JP5565208B2 - Medium discharging apparatus and recording apparatus - Google Patents

Description

  The present invention relates to a medium discharging apparatus that discharges a medium such as paper from an apparatus such as a recording apparatus, and a recording apparatus including the medium discharging apparatus.

  2. Description of the Related Art Conventionally, there is a paper discharge device (medium discharge device) that includes a plurality of arms (discharge auxiliary members) that protrude outward from the outer peripheral surface of a discharge roller and discharges (discharges) paper (medium) from within the apparatus. (For example, patent document 1). This arm is made of a resilient material and rotates with the discharge roller. When the arm contacts the paper during rotation, the paper is repelled toward the downstream side in the transport direction.

Japanese Patent Laid-Open No. 4-246054

  By the way, since the paper discharge device of Patent Document 1 always rotates with the discharge roller, the guide auxiliary member that covers the upper part of the arm up to the vicinity of the contact position between the discharge roller and the driven roller to prevent the paper and the arm from contacting each other. I was prepared. Therefore, the arm and the guide auxiliary member repeatedly come into contact with each other, and there is a problem that the elastic arm is worn.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a medium discharge device capable of suppressing unnecessary contact of the discharge auxiliary member with respect to the medium and peripheral devices, and a recording including the medium discharge device. To provide an apparatus.

In order to achieve the above object, the medium discharging apparatus of the present invention is provided at a holding position for holding the medium between the driving roller disposed in the medium conveyance path and the driving roller when the medium is conveyed. And a driven roller that moves to a standby position that is separated from the conveyance path when the conveyance of the medium is completed, and projects into the conveyance path when the driven roller moves from the clamping position to the standby position. A discharge assisting member that has a protrusion, the protrusion being in contact with a rear end of the medium on the transport path, and discharging the medium to the outside of the transport path; a cam shaft; and the cam shaft And a gear mechanism for transmitting the rotation of the cam shaft to the discharge assisting member, and the driven roller is accompanied by the rotation of the cam member. Moving Te.

According to this configuration, the protruding portion of the discharge assisting member protrudes to the conveyance path when the driven roller moves from the holding position to the standby position, so that the medium that has been released from being nipped by the driven roller and the driving roller is transferred to the conveyance path. If it remains, it can come into contact with the trailing edge of the medium and be discharged outside the transport path. Therefore, the discharge assisting member does not contact the medium when the driven roller holds the medium, and there is no need to provide a member for preventing contact between the medium and the discharge assisting member. Unnecessary contact of the discharge assisting member with respect to can be suppressed.
According to this configuration, the protrusion of the discharge assisting member can be moved together with the driven roller by rotating the cam shaft. Therefore, it is not necessary to provide a dedicated drive source for displacing the protrusion.

  In the medium discharge device of the present invention, one protrusion is provided on the outer peripheral side of the discharge auxiliary member, and is separated from the transport path when the driven roller moves from the standby position to the clamping position. It moves from the downstream side to the upstream side in the conveyance direction of the medium through the movement path.

  According to this configuration, since only one protrusion is provided on the outer peripheral side of the discharge assisting member, when the driven roller moves from the standby position to the clamping position, it moves through a movement path that is separated from the medium conveyance path. Thus, it is possible to return to the position before discharging the medium while avoiding unnecessary contact with the medium.

  In the medium discharging apparatus of the present invention, the driven roller is movable between the standby position spaced upward from the driving roller and the clamping position that is upstream of the standby position in the medium transport direction. And curling the medium by bending the medium at the clamping position.

  According to this configuration, the medium tends to remain on the conveyance path when the medium is sandwiched between the driving roller and the driven roller, so that the tip side is directed upward when the medium is sandwiched between the driving roller and the driven roller. However, when the protrusion of the discharge assisting member comes into contact with the rear end of the medium, the medium can be reliably discharged.

  In order to achieve the above object, a recording apparatus of the present invention includes a main body case, recording means arranged in the main body case for recording on the medium, and discharging the medium to the outside of the main body case. A medium discharge device.

  According to this configuration, it is possible to obtain the same effect as that of the medium discharge device.

FIG. 3 is a cross-sectional view illustrating a schematic configuration of a printer including a transport device that functions as a medium discharge device. The side view which shows the curl correction mechanism when not performing the curl correction operation. The side view which shows the curl correction mechanism when performing the curl correction operation. The top view which shows the curl correction mechanism when not performing the curl correction operation. The top view which shows the curl correction mechanism when performing the curl correction operation. The perspective view for demonstrating a discharge auxiliary member. FIG. 2 is a block diagram illustrating an electrical configuration of the printer according to the embodiment. The flowchart explaining a curl correction process routine. The side view explaining the effect | action of a discharge auxiliary member.

