recording device 1. The finisher discharge path R6 is provided with a transport roller pair 31.

[0051] The recording apparatus 1 of this embodiment is configured so that a protruding unit 100 having multiple internal components can be protruded by moving the protruding unit 100 from the housing 53 in a protruding direction D1. The protruding unit 100 corresponds to the left-hand region in FIG. 1 , which includes a face-down discharge path R4 including the transport roller pairs 20, 21, 22, and 23, a face-up discharge path R5 including the face-up paper output tray 7 and the transport roller pair 30, and a finisher discharge path R6 including the transport roller pair 31. By moving the protruding unit 100 in the protruding direction D1 relative to the housing 53 and protruding it, it becomes easy to remove the medium P if the medium P jams in the medium transport path. The protruding unit 100 can be easily returned to the state shown in FIG. 1 by inserting it into the housing 53 in an insertion direction D2. Details of the protruding unit 100 are described below with reference to FIGS. 2 to 6.

[0052] 2 shows the overall configuration of protrusion unit 100 as seen from the rear, and includes a gear train made up of a motor and gears, all of which have rotation axes aligned in the X-axis direction. Specifically, protrusion unit 100 includes motor M1 as a first drive source, gear A0 attached to the rotation axis of motor M1, and belt 81 attached to gear A0. Furthermore, protrusion unit 100 includes gear A1 to which belt 81 is attached, gear A2 meshing with gear A1, gear A3 meshing with gear A2, gear A4 meshing with gear A3, gear A5 meshing with gear A4, gear A6 meshing with gear A5, and gear A7 meshing with gear A6. In other words, gear A1, gear A2, gear A3, gear A4, gear A5, gear A6, and gear A7 are configured to be rotatable by the driving force of motor M1 and constitute a first gear train A. Here, the rotation axis of gear A1 is the rotation axis of the drive roller of conveying roller pair 20, the rotation axis of gear A3 is the rotation axis of the drive roller of conveying roller pair 21, and the rotation axis of gear A7 is the rotation axis of the drive roller of conveying roller pair 22.

[0053] The protrusion unit 100 also has a motor M2 as a second drive source, a gear B0 attached to the rotation shaft of the motor M2, and a belt 82 attached to the gear B0. Furthermore, the protrusion unit 100 also has a gear B1 to which the belt 82 is attached, a gear B2 meshing with the gear B1, a gear B3 meshing with the gear B2, and a gear B4 meshing with the gear B3. That is, the gears B1, B2, B3, and B4 are configured to be rotatable by the driving force of the motor M2 and constitute a second gear train B. Here, the rotation shaft of the gear B2 is the rotation shaft of the drive roller of the transport roller pair 30, and the rotation shaft of the gear B4 is the rotation shaft of the drive roller of the transport roller pair 31.

[0054] Because the first gear train A and the second gear train B have different drive sources, the control unit 9 can drive them differently. For example, the transport roller pair 20, 21, and 23 corresponding to the first gear train A can be rotated faster to increase the transport speed in order to improve productivity, and the transport roller pair 30 and 31 corresponding to the second gear train B can be rotated slower to reduce the transport speed in order to prevent the medium P from jumping out when it is discharged. Furthermore, depending on the type of medium P, the transport roller pair 20, 21, and 23 corresponding to the first gear train A and the transport roller pair 30 and 31 corresponding to the second gear train B can be finely adjusted to each have an optimal rotation speed.

[0055] Furthermore, the protruding unit 100 has an operation unit 70 shown in FIG. 3 and other figures. The operation unit 70 is exposed from the housing 53 when the protruding unit 100 moves in the protruding direction D1 relative to the housing 53. A user can rotate a first rotating body such as the transport roller pairs 20, 21, and 22 and a second rotating body such as the transport roller pairs 30 and 31 by moving the protruding unit 100 in the protruding direction D1 relative to the housing 53 and manually operating the operation unit 70. In other words, if a medium P jams in the medium transport path, for example, the user can manually move the medium P downstream in the transport direction and remove the medium P from a desired position that is easy to remove.

