recording device

Abstract

The present invention relates to a recording apparatus for solving a problem that the quality of an image formed on a medium is degraded due to a skew correction operation of a gate portion. A printer is provided with: a curved path that transports a medium toward a line head; a pair of transport rollers that are provided on the curved path, pinch the medium at a pinch position by a driving roller and a driven roller, and transport the medium; and a gate portion that has a contact surface, and that is capable of being in a contact position located on the curved path closer to an upstream side of a transport direction than the pinch position when the medium is transported in the transport direction, and a retreat position not in contact with the medium; and a guide portion that constitutes the curved path and guides a leading end of the medium being transported to the contact surface in the contact position.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to a recording apparatus. BACKGROUND

[0002] In Patent Literature 1, there is disclosed an image forming apparatus provided with an image forming unit that forms an image on a sheet as an example of a medium, a pair of conveyance rollers that conveys the sheet to the image forming unit, a shutter member that is an example of a gate portion, and a sheet conveyance route that is provided on an upstream side of the pair of conveyance rollers, and that corrects skew of the sheet by bringing a leading end of the sheet being conveyed into contact with the shutter member and causing the leading end of the sheet to follow the shutter member. The image forming unit is an example of a recording portion that performs recording on a medium, the shutter member is an example of a gate portion, and the sheet conveyance route is an example of a conveyance path. The pair of conveyance rollers is composed of a conveyance roller and a conveyance roll.

[0003] Patent Literature 1: Japanese Patent Application Laid-Open (JP A) No. 9-183539

[0004] When a surface of the conveyance roll and a surface of the conveyance roller, which are closer to an upstream side in the conveyance direction than a position at which the shutter member comes into contact with the leading end of the sheet, are taken as upstream side surfaces, the sheet conveyance route of Patent Literature 1 opens toward the upstream side surface of the conveyance roll and the upstream side surface of the conveyance roller. Therefore, in the sheet being conveyed in the sheet conveyance route, there is a possibility that an area in which the leading end of the sheet comes into contact with the upstream side surface of the conveyance roll before coming into contact with the shutter member, and an area in which the leading end of the sheet comes into contact with the upstream side surface of the conveyance roller before coming into contact with the shutter member, are generated in the width direction of the sheet. In this case, there is a possibility that the quality of an image formed on the sheet is degraded due to a skew correction operation of the sheet by the shutter member. SUMMARY

[0005] The recording device includes: a recording section that performs recording on a medium; a conveyance path that conveys the medium to the recording section; a pair of conveyance rollers that has a first roller and a second roller disposed on the conveyance path, conveys the medium to the recording section by sandwiching the medium with the first roller and the second roller; a gate section that has a contact surface, the gate section being capable of being in a push-up state and a retreat state, the push-up state being a state in which the contact surface is located at a contact position on the conveyance path that is closer to an upstream of a conveyance direction than a sandwiching position at which the pair of conveyance rollers sandwiches the medium, and contacts a leading end of the medium being conveyed, the retreat state being a state in which the contact surface retreats from the contact position; and a guide section that constitutes the conveyance path and guides the leading end of the medium being conveyed to the contact surface located at the contact position, the guide section protruding more toward a radial direction of the first roller than an outer circumference of the first roller, as viewed in a direction along an axis of rotation of the first roller.

[0006] The recording device includes: a recording section that performs recording on a medium; a conveyance path that conveys the medium to the recording section; a pair of conveyance rollers that has a first roller and a second roller disposed on the conveyance path, conveys the medium to the recording section by sandwiching the medium with the first roller and the second roller; a gate section that has a contact surface, the gate section being capable of being in a push-up state and a retreat state, the push-up state being a state in which the contact surface is located at a contact position on the conveyance path that is closer to an upstream of a conveyance direction than a sandwiching position at which the pair of conveyance rollers sandwiches the medium, and contacts a leading end of the medium being conveyed, the retreat state being a state in which the contact surface retreats from the contact position, the medium being conveyed in an orientation in which a first face recorded by the recording section contacts the first roller, the first roller being a toothed roller having a plurality of teeth capable of point-contacting the medium. BRIEF DESCRIPTION OF DRAWINGS

[0007] Figure 1 is a view that shows an entire conveyance route of a printer.

[0008] Figure 2 is a view that shows a main part of a curved path.

[0009] Figure 3 is a perspective view that shows a main part of a curved path.

[0010] Figure 4 is a view that shows a main part of a curved path. Figure 3A perspective view of the main portion of the curved path in a state after the driven roller is removed.

[0011] Figure 5 A view of the main portion of the curved path as viewed from the left side of the printer.

[0012] Figure 6 A perspective view of the drive roller and the gate portion.

[0013] Figure 7 A view of the main portion d7 shown in Fig. Figure 4 An enlarged perspective view of the main portion d7 shown in Fig.

[0014] Figure 8 A view of the main portion s8-s8 shown in Fig. Figure 5 A sectional view of the s8-s8 section shown in Fig.

[0015] Figure 9 A view of the main portion s9-s9 shown in Fig. Figure 5 A sectional view of the s9-s9 section shown in Fig.

[0016] Figure 10 A sectional view of the main portion of the curved path in a state where the gate portion is in the advancing state.

[0017] Figure 11 A sectional view of the main portion of the curved path in a state where the gate portion is in the advancing state.

[0018] Figure 12 A sectional view of the main portion of the curved path in a state where the gate portion is in the retreating state.

[0019] Figure 13 A plan view of the medium in a state where the leading end is in contact with the gate portion.

[0020] Figure 14 A plan view of the medium in a state where the skew is corrected.

[0021] Figure 15 A sectional view of the main portion of the curved path in a state where the gate portion is in the advancing state in another embodiment.

[0022] Figure 16 A sectional view of the main portion of the curved path in a state where the gate portion is in the retreating state in another embodiment.

[0023] Figure 17 A sectional view of the main portion of the curved path in a state where the gate portion is in the advancing state in another embodiment.

[0024] Figure 18 A sectional view of the main portion of the curved path in a state where the gate portion is in the retreating state in another embodiment.

[0025] Explanation of Reference Numerals

[0026] 1: printer; 2: device main body; 3: first medium cassette; 4: second medium cassette; 5: third medium cassette; 6: additional unit; 8: discharge tray; 10: medium conveying device; 11: waste liquid accommodating portion; 12a: ink accommodating portion; 13: conveying belt; 14, 15: pulley; 19: feed roller; 20: separation roller; 21, 22, 23: pickup roller; 25, 26, 27: feed roller pair; 28, 29, 30, 31, 32A, 33, 34, 35, 38: conveying roller pair; 36, 39: drive roller; 37, 40: driven roller; 39a, 40a: rotation shaft; 39b: cylindrical portion; 39c: tooth; 39d, 40d: peripheral surface; 41, 42: baffle; 45: head unit; 46: line head; 48: medium detection portion; 50: gate portion; 52: moving member; 52a: contact portion; 52b: contact surface; 52g: guide portion; 52s: support portion; 53: link member; 57: switching portion; 58: solenoid; 58a: plunger; 65: outer side path forming portion; 65a: outer side path forming surface; 67: inner side path forming portion; 67a: inner side path forming surface; 71: first guide portion; 72: base surface; 73: rib; 74: guide portion; 75: upstream side guide portion; 76: downstream side guide portion; 81: intermediate guide portion; 81a: guide surface; 82: second guide portion; 82a: guide surface; 90: control portion; K1: branch position; T: conveying route; TO: curved path; T1: recording-time conveying path; T2: turning path; T3: reversing path; T4: feeding path; P: medium; Pef: leading end; PC: contact position; PE: retreat position; PN: pinch position. DETAILED DESCRIPTION

[0027] Hereinafter, the present disclosure will be described based on embodiments. In each drawing, the same symbol is attached to the same component, and the repeated description is omitted. Note that in the present specification, "the same" or "identical" means not only the case where they are completely the same, but also the case where they are the same considering the measurement error, the case where they are the same considering the manufacturing variation of the component, and the case where they are the same within a range that does not impair the function. Therefore, for example, "the sizes of both are the same" means that the sizes of both are within ±10% of one size, more preferably within ±5%, and particularly preferably within ±3%, considering the measurement error and the manufacturing variation of the component.

