Recording device and conveying device

Abstract

To solve the problem in which: when a tension bar oscillates, the posture of recording paper between a roll paper taken up by a take-up device and the tension bar varies, and tension acting on the recording paper sometimes varies largely.SOLUTION: A recording device which can perform recording in a medium comprises: a recording part that can perform recording in the medium; a conveying part that can convey the medium; a take-up part that rotates with a rotation axis as the center and can take up the medium conveyed by the conveying part; a first bar member on which a first surface of the medium can be wound; a second bar member that is arranged between the first bar member and the take-up part, and on which a second surface of the medium can be wound; and an arm member that can oscillate with an oscillation axis matching the rotation axis as the center. The arm member supports the first bar member and the second bar member.SELECTED DRAWING: Figure 1

Description

Technical Field

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

Background Art

[0002] Printers that wind up the printed recording medium around a take-up shaft are known. The printer of Patent Document 1 includes a platen on which recording paper is placed during printing, a recording head that discharges ink, and a take-up device that winds up the recording paper in a roll shape. The printer also includes a tension bar. The tension bar is supported by a support arm. The support arm swings about a support shaft and swings about a support shaft that coincides with the take-up shaft of the take-up device.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, when the tension bar swings, the posture of the recording paper between the roll paper wound up by the take-up device and the tension bar may change, and the fluctuation of the tension applied to the recording paper may increase.

Means for Solving the Problems

[0005] The recording device of the present disclosure includes a recording unit capable of recording on a medium, a conveyance unit capable of conveying the medium, a winding unit that rotates about a rotation axis and is capable of winding the medium conveyed by the conveyance unit, a first bar member capable of winding around the first surface of the medium, a second bar member disposed between the first bar member and the winding unit and capable of winding around the second surface of the medium, and an arm member capable of swinging about a swing axis that coincides with the rotation axis, and the arm member supports the first bar member and the second bar member.

[0006] The conveyance device of the present disclosure is a conveyance device capable of conveying a medium, and includes a conveyance unit capable of conveying the medium, a winding unit that rotates about a rotation axis and is capable of winding the medium conveyed by the conveyance unit, a first bar member capable of winding around the first surface of the medium, a second bar member disposed between the first bar member and the winding unit and capable of winding around the second surface of the medium, and an arm member that supports the first bar member and the second bar member and is capable of swinging about a swing axis that coincides with the rotation axis, and the arm member supports the first bar member and the second bar member.

Brief Description of the Drawings

[0007]

Figure 1

Figure 2A

Figure 2B

Figure 2C

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Mode for Carrying Out the Invention

[0008] FIG. 1 is a schematic cross-sectional view showing the configuration of the printer 10. The printer 10 is an inkjet printer that ejects ink onto a medium M for printing. The printer 10 includes a printing unit 20, a supply unit 30 that feeds the medium M, and a medium winding unit 40. The printer 10 corresponds to an example of a recording device. The medium M corresponds to an example of a medium.

[0009] Some of the figures including FIG. 1 show the XYZ coordinate system. The X-axis, Y-axis, and Z-axis are perpendicular to each other. The X-axis is parallel to the installation surface of the printer 10 and corresponds to the width of the printer 10. The Y-axis is parallel to the installation surface of the printer 10 and corresponds to the depth of the printer 10. The Z-axis is perpendicular to the installation surface of the printer 10 and corresponds to the height of the printer 10.

[0010] Hereinafter, the +X direction parallel to the X-axis indicates the direction from the supply unit 30 toward the medium winding unit 40, and the direction from the center of FIG. 1 to the left. The -X direction of the X-axis indicates the direction from the center of FIG. 1 to the right. The +Y direction parallel to the Y-axis indicates the direction toward the front of FIG. 1. The -Y direction parallel to the Y-axis indicates the direction toward the back of FIG. 1. The +Z direction parallel to the Z-axis indicates the direction from the center of FIG. 1 upward. The -Z direction parallel to the Z-axis indicates the direction from the center of FIG. 1 downward.

[0011] The printing unit 20 includes a supply guide frame 21, a pair of conveying rollers 24 having a first conveying roller 22 and a second conveying roller 23, a platen 25, a print head 26, a discharge guide frame 27, and a control unit 50.

[0012] The supply guide frame 21 guides the medium M sent out from the supply unit 30 to the pair of conveying rollers 24. The supply guide frame 21 guides the medium M in the +X direction and the +Z direction. The supply guide frame 21 may be composed of one member or a plurality of members.

