Media transport device

Abstract

To solve the problem in which: when there are members that are brought into engagement by a closing operation of a door other than a lock mechanism section, an over-stroke closing operation performed on the door may cause the members in engagement to interfere with each other.SOLUTION: A printer 10 comprises: an apparatus body 12; an inner door unit 60; a body gear 42 and a transmission gear 44; and a lock mechanism section 100. The lock mechanism section 100 locks the inner door unit 60 against the apparatus body 12 and unlocks the inner door unit 60 from the apparatus body 12. The lock mechanism section 100 includes a shaft to be engaged 55 that is long in a Y-direction, a lock lever 102 that has an engagement surface 108 engageable with the shaft to be engaged 55, and a tension spring 122 that applies force to the lock lever 102 to allow the engagement surface 108 to be displaced from a first posture to a second posture. In a closing operation, the engagement surface 108 is displaced to the second posture while shifting a position of contact G with the shaft to be engaged 55, and applies, to the shaft to be engaged 55, lead-in force for moving the inner door unit 60 to a closed position.SELECTED DRAWING: Figure 8

Description

[Technical field]

[0001] The present invention relates to a media transport device. [Background technology]

[0002] The sheet conveying device of Patent Document 1 locks the door to the device body by engaging a hook member provided on the door with a hook shaft provided on the device body in the horizontal direction. The contact surface of the hook member and the hook shaft is aligned vertically. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2017-53930 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the sheet conveying device of Patent Document 1, when the contact surface is brought into contact with the hook shaft, an extra overstroke is required from when the hook member passes over the hook shaft until it comes into contact with the hook shaft, because the contact surface is aligned vertically. Here, in a configuration in which the device body is closed by closing the door, if there are other parts other than the locking mechanism that are engaged by the closing action of the door, there is a risk that the engaged parts will interfere with each other when an over-stroke closing action is performed to lock the door. [Means for solving the problem]

[0005] In order to solve the above problem, a medium transport device according to the present invention includes a device main body in which a medium is transported, a door rotatably connected to the device main body about a rotation axis and switchable between an open state and a closed state, a plurality of rotors that are separated from each other in the open state and contact each other in the closed state to transmit a driving force, and a locking mechanism that locks the door to the device main body to set the door to the closed state and unlocks the door from the device main body to set the door to the open state, the engaging portion having an engaging surface displaceable between a first position and a second position in a second direction intersecting the first direction, the engaging surface being capable of engaging with the engaged portion; and an applying member that applies a force to the engaging portion such that the engaging surface is displaceable from the first position to the second position, wherein when the door is operated to close, the engaging surface is displaced from the first position to the second position while changing a contact position with the engaged portion, and applies a retracting force to the engaged portion during the closing operation and in the closed state to move the door to a closed position. [Brief description of the drawings]

[0006] [Figure 1] FIG. 1 is a schematic diagram illustrating the internal configuration of a printer according to an embodiment. [Diagram 2] FIG. 1 is a perspective view showing the overall configuration of a printer according to an embodiment. [Diagram 3] FIG. 2 is a front view showing an inner door unit of the printer according to the embodiment. [Figure 4] FIG. 1 is a perspective view showing a state in which a pinch roller and a rubber roller of a printer according to an embodiment come into contact with each other. [Diagram 5] FIG. 1 is a perspective view showing a state in which a main body gear and a gear of a gear unit of a printer according to an embodiment are meshed with each other. [Figure 6] FIG. 1 is a perspective view showing a contact state between a gear unit and a main body bracket of a printer according to an embodiment. [Figure 7] FIG. 11 is a perspective view illustrating a state in which a gear unit of the printer according to the embodiment is separated from a main body bracket. [Figure 8]FIG. 2 is a vertical cross-sectional view of the inner door unit of the printer according to the embodiment, as viewed from the side. [Figure 9] FIG. 4 is a side view showing a lock lever of the printer according to the embodiment. [Figure 10] FIG. 1 is an oblique view illustrating a state in which the middle door unit is attached to a main body bracket of the printer according to an embodiment. [Figure 11] FIG. 1 is a perspective view showing an arrangement of a lock lever and a support bracket of a printer according to an embodiment. [Figure 12A] FIG. 11 is a schematic diagram illustrating a state in which the leading surface of the lock lever and the engaged shaft of the printer according to the embodiment come into contact with each other. [Figure 12B] FIG. 11 is a schematic diagram illustrating a state when the lock lever of the printer according to the embodiment passes over the engaged shaft. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0007] The present invention will now be briefly described. A medium conveying device according to a first aspect includes a device main body in which a medium is conveyed, a door rotatably connected to the device main body about a rotation axis and switchable between an open state and a closed state, a plurality of rotating bodies that are separated from each other in the open state and contact each other in the closed state to transmit a driving force, and a locking mechanism that locks the door to the device main body to set the door to the closed state and unlocks the door from the device main body to set the door to the open state, the locking mechanism having an engaged portion that is long in a first direction, The door includes an engaging portion having an engaging surface displaceable between a first position and a second position in a second direction intersecting a first direction, the engaging surface being capable of engaging with the engaged portion, and an applying member that applies a force to the engaging portion so that the engaging surface is displaceable from the first position to the second position, wherein when the door is operated to close, the engaging surface is displaced from the first position to the second position while changing a contact position with the engaged portion, and applies a retracting force to the engaged portion during the closing operation and in the closed state to move the door to a closed position. According to this aspect, when the door is operated from the open position to the closed position, the engaging surface comes into contact with the engaged portion. The engaging surface changes its posture from the first posture to the second posture as the door approaches the closed position. Here, when the posture of the engaging surface changes from the first posture to the second posture, the engaging surface changes posture while changing the contact position with the engaged portion. In other words, since the posture of the engaging surface changes while the engaging surface and the engaged portion remain in contact with each other, there is no need to overstroke the engaging portion. Furthermore, since it is no longer necessary to overstroke the engaging portion, interference between the multiple rotating bodies can be suppressed.

[0008] The medium transport device according to a second aspect is the medium transport device of the first aspect, characterized in that the engagement portion has a rotation center axis relative to the door. According to this aspect, the rotation center axis of the engagement portion is not moved, which makes it possible to simplify the mechanism for moving the engagement portion compared to a configuration in which the entire engagement portion slides.

[0009] A media conveying device according to a third aspect is characterized in that, in the second aspect, the engagement portion has a leading surface that contacts the engaged portion before the engagement surface when the state of the door changes from the open state to the closed state, and when the leading surface contacts the engaged portion, the engagement portion receives a reaction force from the engaged portion in a rotational direction from the second position to the first position. According to this aspect, the leading surface comes into contact with the engaged portion, and the engaging portion is rotated in the direction from the second posture to the first posture, and then the engaging surface and the engaged portion transition to a contact state. In other words, the engaging portion is more likely to be rotated before the engaging surface and the engaged portion come into contact with each other, and therefore the engaging surface and the engaged portion are more likely to transition to a contact state.

