JP5293047B2 - Target conveying apparatus and recording apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a target conveyance device and a recording device accurately winding a long target conveyed from the upstream side at the downstream side. <P>SOLUTION: A winding part 15 includes: a first nip roller 41 intermittently conveying a continuous form 12 from the upstream side to the downstream side; and a rotational shaft 46 continuously winding the continuous form 12 intermittently conveyed by the first nip roller 41, at the downstream side. A second nip roller 43 continuously conveying the continuous form 12 conveyed from a first nip roller 41 side to a rotational shaft 46 side, is disposed between the first nit roller 41 and the rotational shaft 46 in the conveyance path of the continuous form 12. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a target transport apparatus that transports a long target and a recording apparatus including the target transport apparatus.

Conventionally, what is shown in Patent Document 1 is known as a winding device (target conveying device) that winds a strip (long target) unwound from the upstream side on the downstream side. In the winding device described in Patent Document 1, the protective paper, which is a belt wound around the supply roller, is unwound to the downstream side by intermittently rotating the supply roller. The winding roller (winding means) arranged on the downstream side is continuously wound by continuously rotating.
JP-A-9-278242

  By the way, in the winding device of Patent Document 1, the protective paper that is intermittently wound from the supply roller that intermittently rotates on the upstream side is continuously wound by the winding roller that continuously rotates on the downstream side. That is, since the supply roller and the take-up roller are not in the same rotational form, there is a possibility that a take-up deviation may occur when the protective paper is taken up by the take-up roller. There was something I couldn't take.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a target transport apparatus and a recording apparatus capable of winding a long target transported from the upstream side with accuracy on the downstream side. It is to provide.

In order to achieve the above object, a target transport apparatus of the present invention is intermittently transported by a first transport means for intermittently transporting a long target from an upstream side to a downstream side, and the first transport means. And a winding means for continuously winding the target on the downstream side, wherein the first conveying means is disposed between the first conveying means and the winding means in the target conveying path. A second conveying unit that continuously conveys the target conveyed from the side to the winding unit side, and further controls the driving of the first conveying unit, the second conveying unit, and the winding unit Means for controlling the target by the second transport means and the target by the winding means in accordance with the transport stop time of the target by the first transport means. A measuring means for measuring a winding diameter of the target in a state wound by the winding means, and the winding means winds the target by rotating. A rotation axis that takes the rotation axis of the rotation axis in accordance with a measurement result of the measurement unit, and the measurement unit is within the range of the rotation axis above the rotation axis. Supported by the first arm, a first arm supported by the shaft so as to be swingable, a second arm swinging in conjunction with the swing of the first arm, and the first arm. An abutting member that abuts from the side by its own weight with respect to a radially outer surface of the rotating shaft of the target wound by the rotating shaft; and a cover provided at one end of the second arm. Perception The sensed part that moves in response to a change in the winding diameter of the target and the sensed part at each movement point of the sensed part that corresponds to a difference change point in the winding diameter of the target. And a plurality of sensors for sensing each part .

  According to this structure, the target continuously conveyed by the 2nd conveyance means is wound up continuously by the winding means. That is, the winding form of the target by the winding means is the same as the transporting form of the target by the second transporting means provided immediately upstream of the winding means in the target transport path. When the target is wound up, it becomes difficult for the target to be unwound. Therefore, the long target conveyed from the upstream side can be accurately wound on the downstream side by the winding means.

Further , according to the target conveyance stop time (intermittent conveyance conveyance cycle) by the first conveyance unit, that is, the progress of the target conveyance by the first conveyance unit, the target conveyance speed by the second conveyance unit and the winding unit By changing the winding speed of the target, it is possible to suppress the slackness of the target during conveyance. In this specification, the “target winding speed” means the target transport speed when the target is wound by the winding means.

In addition, when the target is wound around a rotating shaft that rotates at a constant speed, the tension applied to the target decreases as the winding diameter (amount) of the target wound on the rotating shaft increases. In this regard, according to the present invention, even if the winding diameter of the target wound around the rotating shaft changes, the control means rotates the rotating shaft according to the measurement result of the target winding diameter by the measuring means. By changing the torque, the tension applied to the target can be kept constant.

