Winding device and printing winding system

Abstract

To provide a winding device and a printing winding system that can improve a print quality.SOLUTION: A winding device includes: a winding unit that winds up a print medium 100 discharged from a printing device 2; a support shaft 207 that rotatably supports the winding unit; and a drive force transmission member that transmits a drive force for rotating the winding unit from the printing device to the winding unit. The winding unit includes a winding core 201 that winds the print medium 100 around a circumferential surface thereof, and a flange that guides a winding position of the print medium 100 when the print medium 100 is wound onto the winding core 201. A first engagement portion provided on the drive force transmission member is engaged with a second engagement portion of the flange to rotate the winding core 201, and the winding core 201 is configured to be movable axially along the support shaft 207.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a winding device and a printing winding system. [Background technology]

[0002] Patent document 1 discloses a winding device that includes a winding section that winds up printing paper, which is the printing medium discharged from a printing device, a support shaft that rotatably supports the winding section, and a drive force transmission member that transmits the drive force for rotating the winding section from the printing device to the winding section. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-134686 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in Patent Document 1, the winding section does not move in the axial direction of the support shaft, so when the paper edge of the printing paper in the printing device varies, there is a risk that the printing medium will come into strong contact with the side of the flange provided in the winding section during the winding operation, which could result in poor winding. [Means for solving the problem]

[0005] One aspect of the present invention that solves the above problem is a winding device that includes a winding unit that winds up printing medium discharged from a printing device, a support shaft that rotatably supports the winding unit, and a drive force transmission member that transmits a drive force for rotating the winding unit from the printing device to the winding unit, wherein the winding unit includes a winding core that winds the printing medium around its circumferential surface, and a flange that guides the winding position of the printing medium when winding the printing medium onto the winding core, and a first engagement portion provided on the drive force transmission member engages with a second engagement portion of the flange to rotate the winding core, and the winding core is configured to be movable axially along the support shaft.

[0006] Another aspect of the present invention that solves the above problem is a printing and winding system that includes the winding device and the printing device. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 2 is a perspective view of the printing and winding system as seen from the front side. [Figure 2] FIG. 2 is a side view of the main part showing each part relating to the transport path of the print winding system. [Figure 3] FIG. 2 is a side view of the main part showing each part relating to the transport path of the print winding system. [Figure 4] FIG. 2 is a side view of the main part showing each part relating to the transport path of the print winding system. [Figure 5] VV cross section of Figure 4. [Figure 6] FIG. 6 is an enlarged view of the VI range in FIG. 5. [Figure 7] FIG. 7 is an enlarged view of the range VII in FIG. 5. [Figure 8] 1 is a plan view showing an outline of a print winding system 1. FIG. [Figure 9] 1 is a plan view showing an outline of a print winding system 1. FIG. [Figure 10] 1 is a plan view showing an outline of a print winding system 1. FIG. [Figure 11] 1 is a plan view showing an outline of a print winding system 1. FIG. [Figure 12] 1 is a plan view showing an outline of a print winding system 1. FIG. [Figure 13] FIG. 6 is an enlarged view of the range VI in FIG. 5 according to a modified example. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, an embodiment of the present disclosure will be described with reference to the drawings. In the description, directions such as front, back, left, right, and up and down are the same as the directions relative to the printing device 2 shown in each drawing unless otherwise specified. Also, in each drawing, the symbol FR indicates the front of the printing device 2, the symbol UP indicates the top of the printing device 2, and the symbol LH indicates the left of the printing device 2.

[0009] FIG. 1 is a perspective view of the print winding system 1 as seen from the front side. In FIG. 1, for convenience of explanation, the transport direction C, the cross direction I, and the print medium 100 are indicated by dashed lines. As shown in FIG. 1, the printing and rewinding system 1 includes a printing device 2 and a rewinding device 120 attached to the printing device 2. The printing device 2 is a so-called line-type inkjet printer that has a line-shaped inkjet head and ejects ink from the inkjet head to print characters and images on a printing medium.

[0010] The print medium used for printing in the printer 2 is a continuous sheet made of paper, synthetic resin, etc. For example, it may be fine paper that has been surface-treated to enhance ink absorption and fixation, making it suitable for inkjet printing.

[0011] Examples of continuous sheets include roll paper that is stored in a rolled state in the printing device 2, and fanfold paper that is supplied in a folded state to the printing device 2 from outside the printing device 2. As roll paper, in addition to plain paper or fine paper that is rolled up in a roll, label paper that is made by arranging standard-sized labels with adhesive on the backing on release paper and rolling them up in a roll may also be used.

[0012] The printing device 2 includes a device case 10. The device case 10 is made up of a combination of side panels, a front panel, and the like, and forms the outer shell of the printing device 2. A display and operation panel 12 with a display, operation buttons, etc., is provided in the upper half near the left side of the front of the device case 10. A slit-shaped paper outlet 14 extending in the left-right direction is formed in the front of the device case 10, approximately in the center near the right side. The printing device 2 discharges printed print media 100 from the paper outlet 14.

