Recording device

Abstract

To provide a recording device that can have a driven roller located at a proper position.SOLUTION: A recording device comprises: a recording unit which records on a medium; a discharge roller 37 which rotates to discharge the medium; a first driven roller 41 which is driven as the discharge roller 37 rotates to rotate; a holding part 40 which holds the first driven roller 41; a rotary shaft 44 which rotates the holding part 40; and a control unit which controls the rotation of the rotary shaft 44. The holding part 40 rotates around the rotary shaft 44 to move to a separation position P2 where the first driven roller 41 separates from the discharge roller 37 and a first holding position where the first driven roller 41 holds the medium with the discharge roller 37, and the control unit moves the first driven roller 41 and also stops the holding part 40 at the first holding position so that the direction of reaction force that the first driven roller 41 receives from the discharge roller 37 is opposite from the direction of rotation before stopping.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a recording device such as a printer. [Background technology]

[0002] For example, there is a recording device that prints by ejecting liquid from a recording unit as described in Patent Document 1. The recording device includes a drive roller, which is an example of an ejection roller, a driven roller, and a second rotating shaft, which is an example of a rotating shaft.

[0003] A stacker is removably attached to the recording device. When the stacker is not attached, the driven roller is located at a position separated from the drive roller. When the medium is discharged to the stacker, the driven roller rotates about the second rotation shaft to move to a position where the medium can be sandwiched between the driven roller and the drive roller. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2022-38686 Summary of the Invention [Problem to be solved by the invention]

[0005] When power is transmitted by gears, there is a need for play between the gears, also known as backlash. When the driven roller moves to a position where it pinches the medium between itself and the discharge roller and receives a reaction force from the discharge roller, the position of the driven roller may shift due to the effect of backlash. [Means for solving the problem]

[0006] A recording device that solves the above problem includes a recording unit that records on a medium, an ejection roller that rotates to eject the medium, a driven roller that rotates in response to the rotation of the ejection roller, a holding unit that holds the driven roller, a rotation shaft that rotates the holding unit, and a control unit that controls the rotation of the rotation shaft, wherein the holding unit is capable of moving around the rotation shaft to a separation position where the driven roller is separated from the ejection roller, and a clamping position where the driven roller can clamp the medium between itself and the ejection roller, and the control unit moves the driven roller so that the direction of the reaction force that the driven roller receives from the ejection roller is opposite to the direction in which it was rotating before being stopped, and stops the holding unit at the clamping position. [Brief description of the drawings]

[0007] [Figure 1] FIG. 1 is a schematic diagram of one embodiment of a recording system. [Diagram 2] FIG. 2 is a schematic diagram of the ejection mechanism in which the holding portion is located at the separated position. [Diagram 3] FIG. 3 is a schematic diagram of the ejection mechanism in which the holding portion is located at the second clamping position. [Figure 4] FIG. 4 is a schematic diagram of the ejection mechanism in which the holding portion is located at the restricting position. [Diagram 5] FIG. 5 is a schematic diagram of the ejection mechanism in which the holding portion is located at the separated position. [Figure 6] FIG. 6 is a schematic diagram of the ejection mechanism in which the holding portion is located at the first switching position. [Figure 7] FIG. 7 is a schematic diagram of the ejection mechanism in which the holding portion is located at the second clamping position. [Figure 8] FIG. 8 is a schematic diagram of the ejection mechanism when the holding portion is located at the second switching position. [Figure 9] FIG. 9 is a schematic diagram of the ejection mechanism in which the holding portion is located at the first clamping position. [Figure 10] FIG. 10 is a flowchart showing the initial routine. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] [Embodiment] Hereinafter, an embodiment of a recording device and a recording system including the recording device will be described with reference to the drawings. The recording device is, for example, an inkjet printer that ejects ink, which is an example of a liquid, onto a medium such as paper, fabric, or vinyl to record.

[0009] In the drawings, the recording system 11 is assumed to be placed on a horizontal plane, the direction of gravity is indicated by the Z axis, and directions along the horizontal plane are indicated by the X and Y axes. The X, Y, and Z axes are perpendicular to each other. In the following description, the direction parallel to the X axis is also referred to as the width direction X, and the direction parallel to the Z axis is also referred to as the gravity direction Z.

[0010] <Recording System> As shown in FIG. 1, a recording system 11 includes a medium accommodation device 12 and a recording device 13.

[0011] <Media storage device> The medium storage device 12 is detachably attached to the recording device 13. The medium storage device 12 attached to the recording device 13 is capable of loading the medium 15 discharged from the recording device 13. The medium storage device 12 may have a discharge tray 16, a pressing unit 17, and an arm 18.

[0012] The discharge tray 16 receives the medium 15 discharged from the recording device 13. The recorded medium 15 is stacked on the discharge tray 16. The pressing portion 17 presses the medium 15 loaded on the discharge tray 16 .

[0013] When the medium accommodating device 12 is attached to the recording device 13, the arm 18 may be inserted into the recording device 13 to position the medium accommodating device 12 with respect to the recording device 13. The arm 18 may abut against the recording device 13 when the medium accommodating device 12 is attached to the recording device 13.

[0014] <Recording device> The recording device 13 may include a housing 20, a control unit 21, a feed unit 22, a transport unit 23, a recording unit 24, a support unit 25, a cutting unit 26, and a discharge mechanism 27.

[0015] The housing 20 houses various components of the recording device 13. The housing 20 may have an outlet 29 through which the recorded medium 15 is discharged. The medium storage device 12 may be attached to the outlet 29.