Furthermore , each sensor senses the sensed portion of the second arm at each change point of the target winding diameter, so that the target winding diameter wound by the winding means is changed by the same difference. It becomes possible to reliably measure (detect) each point.

In the target transport apparatus of the present invention, the second transport unit includes a pair of rollers that feed the downstream while sandwiching the target.
According to this configuration, the target can be transported smoothly and reliably by the pair of rollers.

  The recording apparatus of the present invention includes a recording unit that performs a recording process on the target, and a conveying unit that conveys the target recorded by the recording unit, and the conveying unit is configured by the target conveying apparatus having the above configuration.

  According to this configuration, it is possible to obtain the same effects as those of the target transport device.

  Hereinafter, an embodiment in which the recording apparatus of the present invention is embodied in an ink jet printer will be described with reference to the drawings. In the following description, when referring to “up and down direction” and “left and right direction”, the direction indicated by the arrow in FIG. 1 is used as a reference. Further, when referring to the “front-rear direction”, the direction perpendicular to the paper surface in FIG.

  As shown in FIG. 1, an ink jet printer 11 as a recording device includes a feeding unit 13 that feeds a continuous paper 12 as a long target, and a continuous paper 12 fed from the feeding unit 13 as a recording process. A main body unit 14 that sequentially performs printing, and a winding unit 15 that winds the continuous paper 12 that has been printed by the main body unit 14 are provided. That is, the main body portion 14 includes a rectangular parallelepiped main body case 16, and the feeding portion 13 is disposed on the left side of the main body case 16 on the upstream side in the conveyance path of the continuous paper 12 and the main body case 16 on the downstream side. The winding part 15 is arrange | positioned on the right side. In the present embodiment, the winding unit 15 constitutes a target conveying device as a conveying unit.

  The pay-out portion 13 includes a support plate 17 extending leftward from the lower left end portion of the main body case 16. The left end portion of the support plate 17 faces forward (front side in the direction perpendicular to the paper surface in FIG. 1). A winding shaft 18 extending in a rotating manner is supported rotatably with respect to the support plate 17. A continuous paper 12 previously wound in a roll shape is supported on the winding shaft 18 so as to be rotatable integrally with the winding shaft 18.

  Further, the feeding portion 13 includes a plate-like feeding stand 19 that extends horizontally from the center of the left surface of the main body case 16 toward the left, and a continuous paper fed from the winding shaft 18 is provided at the tip of the feeding stand 19. A relay roller 20 is rotatably provided for winding 12 and guiding it to the upper surface of the feeding table 19. The continuous paper 12 guided to the upper surface of the feeding table 19 is conveyed along the upper surface of the feeding table 19 toward the right side (main body 14 side).

  A flat base 21 that divides the inside of the main body case 16 in the vertical direction is provided at a position slightly above the central portion in the vertical direction in the main body case 16 of the main body portion 14. A region above the table 21 is a printing chamber 22 for printing on the continuous paper 12.

  On the left wall of the main body case 16, an unillustrated carry-in port for carrying the continuous paper 12 into the main body case 16 from the upper surface of the feeding table 19 is provided. A pair of upper and lower pulling drive rollers 23 are rotatably provided so as to face each other. When the drawing drive roller 23 is driven, the continuous paper 12 is drawn into the main body case 16 from the carry-in port (not shown) while being sandwiched between the drawing drive rollers 23.

  A relay roller 25 is rotatably provided at the lower right side of the pull-in driving roller 23 in the main body case 16, and the continuous paper 12 is wound around the relay roller 25 so as to go from the upper left to the upper right. It has been. A relay roller 26 is rotatably provided at a position to the right of the relay roller 25 and closer to the left end in the printing chamber 22, and the continuous paper 12 is provided on the base 21 on the relay roller 26. It is wound so as to go through the insertion hole (not shown) from the diagonally lower left to the horizontal right.

  A rectangular plate-like platen 27 is supported on the base 21 on the right side of the relay roller 26 in the printing chamber 22. A conversion roller 28 is rotatably provided on the right side of the platen 27 so as to face the relay roller 26 across the platen 27. The upper surface of the relay roller 26, the upper surface of the platen 27, and the upper surface of the conversion roller 28 are They are flush with each other.

