WO2014123069A1 - Dispositif de séchage de papier et dispositif d'impression à jet d'encre - Google Patents

Dispositif de séchage de papier et dispositif d'impression à jet d'encre Download PDF

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Publication number
WO2014123069A1
WO2014123069A1 PCT/JP2014/052261 JP2014052261W WO2014123069A1 WO 2014123069 A1 WO2014123069 A1 WO 2014123069A1 JP 2014052261 W JP2014052261 W JP 2014052261W WO 2014123069 A1 WO2014123069 A1 WO 2014123069A1
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WO
WIPO (PCT)
Prior art keywords
paper
unit
drying
tip
guide
Prior art date
Application number
PCT/JP2014/052261
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English (en)
Japanese (ja)
Inventor
輝 池田
Original Assignee
富士フイルム株式会社
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Publication of WO2014123069A1 publication Critical patent/WO2014123069A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/0015—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing
    • B41J11/002—Curing or drying the ink on the copy materials, e.g. by heating or irradiating
    • B41J11/0021—Curing or drying the ink on the copy materials, e.g. by heating or irradiating using irradiation
    • B41J11/00214—Curing or drying the ink on the copy materials, e.g. by heating or irradiating using irradiation using UV radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/0015—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing
    • B41J11/002—Curing or drying the ink on the copy materials, e.g. by heating or irradiating
    • B41J11/0021—Curing or drying the ink on the copy materials, e.g. by heating or irradiating using irradiation
    • B41J11/00212—Controlling the irradiation means, e.g. image-based controlling of the irradiation zone or control of the duration or intensity of the irradiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/0015—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing
    • B41J11/002—Curing or drying the ink on the copy materials, e.g. by heating or irradiating
    • B41J11/0021—Curing or drying the ink on the copy materials, e.g. by heating or irradiating using irradiation
    • B41J11/00216—Curing or drying the ink on the copy materials, e.g. by heating or irradiating using irradiation using infrared [IR] radiation or microwaves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/0015—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing
    • B41J11/002—Curing or drying the ink on the copy materials, e.g. by heating or irradiating
    • B41J11/0022—Curing or drying the ink on the copy materials, e.g. by heating or irradiating using convection means, e.g. by using a fan for blowing or sucking air
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/0085—Using suction for maintaining printing material flat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/1714—Conditioning of the outside of ink supply systems, e.g. inkjet collector cleaning, ink mist removal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/02—Delivering or advancing articles from machines; Advancing articles to or into piles by mechanical grippers engaging the leading edge only of the articles
    • B65H29/04—Delivering or advancing articles from machines; Advancing articles to or into piles by mechanical grippers engaging the leading edge only of the articles the grippers being carried by endless chains or bands
    • B65H29/041—Delivering or advancing articles from machines; Advancing articles to or into piles by mechanical grippers engaging the leading edge only of the articles the grippers being carried by endless chains or bands and introducing into a pile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/02—Delivering or advancing articles from machines; Advancing articles to or into piles by mechanical grippers engaging the leading edge only of the articles
    • B65H29/04—Delivering or advancing articles from machines; Advancing articles to or into piles by mechanical grippers engaging the leading edge only of the articles the grippers being carried by endless chains or bands
    • B65H29/042—Intermediate conveyors, e.g. transferring devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/52—Stationary guides or smoothers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
    • F26B13/10—Arrangements for feeding, heating or supporting materials; Controlling movement, tension or position of materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J25/00—Actions or mechanisms not otherwise provided for
    • B41J2025/008—Actions or mechanisms not otherwise provided for comprising a plurality of print heads placed around a drum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/50—Auxiliary process performed during handling process
    • B65H2301/53—Auxiliary process performed during handling process for acting on performance of handling machine
    • B65H2301/5305—Cooling parts or areas of handling machine
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2405/00—Parts for holding the handled material
    • B65H2405/50—Gripping means
    • B65H2405/57—Details of the gripping parts
    • B65H2405/572—Retractable parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2406/00—Means using fluid
    • B65H2406/30—Suction means
    • B65H2406/35—Other elements with suction surface, e.g. plate or wall
    • B65H2406/351—Other elements with suction surface, e.g. plate or wall facing the surface of the handled material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2406/00—Means using fluid
    • B65H2406/40—Fluid power drive; Fluid supply elements
    • B65H2406/42—Distribution circuits
    • B65H2406/421—Distribution circuits with means for changing the temperature of the fluid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2515/00—Physical entities not provided for in groups B65H2511/00 or B65H2513/00
    • B65H2515/40—Temperature; Thermal conductivity

Definitions

  • the present invention relates to a paper drying apparatus and an ink jet recording apparatus, and more particularly, to a paper drying apparatus and an ink jet recording apparatus for drying paper transported with a leading end held by a holding means.
  • a chain delivery unit that transports paper on which an image is formed by ink ejected from an inkjet head while holding the leading edge of the paper with a holding means (gripper) provided on the outer peripheral surface and opens the holding means at a paper discharge unit
  • an ink jet recording apparatus comprising:
  • Patent Document 1 the printing unit and the heat and pressure fixing unit are transported by a chain having a gripper, and a hot air ejector is placed in the transport path of the chain, and the back surface of the recording medium is placed at a position facing the transport surface of the chain.
  • An ink jet recording apparatus including a negative pressure suction guide for pressure suction is described.
  • Patent Document 2 describes a printing machine in which the front end of a sheet is held by a gripping rod, the rear end is held by a belt having a suction unit (fan) facing each other, and conveyed to a paper discharge pile. Yes.
  • JP 2009-285877 A Japanese Patent Laid-Open No. 6-211402
  • the present invention has been made in view of such circumstances, and a sheet drying apparatus and an ink jet which can stabilize drying conditions and prevent generation of uneven drying and curling by stabilizing the posture of sheet conveyance.