[0016] The control unit 21 comprehensively controls the driving of each mechanism in the recording device 13 and controls various operations executed by the recording device 13 . The control unit 21 may be configured as a circuit including: α: one or more processors that execute various processes according to a computer program; β: one or more dedicated hardware circuits that execute at least some of the various processes; or γ: a combination thereof. The hardware circuit is, for example, an application specific integrated circuit. The processor includes a CPU and memory such as RAM and ROM, and the memory stores program code or instructions configured to cause the CPU to execute processes. The memory, i.e., computer readable medium, includes any readable medium that can be accessed by a general-purpose or dedicated computer.

[0017] The payout unit 22 may include one or more payout spindles 31. The payout spindle 31 rotatably supports a roll body 32. The roll body 32 is a long medium 15 wound and stacked into a cylindrical shape. The payout spindle 31 pays out the medium 15 by rotating the roll body 32. When the payout unit 22 includes multiple payout spindles 31, the payout unit 22 rotates one payout spindle 31 that supports the medium 15 to be paid out.

[0018] 1. Transport unit 23 may transport medium 15 by sandwiching medium 15 between a pair of rotating rollers. Transport unit 23 transports medium 15 in transport direction Dc. Transport direction Dc is a direction along transport path 34.

[0019] The recording unit 24 records on the medium 15. The recording unit 24 may record on the medium 15 by ejecting liquid from a nozzle (not shown). The support section 25 supports the portion of the long medium 15 that is to be recorded on the recording section 24 .

[0020] The cutting unit 26 is provided downstream in the transport direction Dc from the recording unit 24. The cutting unit 26 is capable of cutting the recorded medium 15 across the width direction X. The cutting unit 26 may cut the medium 15 by moving a pair of cutting blades 36 in the width direction X.

[0021] <Ejection mechanism> 2, the discharge mechanism 27 includes a discharge roller 37. The discharge mechanism 27 may include a discharge motor 38 and a discharge shaft 39. The discharge mechanism 27 may include a holder 40, a first driven roller 41 which is an example of a driven roller, a second driven roller 42, a third driven roller 43, and a rotating shaft 44. The discharge mechanism 27 may include a plurality of gears 45, a drive motor 46, a drive sensor 47, a detection flag 48, a detection unit 49, a stopper 50, and a rotating body 51.

[0022] The discharge mechanism 27 may include a plurality of discharge rollers 37. The plurality of discharge rollers 37 are arranged at intervals in the axial direction of a discharge shaft 39. The discharge shaft 39 is provided parallel to the rotation shaft 44. The axial direction of the discharge shaft 39 is the same as the axial direction of the rotation shaft 44. Therefore, in the following description, the axial direction of the discharge shaft 39 and the axial direction of the rotation shaft 44 are simply referred to as the axial direction. In this embodiment, the axial direction is parallel to the width direction X.

[0023] The discharge roller 37 is fixed to the discharge shaft 39 so as to rotate integrally with the discharge shaft 39. The discharge roller 37 rotates about the discharge shaft 39. The discharge roller 37 rotates to discharge the medium 15. The discharge roller 37 rotates in the clockwise direction in FIG. 4 as the discharge motor 38 is driven. The discharge roller 37 may be, for example, a rubber roller that is elastically deformable.

[0024] As shown in FIG. 2, the discharge mechanism 27 may include a plurality of holding parts 40. The plurality of holding parts 40 may be arranged in the axial direction. The discharge mechanism 27 may include a plurality of first driven rollers 41, a plurality of second driven rollers 42, and a plurality of third driven rollers 43. The plurality of first driven rollers 41 may be arranged in the axial direction. The plurality of second driven rollers 42 may be arranged in the axial direction. The plurality of third driven rollers 43 may be arranged in the axial direction.

[0025] The holding unit 40 holds a first driven roller 41. The holding unit 40 may hold a plurality of first driven rollers 41. The holding unit 40 may hold a second driven roller 42 and a third driven roller 43. The holding unit 40 may hold a plurality of third driven rollers 43. The second driven roller 42 may be provided between the plurality of first driven rollers 41 in the axial direction.

[0026] The holding unit 40 is fixed to the rotating shaft 44 so as to rotate integrally with the rotating shaft 44. Rotation refers to rotation about an axis, and the rotatable angle is less than 360 degrees. The holding unit 40 moves the first driven roller 41, the second driven roller 42, and the third driven roller 43 in accordance with the rotation of the rotating shaft 44. The holding unit 40 can move to a plurality of positions including a separation position P2 shown in FIG. 2 and a first clamping position P6 shown in FIG. 3 by rotating around the rotating shaft 44. The first clamping position P6 is an example of a clamping position.

[0027] The rotating shaft 44 can rotate in a first rotation direction R1 shown in Fig. 4 and a second rotation direction R2 shown in Fig. 4 as the driving motor 46 is driven. The driving force of the driving motor 46 is transmitted to the rotating shaft 44 via a plurality of gears 45. The first rotation direction R1 is opposite to the second rotation direction R2. The rotating shaft 44 rotates the holding part 40.

[0028] 2, the drive sensor 47 detects the amount of rotation of the rotary shaft 44 by detecting the amount of drive of the drive motor 46. The drive sensor 47 is, for example, a rotary encoder.

[0029] The detection flag 48 is fixed to the rotating shaft 44 so as to rotate integrally with the rotating shaft 44. The position of the detection flag 48 changes as the rotating shaft 44 rotates. The detection unit 49 may have a light-projecting unit 53 and a light-receiving unit 54. The light-projecting unit 53 projects light. The light-receiving unit 54 receives the light projected by the light-projecting unit 53. The detection unit 49 of this embodiment is a photoelectric sensor. The light-projecting unit 53 and the light-receiving unit 54 may be provided on both sides of the detection flag 48 so as to sandwich the detection flag 48 in the axial direction. The detection unit 49 detects the detection flag 48. The detection unit 49 of this embodiment detects the displacement of the detection flag 48 depending on whether the optical axis 55 is blocked or not. In the following description, a state in which the optical axis 55 is blocked is also referred to as a light-blocking state, and a state in which the optical axis 55 is not blocked is also referred to as a light-receiving state.