[0028] In addition, in each drawing, X, Y, and Z represent three mutually orthogonal spatial axes. In the present specification, the directions along these axes are set as the X-axis direction, the Y-axis direction, and the Z-axis direction. In the case of determining the orientation, the positive direction is " + " and the negative direction is " - ", and in the direction notation, the direction of the arrow in each drawing is described as the + direction and the opposite direction of the arrow is described as the - direction.

[0029] In addition, the Z-axis direction indicates the direction of gravity. In addition, a plane including the X-axis and the Y-axis is referred to as an X-Y plane, a plane including the X-axis and the Z-axis is referred to as an X-Z plane, and a plane including the Y-axis and the Z-axis is referred to as a Y-Z plane. In addition, the X-Y plane is a horizontal plane. Furthermore, the spatial axes of three X, Y, and Z, which are not limited to positive and negative directions, are referred to as the X-axis, the Y-axis, and the Z-axis.

[0030] 1. Embodiment 1

[0031] In the present embodiment, the printer 1 is configured as an inkjet printer that performs recording by ejecting ink, which is an example of a liquid, onto a medium P, which is represented by recording paper. The printer 1 is an example of a recording device. In addition, the configuration of the line head 46 described later is omitted from the printer 1, and the printer 1 can be referred to as a medium conveying device 10. However, even if the line head 46 is provided, the printer 1 can be understood as the medium conveying device 10 if attention is paid to the conveying of the medium P.

[0032] Note that, in each drawing, the Y-axis direction is a direction that intersects the conveying direction of the medium P, that is, the medium width direction, and is also the device depth direction. The +Y direction in the Y-axis direction is a direction from the front surface of the device toward the back surface of the device, and the -Y direction is a direction from the back surface of the device toward the front surface of the device. The X-axis direction is the device width direction, and from the perspective of the operator of the printer 1, the +X direction is the left side, and the -X direction is the right side. The Z-axis direction is the device height direction, the +Z direction is the upward direction, and the -Z direction is the downward direction.

[0033] Hereinafter, the direction in which the medium P is conveyed is sometimes referred to as the "downstream", and the opposite direction thereof is sometimes referred to as the "upstream". In addition, in the Figure 1 conveying route T is shown by a dashed line. In the printer 1, the medium P is conveyed through the conveying route T shown by the dashed line.

[0034] In addition, the F-axis direction is the conveying direction of the medium in the recording region between the line head 46 described later and the conveying belt 13, the +F direction is the downstream of the conveying direction, and the opposite -F direction is the upstream of the conveying direction. In addition, the V-axis direction is the moving direction of the head unit 45, the +V direction in the V-axis direction is the direction in which the head unit 45 moves away from the conveying belt 13, and the -V direction is the direction in which the head unit 45 moves toward the conveying belt 13.

[0035] As shown in FIG. 1, the printer 1 includes a main body 11, a head unit 45, a conveying belt 13, a medium conveying device 10, and a control device 20. Figure 1As shown, the printer 1 is configured to have the first cassette 3 that houses the media P in the lower portion of the device main body 2, and to be able to join the additional unit 6 on the lower side of the device main body 2. In the case where the additional unit 6 is joined, the second cassette 4 and the third cassette 5 are located below the first cassette 3. The media P fed out from each cassette is transported inside the printer 1 along the transport route T shown by a dotted line. The first cassette 3, the second cassette 4, and the third cassette 5 are examples of media housing portions.

[0036] With respect to the first cassette 3, the second cassette 4, and the third cassette 5, the pickup rollers 21, 22, 23 that feed out the housed media P in the -X direction are provided.

[0037] Further, the feeding roller pairs 25, 26, 27 feed the media P fed out in the -X direction obliquely upward. The feeding roller pairs 25, 26, 27 are provided with respect to the first cassette 3, the second cassette 4, and the third cassette 5, respectively. Note that, hereinafter, the so-called "roller pair" is constituted by a driving roller driven by a motor not shown and a driven roller that rotates in response to contact with the driving roller, unless otherwise specified.

[0038] The media P fed out from the third cassette 5 is transported to the transport roller pair 35 by the transport roller pair 29, 28. Further, the media fed out from the second cassette 4 is transported to the transport roller pair 35 by the transport roller pair 28. The media is transported to the transport roller pair 38 by the transport roller pair 35. Hereinafter, the section of the transport route T from the transport roller pair 35 to the transport roller pair 38 will be referred to as a curved path TO. The curved path TO constitutes a part of the transport route T. Further, the curved path TO is an example of a transport path. The curved path TO is a section in which the media P is curved in a manner that protrudes in the -Z direction.

[0039] Note that the transport roller pair 35 is constituted by a driving roller 36 driven by a motor not shown and a driven roller 37 that can rotate in response to driving. Further, the transport roller pair 38 is constituted by a driving roller 39 driven by a motor not shown and a driven roller 40 that can rotate in response to driving.

[0040] Note that the media P fed out from the first cassette 3 is transported to the transport roller pair 38 without passing through the transport roller pair 35. Further, the feed roller 19 and the separation roller 20 provided in the vicinity of the transport roller pair 35 are roller pairs that feed out the media P from a feed tray not shown.

[0041] The media P that receives a transport force from the transport roller pair 38 is transported to a recording position between the line head 46 and the transport belt 13, that is, opposite the line head 46. The line head 46 is an example of a recording portion. Note that, hereinafter, the section of the transport route T from the transport roller pair 38 to the transport roller pair 30 will be referred to as a recording-time transport path Tl. The recording-time transport path Tl constitutes a part of the transport route T.

[0042] The line head 46 constitutes the head unit 45. The line head 46 ejects ink toward the face of the medium P to perform recording. The line head 46 is an inkjet head configured to eject ink over the entire area of the medium width direction, and is configured to be able to perform recording over the entire area of the medium width direction without accompanying movement in the medium width direction. However, the inkjet head is not limited thereto, and can be of a type mounted on a carriage to eject ink while moving in the medium width direction.

[0043] The head unit 45 is disposed so as to be able to advance and retreat with respect to the recording-time conveyance path T1, and is disposed so as to be able to displace between a recording position shown by a solid line in FIG. 1, and a retreat position shown by a double-dot chain line and a symbol 45-1 in FIG. 1, which is the farthest retreat position from the conveyance belt 13. Figure 1 Figure 1 The head unit 45 is disposed so as to be able to advance and retreat with respect to the recording-time conveyance path T1, and is disposed so as to be able to displace between a recording position shown by a solid line in FIG. 1, and a retreat position shown by a double-dot chain line and a symbol 45-1 in FIG. 1, which is the farthest retreat position from the conveyance belt 13.

[0044] The ink storage portions 12a, 12b, 12c, and 12d store ink. Ink ejected from the line head 46 is supplied to the line head 46 from each of the ink storage portions 12a, 12b, 12c, and 12d via a pipe not shown. Each of the ink storage portions 12a, 12b, 12c, and 12d is detachably disposed. In addition, the waste liquid storage portion 11 stores ink as a waste liquid ejected from the line head 46 to a flushing cover not shown for maintenance.

[0045] The conveyance belt 13 is an endless belt wound around a pulley 14 and a pulley 15, at least one of which is rotated by a motor not shown. The medium P is conveyed to a position opposite the line head 46 while being adsorbed to the belt surface of the conveyance belt 13. The adsorption of the medium P to the conveyance belt 13 can employ an adsorption method such as an air suction method or an electrostatic adsorption method.

[0046] Here, the recording-time conveyance path T1 at the position opposite the line head 46 is configured to convey the medium P upward at an angle with respect to the horizontal direction and the vertical direction. This upward conveyance direction is a direction including a -X direction component and a +Z direction component in the Figure 1 In the present embodiment, the recording-time conveyance path T1 is set to an inclination angle in the range of 65° to 85° with respect to the horizontal direction, and more specifically, to an inclination angle of substantially 75°.