[0013] An openable paper cover 16 is provided at the rear of the device case 10, extending from the right side to the top. A storage section 20 is provided inside the paper cover 16. In the printing device 2, a rolled print medium 100 can be loaded into the storage section 20 by opening the paper cover 16.

[0014] Fig. 2 is a side view of the main parts showing the components related to the transport path R of the print winding system 1. For ease of explanation, Fig. 2 shows the print medium 100 on the transport path R with a dashed line. In the subsequent drawings, for ease of explanation, the print medium 100 on the transport path R is shown with a dashed line, as in Fig. 2. The printing device 2 includes a storage unit 20 that stores print media 100, a printing unit 22 that prints on the print media 100, and a transport unit 24 that transports the print media 100 from the storage unit 20 to the printing unit 22. The storage unit 20 is provided on the rear side, and the printing unit 22 is provided on the front side of the storage unit 20. The transport unit 24 is provided below the printing unit 22.

[0015] The storage unit 20 includes a roll shaft 26 on which the print medium 100 is attached. The roll shaft 26 is a rod-shaped member that is rotatable in the circumferential direction. The print medium 100 is stored in the storage unit 20 by inserting the roll shaft 26 into the center of the roll of print medium 100. A drive device such as a motor may be connected to the roll shaft 26, and the roll shaft 26 may rotate in response to the drive of the drive device. In the printing device 2, the print medium 100 rotates as the roll shaft 26 rotates.

[0016] In the printing device 2, a transport path R is formed along which one end of the print medium 100 attached to the roll shaft 26 is pulled out and transported to the paper discharge port 14. In the transport path R, a tension lever 28 is attached above the print medium 100 stored in the storage section 20. The tension lever 28 is formed in a columnar shape that has a curved surface in the circumferential direction and extends in the left-right direction. The tension lever 28 applies tension to the print medium 100 to prevent it from sagging. One end of the printing medium 100 is pulled upward, contacts the tension lever 28, is bent, and then extends forward.

[0017] A paper guide unit 30 is provided in front of the tension lever 28. The paper guide unit 30 guides the print medium 100 forward, and also prevents the print medium 100 from skewing or shifting in the conveyance of the print medium 100.

[0018] A paper guide unit 30 is provided in front of the tension lever 28. The paper guide unit 30 guides the print medium 100 forward, and also prevents the print medium 100 from skewing or shifting in the conveyance of the print medium 100. The paper guide unit 30 includes a lower guide member 32 that supports the print medium 100 from below, and a paper pressing member 34 that is positioned on the upper surface side of the print medium 100 . The print medium 100 is conveyed in the paper guide unit 30 while being sandwiched between the lower guide member 32 and the paper pressing member .

[0019] A printing unit 22 that prints on the print medium 100 is provided in front of the paper guide unit 30. The printing unit 22 includes a platen 40 and a print head 42. In this embodiment, the print head 42 ejects ink of four colors: C (cyan), M (magenta), Y (yellow), and K (black) to form dots on the printing surface of the label. The print head 42 includes a nozzle unit 41 that ejects K (black) ink, a nozzle unit 43 that ejects C (cyan) ink, a nozzle unit 45 that ejects M (magenta) ink, and a nozzle unit 47 that ejects Y (yellow) ink.

[0020] In the nozzle sections 41 to 47, a plurality of nozzles that eject ink are arranged in a row in the width direction of the printing medium 100. The nozzles of each of the nozzle sections 41 to 47 are arranged along a cross direction I that crosses the transport direction C. As shown in FIG. 1 , in this embodiment, the cross direction I is a direction that is perpendicular to the transport direction C. The cross direction I coincides with the width direction of the printing medium 100.

[0021] The print head 42 is a line inkjet head that can eject ink without scanning in the width direction of the print medium 100. Therefore, the nozzle row of the nozzle units 41 to 47 is formed to have a width that is at least the same as or wider than the printable range of the print medium 100. In this embodiment, the printable range corresponds to the printing surface of the label. In this embodiment, an example configuration is given in which the nozzle sections 41, 43, 45, and 47 are arranged in this order along the transport direction C of the print medium 100, but the arrangement order of the nozzles for each color in the transport direction C is arbitrary.

[0022] The platen 40 has a flat surface that is arranged along the transport direction C. This flat surface is located below the transport path R and faces the print head 42. The nozzle units 41 to 47 and the platen 40 are arranged with a gap, which is a so-called platen gap, between them. The platen 40 supports the print medium 100 from below. The platen 40 is provided over at least the entire printing range of the printing unit 22. The flat surface of the platen 40 is arranged approximately horizontally when the printing device 2 is installed and in use.

[0023] The transport section 24 includes a cylindrical transport roller 50. The transport roller 50 is disposed so that its longitudinal direction extends along the transverse direction I, and is provided so as to be rotatable in the circumferential direction. The transport roller 50 is disposed in front of the paper guide unit 30 and at the rear end of the platen 40.