[0030] The first driven roller 41, the second driven roller 42, and the third driven roller 43 are rotatably provided with respect to the holding unit 40. The first driven roller 41, the third driven roller 43, and the discharge roller 37 are provided so as to be aligned in the axial direction. The first driven roller 41 can come into contact with the discharge roller 37. The third driven roller 43 can come into contact with the discharge roller 37. The first driven roller 41 and the third driven roller 43 rotate following the rotation of the discharge roller 37.

[0031] When the medium 15 is sandwiched between the first driven roller 41 and the discharge roller 37, the first driven roller 41 and the third driven roller 43 rotate in accordance with the medium 15 being discharged. The second driven roller 42 rotates in accordance with the medium 15 being discharged. The first driven roller 41, the second driven roller 42, and the third driven roller 43 may be toothed rollers. Using toothed rollers for the rollers that come into contact with the recorded surface of the medium 15 can prevent deterioration in recording quality.

[0032] 3, the second driven roller 42 is provided at a position farther from the rotation shaft 44 than the first driven roller 41. The second driven roller 42 presses the medium 15 sandwiched between the first driven roller 41 and the discharge roller 37, thereby making the medium 15 wavy.

[0033] 4, the second distance L2 is longer than the first distance L1. The third distance L3 is shorter than the first distance L1. The first distance L1, the second distance L2, and the third distance L3 are radial distances centered around the rotation axis 44.

[0034] The first distance L1 is the distance from a first contact position where the first driven roller 41 can contact the medium 15 to the rotation shaft 44. The second distance L2 is the distance from a second contact position where the second driven roller 42 can contact the medium 15 to the rotation shaft 44. The third distance L3 is the distance from a third contact position where the third driven roller 43 can contact the medium 15 to the rotation shaft 44.

[0035] The stopper 50 limits the rotation of the rotating body 51. The stopper 50 limits the rotation of the rotating shaft 44 by limiting the rotation of the rotating body 51. The rotating body 51 is fixed to the rotating shaft 44 so as to rotate integrally with the rotating shaft 44. The rotating body 51 has a limiting portion 57. When the limiting portion 57 hits the stopper 50, the rotation of the rotating body 51 in the second rotation direction R2 is limited.

[0036] <Position of holding part> As shown in Figures 4 to 9, the holding portion 40 can be moved to a limiting position P1, a separating position P2, a first switching position P3, a second clamping position P4, a second switching position P5, and a first clamping position P6 by rotating around a rotating shaft 44.

[0037] 4, the limiting position P1 is a position where the limiting portion 57 abuts against the stopper 50. When the holding portion 40 is in the limiting position P1, the holding portion 40 is allowed to rotate in a first rotational direction R1, but is restricted from rotating in a second rotational direction R2. When the holding portion 40 is in the limiting position P1, the detection portion 49 is in a light receiving state.

[0038] 5, the separated position P2 is a position rotated by a first angle in a first rotation direction R1 from the limiting position P1.

[0039] 6, the first switching position P3 is a position rotated from the separated position P2 by a second angle in the first rotation direction R1. The first switching position P3 is a position where the detection unit 49 switches between a light receiving state and a light blocking state. For example, when the holding unit 40 moving in the first rotation direction R1 passes through the first switching position P3, the detection unit 49 switches from the light receiving state to the light blocking state.

[0040] 7, the second clamping position P4 is a position rotated a third angle in the first rotation direction R1 from the separated position P2. The third angle is greater than the second angle. The second clamping position P4 is a position where the third driven roller 43 can clamp the medium 15 between itself and the discharge roller 37. The third driven roller 43 located at the second clamping position P4 clamps the medium 15 between itself and the discharge roller 37 and discharges it.

[0041] The third driven roller 43 located at the second clamping position P4 receives a reaction force from the discharge roller 37. The reaction force received by the third driven roller 43 is smaller than the reaction force received by the first driven roller 41 located at the first clamping position P6 from the discharge roller 37. The center of gravity 59 of the holding part 40 located at the second clamping position P4 is located on the same side of the straight line L in the gravity direction Z that passes through the rotation center of the rotation shaft 44 as the center of gravity 59 of the holding part 40 located at the separated position P2.

[0042] 8, the second switching position P5 is a position rotated from the separated position P2 in the first rotation direction R1 by a fourth angle. The fourth angle is greater than the third angle. The second switching position P5 is a position where the detection unit 49 switches between a light receiving state and a light blocking state. For example, when the holding unit 40 moving in the first rotation direction R1 passes through the second switching position P5, the detection unit 49 switches from the light blocking state to the light receiving state.

[0043] As shown in FIG. 9, the first clamping position P6 is a position rotated from the separated position P2 in the first rotation direction R1 by a fifth angle. The fifth angle is greater than the fourth angle. The first clamping position P6 is a position where the first driven roller 41 can clamp the medium 15 between itself and the discharge roller 37. The first driven roller 41 located at the first clamping position P6 clamps the medium 15 between itself and the discharge roller 37 and discharges it. The first driven roller 41 located at the first clamping position P6 clamps the medium 15 with a force greater than that of the third driven roller 43 located at the second clamping position P4. The center of gravity 59 of the holding unit 40 located at the first clamping position P6 is located on the opposite side of the straight line L to the center of gravity 59 of the holding unit 40 located at the separated position P2.

