Patent Publication Number: US-9415615-B2

Title: Printing apparatus and cockle removing method

Description:
BACKGROUND 
     1. Technical Field 
     The present invention relates to a printing apparatus and a cockle removing method. 
     2. Related Art 
     A printing apparatus is known, in which a recording medium such as a fabric wound in a roll shape is unwound and transported and a recording head performs printing (textile-printing) on the transported recording medium. 
     In such a printing apparatus, a problem arises in that, when there is a cockle on a recording medium during printing, the quality of printing deteriorates. 
     In order to solve such a problem, a printing apparatus that includes a cockle stretching mechanism which is configured to have V-shaped (disconnected at the vertex) ribs is disclosed (for example, see JP-A-2002-249976). 
     However, in the printing apparatus in the related art, it is not possible to achieve a sufficient cockle removal effect. Particularly, in the printing apparatus in the related art, a cockle stretching effects is changed due to a type of recording medium or a transport state of a recording medium and thus, it is difficult to take measures with respect to various types of recording media. 
     SUMMARY 
     An advantage of some aspects of the invention is to provide a printing apparatus and a cockle removing method in which it is possible to easily remove a cockle on a recording medium. 
     The advantage is achieved by the following aspects of the invention. 
     Application Example 1 
     According to this application example, there is provided a printing apparatus including: a transport unit that has a fixing unit which holds a part of an elongated recording medium and that transports the recording medium to each fixing unit; a recording unit that discharges ink onto the recording medium and performs recording; and a cockle removing mechanism that removes a cockle on the recording medium when the recording medium is sent toward the fixing unit side. The cockle removing mechanism has a first holding unit that holds one end portion of the recording medium in a lateral direction and a second holding unit that holds the other end portion of the recording medium in the lateral direction. The first holding unit and the second holding unit are configured to apply stress to the recording medium in a separating direction from each other. 
     In this case, it is possible to easily remove a cockle on the recording medium. 
     Application Example 2 
     In the printing apparatus according to the application example, it is preferable that the first holding unit and the second holding unit have a needle shape. 
     In this case, it is possible to more reliably hold the end portion of the recording medium in the lateral direction and thus, it is possible to more easily remove a cockle on the recording medium. 
     Application Example 3 
     In the printing apparatus according to the application example, it is preferable that the first holding unit and the second holding unit have a nipping mechanism; the first holding unit is configured to nip one end portion of the recording medium in the lateral direction and the second holding unit is configured to nip the other end portion of the recording medium in the lateral direction. 
     In this case, it is possible to more reliably hold the end portion of the recording medium in the lateral direction and thus, it is possible to more easily remove a cockle on the recording medium. 
     Application Example 4 
     In the printing apparatus according to the application example, it is preferable that the cockle removing mechanism includes a arcuate member, and the first holding unit and the second holding unit are provided on both end sides of the arcuate member, respectively. 
     In this case, it is possible to more easily remove a cockle on the recording medium. 
     Application Example 5 
     In the printing apparatus according to the application example, it is preferable that a distance adjusting unit that adjusts a distance between the first holding unit and the second holding unit is further included. 
     In this case, it is possible to more efficiently apply the stress toward the outer sides of the recording medium in a lateral direction and thus, it is possible to more easily remove a cockle on the recording medium. 
     Application Example 6 
     In the printing apparatus according to the application example, it is preferable that the stress applied to the recording medium is changed depending on a type of recording medium. 
     In this case, it is possible to more easily remove a cockle on various types of recording media. 
     Application Example 7 
     In the printing apparatus according to the application example, it is preferable that the fixing unit has an endless belt which has an adhesive surface on a side facing the recording medium. 
     In this case, it is possible to stably transport the recording medium by a simple configuration. 
     Application Example 8 
     According to this application example, there is provided a cockle removing method of removing a cockle on an elongated recording medium on which ink is applied and recording is performed during transporting of the recording medium, the method including: applying stress to the outer sides of the recording medium in a lateral direction, with respect to the recording medium. 
