Conveyor device and printer

Abstract

To provide a conveyance device which can easily control the behavior during conveyance of a medium, and to provide a printer.SOLUTION: A conveyance device includes: a guide part which has a reference surface; and a conveyance roller which conveys a medium, and has a shaft crossing the reference surface. The conveyance roller has a roller having a protrusion part on an outer peripheral surface. The protrusion part extends in the outer peripheral surface while tilting with respect to a circumferential direction of the roller.SELECTED DRAWING: Figure 9

Description

[Technical Field]

[0001] The present disclosure relates to a conveying device and a printer. [Background technology]

[0002] It is known to use a reference surface to establish the transport position of the media.

[0003] For example, Patent Document 1 discloses a media width adjustment mechanism that includes a transport roller for transporting media along a transport path, and a transport reference surface for determining the transport position of the media by aligning the media and achieving positional accuracy. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2012-086944 Summary of the Invention [Problem to be solved by the invention]

[0005] The above-mentioned media width-shifting mechanism further includes a width-shifting roller that is provided at a predetermined angle toward the transport reference surface relative to the transport direction of the transport roller in order to shift the transport direction of the transported medium toward the transport reference surface, and a spring guide that changes the direction of the medium, whose transport direction has been changed by the width-shifting roller, back toward the transport reference surface and has an elasticity sufficient to push the medium back by the amount that it exceeds the transport reference surface when the transport force of the width-shifting roller pushes the medium beyond the transport reference surface. The elasticity of the spring guide pushes back the medium, shifting it widthwise along the reference surface and transporting it in the transport direction. However, it may be desirable to drive the transport rollers in the opposite direction to the direction of transport of the media, thereby moving the media away from the reference surface.

[0006] An object of the present disclosure is to provide a conveying device and a printer that solve the above-mentioned problems. [Means for solving the problem]

[0007] The conveying device of the present disclosure comprises a guide portion having a reference surface, and a conveying roller that conveys a medium and has an axis that intersects the reference surface, the conveying roller having a roller with a protrusion on its outer peripheral surface, the protrusion extending on the outer peripheral surface while inclined relative to the circumferential direction of the roller.

[0008] The printer of the present disclosure comprises a guide section having a reference surface, and a plurality of transport rollers that transport a medium and have axes that intersect the reference surface, each transport roller having a roller with a protrusion on its outer circumferential surface, the protrusion extending on the outer circumferential surface while inclined relative to the circumferential direction of the roller. [Effects of the Invention]

[0009] The transport device and printer according to the present disclosure make it easy to control the behavior of the medium during transport. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a perspective view I showing an example of the configuration of a conveying device according to the present disclosure. [Figure 2] 1 is a diagram illustrating an example of a conveying roller according to the present disclosure. [Figure 3] FIG. 1 is a diagram I showing an example of processing by a conveying device according to the present disclosure. [Figure 4] 11 is a diagram II showing an example of processing by the conveying device according to the present disclosure. [Figure 5] 2 is a perspective view II showing an example of the configuration of a conveying device according to the present disclosure. FIG. [Figure 6] 3 is a diagram III showing an example of processing by the conveying device according to the present disclosure. [Figure 7] IV shows an example of processing by a conveying device according to the present disclosure. [Figure 8] FIG. 1 is a diagram illustrating an example of a configuration of a conveying device according to the present disclosure. [Figure 9] 2 is a perspective view II showing an example of the configuration of a conveying device according to the present disclosure. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, each embodiment of the present disclosure will be described with reference to the drawings. Note that the drawings and specific configurations used in each embodiment should not be used to interpret the disclosure. The same or corresponding configurations in all drawings will be assigned the same reference numerals, and common descriptions will be omitted. It should be noted that in this disclosure, the drawings may relate to one or more embodiments.

[0012] First Embodiment Hereinafter, an embodiment according to the present disclosure will be described with reference to the drawings. An example of the configuration of a bolometer according to the present disclosure will be described below with reference to FIGS.

[0013] (Configuration of the transport device) The transport device 1 is used to transport a medium while determining the transport position of the medium. As shown in FIG. 1, the conveying device 1 includes a guide unit 11, a conveying roller 12, and a driven roller 13.

[0014] In the example of the present disclosure described below, the medium is described as a paper sheet. Other examples of the medium include cards, bankbooks, rolled sheets such as roll paper and linerless labels with an adhesive surface on one side, and the like. The conveying device of the present disclosure can be applied to devices having a structure with conveying rollers. For example, a printer equipped with multiple conveying rollers will be described as an example of a conveying device for conveying paper sheets. This printer may also have a duplex device to efficiently perform double-sided printing.