[0044] The first distance L1 is longer than the distance from the rotation shaft 44 to the discharge roller 37. Therefore, the first driven roller 41 located at the first clamping position P6 deforms the discharge roller 37 and receives a reaction force from the discharge roller 37.

[0045] <Initial routine> Next, the initial operation will be described with reference to the flow chart shown in Fig. 10. The control unit 21 may execute the initial routine shown in Fig. 10 when the power of the recording device 13 is turned on.

[0046] 10, in step S101, the control unit 21 determines whether the detection unit 49 is in a light-blocking state. For example, when the holding unit 40 is located at the second clamping position P4 in the initial state, the detection unit 49 is in a light-blocking state. When the detection unit 49 is in a light-blocking state, step S101 becomes YES, and the control unit 21 transitions the process to step S102. In step S102, the control unit 21 rotates the holding unit 40 in the second rotation direction R2.

[0047] In step S103, the control unit 21 determines whether the detection unit 49 has switched to a light receiving state. If the detection unit 49 is in a light blocking state, step S103 becomes NO, and the control unit 21 maintains the state in which the holding unit 40 is rotated in the second rotation direction R2. If the detection unit 49 is in a light receiving state, step S103 becomes YES, and the control unit 21 proceeds to step S104.

[0048] In step S104, the control unit 21 rotates the holding unit 40 by the second angle in the second rotation direction R2. In step S105, the control unit 21 stops the rotation of the holding unit 40 and ends the initial routine. That is, when the holding unit 40, which rotates in the second rotation direction R2, is located at the first switching position P3, the state is switched from the light blocking state to the light receiving state. The control unit 21 rotates the holding unit 40 by the second angle in the second rotation direction R2 from the first switching position P3, thereby positioning the holding unit 40 at the separated position P2.

[0049] For example, when the holding unit 40 is initially located at the first clamping position P6 or the separated position P2, the detection unit 49 is in a light receiving state. In step S101, if the detection unit 49 is in a light receiving state, step S101 becomes NO, and the control unit 21 proceeds to step S106. In step S106, the control unit 21 rotates the holding unit 40 in the second rotation direction R2.

[0050] In step S107, the control unit 21 determines whether the holding unit 40 has moved to the limit position P1. For example, the control unit 21 may determine that the holding unit 40 has moved to the limit position P1 when the load on the drive motor 46 exceeds a threshold value. If the holding unit 40 has moved to the limit position P1, step S107 becomes YES, and the control unit 21 shifts the process to step S110. If the holding unit 40 has not moved to the limit position P1, step S107 becomes NO, and the control unit 21 shifts the process to step S108.

[0051] In step S108, the control unit 21 determines whether the detection unit 49 remains in the light receiving state. If the detection unit 49 has switched to the light blocking state, step S108 becomes NO, and the control unit 21 moves the process to step S103. For example, if the holding unit 40 is in the first clamping position P6 in the initial state, when the holding unit 40 is rotated in the second rotation direction R2, the detection unit 49 switches from the light receiving state to the light blocking state at the timing when the holding unit 40 moves to the second switching position P5. Therefore, when the process moves to step S103 at the timing when the detection unit 49 switches to the light blocking state, and steps S103 to S105 are executed, the holding unit 40 moves to the separated position P2.

[0052] In step S108, if the detection unit 49 remains in the light receiving state, step S108 becomes YES, and the control unit 21 proceeds to step S109. In step S109, the control unit 21 determines whether the angle at which the holding unit 40 is rotated in the second rotation direction R2 has reached a predetermined angle based on the detection of the drive sensor 47. The predetermined angle is an angle larger than the difference between the fourth angle and the fifth angle. The predetermined angle may be an angle smaller than the first angle.

[0053] If the angle by which the holding unit 40 is rotated is smaller than the predetermined angle, step S109 becomes NO, and the control unit 21 shifts the process to step S107. If the angle by which the holding unit 40 is rotated becomes the predetermined angle, step S109 becomes YES, and the control unit 21 shifts the process to step S110.

[0054] In step S110, the control unit 21 stops the rotation of the holding unit 40. In step S111, the control unit 21 rotates the holding unit 40 in the first rotation direction R1. In step S112, the control unit 21 determines whether the detection unit 49 has switched to a light-blocking state. If the detection unit 49 is in a light-receiving state, step S112 becomes NO, and the control unit 21 maintains the state in which the holding unit 40 is rotated in the first rotation direction R1. If the detection unit 49 is in a light-blocking state, step S112 becomes YES, and the control unit 21 proceeds to step S113.

[0055] In step S113, the control unit 21 stops the rotation of the holding unit 40. The control unit 21 transitions the process to step S102. When the light receiving state is switched to the light blocking state while the holding unit 40 is rotated in the first rotation direction R1, the holding unit 40 is located at the first switching position P3. Therefore, the holding unit 40 that has stopped rotating stops between the first switching position P3 and the second clamping position P4. Therefore, transitioning to step S102 and executing steps S102 to S105, the holding unit 40 moves to the separated position P2.

[0056] <Operation when in use> 5, the control unit 21 may position the holding unit 40 at the separated position P2 when the medium storage device 12 is not attached. The control unit 21 may position the holding unit 40 at the separated position P2 when cutting of the medium 15 is not performed. The discharge mechanism 27 may discharge the uncut long medium 15 by the discharge rollers 37.

[0057] 7 and 9, when medium accommodation device 12 is attached to recording device 13, control unit 21 may move holding unit 40 to first clamping position P6 or second clamping position P4. When cutting unit 26 cuts medium 15, holding unit 40 may be located at first clamping position P6 or second clamping position P4.