Hereinafter, an embodiment in which the present invention is embodied in an ink jet printer (hereinafter sometimes abbreviated as “printer”) which is a kind of recording apparatus will be described.
As shown in FIG. 1, the printer 11 includes a main body case 12 having a paper discharge unit 12a, a holding unit 13 that holds a sheet ST, which is a long sheet, in a roll body RS in a roll shape. And a control device 100 (see FIG. 7).

  In addition, the printer 11 includes a transport device 14 in the main body case 12 that transports the sheet ST along a transport path extending from the holding unit 13 toward the paper discharge unit 12a and functions as a medium discharge device. Further, in the main body case 12, a recording unit 15 that performs recording on the sheet ST unwound from the roll body RS, and a cutter 16 are provided. Further, on the downstream side of the cutter 16 in the transport direction X, a curl correction mechanism 17 constituting a part of the transport device 14 is provided.

  The sheet ST transported by the transport device 14 is subjected to printing (recording) processing on the surface in the recording unit 15, and a portion printed on the surface is cut by the cutter 16. A portion on the leading end side of the cut sheet ST is a cut sheet CS as a medium. In the following description, when expressed as “sheet ST”, a long sheet unwound from the roll body RS, and a sheet cut from the long sheet into a cut sheet CS May be included.

Next, the holding unit 13 will be described.
The holding unit 13 includes a rotation shaft 18 that rotatably supports the roll body RS, and a rotation motor 19 (see FIG. 7) for rotating the rotation shaft 18. When the rotary shaft 18 rotates counterclockwise in FIG. 1 as the rotary motor 19 is driven, the sheet ST is unwound from the roll body RS.

Next, the transport device 14 will be described.
The conveying device 14 includes a plurality of driving rollers 20 to 24 arranged on the conveying path of the sheet ST in order to convey the sheet ST from the upstream side to the downstream side in the conveying direction X, and the driving rollers 20, 21, 22, 24. Driven rollers 30, 31, 32, and 34 that sandwich the sheet ST therebetween. The drive rollers 20, 21, 22, 24 and the driven rollers 30, 31, 32, 34 are arranged at positions facing each other across the transport path. In the following description, the drive roller 22 and the driven roller 32 that make a pair may be referred to as a transport roller pair R2.

  Moreover, the conveying apparatus 14 is provided with the conveyance motor 37 (refer FIG. 7) for rotating the drive rollers 20-24, and the conveyance path | route formation member 38 arrange | positioned in the position corresponding to conveyance roller pair R2. As shown in FIG. 7, the output shaft of the transport motor 37 is provided with a rotary encoder 40 and a power transmission switching device 41 for detecting the rotational speed, rotational position, and rotational direction of the output shaft. The power transmission switching device 41 switches the power transmission destination between the conveyance motor 37 and the drive rollers 20 to 24 in accordance with the conveyance process of the sheet ST.

Next, the recording unit 15 will be described.
The recording unit 15 includes a guide shaft 42 disposed above the conveyance path, a carriage 43 supported by the guide shaft 42, and a recording head 44 as recording means supported by the carriage 43. Further, the recording unit 15 includes a support member 45 disposed at a position facing the recording head 44 with the conveyance path interposed therebetween.

  The guide shaft 42 is installed on the main body case 12 so as to extend along the width direction Y of the sheet ST intersecting (orthogonal) with the conveyance direction X. The carriage 43 reciprocates along the width direction Y while being guided by the guide shaft 42.

  A plurality of suction holes (not shown) are formed on the upper surface side of the support member 45, and the support member 45 has a built-in suction mechanism 46 for sucking the sheet ST through the suction holes. The recording head 44 is provided with a plurality of nozzles 47 that eject ink as liquid. Then, ink is ejected from the nozzles 47 of the recording head 44 onto the surface (upper surface in FIG. 1) of the sheet ST supported by the support member 45, whereby recording (printing) is performed on the sheet ST. Yes.

  Note that the printer 11 divides print data included in one print job into a plurality of pieces, performs print processing based on the divided print data for each scan of the carriage 43, and performs sheet ST between the print processing. The printed portion is intermittently conveyed. That is, in the recording unit 15, an image based on one print job is formed by alternately repeating the formation of a band-shaped image whose width direction Y is the longitudinal direction and paper feeding.

