Media transport device and recording device

Abstract

The mechanism on door 7 becomes more complex, and the weight of the door increases, potentially making it difficult to open and close. [Solution] The device comprises a first roller 9 for transporting a medium S, a second roller 11, a first rotating shaft 13 that rotatably supports the first roller, a displacement mechanism 15 that displaces the first rotating shaft to a first position P1 in which the first and second rollers can nip the medium, and a second position P2 in which the two rollers 9 and 11 are separated, and a door 7 that can be opened and closed in a direction intersecting the first rotating shaft and can rotate to an open position and a closed position relative to the device body 5. The door has an operating part 17, and the displacement mechanism has an actuated part 19. When the door is closed, the operating part 17 is in contact with and pressing against the actuated part 19. When the door 7 rotates from closed to open and the operating part 17 no longer presses against the actuated part 19, the displacement mechanism displaces the first rotating shaft 13 from the first position to the second position.

Description

Technical Field

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

Background Art

[0002] As an example of the prior art of this type of sheet conveyance device, the one described in Patent Document 1 can be cited. Patent Document 1 discloses a sheet conveyance device in which 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 opens, the pressure contact state of the pair of conveyance rollers is released by a locking mechanism interlocked with the door, and one roller moves away from the other roller.

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 moves 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 conveying device according to the present invention comprises: a first roller for conveying a medium; a second roller for nipping the medium together with the first roller; a first rotating shaft that rotatably supports the first roller; a displacement mechanism that displaces the first rotating shaft to a first position in which the first roller and the second roller can nip the medium, and to a second position in which the first roller is separated from the second roller; a device body that supports the displacement mechanism; and a door that can be opened and closed with respect to a second rotating shaft extending in a direction intersecting the first rotating shaft as a pivot point, and is rotatable to an open position and a closed position relative to the device body, wherein the door has an operating part, and the displacement mechanism has an operating part, and when the door is in the closed position, the operating part is in contact with and pressing the operating part, and the displacement mechanism displaces the first rotating shaft from the first position to the second position when the door rotates from the closed position to the open position and the operating part no longer presses the operating part.

[0006] Furthermore, the recording device according to the present invention is characterized by comprising the above-mentioned media transport device and a recording unit that performs recording on the medium transported by the media transport device. [Brief explanation of the drawing]

[0007] [Figure 1] A schematic perspective view of the recording device according to Embodiment 1. [Figure 2] A schematic plan view of the main parts of Embodiment 1. [Figure 3] Plan view (A) of the main part of the displacement mechanism section of the media transport section of Embodiment 1 and plan view (B) of the sliding member. [Figure 4] A perspective view of the main part of the displacement mechanism section of Embodiment 1. [Figure 5] A plan view of the main part of the displacement mechanism section of Embodiment 1. [Figure 6] A perspective view of the main part of the displacement mechanism section of Embodiment 1. [Figure 7] A plan view of the main part of the displacement mechanism section of Embodiment 1. [Figure 8] A perspective view of the displacement mechanism unit of Embodiment 1. [Modes for carrying out the invention]

[0008] The present invention will now be described in general terms. To solve the above problems, a media conveying device according to a first aspect of the present invention comprises: a first roller for conveying a medium; a second roller for nipping the medium together with the first roller; a first rotating shaft that rotatably supports the first roller; a displacement mechanism that displaces the first rotating shaft between a first position in which the first roller and the second roller can nip the medium and a second position in which the first roller is separated from the second roller; a device body that supports the displacement mechanism; and a door that can be opened and closed with respect to a second rotating shaft extending in a direction intersecting the first rotating shaft as a pivot point, and that can be rotated to an open position in which it is open relative to the device body and a closed position in which it is closed. Furthermore, the door is provided with an operating part, and the displacement mechanism is provided with an actuated part, wherein when the door is in the closed position, the operating part is in contact with and pushing the actuated part, and the displacement mechanism is characterized in that when the door rotates from the closed position to the open position and the operating part no longer pushes the actuated part, it displaces the first rotation axis from the first position to the second position.