  • An object is to provide a recording apparatus.
  • the present invention provides a paper drying apparatus that performs drying processing while transporting paper along a transport path, and is attached to an endless chain, and is driven along the transport path by rotating the chain.
  • Traveling tip gripping means for gripping the leading edge of the paper, a suction plate arranged along the transport path at a fixed interval with respect to the chain, and suctioning the back surface of the paper, and slanting from the leading edge of the paper toward the suction plate
  • a paper sheet provided with a leading edge guide that contacts the back surface of the paper sheet that is disposed in the direction and is sucked by the suction plate, and a drying unit that performs a drying process from the front surface of the paper sheet that is transported along the transport path.
  • a drying device is provided.
  • the front end of the paper is gripped by the front end gripping means, the back surface of the paper is sucked by the suction plate, and the region from the front end of the paper to the suction plate by the suction plate is contacted from the back surface of the paper by the front end guide.
  • a drying process is performed by a drying means.
  • the paper gripped by the paper tip gripping means is prevented from being sucked toward the suction plate in a substantially vertical direction from the front edge of the paper, and the paper is conveyed so as to be inclined toward the suction plate. Can keep the state. Therefore, changes in the drying conditions of the entire sheet can be reduced, and drying unevenness and curling can be prevented.
  • the tip guide is preferably attached to the tip gripping means.
  • the tip guide since the tip guide is attached to the tip gripping means, the tip guide is also synchronized with the tip gripping means by conveying the tip gripping means with a chain, It can be moved in contact with the back side of the paper. Therefore, the paper can be stably conveyed in a constant state.
  • a plurality of leading edge gripping means are arranged in a direction orthogonal to the paper transport direction, and the leading edge guides are provided between the leading edge gripping means. Is preferred.
  • the paper drying apparatus includes a plurality of tip gripping means, so that the paper can be stably conveyed.
  • the tip guide is operatively attached to the tip gripping means and can be stored in the tip gripping means.
  • the tip guide since the tip guide is operatively attached to the tip gripping means, the tip guide is unloaded only when the paper is gripped by the tip gripping means, When the sheet is not gripped by the tip gripping means, the tip guide can be stored. Therefore, the tip guide can be prevented from interfering when the tip gripping means is driven by driving the chain.
  • the tip guide operates in an oblique direction from the tip gripping means toward the suction plate.
  • the paper drying apparatus when the paper is transported on the suction plate, the paper is brought into contact with the front end guide carried out from the front end gripping member toward the suction plate from the back side, and the paper is transported. Can be stabilized. Accordingly, since changes in the drying conditions of the paper can be reduced, it is possible to prevent the occurrence of drying unevenness and curling.
  • a sheet drying apparatus includes a first compressed air ejecting unit that pumps the leading end guide, and the first compressed air ejecting unit is provided at a position where the leading end gripping unit starts gripping the sheet. It is preferred that
  • the paper drying apparatus includes the first compressed air ejecting unit, and the leading end guide is unloaded when the leading end gripping unit starts gripping the sheet. At this time, the tip guide can be prevented from interfering.
  • the paper drying apparatus preferably includes a suction plate temperature adjusting means for adjusting the temperature of the suction plate.
  • drying can be promoted by adjusting the temperature of the suction plate by the suction plate temperature adjusting means.
  • the paper drying apparatus preferably includes a temperature adjusting means for adjusting the temperature of the tip guide.
  • the paper drying apparatus it is possible to dry the paper from the back side by adjusting the temperature of the tip guide by the temperature adjusting means. Also, when drying by adjusting the temperature of the suction plate, the area in contact with the tip guide is not heated from the suction plate, but by adjusting the temperature of the tip guide and heating from the tip guide, the paper drying conditions Can be kept constant.
  • the present invention provides an image recording unit having an inkjet head for discharging aqueous ultraviolet curable ink onto a sheet, and drying while conveying the sheet on which an image is recorded by the image recording unit along a conveyance path.
  • a paper drying device as described above that performs processing, a UV irradiation processing unit that performs fixing processing on the paper that has been dried by the paper drying device, and a paper discharge unit that discharges the paper subjected to fixing processing by the UV irradiation processing unit.
  • An ink jet recording apparatus is provided.
  • the present invention generation of uneven drying and curling can be prevented, and the paper after image recording can be efficiently dried. Further, since the drying state can be made the same over the entire surface of the paper, it is possible to prevent the occurrence of uneven fixing.
  • the fixing condition by the UV irradiation processing unit can be performed on the entire surface of the sheet under a certain condition, and thus, occurrence of fixing unevenness can be prevented.
  • the paper discharge unit includes a second compressed air ejecting unit that pumps the tip guide and stores the tip guide in the tip gripping unit.
  • the second discharge unit is provided with the second compressed air ejecting unit, and the leading end guide is housed in the leading end gripping unit.
  • the paper can be discharged without the front end guide getting in the way.
  • the paper drying device and the ink jet recording apparatus of the present invention since the front end guide for guiding the back surface of the paper is provided, the paper from the front end of the paper gripped by the front end gripping means to the suction by the suction plate is guided. can do. Therefore, since the drying by the drying means can be performed on the entire surface of the sheet under the same conditions, it is possible to suppress the occurrence of uneven drying and curling.
  • FIG. 1 is an overall configuration diagram of an ink jet recording apparatus.
  • FIG. 2 is a conceptual diagram showing an example of the adsorption plate temperature adjusting means.
  • FIG. 3 is a conceptual diagram showing another example of the adsorption plate temperature adjusting means.
  • FIG. 4 is a side view showing the configuration of the gripper.
  • FIG. 5 is a plan view showing the configuration of the gripper.
  • FIG. 6 is a diagram illustrating the operating state of the tip guide.
  • FIG. 7 is a plan view showing a state in which the paper is added.
  • FIG. 8 is a diagram for explaining a conventional problem.
