Media transfer device

Abstract

To solve the problem that a mechanism on a door side becomes complicated and the weight of a door increases, making it difficult to open and close the door.SOLUTION: A conveyance part 30 includes a first roller 36, a second roller 38, a first rotary shaft 37, a second rotary shaft 39, a support unit 70, a device body 12, a door 42, and a third rotary shaft 41. The second roller 38 nips paper P together with the first roller 36. The first rotary shaft 37 rotatably supports the first roller 36. The second rotary shaft 39 rotatably supports the second roller 38. The support unit 70 supports the first rotary shaft 37. The device body 12 supports the support unit 70. The third rotary shaft 41 rotates the door 42. When the door 42 is opened, the support unit 70 moves the first rotary shaft 37 toward a retracted position. The retracted position of the first rotary shaft 37 is farther than a nip position with respect to the first roller 36 at the nip position.SELECTED DRAWING: Figure 12

Description

Technical Field

[0001] The present invention relates to a medium conveyance device.

Background Art

[0002] In the sheet conveyance device of Patent Document 1, an openable and closable door holds one roller of a pair of conveyance rollers, and the device main body holds the other roller. When the door is opened, a locking mechanism interlocked with the opening operation of the door causes one roller to separate from the other roller, thereby releasing the pressure contact state of the two rollers.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the sheet conveyance device of Patent Document 1, since the part holding one roller is moved integrally with the door, the mechanism on the door side becomes complicated and the weight of the door increases, which may make it difficult to open and close the door.

Means for Solving the Problems

[0005] To solve the above problems, the media conveyance device according to the present invention includes a first roller for conveying a media, a second roller that nips the media together with the first roller at a nip position, a first rotating shaft that rotatably supports the first roller, a second rotating shaft that rotatably supports the second roller, a support mechanism portion that supports the first rotating shaft, a device body that supports the support mechanism portion, a door that opens and closes with respect to the device body, and a third rotating shaft that intersects the first rotating shaft and rotates the door between a closed position of the closed door and an open position of the opened door. The support mechanism portion moves the first rotating shaft from the nip position to a retracted position when the door rotates from the closed position toward the open position, and the retracted position is located farther from the nip position than the first roller at the nip position.

Brief Description of the Drawings

[0006]

Figure 1

Figure 2

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Figure 8

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Figure 10

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Figure 12

Figure 13

Figure 14

Mode for Carrying Out the Invention

[0007] Hereinafter, the present invention will be schematically described. A medium conveyance device according to a first aspect includes a first roller for conveying a medium, a second roller that nips the medium together with the first roller at a nip position, a first rotation shaft that rotatably supports the first roller, a second rotation shaft that rotatably supports the second roller, a support mechanism portion that supports the first rotation shaft, a device main body that supports the support mechanism portion, a door that opens and closes with respect to the device main body, and a third rotation shaft that intersects the first rotation shaft and rotates the door between a closed position of the closed door and an open position of the opened door. The support mechanism portion moves the first rotation shaft from the nip position to a retracted position when the door rotates from the closed position toward the open position, and the retracted position is located at a position farther from the nip position than the first roller at the nip position. According to this aspect, when the door is opened by the rotation of the third rotation shaft, the support mechanism portion moves the first rotation shaft from the nip position to the retracted position, so that the nip state between the first roller and the second roller can be released. Furthermore, since the support mechanism unit for releasing the nip is on the apparatus main body side, the mechanism on the door side is simplified and the door can be lightened.

[0008] The media transport device according to the second aspect, in the first aspect, the support mechanism unit includes a first contact portion capable of contacting the door at one end side in the axial direction of the first rotation shaft, and by receiving a force generated by the contact between the first contact portion and the door, a first moving portion that moves an end portion on the one end side of the first rotation shaft, a second contact portion capable of contacting the door at the other end side in the axial direction of the first rotation shaft, and by receiving a force generated by the contact between the second contact portion and the door, a second moving portion that moves an end portion on the other end side of the first rotation shaft. According to this aspect, the first moving portion and the first contact portion are disposed on the one end side in the axial direction of the first rotation shaft, and the second moving portion and the second contact portion are disposed on the other end side in the axial direction of the first rotation shaft. Thus, since there is no mechanism for moving the first rotation shaft at the central portion in the axial direction of the first rotation shaft, other functional components can be disposed at the central portion.

[0009] The media transport device according to the third aspect, in the second aspect, the third rotation shaft is located on the one end side, the first contact portion is moved in the axial direction of the first rotation shaft by contact with the door, and the second contact portion is moved in an intersection direction intersecting both the first rotation shaft and the third rotation shaft by contact with the door. According to this aspect, the door is opened from the closed position in the intersection direction. At the one end side, since the first contact portion is closer to the door than the other end side, the stroke of the movement of the first contact portion in the intersection direction is short. At the other end side, since the second contact portion is farther from the door than the one end side, the stroke of the movement of the second contact portion in the intersection direction is long. Here, on the one end side, the first contact portion is moved in the axial direction rather than in the intersecting direction. The stroke of the first contact portion in the axial direction can be set longer than the stroke of the first contact portion in the intersecting direction. Thereby, compared with the configuration in which the first contact portion is moved in the intersecting direction, the stroke of the movement of the first contact portion accompanying the opening of the door is ensured, so that even on the one end side where it is difficult to ensure the stroke, the first rotating shaft can be moved. Furthermore, by ensuring the stroke of the first contact portion, it becomes possible to move the first contact portion and the second contact portion evenly from the initial stage of the opening of the door, so that the nip can be released evenly between the one end side and the other end side in the axial direction.

[0010] The medium conveyance device according to the fourth aspect is, in the second aspect or the third aspect, characterized in that the first rotating shaft is integrally configured with a portion that contacts the first moving portion and a portion that contacts the second moving portion. According to this aspect, since both ends of the integrally configured first rotating shaft are moved in a state of contacting the first moving portion and the second moving portion, the posture of the first rotating shaft can be stabilized compared with a configuration in which a plurality of the first rotating shafts are arranged in the axial direction.

[0011] The medium conveyance device according to the fifth aspect is, in any one of the first aspect to the fourth aspect, characterized in that the support mechanism portion includes a rotating member that rotates about a fourth rotating shaft to move the first rotating shaft, the door is provided with a contacted portion that contacts the rotating member at the contact position, and when viewed from the axial direction of the first rotating shaft, the fourth rotating shaft is located between the first rotating shaft and the contact position in the direction in which the third rotating shaft extends. According to this aspect, when the contacted portion of the door contacts the rotating member, the rotating member rotates about the fourth rotating shaft. Thereby, the first rotating shaft is moved. Here, since the fourth rotation axis serving as the fulcrum of the rotating member is located between the contact position serving as the force point of the rotating member and the contact portion between the first rotation axis serving as the point of action of the rotating member and the rotating member in the direction in which the third rotation axis extends, an increase in the movement range of the rotating member is suppressed. Thus, since the first rotation axis is moved by rotational motion, the space required for releasing the nip between the first roller and the second roller can be reduced.