[0015] (Guide section configuration) The guide unit 11 has a reference surface RP. The reference surface RP is a flat surface. When the medium is shifted widthwise by a roller 121 (described later), a portion of the medium Me comes into contact with the reference surface RP. When the medium is transported in the first direction FD in this state, the medium is shifted widthwise so that it is aligned with the reference surface RP. In this way, the position of the medium is determined. At least a part of the guide portion 11 is located diagonally in front of a roller 121, which will be described later. The guide portion 11 is disposed so that the reference surface RP is positioned along the transport direction of the medium Me.

[0016] Here, the transport direction of the medium Me in this disclosure will be described. For example, the positive direction of the Y axis is defined as the first direction FD. The second direction SD is the opposite direction to the first direction FD, i.e., the negative direction of the Y axis.

[0017] 1, the guide unit 11 is located diagonally forward and to the left of the roller 121, so the direction in which the medium Me approaches the reference plane RP of the guide unit 11 is the negative direction of the X axis. Conversely, the direction in which the medium Me moves away from the reference plane RP of the guide unit 11 is the positive direction of the X axis.

[0018] For example, a printer, which is an example of the conveying device 1, includes a plurality of conveying rollers 12. For the sake of simplicity, the present disclosure will be described focusing on one transport roller 12. Each transport roller may also include a desired number of rollers 121 as needed.

[0019] (Configuration of conveyor roller) The transport rollers 12 transport the medium Me. For example, when the transport rollers 121 rotate in the NR direction (hereinafter also referred to as "forward rotation"), the transport rollers 12 transport the medium Me in a first direction FD. Conversely, when the rollers 121 rotate in the RR direction opposite the NR direction (hereinafter also referred to as "reverse rotation"), the transport rollers 12 transport the medium Me in a second direction SD. For example, the transport roller 12 is directly above the medium Me when it comes into contact with the medium Me. The transport roller 12 has a driving force. The conveying roller 12 includes a roller 121 and a shaft 122. The shaft 122 is connected to the roller 121. The transport roller 12 has an axis that intersects with the reference plane RP. That is, the axis of the shaft 122 of the transport roller 12 intersects with the reference plane RP. 2, the roller 121 has a plurality of protrusions 121p on the outer circumferential surface CS. The height of each of the protrusions 121p in the radial direction of the shaft 122 is the same. The outer surface CS is made of a friction material such as rubber, for example, silicone rubber, nitrile rubber, ethylene propylene rubber, and chloroprene rubber. The protrusion 121p extends on the outer circumferential surface CS while being inclined with respect to the circumferential direction of the roller 121. The direction in which the protrusion 121p extends is defined as a third direction TD. The contact surface of the protrusion 121p that comes into contact with the medium Me gradually changes as the medium is transported.

[0020] There is no restriction on the inclination angle of the third direction TD with respect to the circumferential direction of the roller 121. The inclination angle is set appropriately depending on the amount of movement required of the medium Me, which will be described later. The number of protrusions 121p is not limited and is set appropriately depending on the amount of movement required of the medium Me, which will be described later. There is no restriction on the distance between the protrusions 121p in the circumferential direction of the roller 121. The distance between the protrusions 121p is set appropriately depending on the amount of movement required of the medium Me, which will be described later. There is no limitation on the height of the protrusion 121p in the radial direction of the shaft 122. The height is set appropriately depending on the amount of movement required of the medium Me, which will be described later.

[0021] The corners of the protrusion 121p may be sharp corners or may have a rounded shape.

[0022] The protrusions 121p may be formed by groove machining on a cylindrical surface having a certain thickness, or may be obtained by pouring rubber, resin, or the like into a mold having an uneven outer circumferential surface CS in advance to form the roller 121 having protrusions at least on the outer circumferential surface CS.

[0023] (Configuration of driven roller) 1 again, the driven roller 13 presses the medium Me against the conveying roller 12. The driven roller 13 is biased by a spring or the like to press the medium Me. The pressing force of the driven roller 13 is variable. For example, the driven roller 13 is directly below the medium Me when it comes into contact with the medium Me. The driven roller 13 includes a roller 131 and a shaft 132 . The roller 131 of the driven roller 13 faces the roller 121 of the transport roller 12 . The roller 131 included in the driven roller 13 is driven by the rotation of the roller 121 .