[0056] 3 to 6, the operating unit 70 includes an input unit 71 that can be manually rotated by the user in directions D5 and D6 (i.e., to which the user can manually input an operating force), a shaft 72 that rotates with the rotation of the input unit 71, gears C1-1 and C1-2 that are both connected to the shaft 72, a gear C2-1 that is provided near the gear C1-1 but does not mesh with the gear C1-1, and a gear C2-2 that meshes with the gear C1-2. Furthermore, as shown in FIGS. 2 and 4, the operating unit 70 includes a gear C3 that meshes with the gear B4 and with the gear C2-1. The gears C1-1, C1-2, C2-1, C2-2, and C3 together form the third gear train C and a switching unit 75, which will be described later.

[0057] Here, gears C2-1 and C2-2 rotate together because they share a common shaft portion 73. In addition, switching unit 75 has a one-way clutch. In this embodiment, gear C1-1 functions as a one-way clutch and has an outer portion C1-1a that meshes with gear A3 and an inner portion C1-1b that is connected to shaft portion 72. When outer portion C1-1a rotates in rotation direction D5, inner portion C1-1b also rotates together, but when outer portion C1-1a rotates in rotation direction D6, inner portion C1-1b does not rotate together and the outer portion C1-1a spins freely. When inner portion C1-1b rotates in rotation direction D6, outer portion C1-1a also rotates together, but when inner portion C1-1b rotates in rotation direction D5, outer portion C1-1a does not rotate together and the inner portion C1-1b spins freely.

[0058] Similarly, gear C1-2 also functions as a one-way clutch and has an outer portion C1-2a and an inner portion C1-2b connected to shaft portion 72. When outer portion C1-2a rotates in rotation direction D5, inner portion C1-2b also rotates with it, but when outer portion C1-2a rotates in rotation direction D6, inner portion C1-2b does not rotate with it and outer portion C1-2a spins freely. Also, when inner portion C1-2b rotates in rotation direction D6, outer portion C1-2a also rotates with it, but when inner portion C1-2b rotates in rotation direction D5, outer portion C1-2a does not rotate with it and inner portion C1-2b spins freely.

[0059] As described above, the recording device 1 of this embodiment as a medium transport device can be described as including a first rotating body such as transport roller pairs 20, 21, and 22 that rotate in contact with the medium P to transport the medium P in the transport direction, and a second rotating body such as transport roller pairs 30 and 31 that is located downstream of the first rotating body in the transport direction of the medium P and rotates in contact with the medium P transported by the first rotating body to transport the medium P in the transport direction. The recording device 1 of this embodiment also includes a first gear train A as a first drive unit that drives the first rotating body with the driving force of a motor M1 as a first drive source, a second gear train B as a second drive unit that drives the second rotating body with the driving force of a motor M2 as a second drive source, and an operation unit 70 that is connected to the first gear train A and the second gear train B and can manually operate the first rotating body and the second rotating body.

[0060] Here, with reference to FIGS. 7 to 9, the drive of the first gear train A, second gear train B, and third gear train C in response to operation of the operation unit 70 will be described. FIG. 7 shows the movement of the gear trains when the recording device 1 is transporting the medium P in the transport direction during recording or other such operations. At this time, gear A3, which shares a common rotation axis with the drive roller of transport roller pair 21, rotates in rotation direction D5 due to the driving force of motor M1. Furthermore, gear B4, which shares a common rotation axis with the drive roller of transport roller pair 31, rotates in rotation direction D5 due to the driving force of motor M2. As gear A3 rotates in rotation direction D5, outer portion C1-1a of gear C1-1 rotates in rotation direction D6. However, as described above, gear C1-1 is a one-way clutch, and even when outer portion C1-1a rotates in rotation direction D6, inner portion C1-1b does not rotate with it, and outer portion C1-1a spins freely.

[0061] Furthermore, as gear B4 rotates in rotational direction D5, gear C3 rotates in rotational direction D6, and as gear C3 rotates in rotational direction D6, gear C2-1 rotates in rotational direction D5. As gear C2-1 rotates in rotational direction D5, shaft portion 73 and gear C2-2 also rotate in rotational direction D5. Therefore, as gear C2-2 rotates in rotational direction D5, outer portion C1-2a of rotating gear C1-2 rotates in rotational direction D6. However, as described above, gear C1-1 is a one-way clutch, and even when outer portion C1-1a rotates in rotational direction D6, inner portion C1-1b does not rotate with it, and outer portion C1-1a rotates freely. In this way, the recording device 1 of this embodiment is configured so that the input unit 71 and shaft portion 72 of the operation unit 70 do not rotate even when motors M1 and M2 are driven to transport medium P.