     In this case, it is possible to easily remove a cockle on the recording medium. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The invention will be described with reference to the accompanying drawings, wherein like numbers reference like elements. 
         FIG. 1  is a side view schematically illustrating an exemplary embodiment of a printing apparatus according to the invention. 
         FIG. 2  is a side view schematically illustrating a cockle removing mechanism of the printing apparatus in FIG.  1 . 
         FIG. 3  is a cross-sectional view of the cockle removing mechanism in  FIG. 2  when taken along line III-III. 
         FIG. 4  is a plan view of a distance adjusting mechanism (cam mechanism) which is included in the cockle removing mechanism in  FIG. 2 . 
         FIG. 5  is a view schematically illustrating another embodiment of a cockle removing mechanism. 
     
    
    
     DESCRIPTION OF EXEMPLARY EMBODIMENTS 
     Hereinafter, a printing apparatus and a cockle removing method of the invention will be described in detail based on an exemplary embodiment illustrated in the reference drawings. 
     Printing Apparatus 
       FIG. 1  is a side view schematically illustrating an exemplary embodiment of a printing apparatus according to the invention.  FIG. 2  is a side view schematically illustrating a cockle removing mechanism of the printing apparatus in  FIG. 1 .  FIG. 3  is a cross-sectional view of the cockle removing mechanism in  FIG. 2  when taken along line III-III.  FIG. 4  is a plan view of a distance adjusting mechanism (cam mechanism) which is included in the cockle removing mechanism in  FIG. 2 . Hereinafter, for convenience of description, a depth direction from the paper surface in  FIG. 1  is referred to as an “x-axis direction”, a right-left direction is referred to as a “y-axis direction”, and a vertical direction is referred to as a “z-axis direction”. 
     A printing apparatus  1  illustrated in  FIG. 1  prints (textile-prints) a pattern or the like on a fabric (original fabric) which is removed and supplied in a so-called reel-to-reel manner using dedicated dye ink by an ink jet method. In the printing apparatus  1 , a direction (horizontal direction) in which a recording medium W which is a fabric is transported corresponds to the y-axis direction, a direction orthogonal to the y-axis direction corresponds to the x-axis direction, and the perpendicular direction corresponds to the z-axis direction. 
     The printing apparatus  1  includes an unwinding section  2  that unwinds and feeds the recording medium W wound in a roll shape, a cockle removing mechanism  3  that removes a cockle of the unwound recording medium W, an apparatus main body  4  that feeds the unwound recording medium W along a feeding path  11  so as to printing is performed, a printing mechanism section (recording unit)  5  that is disposed on the upper side of the apparatus main body  4  and performs printing on the recording medium W by the ink jet method in cooperation with the apparatus main body  4 , a winding section  6  that winds an collects the recording medium W on which printing is performed by the printing mechanism section  5 , downstream in the feeding direction from the apparatus main body  4 , and a controller (control unit)  12  that controls operations of these sections. In the printing apparatus  1 , a transport mechanism section (transport unit)  13  is configured to have the unwinding section  2 , the cockle removing mechanism  3 , the apparatus main body  4 , and the winding section  6 , and transports the elongated recording medium W in the longitudinal direction, that is, y-axis direction. 
     The apparatus main body  4  includes a main body base  41  that is configured of assembled steel materials, and a medium feeding mechanism  42  that is supported by the main body base  41  and intermittently feeds the recording medium W through belt transport in the y-axis direction. 
     The printing mechanism section  5  includes a carriage unit  51  that has an ink jet head  511  and a head moving mechanism  52  that causes the carriage unit  51  to reciprocate in the x-axis direction. 
     The unwinding section  2  includes an unwinding unit  21  that unwinds the recording medium W and a tensioning unit  22  that causes looseness of the unwound recording medium W to disappear. 
     The winding section  6  includes a winding unit  61  that winds the recording medium W, a slip sheet unit  62  that supplies a slip sheet W′ to the winding unit  61 , and a heater unit  63  that vaporizes a solvent (water) of the dye ink infiltrated into the recording medium W before the recording medium W is wound. These units are configured to be mounted on the winding section base  64 . 