[0024] For example, a driven wheel is provided at one end of the transport roller 50. A transmission belt 51 is wound around the driven wheel. This transmission belt 51 is wound around a drive shaft provided in a transport motor 52. In this way, the transport roller 50 and the transport motor 52 are connected via the transmission belt 51. The transport motor 52 is a drive device that rotates the transport roller 50. The transport motor 52 can rotate in two directions: a direction that sends out the print medium 100 from the storage unit 20 toward the paper discharge outlet 14, and a direction that sends out the print medium 100 from the paper discharge outlet 14 toward the printing unit 22. The transport motor 52 and the transmission belt 51 are provided below the platen 40.

[0025] The transport unit 24 includes a plurality of paper feed driven rollers 54. The paper feed driven rollers 54 are rotatably arranged along the longitudinal direction of the transport roller 50. Each of the paper feed driven rollers 54 is biased so that its circumferential surface contacts the circumferential surface of the transport roller 50. As a result, the transport roller 50 and the paper feed driven roller 54 are arranged opposite each other. Therefore, the transport roller 50 is disposed on the lower guide member 32 side, and the paper feed driven roller 54 is disposed on the paper pressing member 34 side.

[0026] In the transport unit 24, the transport motor 52 is driven to rotate the transport roller 50 via the transmission belt 51, which in turn rotates the paper feed driven roller 54. As a result, the print medium 100 loaded between the lower guide member 32 and the paper pressing member 34 is sandwiched between the transport roller 50 and the paper feed driven roller 54, and is transported to the printing unit 22 as the transport roller 50 is rotated. When the print medium 100 is transported to the printing unit 22, it is printed by the printing unit 22. Thereafter, the print medium 100 is discharged from the paper discharge port 14 by the driving of the transport unit 24.

[0027] In the printing device 2, the transport motor 52 is driven in the direction opposite to the rotation direction that sends out the print medium 100 from the storage unit 20 toward the paper discharge outlet 14, so that the print medium 100 discharged from the paper discharge outlet 14 can be pulled back to the printing unit 22. Then, in the printing device 2, the printing unit 22 can print on the print medium again. In the following description, the direction in which the printing medium 100 is sent from the storage section 20 toward the paper discharge outlet 14 is referred to as the forward feed direction, and the direction in which the printing medium 100 is pulled back from the paper discharge outlet 14 toward the printing section 22 is referred to as the reverse feed direction.

[0028] The transport rollers 50 may be disposed on the side of the lower guide member 32, in other words, on the side of the paper guide unit 30. Also, for example, instead of the transport rollers 50, the transport section 24 may be provided with a transport belt that can move on the upper surface of the platen 40.

[0029] In the printing device 2, a label detector 56 is provided downstream of the paper guide unit 30 and upstream of the transport roller 50 on the transport path R. The label detector 56 detects the leading and trailing ends of the print medium 100 and the leading and trailing ends of the label. The label detector 56 is, for example, an optical transmission sensor that includes a light-emitting unit 58 on the underside of the print medium 100 and a light-receiving unit 59 on the upper side of the print medium 100 on the conveyance path R. The light-emitting unit 58 and the light-receiving unit 59 are arranged facing each other in the vertical direction with a gap large enough to allow the print medium 100 to pass through. In other words, the light-emitting unit 58 and the light-receiving unit 59 are arranged at approximately the same position in the front-to-rear direction.

[0030] The label detector 56 may be located downstream of the transport roller 50 and upstream of the print head 42. Alternatively, for example, the light-emitting unit 58 may be located on the paper pressing member 34 side, and the light-receiving unit 59 may be located on the lower guide member 32 side. Similarly, the light-emitting unit 58 may be located on the platen 40 side, and the light-receiving unit 59 may be located on the print head 42 side.

[0031] The light emitting unit 58 uses a light emitting element such as an LED (Light-emitting diode). A light receiving element such as a phototransistor, a photo IC, or a photodiode is used for the light receiving unit 59. When the light receiving element receives light with a signal strength equal to or greater than a predetermined value, it outputs a detection voltage as an output value indicating the amount of received light according to the amount of received light.

[0032] In the label detector 56, the light-emitting unit 58 and the light-receiving unit 59 can be positioned so that the light-receiving unit 59 can receive the light emitted from the light-emitting unit 58 at a predetermined signal intensity. In this case, the output value indicating the amount of light received by the light-receiving unit 59 differs depending on whether there is no print medium 100 directly below the light-receiving unit 59, whether there is a backing sheet, or whether there is a label. Therefore, the label detector 56 can detect the leading and trailing ends of the print medium 100 and the leading and trailing ends of the label based on the output value indicating the amount of light received by the light-receiving unit 59.