[0013] The pair of conveying rollers 24 has a first conveying roller 22 and a second conveying roller 23, and can convey the medium M. The pair of conveying rollers 24 corresponds to an example of a conveying unit. The first conveying roller 22 is arranged at a position in the +Z direction with respect to the medium M. The second conveying roller 23 is arranged at a position in the -Z direction with respect to the medium M. The first conveying roller 22 or the second conveying roller 23 is rotationally driven by a driving force from a driving source such as a motor (not shown). The first conveying roller 22 and the second conveying roller 23 sandwich the medium M by being pressed against each other, and convey the medium M to the print head 26 by the driving force from the driving source.

[0014] The platen 25 is provided at a position in the -Z direction with respect to the print head 26. The platen 25 is a flat member that supports the medium M conveyed by the pair of conveying rollers 24. When a suction fan is provided at a position in the -Z direction with respect to the platen 25, the platen 25 is provided with through holes for allowing the flow of air. Due to the airflow of the suction fan, the medium M is pressed against the platen 25.

[0015] The print head 26 can perform printing by discharging ink onto the medium M supported by the platen 25. The print head 26 forms an image on the medium M by discharging ink. The print head 26 corresponds to an example of a recording unit. The print head 26 is supported by a carriage (not shown) and may be moved in the +Y direction and the -Y direction.

[0016] The discharge guide frame 27 guides the medium M printed by the print head 26 to the medium take-up unit 40. The discharge guide frame 27 guides the medium M in an oblique direction intersecting the +X direction and the -Z direction. The discharge guide frame 27 may be composed of one member or a plurality of members.

[0017] A drying unit (not shown) may be provided at a position facing the discharge guide frame 27. The drying unit includes, for example, a heater as a heat source. The drying unit heats the medium M on the discharge guide frame 27 and promotes the fixing of the ejected ink to the medium M.

[0018] The control unit 50 is a controller that performs various controls such as conveyance control of the medium M and printing control on the medium M. The controller includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and a storage (not shown). The control unit 50 acquires detection results from various sensors (not shown) and performs various controls. The control unit 50 may acquire print data and perform various controls based on the acquired print data. The control unit 50 may be composed of one or a plurality of units.

[0019] The supply unit 30 includes a medium roll support shaft 31, a supply guide member 32, a supply bar member 33, and a supply bar support member 34. A medium roll 60 in which the medium M is wound in a roll shape is supplied to the supply unit 30.

[0020] The medium roll support shaft 31 supports the medium roll 60. The medium roll support shaft 31 is rotatably supported by a frame (not shown) disposed at the +Y direction end and the -Y direction end of the supply unit 30. The medium roll support shaft 31 may be rotated by the driving force of a driving source such as a motor (not shown). When the medium roll support shaft 31 is rotated by the driving force of the driving source, the rotation amount is controlled by the control of the control unit 50.

[0021] The supply guide member 32 guides the medium M fed out from the medium roll 60. The supply guide member 32 guides the medium M in an oblique direction intersecting the +X direction and the -Z direction. The supply guide member 32 is, as an example, a roll member. The roll member may be rotatably supported or non-rotatably supported. In order to increase the slidability of the medium M, it is desirable that the roll member be rotatably supported.

[0022] The supply bar member 33 is supported by the supply bar support member 34. The supply bar member 33 winds the medium M guided by the supply guide member 32 and applies tension to the medium M. The supply bar member 33 guides the medium M to the conveying roller pair 24 via the supply guide frame 21. The supply bar member 33 guides the medium M in the substantially +Z direction.

[0023] The supply bar support member 34 is arranged at a position in the +Y direction and a position in the -Y direction with respect to the supply bar member 33 so as to sandwich the supply bar member 33. The supply bar support member 34 supports the supply bar member 33 so as to be swingable. The supply bar support member 34 swings the supply bar member 33 about an imaginary supply bar swing axis (not shown). In the case of FIG. 1, the supply bar swing axis coincides with the rotation axis (not shown) of the medium roll support axis 31. The supply bar swing axis does not have to coincide with the rotation axis. The supply bar support member 34 applies tension to the medium M by swinging the supply bar member 33. The supply bar support member 34 adjusts the tension acting on the portion of the medium M from the medium roll 60 to the conveying roller pair 24 by applying tension to the medium M.

[0024] The medium winding unit 40 includes a medium winding member 41, a first tension bar 43, a second tension bar 44, and a tension bar support member 46. The medium winding unit 40 winds the medium M printed by the printing unit 20.