[0009] According to this embodiment, the door is provided with an operating part, and the displacement mechanism is provided with an actuated part. When the door is in the closed position, the operating part is in contact with and pushing the actuated part. When the door rotates from the closed position to the open position and the operating part no longer pushes the actuated part, the displacement mechanism displaces the first rotation axis from the first position to the second position. As a result, since only the operating part is provided on the door side, the mechanism on the door side is not complicated, the weight does not increase significantly, and there is little risk of the door becoming difficult to open and close.

[0010] A media transport device according to a second aspect of the present invention, in the first aspect, comprises a displacement mechanism comprising: a first cam provided on one end of the first rotating shaft and rotating around the first shaft; a second cam provided on the other end of the first rotating shaft and rotating around a second shaft; a first contact portion that rotates integrally with the first cam around the first shaft and is capable of contacting one end of the first rotating shaft; and a second contact portion that rotates integrally with the second cam around the second shaft and is capable of contacting the other end of the first rotating shaft. The device is characterized in that when the acting portion ceases to press on the acted portion, the first cam rotates so that the first contact portion contacts one end of the first rotating shaft and moves that end of the first rotating shaft, and the second cam rotates so that the second contact portion contacts the other end of the first rotating shaft and moves that end of the first rotating shaft, thereby displacing the first rotating shaft from the first position to the second position.

[0011] According to this embodiment, the structure for displacing the entire first rotating shaft from the first position to the second position is composed of a cam structure consisting of a pair of a first cam and a first contact portion provided on one end of the first rotating shaft, and a second cam and a second contact portion provided on the other end of the first rotating shaft. Thus, with a simple structure consisting of a pair of cam structures, the one end and the other end of the first rotating shaft can be displaced from the first position to the second position, thereby separating the first roller from the second roller.

[0012] A media transport device according to a third aspect of the present invention, in the second aspect, is characterized in that the first cam and the second cam are each subjected to rotational force by a first rotational force applying member and a second rotational force applying member, respectively, and when the acting part ceases to press against the acted part, the first cam and the second cam rotate due to the rotational force, displacing the first rotation axis from the first position to the second position.

[0013] According to this embodiment, when the acting part ceases to press against the acted part, the first cam and the second cam rotate due to the rotational force, displacing the first rotation axis from the first position to the second position. As a result, when the door is opened, the rotational force of the rotational force applying member automatically separates the first roller from the second roller.

[0014] A media transport device according to a fourth aspect of the present invention, in a third aspect, comprises a displacement mechanism comprising a slide member to which the acted-on part is attached, a first cam actuating part provided on the slide member for rotating the first cam, and a second cam actuating part for rotating the second cam, wherein when the door is closed, the actuating part pushes the acted-on part, causing the slide member to slide, the first cam actuating part rotates the first cam against the rotational force of the first rotational force applying member, and simultaneously, the second cam actuating part rotates the second cam against the rotational force of the second rotational force applying member, thereby positioning the first roller at the first position.

[0015] According to this embodiment, when the door is closed, the sliding member slides, the first cam action causes the first cam to rotate against the rotational force of the first rotational force applying member, and simultaneously, the second cam action causes the second cam to rotate against the rotational force of the second rotational force applying member, thereby positioning the first roller at the first position. As a result, the entire first rotation axis can be displaced from the second position to the first position with a simple structure that involves sliding the sliding member. That is, the first roller can be moved to a position where the medium can be nipped between it and the second roller. Furthermore, since the sliding member does not rotate, it can be made smaller compared to a rotating structure.

[0016] A media transport device according to a fifth aspect of the present invention, in the fourth aspect, is characterized in that the slide member is plate-shaped, and the plate-shaped surface of the slide member is aligned in the direction in which the first rotation axis is displaced from the first position to the second position.