     In the recording medium W (fabric) unwound from the unwinding unit  21 , the looseness disappears by the tensioning unit  22  through stretching and then, the recording medium is fed to the cockle removing mechanism  3 . 
     A cockle on the recording medium W fed to the cockle removing mechanism  3  is removed and then, is fed to the medium feeding mechanism  42 . The recording medium W fed to the medium feeding mechanism  42  is adhered to a surface and is transported on a belt. In this belt transport, the recording medium W is intermittently fed in the y-axis direction (sub-scanning), concurrently the carriage unit  51  reciprocates in the x-axis direction and then, ink discharge from the ink jet head  511  is performed (main scanning). 
     In this manner, after the printing is performed, a printing-finished portion (textile-printing finished portion) of the recording medium W is sent to the winding section  6  from the medium feeding mechanism  42 . In the winding section  6 , the slip sheet W′ is continuously supplied from the slip sheet unit  62  to the recording medium W sent from the medium feeding mechanism  42  and the recording medium W and the slip sheet W′ are superposed and are fed to the heater unit  63 . In the heater unit  63 , the recording medium W is heated along with the slip sheet W′ and the solvent (water) of the dye ink is vaporized. In this manner, the textile-printing finished recording medium W after subjected to a dry treatment is wound around the winding unit  61  along with the slip sheet W′. 
     The unwinding unit  21  includes a pair of right and left (x-axis direction) T-shaped frames  211  fixed to the main body base  41  described above, an unwinding frame  213  that is formed of a plurality of rod-like frames  212  straddling across the pair of T-shaped frames  211 , two unwinding-side rod bases  214  that are slidably supported by the pair of T-shaped frames  211  in the x-axis direction and extend in the x-axis direction, and a pair of unwinding-axis protrusions (feeding roll)  215  which are slidably supported by the two unwinding-side rod bases  214 . A tip portion of each of the unwinding-axis protrusions  215  is formed to have a truncated cone shape, the tip portions of the pair of unwinding-axis protrusions  215  are fitted to unwinding cores of the roll-shaped recording medium W by widthwise closeness to each other corresponding to the width of the recording medium W and horizontally supports the recording medium W. In this support state, the recording medium W is sent toward the medium feeding mechanism  42  (transport belt  424 ) side. 
     The pair of unwinding-axis protrusions  215  are configured to integrally move in a right-left direction (width direction of the recording medium W) by a motor-driven width moving unit  216  via two unwinding-side rod bases  214 . 
     In addition, a motor-driven rotating unit  217  is assembled on one of the pair of unwinding-axis protrusions  215  and the pair of unwinding-axis protrusions  215  are caused to rotate to perform unwinding by the rotating unit  217  such that the recording medium W is unwound. Further, a reflection type optical sensor  23  that detects presence or absence of the recording medium W unwound from the unwinding unit  21  is provided below the unwinding unit  21 . 
     According to the present embodiment, a tension mode in which constant tension is applied to the recording medium W and the recording medium W is unwound and a looseness mode in which tension is as small as possible and unwinding is performed are provided and modes are switched according to a type of recording medium W. The tension mode and the looseness mode are configured to be switchable on an operation screen (not illustrated) provided in the printing mechanism section  5  using a graphical user interface (GUI) button. 
     The tension mode is performed for a normal fabric (recording medium W) having low elasticity as a target and, in this case, for example, the controller  12  configured of a personal computer controls the rotating unit  217  such that predetermined tension is applied to the recording medium W and the recording medium is unwound toward a first roller  225 . To be more specific, the controller  12  controls torque of a motor of the rotating unit  217  and thereby, drives the rotating unit  217  during a feeding operation of the recording medium W by the medium feeding mechanism  42  such that the recording medium W is unwound, and drives the rotating unit  217  during a feeding stop of the recording medium W by the medium feeding mechanism  42  such that the recording medium W is slightly rewound. Accordingly, the recording medium W is fed in a state in which tension is applied to the recording medium W between the unwinding unit  21  and the tensioning unit  22 . 