  Further, the cutting of the sheet ST by the cutter 16 is performed in a state in which the conveyance of the sheet ST by the conveyance device 14 is stopped and the upstream side is held by the suction mechanism 46 of the support member 45 while the downstream side is sandwiched between the conveyance roller pair R2. Done. In this embodiment, the sheet ST is cut when the conveyance of the sheet ST is stopped for printing. The cut sheet CS thus cut is continuously conveyed without being stopped by the drive rollers 22 to 24 and discharged to the outside of the main body case 12.

Next, the curl correction mechanism 17 constituting a part of the transport device 14 will be described.
The curl correction mechanism 17 includes driving rollers 23 and 24 and a driven roller 34 as a part of the constituent elements. The curl correction mechanism 17 includes a sensor 50, guide members 51 and 52 (see FIG. 2), a cam motor 53 (see FIG. 7), and a cam mechanism 60 (see FIG. 2).

  The sensor 50 is a reflective optical sensor electrically connected to the control device 100, has a light source unit and a light receiving unit (not shown), and is disposed at a position below the transport path forming member 38. . In the sensor 50, the light receiving unit receives reflected light of light emitted upward from the light source unit, and outputs an electrical signal corresponding to the intensity of the reflected light to the control device 100. For example, the sensor 50 outputs an ON value that is greater than a predetermined threshold when the sheet ST is a reflection target, and outputs an OFF value that is equal to or less than the threshold when the sheet ST is not a reflection target. . Therefore, when the output value of the sensor 50 changes from the OFF value to the ON value, the leading edge of the sheet ST in the transport direction X is detected.

  As shown in FIGS. 2 and 3, the driving rollers 22, 23, and 24 are supported by shaft portions 22 a, 23 a, and 24 a that extend in the width direction Y, respectively. The driven rollers 32 and 34 are supported by shaft portions 32a and 34a extending in the width direction Y, respectively.

  As shown in FIGS. 4 and 5, a plurality (six in this embodiment) of driven rollers 32 are provided along the width direction Y. In the drawing, the three right-hand driven rollers 32 and the three left-hand driven rollers 32 are respectively connected by a connecting portion 32b. In addition, although illustration is abbreviate | omitted, the drive roller 22 is also provided along the width direction Y as many as the driven roller 32 (six in this embodiment). A plurality of drive rollers 23 and 24 (seven in this embodiment) are provided at intervals in the width direction Y. In addition, the driven roller 34 is provided with one small width near the center in the width direction Y, and one wide width roller is provided on each side (three in total).

  In the transport path forming member 38, insertion holes 38a are formed at positions corresponding to the driven roller 32 and the driving roller 22, respectively. The driving roller 22 and the driven roller 32 are in contact with each other through the insertion hole 38a. Further, a passage hole 38b for allowing the light of the sensor 50 to pass through is formed in the transport path forming member 38 at a position corresponding to the insertion hole 38a in the transport direction X and near the center in the width direction Y. Has been.

  As shown in FIG. 3, when the driven roller 34 sandwiches the sheet ST with the driving roller 24, the driven roller 34 is driven to rotate as the sheet ST is conveyed and bends the sheet ST with the driving roller 23. By doing so, the curl of the sheet ST is corrected (decaled). The driving roller 23 is disposed on the upstream side of the driving roller 24 in the transport direction X and transports the sheet ST toward the driving roller 24. When the sheet ST is bent, the driving roller 23 is disposed on the upstream side of the bent portion. It functions as a support part to support.

  As shown in FIGS. 2 and 3, the guide members 51 and 52 are arranged on the upstream side of the drive roller 24 in the transport direction X in order to guide the sheet ST toward the drive roller 24. The guide member 51 guides the back side (lower surface side) of the sheet ST conveyed by the driving roller 23, while the guide member 52 guides the front surface side (upper surface side) of the sheet ST conveyed by the driving roller 23. It is like that.

  2 to 6, the guide member 51 includes a base end portion 51a provided on the upstream side in the transport direction X, and a comb extending from the base end portion 51a toward the downstream side in the transport direction X. And a tooth-shaped guide portion 51b. As shown in FIGS. 4 and 5, in the width direction Y, the guide portion 51b of the guide member 51 is disposed between the adjacent drive rollers 23 at a position corresponding to the end portion of the sheet ST. ing. Further, the transport path forming member 38 is disposed on the upstream side in the transport direction X with respect to the guide portion 51 b of the guide member 51. Furthermore, as shown in FIG. 6, the guide portion 51 b of the guide member 51 is formed with a bent portion 51 c that bends away from the transport path forming member 38 toward the upstream side in the transport direction X.