  The continuous paper 12 that goes in the horizontal right direction along the upper surface of the platen 27 from the relay roller 26 is wound around the conversion roller 28 so as to go in the vertical downward direction. That is, the conversion roller 28 changes the conveyance direction of the continuous paper 12 from the horizontal right direction to the vertical downward direction. Then, the continuous paper 12 whose conveyance direction is changed vertically downward by the conversion roller 28 is conveyed vertically downward through an insertion hole (not shown) provided in the base 21.

  Guide rails 29 (indicated by a two-dot chain line in FIG. 1) extending in the left-right direction are provided on both the front and rear sides of the platen 27 in the printing chamber 22 so as to form a pair. It is higher than the top surface. A rectangular plate-shaped carriage 30 is supported on the upper surfaces of both guide rails 29 so as to be reciprocally movable in the left-right direction along the both guide rails 29 by driving a carriage motor (not shown).

  A recording head 31 as recording means is supported on the lower surface of the carriage 30. Further, a valve unit 32 for temporarily storing ink supplied from an ink cartridge (not shown) via an ink supply pipe (not shown) is provided on the upper wall of the main body case 16 in the printing chamber 22. . The valve unit 32 is connected to the recording head 31 via an ink supply tube (not shown), and supplies ink to the recording head 31 via the ink supply tube.

  A plurality of nozzle openings (not shown) are provided on the lower surface of the recording head 31, and the ink supplied from the valve unit 32 is ejected from the nozzle openings toward the continuous paper 12 supported on the platen 27. In this way, printing is performed. Therefore, the area from the left end to the right end of the platen 27 where the continuous paper 12 is printed, which is in the middle of the transport path of the continuous paper 12, is the printing area E, and the continuous paper 12 is transported by the continuous paper 12. The path is intermittently conveyed in units of areas corresponding to the printing area E.

  As shown in FIG. 1, a reversing roller 33 is rotatably disposed at a position below the conversion roller 28 in the lower end portion in the main body case 16, and is conveyed downward from the conversion roller 28. The continuous paper 12 is wound around the reversing roller 33 and is conveyed obliquely upward to the right. A drying device 34 for drying the printed continuous paper 12 is provided between the conversion roller 28 and the reverse roller 33 in the conveyance path of the continuous paper 12, and the continuous paper 12 after printing is stored in the drying device 34. It is designed to be dried by being blown with warm air in the process of passing through. Then, the continuous paper 12 conveyed from the reversing roller 33 is conveyed to the winding unit 15 side through a carry-out port (not shown) provided near the upper end of the drying device 34 on the right wall of the main body case 16. It has come to be.

  The winding portion 15 includes a rectangular parallelepiped winding frame 40 provided so as to be adjacent to the right surface of the main body case 16, and the height of the winding frame 40 is substantially the same as both guide rails 29. . A pair of upper and lower first nip rollers 41 for conveying the continuous paper 12 conveyed from the main body case 16 side to the downstream side while sandwiching the continuous paper 12 conveyed from the main body case 16 side is provided at the left end portion at the upper part in the winding frame 40. The first nip roller 41 is connected to a first motor 42 (see FIG. 4) and is driven to rotate by the first motor 42.

  On the right side of the first nip roller 41, there is provided a second nip roller 43 as a pair of upper and lower rollers for conveying the continuous paper 12 conveyed from the first nip roller 41 to the downstream side with the continuous paper 12 interposed therebetween. The second nip roller 43 is connected to a second motor 44 (see FIG. 4) and is driven to rotate by the second motor 44. The continuous paper 12 conveyed from the first nip roller 41 to the second nip roller 43 is located between the first nip roller 41 and the second nip roller 43 and below the first nip roller 41 and the second nip roller 43. There is provided a first tension roller 45 that applies tension to the continuous paper 12 to such an extent that no slack occurs.