[0012] The medium conveyance device according to the sixth aspect is characterized in that, in any one of the first aspect to the fifth aspect, the support mechanism unit includes a pressing spring that presses the first roller toward the second roller. According to this aspect, when the pressing spring is elastically deformed, the returning force acts on the first roller as a pressing force. As a result, the first roller is pressed toward the second roller. In this way, by pressing the first roller toward the second roller, the nip pressure between the first roller and the second roller can be ensured.

[0013] The medium conveyance device according to the seventh aspect is characterized in that, in the sixth aspect, the support mechanism unit supports the first rotation axis at positions on both outer sides of the pressing spring in the axial direction of the first rotation axis, and the first rotation axis is in a curved state in which the central portion in the axial direction of the first rotation axis is closer to the second roller than both end portions. According to this aspect, the nip pressure between the first roller and the second roller is high at the central portion in the axial direction and low at both end portions. Here, when the medium is in a jam state at the nip position and the central portion in the axial direction of the medium is grasped and taken out, the load acting on both end portions in the axial direction of the medium is small, so that the medium being taken out is prevented from being torn. That is, it is possible to suppress a part of the medium in the jam state from remaining at the nip position.

[0014] The media conveyance device according to the eighth aspect, in any one of the first aspect to the seventh aspect, is characterized in that the device main body or the support mechanism section rotatably supports the second rotation shaft. According to this aspect, regardless of the presence or absence of nip release, both the first roller and the second roller are supported by the device main body or the support mechanism section. As a result, compared with a configuration in which the first roller remains on the device main body and the second roller separates together with the door in nip release, when nip formation is performed again, displacement between the first roller and the second roller is suppressed, so that the positional accuracy of the second roller can be maintained regardless of the opening and closing of the door.

[0015] The media conveyance device according to the ninth aspect, in any one of the first aspect to the eighth aspect, is provided with a drive source, the second roller is a drive roller that rotates by receiving a driving force from the drive source, and the first roller is a driven roller that rotates in accordance with the rotation of the second roller. According to this aspect, since the driven roller is moved in nip release, it is not necessary to displace the drive transmission mechanism that transmits the drive from the drive source. Thereby, the mechanism of the media conveyance device can be simplified.

[0016] In the tenth aspect, the media conveyance device according to the ninth aspect, when viewed from the axial direction of the first rotating shaft, includes an annular conveyance path along which the media is conveyed, a switchback path that is connected to the annular conveyance path, where the front and back of the media conveyed from the annular conveyance path are reversed and the media is conveyed back to the annular conveyance path. The annular conveyance path includes a double-sided path having a feeding path along which the media is fed toward the switchback path and a discharging path along which the media is discharged from the switchback path, and a supply path along which the media is supplied from a confluence point where the discharging paths merge toward a branching point where the media branches into the feeding path. A recording unit provided in the device main body and performing recording on the media is disposed opposite to the supply path. The first roller and the recording unit are disposed outside the annular conveyance path, and the second roller is disposed inside the annular conveyance path. At least a part of the double-sided path is provided in the door. According to this aspect, since at least a part of the double-sided path is provided in the door, when the door is opened, the media can be removed from the double-sided path or maintenance of the double-sided path can be performed on the door side. As a result, compared to a configuration in which the double-sided path is provided on the device main body side, it is easier to remove the media from the double-sided path or perform maintenance on the double-sided path.

[0017] In the eleventh aspect, the media conveyance device according to the tenth aspect is characterized in that the recording unit performs recording on the media by discharging a liquid, and the second roller is a toothed roller having a plurality of teeth formed on the outer peripheral surface. According to this aspect, when double-sided printing is performed, since the second roller is disposed inside the annular conveyance path, the second roller contacts the unrecorded surface of the media or the first printed surface of the media. Here, since the second roller is the toothed roller, the contact area between the medium and the second roller is reduced compared to a configuration in which the entire outer peripheral surface of the second roller contacts the medium. Therefore, it is possible to suppress the liquid adhering to the first printing surface from being transferred to the outer peripheral surface of the second roller.

[0018] Hereinafter, a transport unit 30 as an example of a medium transport device according to the present invention and a printer 10 as an example of a printing device will be specifically described. As shown in FIG. 1, the printer 10 is configured as an inkjet device that performs recording by discharging ink Q, which is an example of a liquid, onto a sheet P, which is an example of a medium. The X - Y - Z coordinate system shown in each figure is a rectangular coordinate system. The X direction is the device width direction when viewed from the operator of the printer 10 and is the horizontal direction. The direction toward the left in the X direction is the +X direction, and the direction toward the right is the -X direction. The Y direction is the width direction intersecting the transport direction of the sheet P and is the device depth direction, and is the horizontal direction. The direction toward the front in the Y direction is the +Y direction, and the direction toward the back is the -Y direction. The Z direction is an example of the device height direction and is the vertical direction. The upward direction in the Z direction is the +Z direction, and the downward direction is the -Z direction.

[0019] In the printer 10, the sheet P is transported through a transport path T represented by a dashed line. Since the transport direction of the sheet P is along the transport path T, it is different at each part of the transport path T. The printer 10 includes a device main body 12, a transport unit 30 described later, and a line head 28. The apparatus main body 12 includes a housing that serves as an outer shell. A discharge unit 13 including a space where the printed paper P is discharged is formed in the +Z direction from the center of the apparatus main body 12 in the Z direction. The apparatus main body 12 is provided with a plurality of paper cassettes 14. An opening 12A that opens in the X direction is formed at the -X direction end of the apparatus main body 12. In the open state of the opening 12A, a conveyance path T described later is exposed. A part of the apparatus main body 12 also serves as the apparatus main body of a conveyance unit 30 described later as an example. The apparatus main body 12 supports a support unit 70 described later.

[0020] The plurality of paper cassettes 14 store the paper P. The paper P stored in the paper cassette 14 is conveyed along the conveyance path T by a pick-up roller 16 and conveyance roller pairs 17 and 18. The conveyance path T merges a conveyance path T1 through which the paper P is conveyed from an external device (not shown) and a conveyance path T2 through which the paper P is conveyed from a manual feed tray 19 provided in the apparatus main body 12 via a feed roller pair 26. A portion in the -X direction from the center in the X direction of the printer 10 is configured as a conveyance unit 30 as an example of a conveyance device that conveys the paper P. Details of the conveyance unit 30 will be described later.