  As shown in FIGS. 4 to 6, at the downstream end in the transport direction X of the transport path forming member 38, the displacement of the guide portion 51b is allowed at a position corresponding to the guide portion 51b of the guide member 51 in the width direction Y. For this purpose, a notch 38c is formed. In addition, in order to clarify the notch part 38c, the guide member 51, etc., while the illustration of the guide member 52 is abbreviate | omitted in FIGS. 4-6, in FIG. 6, the driving rollers 22 and 23, the driven roller 32, and the cut sheet CS Is omitted. Moreover, in FIG.4 and FIG.5, the cut sheet CS is shown with the dashed-two dotted line.

  As shown in FIGS. 2 and 3, the cam mechanism 60 includes a cam shaft 62 supported by the main body case 12, cam members 63 and 64 that rotate as the cam shaft 62 rotates, and cam members 63 and 64. Lever 65, 66 which follows each rotation is provided. The lever 65 is rotatable around a lever shaft 67 disposed on the upstream side of the cam shaft 62 in the transport direction X. The lever 66 is rotatable about a lever shaft 68 disposed on the downstream side of the cam shaft 62 in the transport direction X. As shown in FIG. 6, the cam members 63 and 64 and the levers 65 and 66 are provided on both end sides of the cam shaft 62, respectively.

  The lever 65 has a guide member 51 fixed to a support portion 65a extending from the lever shaft 67 toward the downstream side in the transport direction X, and extends obliquely downward from the support portion 65a toward the downstream side in the transport direction X. The engaging portion 65 b is engaged with the cam member 63. The lever 65 is biased counterclockwise in FIG. 2 by a biasing member (for example, a torsion coil spring) (not shown), and is always held in the state shown in FIGS.

  In the lever 66, an engaging portion 66 a extending downward from the lever shaft 68 is engaged with the cam member 64. In the lever 66, the shaft portion 34a of the driven roller 34 is rotatably supported on the distal end side of the support portion 66b extending upward from the lever shaft 68. A guide member 52 is fixed to the support portion 66 b of the lever 66. The lever 65 is urged counterclockwise in FIG. 2 by an urging force of an urging member (for example, a torsion coil spring) (not shown), and is always held in the state shown in FIGS. .

  The cam shaft 62 rotates as the cam motor 53 is driven. Then, when the cam shaft 62 rotates approximately 180 degrees from the state shown in FIG. 2, the cam members 63 and 64 together with the cam shaft 62 rotate to the position shown in FIG. Then, the lever 65 rotates counterclockwise in FIG. 2 according to the rotation of the cam member 63, and the lever 66 rotates in the clockwise direction in FIG. 2 according to the rotation of the cam member 64.

  When the cam shaft 62 rotates approximately 180 degrees from the state shown in FIG. 3 as the cam motor 53 is driven, the cam members 63 and 64 are rotated together with the cam shaft 62 to return to the position shown in FIG. Further, as the cam member 63 rotates, the lever 65 rotates in the clockwise direction in FIG. 3 to return to the position shown in FIG. 2, and as the cam member 64 rotates, the lever 66 rotates in the counterclockwise direction in FIG. Return to the position shown in FIG.

  The guide member 51 swings around the base end 51a side with the rotation of the lever 65, so that the guide portion 51b forms a transport path (the position shown in FIG. 2), and the guide portion 51b It is displaced between the retracted position (position shown in FIG. 3) that is separated from the transport path. In the guide position, the guide member 51 is configured such that the upper surface of the guide portion 51b on the tip side of the bent portion 51c is substantially flush with the upper surface of the transport path forming member 38 to form the support surface of the sheet ST. It has become. At this time, the bent portion 51 c of the guide member 51 is disposed in the notch 38 c of the transport path forming member 38.

  The driven roller 34 has a standby position (position shown in FIG. 2) in which the peripheral surface of the driven roller 34 is separated from the transport path along the movement path substantially along the peripheral surface of the drive roller 24 as the lever 66 rotates. Then, the sheet ST is sandwiched between the drive roller 24 and moved between a clamping position (position shown in FIG. 3) for correcting curl. In the clamping position, the driven roller 34 is disposed at a position where the distance from the driving roller 24 is shorter than the thickness of the sheet ST. In the standby position, the driven roller 34 is disposed such that the distance from the driving roller 24 is longer than the thickness of the sheet ST. Therefore, when the driven roller 34 is in the standby position, the sheet ST is conveyed by the drive roller 24 downstream along the conveyance path indicated by a two-dot chain line in FIG. 3 without being sandwiched by the driven roller 34.