[0025] FIG. 1 shows a take-up member rotation axis 42 that is the rotation center of the media take-up member 41, and a tension bar swing axis 49 that is the swing center of the tension bar support member 46. The take-up member rotation axis 42 and the tension bar swing axis 49 are virtual axes that are parallel or substantially parallel to the Y-axis. The take-up member rotation axis 42 and the tension bar swing axis 49 may be offset within the range of design error. The take-up member rotation axis 42 corresponds to an example of a rotation axis. The tension bar swing axis 49 corresponds to an example of a swing axis.

[0026] The media take-up member 41 is capable of taking up the printed media M. The media take-up member 41 is provided downstream of the conveyance roller pair 24 in the conveyance direction of the media M. The media take-up member 41 is rotatable about the take-up member rotation axis 42. The media take-up member 41 supports a printed media roll 70 that has taken up the media M printed by the printing unit 20. The printed media roll 70 in FIG. 1 shows a virtual state when the media M is taken up. The media take-up member 41 is rotatably supported by a frame (not shown) disposed at the +Y direction end and the -Y direction end of the media take-up unit 40. The media take-up member 41 rotates by a driving force from a driving source such as a motor (not shown) and takes up the media M. The media take-up member 41 corresponds to an example of a take-up part.

[0027] The printing surface of the medium M printed by the print head 26 is wound around the first tension bar 43. The printing surface corresponds to an example of the first surface. The first tension bar 43 contacts the printing surface directly or via a cover member 161 described later. That is, the first tension bar 43 can contact the printing surface directly or indirectly. Also, the printing surface of the medium M is wound around the first tension bar 43 directly or indirectly. The first tension bar 43 presses the printing surface of the medium M by its own weight. The first tension bar 43 may press the printing surface of the medium M using the rotation of the medium take-up member 41 as a driving force. The first tension bar 43 may press the printing surface of the medium M by the swing of the tension bar support member 46. The shape of the first tension bar 43 is not limited as long as it can press the printing surface of the medium M, but it is preferably a cylinder or a column extending in the direction along the X axis. The first tension bar 43 uses an extrusion molding member of a metal material such as aluminum or SUS, or a pipe processing member of a metal material such as aluminum or SUS. The first tension bar 43 corresponds to an example of the first bar member.

[0028] The back surface, which is the surface on the opposite side of the printing surface of the medium M, is wound around the second tension bar 44. The back surface corresponds to an example of the second surface. The second tension bar 44 contacts the back surface directly or via the cover member 161. That is, the second tension bar 44 can contact the back surface directly or indirectly. Also, the back surface of the medium M is wound around the second tension bar 44 directly or indirectly. The shape of the second tension bar 44 is not limited as long as it can wind the back surface of the medium M, but it is preferably a cylinder or a column extending in the direction along the X axis. The second tension bar 44 uses an extrusion molding member of a metal material such as aluminum or SUS, or a pipe processing member of a metal material such as aluminum or SUS. The second tension bar 44 corresponds to an example of the second bar member.

[0029] The tension bar support member 46 is supported by a frame or the like disposed at the +Y direction position and the -Y direction position of the medium winding unit 40. The tension bar support member 46 supports the first tension bar 43 and the second tension bar 44. The tension bar support member 46 is swingable about the tension bar swing axis 49. The tension bar support member 46 supports the first tension bar 43 and the second tension bar 44 such that the second tension bar 44 is positioned between the tension bar swing axis 49 and the first tension bar 43. The cross-sectional shape of the tension bar support member 46 in FIG. 1 is a rectangle long in the axis parallel to the X-axis when viewed from the +Y direction, but is not limited thereto. The cross-sectional shape of the tension bar support member 46 in FIG. 1 may be a shape having a portion extending in the +Z direction or the -Z direction from the tension bar swing axis 49 and a portion extending in the -X direction from the end of the first portion in the +Z direction or the -Z direction when viewed from the +Y direction. That is, the cross-sectional shape of the tension bar support member 46 in FIG. 1 may be a shape having a first portion extending in a first direction from the tension bar swing axis 49 and a second portion extending in a second direction different from the first direction from the first portion in the first direction when viewed from the +Y direction. The tension bar support member 46 corresponds to an example of an arm member. The first tension bar 43, the second tension bar 44, and the tension bar support member 46 correspond to an example of a tension applying portion that applies tension to the medium M. The tension bar support member 46 may be composed of two units supported by respective frames disposed at the +Y direction position and the -Y direction position of the medium winding unit 40.