[0010] The medium conveying device according to a fourth aspect is the medium conveying device according to the second or third aspect, characterized in that in the closed state, the rotation central axis is perpendicular to the rotation axis. According to the present aspect, when the door is moved from the open state to the closed state, the contact area between the engaging surface and the engaged portion gradually increases and the frictional force acting on the engaging surface also gradually increases, compared to a configuration in which the engaging portion slides, thereby reducing the feeling of catching when the door is moved to the closed state.

[0011] The medium conveying device of the fifth aspect is characterized in that, in any one of the second to fourth aspects, the contact position between the engagement surface and the engaged portion in the closed state is located below the rotation center axis in the device height direction. According to this aspect, since the center of rotation of the engaging portion is located higher in the device height direction than the contact position between the engaging surface and the engaged portion, when the lock is released, the engaging surface is more likely to be moved in a direction away from the engaged portion, making it easier to release the lock.

[0012] The media conveying device of the sixth aspect is any one of the second to fifth aspects, characterized in that the engaging portion is provided on one of the device body and the door, and the engaged portion and a regulating portion that regulates movement of the door are provided on the other of the device body and the door, and in the closed state, the engaged portion is located in a position that overlaps with the regulating portion in the device height direction. According to this aspect, the restricting portion restricts the movement of the door in the closed state. Here, since the engaged portion is located at a position overlapping with the restricting portion in the device height direction, the contact position between the engagement surface and the engaged portion and the restriction position of the door by the restricting portion are arranged close to each other, so that it is possible to prevent the door from being operated in an overstroke when the engagement surface and the engaged portion come into contact with each other.

[0013] The medium conveying device of the seventh aspect is characterized in that, in any one of the second to sixth aspects, the engagement surface in the second posture extends on both sides of the contact position with the engaged portion when viewed in the axial direction of the rotation center axis. According to this aspect, even if the contact position between the engagement surface and the contacted portion shifts, the engagement surface extends on both sides of the contact position, so that the engagement surface and the contacted portion can come into contact with each other.

[0014] The medium conveying device of the eighth aspect is characterized in that, in the seventh aspect, the engagement surface is an inclined surface extending in an intersecting direction that intersects with the device height direction, and the angle formed between the device height direction and the intersecting direction is greater than 0 degrees and less than 45 degrees. According to the present aspect, compared to a configuration in which the angle between the device height direction and the intersecting direction exceeds 45 degrees, the horizontal component of the force acting at the contact position between the engagement surface and the engaged portion, which is perpendicular to the device height direction, is increased, making it easier to ensure the retraction force when the engagement portion comes into contact with the engaged portion.

[0015] The medium conveying device of the ninth aspect is any one of the first to eighth aspects, characterized in that an outer door is provided outside the door relative to the device body, the outer door is rotatably connected to the device body so as to be switchable between an open state and a closed state, and in the closed state, the door in the closed state is pressed against the device body. According to this aspect, by pressing the outer door in a closed state against the apparatus body, the movement of the door to the open position is restricted, so that the door can be maintained in the closed state.

[0016] A media conveying device according to a tenth aspect is characterized in that, in the ninth aspect, one of the door and the outer door is provided with a rotatable roller and an elastically deformable pressing member that presses the roller toward the other of the door and the outer door, and the other of the door and the outer door has a contact portion that comes into contact with the roller. According to this aspect, the roller is pressed against the contact portion by receiving a pressing force from the pressing member while in contact with the contact portion. Here, even if the outer door is operated in an overstroke manner relative to the door, the pressing member absorbs the pressing force acting on the roller from the contact portion by elastically deforming. This makes it possible to suppress deformation of the roller.

[0017] The media transport device of the 11th aspect is characterized in that, in the 10th aspect, a first transport path along which the media is transported is formed between the device body and the door, and a second transport path along which the media is transported by rotation of the roller is formed between the door and the outer door. According to this aspect, even if the medium becomes jammed during transport, it can be removed by opening the door or the outer door, thereby preventing the medium from remaining on the first transport path or the second transport path.

[0018] The medium conveying device according to a twelfth aspect is the eleventh aspect, further comprising a recording unit that performs recording on the medium being conveyed. According to this aspect, the recording unit records on the medium being transported. Even if the medium on which the recording has been performed becomes jammed during transport, the medium can be removed by opening the door or the outer door, so that the medium on which the recording has been performed can be prevented from remaining on the first transport path or the second transport path.

[0019] The following describes in detail a printer 10 as an example of a medium transport device according to the present invention. 1 and 2, the printer 10 is configured as an inkjet recording device that performs recording by ejecting ink Q, which is an example of a liquid, onto paper P, which is an example of a medium. Note that the XYZ coordinate system shown in each figure is a Cartesian coordinate system. The X direction is the device width direction when seen by the operator of the printer 10, and is the horizontal direction. Within the X direction, the direction toward the left is defined as the +X direction, and the direction toward the right is defined as the -X direction. The Y direction is a horizontal direction that is a width direction and a depth direction of the device that intersects with the conveyance direction of the paper P. The direction toward the front of 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 height direction of the device, and is the vertical direction. The upward direction in the Z direction is the +Z direction, and the downward direction is the -Z direction.

[0020] In the printer 10, the paper P is transported through a transport path T indicated by a dashed line. The transport direction in which the paper P is transported is a direction along the transport path T, and therefore differs at each portion of the transport path T. The printer 10, as an example, includes a device main body 12, an ink tank 27, a line head 28, a control unit 29, an outer door unit 30, a rotating unit 40 (FIG. 5), an inner door unit 60, and a locking mechanism unit 100 (FIG. 3).

[0021] The device body 12 includes a housing that serves as an outer shell. In the +Z direction from the center of the device body 12 in the Z direction, a discharge section 13 is formed, which includes a space into which the recorded paper P is discharged. The device body 12 is also provided with a paper cassette 15 that stores the paper P. An opening 12A that opens in the X direction is formed at the end of the device body 12 in the -X direction. When the opening 12A is open, a part of the transport path T is exposed. The device body 12 is configured to include a body frame 14 which is a skeleton member, and a body bracket 45 (FIG. 6) described later which is fixed to the body frame 14. In the device body 12, the paper P is transported along a transport path T.

[0022] The paper P stored in the paper cassette 15 is transported along a transport path T on which a pick roller 16 and transport roller pairs 17, 18, etc. are arranged. The transport path T further includes two pulleys 21, a transport belt 22 wound around the two pulleys 21, a plurality of transport roller pairs 24 that transport the paper P, and a plurality of flaps 25 that switch the path along which the paper P is transported. The conveyor belt 22 faces the line head 28 . The transport roller pair 24 has a transport roller 24A arranged in the -X direction and a transport roller 24B arranged in the +X direction on each path. Specifically, the transport path T includes a main transport path T1, discharge paths T2 and T3, an inlet path T4, a switchback path T5, and an outlet path T6.