     The looseness mode is performed for a fabric (recording medium W) having high elasticity such as a stocking, in this case, the controller  12  controls the rotating unit  217  (in  FIG. 1 , the recording medium W on the loosed portion is illustrated in a dashed line) such that the unwound recording medium W is temporarily loose downward and is fed to the tensioning unit  22 . That is, when an amount of looseness of the recording medium W becomes small in response to the feeding operation of the recording medium W by the medium feeding mechanism  42  and optical sensor  23  provided on the lower side of the unwinding unit  21  detects “absence” of the recording medium W, the controller  12  positively drives the rotating unit  217  and the rotating unit  217  rotate so as to unwind the recording medium W and thereby, when the amount of looseness in increased and the optical sensor  23  detects “presence” of the recording medium W, the controller  12  stops the driving of the rotating unit  217 . The recording medium W is fed by the control of the amount of looseness, the recording medium W between the unwinding unit  21  and tensioning unit  22  are appropriately loosened. 
     The tensioning unit  22  includes a pair of right and left (x-axis direction) L-shaped frames  222  fixed to a side frame  422  of the medium feeding mechanism  42 , a looseness removing frame  221  that is formed of a rod frame  223  straddling across the pair of L-shaped frames  222 , and a roller group  224  rotatably supported by both sides of the pair of L-shaped frames  222 . The roller group  224  includes a first roller  225 , a second roller  226 , and a third roller  227  which are disposed in the order from upstream side in the feeding direction so as to bend, at a plurality of places, the feeding path  11  of the recording medium W sent in from the unwinding unit  21 , and is configured to have rollers of which a coefficient of friction is high. 
     The recording medium W unwound from the unwinding unit  21  makes a U-turn or the like at the first roller  225  and reaches the second roller  226  and the third roller  227 . The second roller  226  and the third roller  227  are disposed to be close vertically and are rotatably supported by a pair of bearing units  24  of which both end portions are integrally formed. In addition, the bearing units  24  are rotatably supported by the L-shaped frames  222  and an angle adjusting unit  25  that adjusts vertical disposition angle of the second roller  226  and the third roller  227  are assembled to the bearing unit  24 . 
     The recording medium W that passes the second roller  226  and the third roller  227  has a changed S-shaped path; however, the “S”-shaped curve is changed and adjusted depending on types of recording media and the moderate tension can be applied to each of the recording medium W. Accordingly, the partial looseness or cockle of the recording medium W is removed and is fed to the medium feeding mechanism  42 . It is preferable that the first roller  225 , the second roller  226 , and the third roller  227  have a convex portion such that a component of a force acts toward the outer side from the center. 
     As illustrated in  FIGS. 2 and 3 , the cockle removing mechanism  3  includes a pair of rollers  32 , an endless belt  33  that crosses over the pair of rollers  32 , a plurality of arcuate members  31  fixed to the belt  33 , and a distance adjusting unit  34  that adjusts the distance of both ends of the arcuate member  31 . 
     The endless belt  33  is configured to rotate by following the transport of the recording medium W and is configured so as to rotate in the clockwise direction in  FIG. 2 . 
     The arcuate member  31  has an arcuate shape and includes a first holding unit  311  and a second holding unit  312  on both ends thereof. 
     The first holding unit  311  and the second holding unit  312  have a needle shape. A needle-like tip of the first holding unit  311  punctures the vicinity of one end of the recording medium W and holds the one end of the recording medium W. In addition, a needle-like tip of the second holding unit  312  punctures the vicinity of the other end of the recording medium W and holds the other end of the recording medium W. 
     The distance adjusting unit  34  is provided so as to include positions where the recording medium W comes into contact with the arcuate member  31 . 
     The distance adjusting unit  34  is configured to have a rail  341  and a rail  342 . 
     An space between the rail  341  and the rail  342  are configured to become greater on the side of the lower end (upstream in the movement direction of the arcuate members  31 ) in  FIG. 4 , and to become narrower on the side of the upper end (downstream in the movement direction of the arcuate members  31 ) in  FIG. 4 . 