  • FIG. 9 is a block diagram of a control system of the ink jet recording apparatus.
  • FIG. 1 is an overall configuration diagram showing an embodiment of an ink jet recording apparatus according to the present invention.
  • the ink jet recording apparatus 10 is an ink jet recording apparatus that records an image by an ink jet method using aqueous UV ink (UV (ultraviolet) curable ink using an aqueous medium) on a sheet of paper (recording medium) P.
  • a paper feeding unit 12 that feeds the paper P
  • a processing liquid application unit 14 that applies a predetermined processing liquid to the surface (image recording surface) of the paper P fed from the paper feeding unit 12, and a processing liquid A processing liquid drying processing unit 16 that performs a drying process on the paper P to which the processing liquid has been applied by the application unit 14, and an inkjet using water-based UV ink on the surface of the paper P that has been subjected to the drying processing by the processing liquid drying processing unit 16.
  • An image recording unit 18 that records an image by a method, an ink drying processing unit 20 that performs drying processing of the paper P on which an image is recorded by the image recording unit 18, and a paper P that has been dried by the ink drying processing unit 20 And UV irradiation section 22 for fixing the image by performing UV irradiation process (fixing process), and a paper discharge section 24 for discharging the paper P UV irradiation treatment with UV irradiation treatment section 22.
  • the sheet feeding unit 12 feeds the sheets P stacked on the sheet feeding table 30 to the processing liquid applying unit 14 one by one.
  • the sheet feeding unit 12 mainly includes a sheet feeding table 30, a suction device 32 (soccer), a pair of sheet feeding rollers 34, a feeder board 36, a front pad 38, and a sheet feeding drum 40.
  • the paper P is placed on the paper feed tray 30 in a bundled state in which a large number of sheets are stacked.
  • the sheet feed table 30 is provided so as to be lifted and lowered by a sheet feed table lifting device (not shown).
  • the drive of the paper feed platform lifting / lowering device is controlled in conjunction with the increase / decrease of the paper P loaded on the paper feed platform 30 so that the paper P positioned at the top of the bundle is always positioned at a constant height. Then, the paper feed table 30 is moved up and down.
  • the paper P as the recording medium is not particularly limited, but general-purpose printing paper used in general offset printing or the like (so-called high-quality paper, coated paper, art paper, and other paper mainly composed of cellulose) can be used. .
  • coated paper is used.
  • the coated paper is one in which a coating layer is provided by coating a coating material on the surface of high-quality paper or neutral paper that is generally not surface-treated.
  • art paper, coated paper, lightweight coated paper, finely coated paper and the like are preferably used.
  • the suction device 32 picks up the sheets P stacked on the sheet feeding table 30 one by one from the top and feeds them to the pair of sheet feeding rollers 34.
  • the suction device 32 includes a suction foot 32A that can be moved up and down and swingable.
  • the suction foot 32A sucks and holds the upper surface of the paper P, and the paper P is fed from the paper feed table 30 to the paper feed roller pair 34.
  • Transport At this time, the suction foot 32A sucks and holds the top surface of the leading end of the paper P positioned at the top of the bundle, pulls up the paper P, and the pair of paper P that forms the pair of paper feeding rollers 34 is formed at the leading end of the paper P that is pulled up. Between the rollers 34A and 34B.
  • the paper feed roller pair 34 includes a pair of upper and lower rollers 34A and 34B that are pressed against each other.
  • One of the pair of upper and lower rollers 34A and 34B is a drive roller (roller 34A) and the other is a driven roller (roller 34B).
  • the drive roller (roller 34A) is driven by a motor (not shown) and rotates.
  • the motor is driven in conjunction with the feeding of the paper P.
  • the motor rotates the driving roller (roller 34A) in accordance with the timing.
  • the sheet P inserted between the pair of upper and lower rollers 34A, 34B is nipped by the rollers 34A, 34B and is sent out in the rotation direction of the rollers 34A, 34B (the installation direction of the feeder board 36).
  • the feeder board 36 is formed corresponding to the paper width, and receives the paper P sent out from the paper feed roller pair 34 and guides it to the front pad 38.
  • the feeder board 36 is installed such that the front end side is inclined downward, and the sheet P placed on the conveyance surface is slid along the conveyance surface and guided to the front pad 38.
  • a plurality of tape feeders 36A for conveying the paper P are installed at intervals in the width direction.
  • the tape feeder 36A is formed in an endless shape, and is driven to rotate by a motor (not shown).
  • the paper P placed on the conveyance surface of the feeder board 36 is fed by the tape feeder 36A and conveyed on the feeder board 36.
  • a retainer 36B and a roller 36C are installed on the feeder board 36.
  • a plurality of retainers 36 ⁇ / b> B are arranged in a longitudinal line along the conveyance surface of the paper P (two in this example).
  • the retainer 36 ⁇ / b> B is configured by a leaf spring having a width corresponding to the sheet width, and is placed in pressure contact with the conveyance surface.
  • the paper P conveyed on the feeder board 36 by the tape feeder 36A passes through the retainer 36B, so that the unevenness is corrected.
  • the retainer 36 ⁇ / b> B is formed by curling the rear end portion so that the paper P can be easily introduced between the retainer 36 ⁇ / b> B and the feeder board 36.
  • the roller 36C is disposed between the front and rear retainers 36B.
  • the roller 36C is placed in pressure contact with the transport surface of the paper P.
  • the sheet P conveyed between the front and rear retainers 36B is conveyed while the upper surface is suppressed by the rollers 36C.
  • the front pad 38 corrects the posture of the paper P.
  • the front pad 38 is formed in a plate shape and is disposed orthogonal to the transport direction of the paper P. Further, it is driven by a motor (not shown) so as to be swingable.
  • the leading edge of the sheet P conveyed on the feeder board 36 is brought into contact with the front pad 38 to correct the posture (so-called skew prevention).