[0058] The control unit 21 may select between the first clamping position P6 and the second clamping position P4 depending on the type of medium 15. For example, the control unit 21 may select the first clamping position P6 when the medium 15 is soft, and may select the second clamping position P4 when the medium 15 is soft. When moving the holding unit 40 to the first clamping position P6 or the second clamping position P4, the control unit 21 rotates the holding unit 40, which is located at the separation position P2, in the first rotation direction R1.

[0059] The control unit 21 controls the rotation of the rotating shaft 44. The control unit 21 may control the rotation of the rotating shaft 44 based on the detection result of the detection unit 49. The control unit 21 may control the rotation of the rotating shaft 44 starting from the switching of the detection unit 49 between the light receiving state and the light blocking state due to the passage of the detection flag 48.

[0060] Specifically, after the detection unit 49 switches from the light receiving state to the light blocking state, the control unit 21 rotates the holding unit 40 by the difference between the second angle and the third angle, thereby positioning the holding unit 40 at the second clamping position P4. After the detection unit 49 switches from the light blocking state to the light receiving state, the control unit 21 rotates the holding unit 40 by the difference between the fourth angle and the fifth angle, thereby positioning the holding unit 40 at the first clamping position P6.

[0061] The difference between the fourth angle and the fifth angle may be smaller than the difference between the second angle and the third angle. That is, the angle of rotation from the second switching position P5 to the first clamping position P6 is smaller than the angle of rotation from the first switching position P3 to the second clamping position P4.

[0062] <Operation of the embodiment> The operation of this embodiment will be described. 8, when the first driven roller 41 rotates together with the holding portion 40 in the first rotation direction R1 and moves to the second switching position P5, the first driven roller 41 comes into contact with the discharge roller 37 and pushes the discharge roller 37 in the first rotation direction R1. Therefore, the first driven roller 41 receives a reaction force from the discharge roller 37.

[0063] When the first driven roller 41 presses the discharge roller 37 in the first rotation direction R1, the direction of the reaction force received from the discharge roller 37 is a second rotation direction R2 opposite to the first rotation direction R1 in which the first driven roller 41 moves. When the first driven roller 41 receives the reaction force, the multiple gears 45 are in a state where the backlash is filled. The reaction force received from the discharge roller 37 gradually increases while moving from the second switching position P5 to the first clamping position P6. The holding unit 40 stops in a state where the first driven roller 41 receives the reaction force from the discharge roller 37. The reaction force that cannot be absorbed by the backlash is absorbed by the discharge roller 37 being deformed or the discharge shaft 39 or the rotating shaft 44 being bent.

[0064] When the holding part 40 is rotated in the first rotation direction R1 via the multiple gears 45, the holding part 40 is difficult to return in the second rotation direction R2 in which the backlash of the multiple gears 45 is filled, but the holding part 40 is easy to move in the first rotation direction R1 in which the backlash of the multiple gears 45 is not filled. In this embodiment, when the medium 15 is discharged from the recording device 13, the holding part 40 receives a resistance force that rotates in the second rotation direction R2 due to the medium 15 that is clamped. Therefore, when the medium 15 is clamped, the holding part 40 is difficult to move in the first rotation direction R1. Therefore, by rotating the holding part 40 in the first rotation direction R1 and stopping the holding part 40 at the first clamping position P6, the holding part 40 can be made difficult to shift from the stop position. The fact that the holding part 40 is difficult to shift is also the same at the second clamping position P4 as described above.

[0065] 9, the control unit 21 stops the holding unit 40, which has been rotated in the first rotation direction R1, at the first clamping position P6. The control unit 21 moves the first driven roller 41 so that the direction of the reaction force that the first driven roller 41 receives from the discharge roller 37 is opposite to the first rotation direction R1 in which the first driven roller 41 rotated before being stopped, and stops the holding unit 40 at the first clamping position P6. The first driven roller 41 starts to receive the reaction force from the discharge roller 37 before reaching the first clamping position P6, and stops while receiving the reaction force.

[0066] <Effects of the embodiment> The effects of this embodiment will be described. (1-1) The first rotation direction R1 in which the first driven roller 41 moved before stopping at the first clamping position P6 is the direction opposite to the direction of the reaction force that the first driven roller 41 receives from the discharge roller 37. Therefore, the first driven roller 41 stops in a state where the backlash is reduced due to the reaction force that the first driven roller 41 receives from the discharge roller 37. Therefore, the first driven roller 41 can be positioned at an appropriate position.

[0067] (1-2) The second driven roller 42 is located between the first driven rollers 41 in the axial direction, and can contact the medium 15 at a position farther from the rotation axis 44 than the first driven roller 41. Therefore, the medium 15 sandwiched between the first driven roller 41 and the discharge roller 37 is held in a wavy shape by being pressed by the second driven roller 42. This reduces the risk of the discharged medium 15 sagging due to, for example, its own weight.

[0068] (1-3) The holding unit 40 holds the first driven roller 41 and the third driven roller 43. When the first driven roller 41 and the third driven roller 43 are positioned so as to be able to sandwich the medium 15 between themselves and the discharge roller 37, the first driven roller 41 and the third driven roller 43 receive different amounts of reaction force from the discharge roller 37. In other words, the first driven roller 41 and the third driven roller 43 have different amounts of force with which to sandwich the medium 15 between themselves and the discharge roller 37. Therefore, by selecting and using the first driven roller 41 and the third driven roller 43 depending on, for example, the type of the medium 15, the medium 15 can be appropriately discharged.