     The space between the rail  341  and the rail  342  on the upstream side in the movement direction of the arcuate members  31  is configured to be slightly greater than the space between the first holding unit  311  and the second holding unit  312  of the arcuate member  31  in a state in which no load is applied. The space between the rail  341  and the rail  342  on the downstream side in the movement direction of the arcuate member  31  is configured to be slightly narrower than the space between the first holding unit  311  and the second holding unit  312  of the arcuate member  31  in a state in which no load is applied. 
     As employing such a configuration, when the arcuate member  31  passes between the rail  341  and the rail  342 , the space between the first holding unit  311  and the second holding unit  312  becomes narrower by the distance adjusting unit  34 . In a state in which the first holding unit  311  and the second holding unit  312  becomes closer, the first holding unit  311  and the second holding unit  312  come into contact with the recording medium W and hold the vicinities of the end of the recording medium W, respectively. In this state, when the recording medium W is farther transported and passes the arcuate member  31  and the distance adjusting unit, the first holding unit  311  and the second holding unit  312  move in a separating direction from each other because the arcuate member  31  enters into a state in which no load is applied. Accordingly, the stress is applied to the outer sides of the recording medium W in the width direction (lateral direction) and the cockle of the recording medium W is removed. 
     Depending on the type of recording medium W, a material of the arcuate member  31  is changed and the space between the rail  341  and the rail  342  in the vicinity of an exit of the arcuate member  31  is changed. Then, it is possible to change the stress applied to the recording medium W. 
     The medium feeding mechanism  42  includes a main body frame  421  that has a pair of right and left (x-axis direction) side frames  422  mounted and fixed on the main body base  41 , a belt transport unit  423  that is supported by the pair of side frame  422  and has an endless transport belt (endless belt)  424 , and a belt cleaning unit  425  disposed on the lower side from the belt transport unit  423 . In addition, the medium feeding mechanism  42  includes a press roller  426  facing the belt transport unit  423  on the upstream side from the upper side and a separation roller  427  that is disposed obliquely upward with respect to the belt transport unit  423  on the upstream side. 
     The main body frame  421  has the pair of side frames  422  which are configured of thick plate materials and a pair of front and rear (y-axis direction) connection frames  428  that connect the side frame  422  and the main body frame  421  is mounted and fixed to the main body base  41  at a portion of the pair of side frames  422 . In addition, the main body frame  421  has a support frame  429  which is positioned between the pair of connection frames  428 , is coupled with the pair of side frame  422 , and supports the belt cleaning unit  425  described above. In each of the side frames  422 , a notch portion to which the belt transport unit  423  is attached or a notch portion to which the printing mechanism section  5  is attached are appropriately provided, and in addition, an opening is formed, through which the belt cleaning unit  425  is checked. 
     The belt transport unit  423  includes a drive pulley  431  positioned upstream in the transport direction, a driven pulley  432  that is positioned upstream in the feeding direction, and an endless transport belt  424  which is cross-linked between the drive pulley  431  and the driven pulley  432 . In addition, the belt transport unit  423  includes a first guide plate  433  that is positioned around the driven pulley  432  and guides travelling of the transport belt  424 , a second guide plate  434  that is positioned immediately below the printing mechanism section  5  and guides the travelling the transport belt  424 , and a third guide plate  435  that is positioned immediately below the support frame  429 , and guides the travelling of the transport belt  424  rounded to the back side. 
     The first guide plate  433  and the second guide plate  434  cross-links between the pair of side frames  422  in a state of being disposed such that the surfaces are flush (the same horizontal surface) to each other, and thus, function as a part of the main body frame  421 . In addition, the first guide plate  433  guides the (upper) transport belt  424  so as to travel horizontally immediately after the transport belt  424  is separated from the driven pulley  432  and the second guide plate  434  guides the transport belt  424  that is positioned in a printing region such that looseness does not occur on the top side. Thus, the transport belt  424  positioned immediately above the second guide plate  434  functions as a platen. Further, the third guide plate  435  guides the transport belt  424  that receives an upthrust force by the belt cleaning unit  425  so as to be pressed down. The transport belt  424  immediately after (on the lower side) being separated from the drive pulley  431  travels horizontally. That is, the transport belt  424  travels horizontally at a position where cleaning is performed on the belt by the belt cleaning unit  425 . 