[0023] The main transport path T1 extends from the paper cassette 15 to a position opposite the line head . The discharge path T2 is formed between the device body 12 and a middle door unit 60 described later, and extends from the downstream end of the main transport path T1 to the discharge section 13. The discharge path T2 is an example of a first transport path, and the paper P is transported along the discharge path T2. The discharge path T3 branches off from the middle of the discharge path T2 and extends to the discharge portion 13. The feed path T4 is a path along which the paper P is fed from the main transport path T1 toward a switchback path T5, which will be described later.

[0024] The switchback path T5 extends in the +Z direction, for example. On the switchback path T5, the paper P is transported in the +Z direction and the -Z direction by a switchback method. The output path T6 is a path along which the paper P is output from the switchback path T5 and is connected to the main transport path T1. The feed path T4 and the switchback path T5 are an example of a second transport path, and are formed between an inner door unit 60 and an outer door unit 30, which will be described later. In the switchback path T5, the paper P is transported by the rotation of a rubber roller 36 and a pinch roller 94, which will be described later.

[0025] The line head 28 is an example of a recording unit, and performs recording by discharging ink Q supplied from an ink tank 27 onto the paper P being transported. The control unit 29 includes a central processing unit (CPU), read only memory (ROM), random access memory (RAM), and storage (not shown), and controls the transport of paper P in the printer 10 and the operation of each unit including the line head 28.

[0026] 2, the outer door unit 30 is an example of an outer door, and is provided on the -X direction, which is outer than a middle door unit 60 described later, with respect to the device body 12. The outer door unit 30 is rotatably connected to the device body 12 by a hinge portion 32. The hinge portion 32 is provided at the end portion in the -Y direction of the main body frame 14. The hinge portion 32 also has a rotation axis (not shown) along the Z direction. The outer door unit 30 can be switched between an open state in which the opening 12A is opened and a closed state in which the opening 12A is closed by rotating around the rotation axis of the hinge portion 32. Furthermore, in the closed state, the outer door unit 30 presses the inner door unit 60 in the closed state toward the device body 12 in the +X direction.

[0027] The outer door unit 30 is configured to include an outer cover 34 and an outer frame 35, for example. The outer cover 34 is formed in a plate shape having a predetermined thickness, and has a size capable of closing the opening 12A. The outer frame 35 is attached to a surface of the outer cover 34 facing the opening 12A. The outer frame 35 has a lower portion 35A, a central portion 35B, and an upper portion 35C. The lower portion 35A constitutes a portion in the -Z direction from the center in the Z direction of the outer frame 35, and includes the delivery path T6. The central portion 35B constitutes the central portion of the outer frame 35 in the Z direction, and forms an input path T4 together with a middle door unit 60, which will be described later. The upper part 35C constitutes a portion in the +Z direction from the center in the Z direction of the outer frame 35, and forms a switchback path T5 together with the middle door unit 60. In addition, the upper part 35C is provided with a rubber roller 36 (FIG. 1). In other words, the outer door unit 30 has the rubber roller 36.

[0028] 4, the rubber roller 36 is an example of a contact portion, and is provided on an upper portion 35C of the outer frame 35. The rubber roller 36 has a cylindrical shaft portion 37 extending along the Y direction, and expanded diameter portions 38 provided on the shaft portion 37 at intervals in the Y direction and expanded in diameter in the radial direction of the shaft portion 37. The expanded diameter portions 38 are made of a rubber member formed into a cylindrical shape. An outer peripheral surface 38A of the expanded diameter portions 38 protrudes from the outer frame 35 in the +X direction. In a closed state in which the outer door unit 30 closes the opening 12A (FIG. 1), a portion of the outer circumferential surface 38A comes into contact with a pinch roller 94, which will be described later.

[0029] As shown in FIG. 5, the rotating portion 40 includes a main gear 42 and a transmission gear 44, for example. The main gear 42 and the transmission gear 44 are examples of multiple rotating bodies, and are separated from each other when the inner door unit 60 described below is in an open state, and come into contact with each other when the inner door unit 60 is in a closed state, thereby enabling the transmission of driving force. The main body gear 42 is supported by a bracket (not shown) provided on the device body 12 (FIG. 2) so as to be rotatable about the Y direction as an axial direction. In addition, a driving force is transmitted to the main body gear 42 from a motor (not shown) via a gear 43. The transmission gear 44 is provided on a gear portion 84 described later so as to be rotatable about the Y direction as an axial direction. When the middle door unit 60 is in a closed state, the transmission gear 44 meshes with the main body gear 42, enabling the transmission of driving force.

[0030] 6 and 7, the main body bracket 45 is a member fixed to the end of the main body frame 14 (FIG. 1) in the +Y direction. The main body bracket 45 is formed, for example, by bending a metal plate, and has a vertical wall 46, side walls 47 and 48, and a protruding portion 52. The main body bracket 45 is also provided with a first abutment portion 51, a second abutment portion 54, an engaged shaft 55, a damper 56, and a third abutment portion 58.

[0031] The vertical wall 46 extends in the Z direction along the YZ plane. The side wall 47 extends in the -X direction from the -Y end of the vertical wall 46. The side wall 48 extends in the -X direction from the +Y end of the vertical wall 46. In this way, the main body bracket 45 is formed in a U-shape that opens in the -X direction when viewed from the Z direction. The portion of the side wall 47 that is in the +Z direction from the center in the Z direction and is the end in the -X direction is referred to as a first abutment portion 51. The first abutment portion 51 is an example of a regulating portion, and when the middle door unit 60 is in the closed state, it comes into contact with the support shaft portion 74 (Figure 7) described later in the -X direction, thereby regulating excessive movement of the middle door unit 60 in the +X direction.

[0032] The protruding portion 52 is a portion that protrudes in the -Y direction from the end portion in the +X direction at the center portion in the Z direction of the side wall 47. The protruding portion 52 is formed in a plate shape having a predetermined thickness in the X direction. The second abutment portion 54 is a portion that protrudes in the -Y direction from the +X direction end of the +Z direction end of the side wall 48. The second abutment portion 54 is located in the +Z direction relative to the vertical wall 46, and is formed in a plate shape having a predetermined thickness in the X direction. The second abutment portion 54 is an example of a restricting portion, and when the middle door unit 60 is in the closed state, it comes into contact with an abutted portion 92 of the cover member 86 (described later) in the -X direction, thereby restricting excessive movement of the middle door unit 60 in the +X direction.

[0033] The engaged shaft 55 is an example of an engaged portion, and is a cylindrical member that is long in the Y direction as an example of the first direction. The engaged shaft 55 is provided in a position in the +Z direction from the center of the side wall 47 in the Z direction and in a position in the -X direction from the center of the side wall 47 in the X direction. The engaged shaft 55 extends in the -Y direction from the side wall 47. The height position of the engaged shaft 55 in the Z direction is lower than the height position of the second abutment portion 54 in the Z direction. The engaged shaft 55 is included in a locking mechanism 100, which will be described later. When the middle door unit 60 is in a closed state, the engaged shaft 55 is in a position overlapping with the first abutment portion 51 in the Z direction within a range of length L1 (FIG. 7).