[0021] The conveyance path T is arranged with two pulleys 21, a conveyance belt 22 wound around the two pulleys 21, a plurality of conveyance roller pairs 24 that convey the paper P, a plurality of flaps 25 that switch the path along which the paper P is conveyed, and a media width sensor 20 that detects the width of the paper P in the Y direction. The conveyance path T includes a discharge path T3, a feed path T4, a switchback path TB, a delivery path T5, and a supply path TS.

[0022] The discharge path T3 is a path leading from the supply path TS to the discharge unit 13. The feed path T4 is a path through which the paper P is fed from the supply path TS toward the switchback path TB. The delivery path T5 is a path through which the paper P is sent out from the switchback path TB and connected to the supply path TS. The feed path T4 and the delivery path T5 together are referred to as a duplex path TM. The switchback path TB is a path connected to the annular conveyance path TR described later, and as an example, it extends in the +Z direction. In the switchback path TB, the front and back of the sheet P conveyed from the annular conveyance path TR are reversed, and the sheet P is conveyed to the annular conveyance path TR.

[0023] The supply path TS is a path through which the sheet P is supplied toward a branch point B where the supply path TS branches from a confluence point A where the delivery path T5 merges into the feeding path T4. The annular conveyance path TR includes a duplex path TM and a supply path TS. A part of the duplex path TM is provided on a door 42 described later. Thus, as viewed from the Y direction, the conveyance unit 30 is provided with an annular conveyance path TR through which the sheet P is conveyed and a switchback path TB.

[0024] The apparatus main body 12 is provided with an ink tank 27 that stores ink Q, a line head 28, and a control unit 29 that controls the operations of each part of the printer 10. The line head 28 is located downstream of the media width sensor 20 in the conveyance direction of the sheet P and is disposed opposite to the supply path TS. Further, the line head 28 is an example of a recording unit, and performs recording by discharging the ink Q supplied from the ink tank 27 onto the sheet P conveyed by the conveyance unit 30. The control unit 29 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and a storage (not shown), and controls the conveyance of the sheet P in the printer 10 and the operations of each part including the line head 28 and the conveyance unit 30.

[0025] As shown in FIG. 5, in the conveyance path T, a curved path R is formed upstream of the media width sensor 20. The curved path R is formed as a path having a set of crest portions and trough portions. Specifically, the curved path R includes an introduction path R1 that curves from the pair of conveying rollers 18 toward positions in the +X direction and the +Z direction, a descending path R2 that curves while descending from the +X-direction end of the introduction path R1 toward positions in the +X direction and the -Z direction, and an ascending path R3 that curves while ascending from the +X-direction end of the descending path R2 toward positions in the +X direction and the +Z direction.

[0026] The descending path R2 is a path along which the sheet P is conveyed downward in the +Z direction. The ascending path R3 is disposed downstream of the descending path R2 in the conveyance direction of the sheet P. Also, the ascending path R3 is a path along which the sheet P is conveyed upward in the Z direction. The descending path R2 and the ascending path R3 are formed by an upper guide portion 34 and a lower guide portion 32, which will be described later. The descending path R2 and the ascending path R3 included in the conveyance path T overlap in a range ZA in the Z direction.

[0027] As shown in FIG. 2, the conveyance unit 30 includes, as an example, a first roller 36, a second roller 38, a first rotating shaft 37, a second rotating shaft 39, a support unit 70, an apparatus main body 12, a door 42, and a third rotating shaft 41 (FIG. 4). In the conveyance unit 30, each part provided in the apparatus main body 12 is collectively referred to as a lower guide portion 32. Also, each part provided in the door 42 is collectively referred to as an upper guide portion 34.

[0028] As shown in FIG. 3, the door 42 is formed in a plate shape having a predetermined thickness. The door 42 can open and close the conveyance path T by opening or closing the opening 12A as it rotates. In other words, the door 42 is rotatable between an open position where the conveyance path T is exposed and a closed position where the conveyance path T is hidden. The door 42 constitutes a part of the outer shell of the apparatus main body 12 in the closed position. The door 42 is provided with a contacted member 53 (FIG. 8) and a contacted member 56 (FIG. 7), which will be described later.

[0029] As shown in FIG. 2, the lower guide portion 32 has a first roller 36, a second roller 38, a first rotating shaft 37, a second rotating shaft 39, and a support unit 70. Further, the lower guide portion 32 has a guide member 44, an upstream roller 45A, and a downstream roller 46A. The upstream roller 45A forms a nip with the upstream roller 45B of the upper guide portion 34. The downstream roller 46A forms a nip with the downstream roller 46B of the upper guide portion 34. The guide member 44 includes a shaft portion 44A extending in the Y direction and a main body portion 44B rotatable about the shaft portion 44A. The guide member 44 forms a descending path R2 in a state where the door 42 is closed, and retracts from the descending path R2 as the door 42 is opened. The upstream roller 45A is provided on the main body portion 44B. The downstream roller 46A is provided on the shaft portion 44A.

[0030] The upper guide portion 34 includes a pair of conveying rollers 24, a pair of feeding rollers 26, an upstream roller 45B, and a downstream roller 46B. Further, the upper guide portion 34 is attached to the door 42, and is provided so as to be movable outward with respect to the apparatus main body 12 together with the door 42. Further, the upper guide portion 34 is positioned above each of the descending path R2 and the ascending path R3 in the Z direction in a state of being housed in the apparatus main body 12.

[0031] As shown in FIG. 8, the upper guide portion 34 has a main body member 46. The main body member 46 includes a bottom wall 47 curved so as to be convex in the -Z direction, a side wall 48 standing upright at the -Y direction end of the bottom wall 47, and a side wall 49 (FIG. 7) standing upright at the -Y direction end of the bottom wall 47. The side wall 48 and the side wall 49 are penetrated by a columnar shaft portion 52 extending in the Y direction. The +Y direction end of the shaft portion 52 protrudes in the +Y direction from the side wall 48. The -Y direction end of the shaft portion 52 protrudes in the -Y direction from the side wall 49. The shaft portion 52 is not rotated as an example. At the -Y direction end of the shaft portion 52, a contacted member 53 is fixed. The contacted member 53 is a block-shaped member formed in an L shape when viewed from the -Y direction. At the -Y direction end of the contacted member 53, a contact surface 54 is formed. The contact surface 54 is, for example, a plane along the X-Z plane. The contacted member 53 is an example of a contacted portion, and contacts the first contact member 82 described later at the contact position.