[0033] A cutter unit 110 is disposed downstream, i.e., in front, of the print head 42. The cutter unit 110 includes a fixed blade 112 and a movable blade 114 disposed on either side of the conveyance path R, and the movable blade 114 is connected via a gear or the like to a drive device, such as a motor, that drives the cutter. When the motor is driven, the movable blade 114 moves toward the fixed blade 112 and cuts the print medium 100. The cutter unit 110 may be configured to leave a portion of the print medium 100 uncut in the width direction, or to completely cut the print medium 100. The printing device 2 uses the cutter unit 110 to cut the print medium 100 printed by the print head 42 to a predetermined length and ejects the print medium from the paper exit 14. The cutter unit 110 may be formed separately from the printing device 2 and may be detachably provided on the front surface of the printing device 2, for example.

[0034] The printing device 2 includes a control board 18 that controls each part of the printing device 2. The control board 18 includes a CPU, ROM, RAM, etc. as an arithmetic execution unit. Firmware executable by the CPU, data related to the firmware, etc. are stored in a non-volatile manner in the ROM of the control board 18. In addition, data related to the firmware executed by the CPU, etc. are temporarily stored in the RAM. The control board 18 may also include other peripheral circuits, etc. The control board 18 may also include a storage unit that can non-volatilely store various programs and data, such as control programs and data related to these control programs.

[0035] The control board 18 is configured to be able to detect user operations, the amount of transport of the print medium 100, and the like. The control board 18 is configured to be able to control the drive devices provided in the printing device 2, such as the transport motor 52. The control board 18 supplies voltage to the pump that supplies ink from the ink tank in the print head 42 and the piezoelectric elements provided in the nozzle portions 41 to 47 of the print head 42, to operate them. As a result, in the printing device 2, ink droplets are ejected from each nozzle of the nozzle portions 41 to 47 to form dots. The control board 18 is configured to be able to cause the light emitting element to emit light and to be able to acquire the detection value of the label detector 56. That is, the label detector 56 functions as a detection means in cooperation with the control board 18.

[0036] 3 is a side view of the main parts showing the parts related to the transport path R of the print winding system 1. In FIG. 3, the lever 90 and the friction part 130 are omitted. As shown in Figures 2 and 3, the front of the printing device 2 is formed below the paper discharge port 14 so that the winding device 120 can be detachably attached. The winding device 120 is equipped with a winding drum 122 that winds up the printing medium 100 discharged from the paper discharge port 14. The winding drum 122 is a columnar or cylindrical shaft member whose longitudinal direction extends along the transverse direction I. The winding drum 122 corresponds to the "winding section." The take-up drum 122 is driven by power input from the transport motor 52 via a printing-side power transmission mechanism 60 provided in the printing device 2 and a take-up-side power transmission mechanism 70 provided in the take-up device 120.

[0037] As shown in FIG. 3, the printing-side power transmission mechanism 60 includes an output gear 62 that is connected to the output shaft of the transport motor 52 , and a connecting gear 64 that meshes with the output gear 62 .

[0038] The take-up side power transmission mechanism 70 includes a connecting gear 72 provided at the end of the take-up device 120 that is located on the printing device 2 side. The winding-side power transmission mechanism 70 includes a small pulley 74 and a large pulley 76, which share the same shaft as the connecting gear 72. An endless belt 78 is stretched between the small pulley 74 and the large pulley 76. The winding-side power transmission mechanism 70 includes an intermediate gear 80, which shares the same shaft as the large pulley 76, and a shaft gear 82 that meshes with the intermediate gear 80. The shaft gear 82 shares the same shaft as the winding drum 122. The shaft gear 82 corresponds to the "driving force transmission member."

[0039] In the printing and rewinding system 1, when the rewinding device 120 is attached to the front of the printing device 2, the connecting gear 64 and the connecting gear 72 mesh together, thereby connecting the printing-side power transmission mechanism 60 and the rewinding-side power transmission mechanism 70. When the transport motor 52 is driven to feed the printing medium 100 in the forward feed direction, the winding drum 122 is driven by power input from the transport motor 52 via the printing side power transmission mechanism 60 and the winding side power transmission mechanism 70.

[0040] The winding drum 122 rotates toward the front of the printing device 2 and winds up the printing medium 100 that is discharged from the paper discharge port 14. When the winding device 120 is used, the printing device 2 does not cut the printing medium 100 with the cutter unit 110, but instead discharges the printing medium 100 in a long state from the paper discharge port 14. The winding device 120 can, for example, print an entire roll of printing medium 100 stored in the storage unit 20 in a single operation of the printing device 2, and then wind the printing medium 100 onto the winding drum 122 by rotating the winding drum 122 in the winding direction.

[0041] 4 is a side view of the main parts showing the components related to the transport path R of the print winding system 1. In FIG. 4, the print side power transmission mechanism 60 and the winding side power transmission mechanism 70 are omitted. 4, the winding device 120 includes a lever 90. The lever 90 includes a lever roller 92 and a roller shaft 94 that supports the lever roller 92 rotatably.