[0034] The damper 56 (FIG. 7) is attached to the overhanging portion 52 and extends from the overhanging portion 52 in the -X direction. The damper 56 has, as an example, a contact portion 56A and a spring portion 56B. The contact portion 56A is made of, as an example, a resin member formed in a cylindrical shape extending in the X direction. The end surface of the contact portion 56A in the -X direction is a flat surface along the YZ plane. The contact portion 56A comes into contact with a first restricting plate portion 78 (described later) in the -X direction. The spring portion 56B has one end in the X direction attached to the protruding portion 52 and the other end attached to the contact portion 56A, and is thereby elastically deformable in the X direction. The height position of the damper 56 in the Z direction is lower than the height position of the engaged shaft 55 in the Z direction.

[0035] The third abutment portion 58 is provided at a position in the -Z direction from the center of the side wall 47 in the Z direction and at the end of the side wall 47 in the -X direction. The third abutment portion 58 is formed in a cylindrical shape and extends in the -Y direction from the side wall 47. For example, the diameter of the third abutment portion 58 is larger than the diameter of the engaged shaft 55. For example, the length of the third abutment portion 58 in the Y direction is longer than the length of the engaged shaft 55 in the Y direction. The height position of the third abutment portion 58 in the Z direction is lower than the height position of the damper 56 in the Z direction. In addition, the third abutment portion 58 is an example of a regulating portion, and when the middle door unit 60 is in the closed state, it comes into contact with the guide portion 65 described later in the -X direction, thereby regulating excessive movement of the middle door unit 60 in the +X direction.

[0036] 3, the middle door unit 60 is an example of a door, and is a unit that is rotatably connected to the device body 12 around a rotation axis C1 and is configured to be switchable between an open state and a closed state. Specifically, the middle door unit 60 includes a frame portion 62, a guide portion 65 (FIG. 6), a rotating shaft 61, a support bracket 68, a gear portion 84 (FIG. 5), a cover member 86 (FIG. 7), a pinch roller 94, and a pressing spring 96 (FIG. 4). In the description of the middle door unit 60, the arrangement of each member will be described assuming that the middle door unit 60 is in a position in the closed state.

[0037] The closed state of the middle door unit 60 is a state in which the middle door unit 60 stored in the device main body 12 is locked to the device main body 12 by the locking mechanism part 100 described later, and forms an exhaust path T2 (Figure 1) together with the device main body 12. The open state of the middle door unit 60 is a state in which the lock on the device main body 12 is released and the discharge path T2 is exposed.

[0038] The frame portion 62 is formed in a rectangular shape with a dimension in the Y direction longer than a dimension in the Z direction when viewed from the X direction. The frame portion 62 is configured to include a first frame 63 and a second frame 66, for example. The first frame 63 constitutes the -X direction portion of the frame portion 62. The first frame 63 also has a vertical wall 64 that stands upright along the YZ plane. The vertical wall 64 is provided with a plurality of pinch rollers 94 and a plurality of pressure springs 96, which will be described later. The second frame 66 (FIG. 6) constitutes the +X direction portion of the frame portion 62. The second frame 66 also has a vertical wall 67 that stands upright along the YZ plane. A plurality of transport rollers 24A (FIG. 1) are rotatably provided on the vertical wall 67.

[0039] As shown in FIG. 6, a guide portion 65 is provided at the end of the vertical wall 64 in the +Y direction. The guide portion 65 has a bottom wall 65A along the XY plane, a side wall 65B standing upright in the +Z direction at the -Y end of the bottom wall 65A, a front wall 65C standing upright in the +Z direction at the -X end of the bottom wall 65A, and an upper wall 65D connected to the side wall 65B and the front wall 65C and located in the +Z direction with respect to the bottom wall 65A. In other words, the guide portion 65 is a chamber that opens in the +X and +Y directions. The distance in the Z direction between the bottom wall 65A and the upper wall 65D is enlarged toward the +X direction. The guide portion 65 has a size that allows the third abutment portion 58 to be inserted therein, and guides the third abutment portion 58 in the X direction. The third abutment portion 58 guided by the guide portion 65 abuts against the front wall 65C, and is thereby restricted from moving in the -X direction.

[0040] As shown in Fig. 3, the rotating shaft 61 is provided at the end of the frame portion 62 in the -Y direction. The rotating shaft 61 is formed in a cylindrical shape extending along the Z direction. The rotating shaft 61 is rotatably provided on a part of the main body frame 14. The rotating shaft 61 has a rotation axis C1 passing through the axial center. This allows the middle door unit 60 to be switched between the open state and the closed state described above, centered on the rotation axis C1. The support bracket 68 is attached to the end of the frame portion 62 in the +Y direction by using a screw (not shown).

[0041] As shown in FIG. 7, the support bracket 68 includes a vertical plate portion 69, a horizontal plate portion 71, a support plate portion 72, a support shaft portion 74, a first restricting plate portion 78, a second restricting plate portion 79, and a hook portion 82 (FIG. 6). The vertical plate portion 69 is attached to a -Z direction portion at the +Y direction end of the frame portion 62. The horizontal plate portion 71 extends in the +Y direction from the +Z direction end of the vertical plate portion 69. The support plate portion 72 stands upright in the +Z direction from the end portion in the +Y direction of the horizontal plate portion 71. A plurality of shaft portions 73 extending in the +Y direction are arranged side by side in the Z direction on the support plate portion 72. The plurality of shaft portions 73 rotatably support a gear (not shown) of a gear portion 84 described later. A support shaft portion 74 is provided on the portion of the support plate portion 72 in the +Z direction. The support shaft portion 74 is formed in a cylindrical shape that opens in the Y direction. A part of a shaft 76 (FIG. 8) is fitted into the support shaft portion 74. In other words, the support bracket 68 supports the shaft 76.

[0042] The first restricting plate portion 78 extends in the -Y direction from the center and bottom in the Z direction at the -X direction end portion of the support plate portion 72. The contact portion 56A described above comes into contact with a part of the first restricting plate portion 78. When the contact portion 56A comes into contact with the first restricting plate portion 78, the first restricting plate portion 78 restricts the contact portion 56A from moving beyond the first restricting plate portion 78 in the -X direction. The second restricting plate portion 79 extends in the -Y direction from an upper portion in the Z direction at the -X direction end portion of the support plate portion 72. A front wall portion 111 and a rear wall portion 114 (FIG. 9), which will be described later, come into contact with parts of the second restricting plate portion 79. When the front wall portion 111 comes into contact with the second restricting plate portion 79, the second restricting plate portion 79 restricts the front wall portion 111 from moving in the -X direction beyond the second restricting plate portion 79. When the rear wall portion 114 comes into contact with the second restricting plate portion 79, the second restricting plate portion 79 restricts the rear wall portion 114 from moving in the +X direction beyond the second restricting plate portion 79. The hook portion 82 (FIG. 8) is a portion that protrudes in the +X direction at the -Y direction end of the first restricting plate portion 78. The hook portion 82 is formed in an inverted U shape that opens in the -Z direction. The hook portion 82 is located in the +Z direction with respect to the guide portion 65.