[0062] Next, FIG. 8 shows the movement of the gear train when a user rotates the input unit 71 in rotation direction D6, for example, when a jam occurs. When the user rotates the input unit 71 in rotation direction D6, the shaft 72 also rotates in rotation direction D6, causing the inner portion C1-1b of the gear C1-1 and the inner portion C1-2b of the gear C1-2 to rotate in rotation direction D6. As the inner portion C1-1b rotates, the outer portion C1-1a also rotates in rotation direction D6, and as the inner portion C1-2b rotates, the outer portion C1-2a also rotates in rotation direction D6. When the outer portion C1-1a rotates in rotation direction D6, the gear A3, i.e., the drive roller of the transport roller pair 21, also rotates in rotation direction D5. Furthermore, via the first gear train A, the gears A1 and A7, i.e., the drive rollers of the transport roller pairs 20 and 22, also rotate in rotation direction D5. When the input portion 71 is rotated, the drive rollers of the transport roller pair 20 and 22 do not have to be rotated.

[0063] When the outer portion C1-2a rotates in the rotation direction D6, the gear C2-2 rotates in the rotation direction D5, and accordingly, the shaft portion 73 and the gear C2-1 also rotate in the rotation direction D5. Then, as the gear C2-1 rotates in the rotation direction D5, the gear C3 rotates in the rotation direction D6, and accordingly, the gear B4, i.e., the drive roller of the transport roller pair 31, rotates in the rotation direction D5. The rotation of the drive rollers of the transport roller pairs 20, 21, and 22 in the rotation direction D5 and the rotation of the drive roller of the transport roller pair 31 in the rotation direction D5 correspond to the rotation of the medium P when transporting it downstream in the transport direction.

[0064] Next, Figure 9 shows the movement of the gear train when the user rotates the input unit 71 in rotational direction D5. When the user rotates the input unit 71 in rotational direction D5, the shaft unit 72 also rotates in rotational direction D5, and the inner part C1-1b of the gear C1-1 and the inner part C1-2b of the gear C1-2 also rotate in rotational direction D5. However, the outer part C1-1a does not rotate in rotational direction D5 as the inner part C1-1b rotates, and the outer part C1-2a does not rotate in rotational direction D5 as the inner part C1-2b rotates. In other words, even if the user rotates the input unit 71 in rotational direction D5, the input unit 71, shaft unit 72, inner part C1-1b, and inner part C1-2b simply rotate freely.

[0065] From another perspective, the operating unit 70 has an input unit 71 that allows the user to manually input an operating force, and a switching unit 75 that can switch between a transmission state in which drive force is transmitted between the input unit 71 and the first and second wheel trains A and B, and a disconnection state in which drive force is not transmitted between the input unit 71 and the first and second wheel trains A and B. The switching unit 75 has a gear C1-1 that is connected to gear A3, and also has a gear C1-2 that is connected to gear B4 via gear C2-2, shaft unit 73, gear C2-1, and gear C3. In other words, the switching unit 75 can be considered to have a first switching unit that is connected to the first wheel train A and a second switching unit that is connected to the second wheel train B. The switching unit 75 can be in a disconnected state when a driving force is input from at least one of the motors M1 and M2, as shown in FIG. 7, and in a transmitted state when a driving force is not input from the motors M1 and M2 and an operating force is input to the input unit 71, as shown in FIG. 8.

[0066] In a configuration like the recording device 1 of this embodiment, in which multiple rotating bodies, namely, first rotating bodies such as the transport roller pairs 20, 21, and 22 and second rotating bodies such as the transport roller pairs 30 and 31, are driven by separate driving sources, namely, motors M1 and M2, by providing an operating unit 70 connected to the driving units of both the first gear train A and the second gear train B, it is possible to rotate both the first rotating body and the second rotating body in conjunction with each other by inputting an operating force to one operating unit 70. On the other hand, when at least one of the driving sources, motors M1 and M2, is driven, the operating unit 70 is in a disconnected state, thereby suppressing the load caused by connecting the operating unit 70 to the driving units.