[0042] One end of the roller shaft 94 is inserted into a movement opening 121 provided in the winding device 120. The movement opening 121 is an opening disposed between the paper discharge port 14 and the winding drum 122 in the conveyance direction C. When viewed from the transverse direction I, the movement opening 121 is formed in an arc shape centered on the rotation axis of the winding drum 122. The roller shaft 94 inserted through the movement opening 121 is cantilevered by the winding device 120 so as to extend parallel to the winding drum 122 while being biased downward in the vertical direction by a biasing member such as a spring.

[0043] Lever roller 92 has a cylindrical shape that extends approximately parallel to take-up drum 122 while being inserted through roller shaft 94. Lever roller 92 has a length dimension that is at least equal to or greater than the width dimension of print medium 100. The outer circumferential surface of lever roller 92 is formed from a rubber material or the like that has a predetermined coefficient of friction.

[0044] The print medium 100 delivered from the paper discharge port 14 is wound around the outer peripheral surface located on the lower side of the lever 90 and then wound onto the winding drum 122. As described above, the lever 90 is attached to the winding device 120 through the movement opening 121 in a state where it is biased by the biasing member. This allows the lever 90 to move up and down in the vertical direction according to the tension of the wound print medium 100. Therefore, in the print winding system 1, the lever 90 can reduce the tension applied to the print medium 100. In this embodiment, the lever 90 is movable in the vertical direction from below the rotation shaft of the winding drum 122 to a position at approximately the same height as the rotation shaft of the winding drum 122.

[0045] In the winding device 120, the print medium 100 is wound around the lever 90, and is transported in a state where it is bent downward. As a result, in the print and winding system 1, even if there is variation in the mounting position when the winding device 120 is mounted on the printing device 2, it is possible to prevent the print medium 100 from being fed skewed.

[0046] The lever roller 92 rotates due to friction with the fed print medium 100. Therefore, in the print take-up system 1, the lever 90 prevents the print surface of the print medium 100 from being rubbed.

[0047] The winding device 120 includes a friction unit 130. The friction unit 130 includes a friction roller 132 and a roller shaft 134 that rotatably supports the friction roller 132. The roller shaft 134 is fixed between the paper discharge outlet 14 and the lever 90 in the conveying direction C so as to extend substantially parallel to the lever 90.

[0048] The friction roller 132 has a cylindrical shape that extends approximately parallel to the winding drum 122 while being inserted through the roller shaft 134. The friction roller 132 has a length dimension that is at least equal to or greater than the width dimension of the print medium 100. The outer circumferential surface of the friction roller 132 is formed from a rubber material or the like that has a predetermined coefficient of friction. The print medium 100 sent out from the paper discharge port 14 is wound around the outer peripheral surface located on the upper side of the friction roller 132, and then taken up onto the take-up drum 122 via the lever 90.

[0049] When the printing medium 100 is fed in the forward feed direction, a force acts on the printing medium 100 in a direction that pulls the printing medium 100 out of the printing device 2 . In this embodiment, frictional resistance is applied by the friction roller 132, and a frictional force is applied in the opposite direction to the frictional resistance. This allows the winding device 120 to prevent a decrease in the accuracy with which the printing device 2 feeds the print medium 100. As a result, the print and winding system 1 prevents deviations in the ink landing position, and thus prevents a decrease in print quality.

[0050] Fig. 5 is a VV cross-sectional view of Fig. 4. Fig. 5 is a view of a cross section taken along a plane perpendicular to the vertical direction, parallel to support shaft 207, and passing through support shaft 207, viewed from above. Fig. 6 is an enlarged view of the area surrounded by VI in Fig. 5. Fig. 7 is an enlarged view of the area indicated by VII in Fig. 5. The take-up drum 122 takes up the print medium 100 discharged from the paper discharge port 14 of the printing device 2 . 5, the take-up drum 122 includes a take-up core 201 that winds the printing medium 100 onto its circumferential surface. The take-up drum 122 includes a base flange 203 that guides the winding position of the printing medium 100 when the printing medium 100 is wound onto the take-up core 201, and a tip flange 205 that is attached to the tip side of the take-up core 201 so as to face the base flange 203. The tip flange 205 includes a positioning lever 206 that can be moved in the axial direction of the take-up core 201 by operating the positioning lever 206, making the attachment position of the tip flange 205 changeable.

[0051] The winding drum 122 is rotatably supported by a support shaft 207. The support shaft 207 is supported in a so-called cantilevered manner by an inner member 212 and an outer member 213 that form the frame of the winding device 120. In the following description, the end of the support shaft 207 supported by the inner member 212 and the outer member 213 will be referred to as the first end 207A, and the other end located opposite the first end 207A will be referred to as the second end 207B.

[0052] The inner member 212 is disposed substantially parallel to and facing the base flange 203. The outer member 213 is disposed on the opposite side of the base flange 203 with the inner member 212 interposed therebetween. The shaft gear 82 of the winding-side power transmission mechanism 70 is disposed between the inner member 212 and the outer member 213. The support shaft 207 passes through the shaft gear 82.