[0043] The gear section 84 has the transmission gear 44 already described, a plurality of transmission gears 84A (FIG. 11), a drive gear 84B, and a plurality of gears not shown. The transmission gear 44 is disposed at an end of the gear section 84 in the -Z direction. The drive gear 84B is disposed at an end of the gear section 84 in the +Z direction. The plurality of gears transmit a drive force from the transmission gear 44 to the drive gear 84B via the plurality of transmission gears 84A.

[0044] The cover member 86 has a first side wall 87, a second side wall 88 and a third side wall 89 (FIG. 5). The first side wall 87 is located in the +X direction relative to the gear portion 84. The second side wall 88 is located in the -X direction relative to the gear portion 84. The third side wall 89 is disposed in the +Y direction relative to the gear portion 84, and connects the first side wall 87 and the second side wall 88 in the X direction. In this manner, the cover member 86 covers the gear portion 84 from three sides. When viewed from the +X direction, an abutment portion 92 is formed in a portion located in the +Y direction and +Z direction relative to the center of the first side wall 87. The abutted portion 92 is a portion that protrudes in the +X direction from the first side wall 87. In addition, the abutted portion 92 is a portion against which the second abutment portion 54 abuts in the -X direction when the middle door unit 60 is in the closed state.

[0045] 4, the pinch roller 94 is an example of a rotatable roller, and has a cylindrical shaft portion 94A extending in the Y direction, an expanded diameter portion 94B expanded radially from the shaft portion 94A, and a plurality of teeth 94C formed on the outer circumferential surface of the expanded diameter portion 94B. In addition, in a state in which the inner door unit 60 receives a pressing force from the outer door unit 30, the pinch roller 94 conveys the paper P by rotating while pinching the paper P together with the rubber roller 36.

[0046] The pressing spring 96 has one end attached to the first frame 63 and the other end in contact with the shaft portion 94A, making it elastically deformable in the X direction. The pressing spring 96 applies elastic force to the shaft portion 94A, thereby pressing the shaft portion 94A toward the rubber roller 36. In other words, the pressing spring 96 is an example of a pressing member, and presses the pinch roller 94 toward the outer door unit 30. Note that a plurality of pinch rollers 94 and a plurality of pressing springs 96 are arranged in the inner door unit 60.

[0047] 6, the locking mechanism 100 locks the middle door unit 60 to the apparatus body 12 to bring it into a closed state, and unlocks the middle door unit 60 from the apparatus body 12 to bring it into an open state. Specifically, the locking mechanism 100 includes the engaged shaft 55 (FIG. 9), the lock lever 102, and the tension spring 122.

[0048] As shown in Fig. 9, the lock lever 102 is an example of an engagement portion, and has an engagement surface 108, which will be described later. The lock lever 102 has the shaft 76 and a lever body 104 that rotates around the axial center of the shaft 76. As already described, the shaft 76 is supported by the support bracket 68 (Fig. 7). In other words, the lock lever 102 is provided on the middle door unit 60 (Fig. 1). The arrangement of each part of the lock lever 102 will be described assuming that the middle door unit 60 is in the closed position.

[0049] The shaft 76 is formed in a cylindrical shape and extends in the Y direction. The shaft 76 has a rotation center axis C2 that passes through the axial center and extends in the Y direction. In other words, the lock lever 102 has a rotation center axis C2 with respect to the inner door unit 60. When the inner door unit 60 is in the closed state, the rotation center axis C2 is perpendicular to the rotation axis C1 (FIG. 3) when viewed from the -X direction to the +X direction. When viewed from the +Y direction, the middle door unit 60 moves in the +X direction from an open position in an open state to a closed position in a closed state.

[0050] As viewed from the +Y direction, the lever body 104 includes an insertion portion 106, a bottom wall 107, an engagement surface 108, a leading surface 112, a connection surface 109, a front wall portion 111, a rear wall portion 114, a partition portion 115, a grip portion 116, and a hook portion 118. In this embodiment, engagement is a concept that includes contact. The insertion portion 106 is a cylindrical portion that opens in the Y direction. The shaft 76 is inserted into the insertion portion 106. The insertion portion 106 is rotatable in the circumferential direction of the shaft 76. The bottom wall 107 extends in the +X direction from the outer circumferential surface of the insertion portion 106. The bottom wall 107 also has a bottom surface 107A along the XY plane.

[0051] The engagement surface 108 is, for example, a flat surface. The engagement surface 108 can be displaced between a first posture and a second posture, which will be described later, by rotating the lock lever 102 in the X direction, which is an example of a second direction intersecting with the Y direction. The engagement surface 108 can be engaged with the engaged shaft 55. When the middle door unit 60 is closed, the engagement surface 108 is displaced from the first posture to the second posture while changing the contact position G with the engaged shaft 55, and applies a pulling force to the engaged shaft 55 during the closing operation and in the closed state of the middle door unit 60, which moves the middle door unit 60 to the closed position.

[0052] As shown in FIG. 12B, the first attitude of the engagement surface 108 means the attitude of the engagement surface 108 when the connection surface 109, which will be described later, reaches the top of the engaged shaft 55 in the +Z direction. At this time, the engagement surface 108 is in an inclined state in which the end in the +X direction is located in the -Z direction relative to the end in the -X direction. In other words, the engagement surface 108 is an inclined surface extending in an intersecting direction intersecting with the Z direction when viewed from the +Y direction. This intersecting direction is called the A direction. The angle θ1 between the Z direction and the A direction is greater than 0° and less than 45°. As an example, the angle θ1 is 20°.

[0053] 9, the second attitude of the engagement surface 108 refers to the attitude of the engagement surface 108 when the middle door unit 60 is in the closed state and the engagement surface 108 engages with the engaged shaft 55. At this time, the engagement surface 108 is in an inclined state in which the end in the +X direction is located in the -Z direction relative to the end in the -X direction. The acute angle formed by the engagement surface 108 and a virtual line K along the Z direction at this time is defined as θ2. The angle θ2 is smaller than the angle θ1 (FIG. 12B). When viewed from the Y direction which is the axial direction of the rotation center axis C2, the engagement surface 108 in the second posture extends on both sides of the contact position G with the engaged shaft 55 in an inclined direction included in the in-plane direction of the engagement surface 108.

[0054] The engagement surface 108 comes into contact with the outer peripheral surface 55A of the engaged shaft 55 while transitioning from the first posture to the second posture. The posture of the engagement surface 108 at the time when the engagement surface 108 starts to come into contact with the outer peripheral surface 55A is referred to as the third posture. The engaging surface 108 in the third position generates a pulling force in the engaged shaft 55 that moves the middle door unit 60 from the open state to the closed state.

[0055] As shown in FIG. 8, a contact position G between the engagement surface 108 and the engaged shaft 55 when the middle door unit 60 is in the closed state is located below the rotation center axis C2 in the Z direction. When the middle door unit 60 is in a closed state, the contact position G is located above the central axis C3 of the engaged shaft 55 in the Z direction.