[0030] A sensor (not shown) for detecting the swing position is provided for the tension bar support member 46. The tension bar support member 46 swings in the -Z direction due to the self-weights of the first tension bar 43 and the second tension bar 44, and applies tension to the medium M. When the tension bar support member 46 swings to a predetermined lower limit position in the -Z direction, the control unit 50 controls the drive source for rotating the medium winding member 41 to wind the medium M around the medium winding member 41. When the medium M is wound around the medium winding member 41, the tension bar support member 46 swings in the +Z direction. When the tension bar support member 46 swings to a predetermined upper limit position in the +Z direction, the control unit 50 controls the drive source for rotating the medium winding member 41 to stop the winding of the medium M around the medium winding member 41. The control unit 50 adjusts the degree of tension applied to the medium M by the driving operation of the tension bar support member 46.

[0031] The printer 10 conveys the medium M fed out from the medium roll 60 supplied to the supply unit 30 along the following path. The medium M fed out from the medium roll 60 is conveyed to the printing unit 20 via the supply guide member 32 and the supply bar member 33. The printing unit 20 conveys the medium M to the medium winding unit 40 using the supply guide frame 21, the conveyance roller pair 24, the platen 25, and the discharge guide frame 27. The medium winding unit 40 winds the medium M passing through the first tension bar 43 and the second tension bar 44 around the printing medium roll 70 supported by the medium winding member 41. The conveyance roller pair 24, the first tension bar 43, the second tension bar 44, the tension bar support member 46, and the medium winding member 41 correspond to an example of a conveyance device.

[0032] Figures 2A, 2B, and 2C show the operation of the tension bar support member 46. Figure 2A shows the case where the tension bar support member 46 is located at the swing center. The swing center is a position where the longitudinal direction of the tension bar support member 46 substantially coincides with the direction in which the following horizontal line HL extends, and is a reference when the tension bar support member 46 swings in the +Z direction or -Z direction from the central position. Figure 2B shows the case where the tension bar support member 46 swings in the +Z direction about the tension bar swing axis 49. Figure 2C shows the case where the tension bar support member 46 swings in the -Z direction about the tension bar swing axis 49. The tension bar support member 46 is shown in a rod shape for ease of understanding the operation.

[0033] Figures 2A, 2B, and 2C show the winding start position M1, the separation position M2, the horizontal line HL, and the medium movement line ML. The winding start position M1 is the position where the medium M conveyed from the second tension bar 44 is wound around the printing medium roll 70. The separation position M2 is the position where the medium M wound around the second tension bar 44 separates from the second tension bar 44 as it moves. The horizontal line HL is an imaginary line perpendicular to the tension bar swing axis 49 and parallel to the X axis. The medium movement line ML is an imaginary line connecting the winding start position M1 and the separation position M2.

[0034] Figures 2B and 2C show the swing angle α. The swing angle α is the angle between the horizontal line HL and the tension bar support member 46. The swing angle α indicates the angle when the tension bar support member 46 swings. The swing angle α is set to 0° when the tension bar support member 46 is in the horizontal position coinciding with the horizontal line HL. Figures 2A, 2B, and 2C use the position where the swing angle α is 0° as the swing center of the tension bar support member 46. The swing center of the tension bar support member 46 is not limited to the horizontal position of the tension bar support member 46. The swing angle +α in Figure 2B is given a + sign with the swing of the tension bar support member 46 in the +Z direction as the positive direction. The swing angle -α in Figure 2C is given a - sign with the swing of the tension bar support member 46 in the -Z direction as the negative direction.

[0035] In FIGS. 2A, 2B, and 2C, a winding angle θ is shown. The winding angle θ is the angle between the tension bar support member 46 and the media movement line ML. The winding angle θ shown in FIG. 2A 0 represents the angle between the tension bar support member 46 and the media movement line ML when the tension bar support member 46 is in the horizontal position. The winding angle θ shown in FIG. 2B +α represents the angle between the tension bar support member 46 and the media movement line ML when the tension bar support member 46 is in the position of the swing angle +α. The winding angle θ shown in FIG. 2C -α represents the angle between the tension bar support member 46 and the media movement line ML when the tension bar support member 46 is in the position of the swing angle -α.