     The drive pulley  431  and the driven pulley  432  are rotatably supported by the pair of side frames  422  via a dedicated bearing and a transport motor (motor)  436  that causes the transport belt  424  to intermittently travel is connected to one end of the drive pulley  431  in the axis. 
     An encoder  436   a  is installed in the transport motor  436 . A rotating amount detected by the encoder  436   a  is adjusted and thereby, it is possible to reliably send the transport belt  424  intermittently. In addition, it is possible to reliably detect that the recording medium W is being transported, based on the detected rotating amount, that is, based on whether or not the transport motor  436  rotates. 
     The transport belt  424  is configured of a special wide width belt to have an outer circumferential surface (fixing unit)  424   a , that is, a surface on the side facing the recording medium W is adhesive (adhesive treatment). The outer circumferential surface  424   a  corresponds to the fixing unit that holds an intermediate portion of the recording medium W in the longitudinal direction. The recording medium W is held by the adhesion of the outer circumferential surface  424   a  (fixing unit) and is transported by the transport belt  424  which drives in this state. Accordingly, the recording medium W is intermittently transported immediately below the printing mechanism section  5  without an occurrence of curling or the like and recording is performed by ink discharged from the printing mechanism section  5 . 
     The press roller  426  that presses the recording medium W sent from the cockle removing mechanism  3  to adhere to the transport belt  424  is disposed on the upper side of the driven pulley  432 . The press roller  426  is rotatably supported by tips of a pair of support arms  437  rotatably supported by the side frame  422 . In addition, the press roller  426  has a predetermined elasticity and a self-weight and presses the recording medium W against the transport belt  424  by the self-weight at a position immediately above the driven pulley  432 . That is, the press roller  426  and the driven pulley  432  nip the transport belt  424  and function as nip rollers, and cause the recording medium W to continuously adhere to the travelling transport belt  424 . An air cylinder  438  that rotates the support arms  437  is connected to an intermediate position of each of the support arms  437 . A pair of the air cylinders  438  are synchronously driven and thereby, the press roller  426  is pulled apart from the transport belt  424 . 
     A separation roller  427  that peels the recording medium W from the transport belt  424  after printing and sends the recording medium to the winding section  6  is disposed obliquely upward from the drive pulley  431 . The separation roller  427  is rotatably supported by a pair of sub frames  439  extending from the side frame  422 . In this case, the separation roller  427  relatively peels the recording medium W from the transport belt  424  that circles the drive pulley  431  and rounds to the back side but, in the actual operation, a peeling force from the transport belt  424  varies depending on types of recording media W. Therefore, depending on the types, the peeling is started at a position where the transport belt  424  starts circling and the peeling is performed at a position where the circling is performed to some extent. Here, when the peeling point is rounded to the back side, there is a concern that the recording medium W is caught in the transport belt  424 . 
     According to the present embodiment, an angle of the recording medium W sent from the transport belt  424  and to the separation roller  427  is position-detected, the winding unit  61  is driven to perform winding based on the detection result of the position detection, and the point of peeling is prevented from rounding to the back side of the transport belt  424 . 
     Since yarn waste or dust is attached on the transport belt  424  having adhesiveness, cleaning of the transport belt  424  is regularly performed by the belt cleaning unit  425 . The belt cleaning unit  425  is supported by the support frame  429  on the lower side of the transport belt  424  and extends in the x-axis direction so as to cross the transport belt  424 . Eventually, cleaning solution remaining on the transport belt  424  is wiped with a waste cloth. 