  The first tension roller 45 is engaged with the continuous paper 12 so as to apply tension to the continuous paper 12 by its own weight, and is set to a weight that does not cause the continuous paper 12 to slack. The first tension roller 45 is guided along the vertical direction by a guide member (not shown) provided in the winding frame 40. That is, the guide member allows the first tension roller 45 to move in the vertical direction and restricts the movement in the left-right direction and the front-rear direction.

  A rotation shaft 46 for sequentially winding the continuous paper 12 conveyed from the second nip roller 43 is provided at an obliquely lower right side of the second nip roller 43 so as to extend in the front-rear direction. The rotary shaft 46 is connected to a winding motor 47 (see FIG. 4), and is rotated by the winding motor 47 in the direction indicated by the arrow in FIG. 2 (counterclockwise in FIGS. 1 and 2). It has become. At a position between the second nip roller 43 and the rotary shaft 46, a tension is applied to the continuous paper 12 to such an extent that the continuous paper 12 conveyed from the second nip roller 43 to the rotary shaft 46 does not sag. A two-tension roller 48 is provided.

  As shown in FIGS. 1 and 2, a shaft 49 extending in the front-rear direction is provided obliquely to the left of the rotation shaft 46. A first arm 50A extending straight from the shaft 49 toward the lower left is supported on the shaft 49 so as to be swingable at the upper end thereof. Further, a second arm 50B extending straight from the shaft 49 toward the upper right is supported on the shaft 49 so as to be swingable at the lower end thereof. The second arm 50B swings in conjunction with the swing of the first arm 50A. That is, the first arm 50 </ b> A and the second arm 50 </ b> B extend along the same straight line and swing integrally with the shaft 49 as the center.

  A driven roller 51 as a contact member is rotatably supported at the lower end of the first arm 50A. The driven roller 51 comes into contact with the abutted surface 12a, which is the surface on the radially outer side of the rotation shaft 46, of the continuous paper 12 in the state of being wound around the rotation shaft 46 by its own weight. In the initial state in which the continuous paper 12 is not wound around the rotation shaft 46 at all, the driven roller 51 comes into contact with the peripheral surface 46a (the surface on which the continuous paper 12 is wound) of the rotation shaft 46 by its own weight. It has become.

  As shown in FIG. 2, when the winding diameter of the continuous paper 12 wound by the rotating shaft 46 increases by a multiple (not including 0) of a preset value A from the initial state, continuous It is an equivariant change point of the winding diameter of the paper 12. That is, when the winding diameter of the continuous paper 12 taken up by the rotary shaft 46 is the radius R + set value A of the rotary shaft 46 and the radius R + set value 2A of the rotary shaft 46, the radius of the rotary shaft 46 is set. When R + set value 3A and the radius R + set value 4A of the rotating shaft 46, the difference change point of the winding diameter of the continuous paper 12 is set.

  The winding diameter of the continuous paper 12 indicates the distance from the center of the rotating shaft 46 to the contacted surface 12a of the continuous paper 12, and the set value 2A, the set value 3A, and the set value 4A are set values A, respectively. 2 times, 3 times the set value A, and 4 times the set value A (the thickness of the continuous paper 12 wound by the rotating shaft 46).

  When the winding diameter of the continuous paper 12 by the rotary shaft 46 is the radius R of the rotary shaft 46, when the radius R of the rotary shaft 46 + the set value A, when the radius R of the rotary shaft 46 + the set value 2A, the rotary shaft The upper end portion (one end portion) 50a of the second arm 50B when the driven roller 51 abuts against the abutted surface 12a when the radius R + 46 is a set value 3A and the radius R + the set value 4A of the rotating shaft 46 is. A plurality of (five in this embodiment) photointerrupters 52a to 52e, which are sensors for detecting (detecting) the upper end 50a, are sequentially arranged in parallel from the left side to the right side at positions corresponding to the respective movement points. Has been.

  That is, each of the photo interrupters 52a to 52e is configured so that the second arm 50B is interlocked with the swing of the first arm 50A about the shaft 49 as the winding diameter of the continuous paper 12 is increased (changed) by the rotating shaft 46. The upper arm 50B of the second arm 50B is arranged along an arcuate movement locus when swinging about the shaft 49. Therefore, the winding diameter of the continuous paper 12 by the rotating shaft 46 at that time can be measured (detected) depending on which of the photo interrupters 52a to 52e is sensing the upper end portion 50a of the second arm 50B. ing. In the present embodiment, the sensed part is configured by the upper end part 50a of the second arm 50B.