[0036] As is apparent from FIGS. 2A, 2B, and 2C, when the tension bar support member 46 swings, the first tension bar 43 and the second tension bar 44 move along circular orbits centered on the tension bar swing axis 49. Since the winding member rotation axis 42 and the tension bar swing axis 49 coincide, the first tension bar 43 and the second tension bar 44 move along circular orbits concentric with the printing medium roll 70. The distance between the second tension bar 44 and the outer periphery of the printing medium roll 70 is constant or substantially constant. As the second tension bar 44 moves along a circular orbit concentric with the printing medium roll 70, the variation in the winding angle θ due to the swing of the tension bar support member 46 becomes small. That is, θ≒θ +α ≒θ -α ≒θ 0 holds. Further, when the media M is wound around the first tension bar 43 and the second tension bar 44, the variation in the amount of media M wound around the first tension bar 43 and the second tension bar 44 due to the swing of the tension bar support member 46 becomes small.

[0037] As described above, the printer 10 capable of recording on the medium M includes a print head 26 capable of recording on the medium M, a pair of conveyance rollers 24 capable of conveying the medium M, a medium winding member 41 that rotates around the winding member rotation shaft 42 and can wind up the medium M conveyed by the pair of conveyance rollers 24, a first tension bar 43 around which the printing surface of the medium M can be wound, a second tension bar 44 disposed between the first tension bar 43 and the medium winding member 41 and around which the back surface of the medium M can be wound, and a tension bar support member 46 that can swing around a tension bar swing shaft 49 that coincides with the winding member rotation shaft 42. The tension bar support member 46 supports the first tension bar 43 and the second tension bar 44. By providing the second tension bar 44 on the tension bar support member 46 that can swing coaxially with the winding member rotation shaft 42 of the medium winding member 41, fluctuations in the medium posture between the first tension bar 43 and the print medium roll 70 and fluctuations in the amount of winding of the medium around the first tension bar 43 and the second tension bar 44 are reduced, and fluctuations in the tension applied to the medium M due to winding of the medium M are suppressed.

[0038] The conveying device includes a pair of conveyance rollers 24 capable of conveying the medium M, a medium winding member 41 that rotates around the winding member rotation shaft 42 and can wind up the medium M conveyed by the pair of conveyance rollers 24, a first tension bar 43 around which the printing surface of the medium M can be wound, a second tension bar 44 disposed between the first tension bar 43 and the medium winding member 41 and around which the back surface of the medium M can be wound, and a tension bar support member 46 that supports the first tension bar 43 and the second tension bar 44 and can swing around a tension bar swing shaft 49 that coincides with the winding member rotation shaft 42. The tension bar support member 46 supports the first tension bar 43 and the second tension bar 44. By providing the second tension bar 44 on the tension bar support member 46 that can swing coaxially with the winding member rotation shaft 42 of the medium winding member 41, fluctuations in the medium posture and the amount of winding between the first tension bar 43 and the print medium roll 70 are reduced, and fluctuations in the tension applied to the medium M due to winding of the medium M are suppressed.

[0039] Figures 3 and 4 show an example of the partial structure of the tension bar support member 46. The tension bar support member 46 in Fig. 3 shows one of the two tension bar support members 46 arranged in the +Y direction and -Y direction of the medium winding unit 40. The two tension bar support members 46 may have the same configuration. One of the two tension bar support members 46 may not have any of the frame fixing member 144, the first rotation adjustment member 154, and the second rotation adjustment member 158 described later.

[0040] Fig. 3 shows the partial structure of the tension bar support member 46 in a state where the first support frame 142 and the second support frame 143 are in contact. The tension bar support member 46 in Fig. 3 includes a guide member 141, a first support frame 142, a second support frame 143, and a frame fixing member 144.

[0041] The guide member 141 movably supports the first support frame 142. The guide member 141 guides the movement of the first support frame 142 in a direction approaching the second support frame 143 or in a direction away from the second support frame 143. Fig. 3 shows a state where the first support frame 142 and the second support frame 143 are in contact.

[0042] The first support frame 142 supports the first tension bar 43. The first support frame 142 is movable along the guide member 141 while supporting the first tension bar 43. The first tension bar 43 has a first tension bar shaft 151. The first support frame 142 supports the first tension bar shaft 151 via a first bearing 152. The first bearing 152 rotatably supports the first tension bar 43. The first support frame 142 has a first frame hole 153.

[0043] The second support frame 143 supports the second tension bar 44. The second tension bar 44 has a second tension bar shaft 155. The second support frame 143 supports the second tension bar shaft 155 via a second bearing 156. The second bearing 156 rotatably supports the second tension bar 44. The second support frame 143 has a second frame hole 157.