[0069] (1-4) The detection unit 49 detects the detection flag 48. The position of the detection flag 48 changes with the rotation of the rotation shaft 44. Therefore, by using the detection result of the detection unit 49, the rotation of the rotation shaft 44 can be easily controlled.

[0070] (1-5) The detection flag 48 blocks light when it passes through the detection unit 49. The control unit 21 controls the rotation of the rotation shaft 44 when the detection unit 49 switches between a light receiving state and a light blocking state. Therefore, the rotation of the rotation shaft 44 can be easily controlled.

[0071] (1-6) The angle from the second switching position P5, where the light receiving state and the light blocking state are switched, to the first clamping position P6 is smaller than the angle from the first switching position P3, where the light receiving state and the light blocking state are switched, to the second clamping position P4. Therefore, compared to the accuracy of stopping the holding unit 40 at the second clamping position P4, it is possible to stop the holding unit 40 at the first clamping position P6 with higher accuracy.

[0072] (1-7) The center of gravity 59 of the holding unit 40 at the separating position P2 and the first clamping position P6 is located on the opposite side of a straight line L in the gravity direction Z that passes through the rotation center of the rotation shaft 44. That is, the direction in which the holding unit 40 located at the first clamping position P6 rotates due to its own weight is opposite to the direction in which the holding unit 40 moves from the separating position P2 to the first clamping position P6. Therefore, the direction of the reaction force that the first driven roller 41 moving from the separating position P2 to the first clamping position P6 receives from the discharge roller 37 is aligned with the direction in which the holding unit 40 moved to the first clamping position P6 tries to rotate due to its own weight, making it easier to position the first driven roller 41 at an appropriate position.

[0073] (1-8) The center of gravity 59 of the holding unit 40 at the separation position P2 and the second clamping position P4 is located on the same side of a straight line L in the gravity direction Z that passes through the rotation center of the rotation shaft 44. Therefore, the holding unit 40 located at the separation position P2 can be easily moved to the second clamping position P4 by rotating the holding unit 40 in a direction in which it is easy to rotate under its own weight.

[0074] [Example of change] This embodiment can be modified as follows: This embodiment and the following modifications can be combined with each other to the extent that there is no technical contradiction.

[0075] The control unit 21 may move the holding unit 40 to the separated position P2 when the medium accommodation device 12 is removed from the recording device 13. The control unit 21 may move the holding unit 40 to the separated position P2 when instructed by a user.

[0076] The center of gravity 59 of the holding portion 40 may be located on a line connecting the rotation center of the rotating shaft 44 and the rotation center of the first driven roller 41 . The center of gravity 59 of the holding portion 40 located at the second clamping position P4 may be located on the straight line L.

[0077] The center of gravity 59 of the holding portion 40 located at the second clamping position P4 may be located on the opposite side of the straight line L to the center of gravity 59 of the holding portion 40 located at the separated position P2. The center of gravity 59 of the holding portion 40 located at the first clamping position P6 may be located on the straight line L.

[0078] The center of gravity 59 of the holding portion 40 located at the first clamping position P6 may be located on the same side of the straight line L as the center of gravity 59 of the holding portion 40 located at the separated position P2. When moving the holding portion 40 to the first clamping position P6, the control portion 21 may rotate the holding portion 40 from the first switching position P3 in the first rotation direction R1 by the difference between the second angle and the fifth angle.

[0079] The detection unit 49 may be a contact sensor. The detection unit 49 may detect a contact of the detection flag 48 or may detect a contact of the holder 40, for example. The control unit 21 may position the holding unit 40 at the second clamping position P4 by rotating the holding unit 40, which is positioned at the separated position P2, in the first rotation direction R1 by a third angle.

[0080] The control unit 21 may position the holding unit 40 at the first clamping position P6 by rotating the holding unit 40, which is positioned at the separated position P2, by a fifth angle in the first rotation direction R1. The discharge mechanism 27 may be configured without at least one of the second driven roller 42 and the third driven roller 43.

[0081] The ejection mechanism 27 may include a first driven roller 41 extending in the axial direction. The ejection mechanism 27 may comprise one ejection roller 37 extending axially. The ejection roller 37 may be provided so as to sandwich the medium 15 between itself and the second driven roller 42 .

[0082] The second distance L2 may be the same length as the first distance L1. The second distance L2 may be shorter than the first distance L1. The recording device 13 is not limited to an inkjet printer, but may be a laser printer, a thermal printer, a dot matrix printer, a digital printing machine, or the like.

[0083] The recording device 13 may be a liquid ejection device that performs recording by ejecting or discharging a liquid other than ink. The state of the liquid ejected from the liquid ejection device as minute droplets includes granular, teardrop, and thread-like tails. The liquid here may be any material that can be ejected from the liquid ejection device. For example, the liquid may be any state in which the substance is in a liquid phase, and includes fluids such as high or low viscosity liquids, sols, gel water, other inorganic solvents, organic solvents, solutions, liquid resins, liquid metals, and metal melts. The liquid includes not only liquids as one state of matter, but also particles of functional materials made of solids such as pigments and metal particles dissolved, dispersed, or mixed in a solvent. Representative examples of liquids include inks and liquid crystals as described in the above embodiment. Here, the ink includes various liquid compositions such as general water-based inks and oil-based inks, as well as gel inks and hot melt inks. Specific examples of the liquid ejection device include a device that ejects a liquid containing materials such as electrode materials and color materials in a dispersed or dissolved form, which are used in the manufacture of liquid crystal displays, electroluminescence displays, surface-emitting displays, and color filters. The liquid ejection device may be a device that ejects biological organic matter used in the manufacture of biochips, a device that ejects liquid as a sample used as a precision pipette, a textile printing device, a microdispenser, or the like. The liquid ejection device may be a device that ejects lubricating oil at a pinpoint onto precision machinery such as a watch or camera, or a device that ejects transparent resin liquid such as ultraviolet curing resin onto a substrate to form a micro hemispherical lens, optical lens, or the like used in optical communication elements. The liquid ejection device may be a device that ejects an etching liquid such as an acid or alkali to etch a substrate or the like.