[0047] ​The medium P on which recording has been performed by the line head 46 on the first surface is further conveyed upward by the conveying roller pair 30 located downstream of the conveying belt 13. A flap 41 is provided downstream of the conveying roller pair 30, and the conveying direction of the medium P is switched by the flap 41. In the case of directly discharging the medium P, the conveying route T of the medium P is switched by the flap 41 to the conveying roller pair 31 toward the upper side, and the medium P is discharged toward the discharge tray 8 by the conveying roller pair 31.

[0048] In the case of performing recording on the second surface in addition to the first surface of the medium P, the conveying direction of the medium P is switched by the flap 41 toward the branch position Kl. Then, the medium P passes through the branch position Kl, and enters the turning path T2. In the present embodiment, the turning path T2 is an interval of the conveying route T from the branch position Kl to the upper side. The conveying roller pair 32A, 32B is provided on the turning path T2. The medium P that has entered the turning path T2 is conveyed upward by the conveying roller pair 32A, 32B, and when the lower edge of the medium P passes through the branch position Kl, the rotation direction of the conveying roller pair 32A, 32B is switched, whereby the medium P is conveyed downward.

[0049] The reversal path T3 is connected to the turning path T2. In the present embodiment, the reversal path T3 is a path interval from the branch position Kl to the conveying roller pair 35 via the conveying roller pair 33, 34. The reversal path T3 is connected to the curved path TO, whereby the medium P conveyed downward from the branch position Kl reaches the conveying roller pair 35 from the conveying roller pair 33, 34 by the conveying force, and is conveyed by the conveying roller pair 35 to the conveying roller pair 38.

[0050] By the reversal path T3 and the curved path TO, the second surface of the medium P, which is the surface opposite to the first surface as the recorded surface, is oriented upward. In other words, in the case of performing recording on the second surface in addition to the first surface of the medium P, in the curved path TO, the medium P on which the first surface has been recorded by the line head 46 is conveyed with the first surface in contact with the peripheral surface 39d of the driving roller 39 of the conveying roller pair 38 described later, toward the line head 46. The second surface of the medium P conveyed to the position opposite to the line head 46 by the reversal path T3 is opposite to the line head 46. Thus, it is possible to record the second surface of the medium P by the line head 46.

[0051] The flap 42 is provided so as to be rotatable about a rotation axis. The flap 42 is normally in a posture in which the medium P advancing in the reversal path T3 is guided to the conveying roller pair 35. In contrast, the medium P fed from the second medium cassette 4 or the third medium cassette 5 below the conveying roller pair 35 reaches the conveying roller pair 35 by pushing the flap 42 upward.

[0052] Further, a feeding path T4 is connected to the curved path TO. In the present embodiment, the feeding path T4 is a path section from the first medium cassette 3 to the curved path TO via the feeding roller pair 25. The feeding path T4 feeds the medium P from the first medium cassette 3 to the curved path TO. The medium P fed out from the first medium cassette 3 reaches the convey roller pair 38 via the feeding path T4 and a path in the curved path TO that is closer to the downstream side of the convey direction than the connection position of the feeding path T4 and the curved path TO. The medium P that has reached the convey roller pair 38 is conveyed by the convey roller pair 38 to the recording-time convey path T1 that is downstream in the convey direction. The convey roller pair 38 is an example of a conveyance unit.

[0053] Next, the configuration of the curved path TO is described. As shown in FIG. 7, the inner side of the curved path TO is formed by an inner side path forming portion 67 and a first guide portion 71, and the outer side is formed by an outer side path forming portion 65, an intermediate guide portion 81, and a second guide portion 82. The inner side path forming portion 67 forms a face, i.e., an inner side path forming face 67a, of the inner side of the curved path TO. The outer side path forming portion 65 forms a face, i.e., an outer side path forming face 65a, of the outer side of the curved path TO. Figure 2

[0054] The first guide portion 71 is continuously provided on the convey direction downstream side of the inner side path forming portion 67. The first guide portion 71 forms a face of the inner side of the curved path TO that faces the inner side path forming face 67a of the inner side path forming portion 67 in the convey direction toward the convey roller pair 38, and a portion of the recording-time convey path T1 that is downstream in the convey direction of the convey roller pair 38. The drive roller 39 that constitutes the convey roller pair 38 and the gate portion 50 are provided in the first guide portion 71. The first guide portion 71 has a rib 73. The rib 73 supports the medium P by contacting the medium P being conveyed.

[0055] In a direction that intersects the convey direction and the Y-axis direction, which is the depth direction DF of the convey route T including the curved path TO and the recording-time convey path T1, the axis center of the rotation shaft 39a of the drive roller 39 is provided on the first guide portion 71 side with respect to the convey route T, and further from the convey route T than the face of the inner side of the convey route T constituted by the rib 73 of the first guide portion. In other words, the rotation shaft 39a of the drive roller 39 is provided on the first guide portion 71 side with respect to the curved path TO in the depth direction DF of the convey route T, and further from the curved path TO than the rib 73 of the first guide portion.

[0056] ​An intermediate guide portion 81 is provided downstream of the outer path forming portion 65 in the conveying direction. The intermediate guide portion 81 has a guide surface 81a. The guide surface 81a forms a surface in the conveying direction that extends from the outer path forming surface 65a of the outer path forming portion 65 toward the outer side of the curved path T0 of the second guide portion 82. A medium detection portion 48 is provided on the intermediate guide portion 81. A feed path T4 connected to the curved path T0 is formed between the intermediate guide portion 81 and the outer path forming portion 65.

[0057] The second guide section 82 is continuously disposed downstream of the intermediate guide section 81 in the conveying direction. The second guide section 82 has a guide surface 82a. The guide surface 82a is formed in the conveying direction from the guide surface 81a of the intermediate guide section 81 toward the outer side of the curved path T0 of the conveyor roller pair 38. In addition, the second guide section 82 is formed as part of the recording conveying path T1 downstream of the conveyor roller pair 38 in the conveying direction. A driven roller 40 constituting the conveyor roller pair 38 is disposed in the second guide section 82.

[0058] The axis center of the driven roller 40's rotating shaft 40a is located on the side of the second guide 82 in the depth direction DF of the conveying path T relative to the bending path T0, and is positioned further away from the bending path T0 than the guide surface 82a of the second guide.

[0059] like Figures 3 to 6 , Figure 13 , Figure 14 As shown, multiple drive rollers 39 constituting the conveying roller pair 38 arranged on the curved path T0 are arranged at predetermined intervals along the Y-axis direction, which is the axis of rotation 39a, i.e., the media width direction. The symbol CL denotes the center position in the width direction of the conveying path T, and the drive rollers 39 are arranged in a left-right symmetrical structure relative to the center position CL. In this embodiment, four drive rollers 39 are arranged on the left and four on the right sides relative to the center position CL. The drive roller 39 is an example of the first roller.

[0060] like Figure 3 , Figure 5 As shown, multiple driven rollers 40 constituting the conveyor roller pair 38 are arranged at predetermined intervals along the axial direction of the rotation axis 40a, i.e., the media width direction, opposite to the drive roller 39. Thus, the conveyor roller pair 38 is positioned on the curved path T0, allowing the media P to be clamped by the drive roller 39 and driven rollers 40, and conveyed towards the traveling head 46. The driven rollers 40 are arranged in a left-right symmetrical configuration relative to the center position CL. In this embodiment, four driven rollers 40 are arranged on each of the left and right sides relative to the center position CL. The circumferential surface 40d of the driven rollers 40 in this embodiment is formed by an elastic member. The driven roller 40 is an example of a second roller.

[0061] likeFigure 7 、 Figure 8 As shown in FIG. 6, the drive roller 39 has a plurality of teeth 39c protruding outward from the cylindrical portion 39b of the drive roller 39. The drive roller 39 is an example of a toothed roller. The teeth 39c provided on the cylindrical portion 39b of the drive roller 39 are provided in a manner that forms a row in the circumferential direction of the drive roller 39 that rotates together with the rotation axis 39a, and a plurality of rows are arranged in the Y-axis direction. The teeth 39c provided on the cylindrical portion 39b of the drive roller 39 are configured so that the teeth 39c in the circumferential direction of the drive roller 39, as viewed in the direction along the Y-axis direction, are equally spaced.