[0024] The pressing force of the driven roller 13 is set appropriately depending on the amount of movement required of the medium Me, which will be described later.

[0025] (Example of conveyor processing: forward rotation) As shown in FIG. 3, for example, a conveying roller 12A of the present disclosure includes a roller 121 having a protrusion 121p extending on an outer circumferential surface CS while being inclined relative to the circumferential direction of the roller 121, two rollers 121Con, and a shaft 122. For example, the roller 121Con has a cylindrical surface. Alternatively, the roller 121Con has a protrusion 121p that is perpendicular to the circumferential direction of the roller 121Con and extends to the outer circumferential surface CS.

[0026] The number of rollers 121 relative to the rollers 121Con is set appropriately depending on the amount of movement required of the medium Me, which will be described later.

[0027] (1) For example, assume that the medium Me is being transported in the first direction FD toward the transport roller 12A. Since the conveying roller 12A has an axis that intersects with the reference plane RP, the direction in which the protrusions extend (third direction TD) and the first direction FD form an acute angle α1.

[0028] (2) When one end of the medium Me reaches the position of the transport roller 12A, the one end of the medium Me is sandwiched between the transport roller 12A and the driven roller 13. The driven roller 13 presses the medium Me against the transport roller 12A.

[0029] For example, in the present disclosure, the inclination angle of the third direction TD with respect to the circumferential direction of the roller 121 is as shown in FIGS. FIG. 4 is a diagram showing the contact surface of one of the protrusions 121p that contacts the medium Me. 4, the contact surface of the protrusion 121p that comes into contact with the medium Me gradually changes as the medium Me is conveyed. As described above, the roller 121 rotates in the NR direction, and therefore the contact surface gradually changes in the direction D1.

[0030] (4) The protrusion 121p is deformed by the pressure of the driven roller 13, and a force inclined with respect to the conveyance direction is generated. In this case, a force F1 inclined with respect to the first direction FD is generated. 4 is divided into a first direction FD and a negative direction of the X axis. Because a component of the force F1 acts on the medium Me in the negative direction of the X axis, the medium Me approaches the reference plane RP of the guide portion 11.

[0031] In this way, the transport roller 12A transports the medium Me in the first direction FD while gradually bringing the medium Me closer to the reference plane RP.

[0032] (Example of conveyor processing: Reverse) As shown in FIG. 5, the conveying roller 12A rotates the roller 121 in the RR direction (reverse rotation).

[0033] (11) For example, as shown in FIG. 6, assume that the medium Me is being transported in the second direction SD. Since the conveying roller 12 has an axis that intersects with the reference plane RP, the direction in which the protrusions extend (third direction TD) and the second direction SD form an obtuse angle α2.

[0034] (12) As shown in Figure 6, when one end of the medium Me reaches the position of the transport roller 12A, the one end of the medium Me is sandwiched between the transport roller 12A and the driven roller 13. The driven roller 13 presses the medium Me against the transport roller 12A. In this state, it is assumed that the medium Me is close to the reference surface RP.

[0035] For example, in the present disclosure, the inclination angle of the third direction TD with respect to the circumferential direction of the roller 121 is assumed to be the same as that shown in FIGS. 7, like FIG. 4, one protrusion 121p that comes into contact with the medium Me is extracted, and the contact surface of the extracted protrusion 121p is shown. 7, the contact surface of the protrusion 121p that comes into contact with the medium Me gradually changes as the medium Me is conveyed. As described above, the roller 121 rotates in the RR direction, so the contact surface gradually changes in the direction D1.

[0036] (14) The protrusion 121p is deformed by the pressure of the driven roller 13, and a force inclined with respect to the conveying direction is generated. In this case, a force F2 inclined with respect to the second direction SD is generated. 7 is divided into a component force in the second direction SD and a component force in the positive direction of the X-axis. Because a component force of the force F2 acts on the medium Me in the positive direction of the X-axis, the medium Me moves away from the reference plane RP of the guide portion 11.

[0037] In this way, the transport roller 12A transports the medium Me in the second direction SD while gradually moving the medium Me away from the reference surface RP.

[0038] (Action and effect) According to the conveyance device of the present disclosure, the roller 121 has a protrusion 121p that extends on the outer circumferential surface CS while being inclined with respect to the circumferential direction of the roller 121. As a result, when the transport roller 12 rotates forward, the medium Me can be transported while being pulled toward the reference plane RP that intersects with the axis of the transport roller 12. Furthermore, during reverse rotation, the medium Me can be transported while being separated from the reference surface RP. Therefore, the transport device according to the present disclosure makes it easy to control the behavior of the medium during transport.