[0044] The frame fixing member 144 fixes the position of the first support frame 142. The user of the printer 10 moves the first support frame 142 along the guide member 141 and moves the first support frame 142 to a desired position. After the user moves the first support frame 142 to the desired position, the user fixes the first support frame 142 at the desired position using the frame fixing member 144. An example of the frame fixing member 144 is a screw. The user fixes the first support frame 142 to the guide member 141 by tightening the screw. The user can make the first support frame 142 movable by loosening the screw. FIG. 3 shows a state in which the first support frame 142 is fixed by the frame fixing member 144 in a state where the first support frame 142 is in contact with the second support frame 143. In the state of FIG. 3, the distance between the first tension bar 43 and the second tension bar 44 is minimized.

[0045] FIG. 4 shows a partial structure of the tension bar support member 46 in a state where the first support frame 142 and the second support frame 143 are separated. The tension bar support member 46 in FIG. 4 shows a state where the first support frame 142 has slid in the separation direction L. When the first support frame 142 is separated from the second support frame 143, the distance between the first tension bar 43 and the second tension bar 44 increases. By increasing the distance between the first tension bar 43 and the second tension bar 44, for example, when installing a medium, it becomes easier for the user to insert the medium M between the first tension bar 43 and the second tension bar 44. The user can adjust the distance between the first tension bar 43 and the second tension bar 44 by changing the position of the first support frame 142. The guide member 141 and the first support frame 142 correspond to an example of the distance adjustment mechanism.

[0046] As shown in FIGS. 3 and 4, the tension bar support member 46 has a distance adjustment mechanism for changing the distance between the first tension bar 43 and the second tension bar 44. When the user performs an operation of winding the medium M around the first tension bar 43 and the second tension bar 44, the operation becomes easier.

[0047] FIG. 5 shows the support structure of the first tension bar 43 and the second tension bar 44 by the tension bar support member 46. FIG. 5 shows an example of a tension applying portion. FIG. 5 is a schematic view of the tension applying portion as viewed from the +Z direction. Two tension bar support members 46 support the first tension bar 43 and the second tension bar 44. The first tension bar 43 is rotatably supported by the first bearing 152 shown in FIG. 3. The first tension bar 43 rotates when transporting the medium M. The second tension bar 44 is rotatably supported by the second bearing 156 shown in FIG. 3. The second tension bar 44 rotates when transporting the medium M. The two first support frames 142 shown in FIG. 5 each include two frame fixing members 144, but are not limited thereto. The number of frame fixing members 144 may be one, or three or more.

[0048] FIG. 6 shows the cross-sectional structure of the first tension bar 43 and the second tension bar 44 by the tension bar support member 46. The tension bar support member 46 in FIG. 6 includes a first rotation adjustment member 154 and a second rotation adjustment member 158. The tension bar support member 46 in FIG. 6 shows a state where the first support frame 142 and the second support frame 143 are separated, but is not limited thereto.

[0049] The first rotation adjustment member 154 makes the first tension bar 43 non-rotatable. The first rotation adjustment member 154 is inserted into a first screw hole provided in the first tension bar 43 (not shown) through a first frame hole 153 provided in the first support frame 142 shown in FIG. 3 and a through hole provided in a guide member 141 (not shown). When the first rotation adjustment member 154 is inserted into the first screw hole, the first tension bar 43 is made non-rotatable. The first rotation adjustment member 154 makes the first tension bar 43 non-rotatable when transporting the medium M. When the user removes the first rotation adjustment member 154 from the first screw hole, the first tension bar 43 becomes rotatable. An example of the first rotation adjustment member 154 is a screw. The first rotation adjustment member 154 and the first screw hole correspond to an example of a first adjustment mechanism.

[0050] The second rotation adjustment member 158 makes the second tension bar 44 non-rotatable. The second rotation adjustment member 158 is inserted into a second screw hole provided in a second tension bar 44 (not shown) through a second frame hole 157 provided in the second support frame 143 shown in FIG. 3 and a through hole provided in a guide member 141 (not shown). When the second rotation adjustment member 158 is inserted into the second screw hole, the second tension bar 44 is made non-rotatable. The second rotation adjustment member 158 makes the second tension bar 44 non-rotatable when the medium M is conveyed. When the user removes the second rotation adjustment member 158 from the second screw hole, the second tension bar 44 becomes rotatable. An example of the second rotation adjustment member 158 is a screw. The second rotation adjustment member 158 and the second screw hole correspond to an example of the second adjustment mechanism.