  As shown in FIG. 3, each of the photo interrupters 52a to 52e includes a light emitting element 52A and a light receiving element 52B arranged to face each other at a predetermined interval in the front-rear direction. The upper end 50a of the second arm 50B enters between 52B and the light is blocked, so that the upper end 50a is sensed. In this case, the arrangement angle (arrangement interval) between the photo interrupters 52a to 52e around the axis 49 is not constant.

  In the present embodiment, the first nip roller 41 and the first motor 42 constitute a first conveying means, the second nip roller 43 and the second motor 44 constitute a second conveying means, and the rotating shaft 46 and the winding shaft. The take-up motor 47 constitutes winding means, and the shaft 49, the first arm 50A, the second arm 50B, the driven roller 51, and the photo interrupters 52a to 52e constitute measuring means.

Next, the electrical configuration of the ink jet printer 11 will be described.
As shown in FIG. 4, the ink jet printer 11 includes a control unit 53 as control means for controlling the operating state of the ink jet printer 11. The control unit 53 is electrically connected to the first motor 42, the second motor 44, the take-up motor 47, the photo interrupters 52a to 52e, the operation panel (not shown), and the like, as shown in FIG. The table is stored. The operation panel allows the user to select a print mode, and an operation signal is transmitted to the control unit 53 when the user operates the operation panel. And the control part 53 is based on the operation signal transmitted from an operation panel, the signal transmitted from each photo interrupter 52a-52e, and the said table, The 1st motor 42, the 2nd motor 44, and the winding motor 47 The drive of each is controlled.

Next, the operation of the ink jet printer 11 will be described.
(When printing in high-speed printing mode)
When the user operates the operation panel so that printing is started in the high-speed printing mode, a carriage motor (not shown) is driven by the control unit 53, and the carriage 30 reciprocates in the left and right directions in the printing area E (2). Printing is performed by ejecting ink from each nozzle opening (not shown) of the recording head 31 toward the continuous paper 12 supported on the platen 27 while passing (passing). At this time, the control unit 53 stops the first motor 42 for the printing time T1 minutes (6 seconds) based on the above table, and after the printing is completed, the first motor 42 is driven for the conveying time T2 (2 seconds). One nip roller 41 conveys the continuous paper 12 for one printing length downstream. The printed continuous paper 12 is dried while passing through the drying device 34.

  Thereafter, the next printing is performed again. Therefore, the printing cycle in the high-speed printing mode is printing time T1 (6 seconds) + conveyance time T2 (2 seconds) = 8 seconds. Therefore, since the control unit 53 intermittently drives the first motor 42 so as to repeat the 6-second stop and the 2-second drive, the continuous paper 12 is printed by the first nip roller 41 at the printing time T1 (6 seconds) interval ( (Period). In the initial state in which the rotating shaft 46 does not wind up the continuous paper 12 at all, the driven roller 51 is in contact with the peripheral surface 46a of the rotating shaft 46, so that the upper end portion 50a of the second arm 50B contacts the photo interrupter 52a. Sensed.

  Further, simultaneously with the driving of the first motor 42, the control unit 53 continuously conveys the continuous paper 12 downstream at the conveyance speed V1 (98 mm / second) while the second nip roller 43 conveys the rotation shaft 46 at the conveyance speed V1. The second nip roller 43 and the rotating shaft 46 are driven by continuously driving the second motor 44 and the winding motor 47 so that the continuous paper 12 is continuously wound at the same winding speed V2 (98 mm / second). Rotate. At this time, the continuous paper 12 positioned between the first nip roller 41 and the second nip roller 43 in the conveyance path of the continuous paper 12 and the continuous paper 12 positioned between the second nip roller 43 and the rotation shaft 46 are respectively Since tension is applied by the first tension roller 45 and the second tension roller 48, no slack occurs.