[0056] 9, leading surface 112 is formed at the +X direction end and the -Z direction end of lever body 104. Also, leading surface 112 is inclined such that the +X direction end is located in the +Z direction relative to the -X direction end when viewed from the +Y direction. Leading surface 112 is, for example, a flat surface. The leading surface 112 comes into contact with the engaged shaft 55 before the engaging surface 108 does when the state of the middle door unit 60 switches from the open state to the closed state.

[0057] As shown in FIG. 12A, when the leading surface 112 of the lock lever 102 comes into contact with the engaged shaft 55, the engaging surface 108 receives a reaction force from the engaged shaft 55 in the rotational direction from the second position to the first position.

[0058] 9, in the closed state described above, the connection surface 109 is a plane extending in the +X direction from the +X direction end of the engagement surface 108, and is connected to the -X direction end of the leading surface 112. The length of the connection surface 109 in the X direction is shorter than the length equivalent to the diameter of the engaged shaft 55, for example. When transitioning from a state in which the engaged shaft 55 and the leading surface 112 are in contact to a state in which the engaged shaft 55 and the engaging surface 108 are in contact, or when transitioning to the opposite state, the formation of the connection surface 109 provides an appropriate clicking sensation during operation of the lock lever 102.

[0059] The front wall portion 111 stands upright in the +Z direction from the end portion of the bottom wall 107 in the -X direction. The rear wall portion 114 stands upright in the +Z direction from the -X direction end of the insertion portion 106. The +Z direction end of the rear wall portion 114 is bent toward the +X direction. The rear wall portion 114 is located in the -X direction with respect to the front wall portion 111. The already-described second restricting plate portion 79 (FIG. 7) is inserted between the front wall portion 111 and the rear wall portion 114.

[0060] 11, when the middle door unit 60 is in the closed state, the bent portion of the rear wall portion 114 comes into contact with the second regulating plate portion 79 from the -X direction toward the +X direction. This regulates excessive rotation of the lock lever 102 in the +X direction. The second regulating plate portion 79 is disposed so that the leading surface 112 (FIG. 9) is not located in the -Z direction with respect to the engaged shaft 55 (FIG. 9). When the lock lever 102 is rotated in the -X direction, the front wall portion 111 (FIG. 9) comes into contact with the second restricting plate portion 79 from the +X direction to the -X direction. This restricts excessive rotation of the lock lever 102 in the -X direction. In FIG. 11, the cover member 86 (FIG. 7) is omitted.

[0061] 10, partition 115 stands upright in the +Z direction from the center of bottom wall 107 in the Y direction, and divides lock lever 102 into a portion in the +Y direction relative to the center in the Y direction and a portion in the -Y direction. The +Y direction portion includes engagement surface 108, connection surface 109 (FIG. 9), and leading surface 112. Grip portion 116 and hook portion 118 are included in the -Y direction portion.

[0062] As shown in FIG. 11, gripping portion 116 has a vertical wall portion 116A that stands upright in the +Z direction from the outer peripheral surface of insertion portion 106, an inclined portion 116B that extends diagonally from the +Z direction end of vertical wall portion 116A toward a position in the +X direction and the +Z direction, and a protruding portion 116C that protrudes out on both sides in the Y direction from the +Z direction portion of inclined portion 116B.

[0063] 10, the hook portion 118 is formed on the bottom wall 107 in the +X direction relative to the grip portion 116. When viewed from the Y direction, the hook portion 118 is a portion cut out in a U-shape that opens in the +Z direction. An upper end of a tension spring 122, which will be described later, is hooked onto the hook portion 118. When viewed from the Y direction, the portion of the hook portion 118 that comes into contact with the tension spring 122 is aligned in the Z direction with the engagement surface 108 (FIG. 9).

[0064] The tension spring 122 is an example of an applying member, and applies a force to the lock lever 102 so that the engagement surface 108 can be displaced from the already-described first position to the second position. Specifically, the lower end of the tension spring 122 is hooked on the hook portion 82. The upper end of the tension spring 122 is hooked on the hook portion 118. As a result, a force is applied to the lock lever 102 in a direction that presses the engagement surface 108 against the outer circumferential surface of the engaged shaft 55.

[0065] Next, the operation of the printer 10 will be described. For the configuration of each part of the printer 10, please refer to Figures 1 to 12B, and the individual figure numbers will be omitted. When the inner door unit 60 in the closed state is opened, the grip portion 116 is gripped by an operator and tilted in the -X direction against the tensile force of the tension spring 122, causing the lock lever 102 to rotate in the -X direction. At this time, the engagement surface 108 is moved while changing the contact position with the outer peripheral surface 55A in the +Z direction, and is separated from the outer peripheral surface 55A. Then, the connection surface 109 passes over the engaged shaft 55 in the -X direction, causing the engagement between the lock lever 102 and the engaged shaft 55 to be released, and the inner door unit 60 becomes capable of opening.

[0066] When the middle door unit 60 in the open state is operated to close, the end portion of the middle door unit 60 in the +Y direction is pushed in the +X direction by the operator, so that the middle door unit 60 rotates toward the closed position. Note that, in the closing operation, the lock lever 102 is not operated by the operator. When the middle door unit 60 approaches the closed position, the leading surface 112 comes into contact with the outer peripheral surface 55A in the +X direction. Here, the leading surface 112 receives a reaction force from the engaged shaft 55, causing the lock lever 102 to rotate in the -X direction. Then, the connection surface 109 passes over the engaged shaft 55 in the +X direction, causing the engagement surface 108 to come into contact with the outer peripheral surface 55A. At this time, the engagement surface 108 generates a retraction force, changing the contact position G and moving to a position in the closed state. As a result, the lock lever 102 and the engaged shaft 55 are engaged, and the middle door unit 60 is in the closed state. In this manner, the engaging surface 108 applies a pulling force to the engaged shaft 55 during the closing operation and in the closed state, which moves the middle door unit 60 to the closed position. In the printer 10, the retracting force remains generated when the printer 10 is in the closed state, so the inner door unit 60 is less likely to be opened accidentally.

[0067] As described above, according to the printer 10, when the inner door unit 60 is operated from the open position to the closed position, the engagement surface 108 comes into contact with the engaged shaft 55. The engagement surface 108 changes its posture from the first posture to the second posture as the inner door unit 60 approaches the closed position. Here, when the posture of the engagement surface 108 changes from the first posture to the second posture, the posture of the engagement surface 108 changes as the contact position G with the engaged shaft 55 changes. In other words, because the posture of the engagement surface 108 changes while the engagement surface 108 and the engaged shaft 55 remain in contact with each other, there is no need to overstroke the lock lever 102 in the +X direction. Furthermore, since there is no longer a need to overstroke the lock lever 102, interference between the multiple main gears 42 and the transmission gear 44 can be suppressed.

[0068] According to the printer 10, the rotation center axis C2 of the lock lever 102 does not move. This simplifies the mechanism for moving the lock lever 102 compared to a configuration in which the entire lock lever 102 slides. According to the printer 10, the leading surface 112 comes into contact with the engaged shaft 55, and then the lock lever 102 rotates in the direction from the second position to the first position, and the engaging surface 108 and the engaged shaft 55 transition to a contact state. In other words, since the lock lever 102 is more likely to be rotated before the engaging surface 108 and the engaged shaft 55 come into contact, the engaging surface 108 and the engaged shaft 55 are more likely to transition to a contact state.