[0062] The drive roller 39 conveys the medium P by the tips of the teeth 39c provided on the cylindrical portion 39b contacting the medium P. The plurality of teeth 39c provided on the drive roller 39 are capable of point contact with the medium P. As shown by the double-dotted chain line in FIG. 6, the tips of the plurality of teeth 39c capable of point contact with the medium P form a peripheral surface 39d of the drive roller 39 that is capable of contact with the medium P. In other words, the drive roller 39 is a toothed roller having a plurality of teeth 39c capable of point contact with the medium P, and the plurality of teeth 39c form a peripheral surface 39d centered on the rotation axis 39a of the drive roller 39. Note that the peripheral surface 39d of the drive roller 39 can also be referred to as the outer periphery of the drive roller 39. Figure 8

[0063] On the peripheral surface 39d of the drive roller 39, if the tips of the teeth 39c provided on the drive roller 39 are formed as protrusions capable of contact with the medium P, then the valleys between the tips of the teeth 39c provided on the drive roller 39 become recesses that do not contact the medium P. Therefore, the peripheral surface 39d of the drive roller 39 has more protrusions and recesses than the peripheral surface 40d of the driven roller 40. Therefore, the numerical value of the surface roughness of the peripheral surface 39d is greater than the numerical value of the surface roughness of the peripheral surface 40d.

[0064] As shown in FIG. 6, the gate portion 50 is provided on the curved path TO. The gate portion 50 has a moving member 52. The moving member 52 is provided so as to be rotatable with respect to the rotation axis 39a of the drive roller 39. In other words, the gate portion 50 is provided so as to be rotatable with respect to the rotation axis 39a of the drive roller 39. Figure 2

[0065] As shown in FIG. 6, the gate portion 50 is provided on the curved path TO. The gate portion 50 has a moving member 52. The moving member 52 is provided so as to be rotatable with respect to the rotation axis 39a of the drive roller 39. In other words, the gate portion 50 is provided so as to be rotatable with respect to the rotation axis 39a of the drive roller 39. Figures 3 to 6 ​​As shown, the moving members 52 are provided at a prescribed interval in the Y-axis direction. The moving members 52 are arranged in a manner that becomes a left-right symmetrical structure with respect to the center position CL. In the present embodiment, three moving members 52 are arranged on the left side and the right side with respect to the center position CL, respectively. The plurality of moving members 52 are mounted on a link member 53 that is able to rotate coaxially with the rotation shaft 39a, and all of the moving members 52 rotate simultaneously by the rotation of the link member 53. A switching section 57 is connected to an end portion of the link member 53 in the -Y direction.

[0066] The switching section 57 links the link member 53 and a plunger 58a of a solenoid 58. The switching section 57 converts a linear movement of the plunger 58a in the Y-axis direction due to energization of the solenoid 58 into a rotational movement of the link member 53 with the rotation shaft 39a as the center. When the plunger 58a is moved in the -Y direction by driving the solenoid 58, the link member 53 rotates in the clockwise direction with the rotation shaft 39a as the center, as viewed from the -Y direction side to the +Y direction side. Thus, the moving members 52 rotate in the clockwise direction with the rotation shaft 39a as the center, as viewed from the -Y direction side to the +Y direction side.

[0067] The link member 53 is pressed in the counterclockwise direction by a pressing force of a spring not shown. Thus, when the plunger 58a is moved in the +Y direction by stopping the energization of the solenoid 58, the link member 53 rotates in the counterclockwise direction with the rotation shaft 39a as the center, as viewed from the -Y direction side to the +Y direction side. Thus, the moving members 52 rotate in the counterclockwise direction with the rotation shaft 39a as the center, as viewed from the -Y direction side to the +Y direction side, and the gate section 50 becomes a pushing state described later.

[0068] Note that a control section 90 that controls the solenoid 58 controls the movement of the solenoid 58, i.e., the advancing and retreating movement of the contact section 52a, in accordance with a detection signal of a medium detection section 48 provided on an intermediate guide section 81 near the upstream side of the convey roller pair 38. Note that the control section 90 performs various controls such as conveyance of the medium P in the printer 1, skew correction movement, recording, and the like in addition to the control of the solenoid 58.

[0069] As shown in Figs. 6A and 6B, the contact section 52a is formed on the moving member 52. The gate section 50 is pushed by the contact section 52a in the pushing state of the curved path TO as shown in Figs. 6A and 6B, and the pushing state of the curved path TO as shown in Figs. 6C and 6D. Figure 3 Figure 4 Figures 6 to 14 As shown in Figs. 6A and 6B, the contact section 52a is formed on the moving member 52. The gate section 50 is pushed by the contact section 52a in the pushing state of the curved path TO as shown in Figs. 6A and 6B, and the pushing state of the curved path TO as shown in Figs. 6C and 6D. Figure 2 Figure 4 Figures 7 to 10 Figure 13 Figure 14 As shown in Figs. 6A and 6B, the contact section 52a is formed on the moving member 52. The gate section 50 is pushed by the contact section 52a in the pushing state of the curved path TO as shown in Figs. 6A and 6B, and the pushing state of the curved path TO as shown in Figs. 6C and 6D. Figure 3 Figure 12 ​​​​​​​The contact portion 52a is switched between a retreat state in which the contact portion 52a retreats from the curved path TO as illustrated. A contact surface 52b that can contact the leading end Pef of the medium P is provided on the contact portion 52a. The contact surface 52b is a surface on the upstream side in the conveyance direction of the contact portion 52a. In a case where the gate portion 50 is in the advanced state, the leading end Pef of the medium P contacts the contact surface 52b.

[0070] As illustrated in FIG. 6, the position of the contact surface 52b when the gate portion 50 is in the advanced state is set as a contact position PC, and as illustrated in FIG. 7, the contact surface 52b retreats from the contact position PC, and the position of the contact surface 52b when the gate portion 50 is in the retreated state is set as a retreat position PE. Figures 8 to 10 Figure 12 As illustrated in FIG. 6, the position of the contact surface 52b when the gate portion 50 is in the advanced state is set as a contact position PC, and as illustrated in FIG. 7, the contact surface 52b retreats from the contact position PC, and the position of the contact surface 52b when the gate portion 50 is in the retreated state is set as a retreat position PE. Figures 8 to 10 As illustrated in FIG. 6, the position of the contact surface 52b when the gate portion 50 is in the advanced state is set as a contact position PC, and as illustrated in FIG. 7, the contact surface 52b retreats from the contact position PC, and the position of the contact surface 52b when the gate portion 50 is in the retreated state is set as a retreat position PE.

[0071] Figure 12 As illustrated in FIG. 6, the position of the contact surface 52b when the gate portion 50 is in the advanced state is set as a contact position PC, and as illustrated in FIG. 7, the contact surface 52b retreats from the contact position PC, and the position of the contact surface 52b when the gate portion 50 is in the retreated state is set as a retreat position PE.

[0072] As illustrated in FIG. 6, the position of the contact surface 52b when the gate portion 50 is in the advanced state is set as a contact position PC, and as illustrated in FIG. 7, the contact surface 52b retreats from the contact position PC, and the position of the contact surface 52b when the gate portion 50 is in the retreated state is set as a retreat position PE. Figure 10 As illustrated in FIG. 6, the position of the contact surface 52b when the gate portion 50 is in the advanced state is set as a contact position PC, and as illustrated in FIG. 7, the contact surface 52b retreats from the contact position PC, and the position of the contact surface 52b when the gate portion 50 is in the retreated state is set as a retreat position PE.