  When the number of times of printing increases and the winding diameter of the continuous paper 12 wound around the rotating shaft 46 increases, the driven roller 51 moves away from the peripheral surface 46a of the rotating shaft 46. Accordingly, the first arm 50A and the second arm 50B swing around the shaft 49. When the winding diameter of the continuous paper 12 increases by the set value A from the initial state, the upper end portion 50a of the second arm 50B is detected by the photo interrupter 52b.

  Here, normally, when the rotary shaft 46 is rotated at a constant speed, the tension applied to the continuous paper 12 decreases as the winding diameter of the continuous paper 12 wound around the rotary shaft 46 increases. . Therefore, when the upper end 50a of the second arm 50B is sensed by the photo interrupter 52b, it is applied to the continuous paper 12 more than when the upper end 50a of the second arm 50B is sensed by the photo interrupter 52a. The tension is small.

  For this reason, the control unit 53 increases the tension applied to the continuous paper 12 by controlling the drive of the winding motor 47 and increasing the rotational torque of the rotary shaft 46. In the present embodiment, (tension applied to the continuous paper 12) = (rotational torque of the rotary shaft 46) ÷ (winding diameter of the continuous paper 12 wound around the rotary shaft 46) holds.

  When the printing is continued and the winding diameter of the continuous paper 12 by the rotating shaft 46 is increased by the set value 2A from the initial state, the upper end portion 50a of the second arm 50B is detected by the photo interrupter 52c. In the state where the upper end portion 50a of the second arm 50B is sensed by the photo interrupter 52c, the tension applied to the continuous paper 12 is greater than when the upper end portion 50a of the second arm 50B is sensed by the photo interrupter 52b. Is getting smaller.

  For this reason, the control unit 53 increases the tension applied to the continuous paper 12 by controlling the drive of the winding motor 47 and increasing the rotational torque of the rotary shaft 46. Similarly, when the winding diameter of the continuous paper 12 by the rotating shaft 46 is increased by the set value 3A from the initial state and when the winding diameter of the continuous paper 12 is increased by the set value 4A from the initial state, the control unit 53 Increases the tension applied to the continuous paper 12 by increasing the rotational torque of the rotary shaft 46 by controlling the drive of the winding motor 47.

  That is, the control unit 53 controls the drive of the winding motor 47 to increase the rotational torque of the rotating shaft 46 when the winding diameter of the continuous paper 12 reaches the equivariable change point, thereby increasing the rotational torque of the rotary shaft 46. Increase the tension applied to the. Therefore, since the rotation torque of the rotating shaft 46 is intermittently increased by the control unit 53 for each difference change point, the tension applied to the continuous paper 12 is increased even when the winding diameter of the continuous paper 12 is increased. The amount of change can be kept small. In addition, the continuous paper 12 is wound up by the rotary shaft 46 that winds the continuous paper 12 by continuous rotation, and the continuous paper 12 is provided immediately upstream of the rotary shaft 46 in the conveyance path of the continuous paper 12 and is continuously rotated. The conveyance form of the continuous paper 12 by the second nip roller 43 that conveys the continuous paper 12 is the same.

  Therefore, when the continuous paper 12 is taken up by the rotary shaft 46, the continuous paper 12 is not easily displaced in the front-rear direction (the axial direction of the rotary shaft 46), so that the continuous paper 12 is taken up by the rotary shaft 46 with high accuracy.

(When printing in standard print mode)
When the user operates the operation panel so that printing is started in the standard printing mode, the control unit 53 determines that the printing time T1 (for 4 passes) is 11 seconds and the conveyance time T2 is based on the above table. The driving of the first motor 42, the second motor 44, and the winding motor 47 is controlled so that the conveyance speed V1 is 66 mm / second and the winding speed V2 is 66 mm / second for 2 seconds. Other than this, it is the same as the case of printing in the high-speed print mode described above.

(When printing in clean print mode)
Further, when the user operates the operation panel so that printing is started in the clean printing mode, the control unit 53 determines that the printing time T1 (for 8 passes) is 19 seconds and the conveyance time T2 is based on the above table. The driving of the first motor 42, the second motor 44, and the winding motor 47 is controlled so that the conveyance speed V1 is 42 mm / second and the winding speed V2 is 42 mm / second for 2 seconds. Other than this, it is the same as the case of printing in the high-speed print mode described above.