  As shown in FIG. 2, the guide member 51 has a length in the transport direction X that is longer than the diameter of the drive roller 23, and the guide portion 51 b extends to a position where the tip of the guide member 51 b is applied to the drive roller 24. . That is, the guide portion 51 b of the guide member 51 has a downstream end in the transport direction X that is disposed downstream of the upstream end of the circumferential surface of the drive roller 24. Further, as shown in FIG. 3, the driven roller 34 has a mode in which the peripheral surface thereof intersects with the conveyance path indicated by a two-dot chain line in the drawing at the holding position. Therefore, the peripheral surface of the driven roller 34 in the clamping position and the guide portion 51b of the guide member 51 in the guide position interfere with each other.

  In order to avoid such interference between the guide member 51 and the driven roller 34, in this embodiment, when the driven roller 34 moves downward toward the clamping position, the guide member 51 moves from the clamping position of the driven roller 34 to the standby position. It is possible to move to a retreat position that is spaced downward from the movement path. When the cam shaft 62 rotates, the guide member 51 moves with the rotation of the cam member 63, and the driven roller 34 moves with the rotation of the cam member 64. Therefore, the guide portion 51b of the guide member 51 moves downward from the guide position toward the retracted position at the timing when the driven roller 34 moves downward from the standby position toward the clamping position.

  As shown in FIG. 4, the discharge assisting member 69 is supported on the shaft portion 24 a that supports the driving roller 24 at a position adjacent to the short driving roller 24 located in the center in the width direction Y (left side in FIG. 4). Has been. In the discharge assisting member 69, an engagement tooth portion 69a is formed along the circumferential direction at a position on the left side in FIG. In addition, one protrusion 69b is provided on the outer peripheral side of the discharge assisting member 69 at a position on the right side of the engagement tooth portion 69a in FIG. Note that the guide portion 51b of the guide member 51 at a position corresponding to the discharge assisting member 69 in the width direction Y has a length in the transport direction X that is longer than that of the other guide portions 51b in order to avoid interference with the protrusion 69b. Slightly shorter.

  As shown in FIG. 6, a gear 70 that rotates integrally with the cam shaft 62 is fixed at a position corresponding to the discharge assisting member 69 in the width direction Y of the cam shaft 62. In addition, gears 71, 72, 73 are arranged between the discharge assisting member 69 and the gear 70. The gear 71 meshes with the gear 70 and the gear 72, and the gear 73 meshes with the gear 72 and the engaging tooth portion 69 a of the discharge assisting member 69. In the present embodiment, the gears 70, 71, 72, 73 constitute a gear mechanism 74 for transmitting the rotation of the cam shaft 62 to the discharge assisting member 69.

  When the cam shaft 62 rotates approximately 180 degrees from the state shown in FIG. 3 by driving the cam motor 53, the discharge assisting member 69 moves approximately 180 in the counterclockwise direction in FIG. It is designed to rotate. As a result of this rotation, the protrusion 69b of the discharge assisting member 69 protrudes from the position shown in FIG. 3 to the transport path and then moves to a position away from the transport path (position shown in FIG. 2). . That is, the protrusion 69b of the discharge assisting member 69 protrudes into the transport path when the driven roller 34 moves from the clamping position to the standby position.

  On the other hand, when the cam shaft 62 is rotated approximately 180 degrees from the state shown in FIG. 2 by driving the cam motor 53, the discharge assisting member 69 is rotated approximately 180 in the counterclockwise direction in FIG. It is designed to rotate. As a result of this rotation, the projection 69b of the discharge assisting member 69 returns from the position shown in FIG. 2 to the position shown in FIG. That is, when the driven roller 34 moves from the standby position to the clamping position, the protrusion 69b of the discharge assisting member 69 moves from the downstream side to the upstream side in the conveyance direction X through the movement path that is separated from the conveyance path. .

Next, the electrical configuration of the printer 11 will be described.
As shown in FIG. 7, the control device 100 includes a computer 101 as a control means, a head drive circuit 102, and motor drive circuits 103, 104, and 105. The computer 101 is electrically connected to the head drive circuit 102 and the motor drive circuits 103, 104, and 105 via the bus 108.