[0032] As shown in FIG. 7, at the +Y direction end of the shaft portion 52, a contacted member 56 is fixed. The contacted member 56 is a block-shaped member extending from the shaft portion 52 toward the +X direction and +Z direction positions when viewed from the +Y direction. At the +X direction end of the contacted member 56, a contact surface 57 is formed. The contact surface 57 is, for example, a plane along the Y-Z plane. Thus, the contact surface 54 (FIG. 8) is arranged to be able to contact in the -Y direction, while the contact surface 57 is arranged to be able to contact in the +X direction. The contacted member 56 is an example of a contacted portion, and contacts the second contact member 104 described later at the contact position. In this embodiment, the contacted member 53 and the contacted member 56 are included in the door 42 (FIG. 2).

[0033] As shown in FIG. 4, the door 42 is provided via a hinge portion 43 at the -Y direction end of the opening 12A at the -X direction end of the apparatus main body 12. The hinge portion 43 includes a third rotation shaft 41. The third rotation shaft 41 is formed in a columnar shape and extends in the Z direction. The third rotation shaft 41 is provided closer to the -Y direction end among the -X direction ends of the apparatus main body 12. In other words, the third rotation shaft 41 is located on one end side in the Y direction. The third rotation shaft 41 intersects the first rotation shaft 37 described later when viewed from the X direction. The third rotation shaft 41 rotates the door 42 between the closed position of the closed door 42 and the open position of the opened door 42. Thus, the door 42 opens and closes the opening 12A and the conveyance path T with respect to the apparatus main body 12.

[0034] As shown in FIG. 5, when viewed from the +Y direction, the first roller 36 and the line head 28 are arranged outside the annular conveyance path TR. The second roller 38 is arranged inside the annular conveyance path TR. The second roller 38 nips the sheet P together with the first roller 36 at the nip position N. The first roller 36 and the second roller 38 are used for conveying the sheet P.

[0035] As shown in FIG. 9, the conveyance unit 30 is provided with a motor 61 as an example of a drive source. The second rotating shaft 39 extends in the Y direction and rotatably supports the second roller 38. Both end portions of the second rotating shaft 39 in the Y direction are rotatably supported by bearings 62. The bearings 62 are attached to a unit body 72 of a support unit 70 described later. That is, in the present embodiment, the support unit 70 rotatably supports the second rotating shaft 39. Since the support unit 70 is supported by the apparatus main body 12 (FIG. 2), the second rotating shaft 39 is indirectly supported by the apparatus main body 12. The second roller 38 is an example of a drive roller and a toothed roller, and rotates by receiving a driving force from the motor 61. The second roller 38 has an outer peripheral surface 38A. A plurality of teeth 38B are formed on the outer peripheral surface 38A. Each tooth 38B is formed in a trapezoidal shape when viewed from the Y direction.

[0036] The first rotating shaft 37 extends in the Y direction and rotatably supports the first roller 36. Both end portions of the first rotating shaft 37 in the Y direction are rotatably supported by bearings 64. The bearings 64 are attached to the unit body 72. That is, in the present embodiment, the unit body 72 rotatably supports the first rotating shaft 37 and the second rotating shaft 39. Since the support unit 70 is supported by the apparatus main body 12, the first rotating shaft 37 and the second rotating shaft 39 are indirectly supported by the apparatus main body 12. The +Y-direction end of the first rotation shaft 37 has an outer peripheral portion 37A that contacts an arm portion 112C (Fig. 7) described later. The -Y-direction end of the first rotation shaft 37 has an outer peripheral portion 37B that contacts an arm portion 102C (Fig. 8) described later. That is, the first rotation shaft 37 has the outer peripheral portion 37A and the outer peripheral portion 37B integrally formed. The first roller 36 is an example of a driven roller and rotates as the second roller 38 rotates.

[0037] As shown in Fig. 7, the support unit 70 is an example of a support mechanism unit and supports the first rotation shaft 37 and the second rotation shaft 39. Further, when the door 42 (Fig. 2) rotates from the closed position toward the open position, the support unit 70 moves the first rotation shaft 37 from the nip position N (Fig. 5) toward the retracted position. The retracted position of the first rotation shaft 37 is at a position farther in the +X direction than the nip position N with respect to the first roller 36 at the nip position N.

[0038] As shown in Fig. 6, the support unit 70 includes, as an example, a unit main body 72, a first contact member 82, a tension spring 92, a conversion member 94, a first torsion spring 102, a second contact member 104, a second torsion spring 112, and a pressing spring 114 (Fig. 9). The unit main body 72 is composed of a plurality of members that are long in the Y direction. The +Y direction with respect to the center of the unit main body 72 in the Y direction is referred to as the front side, and the -Y direction is referred to as the rear side. The rear side is an example of one end side in the axial direction of the first rotation shaft 37. The front side is an example of the other end side in the axial direction of the first rotation shaft 37.

[0039] A slit portion 73 is formed at the rear side end of the unit main body 72. The slit portion 73 partially penetrates the unit main body 72 in the X direction and extends in the Y direction. Also, a pair of support walls 74 are provided at a portion in the +Z direction from the slit portion 73 on the rear side of the unit main body 72. The pair of support walls 74 are arranged at intervals in the Y direction. Through holes penetrating in the Y direction are formed in the support walls 74. In the +Z direction with respect to the support wall 74, a regulating plate 75 (Fig. 10) is formed. The regulating plate 75 has a predetermined thickness in the Z direction and projects in the +X direction from the unit body 72. At the front end of the unit body 72, a pair of support walls 76 are provided. The pair of support walls 76 are arranged at intervals in the Y direction. Through holes penetrating in the Y direction are formed in the support walls 76. A hole portion 77 penetrating in the X direction is formed between the pair of support walls 76 in the unit body 72.

[0040] As shown in Fig. 10, the first contact member 82 is an example of the first contact portion and can contact the contacted member 53 on the rear side. The first contact member 82 is moved in the Y direction, which is the axial direction of the first rotation axis 37, by contact with the contacted member 53 in the Y direction. Specifically, the first contact member 82 includes a base portion 83, a lever portion 84, a step portion 86, a flange portion 87, a slope portion 88, and a hook portion 89.

[0041] The base portion 83 is formed in a plate shape having a predetermined thickness in the Z direction and extends in the Y direction. The base portion 83 is inserted into the slit portion 73 and is movable in the Y direction with respect to the unit body 72. The lever portion 84 extends in the -X direction from the -Y direction end of the base portion 83. The lever portion 84 is arranged offset in the +Z direction with respect to the base portion 83. For this reason, a step portion 86 is formed between the +X direction end of the lever portion 84 and the -Y direction end of the base portion 83. The lever portion 84 is formed in a rectangular parallelepiped shape. A contact surface 85 is formed at the +Y direction end of the lever portion 84. The contact surface 85 is a plane along the X-Z plane and contacts the contacted surface 54 in the +Y direction.