  Thus, the ink jet printer 11 changes the printing time T1, the conveyance speed V1, and the winding speed V2 according to the printing mode. That is, in the ink jet printer 11, as the printing time T1 (the conveyance stop time of the continuous paper 12 by the first nip roller 41) becomes longer, the continuous speed 12 of the continuous paper 12 by the second nip roller 43 and the rotation shaft 46 continue. The winding speed V2 of the paper 12 is controlled to be slow. Therefore, the slack of the continuous paper 12 being conveyed is suitably suppressed.

According to the embodiment described in detail above, the following effects can be obtained.
(1) The rotating shaft 46 continuously rotates to wind up the continuous paper 12, and the second nip roller 43 provided immediately upstream of the rotating shaft 46 in the conveying path of the continuous paper 12 continuously rotates to continuously feed the continuous paper. 12 is being conveyed. That is, since the rotating shaft 46 and the second nip roller 43 are continuously rotated, the winding form of the continuous paper 12 by the rotating shaft 46 and the conveying form of the continuous paper 12 by the second nip roller 43 are the same. Accordingly, when the continuous paper 12 is taken up by the rotation shaft 46, the continuous paper 12 is not easily displaced in the front-rear direction (the axial direction of the rotation shaft 46). Therefore, the continuous paper 12 conveyed from the second nip roller 43 is rotated by the rotation shaft. 46 can be wound with high accuracy.

  (2) Even if the printing mode is changed, the control unit 53 causes the second nip roller 43 to convey the continuous paper 12 as the printing time T1 (the conveyance stop time of the continuous paper 12 by the first nip roller 41) becomes longer. Since the driving of the second motor 44 and the take-up motor 47 is controlled so that the speed V1 and the take-up speed V2 of the continuous paper 12 by the rotating shaft 46 become slow, the slack of the continuous paper 12 being conveyed is suitably suppressed. can do.

  (3) Normally, when the rotary shaft 46 is rotated at a constant speed, the tension applied to the continuous paper 12 decreases as the winding diameter of the continuous paper 12 wound around the rotary shaft 46 increases. When the continuous paper 12 is taken up by the rotating shaft 46, the amount of change in tension applied to the continuous paper 12 becomes large. For this reason, the continuous paper 12 is likely to be wound around the rotary shaft 46 in a state of being displaced in the front-rear direction (the axial direction of the rotary shaft 46). In this regard, according to the present embodiment, the control unit 53 continuously increases the rotational torque of the rotating shaft 46 each time the upper end portion 50a of the second arm 50B is sensed sequentially by the photo interrupters 52b to 52e. The tension applied to the paper 12 is increased. For this reason, even if the winding diameter of the continuous paper 12 wound around the rotating shaft 46 increases, the tension applied to the continuous paper 12 can be prevented from changing greatly.

  (4) Each of the photo interrupters 52a to 52e is located at a position corresponding to each moving point of the upper end portion 50a of the second arm 50B when the winding diameter of the continuous paper 12 by the rotating shaft 46 becomes an equivariant change point. Has been placed. Therefore, the winding diameter of the continuous paper 12 by the rotating shaft 46 at that time is measured (detected) depending on which of the photo interrupters 52a to 52e is sensing the upper end portion 50a of the second arm 50B. Can do.

(5) Since the second nip roller 43 conveys the continuous paper 12 to the rotating shaft 46 side while sandwiching the continuous paper 12 from the vertical direction, the continuous paper 12 can be smoothly and reliably conveyed.
In addition, you may change the said embodiment as follows.

  A plastic film may be used as a target instead of the continuous paper 12. In this case, since the plastic film is more likely to bleed than the continuous paper 12, it is necessary to ensure a sufficient drying time after printing. Therefore, when compared in the same printing mode in the table shown in FIG. 5, the number of passes increases, the printing time T1 and the printing cycle become longer, the conveyance speed V1 by the second nip roller 43 and the winding speed V2 by the rotating shaft 46. Is set to be slower.