[0053] As shown in Fig. 6, a plurality of protrusions 215 are formed on the shaft gear 82. The protrusions 215 correspond to the "first engagement portion." Furthermore, a plurality of through holes 216 are formed on the base flange 203, with which the plurality of protrusions 215 engage. The through holes 216 correspond to the "second engagement portion." In the print winding system 1, the protrusion 215 provided on the shaft gear 82 is engaged with the through-hole 216 of the base flange 203, and the base flange 203 is rotated to rotate the winding core 201. The base flange 203 corresponds to the "flange."

[0054] The protrusion 215 includes a seat portion 215A formed on the shaft gear 82 and an engaging protrusion 215B formed on the seat portion 215A and adapted to engage with the through-hole 216. In a normal state where the base flange 203 is at a reference position, a first gap δ1 is formed between the base portion 215A and the base flange 203, allowing the take-up core 201 to move in the longitudinal direction of the support shaft 207. In the following description, the surface of the base portion 215A facing the base flange 203 in which the through hole 216 is formed will be referred to as the convex side facing surface 218, and the surface of the base flange 203 in which the through hole 216 is formed facing the convex side facing surface 218 will be referred to as the through hole side facing surface 219.

[0055] As shown in FIG. 7, a restricting ring 217 is attached to the tip of the support shaft 207 to restrict the movement of the take-up core 201 in the axial direction. The restriction ring 217 corresponds to a "movement limiting portion." A gap is provided between the tip of the winding core 201 and the restriction ring 217, forming a second gap δ2 that allows the winding core 201 to move in the longitudinal direction of the support shaft 207. In the following description, the surface of the winding core 201 that faces the restriction ring 217 is referred to as a winding-core-side facing surface 221 .

[0056] 8 to 12 are plan views showing an outline of the print winding system 1. FIG. Here, in the print winding system 1, variations occur that deviate from the reference state by a predetermined dimension due to factors such as assembly errors of various parts and tilt. If there are assembly errors in various parts, as shown in Figure 8, positional variation L1 will occur from the main body paper edge reference K1 to the winding position K2, and positional variation L2 will occur from the winding position K2 to the side of the base flange 203.

[0057] When the paper guide unit 30 has an inclination θ2, a positional variation L3 occurs from the winding position K2 to the side surface of the base flange 203, as shown in FIG. When the transport roller 50 has an inclination θ3, as shown in FIG. 10, a positional variation L4 occurs from the main body paper edge reference K1 to the flange paper edge K3. When the rear end of the printing section 22 is inclined at an angle θ4, a positional variation L5 occurs from the flange paper edge K3 to the side surface of the base flange 203, as shown in FIG. When the printing section 22 has an inclination θ5, a positional variation L6 occurs from the flange section paper edge K3 to the side surface of the base flange 203, as shown in FIG.

[0058] In this embodiment, each variation L1 to L6 is calculated, and the total value thereof is regarded as the variation of the paper end of the winding device 120 with respect to the main body paper edge reference K1. From this variation, in this embodiment, the first gap δ1 is set to 3 mm on the base flange 203 side, and the second gap δ2 is set to 3.4 mm on the tip end side of the support shaft 207. Within the range of each gap, the winding core 201 is set to be movable in the direction of the support shaft 207.

[0059] Here, the relationship between the conveyance torque T2 and the conveyance load torque T1 will be described. When there is almost no first gap δ1 and second gap δ2, if variations occur at the paper end of the winding device 120, the printing medium is strongly in contact with the side surface of the base flange 203 or the side surface of the tip flange 205 during the winding operation. The conveyance load torque T1 generated at this time is expressed by the following formula (1). T1 = F × r (1) In formula (1), T1 represents the conveyance load torque, F represents the contact force between the paper end and the base flange 203 or the tip flange 205, and r represents the radius of the winding diameter.

[0060] Here, when the conveyance torque is T2, at the initial stage of winding, since the winding diameter r is small, T1 < T2, and no winding defect occurs. At the end stage of winding, the winding diameter r becomes large, T1 > T2, and the conveyance load torque T1 exceeds the conveyance torque T2, resulting in a winding defect.

[0061] The take-up drum 122 of the present embodiment is formed to be movable on both axial sides in the axial direction of the support shaft 207. As a result, the movable distance of the take-up drum 122 in the axial direction of the support shaft 207 increases. Therefore, in the printing take-up system 1 of the present embodiment, when the conveying load torque T1 exceeds the conveying torque T2 at the end of the take-up, the take-up core 201 moves axially within the range of the first gap δ1 and the second gap δ2, so that the contact force F can be kept small. As a result, in the printing take-up system 1, even if the take-up diameter r increases, it is possible to maintain T1 < T2, and the occurrence of take-up defects can be suppressed. And in the printing take-up system 1 of the present embodiment, the take-up operation can be performed without strongly contacting the printing medium 100 with either the root flange 203 or the tip flange 205. Therefore, in the printing take-up system 1, the generation of the conveying load torque T1 can be suppressed, and the occurrence of take-up defects of the printing medium 100 can be suppressed.