[0073] As illustrated in FIG. 6, the position of the contact surface 52b when the gate portion 50 is in the advanced state is set as a contact position PC, and as illustrated in FIG. 7, the contact surface 52b retreats from the contact position PC, and the position of the contact surface 52b when the gate portion 50 is in the retreated state is set as a retreat position PE. Figures 3 to 5 Figures 7 to 12 As illustrated in FIG. 6, the position of the contact surface 52b when the gate portion 50 is in the advanced state is set as a contact position PC, and as illustrated in FIG. 7, the contact surface 52b retreats from the contact position PC, and the position of the contact surface 52b when the gate portion 50 is in the retreated state is set as a retreat position PE.

[0074] ​​​Ribs 73 are arranged such that they extend from the upstream side of the drive roller 39 in the conveying direction to the downstream side of the drive roller 39 in the conveying direction. Multiple ribs 73 are arranged in the Y-axis direction to clamp the drive roller 39. For example... Figure 9 As shown, each rib 73 has a guide portion 74 protruding from its front end. This guide portion 74 guides the front end Pef of the conveyed medium P towards the driven roller 40. In other words, the guide portion 74 is located at a position corresponding to the rib 73. Furthermore, the guide portion 74 is located at the same position as the rib 73 in the Y-axis direction.

[0075] The guide portion 74 guides the leading edge Pef of the medium P to be conveyed toward the driven roller 40 by contacting the medium P. In this embodiment, the guide portion 74 is integrally formed with the rib 73. Therefore, multiple guide portions 74 are provided in the Y-axis direction in a manner that clamps the drive roller 39. Figure 9 As shown, when viewed from the direction along the Y-axis, the guide portion 74 protrudes radially from the circumferential surface 39d of the drive roller 39. The Y-axis direction is an example of the direction of the rotation axis 39a of the drive roller 39.

[0076] The surface of the guide portion 74, which contacts the medium P, is smoothly formed, with fewer irregularities compared to the circumferential surface 39d of the drive roller 39. Therefore, the surface roughness of the guide portion 74 is less than that of the circumferential surface 39d of the drive roller 39. Alternatively, the surface of the guide portion 74 may be formed to be the same as or smoother than the circumferential surface 40d of the driven roller 40; in this case, the irregularities of the guide portion 74 are the same as or less than those of the circumferential surface 40d of the driven roller 40.

[0077] The downstream end of the guide portion 74 in the conveying direction is located closer to the downstream side of the conveying direction than the contact surface 52b located at the contact position PC. Therefore, when the gate portion 50 is in the advancing state, viewed along the Y-axis, the contact surface 52b of the contact portion 52a of the gate portion 50 appears to partially overlap with the guide portion 74. In other words, when the gate portion 50 is in the advancing state, viewed along the Y-axis, the contact surface 52b of the contact portion 52a of the gate portion 50 appears to overlap with the guide portion 74. Therefore, when the gate portion 50 is in the advancing state, the guide portion 74 guides the leading edge Pef of the conveyed medium P to the contact surface 52b located at the contact position PC. The direction along the Y-axis is an example along the rotation axis 39a of the drive roller 39.

[0078] On the other hand, the end portion of the guide portion 74 on the downstream side in the conveyance direction is located at a position closer to the upstream side in the conveyance direction than the nip position PN. Therefore, in the curved path TO, there is no guide portion 74 between the end portion of the guide portion 74 on the downstream side in the conveyance direction and the nip position PN, but the direction in which the guide portion 74 guides the medium P is set to a direction in which the leading end Pef of the conveyed medium P faces the driven roller 40. Therefore, of the leading end Pef of the medium P conveyed toward the nip position PN, the leading end Pef of the medium P guided by the guide portion 74 is difficult to come into contact with the drive roller 39 even during the period from the end portion of the guide portion 74 on the downstream side in the conveyance direction to the arrival at the nip position PN.

[0079] Note that the guide portion 74 in the present embodiment has an upstream side guide portion 75 and a downstream side guide portion 76 continuous with the downstream side in the conveyance direction of the upstream side guide portion 75. The upstream side guide portion 75 and the downstream side guide portion 76 are inclined together with the opposed second guide portion 82 and the peripheral surface 40d of the driven roller 40 to form a conveyance path that tapers gradually from the upstream side to the downstream side in the conveyance direction when viewed in the direction along the Y-axis direction. This conveyance path constitutes a part of the curved path TO. The degree of inclination of the downstream side guide portion 76 in the present embodiment is set to be looser than the degree of inclination of the upstream side guide portion 75. As a result, the direction in which the downstream side guide portion 76 faces the driven roller 40 is closer to the nip position PN than the direction in which the upstream side guide portion 75 faces the driven roller 40.

[0080] Further, as shown in FIG. 6, after the skew correction operation, the gate portion 50 is switched from the advancing state to the retracted state by being rotated clockwise with the rotation axis 39a as the center, as indicated by the hollow arrow in FIG. 6. In this process, the leading end of the contact portion 52a in the gate portion 50 in the advancing state moves to a position away from the driven roller 40 while widening the gap between the peripheral surface 40d of the driven roller 40 from the position that appears to coincide with the peripheral surface 40d of the driven roller 40 when viewed in the direction along the Y-axis in the advancing state. Figures 10 to 12 Figure 11 Further, as shown in FIG. 6, after the skew correction operation, the gate portion 50 is switched from the advancing state to the retracted state by being rotated clockwise with the rotation axis 39a as the center, as indicated by the hollow arrow in FIG. 6. In this process, the leading end of the contact portion 52a in the gate portion 50 in the advancing state moves to a position away from the driven roller 40 while widening the gap between the peripheral surface 40d of the driven roller 40 from the position that appears to coincide with the peripheral surface 40d of the driven roller 40 when viewed in the direction along the Y-axis in the advancing state.

[0081] Further, after the skew correction operation, the contact surface 52b of the contact portion 52a reaches the nip position PN of the convey roller pair 38 from the contact position PC by being rotated clockwise with the rotation axis 39a as the center from the -Y direction side to the +Y direction side. During the period from the contact position PC to the nip position PN, the contact surface 52b of the contact portion 52a is in contact with the peripheral surface 40d of the driven roller 40, as shown in FIG. 6. Figure 11 ​As shown, the contact surface 52b of the contact portion 52a located at the contact position PC starts to move to the retreat position PE while increasing the degree of inclination from the driven roller 40 side in the contact surface 52b to the driving roller 39 side in the contact surface 52b in the downstream side in the conveyance direction from the view along the Y-axis direction.

[0082] Therefore, during the contact surface 52b of the contact portion 52a from the contact position PC reaches the pinch position PN of the conveyance roller pair 38 in the process of the gate portion 50 from the advance state to the retreat state, the leading end Pef of the medium P in contact with the contact surface 52b is easily moved to the driven roller 40 side in the contact surface 52b. Therefore, the leading end Pef of the medium P is difficult to contact with the driving roller 39 during the state from contact with the contact surface 52b to contact with the pinch position PN.

[0083] Next, the skew correction operation and the operation after the skew correction operation will be described with reference to Figures 9 to 14 Figure 13 Figure 14 is a plan view of the medium P in the state that the leading end Pef contacts with the contact surface 52b of the contact portion 52a in the gate portion 50. In Figure 13 Figure 14 In the above-described state, the medium P is conveyed upward.

[0084] As shown in Figure 9 , in the advance state of the gate portion 50 in which the contact surface 52b of the contact portion 52a is located at the contact position PC, the control portion 90 conveys the medium P conveyed from the upstream side in the conveyance direction to the curved path TO to the conveyance roller pair 38 by driving the driving roller 36 of the conveyance roller pair 35. Alternatively, in the advance state of the gate portion 50 in which the contact surface 52b of the contact portion 52a is located at the contact position PC, the control portion 90 conveys the medium P fed from the first medium cassette 3 to the conveyance roller pair 38 via the feed path T4 and the curved path TO by driving the control of the feed roller pair 25. Note that the medium P conveyed from the first medium cassette 3 to the curved path TO via the feed path T4 is guided to the conveyance roller pair 38 in the curved path TO by the rib 73, the guide portion 74 of the first guide portion 71. In other words, the medium P conveyed from the first medium cassette 3 to the conveyance roller pair 38 via the feed path T4 and the curved path TO is conveyed along the first guide portion 71 in the curved path TO.