     The printing mechanism section  5  includes a printer frame  53  that extends in the x-axis direction so as to straddle the feeding path  11  (belt transport unit  423 ), a head moving mechanism  52  that is supported by the printer frame  53 , carriage unit  51  that is mounted in the head moving mechanism  52  and reciprocates in the x-axis direction, and a printer cover  54  that covers all the parts. Although not illustrated particularly, the carriage unit or the cleaning unit that maintains the ink jet head  511  are mounted in the printing mechanism section  5 . In the printing mechanism section  5 , since various recording medium W has a thickness thereof and a width, a so-called paper gap (work gap) is adjusted by moving the entire printing mechanism section  5  vertically with respect to the apparatus main body  4  (medium feeding mechanism  42 ). 
     The printer frame  53  includes a beam-like frame  531  formed of a metal plate which extends in the x-axis direction and a pair of standing frames  532  formed of a metal plate which support the beam-like frame  531  by both end portions thereof. The side frame  422  described above is supported by a portion of the pair of standing frames  532 . The printer cover  54  is attached to the printer frame  53 . 
     The carriage unit  51  includes the ink jet head  511  that has a plurality of colors of nozzle rows for a color printer and a carriage  512  that holds the ink jet head  511  so that a nozzle surface faces downwards. The various colors of dye ink supplied to the nozzle rows are supplied from an ink tank of an off-carriage. 
     The head moving mechanism  52  includes a carriage guide  55  that holds the carriage unit  51  by one side and supports the carriage unit  51  so as to be slidable in the x-axis direction, a belt conveying mechanism  56  that causes the carriage guide  55  to reciprocate, and a carriage motor  57  that drives the belt conveying mechanism  56 . The carriage guide  55  is formed of a lower main guide  551  and an upper sub guide  552 . The lower main guide  551  and the upper sub guide  552  are supported by the pair of standing frames  532  at both ends thereof. The belt conveying mechanism  56  includes a timing belt  561  and a part of the timing belt  561  is fixed to the carriage unit  51  (carriage  512 ). 
     When the timing belt  561  is caused to perform forward or reverse travelling by the carriage motor  57 , the carriage unit  51  is guided to the carriage guide  55  and reciprocates in the x-axis direction. The movement position of the carriage guide  55  is detected by a linear encoder and various colors of dye inks are selectively discharged from the ink jet head  511  based on the detection result and print data. Accordingly, the printing (textile-printing) is performed on the recording medium W. 
     The winding section  6  includes the winding section base  64  detachably connected to the main body base  41  in the y-axis direction, the heater unit  63  supported by the upper portion of the winding section base  64 , and the winding unit  61  and the slip sheet unit  62  which are supported by the lower portion of the winding section base  64 . The textile-printed recording medium W may be wound by the following two methods; one method in which the thick recording medium W in which the ink does not permeate to the back surface is wound as is and the other method in which a thin recording medium W in which the ink is likely to permeate to the back surface is wound with the slip sheet W′ which overlaps the recording medium. The winding section  6  according to the present embodiment is designed to be applied to both methods. Hereinafter, the description of employing the latter is provided. 
     The winding section base  64  includes a horizontal upper frame portion  641 , a horizontal lower frame portion  642 , and a perpendicular frame portion  643  to which the horizontal upper frame portion  641  and the horizontal lower frame portion  642  are connected, respectively, and is configured to have extruded aluminum members assembled horizontally and vertically. A portion of the perpendicular frame portion  643  is detachably connected to the main body base  41 . 
     The heater unit  63  includes a radiating plate  631  that has an arc-shaped radiating surface  631   a , a heater  632  that is internally attached to the radiating plate  631 , and a pair of right and left support plates  633  that are provided on the inner right and left ends of the radiating plate  631  and have an elephant trunk shape. In addition, the heater unit  63  (support plates  633 ) is attached to the horizontal upper frame portion  641  by the right and left fixing member  65  provided in the horizontal upper frame portion  641  in a state in which the upper half thereof is mounted on the horizontal upper frame portion  641 . The upper end of the radiating plate  631  approaches the separation roller  427  and is disposed at a slightly lower position than the separation roller  427 . In addition, the upper end of the radiating plate  631  is formed to be bent in a downward arc shape such that the slip sheet W′ guided in from the lower side changes the path. 