  • the front pad 38 swings in conjunction with the paper feeding to the paper feeding drum 40 and delivers the paper P whose posture has been corrected to the paper feeding drum 40.
  • the paper feed drum 40 receives the paper P fed from the feeder board 36 via the front pad 38 and conveys it to the processing liquid application unit 14.
  • the paper supply drum 40 is formed in a cylindrical shape and is driven to rotate by a motor (not shown).
  • a gripper 40A is provided on the outer peripheral surface of the paper feed drum 40, and the leading edge of the paper P is gripped by the gripper 40A.
  • the paper feed drum 40 conveys the paper P to the treatment liquid application unit 14 while winding the paper P around the peripheral surface by gripping and rotating the front end of the paper P with the gripper 40A.
  • the paper feed unit 12 is configured as described above.
  • the sheets P stacked on the sheet feed table 30 are pulled up one by one from the top by the suction device 32 and fed to the sheet feed roller pair 34.
  • the paper P fed to the paper feed roller pair 34 is fed forward by a pair of upper and lower rollers 34A, 34B constituting the paper feed roller pair 34 and placed on the feeder board 36.
  • the paper P placed on the feeder board 36 is transported by a tape feeder 36 ⁇ / b> A provided on the transport surface of the feeder board 36.
  • the retainer 36B is pressed against the transport surface of the feeder board 36 in the transport process, and the unevenness is corrected.
  • the sheet P conveyed by the feeder board 36 has its leading end brought into contact with the front pad 38 to correct the inclination, and is then transferred to the sheet feeding drum 40. Then, it is transported by the paper feed drum 40 to the processing liquid application unit 14.
  • the processing liquid application unit 14 applies a predetermined processing liquid to the surface (image recording surface) of the paper P.
  • the treatment liquid application unit 14 mainly includes a treatment liquid application drum 42 that conveys the paper P, and a treatment liquid application unit 44 that applies a predetermined treatment liquid to the printing surface of the paper P conveyed by the treatment liquid application drum 42. Consists of.
  • the processing liquid application drum 42 receives the paper P from the paper supply drum 40 of the paper supply unit 12 and conveys the paper P to the processing liquid drying processing unit 16.
  • the treatment liquid application drum 42 is formed in a cylindrical shape and is driven to rotate by a motor (not shown).
  • a gripper 42A is provided on the outer peripheral surface of the treatment liquid application drum 42, and the leading edge of the paper P is gripped by the gripper 42A.
  • the processing liquid application drum 42 conveys the paper P to the processing liquid drying processing unit 16 (one rotation) while the paper P is wound around the peripheral surface by gripping and rotating the front end of the paper P with the gripper 42A. To transport one sheet of paper P).
  • the rotation of the processing liquid application drum 42 and the paper supply drum 40 is controlled so that the timing of receiving and delivering the paper P matches each other. That is, it drives so that it may become the same peripheral speed, and it drives so that the position of a mutual gripper may match.
  • the treatment liquid application unit 44 applies the treatment liquid to the surface of the paper P conveyed by the treatment liquid application drum 42 by a roller.
  • the processing liquid application unit 44 mainly applies a coating roller 44A for applying the processing liquid to the paper P, a processing liquid tank 44B for storing the processing liquid, and a processing liquid stored in the processing liquid tank 44B.
  • the pumping roller 44C is installed in pressure contact with the application roller 44A, and partly immersed in the processing liquid stored in the processing liquid tank 44B.
  • the pumping roller 44C measures and pumps the processing liquid, and applies the processing liquid to the peripheral surface of the coating roller 44A with a certain thickness.
  • the application roller 44A is provided corresponding to the paper width, is pressed against the paper P, and applies the treatment liquid applied to the peripheral surface thereof to the paper P.
  • the application roller 44 ⁇ / b> A is driven by a contact / separation mechanism (not shown) and moves between a contact position that contacts the peripheral surface of the treatment liquid application drum 42 and a separation position that separates from the peripheral surface of the treatment liquid application drum 42. To do.
  • the contact / separation mechanism moves the application roller 44 ⁇ / b> A in accordance with the passage timing of the paper P, and applies the treatment liquid onto the surface of the paper P conveyed by the treatment liquid application drum 42.
  • the processing liquid is applied with a roller, but the method of applying the processing liquid is not limited to this.
  • the structure provided using an inkjet head and the structure provided by spraying can also be employ
  • the treatment liquid application unit 14 is configured as described above.
  • the paper P delivered from the paper supply drum 40 of the paper supply unit 12 is received by the processing liquid application drum 42.
  • the treatment liquid applying drum 42 grips the leading end of the paper P with the gripper 42A and rotates, so that the paper P is wound around the peripheral surface and conveyed. In this conveyance process, the application roller 44A is pressed against the surface of the paper P, and the processing liquid is applied to the surface of the paper P.
  • the processing liquid to be applied to the surface of the paper P is applied with a processing liquid having a function of aggregating the coloring material in the aqueous UV ink that is ejected onto the paper P in the subsequent image recording unit 18.
  • the processing liquid drying processing unit 16 performs a drying process on the paper P having a processing liquid applied to the surface.
  • the processing liquid drying processing unit 16 mainly blows hot air onto the printing surface of the processing liquid drying processing drum 46 that transports the paper P, the paper transport guide 48, and the paper P that is transported by the processing liquid drying processing drum 46.
  • a processing liquid drying processing unit 50 for drying is
  • the processing liquid drying processing drum 46 receives the paper P from the processing liquid application drum 42 of the processing liquid application unit 14 and conveys the paper P to the image recording unit 18.
  • the processing liquid drying processing drum 46 is constituted by a frame assembled in a cylindrical shape, and is driven to rotate by a motor (not shown).
  • a gripper 46A is provided on the outer peripheral surface of the processing liquid drying processing drum 46, and the leading edge of the paper P is gripped by the gripper 46A.