[0084] [Definition] The term "at least one" as used herein means "one or more" of the desired options. As an example, the term "at least one" as used herein means "only one option" or "both of two options" if the number of options is two. As another example, the term "at least one" as used herein means "only one option", "any combination of two options", or "any combination of three or more options" if the number of options is three or more.

[0085] [Note] The technical ideas and effects obtained from the above-described embodiment and modified examples will be described below.

[0086] (A) A recording device includes a recording unit that records on a medium, an ejection roller that rotates to eject the medium, a driven roller that rotates in response to the rotation of the ejection roller, a holding unit that holds the driven roller, a rotation shaft that rotates the holding unit, and a control unit that controls the rotation of the rotation shaft, wherein the holding unit rotates around the rotation shaft to move to a separation position where the driven roller is separated from the ejection roller and a clamping position where the driven roller can clamp the medium between itself and the ejection roller, and the control unit moves the driven roller so that the direction of the reaction force that the driven roller receives from the ejection roller is opposite to the direction in which it was rotating before being stopped, and stops the holding unit at the clamping position.

[0087] According to this configuration, the direction in which the driven roller moves before stopping at the clamping position is the opposite direction to the direction of the reaction force that the driven roller receives from the discharge roller. Therefore, the driven roller stops in a state where the backlash is filled due to the reaction force that the driven roller receives from the discharge roller. Therefore, the driven roller can be positioned at an appropriate position.

[0088] (B) The recording device described in (A) may comprise a plurality of first driven rollers aligned in an axial direction when the driven roller is a first driven roller, and a second driven roller held in the holding section, and the second driven roller is provided between the plurality of first driven rollers in the axial direction, and a second distance from a second contact position at which the second driven roller can contact the medium to the pivot axis may be longer than a first distance from a first contact position at which the first driven roller can contact the medium to the pivot axis.

[0089] According to this configuration, the second driven roller is located between the first driven rollers in the axial direction and can contact the medium at a position farther from the rotation axis than the first driven roller. Therefore, the medium sandwiched between the first driven roller and the discharge roller is held in a wavy shape by being pressed by the second driven roller. This reduces the risk of the discharged medium sagging due to, for example, its own weight.

[0090] (C) In the recording device described in (A) or (B), when the driven roller is a first driven roller and the clamping position is a first clamping position, the recording device further includes a third driven roller held by the holding section, the holding section being capable of rotating around the rotation axis to move to a second clamping position where the third driven roller can clamp the medium between itself and the discharge roller, and the reaction force received by the third driven roller at the second clamping position from the discharge roller may be smaller than the reaction force received by the first driven roller at the first clamping position from the discharge roller.

[0091] According to this configuration, the holding section holds the first driven roller and the third driven roller. When the first driven roller and the third driven roller are positioned so as to be able to hold the medium between them and the discharge roller, the magnitude of the reaction force they receive from the discharge roller differs. In other words, the first driven roller and the third driven roller have a different magnitude of force with which they hold the medium between them and the discharge roller. Therefore, by selecting and using the first driven roller and the third driven roller according to, for example, the type of medium, the medium can be appropriately discharged.

[0092] (D) The recording device described in (A) to (C) may include a detection flag whose position changes as the rotation of the rotation axis occurs, and a detection unit that detects the detection flag, and the control unit may control the rotation of the rotation axis based on the detection result of the detection unit.

[0093] According to this configuration, the detection unit detects the detection flag. The position of the detection flag changes with the rotation of the rotary shaft. Therefore, by using the detection result of the detection unit, the rotation of the rotary shaft can be easily controlled.

[0094] In the recording device described in (E) and (D), the detection unit has a light-projecting unit that projects light and a light-receiving unit that receives the light projected by the light-projecting unit, and the control unit may control the rotation of the pivot axis based on the switching of the detection unit between a light-receiving state and a light-blocking state due to the passage of the detection flag.

[0095] According to this configuration, the detection flag blocks light when passing through the detection unit. The control unit controls the rotation of the rotation shaft when the detection unit switches between a light receiving state and a light blocking state. Therefore, the rotation of the rotation shaft can be easily controlled.

[0096] In the recording device described in (F) and (E), the angle of rotation from the position where the light receiving state and the light blocking state switch to the first clamping position may be smaller than the angle of rotation from the position where the light receiving state and the light blocking state switch to the second clamping position.

[0097] According to this configuration, the angle from the position where the light receiving state and the light blocking state are switched to the first clamping position is smaller than the angle from the position where the light receiving state and the light blocking state are switched to the second clamping position, so the holding unit can be stopped at the first clamping position with higher accuracy than the accuracy of stopping the holding unit at the second clamping position.

[0098] (G) In the recording device described in (A) to (F), the center of gravity of the holding part located at the clamping position may be located on the opposite side of the center of gravity of the holding part located at the separated position with respect to a line in the gravity direction passing through the rotation center of the rotation shaft.