[0062] In the printing take-up system 1 of the present embodiment, there may be a case where the take-up of the take-up core 201 of the printing medium 100 is started in a state where the take-up core side facing surface 221 and the regulating ring 217 are in contact. In this case, the engaging convex portion 215B is formed with a length dimension such that the convex portion side facing surface 218 and the through-hole side facing surface 219 do not contact each other while the printing medium 100 is being wound around the take-up core 201, and a length dimension that does not come out of the through-hole 216. As a result, in the printing take-up system 1 of the present embodiment, the contact between the shaft gear 82 and the root flange 203 is suppressed, the take-up defect is suppressed, and the shaft gear 82 and the take-up core 201 are connected in a state where the take-up core 201 is movable in the axial direction.

[0063] The above embodiment is merely a specific example to which the present disclosure is applied. The present disclosure is not limited to the configuration of the above embodiment, and can be implemented in various aspects without departing from the gist of the present disclosure.

[0064] Next, a modification of the present embodiment will be described. FIG. 13 is an enlarged view of the area surrounded by VI in FIG. 5 according to a modification of this embodiment. In the above-described embodiment, the base flange 203 is formed with a plurality of through holes 216 into which the protrusions 215 are engaged. 13, the base flange 203 may be provided with a recess 315 recessed toward the tip flange 205. The recess 315 is formed with a depth dimension such that when the engaging protrusion 215B is inserted, the engaging protrusion 215B does not entirely fit in, and when the winding drum 122 moves toward the tip flange 205, the engaging protrusion 215B does not slip out. This increases the distance that the take-up drum 122 can move in the axial direction of the support shaft 207. The recess 315 corresponds to the "second engagement portion."

[0065] Here, in the base flange 203 where the recess 315 is formed, the surface facing the convex portion side facing surface 218 is referred to as a recess portion side facing surface 319 . In the print take-up system 1 of this modified example, winding of the print medium 100 onto the take-up core 201 may be started with the take-up core-side facing surface 221 in contact with the restriction ring 217. In this case, the engaging protrusion 215B is formed with a length dimension that prevents the protrusion-side facing surface 218 from coming into contact with the recess-side facing surface 319 while the print medium 100 is being wound onto the take-up core 201, and that does not slip out of the recess 315.

[0066] As a result, in the printing winding system 1 of this embodiment, contact between the shaft gear 82 and the root flange 203 is suppressed, preventing winding failures, and the shaft gear 82 and the winding core 201 are connected in a state in which the winding core 201 can move axially.

[0067] In the print winding system 1, the base flange 203 may be provided with the engaging protrusion 215B, and the tip flange 205 may be provided with the recess 315.

[0068] In the above-described embodiment, a label printer has been exemplified as the printing device 2. However, the printing device 2 is not limited to a label printer. The printing device 2 may be any device that includes a transport device that transports a print medium and a printing unit that prints on the print medium. For example, the printing device 2 may be a large format printer or a textile printing machine that performs textile printing.

[0069] In the above embodiment, a line head type print head 42 is exemplified, but this is not limiting and a serial head type may also be used. Furthermore, the printing method of the print head 42 is not limited to the inkjet type.

[0070] Unless otherwise specified, the horizontal, vertical, and other directions, various numerical values, and shapes in the above-described embodiments include a so-called equivalent range that provides the same action and effect as those directions, numerical values, and shapes.

[0071] Summary of this disclosure A summary of this disclosure is provided below.

[0072] (Appendix 1) a winding device comprising: a winding unit that winds up a printing medium discharged from a printing device; a support shaft that rotatably supports the winding unit; and a drive force transmission member that transmits a drive force for rotating the winding unit from the printing device to the winding unit, wherein the winding unit comprises a winding core that winds the printing medium around its circumferential surface, and a flange that guides the winding position of the printing medium when winding the printing medium onto the winding core, wherein a first engagement portion provided on the drive force transmission member engages with a second engagement portion of the flange to rotate the winding core, and the winding core is configured to be movable axially along the support shaft. This makes it possible to prevent the occurrence of printing medium winding defects in the winding device.

[0073] (Appendix 2) 2. The winding device according to claim 1, wherein one of the first engaging portion and the second engaging portion is a convex portion and the other is a through hole. According to this, in the winding device, the winding core can be provided so as to be movable in the support shaft direction while the drive force transmission member and the winding core are connected to each other.