[0051] The first rotation adjustment member 154 and the second rotation adjustment member 158 are respectively attached to the tension bar support member 46 and are removable. By making the first tension bar 43 and the second tension bar 44 rotatable, the user can reduce the tension applied to the medium M. By making the first tension bar 43 and the second tension bar 44 non-rotatable, the user can increase the tension applied to the medium M. By making either the first tension bar 43 or the second tension bar 44 rotatable, the user can adjust the tension applied to the medium M.

[0052] As shown in FIGS. 5 and 6, the first tension bar 43 is rotatable and the second tension bar 44 is rotatable. The printer 10 has a first adjustment mechanism that rotates or makes non-rotatable the first tension bar 43 when the medium M is conveyed, and a second adjustment mechanism that rotates or makes non-rotatable the second tension bar 44 when the medium M is conveyed. The slidability of the medium M with respect to the first tension bar 43 and the slidability of the medium M with respect to the second tension bar 44 can be individually adjusted, facilitating the adjustment of the tension and conveyance performance of the medium M.

[0053] The first adjustment mechanism and the second adjustment mechanism are not limited to the configuration shown in FIG. 6. The first adjustment mechanism may be any configuration that can adjust the rotation of the first tension bar 43. The second adjustment mechanism may be any configuration that can adjust the rotation of the second tension bar 44. As an example, the first adjustment mechanism may include a brake member that presses against the first tension bar shaft 151 to apply a braking force, and a drive mechanism that moves the brake member into contact with or away from the first tension bar shaft 151. The second adjustment mechanism may include a brake member that presses against the second tension bar shaft 155 to apply a braking force, and a drive mechanism that moves the brake member into contact with or away from the second tension bar shaft 155.

[0054] FIGS. 7 and 8 show a configuration in which a cover member 161 is provided on the second tension bar 44. FIG. 7 is a view of the second tension bar 44 seen from the axial direction. FIG. 8 is a view of the second tension bar 44 seen from a direction perpendicular to the axis. The second tension bar 44 in FIG. 8 shows a state in which the medium M is wound around it.

[0055] The second tension bar 44 has the cover member 161 wound around it. The cover member 161 is fixed to the surface of the second tension bar 44 by a cover fixing member 163. The cover member 161 is made of a rubber member such as silicone resin. The rubber member has a higher coefficient of friction than the metal materials used for the first tension bar 43 and the second tension bar 44. The frictional resistance on the surface of the rubber member is higher than the frictional resistance on the surfaces of the first tension bar 43 and the second tension bar 44. By using the cover member 161, the user can reduce the slidability with the medium M and reduce the tension fluctuation of the medium M. The material of the cover member 161 is not limited to a rubber member. The material of the cover member 161 may be any material that has a higher frictional resistance than the surface frictional resistance of the second tension bar 44. The cover member 161 corresponds to an example of a friction member.

[0056] The axial width of the cover member 161 is wider than the axial width of the medium M. Since the width of the cover member 161 is wider than the width of the medium M, it is possible to prevent the medium M from coming into direct contact with the second tension bar 44. As shown in FIG. 8, the cover fixing member 163 fixes the cover member 161 outside the conveyance area of the medium M. By being located outside the conveyance area of the medium M, the cover fixing member 163 can prevent interference with the medium M.

[0057] As shown in FIGS. 7 and 8, the cover member 161 is fixed to the second tension bar 44, but is not limited thereto. The cover member 161 may be provided on the first tension bar 43. The cover member 161 may be provided on both the first tension bar 43 and the second tension bar 44.

[0058] At least one of the first tension bar 43 and the second tension bar 44 is detachable from the cover member 161 having a surface with a higher coefficient of friction than the surfaces of the first tension bar 43 and the second tension bar 44.

[0059] The cover member 161 is detachable by removing the cover fixing member 163. The user can set desirable conveyance conditions for the conveyance of the medium M by attaching and detaching the cover member 161 according to the type of the medium M used in the printer 10.

[0060] The printer 10 is detachable from the cover member 161 having a surface with a higher coefficient of friction than the surfaces of the first tension bar 43 and the second tension bar 44 with respect to at least one of the first tension bar 43 and the second tension bar 44. The user can adjust the slidability of the medium M by attaching and detaching the cover member 161, and can increase the degree of freedom in adjusting the frictional force between at least one of the first tension bar 43 and the second tension bar 44 and the medium M.