[0017] According to this aspect, the surface of the plate-shaped slide member is arranged along the direction in which the first rotation axis is displaced from the first position to the second position. Thereby, compared with a structure in which the first rotation axis is not arranged along the displacement direction, miniaturization in the direction intersecting the displacement direction can be achieved.

[0018] The media conveyance device according to the sixth aspect of the present invention is characterized in that, in the fourth aspect or the fifth aspect, the slide member slides in the axial direction of the first rotation axis.

[0019] According to this aspect, since the slide member slides in the axial direction of the first rotation axis, miniaturization can be achieved while securing the amount of movement of the first rotation axis.

[0020] The media conveyance device according to the seventh aspect of the present invention is characterized in that, in any one of the third aspect to the sixth aspect, when the first rotation axis is displaced from the first position to the second position, the first cam rotates in a first rotation direction, and at the same time, the second cam rotates in a second rotation direction opposite to the first rotation direction.

[0021] According to this aspect, when the first rotation axis is displaced from the first position to the second position, the first cam rotates in a first rotation direction, and at the same time, the second cam rotates in a second rotation direction opposite to the first rotation direction. That is, one rotates clockwise and the other rotates counterclockwise to displace the first rotation axis. Therefore, the directions of the rotational forces applied to the first rotation axis are reversed and cancel each other out, and the first rotation axis can be stably moved in the displacement direction.

[0022] The media conveyance device according to the eighth aspect of the present invention is characterized in that, in the seventh aspect, the first rotation axis having the first roller, the slide member having the actuated portion, and the displacement mechanism portion having the first cam, the second cam, the first contact portion, and the second contact portion are assembled via a frame to constitute a single unit.

[0023] In this embodiment, the first rotating shaft, the sliding member, and the displacement mechanism having the first cam, the second cam, the first contact portion, and the second contact portion are integrally assembled and unitized. This makes it easier to attach to the main body of the device and also makes it easier to miniaturize by unitizing the components.

[0024] A media transport device according to the ninth aspect of the present invention is characterized in that, in any one aspect of the first to eighth aspects, the door is located on the side of the device body, the second rotating shaft is located on the rear side of the device body and opens and closes with the front end being a free end, the displacement mechanism is provided along the door in the front-rear direction when it is closed, and the actuated part is located on the rear side of the device body.

[0025] According to this embodiment, since the part to be operated on is located at the rear of the device body, there is less risk of the user inadvertently coming into contact with the part to be operated on when the door is open. Furthermore, it is easier to miniaturize the device.

[0026] Furthermore, a recording device according to a tenth aspect of the present invention is characterized by comprising a media transport device according to any of the above aspects, and a recording unit that performs recording on a medium transported by the media transport device. According to this embodiment, the same effects as those in the embodiments described above can be obtained as a recording device.

[0027] [Embodiment 1] Hereinafter, a media transport device 1 and a recording device 100 equipped with the media transport device 1 according to Embodiment 1 of the present invention will be specifically described with reference to Figures 1 to 8. In this description, the recording device 100 will be described as an inkjet printer. In the following explanation, the three mutually orthogonal axes will be referred to as the X-axis, Y-axis, and Z-axis, as shown in each figure. The Z-axis direction corresponds to the vertical direction, i.e., the direction in which gravity acts. The X-axis and Y-axis directions correspond to the horizontal direction. In each figure, the direction indicated by the arrows on the three axes (X, Y, Z) is the positive direction, and the opposite direction is the negative direction. Here, the +Y direction is the front side of the recording device 100, and the -Y direction is the rear side of the recording device.

[0028] As shown in Figure 1, in this embodiment, the recording device 100 is equipped with a line head, which is a recording unit 3 that ejects ink onto a medium S transported by a medium transport device 1 to perform recording. In Figure 1, reference numeral 2 denotes a medium cassette, reference numeral 4 denotes a transport path, and reference numeral 6 denotes an ejection unit. The media S contained in the media cassette 2 is transported along the transport path 4 and passes through the recording execution area of ​​the recording unit 3 located inside the main body of the device 5. The media S recorded in the recording unit 3 is transported along the transport path 4 and discharged to the discharge unit 6. The transport path 6 located inside the main body of the device 5 is not shown in this diagram.