  The computer 101 includes an ASIC 109 (Application Specific IC), a CPU 110, a ROM 111, a RAM 112, and a nonvolatile memory 113. The ROM 111 stores various control programs and various data. The nonvolatile memory 113 stores various programs including a firmware program and various data necessary for print processing. The RAM 112 temporarily stores program data executed by the CPU 110, various data that are calculation results and processing results by the CPU 110, various data processed by the ASIC 109, and the like.

  The computer 101 performs various controls by the CPU 110 executing a program stored in the ROM 111 or the like. For example, the computer 101 controls the recording head 44 via the head drive circuit 102 and controls the rotary motor 19, the transport motor 37 and the cam motor 53 via the motor drive circuits 103, 104 and 105, respectively. The computer 101 controls the transport motor 37 based on the detection signal from the rotary encoder 40. Further, the computer 101 controls the cam motor 53 based on the detection result of the sensor 50 and the like.

Next, curl correction processing and cut sheet CS discharge processing in the printer 11 will be described.
In the printer 11, the curl correction process (decal process) is performed on the cut sheet CS cut after the recording process is completed. At this time, in order to reliably insert the leading end of the cut sheet CS between the driven roller 34 and the driving roller 24, the computer 101 inserts the sheet ST between the driven roller 34 and the driving roller 24 in the standby position. In this state, the driven roller 34 is moved from the standby position to the clamping position. That is, the driven roller 34 moves to a clamping position where the cut sheet CS is clamped between the driven roller 34 and the drive roller 24 when the cut sheet CS is conveyed.

  Further, the driven roller 34 moves from the nipping position to the standby position when the trailing end of the cut sheet CS passes between the driven roller 34 and the driving roller 24 to complete the next cut sheet. Prepare for CS transport. At this time, the discharge assisting member 69 rotates while causing the projection 69b to protrude in the conveyance path of the cut sheet CS, thereby contacting the rear end of the cut sheet CS and pushing out toward the downstream side in the conveyance direction X. That is, along with the end operation of the curl correction process, a discharge process for discharging the cut sheet CS to the outside of the conveyance path in the main body case 12 is performed.

Next, a curl correction processing routine executed by the computer 101 when cutting of the sheet ST is completed will be described with reference to FIG.
First, in step S11, the computer 101 acquires the length L in the conveyance direction X of the cut sheet CS, and proceeds to step S12.

  In step S12, based on the length L of the cut sheet CS acquired by the computer 101, the curl correction operation start count value Ns for determining the timing for starting the curl correction operation and the curl correction operation end for determining the timing for ending the curl correction operation. The count value Ne is determined, and the process proceeds to step S13.

  In step S13, the computer 101 determines whether the sensor 50 has detected the leading edge of the cut sheet CS. When the sensor 50 detects the leading edge of the cut sheet CS, the computer 101 proceeds to step S14. On the other hand, when the sensor 50 has not detected the leading edge of the cut sheet CS, the computer 101 makes the same determination at a predetermined timing. repeat.

In step S14, the computer 101 starts counting and proceeds to step S15.
In step S15, the computer 101 determines whether or not the count value N is equal to or greater than the curl correction operation start count value Ns. Then, the computer 101 proceeds to step S16 when the count value N becomes equal to or greater than the curl correction operation start count value Ns, while the count value N is less than a predetermined value when the count value N is less than the curl correction operation start count value Ns. The same determination is repeated at the timing.

  In step S <b> 16, the computer 101 drives the cam motor 53 to start the curl correction operation, and the process proceeds to step 17. Specifically, by rotating the cam shaft 62 by approximately 180 degrees by driving the cam motor 53, the driven roller 34 is moved from the standby position to the correction position, and the guide member 51 is moved from the guide position to the retracted position. As a result, the cut sheet CS having the leading end inserted between the drive roller 24 and the driven roller 34 by the guide member 51 is bent in the direction opposite to the curl winding direction with the drive roller 23 to correct the curl. The

  In step S17, the computer 101 determines whether or not the count value N is equal to or greater than the curl correction operation end count value Ne. The computer 101 proceeds to step S18 when the count value N is equal to or greater than the curl correction operation end count value Ne, while the computer 101 proceeds to a predetermined value when the count value N is less than the curl correction operation end count value Ne. The same determination is repeated at the timing.