[0042] The flange portion 87 projects in the +X direction from a portion in the +Y direction rather than the center in the Y direction at the +X direction end of the base portion 83. The slope portion 88 is formed at the +X-direction end of the base portion 83, at the -Y-direction and -Z-direction ends rather than at the center in the Y direction. The slope portion 88 has, as an example, a first side surface 88A, an inclined surface 88B, and a second side surface 88C. The first side surface 88A is a plane along the Y-Z plane. The inclined surface 88B extends obliquely from the +Y-direction end of the first side surface 88A toward a position in the +X-direction and +Y-direction. The second side surface 88C is a plane along the Y-Z plane and extends from the +Y-direction end of the inclined surface 88B toward the flange portion 87. Thus, the second side surface 88C is positioned in the +X direction with respect to the first side surface 88A. The engaging portion 89 protrudes in the -Z direction at the +Y-direction end of the slope portion 88. The engaging portion 92 is formed in a U shape that opens in the -Y direction when viewed from the X direction.

[0043] The tension spring 92 is arranged to be elastically deformable along the Y direction. The +Y-direction end of the tension spring 92 is attached to the unit body 72. The -Y-direction end of the tension spring 92 is hooked on the engaging portion 89. Thereby, a tensile force in the +Y direction acts on the first contact member 82. When the first contact member 82 does not contact the contact surface 54, it is at a position where the length of the tension spring 92 is the natural length. And when the first contact member 82 contacts the contact surface 54 and is pressed in the -Y direction, it is moved in the -Y direction. Note that the position displacement of the first contact member 82 in the X direction is regulated by a guide portion (not shown), and it is moved along the Y direction.

[0044] The conversion member 94 has, as an example, a support shaft portion 95, a first extension portion 96, a second extension portion 97, and a regulation portion 98. The support shaft portion 95 extends in the Y direction. Both ends of the support shaft portion 95 in the Y direction are rotatably supported by the support wall 74. The first extension portion 96 extends in a direction orthogonal to the Y direction at a portion in the +Y direction from the center of the support shaft portion 95. The first extension portion 96 is positioned in the -Z direction with respect to the support shaft portion 95. Also, the first extension portion 96 is at a position where it can contact the slope portion 88. The second extending portion 97 extends in a direction orthogonal to the Y direction at a portion in the -Y direction from the center of the support shaft portion 95. The second extending portion 97 is located in the +Z direction with respect to the support shaft portion 95. The restricting portion 98 is formed at the +Z-direction end portion and the +Y-direction end portion of the second extending portion 97. The restricting portion 98 is formed in a U shape that opens in the +Y direction when viewed from the X direction. The restricting portion 98 restricts excessive rotation of the conversion member 94 by coming into contact with the restricting plate 75. That is, the rotation range of the conversion member 94 is restricted.

[0045] The first torsion spring 102 is an example of the first moving portion, and by receiving the force generated by the contact between the first contact member 82 and the contacted member 53, it moves the rear end portion of the first rotation shaft 37 in the +X direction. Specifically, the first torsion spring 102 has a cylindrical winding portion 102A, an arm portion 102B (FIG. 8) extending from one end in the -Y direction of the winding portion 102A, an arm portion 102C extending from the other end in the +Y direction of the winding portion 102A, and a bent portion 102D. The winding portion 102A has the end portion in the -Y direction of the support shaft portion 95 inserted therein and is supported by the support shaft portion 95. The winding portion 102A faces the step portion 86.

[0046] As shown in FIG. 8, the arm portion 102B extends linearly from the winding portion 102A along the unit main body 72. The arm portion 102B is fixed to the unit main body 72. The arm portion 102C is brought into contact with the -X-direction end portion of the second extending portion 97. In other words, the conversion member 94 receives a clockwise rotational force when viewed from the -Y direction due to the contact of the arm portion 102C. The bent portion 102D is formed at the end portion of the arm portion 102C and extends from the arm portion 102C toward the positions in the +X direction and the +Z direction.

[0047] As shown in FIG. 7, the second contact member 104 is an example of the second contact portion and the rotating member, and can contact the contacted member 56 on the front side. When the second contact member 104 contacts the contacted member 56, it rotates in the clockwise direction when viewed from the +Y direction. In other words, when the second contact member 104 contacts the contacted member 56, it moves in the intersecting direction that intersects both the first rotation axis 37 and the third rotation axis 41 (FIG. 4). Note that the position where the second contact member 104 contacts the contacted member 56 is defined as the contact position C. Specifically, the second contact member 104 includes a fourth rotation axis 105, a first extending portion 106, and a second extending portion 108, and rotates about the fourth rotation axis 105.

[0048] The fourth rotation axis 105 extends in the Y direction. Both end portions of the fourth rotation axis 105 in the Y direction are rotatably supported by a support wall 76 (FIG. 6). Also, when viewed from the Y direction, the fourth rotation axis 105 is located between the first rotation axis 37 and the aforementioned contact position C in the Z direction in which the third rotation axis 41 (FIG. 4) extends. In other words, the fourth rotation axis 105 is located in a region between an imaginary line (not shown) along the X direction passing through the rotation center of the first rotation axis 37 and an imaginary line (not shown) along the X direction passing through the center of the contact position C.

[0049] The first extending portion 106 extends in a direction orthogonal to the Y direction at a portion in the +Y direction from the center of the fourth rotation axis 105. The first extending portion 106 is located in the -Z direction with respect to the fourth rotation axis 105. Also, the first extending portion 106 is at a position where it can contact the contacted member 56. The tip of the first extending portion 106 is bent in the -Z direction. Here, at the tip of the first extending portion 106, the surface that contacts the contacted member 56 is defined as the contact surface 106A. The second extending portion 108 extends in a direction orthogonal to the Y direction at a portion in the -Y direction from the center of the fourth rotation axis 105. The second extending portion 108 is located in the +Z direction with respect to the fourth rotation axis 105. The second extending portion 108 and the first extending portion 106 are arranged in an L shape when viewed from the Y direction.

[0050] The second torsion spring 112 is an example of the second moving part, and by receiving the force generated by the contact between the second contact member 104 and the contacted member 56, it moves the front end of the first rotation axis 37 in the +X direction. Specifically, the second torsion spring 112 has a cylindrical winding part 112A, an arm part 112B extending from one end of the winding part 112A in the +Y direction, an arm part 112C extending from the other end of the winding part 112A in the -Y direction, and a bent part 112D. The arm part 112C contacts the first rotation axis 37 and moves the first rotation axis 37 in the +X direction. The winding part 112A has the end of the fourth rotation axis 105 in the +Y direction inserted therein and is supported by the fourth rotation axis 105.