[0069] According to the printer 10, when the middle door unit 60 is moved from the open state to the closed state, the contact area between the engagement surface 108 and the engaged shaft 55 gradually increases and the frictional force acting on the engagement surface 108 also gradually increases, compared to a configuration in which the lock lever 102 slides, thereby reducing the feeling of sticking when the middle door unit 60 is closed. According to the printer 10, the rotation center axis C2, which is the center of rotation of the lock lever 102, is located above the contact position G between the engagement surface 108 and the engaged shaft 55 in the Z direction, so that when the lock is released, the engagement surface 108 is more likely to move in a direction away from the engaged shaft 55, making it easier to release the lock.

[0070] According to the printer 10, the first abutment portion 51, the second abutment portion 54, and the third abutment portion 58 restrict movement of the inner door unit 60 in the closed state. Here, because the engaged shaft 55 is positioned to overlap the first abutment portion 51 in the Z direction, the contact position G between the engagement surface 108 and the engaged shaft 55 and the position where the inner door unit 60 is restricted by the first abutment portion 51 are arranged close to each other, so that when the engagement surface 108 and the engaged shaft 55 come into contact with each other, it is possible to prevent the inner door unit 60 from being operated over-stroke in the +X direction. According to the printer 10, even if the contact position G between the engagement surface 108 and the engaged shaft 55 shifts, the engagement surface 108 extends on both sides of the contact position G, so that the engagement surface 108 and the engaged shaft 55 can come into contact with each other.

[0071] According to the printer 10, compared to a configuration in which the angle θ1 between the Z direction and the A direction exceeds 45 degrees, the horizontal component of the force acting at the contact position G between the engagement surface 108 and the engaged shaft 55 is increased, making it easier to ensure the retraction force when the lock lever 102 comes into contact with the engaged shaft 55. According to the printer 10, the outer door unit 30 presses the inner door unit 60 in the closed state toward the device body 12, thereby restricting the movement of the inner door unit 60 to the open position, so that the inner door unit 60 can be maintained in the closed state.

[0072] According to the printer 10, the pinch roller 94, in contact with the rubber roller 36, receives a pressing force from the pressing spring 96, and is pressed against the rubber roller 36. Even if the outer door unit 30 is operated in an over-stroke relative to the inner door unit 60, the pressing spring 96 absorbs the pressing force acting on the pinch roller 94 from the rubber roller 36 by elastically deforming. This makes it possible to prevent the pinch roller 94 from deforming. According to the printer 10, even if the paper P becomes jammed during transport, it can be removed by opening the inner door unit 60 or the outer door unit 30, thereby preventing the paper P from remaining in the discharge path T2, or the feed path T4 and switchback path T5. According to the printer 10, the line head 28 records on the transported paper P. Even if the recorded paper P becomes jammed during transport, the recorded paper P can be removed by opening the inner door unit 60 or the outer door unit 30, so that the recorded paper P can be prevented from remaining in the discharge path T2, the feed path T4, or the switchback path T5.

[0073] The printer 10 according to the embodiment of the present invention is based on the configuration described above, but it is of course possible to modify or omit parts of the configuration without departing from the spirit of the present invention.

[0074] In the printer 10, the lock lever 102 may not have a rotation center axis C2 and may slide linearly. The leading surface 112 is not limited to a flat surface, but may be a curved surface. Also, an inclined surface like the leading surface 112 does not have to be formed. The engagement surface 108 is not limited to a flat surface, but may be a curved surface. The central axis of rotation C2 may not be perpendicular to the axis of rotation C1 but may intersect with it. The contact position G between the engagement surface 108 and the engaged shaft 55 in the closed state may be located at the same position as the rotation center axis C2 or above the rotation center axis C2 in the Z direction. The lock lever 102 may be provided on the device main body 12 side, and the engaged shaft 55 may be provided on the middle door unit 60 .

[0075] In the printer 10, the engagement surface 108 in the second position may extend to one side of the contact position G with the engaged shaft 55 when viewed in the axial direction of the rotation center axis C2. The angle θ1 between the Z direction and the A direction may be an angle of 45° or more. The outer door unit 30 does not necessarily have to be pressed against the inner door unit 60. The outer door unit 30 may be provided with a pinch roller 94 and a pressure spring 96 , and the inner door unit 60 may be provided with a rubber roller 36 . A transport path for paper P does not necessarily have to be formed between the inner door unit 60 and the outer door unit 30. In the printer 10, the line head 28 may be removed, and the printer 10 may simply be configured as a medium transport device that transports the paper P.

[0076] The plurality of rotating bodies may be provided in such a manner that some of them are provided in the device main body 12 and some of them are provided in the inner door unit 60 . In the middle door unit 60, the rotation axis C1 is not limited to a configuration in which it extends vertically, and may be a configuration in which the rotation axis C1 extends horizontally. [Explanation of symbols]

[0077] 10: printer; 12: device body; 12A: opening; 13: discharge section; 14...main body frame, 15...paper cassette, 16...pick roller, 17... conveying roller pair, 18... conveying roller pair, 21... pulley, 22... conveying belt, 24... conveying roller pair, 24A... conveying roller, 24B... conveying roller, 25... flap, 27: ink tank, 28: line head, 29: control unit, 30: outer door unit, 32: hinge portion, 34: outer cover, 35: outer frame, 35A: lower portion, 35B: center portion, 35C: upper portion, 36: rubber roller, 37: shaft portion, 38: enlarged diameter portion, 38A: outer circumferential surface, 40...rotating portion, 42...main body gear, 43...gear, 44...transmission gear, 45...main body bracket, 46... Vertical wall, 47... Side wall, 48... Side wall, 51... First abutment part, 52... Overhang part, 54: second abutment portion, 55: engaged shaft, 55A: outer circumferential surface, 56: damper, 56A: contact portion, 56B: spring portion, 58: third abutment portion, 60: middle door unit, 61: Rotating shaft; 62: Frame portion; 63: First frame; 64: Vertical wall; 65...Guide part, 65A...Bottom wall, 65B...Side wall, 65C...Front wall, 65D...Top wall, 66: second frame; 67: vertical wall; 68: support bracket; 69: vertical plate portion; 71: horizontal plate portion, 72: support plate portion, 73: shaft portion, 74: support shaft portion, 76: shaft, 78: first regulating plate portion, 79: second regulating plate portion, 82: hook portion, 84: gear portion, 84A: transmission gear; 84B: drive gear; 86: cover member; 87: first side wall; 88: second side wall; 89: third side wall; 92: abutment portion; 94: pinch roller; 94A...shaft portion, 94B...expanded diameter portion, 94C...teeth, 100...lock mechanism portion, 102... lock lever, 104... lever body, 106... insertion portion, 107... bottom wall, 107A... bottom surface, 108... engagement surface, 109... connection surface, 111... front wall portion, 112... leading surface, 114... Rear wall part, 115... Partition part, 116... Gripping part, 116A... Vertical wall part, 116B: inclined portion; 116C: protruding portion; 118: hook portion; 122: tension spring; A: direction, C1: rotation axis, C2: rotation center axis, C3: center axis, G: contact position, K: virtual line, L1: Length, Q: Ink, T: Transport path, T1: Main transport path, T2: Discharge path, T3: Discharge path, T4…inlet path, T5…switchback path, T6…outlet path, θ1…angle, θ2…angle