  In step S <b> 18, the computer 101 drives the cam motor 53 to end the curl correction operation, and the process ends. Specifically, the cam shaft 62 is rotated by approximately 180 degrees by driving the cam motor 53, whereby the driven roller 34 is moved from the correction position to the standby position, and the guide member 51 is moved from the retracted position to the guide position.

  The driven roller 34 is moved from the standby position spaced upward from the drive roller 24 to the clamping position upstream of the standby position in the transport direction X, and is cut by bending the cut sheet CS at the clamping position. Correct the curl of the sheet CS. Therefore, the decurled sheet ST is conveyed by the driving roller 24 so that the leading end side that is the downstream side in the conveying direction X is inclined upward. Therefore, if the cut sheet CS is removed from the nipping by the driven roller 34 and the driving roller 24, the conveyance force may be insufficient and may not be discharged from the main body case 12.

  In this regard, in the present embodiment, when the cam shaft 62 rotates in step S18, as shown in FIG. 9, the gears 70 to 73 rotate in the directions indicated by the arrows in FIG. Since the projection 69b of the projection rotates into the conveyance path so as to push out the rear end of the cut sheet CS, the cut sheet CS is reliably discharged to the outside of the main body case 12.

  Further, since the protrusion 69b of the discharge assisting member 69 moves toward the upstream side in the transport direction X in step S16 where the curl correction operation for the next cut sheet CS is started, it prepares for the discharge of the next cut sheet CS. be able to. Therefore, even when a plurality of cut sheets CS are continuously discharged by rotating the discharge assisting member 69 in accordance with the start operation and the end operation of the curl correction operation, the rear end of each cut sheet CS is set to one. The protrusion 69b can be pressed.

According to the above embodiment, the following effects can be obtained.
(1) Since the protruding portion 69b of the discharge assisting member 69 protrudes to the conveyance path when the driven roller 34 moves from the holding position to the standby position, the cut sheet CS from which the holding by the driven roller 34 and the driving roller 24 is released. Can remain on the transport path, contact the rear end of the cut sheet CS, and be discharged to the outside of the transport path. Therefore, when the driven roller 34 holds the cut sheet CS, the discharge assisting member 69 does not contact the cut sheet CS, and a member for preventing contact between the cut sheet CS and the discharge assisting member 69 is provided. Since it is not necessary, unnecessary contact of the discharge assisting member 69 with the cut sheet CS and peripheral devices can be suppressed.

  (2) Since only one protrusion 69b is provided on the outer peripheral side of the discharge assisting member 69, when the driven roller 34 moves from the standby position to the clamping position, it passes through a movement path that is separated from the conveyance path of the cut sheet CS. By moving, it is possible to return to the position before discharging the cut sheet CS while avoiding unnecessary contact with the cut sheet CS.

  (3) Since the cut sheet CS has an aspect in which the front end side faces upward when being sandwiched between the driving roller 24 and the driven roller 34, the cut sheet CS is on the conveyance path when it is removed from the sandwiching of the driving roller 24 and the driven roller 34. However, when the protrusion 69b of the discharge assisting member 69 contacts the rear end of the cut sheet CS, the cut sheet CS can be reliably discharged.

  (4) By rotating the cam shaft 62, the protrusion 69b of the discharge assisting member 69 can be moved together with the driven roller. Therefore, it is not necessary to provide a dedicated drive source for displacing the protrusion 69b.

  (5) By moving the driven roller 34 to the standby position, the sheet ST can be smoothly inserted between the driven roller 34 and the driving roller 24. Since the driven roller 34 is moved from the standby position to the clamping position while the sheet ST is inserted between the driven roller 34 and the driving roller 24, the sheet ST can be securely clamped.

  (6) The driven roller 34 can pass the sheet ST without bending by moving from the clamping position to the standby position. Therefore, when it is not necessary to correct the curl, the load when the sheet ST is conveyed can be reduced by moving the driven roller 34 to the standby position.

In addition, you may change the said embodiment as follows.
A drive source other than the cam motor 53 may be used to rotate the discharge assisting member 69.

  A plurality of discharge assisting members 69 may be provided along the width direction Y of the shaft portion 24a, or the size in the width direction Y may be changed. Further, a plurality of protrusions 69b may be provided as long as the protrusions 69b are arranged in the width direction Y on the outer peripheral side of the discharge assisting member 69.

The discharge assisting member 69 may be supported by a shaft portion of a driving roller or a driven roller that does not constitute the curl correction mechanism 17.
The medium is not limited to the sheet cut by the cutter 16 provided in the printer 11 but may be a cut sheet conveyed to the recording unit 15 in a state of being cut into a predetermined size in advance.