[0051] As shown in FIG. 9, the support unit 70 includes a pressing spring 114 that presses the first roller 36 toward the second roller 38. One end of the pressing spring 114 is attached to the unit body 72, and the other end presses the central portion of the first rotation axis 37 in the Y direction in the -X direction. As a result, the first roller 36 is pressed toward the second roller 38. The unit body 72 supports the first rotation axis 37 at positions on both outer sides of the pressing spring 114 in the Y direction. The first rotation axis 37 receives a pressing force from the pressing spring 114, and the central portion of the first rotation axis 37 in the Y direction becomes a curved state closer to the second roller 38 than both ends. In FIG. 9, the degree of curvature of the first rotation axis 37 is enlarged to clearly show the curved state of the first rotation axis 37.

[0052] Next, the operations of the conveyance unit 30 and the printer 10 will be described. As shown in FIGS. 10, 11, 12, and 14, when the door 42 is opened in the closed state of the opening 12A by the door 42, on the rear side, the contacted member 53 moves away from the first contact member 82 in the +Y direction, so that the first contact member 82 moves in the +Y direction under the tensile force of the tension spring 92. At this time, the first extending portion 96 moves from the second side surface 88C to the first side surface 88A along the slope portion 88. As a result, the conversion member 94 is rotated in the clockwise direction when viewed from the -Y direction to the +Y direction. Due to the clockwise rotation of the conversion member 94, the arm portion 102C contacts the -Y direction end portion of the first rotation shaft 37 and presses the -Y direction end portion of the first rotation shaft 37 in the +X direction.

[0053] As shown in FIGS. 10, 11, 12, and 13, when the door 42 is opened, on the front side, the contacted member 56 moves away from the second contact member 104, so that the second contact member 104 is rotated in the counterclockwise direction when viewed from the +Y direction to the -Y direction. Due to the counterclockwise rotation of the second contact member 104, the arm portion 112C contacts the +Y direction end portion of the first rotation shaft 37 and presses the +Y direction end portion of the first rotation shaft 37 in the +X direction. In this way, both end portions of the first rotation shaft 37 in the Y direction are pressed in the +X direction, so that the first roller 36 is retracted from the second roller 38.

[0054] When the door 42 is rotated from the open state to the closed state, on the front side, the second contact member 104 contacts the contacted member 56 and is rotated in the clockwise direction. As a result, the arm portion 112C is retracted from the first rotation shaft 37. On the rear side, the first contact member 82 contacts the contacted member 53, so that the conversion member 94 is rotated in the counterclockwise direction. As a result, the arm portion 102C is retracted from the first rotation shaft 37. When the arm portions 112C and 102C are retracted, the first rotation shaft 37 receives a pressing force from the pressing spring 114. As a result, the first roller 36 contacts the second roller 38 to form a nip.

[0055] As described above, according to the conveying unit 30, when the door 42 is opened by the rotation of the third rotating shaft 41, the support unit 70 moves the first rotating shaft 37 from the nip position to the retracted position, thereby releasing the nip state between the first roller 36 and the second roller 38. Furthermore, since the support unit 70 for releasing the nip is on the apparatus main body 12 side, the mechanism on the door 42 side can be simplified and the door 42 can be lightened.

[0056] According to the conveying unit 30, a first torsion spring 102 and a first contact member 82 are arranged on one end side of the first rotating shaft 37 in the Y direction, and a second torsion spring 112 and a second contact member 104 are arranged on the other end side of the first rotating shaft 37 in the Y direction. In this way, since there is no mechanism for moving the first rotating shaft 37 at the central portion of the first rotating shaft 37 in the Y direction, other functional components can be arranged at the central portion. According to the conveying unit 30, the door 42 is opened from the closed position in the intersecting direction. On one end side in the Y direction, since the first contact member 82 and the door 42 are closer to each other than on the other end side, the stroke of the movement of the first contact member 82 in the intersecting direction is short. On the other end side, since the second contact member 104 and the door 42 are farther apart from each other than on the one end side, the stroke of the movement of the second contact member 104 in the intersecting direction is long. Here, on the one end side, the first contact member 82 is moved in the Y direction rather than in the intersecting direction. The stroke of the first contact member 82 in the Y direction can be set longer than the stroke of the first contact member 82 in the intersecting direction. Thereby, compared with the configuration in which the first contact member 82 is moved in the intersecting direction, the stroke of the movement of the first contact member 82 accompanying the opening of the door 42 is ensured, so that the first rotating shaft 37 can be moved even on the one end side where it is difficult to ensure the stroke. Furthermore, by ensuring the stroke of the first contact member 82, it becomes possible to move the first contact member 82 and the second contact member 104 evenly from the initial stage of the opening of the door 42, so that the nip between the first roller 36 and the second roller 38 can be released evenly on one end side and the other end side in the Y direction.

[0057] According to the conveying unit 30, since both end portions of the integrally formed first rotating shaft 37 in the Y direction are moved while being in contact with the first torsion spring 102 and the second torsion spring 112, the posture of the first rotating shaft 37 can be stabilized as compared with a configuration in which a plurality of first rotating shafts 37 are arranged in the Y direction. According to the conveying unit 30, when the contact member 56 of the door 42 comes into contact with the second contact member 104, the second contact member 104 is rotated about the fourth rotating shaft 105. As a result, the first rotating shaft 37 is moved. Here, since the fourth rotating shaft 105 serving as the fulcrum of the second contact member 104 is located between the contact position serving as the force point of the second contact member 104 and the contact portion between the first rotating shaft 37 serving as the acting point of the second contact member 104 and the second contact member 104 in the direction in which the third rotating shaft 41 extends, an increase in the movement range of the second contact member 104 is suppressed. In this way, since the first rotating shaft 37 is moved by rotational motion, the space required for releasing the nip between the first roller 36 and the second roller 38 can be reduced.

[0058] According to the conveying unit 30, when the pressing spring 114 is elastically deformed, the returning force acts on the first roller 36 as a pressing force. As a result, the first roller 36 is pressed toward the second roller 38. In this way, by pressing the first roller 36 toward the second roller 38, the nip pressure between the first roller 36 and the second roller 38 can be ensured. According to the conveying unit 30, the nip pressure between the first roller 36 and the second roller 38 is high at the central portion in the Y direction and low at both end portions. Here, when the sheet P is jammed at the nip position and the central portion of the sheet P in the Y direction is grasped and taken out, since the load acting on both end portions of the sheet P in the Y direction is small, breakage of the medium during the taking-out is suppressed. That is, it is possible to suppress a part of the jammed sheet P from remaining at the nip position.