[0067] Furthermore, in cases where there are other rotating bodies in addition to the first and second rotating bodies, the operating unit 70 can be prevented from being affected by the load associated with connecting the operating unit 70 to the drive unit. In other words, by being able to easily move the medium P to the desired position without placing an excessive burden on the medium P, it is possible to easily remove, for example, a medium P that has stopped between rotating bodies of different drive sources. Note that there are no particular limitations on where the operating unit 70 is connected to the drive units such as the first gear train A and the second gear train B, and it may be connected to a location different from that in this embodiment.

[0068] The first rotators, such as the transport roller pairs 20, 21, and 22, and the second rotators, such as the transport roller pairs 30 and 31, rotate in a rotation direction D5, which is a first rotation direction, to transport the medium P downstream in the transport direction. As described above, the first rotators and the second rotators are configured to rotate only in the first rotation direction when an operating force is input to the input unit 71. By limiting the movement direction of the medium P when an operating force is input to the input unit 71 in this manner, it is possible to prevent the medium P from moving in an unintended direction, such as upstream in the transport direction. Note that in this embodiment, the movement direction of the medium P when an operating force is input to the input unit 71 is downstream in the transport direction, preventing the medium P from moving upstream. However, this is not limited to this. In other words, if it is easier to remove the medium P by moving the medium P upstream in the transport direction, the movement direction of the medium P when an operating force is input to the input unit 71 may be upstream in the transport direction, preventing the medium P from moving downstream.

[0069] As described above, the first switching unit and the second switching unit are one-way clutches. In other words, the gears C1-1 and C1-2 that constitute the first switching unit and the second switching unit function as one-way clutches. This configuration simplifies the configuration of the switching unit 75.

[0070] Furthermore, in the recording device 1 of this embodiment, the gears C1-1 and C1-2 that constitute the first and second switching units are provided coaxially with the input unit 71. With this configuration, it is possible to reduce the space occupied by the first and second switching units, etc., inside the medium transport device.

[0071] More specifically, the operating unit 70 has a shaft portion 72 that rotates integrally with the input unit 71. Here, the outer portion C1-1a of the gear C1-1 meshes with the gear A3 that constitutes the first gear train A, and the outer portion C1-2a of the gear C1-2 meshes with the gear B4 that constitutes the second gear train B via the gear C2-2, the shaft portion 73, the gear C2-1, and the gear C3. For this reason, the outer portion C1-1a of the gear C1-1 can be considered to be included in the first gear train A, and the outer portion C1-2a of the gear C1-2 can be considered to be included in the second gear train B.

[0072] If the outer portion C1-1a of the gear C1-1 is considered to be included in the first gear train A and the outer portion C1-2a of the gear C1-2 is considered to be included in the second gear train B, then the first gear train A can be described as having the outer portion C1-1a as a first gear that rotates about the shaft portion 72, and the second gear train B can be described as having the outer portion C1-2a as a second gear that rotates about the shaft portion 72. The gear C1-1 as the first switching unit can be described as a one-way clutch that switches between a transmission state and a disconnection state between the shaft portion 72 and the outer portion C1-1a as the first gear, and the gear C1-2 as the second switching unit can be described as a one-way clutch that switches between a transmission state and a disconnection state between the shaft portion 72 and the outer portion C1-2a as the second gear. By adopting this configuration, the recording device 1 of this embodiment can reduce the space occupied by the first switching unit, second switching unit, etc. within the medium conveying device and can simplify their configurations.

[0073] In the recording device 1 of this embodiment, the gear ratio between the outer part C1-1a as the first gear and the transport roller pair 21 as the first rotating body is equal to the gear ratio between the outer part C1-2a as the second gear and the transport roller pair 31 as the second rotating body. The recording device 1 of this embodiment is configured in this way, and by matching the gear ratio and rotating the first gear and second gear at a constant speed, it is possible to prevent bending of the medium P and friction between the medium P and the rotating body.

[0074] In other words, in the recording device 1 of this embodiment, the transport roller pair 21 as the first rotating body and the transport roller pair 31 as the second rotating body rotate at the same speed when the switching unit 75 is in the transmitting state as shown in FIG. 8. By configuring the recording device 1 of this embodiment in this way, it is possible to prevent bending of the medium P and friction between the medium P and the rotating body. In other words, the method of rotating the transport roller pair 21 as the first rotating body and the transport roller pair 31 as the second rotating body at the same speed is not limited to the configuration of matching the gear ratio described above.