[0029] The main body of the device 5 is provided with a door 7. In this embodiment, the door 7 is located on the right side of the main body of the device 5 and has a second pivot shaft 8 (Figure 2) that serves as a pivot point at the rear side (-Y direction) of the main body of the device 5, with the front end being a free end 10, allowing it to open and close. The door 7 can be opened to clear a blockage in the transport path 4 when the medium S becomes jammed. On the inner surface of the door 7, a path component member 12 that constitutes the transport path 4 is provided. When the door 7 is closed, the path component member 12 faces the path component member 14 on the device body 5 side and constitutes the transport path 4.

[0030] As shown in Figures 2 and 3(A), the media transport device 1 according to this embodiment includes a first roller 9 for transporting the media S, a second roller 11 for nipping the media S together with the first roller 9, a first rotating shaft 13 that rotatably supports the first roller 9, a displacement mechanism 15 that displaces the first rotating shaft 13 to a first position P1 (Figure 7) where the first roller 9 and the second roller 11 can nip the media S, and a second position P2 (Figures 3(A) and 5) where the first roller 9 is separated from the second roller 11, and a device body 5 that supports the displacement mechanism 15. Furthermore, the media transport device 1 is equipped with a door 7 that can be opened and closed using a second rotating shaft 8 extending in a direction intersecting the first rotating shaft 13 as a pivot point, and is rotatable to an open position and a closed position relative to the device body 5. In Figure 2, to avoid complicating the drawing, only the sliding member 41, which is a component of the displacement mechanism 15 and will be described later, is shown, and other details are omitted. The door 7 has an operating part 17 (Figure 2) at one location, and the displacement mechanism 15 has an actuated part 19 at one location. When the door 7 is in the closed position, the operating part 17 is in contact with and pushing the actuated part 19. Figure 2 shows the state in which the operating part 17 is not in contact with the actuated part 19, i.e., not pushing. In this embodiment, the displacement mechanism 15 is installed along the front-rear direction along the closed door 7, and the actuated part 19 is located on the rear side of the device body 5. The displacement mechanism 15 is configured to displace the first rotation axis 13 from the first position P1 to the second position P2 when the door 7 rotates from the closed position to the open position and the acting part 17 no longer presses against the acted part 19.

[0031] <Second Roller> As shown in Figure 3(A), the second roller 11 is a drive roller that rotates when a driving force is transmitted from a drive source (not shown) in this embodiment. Here, the second roller 11 is composed of a toothed roller with multiple teeth formed on its outer surface. The second roller 11 is supported on the shaft 16 so as to rotate integrally with the shaft 16. The shaft 16 is rotatably mounted on the main body 5 of the device.

[0032] <First Roller> As shown in Figure 3(A), in this embodiment, the first roller 9 is a driven roller that rotates in conjunction with the rotation of the second roller 11. The roller pair of the second roller 11 and the first roller 9 nip the medium S and transport it along the transport path 4. The first rotation axis 13 of the first roller 9 is attached to the device body 5 so as to be movable in a direction toward and toward the second roller 11. Here, the first rotation axis 13 is moved while being guided by a guide member (not shown), and is configured to be able to move between a first position P1 and a second position P2.

[0033] <Displacement mechanism> The structure of the displacement mechanism 15 will be explained using Figures 3 to 7. In this embodiment, the displacement mechanism 15 includes a first cam 25 provided on one end 21 of the first rotation shaft 13 and rotating around the first shaft 23, and a second cam 31 provided on the other end 27 of the first rotation shaft 13 and rotating around the second shaft 29. Furthermore, the displacement mechanism 15 includes a first contact portion 33 that rotates integrally with the first cam 25 around the first shaft 23 and is capable of contacting one end 21 of the first rotation shaft 13, and a second contact portion 35 that rotates integrally with the second cam 31 around the second shaft 29 and is capable of contacting the other end 27 of the first rotation shaft 13. In this embodiment, the first cam 25 and the first contact portion 33, and furthermore, the second cam 31 and the second contact portion 35, are each formed by integral molding of a resin material.