[0039] (Action and effect) According to the printer of the present disclosure, the roller 121 has a protrusion 121p that extends on the outer circumferential surface CS while being inclined relative to the circumferential direction of the roller 121. As a result, when the transport roller 12 rotates forward, the medium Me can be transported while being pulled toward the reference plane RP that intersects with the axis of the transport roller 12. Furthermore, during reverse rotation, the medium Me can be transported while being separated from the reference surface RP. Therefore, the printer according to the present disclosure makes it easy to control the behavior of the medium during transport.

[0040] Next, a comparative example will be shown. In the conveyance device of Comparative Example 1, a width adjustment roller is used to adjust the width of the medium. Therefore, an increase in the number of parts has been a problem.

[0041] The conveying device of Comparative Example 2 is a printer that takes in and discharges media (referring to "paper sheets" in Comparative Example 2). When printing with a printer, it is necessary to bring the medium close to a reference surface, such as a wall, to prevent the print from becoming crooked. Therefore, when the medium is sucked in, it is desirable for the medium to be close to the reference surface. However, when the media is ejected, if the walls of the transport path inside the printer are structurally separated, the media may get caught in the joints between the walls of the transport path, causing an ejection jam. That is, it is effective to transport the medium so that it approaches the reference surface (wall) when sucking, and so that it moves away from the reference surface (wall) when discharging. Therefore, in the conveying device of Comparative Example 2, a method is used in which a rod-shaped conveying roller is tapered from one end to the other, and the difference in circumference between one end and the other end of the conveying roller is used to move the media. However, with this method, the media moves in the same direction both when suctioning and when discharging the media. Similarly, there is a method in which the diameter of multiple rollers in the axial direction of the transport roller is changed depending on the position of each roller, and the media is moved by the difference in the transport amount. However, this method also moves the media in the same direction both when suctioning and when ejecting.

[0042] In contrast to Comparative Example 1, the conveying device of the present disclosure has protrusions 121p that extend onto the outer peripheral surface CS while being inclined relative to the circumferential direction of roller 121. As a result, protrusions 121p act as resistance during conveyance, and the medium can be conveyed while generating a force that pushes the medium in the conveyance width direction. At this time, the protrusion 121p is deformed by the pressure of the driven roller 13, and a force inclined relative to the transport direction (first direction FD, second direction SD) is generated. This force controls the rotation direction (NR direction, RR direction) of the roller 121, thereby controlling the behavior of the medium Me. As a result, there is no longer a need to use alignment rollers to align the media to the width, which is expected to reduce the number of parts.

[0043] In contrast to Comparative Example 2, the conveying device of the present disclosure allows the medium Me to be conveyed while moving in any direction because the inclined shape of protrusion 121p causes the direction in which medium Me moves to differ depending on the direction of rotation of roller 121. Therefore, the medium can be transported while being brought close to the reference plane RP when being sucked in, and can be transported away from the reference plane RP when being discharged. By transporting the media while bringing it closer to the reference plane RP during suction, the tilt of the print is suppressed, which is expected to improve the print position on the media and also reduce the amount of skew. By transporting the media while moving it away from the reference surface RP when discharging, it is expected that discharge jams will be reduced.

[0044] The conveying device of the present disclosure is considered to be applicable to devices other than printers that have a structure with a conveying roller. For example, when transporting a medium in the form of a rolled sheet, such as roll paper or a linerless label with an adhesive surface on one side, the medium can be transported while being brought close to the reference surface RP by the roller 121. Furthermore, when it is desired to pull the medium back, it is possible to transport the medium while moving it away from the reference surface RP by reversing the rotation of the roller 121. As a result, the transport device of the present disclosure does not cause contact between the medium and the reference surface RP when pulling the medium back, and does not cause wrinkles in the medium.

[0045] Furthermore, the conveying device of the present disclosure "includes a guide portion 11 having a reference surface RP, and a conveying roller 12 that conveys a medium Me and has an axis that intersects the reference surface RP, and the conveying roller 12 has a roller 121 that has a protrusion 121p on its outer peripheral surface CS, and the protrusion 121p extends onto the outer peripheral surface CS while being inclined relative to the circumferential direction of the roller 121," thereby achieving the following effects. According to the conveyance device of the present disclosure, the roller 121 has a protrusion 121p that extends on the outer circumferential surface CS while being inclined with respect to the circumferential direction of the roller 121. This provides the following effect: "When the conveying roller 12 rotates forward, the medium Me can be conveyed while being pulled toward the reference plane RP that intersects with the axis of the conveying roller 12. Also, when the conveying roller 12 rotates reversely, the medium Me can be conveyed while being moved away from the reference plane RP." Therefore, the transport device of the present disclosure makes it easy to control the behavior of the medium during transport.