[0059] According to the conveying unit 30, regardless of whether nip release is performed, both the first roller 36 and the second roller 38 are supported by the apparatus main body 12 or the support unit 70. As a result, compared to a configuration in which the first roller 36 remains in the apparatus main body 12 and the second roller 38 separates together with the door 42 during nip release, displacement between the first roller 36 and the second roller 38 when nip formation is performed again is suppressed, so that the positional accuracy of the second roller 38 can be maintained regardless of the opening and closing of the door 42. According to the conveying unit 30, since the first roller 36 as a driven roller is moved during nip release, it is not necessary to displace the drive transmission mechanism that transmits the drive from the motor 61. Thereby, the mechanism of the conveying unit 30 can be simplified.

[0060] According to the conveying unit 30, since at least a part of the duplex path TM is provided in the door 42, when the door 42 is opened, removal of the sheet P from the duplex path TM or maintenance of the duplex path TM can be performed on the door 42 side. Thereby, compared to a configuration in which the duplex path TM is provided on the apparatus main body 12 side, it is possible to facilitate removal of the sheet P from the duplex path TM or maintenance of the duplex path TM. According to the conveying unit 30, when double-sided printing is performed on the sheet P, since the second roller 38 is disposed inside the annular conveying path TR, the second roller 38 contacts the unrecorded surface of the sheet P or the first printed surface of the sheet P. Here, since the second roller 38 is a toothed roller, the contact area between the sheet P and the second roller 38 is reduced compared to a configuration in which the entire outer peripheral surface of the second roller 38 contacts the sheet P, so that the ink Q attached to the first printed surface is transferred to the outer peripheral surface of the second roller 38 can be suppressed. According to the printer 10, the actions and effects of the conveying unit 30 can be obtained.

[0061] The conveying unit 30 and the printer 10 according to the embodiment of the present invention are basically configured as described above, but it is of course possible to make partial configuration changes, omissions, etc. without departing from the gist of the present invention.

[0062] In printer 10, the medium is not limited to paper P and may be a film. The recording unit is not limited to the line head 28 and may be configured to have a serial head that reciprocates in the width direction of the paper P. The device height direction may be a direction intersecting the vertical direction.

[0063] In printer 10, the support unit 70 may have only one of the first contact member 82 and the first torsion spring 102, and the second contact member 104 and the second torsion spring 112. That is, the first rotating shaft 37 may be moved only on one side in the Y direction of the first rotating shaft 37. Note that the first contact portion and the first moving portion may be integrated, and the second contact portion and the second moving portion may be integrated.

[0064] In printer 10, a rotating member may be provided instead of the first contact member 82 and the conversion member 94. The first rotating shaft 37 may have a portion in contact with the first torsion spring 102 and a portion in contact with the second torsion spring 112 as separate bodies. In other words, the first rotating shaft 37 may be composed of two rotating shafts arranged in the Y direction. The fourth rotating shaft 105 may be located outside the range from the first rotating shaft 37 to the contact position C in the Z direction.

[0065] In printer 10, the support unit 70 may not include the pressing spring 114. The first rotating shaft 37 may be in a curved state in which both end portions in the Y direction of the first rotating shaft 37 approach the second roller 38 more than the central portion. Also, the first rotating shaft 37 may not be curved. The apparatus main body 12 may rotatably support the second rotating shaft 39. Alternatively, the door 42 may rotatably support the second rotating shaft 39. Using the first roller 36 as a driving roller, the first roller 36 may be moved in the X direction using a planetary gear or the like.

[0066] In printer 10, the annular conveyance path TR and the switchback path TB may not be provided, and only one-sided printing may be performed on the paper P. All of the double-sided path TM may be provided on the door 42. The second roller 38 may be a roller other than a toothed roller, for example, a roller having a circular cross section.

Description of Reference Numerals

[0067] 10…Printer, 12…Apparatus main body, 12A…Opening, 13…Discharge part, 14…Paper cassette, 16…Pickup roller, 17…Pair of conveyance rollers, 18…Pair of conveyance rollers, 19…Manual feed tray, 20…Media width sensor, 21…Pulley, 22…Conveyor belt, 24…Pair of conveyance rollers, 25…Flap, 26…Pair of feed rollers, 27…Ink tank, 28…Line head, 29…Control unit, 30…Conveyance unit, 32…Lower guide part, 34…Upper guide part, 36…First roller, 37…First rotation shaft, 37A…Outer peripheral part, 37B…Outer peripheral part, 38…Second roller, 38A…Outer peripheral surface, 39B…Tooth, 39…Second rotation shaft, 41…Third rotation shaft, 42…Door, 43…Hinge part, 44…Guide member, 44A…Shaft part, 44B…Main body part, 45A…Upstream roller, 45B…Upstream roller, 46…Main body member, 46A…Downstream roller, 46B…Downstream roller, 47…Bottom wall, 48…Side wall, 49…Side wall, 52…Shaft part, 53…Contacted member, 54…Contact surface, 56…Contacted member, 57…Contact surface, 61…Motor, 62…Bearing, 64…Bearing, 70…Support unit, 72…Unit main body, 73…Slit part, 74…Support wall, 75…Regulating plate, 76…Support wall, 77…Hole part, 82…First contact part, 83…Base part, 84…Lever part, 85…Contact surface, 86…Step part, 87…Flange part, 88…Slope part, 88A…First side surface, 88B…Inclined surface, 88C…Second side surface, 89…Hooking part, 92…Hooking part, 94…Conversion member, 95... spindle portion, 96... first extending portion, 97... second extending portion, 98... restricting portion, 102... first torsion spring, 102A... winding portion, 102B... arm portion, 102C... arm portion, 102D... bent portion, 104... second contact member, 105... fourth rotating shaft, 106... first extending portion, 106A... contact surface, 108... second extending portion, 112... second torsion spring, 112A... winding portion, 112B... arm portion, 112C... arm portion, 112D... bent portion, A... confluence point, B... branch point, C... contact position, N... nip position, P... paper, Q... ink, R... curved path, R1... introduction path, R2... descending path, R3... ascending path, T... conveyance path, T1... conveyance route, T2... conveyance route, T3... discharge path, T4... feeding path, T5... delivery path, TB... switchback path, TM... duplex path, TR... annular conveyance path, ZA... range

Claims

1. A first roller for conveying a medium, a second roller that nips the medium together with the first roller at a nip position, a first rotating shaft that rotatably supports the first roller, a second rotating shaft that rotatably supports the second roller, a support mechanism portion that supports the first rotating shaft, a device body that supports the support mechanism portion, a door that opens and closes with respect to the device body, a third rotating shaft that extends in a direction orthogonal to the first rotating shaft and rotates the door between a closed position of the closed door and an open position of the opened door, comprising, when the door rotates from the closed position toward the open position, the support mechanism portion moves the first rotating shaft from the nip position toward a retracted position, the retracted position is a position farther from the nip position than the first roller at the nip position, the support mechanism portion includes a rotating member that moves the first rotating shaft by being rotated about a fourth rotating shaft, the door is provided with a contacted portion that contacts the rotating member at a contact position, when viewed from the axial direction of the first rotating shaft, the fourth rotating shaft is positioned between the first rotating shaft and the contact position in the direction in which the third rotating shaft extends, a medium conveying device characterized by the above.