[0034] When the door 7 is opened and the actuating part 17 no longer presses against the actuated part 19, the displacement mechanism 15 rotates so that the first cam 25 comes into contact with one end 21 of the first rotating shaft 13, causing that end 21 to move. At the same time, the second cam 31 rotates so that the second contacting part 35 comes into contact with the other end 27 of the first rotating shaft 13, causing that end 27 to move. Figure 5 shows the state in which the first rotation axis 13 has moved to the second position P2. Specifically, Figure 5(A) shows the state in which the first cam 25 rotates, causing the contact portion 18 of the first contact portion 33 to contact one end 21 of the first rotation axis 13 and move in the direction of arrow 20, thereby moving it to the second position P2. Figure 5(B) shows the state in which the second cam 31 rotates, causing the contact portion 22 of the second contact portion 35 to contact one end 21 of the first rotation axis 13 and move in the direction of arrow 20, thereby moving it to the second position P2. Figure 7 shows the state in which the first rotation axis 13 has moved to the first position P1. Specifically, Figure 7(A) shows the state in which the first cam 25 rotates and the contact action part 18 of the first contact part 33 moves in the direction of arrow 24 away from one end 21 of the first rotation axis 13, moving one end 21 of the first rotation axis 13 to the first position P1. Figure 7(B) shows the state in which the second cam 31 rotates and the contact action part 22 of the second contact part 35 moves in the direction of arrow 24 away from the other end 27 of the first rotation axis 13, moving the other end 27 of the first rotation axis 13 to the first position P1. As a result of the aforementioned movement, the first rotation axis 13 is displaced from the first position P1 (Figure 7) to the second position P2 (Figure 5). That is, the first roller 9 becomes separated from the second roller 11. In this state, processing can be performed if the medium S becomes jammed in the transport path 4.

[0035] Furthermore, as shown in Figures 3, 5, and 7, in this embodiment, the first cam 25 and the second cam 31 are each subjected to rotational force by the first rotational force applying member 37 and the second rotational force applying member 39. When the acting part 17 stops pressing on the acted part 19, the first cam 25 and the second cam 31 are configured to rotate due to the rotational force, displacing the first rotation shaft 13 from the first position P1 to the second position P2. In other words, the first cam 25 and the second cam 31 receive rotational force from the first rotational force applying member 37 and the second rotational force applying member 39 in a direction that moves the first rotation shaft 13 in a direction that separates the first roller 9 from the nip position between it and the second roller 11 (arrow 20). In this configuration, both the first rotational force-applying member 37 and the second rotational force-applying member 39 are composed of torsion coil springs.

[0036] Furthermore, as shown in Figures 3(A)(B), 4, and 6, in this embodiment, the displacement mechanism 15 includes a slide member 41 to which the actuated part 19 is attached, a first cam actuating part 43 provided on the slide member 41 that rotates the first cam 25, and a second cam actuating part 45 that rotates the second cam 31. The first cam 25 has a first sliding projection 26 that abuts against and slides against the inclined edge of the first cam actuating part 43. The second cam 31 has a second sliding projection 28 that abuts against and slides against the inclined edge of the second cam actuating part 45. The second sliding projection 28 is provided using a part of the actuated part 19. Here, the first rotating shaft 13 is subjected to a compressive force by a compression spring (not shown) that moves the first roller 9 to the nip position with respect to the second roller 11.