[0046] In addition, in the conveying device of the present disclosure, the effect of "it is easier to control the behavior of the medium when it is being conveyed" can be obtained by "the conveying roller 12 conveying the medium Me in the first direction FD while gradually bringing it closer to the reference surface RP."

[0047] In addition, in the conveying device of the present disclosure, "the conveying roller 12 conveys the medium Me in the second direction SD while gradually moving it away from the reference plane RP, and the second direction SD is the opposite direction to the first direction FD," thereby achieving the effect that "it is easier to control the behavior of the medium when it is being conveyed."

[0048] In addition, in the conveying device of the present disclosure, the effect of "the direction in which the protrusion 121p extends (third direction TD) and the first direction FD form an acute angle α1" is obtained, which "makes it easier to control the behavior of the medium when it is being conveyed."

[0049] In addition, in the conveying device of the present disclosure, the effect of "the direction in which the protrusion 121p extends (third direction TD) and the second direction SD form an obtuse angle α2" is obtained, which "makes it easier to control the behavior of the medium when it is being conveyed."

[0050] In addition, in the conveying device of the present disclosure, by "positioning at least a portion of the guide portion 11 diagonally in front of the roller," it is possible to obtain the effect that "it is possible to come into contact with the medium Me approaching the reference surface RP, making it easier to determine the position of the medium."

[0051] In addition, the conveying device of the present disclosure further includes a driven roller 13 that presses the medium Me against the conveying roller 12, which provides the effect that the pressure from the driven roller 13 deforms the protrusion 121p, making it easier for a force to be generated that is inclined relative to the conveying direction.

[0052] In addition, in the conveying device of the present disclosure, the pressing force of the driven roller 13 can be changed, which also provides the effect that the magnitude of the force acting on the medium Me that is inclined relative to the conveying direction can be easily changed.This makes it easy to change the amount of movement of the medium Me. For example, when transporting a thick medium Me such as a bankbook, a large force may be required to push the medium Me toward the reference surface RP, so it is desirable for the pressing force of the driven roller 13 to be large.

[0053] <Modification>

[0054] For example, the transport roller 12 may press the medium Me. In this case, the pressing force of the transport roller 12 may be changeable.

[0055] For example, the transport roller 12 may be directly below the medium Me when in contact with the medium Me.

[0056] For example, the protrusion 121p may be deformed due to the weight of the medium Me, and a force may be generated that is inclined relative to the transport direction.

[0057] For example, the driven roller 13 may be directly above the medium Me when in contact with the medium Me.

[0058] As shown in FIG. 8, for example, among the plurality of transport rollers 12 provided in the printer, the transport rollers located in front of the printing unit may include a plurality of rollers 121. The printer shown in FIG. 8 further includes a printing unit 14 for printing on a medium, in addition to the printer disclosed above. The conveying roller 12B located in front of the printing unit includes three rollers 121 each having a protrusion 121p extending on the outer circumferential surface CS while being inclined relative to the circumferential direction of the roller 121, and a shaft 122. In other words, all of the rollers included in the conveying roller 12B may be rollers 121. As a result, a force inclined with respect to the transport direction is generated in each roller 121. Therefore, since all rollers included in the transport roller 12B are rollers 121, it becomes easier to bring the medium Me closer to the reference surface RP and to move the medium Me away from the reference surface RP.

[0059] Third Embodiment Hereinafter, an embodiment according to the present disclosure will be described with reference to the drawings. An example of the configuration of the transport device according to the present disclosure will be described below with reference to FIG.

[0060] (composition) The conveying device 1m comprises a guide section 11m having a reference surface, and a conveying roller 12m that conveys the medium and has an axis that intersects the reference surface, and the conveying roller 12m has a roller 121m that has a protrusion on its outer peripheral surface, and the protrusion extends on the outer peripheral surface while inclined relative to the circumferential direction of the roller 121m.