[0074] (Appendix 3) the support shaft has a first end that is one end positioned close to the flange in the longitudinal direction, and a second end that is the other end opposite the first end, and the second end is provided with a movement limiting portion that limits movement of the winding core in the longitudinal direction, and the surface of the member that forms the base of the convex portion that faces the member in which the through hole is formed is defined as the convex portion-side opposing surface, the surface of the member in which the through hole is formed is defined as the through hole-side opposing surface, and the surface of the winding core that faces the movement limiting portion is defined as the winding core-side opposing surface, when winding of the printing medium onto the winding core is started with the winding core-side opposing surface and the movement limiting portion in contact, the convex portion-side opposing surface and the through hole-side opposing surface do not come into contact with each other while winding the printing medium onto the winding core. This makes it possible to prevent the occurrence of printing medium winding defects in the winding device.

[0075] (Appendix 4) 2. The winding device according to claim 1, wherein one of the first engagement portion and the second engagement portion is a convex portion, and the other of the first engagement portion and the second engagement portion is a concave portion. According to this, in the winding device, the winding core can be provided so as to be movable in the support shaft direction while the drive force transmission member and the winding core are connected to each other.

[0076] (Appendix 5) The support shaft has a first end, which is one end positioned close to the flange in the longitudinal direction, and a second end, which is the other end positioned opposite the first end, and the second end is provided with a movement limiting portion that limits movement of the winding core in the longitudinal direction, and when the surface of the winding core facing the movement limiting portion is defined as the winding core side facing surface, if winding of the printing medium onto the winding core is started with the winding core side facing surface and the movement limiting portion in contact, the tip surface of the convex portion and the bottom surface of the concave portion do not come into contact with each other while the printing medium is being wound onto the winding core. This makes it possible to prevent the occurrence of printing medium winding defects in the winding device.

[0077] (Appendix 6) A printing and winding system comprising the winding device according to any one of Supplementary Note 1 to Supplementary Note 5 and the printing device. This allows the printing and winding system to achieve the same effects as the winding device described above. [Explanation of symbols]

[0078] 1...printing and rewinding system, 2...printing device, 14...paper discharge port, 20...storage section, 22...printing section, 24...transport section, 26...roll shaft, 40...platen, 42...printing head, 50...transport roller, 60...printing side power transmission mechanism, 70...rewinding side power transmission mechanism, 82...shaft gear (driving force transmission member), 94...roller shaft, 100...printing medium, 120...rewinding device, 121...movement opening, 122...rewinding drum (rewinding section), 201...rewinding core, 203...root flange (flange), 205...tip flange, 215...convex portion (first engagement portion), 215A...base portion, 215B...engaging convex portion, 216...through hole (second engagement portion), 217...regulating ring (movement limiting portion), 315...concave portion (second engagement portion), C...transport direction, I...intersecting direction.

Claims

1. a take-up unit that takes up the print medium discharged from the printing device; a support shaft that rotatably supports the winding section; a driving force transmission member that transmits a driving force for rotating the winding unit from the printing device to the winding unit; Equipped with The winding section a take-up core around which the printing medium is wound; a flange that guides a winding position of the printing medium when the printing medium is wound onto the winding core; Equipped with a first engaging portion provided on the driving force transmission member is engaged with a second engaging portion of the flange to rotate the winding core, and the winding core is configured to be movable in the axial direction along the support shaft; Winding device.

2. One of the first engaging portion and the second engaging portion is a protrusion, and the other is a through hole. The winding device according to claim 1.

3. The support shaft has a longitudinal direction a first end portion disposed adjacent to the flange; a second end portion that is the other end portion located opposite to the first end portion; Equipped with a movement limiting portion that limits movement of the winding core in the longitudinal direction is provided at the second end portion; a surface of the member that serves as a base of the protrusion, the surface facing the member in which the through hole is formed, is defined as a protrusion-side facing surface; When the surface of the member in which the through hole is formed that faces the convex portion side facing surface is defined as a through hole side facing surface, and the surface of the winding core that faces the movement limiting portion is defined as a winding core side facing surface, When the winding of the print medium onto the winding core is started in a state where the winding core side facing surface and the movement limiting portion are in contact with each other, The convex portion-side opposing surface and the through-hole-side opposing surface do not come into contact with each other while the printing medium is being wound around the winding core. The winding device according to claim 2.

4. one of the first engaging portion and the second engaging portion is a convex portion, The other of the first engaging portion and the second engaging portion is a recess. The winding device according to claim 1.

5. The support shaft has a longitudinal direction a first end portion disposed adjacent to the flange; a second end portion that is the other end portion located opposite to the first end portion; Equipped with a movement limiting portion that limits movement of the winding core in the longitudinal direction is provided at the second end portion; When the surface of the winding core facing the movement limiting portion is defined as a winding core-side facing surface, When winding of the printing medium onto the winding core is started with the winding core-side facing surface and the movement limiting portion in contact with each other, the tip surface of the convex portion and the bottom surface of the concave portion do not come into contact with each other while the printing medium is being wound onto the winding core. The winding device according to claim 4.

6. The winding device according to any one of claims 1 to 5; the printing device; have Printing take-up system.

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