The curl correction mechanism 17 may not include the guide member 51. In this case, the configuration of the curl correction mechanism 17 can be simplified.
The driven roller 34 may be configured to be movable to a plurality of sandwiching positions and standby positions according to the thickness of the sheet ST, for example.

-The installation number of the driving rollers 22, 23, 24 and the driven rollers 32, 34, the size in the width direction Y, and the like can be arbitrarily changed.
The sensor 50 is not limited to an optical sensor, and can be changed to any type of sensor such as a contact sensor.

The cut sheet CS is not limited to paper, and can be applied to any medium such as a resin film or a metal film.
The recording process is not limited to printing or printing, but may be various processes such as attaching a seal to a medium, transferring a foil, making a hole, or making a cut. The processing apparatus that performs each of these processes may be provided with the medium discharging apparatus of the present invention.

  In the above-described embodiment, the recording apparatus adopting the inkjet method as the recording method has been described. However, the recording device may be changed to a recording device of an arbitrary recording method such as an electrophotographic method or a thermal transfer method. Further, the recording apparatus is not limited to a printer, but may be a FAX apparatus, a copying apparatus, or a multifunction machine having a plurality of these functions. Further, as the recording apparatus, a liquid ejecting apparatus including a liquid ejecting head that ejects or ejects a small amount of liquid droplets other than ink may be employed. In addition, a droplet means the state of the liquid discharged from the said liquid ejecting apparatus, and shall also include what pulls a tail in granular shape, tear shape, and thread shape. The liquid here may be any material that can be ejected by the liquid ejecting apparatus. For example, it may be in a state in which the substance is in a liquid phase, such as a liquid with high or low viscosity, sol, gel water, other inorganic solvents, organic solvents, solutions, liquid resins, liquid metals (metal melts ) And a liquid as one state of a substance, as well as a material in which particles of a functional material made of a solid such as a pigment or metal particles are dissolved, dispersed or mixed in a solvent. Further, representative examples of the liquid include ink and liquid crystal as described in the above embodiment. Here, the ink includes general water-based inks and oil-based inks, and various liquid compositions such as gel inks and hot melt inks. As a specific example of the liquid ejecting apparatus, for example, a liquid containing a material such as an electrode material or a color material used for manufacturing a liquid crystal display, an EL (electroluminescence) display, a surface emitting display, a color filter, or the like in a dispersed or dissolved state. It may be a liquid ejecting apparatus, a textile printing apparatus, or the like.

  DESCRIPTION OF SYMBOLS 11 ... Printer as a recording device, 12 ... Main body case, 14 ... Conveying device functioning as a medium discharging device, 24 ... Driving roller, 34 ... Driven roller, 44 ... Recording head as recording means, 60 ... Cam mechanism, 62 ... Cam shaft, 64 ... cam member, 69 ... discharge assisting member, 69b ... projection, 74 ... gear mechanism, CS ... cut sheet as medium, X ... transport direction.

Claims (4)

A drive roller disposed in the medium transport path;
A driven roller that moves to a holding position for holding the medium between the drive roller and the medium when the medium is conveyed, and moves to a standby position that is separated from the conveyance path when the medium has been conveyed;
When the driven roller moves from the clamping position to the standby position, it has a protrusion that protrudes into the transport path, and the protrusion contacts the rear end of the medium on the transport path. A discharge assisting member for discharging the medium to the outside of the transport path;
A cam mechanism having a cam shaft and a cam member that rotates as the cam shaft rotates;
A gear mechanism for transmitting rotation of the camshaft to the discharge assisting member,
The medium discharge device according to claim 1, wherein the driven roller moves with the rotation of the cam member . One protrusion is provided on the outer peripheral side of the discharge assisting member, and when the driven roller moves from the standby position to the clamping position, the medium is conveyed through a movement path that is separated from the conveyance path. The medium discharging apparatus according to claim 1, wherein the medium discharging apparatus moves from the downstream side toward the upstream side in the direction. The driven roller is movable between the standby position that is spaced upward from the drive roller and the clamping position that is upstream of the standby position in the conveyance direction of the medium. The medium discharging apparatus according to claim 1, wherein the curling of the medium is corrected by bending the medium. A body case,
A recording means arranged in the main body case for recording on the medium;
Recording apparatus characterized by comprising: a medium discharging apparatus according to any one of claims 1 to 3 for discharging the medium on the outside of the main body case.

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