[0061] (Action and effect) According to the conveyance device 1m of the present disclosure, the roller 121m has a protrusion extending from the outer circumferential surface while being inclined with respect to the circumferential direction of the roller 121m. As a result, when the transport roller 12m rotates forward, the medium can be transported while being pulled toward the reference plane that intersects with the axis of the transport roller 12m. When the transport roller 12m rotates reversely, the medium can be transported while being moved away from the reference plane. Therefore, the transport device according to the present disclosure makes it easy to control the behavior of the medium during transport.

[0062] Although the present disclosure has been described above with reference to the embodiments, the present disclosure is not limited to the above-described embodiments. Various modifications that can be understood by those skilled in the art can be made to the configuration and details of the present disclosure within the scope of the present disclosure. Furthermore, each embodiment can be combined with other embodiments as appropriate.

[0063] A part or all of the above-described embodiments can be described as, but not limited to, the following supplementary notes.

[0064] (Appendix 1) a guide portion having a reference surface; a conveying roller that conveys a medium and has an axis that intersects the reference plane; Equipped with the conveying roller has a roller having a protrusion on its outer circumferential surface, The protrusion extends on the outer circumferential surface while being inclined with respect to the circumferential direction of the roller. Conveying device.

[0065] (Appendix 2) The transport roller transports the medium in a first direction while gradually bringing the medium closer to the reference surface. 10. The conveying device of claim 1.

[0066] (Appendix 3) the transport roller transports the medium in a second direction while gradually moving the medium away from the reference surface; The second direction is opposite to the first direction. 10. The conveying device of claim 2.

[0067] (Appendix 4) The direction in which the protrusion extends and the first direction form an acute angle. 4. The conveying device according to claim 2 or 3.

[0068] (Appendix 5) The extending direction of the protrusion and the second direction form an obtuse angle. 4. The conveying device of claim 3.

[0069] (Appendix 6) At least a part of the guide portion is positioned diagonally in front of the roller. 6. A conveying device according to any one of claims 1 to 5.

[0070] (Appendix 7) The medium is further provided with a driven roller that presses the medium against the conveying roller. 7. The conveying device according to any one of claims 1 to 6.

[0071] (Appendix 8) The pressure of the driven roller is variable 8. The conveying device of claim 7.

[0072] (Appendix 9) a guide portion having a reference surface; a plurality of conveying rollers that convey a medium and have axes that intersect the reference plane; Equipped with Each of the conveying rollers has a roller having a protrusion on its outer circumferential surface, The protrusion extends on the outer circumferential surface while being inclined with respect to the circumferential direction of the roller. Printer.

[0073] (Appendix 10) a printing unit that prints on the medium; Furthermore, The conveying roller located in front of the printing unit has a plurality of rollers. 10. The printer according to claim 9. [Explanation of symbols]

[0074] 1. Conveyor device 11 Guide section 12 Conveyor roller 12A Conveyor roller 12B Conveyor roller 121 Laura 121p protrusion 121Con Laura 122 Shaft 13 Driven roller 1m conveyor 11m guide section 12m conveyor roller 121m Laura 131 Laura 132 Shaft 14 Printing section CS outer surface FD first direction SD Second Direction TD third direction Me medium RP reference plane α1 acute angle α2 obtuse angle

Claims

1. a guide portion having a reference surface; a conveying roller that conveys a medium and has an axis that intersects the reference plane; Equipped with the conveying roller includes a roller having a plurality of protrusions on an outer peripheral surface thereof and a second roller; Each protrusion extends on the outer circumferential surface while being inclined with respect to the circumferential direction of the roller, the second roller has a cylindrical surface or a second protrusion, the second protrusion is perpendicular to the circumferential direction of the second roller and extends to a second outer peripheral surface of the second roller; the transport roller transports the medium in a first direction while gradually bringing the medium closer to the reference surface; the transport roller transports the medium in a second direction while gradually moving the medium away from the reference surface; The second direction is opposite to the first direction. Conveying device.

2. a guide portion having a reference surface; a plurality of conveying rollers that convey a medium and have axes that intersect the reference plane; Equipped with Each conveying roller includes a roller having a plurality of protrusions on an outer peripheral surface thereof and a second roller; Each protrusion extends on the outer circumferential surface while being inclined with respect to the circumferential direction of the roller, the second roller has a cylindrical surface or a second protrusion, the second protrusion is perpendicular to the circumferential direction of the second roller and extends to a second outer peripheral surface of the second roller; Each transport roller transports the medium in a first direction while gradually bringing the medium closer to the reference surface, each conveying roller conveys the medium in a second direction while gradually moving the medium away from the reference surface; The second direction is opposite to the first direction. Printer.

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