[0075] The recording device 1 of this embodiment also includes a housing 53 that can accommodate a first rotating body such as the transport roller pair 20, 21, and 22, a second rotating body such as the transport roller pair 30 and 31, a first gear train A as a first drive unit, a second gear train B as a second drive unit, and an operation unit 70. In the recording device 1 of this embodiment, the transport roller pair 30 and 31, which is the second rotating body, is an ejection roller that ejects the medium P from the housing 53. With this configuration, the recording device 1 of this embodiment can achieve both improved productivity and improved alignment of the ejected medium P by driving the ejection roller separately from the first rotating body. While there is a risk of issues when removing a medium P that has stopped between the first rotating body such as the transport roller pair 20, 21, and 22 and the second rotating body such as the transport roller pair 30 and 31, the medium P can be easily removed as described above.

[0076] The destination of the medium P may be any configuration, such as a stacker provided inside the housing 53, a stacker provided on the side of the housing 53, or a separate device such as a finisher or relay unit that performs post-processing on the recorded medium P. There are also no particular limitations on the discharge speed of the medium P, and it may be faster or slower than the transport speed in the medium transport path.

[0077] The recording device 1 of this embodiment also includes a protrusion unit 100 having a first rotating body such as the transport roller pairs 20, 21, and 22, a second rotating body such as the transport roller pairs 30 and 31, a first gear train A as a first drive unit, a second gear train B as a second drive unit, and an operation unit 70. The recording device 1 also includes a housing 53 capable of housing the protrusion unit 100 therein, and is configured to be able to move between a housed state in which the protrusion unit 100 is housed in the housing 53 and a protruding state in which the protrusion unit 100 protrudes from the housing 53. The input unit 71 is configured to be exposed from the housing 53 when the protrusion unit 100 as a displacement unit is in the protruding state.

[0078] The transported medium P may jam at various locations along the medium transport path, but the recording device 1 of this embodiment is configured as described above, so that the operation unit 70 can be exposed to the outside of the housing 53 when the protruding unit 100 is in a protruding state from the housing 53, making it easier to remove jammed medium P, for example. The protruding unit 100 may be configured to change between the housed state and the protruding state automatically, or may be configured to be manually performed by the user.

[0079] As described above, the recording device 1 of this embodiment includes a control unit 9, which can control the motor M2 and other components serving as the second drive source. The recording device 1 of this embodiment also includes an operation panel (not shown) and a receiver 9A (see FIG. 1) that can be connected to an external device, such as an external computer, and that can receive a drive force setting for the motor M2 from the operation panel or the external device. This configuration of the recording device 1 of this embodiment allows the drive force of the second drive source, i.e., the speed of the second rotating body, to be specified, improving usability. The speed of the second rotating body may be specified based on drive force, rotational speed, or by selecting from several options.

[0080] Here, the receiving unit 9A can receive an instruction to reset the designated driving force of the motor M2, which is the second driving source. With this configuration, the driving force of the second driving source, i.e., the speed of the second rotating body, can be reset, improving usability. Note that such an instruction can also be received from an operation panel or external device (not shown). The reset method may be to return to the initial value or to a predetermined setting value for resetting.

[0081] The recording apparatus 1 of this embodiment can also be described as including a medium transport device having the above-described medium transport path, and a recording head 8 as a recording unit that performs recording on the medium P transported by the medium transport device. The medium transport device includes a feed path (cassette feed locus S1, additional cassette feed locus S2, manual feed path S3) that feeds the medium P to the recording head 8, a reversal path R3 that turns the medium P recorded by the recording head 8 upside down and merges with the feed path, and a first discharge path (face-up discharge locus T1, finisher discharge locus T3) that discharges the medium P recorded by the recording head 8. A motor M1 as a first drive source drives reversal path rotors such as transport roller pairs 27, 28, and 29 located on the reversal path R3. A second rotor, transport roller pair 30 and 31, is located on the first discharge path.