  -You may make it detect linearly the winding diameter of the continuous paper 12 with an optical sensor. In this way, the tension applied to the continuous paper 12 is substantially increased by linearly increasing the rotational torque of the rotary shaft 46 as the winding diameter of the continuous paper 12 wound around the rotary shaft 46 increases. Can be kept constant.

Instead of the driven roller 51, a sliding member that can slide on the contacted surface 12a may be used as the contact member.
The first arm 50A and the second arm 50B may be integrally formed.

  The first arm 50A and the second arm 50B are not necessarily arranged along the same straight line. That is, the angle formed by the first arm 50A and the second arm 50B may be larger or smaller than 180 degrees as long as these swing ranges can be secured.

The rotational torque of the rotating shaft 46 may be always constant.
-Measuring means may be omitted.
Even if the printing time T1 changes, it is not always necessary to change the conveying speed V1 of the continuous paper 12 by the second nip roller 43 and the winding speed V2 of the continuous paper 12 by the rotating shaft 46.

If the continuous paper 12 can be conveyed, a roller that does not nip the continuous paper 12 may be used instead of the first nip roller 41 and the second nip roller 43.
The first nip roller 41 may be disposed between the conversion roller 28 and the drying device 34 in the conveyance path of the continuous paper 12.

  The winding unit 15 (target conveyance device) may be mounted on a device other than the ink jet printer. For example, the winding unit 15 may be mounted on an apparatus for manufacturing a target such as long paper, woven fabric, non-woven fabric, or plastic film.

1 is a schematic diagram of an ink jet printer according to an embodiment. The principal part enlarged view of the winding-up part of the printer. FIG. 3 is a schematic diagram showing a state when the photo interrupter of the printer senses the upper end of a second arm. FIG. 2 is a block diagram showing an electrical configuration of the printer. A table indicating the print mode.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Inkjet printer as a recording apparatus, 12 ... Continuous paper as a target, 15 ... Winding part which comprises the target conveying apparatus as a conveying means, 31 ... Recording head as a recording means, 41 ... First conveying means First nip roller constituting 42, first motor constituting first conveying means, 43, second nip roller constituting second conveying means, 44, second motor constituting second conveying means, 46, winding means , 47... Winding motor constituting the winding means, 49... Shaft constituting the measuring means, 50 a... Upper end portion 50 a of the second arm 50 B as a sensed part, 50 A. First arm, 50B, second arm constituting measuring means, 51, driven roller as a contact member constituting measuring means, 52a to 52e, sensor constituting measuring means Photo-interrupter as.

Claims (3)

First conveying means for intermittently conveying a long target from the upstream side to the downstream side; and winding means for continuously winding the target intermittently conveyed by the first conveying means on the downstream side; In the target transport device with
A second conveying means for continuously conveying the target conveyed from the first conveying means side to the winding means side between the first conveying means and the winding means in the conveying path of the target; Provided ,
And a control means for controlling driving of the first transport means, the second transport means, and the winding means,
The control means changes the target conveyance speed by the second conveyance means and the winding speed of the target by the winding means in accordance with the conveyance stop time of the target by the first conveyance means,
Furthermore, the measuring means for measuring the winding diameter of the target in a state wound by the winding means,
The winding means has a rotating shaft for winding the target by rotating;
The control means changes the rotational torque of the rotary shaft according to the measurement result of the measurement means,
The measuring means includes
An axis disposed within the range of the rotation axis above the rotation axis;
A first arm that is swingably supported by the shaft;
A second arm that swings in conjunction with the swing of the first arm;
An abutting member that is supported by the first arm and abuts from the side by its own weight on a radially outer surface of the rotating shaft in the target wound by the rotating shaft;
A sensed part provided at one end of the second arm, the sensed part moving in response to a change in the winding diameter of the target;
A plurality of sensors for sensing the sensed part at each movement point of the sensed part corresponding to the difference change point of the winding diameter of the target;
Target conveying device, characterized in that it comprises a. The target transport apparatus according to claim 1, wherein the second transport unit includes a pair of rollers that feed the downstream while sandwiching the target. A recording unit that performs a recording process on the target; and a conveying unit that conveys the target recorded by the recording unit;
A recording apparatus comprising the target conveying device according to claim 1 or 2 .

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