     The recording medium W which passed the separation roller  427  is superposed with the slip sheet W′ which is sent from the lower side to the upper end of the radiating plate  631  and is guided to the arc-shaped outer surface (radiating surface  631   a ) of the radiating plate  631  and then, is sent to the lower side. The recording medium W and the slip sheet W′ which come into sliding contact with the radiating surface  631   a  and are sent in the vertical direction are continuously heat by the heater  632 . Through the heating, the solvent (water) of the dye ink infiltrated into the recording medium W evaporates and dye is fixed on the fabric. 
     The slip sheet unit  62  includes a slip sheet roller  621  that unwinds the roll-shaped slip sheet W′ and a guide bar  622  that changes the path of the unwound slip sheet W′ toward the upper end of the radiating plate  631 . The guide bar  622  is fixed to a diagonal member that connects the horizontal lower frame portion  642  to the perpendicular frame portion  643 . In addition, a slip sheet roller  621  is supported on a front section of the horizontal lower frame portion  642  via the pair of bearing units  623  which assembles a control mechanism. The slip sheet W′ is unwound by the pair of bearing units  623  without looseness. 
     Similar to the unwinding unit  21 , the winding unit  61  includes two winding side rod bases  661  that is supported by an intermediate portion in the front-rear direction of the horizontal lower frame portion  642  and extends in the x-axis direction and a pair of winding-axis protrusions  662  slidably supported by the two winding side rod bases  661 . In addition, the winding unit  61  includes a tension roller  663  that is positioned on the feeding path  11  between the lower end of the radiating plate  631  and the pair of winding-axis protrusions  662  and applies tension to the recording medium W and the slip sheet W′. 
     The tip of the winding-axis protrusion  662  is formed to have a truncated cone shape, the tip portions of the pair of winding-axis protrusions  662  are fitted to winding cores around which the recording medium W is wound by widthwise closeness to each other corresponding to the width of the recording medium W and horizontally supports the recording medium W. A motor-driven rotating unit  664  is assembled on one of the pair of winding-axis protrusions  662  and the pair of winding-axis protrusions  662  are caused to rotate and the recording medium W and the slip sheet W′ are wound concurrently. The rotating unit  664  is controlled in the vicinity of the separation roller  427  as described above based on angle detection of the recording medium W which is sent to the separation roller  427 . 
     The tension roller  663  is rotatably supported by tips of a pair of rotation arms  665  rotatably supported by a rear portion of the horizontal lower frame portion  642 . The tension roller  663  comes into rolling contact with t with the slip sheet W′ side of the recording medium W which is wound around the winding core and the slip sheet W′ and biases the recording medium W and the slip sheet W′ by the self-weight thereof downward by rotating. Accordingly, appropriate tension is applied to the recording medium W and the slip sheet W′ and the recording medium W and the slip sheet W′ are wound around the winding cores so as to be tightly wound. 
     The controller  12  is electrically connected to the transport mechanism section  13 , the printing mechanism section  5 , and the like, and has a function of controlling the operations of the sections. 
     As above, the embodiments of the printing apparatus and the cockle removing method of the invention illustrated in the drawings are described; however, the invention is not limited thereto and it is possible to replace components which configures the printing apparatus with components in an arbitrary configuration that can exhibit the same function. In addition, an arbitrary component may be added. 
     In addition, according to the embodiment described above, the cockle removing mechanism is described to include the arcuate member; however, the configuration is not limited thereto and the cockle removing mechanism may have a configuration in which, for example, as illustrated in  FIG. 5 , a member that includes the first holding unit  311  and a member that includes the second holding unit  312  are connected to each other by an elastic member  313  that can be elastic in an arrow direction in the drawing. 
     In addition, according to the embodiments described above, the first holding unit and the second holding unit are described to have a needle shape; however, the configuration is not limited thereto and the first holding unit and the second holding unit may have a shape by which the end of the recording medium in the lateral direction is pinched. 
     The entire disclosure of Japanese Patent Application No. 2014-065413, filed Mar. 27, 2014 is expressly incorporated by reference herein.