[0085] Thus, as shown in Figure 10 Figure 13 , the leading end Pef of the medium P conveyed toward the conveyance roller pair 38 contacts with the contact surface 52b of the contact portion 52a. As shown in Figure 13 ​​​​As shown, in the state where the medium P is skewed, in the state where the leading end Pef reaches the gate portion 50, the medium P is not bulged between the outer path forming surface 65a and the inner path forming surface 67a, and the side edge Pe2 that is transported first due to the skew and the side edge Pe1 that is transported late due to the skew are located at substantially the same position between the outer path forming surface 65a and the inner path forming surface 67a.

[0086] In Figure 13 As shown in the state where the leading end Pef contacts the contact surface 52b of the contact portion 52a, the control portion 90 continues the driving of the driving roller 36 or the driving control of the feed roller pair 25, whereby the medium P is bulged in the curved path TO, and thus, as shown in Figure 14 As shown, the leading end Pef rotates in a manner of following the contact surface 52b of the contact portion 52a, and the skew is corrected.

[0087] After the skew correction operation, the control portion 90 drives the solenoid 58 to switch the gate portion 50 from the advanced state to the retreated state. In the process of switching the gate portion 50 from Figure 10 As shown in the advanced state, the control portion 90 drives the solenoid 58 to switch the gate portion 50 from Figure 11 As shown in the state, the control portion 90 drives the solenoid 58 to switch the gate portion 50 from Figure 12 As shown in the retreated state, when the contact surface 52b of the contact portion 52a moves from the pinch position PN of the transport roller pair 38 to the downstream side in the transport direction, the leading end Pef of the medium P contacts the pinch position PN. Note that the control portion 90 switches the gate portion 50 from the advanced state to the retreated state by driving the solenoid 58 when a predetermined time elapses after the medium detection portion 48 detects the medium P.

[0088] When the contact surface 52b of the contact portion 52a moves to Figure 12 As shown in the retreated position PE, when the gate portion 50 becomes the retreated state, the control portion 90 drives the driving roller 39 of the transport roller pair 38. Thereby, as shown in Figure 12 As shown, the medium P is transported to the downstream side in the transport direction, and the leading end Pef of the medium P passes through the pinch position PN to enter the transport path T1 at the time of recording.

[0089] As described above, according to the printer 1 related to Embodiment 1, the following effects can be obtained.

[0090] The printer 1 has a line head 46 that records on the medium P, a curved path T0 that conveys the medium P toward the line head 46, and a pair of conveying rollers 38 that has a drive roller 39 and a follower roller 40 provided to the curved path T0, sandwiches the medium P by the drive roller 39 and the follower roller 40, and conveys the medium P toward the line head 46. In addition, the printer 1 is provided with a gate portion 50 that has a contact surface 52b, and that is capable of being in a pushing state in which the contact surface 52b is located on the curved path T0 at a contact position PC that is more upstream in the conveying direction than a sandwich position PN at which the pair of conveying rollers 38 sandwiches the medium P, and that is in contact with a leading end Pef of the conveyed medium P, and a retreat state in which the contact surface 52b retreats from the contact position PC. In addition, the printer 1 is provided with a guide portion 74 that constitutes the curved path T0, guides the leading end Pef of the conveyed medium P to the contact surface 52b at the contact position PC, and that protrudes more in the radial direction of the drive roller 39 than the peripheral surface 39d of the drive roller 39, as viewed in the direction along the Y axis. Thus, when the peripheral surface 39d of the drive roller 39 and the peripheral surface 40d of the follower roller 40, which are located more upstream in the conveying direction than the contact position PC, are referred to as upstream peripheral surfaces, compared with the related art, it is possible to suppress a decrease in the accuracy of skew correction of the medium P due to the leading end Pef of the medium P coming into contact with the upstream peripheral surfaces before reaching the contact position PC. Thus, it is possible to suppress a decrease in the quality of an image formed on the medium P due to the skew correction operation of the medium P.

[0091] In the printer 1, the drive roller 39 is a toothed roller that has a plurality of teeth 39c capable of coming into point contact with the medium P, and that forms the peripheral surface 39d. Thus, the drive roller 39 is capable of appropriately serving as the first roller that constitutes the pair of conveying rollers 38.

[0092] The printer 1 has a line head 46 that records the medium P, a curved path T0 that conveys the medium P toward the line head 46, and a pair of conveying rollers 38 that has a driving roller 39 and a driven roller 40 provided in the curved path T0, sandwiches the medium P by the driving roller 39 and the driven roller 40, and conveys the medium P toward the line head 46. In addition, the printer 1 is provided with a gate portion 50 that has a contact surface 52b, and that is capable of being in a pushing state in which the contact surface 52b is in contact with the leading end Pef of the conveyed medium P at a contact position PC on the curved path T0 that is located more upstream in the conveying direction than a sandwich position PN at which the pair of conveying rollers 38 sandwiches the medium P, and a retreat state in which the contact surface 52b retreats from the contact position PC. In addition, in the curved path T0, the medium P on which a first face is recorded by the line head 46 is conveyed with the first face in contact with a peripheral surface 39d of the driving roller 39, the driving roller 39 has a plurality of teeth 39c that are capable of being in point contact with the medium P, and the plurality of teeth 39c form a peripheral surface 39d of the driving roller 39 that is centered on a rotation axis 39a of the driving roller 39. Thus, by making the driving roller 39 a toothed roller, it is possible to suppress the ink adhering to the medium P from being transferred to the driving roller 39, or the ink transferred to the driving roller 39 from being transferred to the driven roller 40. In addition, it is possible to suppress the ink transferred to either one of the driving roller 39 and the driven roller 40 from being transferred to the medium P, the subsequent medium P that is conveyed, and thus it is possible to suppress a decrease in the quality of the image formed on the medium P. Thus, it is possible to suppress a decrease in the quality of the image formed on the medium P due to the skew correction operation of the medium P.

[0093] The printer 1 is provided with a guide portion 74 that constitutes the curved path T0, guides the leading end Pef of the conveyed medium P to the contact surface 52b at the contact position PC, and protrudes more toward the radial direction of the driving roller 39 than the peripheral surface 39d of the driving roller 39 when viewed in the direction along the Y axis. Thus, when the peripheral surface 39d of the driving roller 39 and the peripheral surface 40d of the driven roller 40 that are located more upstream in the conveying direction than the contact position PC are the upstream-side peripheral surfaces, it is possible to suppress a decrease in the accuracy of the skew correction of the medium P due to the leading end Pef of the medium P coming into contact with the upstream-side peripheral surfaces before reaching the contact position PC, compared to the related art. Thus, it is possible to suppress a decrease in the quality of the image formed on the medium P due to the skew correction operation of the medium P.

[0094] In the printer 1, the peripheral surface 40d of the driven roller 40 is formed by an elastic member, and the direction in which the guide portion 74 guides the medium P is a direction in which the leading end Pef of the transported medium P is directed toward the driven roller 40. Thus, by guiding the medium P toward the driven roller 40, the medium P easily comes into contact with the driven roller 40 in the driven roller pair 38 before the medium P reaches the nip position PN, and it is possible to suppress the medium P from coming into contact with the drive roller 39.

[0095] In the printer 1, the contact surface 52b overlaps the guide portion 74 as viewed in the direction along the Y-axis direction when the gate portion 50 is in the advanced state. Thus, the contact surface 52b overlaps the guide portion 74 as viewed in the direction along the Y-axis direction when the gate portion 50 is in the advanced state, and it is possible to further suppress the leading end Pef of the medium P from coming into contact with the drive roller 39.

[0096] In the printer 1, the guide portion 74 is provided across (sandwiching) the contact surface 52b of the gate portion 50 in the Y-axis direction. Thus, the guide portion 74 is able to stably guide the medium P to the contact surface 52b of the contact portion 52a located at the nip position PC.