Explanation of Reference Numerals

[0061] 10… Printer, 20… Printing unit, 21… Supply guide frame, 22… First conveyance roller, 23… Second conveyance roller, 24… Conveyance roller pair, 25… Platen, 26… Print head, 27… Discharge guide frame, 30… Supply unit, 31… Media roll support shaft, 32… Supply guide member, 33… Supply bar member, 34… Supply bar support member, 40… Media take-up unit, 41… Media take-up member, 42… Take-up member rotation shaft, 43… First tension bar, 44… Second tension bar, 46… Tension bar support member, 49… Tension bar swing shaft, 50… Control unit, 60… Media roll, 70… Printed media roll, 141… Guide member, 142… First support frame, 143… Second support frame, 144… Frame fixing member, 151… First tension bar shaft, 152… First bearing, 153… First frame hole, 154… First rotation adjustment member, 155… Second tension bar shaft, 156… Second bearing, 157… Second frame hole, 158… Second rotation adjustment member, 161… Cover member, 163… Cover fixing member, M… Media, M1… Take-up start position, M2… Separation position, HL… Horizontal line, ML… Media movement line.

Claims

1. A recording unit capable of recording on a medium, A transport unit capable of transporting the medium, A winding unit that rotates about a rotation axis and is capable of winding the medium transported by the transport unit, A first bar member capable of winding around the first surface of the medium, A second bar member disposed between the first bar member and the winding unit and capable of winding around the second surface of the medium, An arm member capable of swinging about a swing axis that coincides with the rotation axis, and comprising: The arm member, Supports the first bar member and the second bar member, The arm member has a gap adjustment mechanism for changing the gap between the first bar member and the second bar member, A recording device.

2. A recording unit capable of recording on a medium, A transport unit capable of transporting the medium, A winding unit that rotates about a rotation axis and is capable of winding the medium transported by the transport unit, A first bar member capable of winding around the first surface of the medium, A second bar member disposed between the first bar member and the winding unit and capable of winding around the second surface of the medium, An arm member capable of swinging about a swing axis that coincides with the rotation axis, and comprising: The arm member supports the first bar member and the second bar member, The first bar member is rotatable, The second bar member is rotatable, A first adjustment mechanism for rotating or disabling rotation of the first bar member when the medium is transported, A second adjustment mechanism for rotating or disabling rotation of the second bar member when the medium is transported, and having: A recording device.

3. A recording unit capable of recording on a medium, A transport unit capable of transporting the medium, A winding unit that rotates about a rotation axis and is capable of winding the medium transported by the transport unit, A first bar member capable of winding around the first surface of the medium, A second bar member disposed between the first bar member and the winding unit and capable of winding around the second surface of the medium, An arm member capable of swinging about a swing axis that coincides with the rotation axis, and comprising: The arm member supports the first bar member and the second bar member, At least one of the first bar member and the second bar member is detachable from a friction member having a surface with a higher coefficient of friction than the surfaces of the first bar member and the second bar member, A recording device.

4. A transport unit capable of transporting a medium, A take-up unit that rotates about a rotation axis and can take up the media conveyed by the conveyance unit, A first bar member that can press against the first surface of the media, A second bar member that is disposed between the first bar member and the take-up unit and can wind around the second surface of the media, An arm member that supports the first bar member and the second bar member and can swing about a swing axis that coincides with the rotation axis, The arm member, Supports the first bar member and the second bar member, Has a gap adjustment mechanism for changing the gap between the first bar member and the second bar member, Conveying device.

5. A conveyance unit capable of conveying media, A take-up unit that rotates about a rotation axis and can take up the media conveyed by the conveyance unit, A first bar member that can press against the first surface of the media, A second bar member that is disposed between the first bar member and the take-up unit and can wind around the second surface of the media, An arm member that supports the first bar member and the second bar member and can swing about a swing axis that coincides with the rotation axis, The arm member, Supports the first bar member and the second bar member, The first bar member is rotatable, The second bar member is rotatable, A first adjustment mechanism for rotating or disabling rotation of the first bar member when the media is conveyed, A second adjustment mechanism for rotating or disabling rotation of the second bar member when the media is conveyed, Conveying device.

6. A conveyance unit capable of conveying media, A take-up unit that rotates about a rotation axis and can take up the media conveyed by the conveyance unit, A first bar member that can press against the first surface of the media, A second bar member that is disposed between the first bar member and the take-up unit and can wind around the second surface of the media, An arm member that supports the first bar member and the second bar member and can swing about a swing axis that coincides with the rotation axis, The arm member, Supports the first bar member and the second bar member, At least one of the first bar member and the second bar member is detachable from a friction member having a surface with a higher coefficient of friction than the surface of the first bar member and the surface of the second bar member, Conveying device.

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