  • the treatment liquid drying processing drum 46 conveys the image recording unit 18 and the paper P by gripping and rotating the leading edge of the paper P with the gripper 46A.
  • the treatment liquid drying treatment drum 46 of this example is configured so that the grippers 42A are disposed at two locations on the outer peripheral surface, so that two sheets of paper P can be conveyed by one rotation.
  • the rotation of the processing liquid drying processing drum 46 and the processing liquid application drum 42 is controlled so that the timing of receiving and delivering the paper P is matched. That is, it drives so that it may become the same peripheral speed, and it drives so that the position of a mutual gripper may match.
  • the paper transport guide 48 is arranged along the transport path of the paper P by the processing liquid drying processing drum 46 and guides the transport of the paper P.
  • the processing liquid drying processing unit 50 is installed inside the processing liquid drying processing drum 46 and performs drying processing by blowing hot air toward the surface of the paper P conveyed by the processing liquid drying processing drum 46.
  • the two processing liquid drying processing units 50 are arranged in the processing liquid drying processing drum, and are configured to blow hot air toward the surface of the paper P conveyed by the processing liquid drying processing drum 46. ing.
  • the treatment liquid drying processing unit 16 is configured as described above.
  • the paper P delivered from the processing liquid application drum 42 of the processing liquid application unit 14 is received by the processing liquid drying processing drum 46.
  • the processing liquid drying processing drum 46 conveys the paper P by gripping the leading end of the paper P with the gripper 46 ⁇ / b> A and rotating. At this time, the treatment liquid drying treatment drum 46 conveys the surface of the paper P (the surface coated with the treatment liquid) inward.
  • the paper P is dried by blowing hot air from the processing liquid drying processing unit 50 installed inside the processing liquid drying processing drum 46. That is, the solvent component in the treatment liquid is removed. As a result, an ink aggregation layer is formed on the surface of the paper P.
  • the image recording unit 18 ejects ink droplets of each color of C, M, Y, and K (water-based UV ink) on the printing surface of the paper P, and draws a color image on the printing surface of the paper P.
  • the image recording unit 18 mainly presses the image recording drum 52 that conveys the paper P and the paper P that is conveyed by the image recording drum 52, so that the paper P is brought into close contact with the peripheral surface of the image recording drum 52.
  • a roller 54 inkjet heads 56C, 56M, 56Y, and 56K that discharge ink droplets of C, M, Y, and K colors on the paper P; an inline sensor 58 that reads an image recorded on the paper P; and an ink mist A mist filter 60 to be captured and a drum cooling unit 62 are included.
  • the image recording drum 52 receives the paper P from the processing liquid drying processing drum 46 of the processing liquid drying processing unit 16 and conveys the paper P to the ink drying processing unit 20.
  • the image recording drum 52 is formed in a cylindrical shape and is driven to rotate by a motor (not shown).
  • a gripper 52A is provided on the outer peripheral surface of the image recording drum 52, and the leading edge of the paper P is gripped by the gripper 52A.
  • the image recording drum 52 conveys the paper P to the ink drying processing unit 20 while winding the paper P around the peripheral surface by gripping and rotating the leading edge of the paper P with the gripper 52A.
  • the image recording drum 52 has a plurality of suction holes (not shown) formed in a predetermined pattern on the peripheral surface thereof. The sheet P wound around the peripheral surface of the image recording drum 52 is conveyed while being sucked and held on the peripheral surface of the image recording drum 52 by being sucked from the suction holes. Thereby, the paper P can be conveyed with high flatness.
  • suction from the suction hole acts only within a certain range, and acts between a predetermined suction start position and a predetermined suction end position.
  • the suction start position is set to the installation position of the sheet pressing roller 54
  • the suction end position is set to the downstream side of the installation position of the in-line sensor 58 (for example, set to a position for delivering the sheet to the ink drying processing unit 20). .) That is, at least at the installation position (image recording position) of the inkjet heads 56C, 56M, 56Y, and 56K and the installation position (image reading position) of the inline sensor 58, the paper P is attracted and held on the peripheral surface of the image recording drum 52.
  • the mechanism for attracting and holding the paper P on the peripheral surface of the image recording drum 52 is not limited to the above-described suction method using negative pressure, and a method using electrostatic suction can also be employed.
  • the image recording drum 52 of the present example is configured so that grippers 52A are disposed at two locations on the outer peripheral surface so that two sheets of paper P can be conveyed by one rotation.
  • the rotation of the image recording drum 52 and the processing liquid drying processing drum 46 is controlled so that the timing of receiving and transferring the paper P to each other matches. That is, it drives so that it may become the same peripheral speed, and it drives so that the position of a mutual gripper may match.
  • the paper pressing roller 54 is disposed in the vicinity of the paper receiving position of the image recording drum 52 (the position where the paper P is received from the processing liquid drying processing drum 46).
  • the sheet pressing roller 54 is composed of a rubber roller, and is installed in press contact with the peripheral surface of the image recording drum 52.
  • the paper P transferred from the processing liquid drying processing drum 46 to the image recording drum 52 is nipped by passing through the paper pressing roller 54 and is brought into close contact with the peripheral surface of the image recording drum 52.
  • the four inkjet heads 56C, 56M, 56Y, and 56K are arranged at regular intervals along the transport path of the paper P by the image recording drum 52.
  • the inkjet heads 56 ⁇ / b> C, 56 ⁇ / b> M, 56 ⁇ / b> Y, 56 ⁇ / b> K are constituted by line heads corresponding to the paper width, and are arranged so that the nozzle surface faces the peripheral surface of the image recording drum 52.
  • Each of the inkjet heads 56C, 56M, 56Y, and 56K discharges ink droplets from the nozzle row formed on the nozzle surface toward the image recording drum 52, whereby the paper P transported by the image recording drum 52 is applied. Record an image.