[0082] With this configuration, the recording device 1 of this embodiment can record on a medium P transported by a medium transport device that can easily remove a medium P that has stopped between rotators of different drive sources. In the recording device 1 of this embodiment, the first discharge path corresponds to the face-up discharge locus T1 and the finisher discharge locus T3, but the first discharge path may also correspond to the face-down discharge locus T2. Furthermore, the configuration may be such that not all of the transport roller pairs on the reversing path R3 are driven by the first drive source, or that only some of the transport roller pairs on the reversing path R3 are driven by the first drive source.

[0083] Furthermore, in the recording device 1 of this embodiment, the face-up discharge trajectory T1 and the finisher discharge trajectory T3, which serve as the first discharge path, are discharge paths that discharge the medium P recorded by the recording head 8 without curving it. Here, the medium conveying device, which is the recording device 1 of this embodiment, further has a face-down discharge trajectory T2, which branches off from the first discharge path and serves as a second discharge path that curves and discharges the medium P recorded by the recording head 8. The conveying roller pair 21, which serves as the first rotating body, and the conveying roller pairs 30 and 31, which serve as the second rotating body, are located on the first discharge path. Furthermore, the motor M1, which serves as the first drive source, drives the conveying roller pairs 22, 23, and 24 and the discharge roller pair 25, which serve as second discharge path rotating bodies and are located on the face-down discharge trajectory T2, which serves as the second discharge path.

[0084] As described above, the recording device 1 of this embodiment is equipped with a second discharge path in addition to the first discharge path. The recording device 1 of this embodiment is configured to easily remove medium P that has stopped between rotators of different drive sources not only on the first discharge path but also on the second discharge path. Since the first rotator only needs to be located somewhere along the path of the face-down discharge trajectory T2, the discharge roller pair 25, which is the final roller of the face-down discharge trajectory T2, may be driven separately from the motor M1 serving as the first drive source.

[0085] The present invention is not limited to the embodiments and modifications described above, and various modifications are possible within the scope of the invention described in the claims, and it goes without saying that these modifications are also included within the scope of the present invention. [Explanation of symbols]

[0086] 1...recording device (medium conveying device), 4...output tray, 6...opening / closing cover, 7...face-up output tray, 7a...rotating shaft, 8...recording head (recording unit), 9...control unit, 9A...receiving unit, 10A...medium cassette (medium storage unit), 11...hopper, 11a...shaft, 12...feed roller, 13...separation roller pair, 14...transport roller pair, 15...feed roller, 16...separation roller, 17...registration roller pair, 18...belt unit, 20...transport roller pair (first rotating body), 21...transport roller pair (first rotating body), 22...transport roller pair (first rotating body, second output path rotating body) ), 23... conveyance roller pair (second discharge path rotor), 24... conveyance roller pair (second discharge path rotor), 25... discharge roller pair (second discharge path rotor), 26... conveyance roller pair, 27... conveyance roller pair (reverse path rotor), 28... conveyance roller pair (reverse path rotor), 29... conveyance roller pair (reverse path rotor), 30... conveyance roller pair (second rotor, discharge roller), 31... conveyance roller pair (second rotor, discharge roller), 35... apparatus main body, 36... discharge mechanism section, 41... manual feed tray, 41a... oscillation shaft, 53... housing, 70... operation section, 71... input section, 72... shaft section , 73...shaft portion, 75...switching portion, 81...belt, 82...belt, 100...protruding unit (displacement portion), 181...electrostatic attraction belt, 182...driving roller, 183...driven roller, A...first gear train (first driving portion), A0...gear, A1...gear, A2...gear, A3...gear, A4...gear, A5...gear, A6...gear, A7...gear, B...second gear train (second driving portion), B1...gear, B2...gear, B3...gear, B4...gear, C...third gear train, C1-1...gear (first switching portion), C1-1a...outer portion (first gear), C1-1b...inner portion, C1-2...gear (second switching portion), C1-2 a...outer part (second gear), C1-2b...inner part, C2-1...gear, C2-2...gear, C3...gear, M1...motor (first drive unit), M2...motor (second drive unit), P...medium, R1...recording transport path, R2...switchback path, R3...reversal path, R4...face-down ejection path, R5...face-up ejection path, S1...cassette feed path, S2...additional cassette feed path, S3...manual feed path, T1...face-up ejection path (first ejection path), T2...face-down ejection path (second ejection path), T3...finisher ejection path (first ejection path)