[0097] The printer 1 includes the rib 73 that constitutes the curved path TO and comes into contact with the transported medium P, and the guide portion 74 is provided at a position corresponding to the rib 73. Thus, the guide portion 74 is provided at a position corresponding to the rib 73, and it is possible to stably guide the leading end of the medium compared to a configuration in which the guide portion 74 is separately provided.

[0098] In the printer 1, the gate portion 50 is located at a position farther from the curved path TO than the rib 73 when the gate portion 50 is in the retracted state. Thus, the gate portion 50 does not come into contact with the medium P when the gate portion 50 is in the retracted state, and it is possible to suppress the load on the transport of the medium P.

[0099] In the printer 1, the contact surface 52b of the gate portion 50 is provided so as to be rotatable with respect to the rotation axis 39a of the drive roller 39. Thus, it is possible to appropriately adopt a configuration in which the gate portion 50 can be switched to the advanced state and the retracted state.

[0100] The printer 1 according to the above-described embodiment of the present disclosure can of course be modified or omitted in part of the configuration within a range not departing from the gist of the present disclosure. In addition, the above-described embodiment and other embodiments described below can be implemented in combination with each other within a range not contradicting the technology. Hereinafter, other embodiments will be described.

[0101] In the above-described embodiment, the moving member 52 of the gate portion 50 can also have a support portion 52s that is able to support the medium P when the gate portion 50 is in the retracted state. For example, as illustrated in FIG. 19, the support portion 52s can be provided on the moving member 52 of the gate portion 50. Figure 15 ,Figure 16 As shown, the support portion 52s of the moving member 52 is a flat surface that is continuously provided with the contact surface 52b of the contact portion 52a. In this case, the contact surface 52b and the support portion 52s can also be provided to form the same flat surface. In this case, as shown in FIG. 6, the contact surface 52b and the support portion 52s can also be provided to be located at the same position as the base surface 72 of the first guide portion 71 in the depth direction DF of the conveyance route T. In this case, as shown in FIG. 7, the contact surface 52b and the support portion 52s can also be provided to be located at the same position as the base surface 72 of the first guide portion 71 in the depth direction DF of the conveyance route T. Figure 16 As shown, the contact surface 52b and the support portion 52s can also be provided to be located at the same position as the base surface 72 of the first guide portion 71 in the depth direction DF of the conveyance route T when the gate portion 50 is in the retracted state. In this case, as shown in FIG. 6, the contact surface 52b and the support portion 52s can also be provided to be located at the same position as the base surface 72 of the first guide portion 71 in the depth direction DF of the conveyance route T. Figure 15 As shown, the contact surface 52b located at the contact position PC can also be inclined in a direction in which the driven roller 40 side in the contact surface 52b is closer to the conveyance direction downstream side than the driving roller 39 side in the contact surface 52b, as viewed in the direction along the Y-axis direction, when the gate portion 50 is in the advanced state.

[0102] In the above-described embodiment, the moving member 52 of the gate portion 50 can also have a guide portion 52g that guides the leading end Pef of the conveyed medium P to the contact surface 52b when the gate portion 50 is in the advanced state. The guide portion 52g has the same function as the guide portion 74 of the first guide portion 71 in Embodiment 1. In this case, the first guide portion 71 can also not have the guide portion 74. For example, as shown in FIG. 8, the guide portion 52g can also be the same shape as the guide portion 74 in the first embodiment, as viewed in the direction along the Y-axis direction, when the gate portion 50 is in the advanced state. In addition, the moving member 52 can also have a support portion 52s that can support the medium P. The support portion 52s is continuously provided with the guide portion 52g. In this case, as shown in FIG. 9, the support portion 52s can also support the medium P at the same position as the base surface 72 of the first guide portion 71 in the depth direction DF of the conveyance route T when the gate portion 50 is in the retracted state. Figure 17 As shown, the contact surface 52b and the support portion 52s can also be provided to be located at the same position as the base surface 72 of the first guide portion 71 in the depth direction DF of the conveyance route T when the gate portion 50 is in the retracted state. In this case, as shown in FIG. 6, the contact surface 52b and the support portion 52s can also be provided to be located at the same position as the base surface 72 of the first guide portion 71 in the depth direction DF of the conveyance route T. Figure 18 As shown, the contact surface 52b and the support portion 52s can also be provided to be located at the same position as the base surface 72 of the first guide portion 71 in the depth direction DF of the conveyance route T when the gate portion 50 is in the retracted state. In this case, as shown in FIG. 6, the contact surface 52b and the support portion 52s can also be provided to be located at the same position as the base surface 72 of the first guide portion 71 in the depth direction DF of the conveyance route T.

[0103] In the above-described embodiment, the guide portion 74 of the first guide portion 71 can also not be formed integrally with the rib 73. For example, the guide portion 74 can also be installed as another member on the rib 73 in the same position as the guide portion 74 in Embodiment 1. Alternatively, the guide portion 74 can also be installed as another member in the first guide portion 71 in a position different from the rib 73 in Embodiment 1 in the Y-axis direction. Further alternatively, the guide portion 74 can also be provided as another member so as to be movable with respect to the first guide portion 71. In this case, the guide portion 74 can also be moved so as to be in a guide position in which the guide portion 74 is located in the same position as the guide portion 74 in Embodiment 1 as viewed in the direction along the Y-axis when the gate portion 50 is in the advanced state, and in a retreat position in which the guide portion 74 does not protrude from the rib 73 when the gate portion 50 is in the retracted state. Further, in this case, a cam surface that supports a protrusion provided on the guide portion 74 can also be provided on the moving member 52, and the cam surface is displaced with the switching of the advanced state and the retracted state of the gate portion 50, thereby moving the guide portion 74 to the guide position and the retreat position.

[0104] In the above-described embodiment, the moving member 52 of the gate portion 50 can also not be provided so as to be rotatable with respect to the rotation axis 39a of the drive roller 39. For example, the moving member 52 can also be provided so as to be rotatable with respect to a rotation axis different from the rotation axis 39a of the drive roller 39. In the case where this rotation axis is set as a rotation axis RS (not shown), for example, the axis center of the rotation axis RS is along the Y-axis, and the axis center of the rotation axis 39a of the drive roller 39 is along the X-axis. Figure 10Likewise, when viewed in the direction along the Y-axis, in the depth direction DF of the conveyance route T, the contact portion 52a is disposed on the first guide portion 71 side with respect to the conveyance route T, and further away from the conveyance route T than the face of the inner side of the conveyance route T constituted by the ribs 73 of the first guide portion. Further, when viewed in the direction along the Y-axis, the axis center of the rotation shaft RS is disposed on the conveyance direction upstream side than the peripheral surface 39d of the drive roller 39 in the conveyance direction. In this case, the contact face 52b of the contact portion 52a disposed on the moving member 52 can also move to the contact position PC in Embodiment 1, and a separation position on the rotation axis 39a side of the drive roller 39 than the contact position PC in the depth direction DF of the conveyance route T. In the case where this separation position is set as the separation position PSA (not shown), the separation position PSA is on the conveyance direction upstream side of the pinch position PN. Further, when viewed in the direction along the Y-axis, in the process of the gate portion 50 switching from the advancing state to the retracted state, a gap through which the medium P can pass is formed between the leading end of the contact portion 52a and the driven roller 40. In the case where this gap is set as the gap GA (not shown), it can also be said that the contact portion 52a forms, together with the peripheral surface 40d of the driven roller 40, a conveyance passage that constitutes a part of the curved path TO when the gap GA is formed. When viewed in the direction along the Y-axis, this conveyance passage has a shape that gradually narrows from the conveyance direction upstream side to the downstream side. Further, since the contact portion 52a rotates around the axis center of the rotation shaft RS, during the period before the gap GA is formed, when viewed in the direction along the Y-axis, the contact face 52b of the contact portion 52a inclines toward the conveyance direction downstream side in the driven roller 40 side of the contact face 52b than the drive roller 39 side of the contact face 52b. Therefore, during the period before the gap GA is formed, the leading end Pef of the medium P in contact with the contact face 52b easily moves toward the driven roller 40 side of the contact face 52b. Therefore, the leading end Pef of the medium P that moves through the gap GA from the state of being in contact with the contact face 52b toward the pinch position PN is difficult to come into contact with the drive roller 39.