[0037] When the door 7 is closed, the actuating part 17 pushes the actuated part 19, causing the sliding member 41 to slide in the -Y direction. This movement causes the inclined edge of the first cam actuating part 43 to rotate the first cam 25 against the rotational force of the first rotational force applying member 37 via the first sliding projection 26, and simultaneously, the inclined edge of the second cam actuating part 45 to rotate the second cam 31 against the rotational force of the second rotational force applying member 39 via the second sliding projection 28. As a result, the first roller 9 moves to the first position P1 under the force of the compression spring, allowing the medium S to be nipped between it and the drive roller 11.

[0038] Furthermore, as shown in Figures 3(A)(B), 4, and 6, in this embodiment, the slide member 41 has a plate-like shape. The plate-like surface 47 of the slide member 41 is oriented along the direction in which the first rotation axis 13 is displaced from the first position P1 to the second position P2. In other words, the plate-like surface 47 is oriented along the direction in which the first rotation axis 13 is displaced. That is, it is oriented along the XY plane intersecting the Z-axis direction. In each figure, reference numeral 30 denotes a frame to which the first cam 25, the second cam 31, the slide member 41, etc., are attached. Furthermore, the sliding member 41 is provided on the frame 30 so as to slide in the axial direction (Y-axis direction) of the first rotation axis 13.

[0039] [Differentiation] The sliding member 41 may be modified to slide in the X-axis direction, which intersects with the axial direction of the first rotation axis 13 (Y-axis direction), instead of sliding in the axial direction of the first rotation axis 13 (Y-axis direction). In this case, the same function can be achieved by changing the specific structure of related members such as the first cam 25, the second cam 31, the first cam action part 43, and the second cam action part 45 to match the movement in the X-axis direction.

[0040] Furthermore, as shown in Figures 5(A) and 5(B), in this embodiment, when the first rotation axis 13 is displaced from the first position P1 to the second position P2, the first cam 25 rotates counterclockwise in a first rotation 51, and at the same time, the second cam 31 rotates clockwise in a second rotation 53, which is the opposite direction to the first rotation 51. As shown in Figures 7(A) and 7(B), when the first rotation axis 13 is displaced from the second position P2 to the first position P1, the first cam 25 rotates clockwise in a second rotation 53, and at the same time, the second cam 31 rotates counterclockwise in a first rotation 51, which is the opposite direction to the second rotation 53.

[0041] Furthermore, as shown in Figure 8, in this embodiment, a first rotating shaft 13 having a first roller 9, a sliding member 41 having an actuated part 19, and a displacement mechanism 15 having a first cam 25, a second cam 31, a first contact part 33, and a second contact part 35 are assembled via a frame 30 and a window frame member 32 to form a single unit 55. The window frame member 55 is fastened to the frame 30 by screws 36, with the first roller 9 exposed from each window 34.

[0042] <Description of the effects of the embodiment> (1) According to this embodiment, the door 7 is equipped with an operating part 17, and the displacement mechanism 15 is equipped with an actuated part 19. When the door 7 is in the closed position, the operating part 17 is in contact with and pushing the actuated part 19. When the door 7 rotates from the closed position to the open position and the operating part 17 no longer pushes the actuated part 19, the displacement mechanism 15 displaces the first rotation axis 13 from the first position P1 to the second position P2. As a result, since only the operating part 17 is provided on the door 7 side, the mechanism on the door 7 side does not become complicated, the weight does not increase much, and there is little risk of the door 7 becoming difficult to open and close.

[0043] (2) Furthermore, according to this embodiment, the structure for displacing the entire first rotating shaft 13 from a first position P1 to a second position P2 is composed of a cam structure consisting of a first cam 25 and a first contact portion 33 provided on one end 21 of the first rotating shaft 13, and a second cam 31 and a second contact portion 35 provided on the other end 27 of the first rotating shaft 13. Thus, with a simple structure consisting of a pair of cam structures, one end 21 and the other end 27 of the first rotating shaft 13 can be simultaneously displaced from the first position P1 to the second position P2, thereby separating the first roller 9 from the second roller 11. (3) Furthermore, according to this embodiment, when the actuating part 17 stops pressing on the actuated part 19, the first cam 25 and the second cam 31 rotate due to the rotational force, displacing the first rotating shaft 13 from the first position P1 to the second position P2. As a result, when the door 7 is opened, the rotational force of the rotational force applying members 37 and 39 automatically separates the first roller 9 from the second roller 11.