Claims

1. a first rotating body that rotates in contact with the medium to transport the medium in a transport direction; a second rotating body that rotates in contact with the medium transported by the first rotating body and transports the medium in the transport direction, downstream of the first rotating body in the transport direction; a first drive unit that drives the first rotating body by a driving force of a first drive source; a second drive unit that drives the second rotating body by a driving force of a second drive source; an operation unit connected to the first driving unit and the second driving unit and capable of manually operating the first rotating body and the second rotating body; Equipped with The operation unit includes: an input unit that allows manual input of an operating force; a switching unit that can switch between a transmission state in which drive is transmitted between the input unit and the first drive unit and the second drive unit, and a disconnection state in which drive is not transmitted between the input unit and the first drive unit and the second drive unit; and The switching unit is a first switching unit connected to the first driving unit and a second switching unit connected to the second driving unit; The disconnected state is established when a driving force is input from the first driving source or the second driving source, the transmission state is assumed when no driving force is input from the first driving source or the second driving source and an operating force is input to the input unit; A medium transport device characterized by:

2. 2. The medium transport device according to claim 1, The first rotating body and the second rotating body are configured to rotate in a first rotation direction to transport the medium downstream in the transport direction, and to be rotatable only in the first rotation direction when the operating force is input to the input unit. A medium transport device characterized by:

3. 3. The medium transport device according to claim 2, The first switching unit and the second switching unit are one-way clutches. A medium transport device characterized by:

4. 2. The medium transport device according to claim 1, The first switching unit and the second switching unit are provided coaxially with the input unit. A medium transport device characterized by:

5. 5. The medium transport device according to claim 4, the operation unit has a shaft unit that rotates integrally with the input unit, the first drive unit has a first gear that rotates around the shaft unit, the second drive unit has a second gear that rotates around the shaft unit, the first switching unit is a one-way clutch that switches between the transmission state and the disengagement state between the shaft portion and the first gear, the second switching unit is a one-way clutch that switches between the transmission state and the disengagement state between the shaft portion and the second gear. A medium transport device characterized by:

6. 6. The medium transport device according to claim 5, a gear ratio between the first gear and the first rotating body is equal to a gear ratio between the second gear and the second rotating body; A medium transport device characterized by:

7. 2. The medium transport device according to claim 1, The first rotating body and the second rotating body rotate at the same speed when the switching unit is in the transmitted state. A medium transport device characterized by:

8. 2. The medium transport device according to claim 1, a housing capable of accommodating the first rotating body, the second rotating body, the first driving unit, the second driving unit, and the operation unit; the second rotating body is an ejection roller that ejects the medium from the housing; A medium transport device characterized by:

9. 2. The medium transport device according to claim 1, a housing capable of accommodating the first rotating body, the second rotating body, the first driving unit, the second driving unit, and the operation unit; a displacement unit that can displace the first rotating body, the second rotating body, the first driving unit, the second driving unit, and the operation unit between a housed state in which they are housed in the housing and a protruding state in which they protrude from the housing; Furthermore, The input unit is exposed from the housing in the protruding state. A medium transport device characterized by:

10. 2. The medium transport device according to claim 1, a control unit that controls the second drive source; a receiving unit that receives a designation of the driving force of the second driving source; Further provided with A medium transport device characterized by:

11. The medium transport device according to claim 10, the receiving unit is capable of receiving an instruction to reset the designation of the driving force of the second driving source; A medium transport device characterized by:

12. a medium transport device according to any one of claims 1 to 11; a recording unit that records on the medium transported by the medium transport device; Equipped with The medium transport device is a feeding path for feeding the medium to the recording unit; a reversing path that reverses the medium recorded by the recording unit and merges with the feeding path; a first ejection path for ejecting the medium recorded by the recording unit; and the first drive source drives a reversing path rotor located on the reversing path, The second rotating body is located in the first discharge path. A recording device characterized by:

13. 13. The recording apparatus according to claim 12, the first ejection path is an ejection path that ejects the medium recorded by the recording unit without bending the medium, the medium transport device further includes a second discharge path that branches off from the first discharge path and curves and discharges the medium that has been recorded by the recording unit; the first rotating body and the second rotating body are located in the first discharge path, the first drive source drives a second discharge path rotor located in the second discharge path; A recording device characterized by:

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