  • water-based UV ink is used as the ink ejected from each of the inkjet heads 56C, 56M, 56Y, and 56K.
  • the aqueous UV ink can be cured by irradiating with ultraviolet rays (UV) after droplet ejection.
  • UV ultraviolet rays
  • the in-line sensor 58 is installed on the downstream side of the rearmost inkjet head 56K with respect to the conveyance direction of the paper P by the image recording drum 52, and reads an image recorded by the inkjet heads 56C, 56M, 56Y, and 56K.
  • the in-line sensor 58 is constituted by, for example, a line scanner, and reads images recorded by the inkjet heads 56C, 56M, 56Y, and 56K from the paper P conveyed by the image recording drum 52.
  • a contact prevention plate 59 is installed in the vicinity of the inline sensor 58 on the downstream side of the inline sensor 58.
  • the contact prevention plate 59 prevents the paper P from coming into contact with the in-line sensor 58 when the paper P is lifted due to a conveyance failure or the like.
  • the mist filter 60 is disposed between the rearmost inkjet head 56K and the inline sensor 58, and sucks air around the image recording drum 52 to capture the ink mist. In this way, by sucking the air around the image recording drum 52 and capturing the ink mist, the ink mist can be prevented from entering the in-line sensor 58 and reading errors can be prevented.
  • the drum cooling unit 62 cools the image recording drum 52 by blowing cold air onto the image recording drum 52.
  • the drum cooling unit 62 mainly includes an air conditioner (not shown) and a duct 62 ⁇ / b> A that blows cool air supplied from the air conditioner onto the peripheral surface of the image recording drum 52.
  • the duct 62 ⁇ / b> A cools the image recording drum 52 by blowing cool air to an area other than the conveyance area of the paper P against the image recording drum 52.
  • the duct 62A blows cold air to the area of the lower half of the image recording drum 52 to record the image.
  • the drum 52 is cooled.
  • the air outlet of the duct 62 ⁇ / b> A is formed in an arc shape so as to cover substantially the lower half of the image recording drum 52, and cold air is blown to the region of the substantially lower half of the image recording drum 52. Has been.
  • the temperature for cooling the image recording drum 52 is determined by the relationship with the temperatures of the inkjet heads 56C, 56M, 56Y, and 56K (particularly the temperature of the nozzle surface), and is higher than the temperatures of the inkjet heads 56C, 56M, 56Y, and 56K. It is cooled to a low temperature. Thereby, it is possible to prevent dew condensation from occurring in the inkjet heads 56C, 56M, 56Y and 56K. That is, by making the temperature of the image recording drum 52 lower than that of the inkjet heads 56C, 56M, 56Y, and 56K, condensation can be induced on the image recording drum side, and the condensation that occurs on the inkjet heads 56C, 56M, 56Y, and 56K. (Especially, condensation on the nozzle surface) can be prevented.
  • the image recording unit 18 is configured as described above.
  • the paper P delivered from the processing liquid drying processing drum 46 of the processing liquid drying processing unit 16 is received by the image recording drum 52.
  • the image recording drum 52 conveys the paper P by gripping the leading end of the paper P with the gripper 52A and rotating.
  • the paper P delivered to the image recording drum 52 is first brought into close contact with the peripheral surface of the image recording drum 52 by passing through the paper pressing roller 54. At the same time, it is sucked from the suction holes of the image recording drum 52 and sucked and held on the outer peripheral surface of the image recording drum 52.
  • the sheet P is conveyed in this state and passes through the inkjet heads 56C, 56M, 56Y, and 56K.
  • ink droplets of each color of C, M, Y, and K are ejected from the inkjet heads 56C, 56M, 56Y, and 56K onto the surface, and a color image is drawn on the surface. Since the ink aggregation layer is formed on the surface of the paper P, a high-quality image can be recorded without causing feathering or bleeding.
  • the paper P on which an image is recorded by the inkjet heads 56C, 56M, 56Y, and 56K then passes through the inline sensor 58. Then, an image recorded on the surface when the in-line sensor 58 passes is read. Reading of the recorded image is performed as necessary, and an inspection such as ejection failure is performed from the read image. When reading is performed, reading is performed in a state of being held by suction on the image recording drum 52, so that reading can be performed with high accuracy. Further, since reading is performed immediately after image recording, for example, abnormalities such as ejection failure can be detected immediately, and it is possible to respond quickly. As a result, it is possible to prevent wasteful recording and minimize the occurrence of waste paper.
  • the sheet P is delivered to the ink drying processing unit 20 after the suction is released.
  • the ink drying processing unit 20 (corresponding to a paper drying device) performs a drying process on the paper P after image recording, and removes liquid components remaining on the surface of the paper P.
  • the ink drying processing unit 20 includes a chain gripper 64 that transports the paper P on which an image is recorded, a back tension applying mechanism (corresponding to a suction plate) 66 that applies back tension to the paper P transported by the chain gripper 64, An ink drying processing unit (corresponding to a drying unit) 68 for drying the paper P conveyed by the chain gripper 64 is configured.
  • the chain gripper 64 is a paper transport mechanism commonly used in the ink drying processing unit 20, the UV irradiation processing unit 22, and the paper discharge unit 24.
  • the chain gripper 64 receives the paper P delivered from the image recording unit 18 and discharges it. Transport to paper section 24.
  • the chain gripper 64 mainly includes a first sprocket 64A installed in the vicinity of the image recording drum 52, a second sprocket 64B installed in the paper discharge unit 24, a first sprocket 64A, and a second sprocket 64B.
  • the endless chain 64C is wound around, a plurality of chain guides (not shown) for guiding the running of the chain 64C, and a plurality of grippers 64D attached to the chain 64C at a constant interval.