[0099] According to this configuration, the centers of gravity of the holding parts at the separation position and the clamping position are located on opposite sides of a line in the direction of gravity that passes through the rotation center of the rotation shaft. In other words, the direction in which the holding parts at the clamping position rotate due to their own weight is opposite to the direction in which the holding parts move from the separation position to the clamping position. Therefore, the direction of the reaction force that the driven roller that moves from the separation position to the clamping position receives from the discharge roller is aligned with the direction in which the holding parts that have moved to the clamping position try to rotate due to their own weight, making it easier to position the driven roller at an appropriate position.

[0100] (H) In the recording device described in (A) to (G), the center of gravity of the holding part located at the second clamping position may be located on the same side of a line in the direction of gravity that passes through the rotation center of the rotation shaft as the center of gravity of the holding part located at the separated position.

[0101] According to this configuration, the center of gravity of the holding part in the separated position and the second clamping position is located on the same side of a line in the direction of gravity that passes through the rotation center of the rotation shaft. Therefore, the holding part located in the separated position can be easily moved to the second clamping position by rotating it in a direction that makes it easier to rotate under its own weight. [Explanation of symbols]

[0102] 11...recording system, 12...medium storage device, 13...recording device, 15...medium, 16...discharge tray, 17...holding section, 18...arm, 20...casing, 21...control section, 22...feeding section, 23...transport section, 24...recording section, 25...support section, 26...cutting section, 27...discharge mechanism, 29...discharge outlet, 31...feeding shaft, 32...roll body, 34...transport path, 36...cutting blade, 37...discharge roller, 38...discharge motor, 39...discharge shaft, 40...holding section, 41...first driven roller, 42...second driven roller, 43...third driven roller, 44...first driven roller, 45...second driven roller, 46...second driven roller, 47...second driven roller, 48...second driven roller, 49...second driven roller, 50...second driven roller, 51...first driven roller, 52...second driven roller, 53...third driven roller, 54...second driven roller, 55...second driven roller, 56...second driven roller, 57...second driven roller, 58...second driven roller, 59...second driven roller, 60...second driven roller, 61...second driven roller, 62...second driven roller, 63...second driven roller, 64...second driven roller, 65...second driven roller, 66...second driven roller, 67...second driven roller, 68...second driven roller, 69...second driven roller, 70...second driven roller, 71...second driven roller, 72...second driven roller, 73...second driven roller, 74...second driven roller, 75...second driven roller, 76...second driven roller, 77...second driven roller, 78...second driven roller, 79...second driven roller, 80...second driven roller, 81 4...rotating shaft, 45...gear, 46...driving motor, 47...driving sensor, 48...detection flag, 49...detection section, 50...stopper, 51...rotating body, 53...light-emitting section, 54...light-receiving section, 55...optical axis, 57...limiting section, 59...center of gravity, Dc...conveying direction, L...straight line, L1...first distance, L2...second distance, L3...third distance, P1...limiting position, P2...separating position, P3...first switching position, P4...second clamping position, P5...second switching position, P6...first clamping position, R1...first rotation direction, R2...second rotation direction, X...width direction, Z...gravity direction.

Claims

1. a recording unit for recording on a medium; an ejection roller that rotates to eject the medium; a driven roller that rotates in response to rotation of the discharge roller; A holding portion that holds the driven roller; A rotation shaft for rotating the holding portion; A control unit that controls the rotation of the rotation shaft; Equipped with the holding portion is movable, by rotating around the rotation axis, between a separation position where the driven roller is separated from the discharge roller and a clamping position where the driven roller can clamp the medium between itself and the discharge roller; The control unit moves the driven roller so that the direction of the reaction force that the driven roller receives from the discharge roller is opposite to the direction in which the driven roller was rotating before being stopped, and stops the holding unit at the clamping position.

2. When the driven roller is a first driven roller, A plurality of the first driven rollers arranged in an axial direction; A second driven roller held by the holding portion; Equipped with The second driven roller is provided between the first driven rollers in the axial direction, 2. The recording device according to claim 1, wherein a second distance from a second contact position at which the second driven roller can contact the medium to the pivot shaft is longer than a first distance from a first contact position at which the first driven roller can contact the medium to the pivot shaft.

3. When the driven roller is a first driven roller and the clamping position is a first clamping position, A third driven roller is further provided which is held by the holding portion, the holding portion is movable to a second clamping position where the third driven roller can clamp the medium between the holding portion and the discharge roller by rotating around the rotation shaft; 2. The recording device according to claim 1, wherein the reaction force received by the third driven roller located at the second clamping position from the discharge roller is smaller than the reaction force received by the first driven roller located at the first clamping position from the discharge roller.

4. a detection flag whose position changes with rotation of the rotary shaft; A detection unit that detects the detection flag; Equipped with 4. The recording apparatus according to claim 3, wherein the control unit controls the rotation of the rotation shaft based on a detection result of the detection unit.

5. The detection unit is a light-projecting unit that projects light; a light receiving unit that receives the light projected by the light projecting unit; having 5. The recording apparatus according to claim 4, wherein the control unit controls the rotation of the rotation shaft when the detection unit switches between a light receiving state and a light blocking state due to the passage of the detection flag.

6. 6. The recording device according to claim 5, wherein an angle of rotation from the position where the light receiving state and the light blocking state are switched to the first clamping position is smaller than an angle of rotation from the position where the light receiving state and the light blocking state are switched to the second clamping position.

7. 2. The recording device according to claim 1, wherein the center of gravity of the holding portion located at the clamping position is located on the opposite side of the line in the direction of gravity passing through the center of rotation of the rotation shaft from the center of gravity of the holding portion located at the separated position.

8. 4. A recording device according to claim 3, wherein the center of gravity of the holding portion located at the second clamping position is located on the same side as the center of gravity of the holding portion located at the separated position with respect to a line in the direction of gravity passing through the rotation center of the rotation shaft.

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