2. A first roller for conveying a medium, a second roller that nips the medium together with the first roller at a nip position, a first rotating shaft that rotatably supports the first roller, a second rotating shaft that rotatably supports the second roller, a support mechanism portion that supports the first rotating shaft, a device body that supports the support mechanism portion, a door that opens and closes with respect to the device body, a third rotating shaft that extends in a direction orthogonal to the first rotating shaft and rotates the door between a closed position of the closed door and an open position of the opened door, comprising, when the door rotates from the closed position toward the open position, the support mechanism portion moves the first rotating shaft from the nip position toward a retracted position, the retracted position is a position farther from the nip position than the first roller at the nip position, the support mechanism portion rotatably supports the second rotating shaft, a medium conveying device characterized by the above.

3. A first roller for conveying a medium, a second roller that nips the medium together with the first roller at a nip position, A first rotating shaft that rotatably supports the first roller; A second rotating shaft that rotatably supports the second roller; A support mechanism portion that supports the first rotating shaft; An apparatus main body that supports the support mechanism portion; A door that opens and closes with respect to the apparatus main body; A third rotating shaft that extends in a direction orthogonal to the first rotating shaft, and that rotates the door between a closed position of the closed door and an open position of the opened door; Comprising; When the door rotates from the closed position toward the open position, the support mechanism portion moves the first rotating shaft from the nip position toward a retracted position; The retracted position is at a position farther from the nip position than the first roller at the nip position; An annular conveyance path through which the medium is conveyed, as viewed from the axial direction of the first rotating shaft, and a switchback path that is connected to the annular conveyance path, where the front and back of the medium conveyed from the annular conveyance path are reversed and the medium is conveyed back to the annular conveyance path, are provided; The annular conveyance path is; A duplex path having a feed path through which the medium is fed toward the switchback path and a delivery path through which the medium is delivered from the switchback path; A supply path through which the medium is supplied toward a branch point that branches from a confluence point where the delivery paths merge toward the feed path; Comprising; A recording unit that is provided in the apparatus main body and performs recording on the medium is disposed opposite to the supply path; The first roller and the recording unit are disposed outside the annular conveyance path; The second roller is disposed inside the annular conveyance path; At least a part of the duplex path is provided on the door; A medium conveyance apparatus, characterized by the above.

4. In the medium conveyance apparatus according to any one of Claims 1 to 3, The support mechanism portion is; A first contact portion that can contact the door at one end side in the axial direction of the first rotating shaft; A first moving portion that moves an end portion of the one end side of the first rotating shaft by receiving a force generated by contact between the first contact portion and the door; A second contact portion that can contact the door at the other end side in the axial direction of the first rotating shaft; A second moving portion that moves an end portion of the other end side of the first rotating shaft by receiving a force generated by contact between the second contact portion and the door; Comprising; A medium conveyance apparatus, characterized by the above.

5. In the medium conveyance apparatus according to Claim 4, The third rotation axis is located on the one end side, The first contact portion is moved in the axial direction of the first rotation axis by contact with the door, The second contact portion is moved in a direction orthogonal to both the axial direction of the first rotation axis and the axial direction of the third rotation axis by contact with the door, A media conveyance device characterized by the above.

6. In the media conveyance device according to claim 4 or claim 5, The first rotation axis is integrally configured with a portion that contacts the first moving portion and a portion that contacts the second moving portion, A media conveyance device characterized by the above.

7. In the media conveyance device according to claim 4, The support mechanism portion is rotated about a fourth rotation axis so that the second contact portion becomes a rotating member and moves the first rotation axis, The door is provided with a contacted portion that contacts the rotating member at the contact position, When viewed from the axial direction of the first rotation axis, the fourth rotation axis is located between the first rotation axis and the contact position in the direction in which the third rotation axis extends, A media conveyance device characterized by the above.

8. In the media conveyance device according to any one of claims 1 to 7, The support mechanism portion includes a pressing spring that presses the first roller toward the second roller, A media conveyance device characterized by the above.

9. In the media conveyance device according to claim 8, The support mechanism portion supports the first rotation axis at positions on both outer sides of the pressing spring in the axial direction of the first rotation axis, The first rotation axis is in a curved state in which the central portion in the axial direction of the first rotation axis approaches the second roller more than both end portions, A media conveyance device characterized by the above.

10. In the media conveyance device according to any one of claims 1, 2, and 4 to 9, The device body or the support mechanism portion rotatably supports the second rotation axis, A media conveyance device characterized by the above.

11. In the media conveyance device according to any one of claims 1 to 10, A drive source is provided, The second roller is a drive roller that rotates by receiving a driving force from the drive source, The first roller is a driven roller that rotates along with the rotation of the second roller, A media conveyance device characterized by the above.

12. In the media conveyance device according to claim 11, As viewed from the axial direction of the first rotating shaft, an annular conveyance path through which the medium is conveyed, and a switchback path that is connected to the annular conveyance path, where the front and back of the medium conveyed from the annular conveyance path are reversed and the medium is conveyed back to the annular conveyance path, are provided. The annular conveyance path is a double-sided path having a feeding path through which the medium is fed toward the switchback path and a discharging path through which the medium is discharged from the switchback path. It also includes a supply path through which the medium is supplied from a confluence point where the discharging paths merge toward a branch point where the medium branches off to the feeding path. The apparatus is provided with a recording unit provided in the apparatus main body and performing recording on the medium, which is disposed opposite to the supply path. The first roller and the recording unit are disposed outside the annular conveyance path. The second roller is disposed inside the annular conveyance path. At least a part of the double-sided path is provided on the door. A medium conveyance apparatus characterized by the above.

13. In the medium conveyance apparatus according to claim 12, the recording unit performs recording on the medium by discharging liquid. The second roller is a toothed roller having a plurality of teeth formed on its outer peripheral surface. A medium conveyance apparatus characterized by the above.

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