  • the first sprocket 64 ⁇ / b> A, the second sprocket 64 ⁇ / b> B, the chain 64 ⁇ / b> C, and the chain guide are each configured as a pair, and are disposed on both sides of the paper P in the width direction.
  • the gripper 64D is installed over a chain 64C provided as a pair.
  • the first sprocket 64A is installed close to the image recording drum 52 so that the paper P delivered from the image recording drum 52 can be received by the gripper 64D.
  • the first sprocket 64A is rotatably supported by a bearing (not shown) and is connected to a motor (not shown).
  • the chain 64C wound around the first sprocket 64A and the second sprocket 64B travels by driving this motor.
  • the second sprocket 64B is installed in the paper discharge unit 24 so that the paper P received from the image recording drum 52 can be collected by the paper discharge unit 24. That is, the installation position of the second sprocket 64B is the end of the paper P conveyance path by the chain gripper 64.
  • the second sprocket 64B is pivotally supported by a bearing (not shown) and is rotatably provided.
  • the chain 64C is formed in an endless shape and is wound around the first sprocket 64A and the second sprocket 64B.
  • the chain guide is arranged at a predetermined position and guides the chain 64C to travel along a predetermined path (that is, guides the paper P to travel along a predetermined transport path).
  • a predetermined path that is, guides the paper P to travel along a predetermined transport path.
  • the first sprocket 64A and the second sprocket 64B are arranged at the same height, and the chain 64C is set to run horizontally.
  • a plurality of grippers 64D are attached to the chain 64C at a constant interval.
  • the attachment interval of the gripper 64D is set according to the reception interval of the paper P from the image recording drum 52. That is, the sheet P sequentially delivered from the image recording drum 52 is set in accordance with the reception interval of the sheet P from the image recording drum 52 so that the sheet P can be received from the image recording drum 52 at the same timing.
  • the chain gripper 64 is configured as described above. As described above, when a motor (not shown) connected to the first sprocket 64A is driven, the chain 64C travels. The chain 64C travels at the same speed as the peripheral speed of the image recording drum 52. The timing is adjusted so that the paper P delivered from the image recording drum 52 can be received by each gripper 64D.
  • the back tension applying mechanism 66 applies a back tension to the paper P that is conveyed while its tip is gripped by the chain gripper 64.
  • the back tension applying mechanism 66 mainly includes a guide plate 72 and a suction mechanism (not shown) for sucking air from a suction hole (not shown) formed in the guide plate 72.
  • the guide plate 72 is a hollow box plate having a width corresponding to the paper width.
  • the guide plate 72 is disposed along the transport path (chain travel path) of the paper P by the chain gripper 64. Specifically, it is disposed along the chain 64C and is spaced apart from the chain 64C by a predetermined distance.
  • the sheet P conveyed by the chain gripper 64 has its back surface (the surface on which no image is recorded) sliding on the upper surface of the guide plate 72 (the surface facing the chain 64C: a sliding contact surface). Be transported.
  • a large number of suction holes are formed in a predetermined pattern on the sliding surface (upper surface) of the guide plate 72.
  • the guide plate 72 is formed of a hollow box plate.
  • a suction mechanism (not shown) sucks the hollow portion (inside) of the guide plate 72. As a result, air is sucked from the suction holes formed in the sliding contact surface.
  • the ink drying processing unit 68 is installed inside the chain gripper 64 and performs a drying process on the paper P held and transported by the gripper 64D.
  • the ink drying processing unit 68 includes a hot air unit 68a that performs a drying process by blowing hot air on the surface of the paper P, and an IR unit 68b that performs a drying process by irradiating the surface of the paper P with infrared rays.
  • a plurality of ink drying processing units 68 are arranged along the transport path of the paper P. This number of installations is set according to the processing capacity of the ink drying processing unit 68, the conveyance speed (printing speed) of the paper P, and the like.
  • the guide plate 72 can be provided with temperature adjusting means (corresponding to the adsorption plate temperature adjusting means). Drying can be promoted by providing temperature control means on the guide plate 72 and adjusting the temperature of the guide plate 72 to apply heat also from the back surface of the paper P.
  • a flow path 125A for allowing warm water to pass therethrough is provided in the guide plate 72 as in the example shown in FIG. 2, and the temperature is adjusted by the temperature of the hot water, or as in the example shown in FIG. It can be performed by a known method such as heating the guide plate itself by the heater 125B.
  • the humidity of the ink drying process part 20 rises by performing a drying process. Since the drying process cannot be performed efficiently when the humidity increases, the ink drying processing unit 20 is provided with an exhaust unit together with the ink drying processing unit 68 to forcibly exhaust the humid air generated by the drying process.
  • the exhaust unit may be configured such that an exhaust duct is installed in the ink drying processing unit 20 and the air of the ink drying processing unit 20 is exhausted by the exhaust duct.
  • FIG. 4 is a side view showing the configuration of the gripper 64D
  • FIG. 5 is a plan view of the gripper 64D (a view of FIG. 4 viewed from below).
  • the number of grippers 64D is four, but the number of grippers 64D is not limited as long as the paper P can be stably conveyed.
  • the gripper 64D mainly includes a first gripper shaft 104, a second gripper shaft 106, a first gripper shaft 104, and a second gripper shaft attached to the chain 64C in a direction orthogonal to the chain 64C.
  • the first gripper shaft 104 and the second gripper shaft 106 have connection portions 100 at both ends in the width direction, and are attached to the chain 64C via the connection portions 100.
  • the gripping claws 102 are attached to the first gripper shaft 104 and the second gripper shaft 106, and a plurality of gripping claws 102 are arranged on the straight line orthogonal to the chain 64C at a constant interval. At this time, the gripping claws 102 are arranged so as to be bilaterally symmetric with respect to the center in the width direction of the paper P.
  • the grip claw 102 includes a fixed grip claw 102A and a movable grip claw 102B.
  • the fixed grip claw 102 ⁇ / b> A is fixed to the first gripper shaft 104.