[0044] (4) Furthermore, according to this embodiment, when the door 7 is closed, the slide member 41 slides, the first cam action part 43 rotates the first cam 25 against the rotational force of the first rotational force applying member 37, and at the same time, the second cam action part 45 rotates the second cam 31 against the rotational force of the second rotational force applying member 39, thereby positioning the first roller 9 at the first position P1. As a result, the entire first rotation shaft 13 can be displaced from the second position P2 to the first position P1 with a simple structure that involves sliding the slide member 41. That is, the first roller 9 can be moved to a position where the medium S can be nipped between it and the second roller 11. Also, since the slide member 41 does not rotate, it can be made smaller compared to a rotating structure.

[0045] (5) Furthermore, according to this embodiment, the surface 47 of the plate-shaped slide member 41 is arranged in a direction along the direction in which the first rotation axis 13 is displaced from the first position P1 to the second position P2. This makes it possible to reduce the size in the direction intersecting the direction of displacement compared to a structure in which the first rotation axis 13 is not arranged in a direction along the direction of displacement. (6) Furthermore, according to this embodiment, the slide member 41 slides in the axial direction of the first rotation shaft 13, so that miniaturization can be achieved while ensuring the amount of movement of the first rotation shaft 13. (7) Furthermore, according to this embodiment, when the first rotation axis 13 is displaced from the first position P1 to the second position P2, the first cam 25 rotates 51 times in the first direction, and at the same time, the second cam 31 rotates 53 times in the opposite direction to the first direction 51. That is, one rotates clockwise and the other rotates counterclockwise to displace the first rotation axis 13, so the directions of the rotational forces acting on the first rotation axis 13 are opposite and cancel each other out, allowing the first rotation axis 13 to move stably in the displacement direction.

[0046] (8) In addition, according to this embodiment, the first rotating shaft 13, the sliding member 41, and the displacement mechanism 15 having the first cam 25, the second cam 31, the first contact portion 33, and the second contact portion 35 are integrally assembled to form a unit 55. This makes it easy to attach to the main body of the device 5 and also makes it easier to miniaturize by unitizing the device. (9) Furthermore, according to this embodiment, since the part to be operated 19 is located on the rear side of the main body 5 of the device, there is less risk of the user inadvertently coming into contact with the part to be operated 19 when the door 7 is open. Also, it is easier to miniaturize the device.

[0047] [Other embodiments] The media transport device and recording device according to the present invention are based on having the configuration of the embodiments described above, but it is of course possible to make partial changes or omissions to the configuration without departing from the spirit of the present invention. [Explanation of Symbols]

[0048] 1...Media transport device, 2...Media cassette, 3...Recording unit, 4...Transport path, 5...Device body 6...Discharge section, 7...Door, 8...Second rotating shaft, 9...First roller, 10...Free end, 11...Second roller, 12...Path component, 13...First rotating shaft, 14...Path component, 15...Displacement mechanism, 16...Shaft, 17...Acting part, 18...Contact acting part, 19...Acted part 20...Arrow, 21...One end, 22...Contacting part, 23...First axis, 24...Arrow 25...First cam, 26...First sliding projection, 27...Other end, 28...Second sliding projection, 29...Second shaft, 30...Frame, 31...Second cam, 32...Window frame member, 33...First contact portion, 35...Second contact portion, 37...First rotational force applying member, 39...Second rotational force applying member, 41...Slide member, 43...First cam action part, 45...Second cam action part, 47...Surface, 51...First rotation, 53...Second rotation, 55...unit, 100...recording device, P1...1st position, P2...2nd position, S...medium