[0105] In the above-described embodiments, the moving member 52 of the gate portion 50 can also be disposed so as to be rotatable with respect to the rotation axis 39a of the drive roller 39. For example, the moving member 52 can also be disposed to the first guide portion 71 in a manner so as to be slidable in the direction along the depth direction DF of the conveyance route T. In this case, the contact face 52b of the contact portion 52a disposed on the moving member 52 can also move to the contact position PC in Embodiment 1, and a separation position that does not come into contact with the conveyed medium P. In the case where this separation position is set as the separation position PSB (not shown), when the gate portion 50 is in the retracted state, the contact face 52b of the contact portion 52a is disposed on the conveyance direction upstream side than the pinch position PN. Figure 10Likewise, when viewed in the direction along the Y-axis, the separation position PSB is located at a position closer to the rotation axis 39a side of the drive roller 39 than the contact position PC in the depth direction DF of the conveyance route T. In addition, the contact surface 52b located at the separation position PSB is along the depth direction DF of the conveyance route T. In addition, in this case, the separation position PSB is located at the same position as the contact position PC in the conveyance direction, and is located at a position closer to the conveyance direction upstream side than the nip position PN. In addition, in this case, during the process in which the gate portion 50 is switched from the advance state to the retreat state, a gap GB (not shown) through which the medium P can pass is formed between the leading end of the contact portion 52a and the peripheral surface 40d of the driven roller 40. In addition, the leading end Pef of the medium P that moves from the state of contact with the contact surface 52b through the gap GB to the nip position PN is difficult to contact with the drive roller 39.

[0106] In the above-described embodiments, the printer 1 can also not be provided with the switching portion 57 and the solenoid 58 that switch the gate portion 50 to the advance state and the retreat state. For example, in Embodiment 1, the pressing force of the spring that acts on the link member 53 can also be changed so that the gate portion 50 becomes the advance state. In this case, in Embodiment 1, the control portion 90 can also be configured to start the drive of the drive roller 39 before the gate portion 50 becomes the retreat state. Figure 10 In Embodiment 2, the pressing force of the spring that acts on the link member 53 can also be set so that, when the leading end Pef of the conveyed medium P contacts with the contact surface 52b located at the contact position PC and the pressing force that presses the contact surface 52b becomes a predetermined size, the medium P can pass through the gap GC (not shown) formed between the contact portion 52a and the driven roller 40 by the clockwise rotation of the moving member 52.

[0107] In the above-described embodiments, the control portion 90 can also perform the drive of the drive roller 39 before the gate portion 50 becomes the retreat state. For example, the control portion 90 can also start the drive of the drive roller 39 simultaneously with the drive of the solenoid 58 for switching the gate portion 50 from the advance state to the retreat state. In addition, for example, the control portion 90 can also start the drive of the drive roller 39 during the period in which the moving member 52 moves during the process in which the gate portion 50 is switched from the advance state to the retreat state. In this case, the control portion 90 can also start the drive of the drive roller 39 after the contact surface 52b of the contact portion 52a passes the nip position PN.

[0108] In the above-described embodiments, a heater that dries the ink adhering to the first face of the medium P before the medium P on which the first face is recorded by the line head 46 reaches the conveyance roller pair 38 can also be provided on the conveyance route T. In this case, the heater can be provided on the turning path T2 or the reversing path T3, for example. Alternatively, the ink adhering to the first face of the medium P can also be dried before the medium P reaches the conveyance roller pair 38 by holding the medium P on which the first face is recorded on the turning path T2 or the reversing path T3 for a prescribed time. Further, in a case where the possibility of the ink adhering to the medium P being transferred to the drive roller 39 constituting the conveyance roller pair 38 is low, the drive roller 39 can also not be a toothed roller. In this case, the drive roller 39 can also be a metal roller that is processed in a manner such that a part of the peripheral face 39d becomes a rough face, a so-called non-slip roller. Further, in this case, the drive roller 39 can also be a ceramic roller in which a plurality of ceramic particles are provided on the peripheral face 39d.

Claims

1. A recording apparatus characterized by comprising: Possessing: a recording section that performs recording on a medium; a conveyance path that conveys the medium to the recording section; a pair of conveyance rollers that has a first roller and a second roller provided on the conveyance path, conveys the medium to the recording section by sandwiching the medium with the first roller and the second roller; a gate section that has a moving member that is formed with a contact portion provided with a contact surface, and that can be in a thrust state and a retreat state, the thrust state being a state in which the contact surface is in a contact position on the conveyance path that is closer to an upstream of a conveyance direction than a sandwiching position at which the pair of conveyance rollers sandwiches the medium, and in contact with a leading end of the medium being conveyed, and the retreat state being a state in which the contact surface retreats from the contact position; and a guide section that constitutes the conveyance path and guides the leading end of the medium being conveyed to the contact surface at the contact position, the guide section protruding more toward a radial direction of the first roller than an outer circumference of the first roller as viewed in a direction along an axis of rotation of the first roller, the moving member is provided with a plurality of moving members at a prescribed interval in a width direction of the medium, the plurality of moving members are mounted on a link member that can rotate coaxially with the axis of rotation of the first roller, and all of the moving members rotate simultaneously by rotation of the link member, the recording device possesses a rib that constitutes the conveyance path and is in contact with the medium being conveyed, the gate section is located at a position farther from the conveyance path than the rib when the gate section is in the retreat state.

2. The recording device according to claim 1, characterized in that the first roller is a toothed roller that has a plurality of teeth that can be in point contact with the medium.

3. A recording device, characterized in that the recording device possesses: a recording section that performs recording on a medium; a conveyance path that conveys the medium to the recording section; a pair of conveyance rollers that has a first roller and a second roller provided on the conveyance path, conveys the medium to the recording section by sandwiching the medium with the first roller and the second roller; and a gate section that has a moving member that is formed with a contact portion provided with a contact surface, and that can be in a thrust state and a retreat state, the thrust state being a state in which the contact surface is in a contact position on the conveyance path that is closer to an upstream of a conveyance direction than a sandwiching position at which the pair of conveyance rollers sandwiches the medium, and in contact with a leading end of the medium being conveyed, and the retreat state being a state in which the contact surface retreats from the contact position, the medium is conveyed in an orientation in which a first face that is recorded by the recording section is in contact with the first roller, the first roller is a toothed roller that has a plurality of teeth that can be in point contact with the medium, The moving members are provided at a predetermined interval in a width direction of the medium, and the moving members are mounted on a link member that can rotate coaxially with the rotation axis of the first roller, and all of the moving members rotate simultaneously by rotation of the link member, The recording device is provided with a rib that constitutes the conveyance path and contacts the medium being conveyed, The gate portion is located farther from the conveyance path than the rib when the gate portion is in the retracted state.

4. The recording device according to claim 3, wherein The recording device is provided with a guide portion that constitutes the conveyance path and guides the leading end of the medium being conveyed to the contact surface located at the contact position, and the guide portion protrudes farther in the radial direction of the first roller than the outer periphery of the first roller as viewed in the direction along the rotation axis of the first roller.

5. The recording device according to claim 1 or 3, wherein The outer peripheral surface of the second roller is formed by an elastic member, The direction in which the guide portion guides the medium is a direction in which the leading end of the medium being conveyed is directed toward the second roller.

6. The recording device according to claim 1 or 3, wherein The contact surface overlaps the guide portion as viewed in the direction along the rotation axis of the first roller when the gate portion is in the advanced state.

7. The recording device according to claim 1 or 3, wherein The guide portion is provided across the contact surface of the gate portion in the direction of the rotation axis of the first roller.

8. The recording device according to claim 1 or 3, wherein The guide portion is provided at a position corresponding to the rib.

9. The recording device according to claim 1 or 3, wherein The contact surface of the gate portion is provided so as to be rotatable with respect to the rotation axis of the first roller.

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