Claims

1. a device body in which the medium is transported; The switch is connected to the device body so as to be rotatable about a rotation axis and is adapted to switch between an open state and a closed state. With a removable door, In the open state, they are separated from each other, and in the closed state, they are in contact with each other to transmit a driving force. A plurality of rotating bodies that can be reached; The door is locked to the main body of the apparatus to be in the closed state, and the door and the main body of the apparatus are locked to be in the closed state. a lock mechanism that releases the lock to place the door in the open state; Equipped with The lock mechanism includes: An engaged portion that is long in a first direction; an engagement surface that is displaceable between a first position and a second position in a second direction that intersects the first direction; an engaging portion having the engaging surface that is engageable with the engaged portion; The engaging surface applies a force to the engaging portion so as to be displaceable from the first position to the second position. and an application member for applying the Equipped with The plurality of rotating bodies are separated from each other in the open state and are engaged with each other in the closed state. These are multiple gears that can transmit driving force when fitted together. When the door is closed, the engaging surface moves forward while changing the contact position with the engaged portion. The door is displaced from the first position to the second position, and a pulling force that moves the door to a closed position is applied to the door. a closing action and a closing state, A medium transport device comprising:

2. 2. The medium transport device according to claim 1, The engagement portion has a rotation center axis relative to the door. A medium transport device comprising:

3. 3. The medium transport device according to claim 2, The engaging portion is configured to engage with the engaging surface when the state of the door is switched from the open state to the closed state. a leading surface that comes into contact with the engaged portion earlier than the leading surface, When the leading surface comes into contact with the engaged portion, the engaging surface is in the second position. a reaction force in a rotation direction from the engaging portion to the first attitude; A medium transport device comprising:

4. 4. The medium transport device according to claim 2, In the closed state, the rotation central axis is perpendicular to the rotation axis. A medium transport device comprising:

5. a device body in which the medium is transported; The switch is connected to the device body so as to be rotatable about a rotation axis and is adapted to switch between an open state and a closed state. With a removable door, In the open state, they are separated from each other, and in the closed state, they are in contact with each other to transmit a driving force. A plurality of rotating bodies that can be reached; The door is locked to the main body of the apparatus to be in the closed state, and the door and the main body of the apparatus are locked to be in the closed state. a lock mechanism that releases the lock to place the door in the open state; Equipped with The lock mechanism includes: An engaged portion that is long in a first direction; an engagement surface that is displaceable between a first position and a second position in a second direction that intersects the first direction; an engaging portion having the engaging surface that is engageable with the engaged portion; The engaging surface applies a force to the engaging portion so as to be displaceable from the first position to the second position. and an application member for applying the Equipped with The engagement portion has a rotation center axis relative to the door, In the closed state, the rotation central axis is perpendicular to the rotation axis, When the door is closed, the engaging surface moves forward while changing the contact position with the engaged portion. The door is displaced from the first position to the second position, and a pulling force that moves the door to a closed position is applied to the door. a closing action and a closing state, A medium transport device comprising:

6. The medium transport device according to any one of claims 2 to 5, In the closed state, the contact position between the engaging surface and the engaged portion is , located below the rotation center axis, A medium transport device comprising:

7. 7. The medium transport device according to claim 2, The engaging portion is provided on one of the device body and the door, The other of the device body and the door includes the engaged portion and a restricting portion for restricting the movement of the door. The following is provided: In the closed state, the engaged portion is positioned so as to overlap with the restricting portion in the device height direction. Located in A medium transport device comprising:

8. The medium conveying device according to claim 7, The restricting portion contacts a support shaft portion that supports the engaging portion in a displaceable manner, thereby restricting the engaging portion from being displaced. A part that restricts the movement of the door. A medium transport device comprising:

9. a device body in which the medium is transported; The switch is connected to the device body so as to be rotatable about a rotation axis and is adapted to switch between an open state and a closed state. With a removable door, In the open state, they are separated from each other, and in the closed state, they are in contact with each other to transmit a driving force. A plurality of rotating bodies that can be reached; The door is locked to the main body of the apparatus to be in the closed state, and the door and the main body of the apparatus are locked to be in the closed state. a lock mechanism that releases the lock to place the door in the open state; Equipped with The lock mechanism includes: An engaged portion that is long in a first direction; an engagement surface that is displaceable between a first position and a second position in a second direction that intersects the first direction; an engaging portion having the engaging surface that is engageable with the engaged portion; The engaging surface applies a force to the engaging portion so as to be displaceable from the first position to the second position. and an application member for applying the Equipped with The engaging portion is provided on one of the device body and the door, The other of the device body and the door includes the engaged portion and a restricting portion for restricting the movement of the door. The following is provided: In the closed state, the engaged portion is positioned so as to overlap with the restricting portion in the device height direction. Located in The restricting portion contacts a support shaft portion that supports the engaging portion in a displaceable manner, thereby restricting the engaging portion from being displaced. The movement of the door is restricted. When the door is closed, the engaging surface moves forward while changing the contact position with the engaged portion. The door is displaced from the first position to the second position, and a pulling force that moves the door to a closed position is applied to the door. a closing action and a closing state, A medium transport device comprising:

10. The medium transport device according to any one of claims 2 to 8, The engaging surface in the second attitude is in contact with the engaged portion when viewed in the axial direction of the rotation central shaft. Extends on both sides of the touch position, A medium transport device comprising:

11. 11. The medium transport device according to claim 10, The engagement surface is an inclined surface extending in a direction intersecting with the device height direction, the angle between the device height direction and the intersecting direction is greater than 0 degrees and smaller than 45 degrees; A medium transport device comprising:

12. The medium transport device according to any one of claims 1 to 11, an outer door is provided on the outer side of the door with respect to the device body; The outer door is rotatably connected to the device body to switch between an open state and a closed state. and in the closed state, the door is turned toward the device body. And press, A medium transport device comprising:

13. 13. The medium transport device according to claim 12, One of the door and the outer door has a rotatable roller and the roller is connected to the door and the outer door. and an elastically deformable pressing member that presses the outer door toward the other side. The other of the door and the outer door has a contact portion that contacts the roller. A medium transport device comprising:

14. 14. The medium transport device according to claim 13, a first transport path along which the medium is transported is formed between the device body and the door; Between the door and the outer door, a second roller is disposed, through which the medium is transported by the rotation of the roller. A transport path is formed. A medium transport device comprising:

15. 15. The medium transport device according to claim 14, The recording unit may further include a recording unit for recording on the medium being conveyed. A medium transport device comprising:

Images