Claims

1. A first roller that transports the medium, A second roller that nips the medium together with the first roller, A first rotating shaft that rotatably supports the first roller, A displacement mechanism that displaces the first rotation axis between a first position in which the first roller and the second roller can nip the medium and a second position in which the first roller is separated from the second roller, The device body that supports the displacement mechanism, The device comprises a door that can be opened and closed using a second rotating shaft extending in a direction intersecting the first rotating shaft as a pivot point, and which is rotatable to an open position and a closed position relative to the main body of the device, The aforementioned door is equipped with an operating part, The displacement mechanism includes an actuated part, When the door is in the closed position, the actuating part is in contact with and pressing the acted-on part, and when the door rotates from the closed position to the open position and the actuating part no longer presses the acted-on part, the displacement mechanism displaces the first rotation axis from the first position to the second position. A media transport device characterized by the following features.

2. In the media transport device according to claim 1, The displacement mechanism is A first cam is provided on one end of the first rotating shaft and rotates around the first shaft, A second cam is provided on the other end of the first rotating shaft and rotates around the second shaft, A first contact portion that rotates integrally with the first cam around the first shaft and is capable of contacting one end of the first rotating shaft, It comprises a second contact portion that rotates integrally with the second cam around the second shaft and is capable of contacting the other end of the first rotation shaft, When the acting part ceases to press against the acted-on part, The first cam rotates so that the first contact portion contacts one end of the first rotating shaft, causing that one end of the first rotating shaft to move. The second cam rotates so that the second contact portion contacts the other end of the first rotating shaft, causing the other end of the first rotating shaft to move, thereby displacing the first rotating shaft from the first position to the second position. A media transport device characterized by the following features.

3. In the medium transport device according to claim 2, The first cam and the second cam are each provided with rotational force by the first rotational force applying member and the second rotational force applying member, respectively. When the acting part ceases to press against the acted part, the first cam and the second cam rotate due to the rotational force, displacing the first rotation axis from the first position to the second position. A media transport device characterized by the following features.

4. In the media transport device according to claim 3, The displacement mechanism is A slide member to which the part to be acted upon is attached, The slide member is provided with a first cam action part that rotates the first cam and a second cam action part that rotates the second cam, When the door is closed, the actuating part pushes the actuated part, causing the sliding member to slide, the first cam actuating part rotates the first cam against the rotational force of the first rotational force applying member, and simultaneously, the second cam actuating part rotates the second cam against the rotational force of the second rotational force applying member, thereby positioning the first roller in the first position. A media transport device characterized by the following features.

5. In the media transport device according to claim 4, The aforementioned sliding member is plate-shaped, The plate-shaped surface of the slide member is aligned with the direction in which the first rotation axis is displaced from the first position to the second position. A media transport device characterized by the following features.

6. In the media transport device according to claim 4 or claim 5, The slide member slides in the axial direction of the first rotation axis. A media transport device characterized by the following features.

7. In a media transport device according to any one of claims 3 to 6, When the first rotation axis is displaced from the first position to the second position, the first cam rotates a first time, and simultaneously the second cam rotates a second time in the opposite direction to the first rotation. A media transport device characterized by the following features.

8. In the media transport device according to claim 7, The first rotating shaft having the first roller, the sliding member having the actuated portion, and the displacement mechanism having the first cam, the second cam, the first contact portion, and the second contact portion are assembled via a frame to form a single unit. A media transport device characterized by the following features.

9. In a media transport device according to any one of claims 1 to 8, The aforementioned door is Located on the side of the main body of the device, The second rotation axis is located on the rear side of the device body. The front end is the free end and opens and closes. The displacement mechanism is installed along the door in the front-rear direction when it is closed. The part to be acted upon is located on the rear side of the main body of the device. A media transport device characterized by the following features.

10. A media transport device according to any one of claims 1 to 9, The device includes a recording unit that records on a medium transported by the aforementioned medium transport device. A recording device characterized by the following features.

Images