  • the movable gripping claw 102B is rotatably attached to the second gripper shaft 106.
  • the movable gripping claw 102B has a gripping claw opening / closing lever 108. By swinging the gripping claw opening / closing lever 108, the movable gripping claw 102B moves up and down with respect to the fixed gripping claw 102A. The nail 102 opens and closes.
  • the movable gripping claw 102B is biased in a direction to close the gripping claw 102 by a gripping claw opening / closing spring 110 (biased in a direction in which the movable gripping claw 102B is brought into contact with the fixed gripping claw 102A).
  • One end of the gripping claw opening / closing spring 110 is connected to the movable gripping claw 102 ⁇ / b> B, and the other end is connected to a stopper 112 fixedly attached to the second gripper shaft 106.
  • the gripping claw opening / closing spring 110 urges the movable gripping claw 102B and the stopper 112 in a direction away from each other. As a result, the movable gripping claw is biased in the direction in which the gripping claw 102 is closed.
  • a roller 114 is attached to the base end of the gripping claw opening / closing lever 108 of the gripping claw 102.
  • the roller 114 engages with the grip claw opening / closing cam 116 disposed on the travel path of the gripper 64D, and swings the grip claw opening / closing lever 108.
  • the grip claw opening / closing cam 116 is disposed at a position where the paper P is received and a position where the paper P is released. Specifically, the paper P is disposed at a position where the paper P is received from the image recording drum 52 and a position where the paper P is discharged by the paper discharge unit 24.
  • the gripping claw 102 opens and closes, and the paper P can be gripped and released.
  • the gripping claw opening / closing cam 116 rides on the roller 114
  • the gripping claw opening / closing lever 108 resists the biasing force of the gripping claw opening / closing spring 110.
  • the movable gripping claw 102B moves in a direction away from the fixed gripping claw 102A. That is, the gripping claw 102 is opened.
  • the gripping claw opening / closing lever 108 swings in the reverse direction by the biasing force of the gripping claw opening / closing spring 110, and the movable gripping claw 102B approaches the fixed gripping claw 102A. Move in the direction. That is, the gripping claw 102 is closed. In this way, the gripping claws 102 are opened and closed by the action of the cam.
  • the gripper 64 ⁇ / b> D includes a front end guide 118 (a front end guide) that guides the front end of the paper P from the back surface between the gripping claws 102.
  • 6 is a side view showing an initial state (portion (a) in FIG. 6) in which the paper P is held by the gripping claws 102 and a state in which the front end guide 118 is operated (portion (b) in FIG. 6). .
  • the tip guide 118 is provided between each of the plurality of gripping claws 102.
  • the leading edge guide 118 includes a leading edge guide body 118a that guides the paper P from the back surface, an auxiliary plate 118b that assists the movement of the leading edge guide body 118a, and a guide shaft 118c that attaches the leading edge guide body 118a to the movable gripping claw 102B. .
  • a tip guide conveying groove 120 is provided on the movable gripping claw 102 ⁇ / b> B of the gripping claw 102.
  • the guide shaft 118c is movably attached to the tip guide conveyance groove 120, so that the tip guide main body 118a can be operated, stored in the gripper 64D (held between the gripping claws 102), and carried out (on the back surface of the paper P). Contact) possible.
  • the tip guide 118 is preferably carried out in an oblique direction toward the guide plate 72. By being carried out in an oblique direction toward the guide plate 72, the sheet P can be guided from the leading end gripped by the gripping claws 102 to the guide plate 72.
  • the auxiliary plate 118b is attached to the tip guide main body 118a, and the auxiliary plate 118b is pushed by applying compressed air to the auxiliary plate 118b, and the tip guide main body 118a is moved.
  • the direction in which compressed air is blown when the distal end guide 118 is carried out is indicated by a portion (a) in FIG. 6, and the direction in which compressed air is blown when stored is indicated by a white arrow in the portion (b) in FIG.
  • the tip guide 118 is accommodated between the grippers 64D in the initial state in which the paper P is gripped and in the state in which the paper P is not gripped, as shown in FIG. 6A.
  • the leading edge guide 118 is carried out, and the back surface of the paper P is guided by the leading edge guide body 118a.
  • FIG. 7 is a plan view of the portion (b) of FIG. 6 viewed from below.
  • FIG. 8 is a diagram for explaining a problem during conventional drying.
  • the gripper 364D includes a gripping claw 102, a fixed gripping claw 102A, a movable gripping claw 102B, a first gripper shaft 104, a second gripper shaft 106, a gripping claw opening / closing lever 108, a gripping claw opening / closing spring 110, It is the same as the stopper 112, the roller 114, and the gripper 64D.
  • the dry state differs between the portion of the paper P that is attracted to the guide plate 72 and the portion that is not attracted to the guide plate 72.
  • uneven drying and curling occur due to different drying conditions.
  • uneven fixing occurs because the drying state is different.
  • the UV irradiation processing unit 22 is also transported in the same state, the UV irradiation conditions for the paper P are different, so that there is a problem that uneven fixing occurs.
  • the guide is provided in the part where the paper P is not attracted to the guide plate 72.
  • the sheet P can be conveyed while being gently inclined in an oblique direction toward the plate 72. That is, it is possible to alleviate the difference between the hot air blowing from the hot air unit 68a and the infrared irradiation state from the IR unit 68b in the entire paper P, and the change in the drying conditions can be reduced. Therefore, the occurrence of uneven drying and curling can be suppressed.
  • the paper P can be transported while being gently inclined in the oblique direction toward the guide plate 72, and therefore the UV irradiation state from the UV irradiation unit 74 in the entire paper P can be changed. Differences can be alleviated and changes in fixing conditions can be reduced.
  • the change in the drying conditions of the paper P is increased by the ink drying processing unit 68, and the carry-out angle of the front end guide 118 and the distance between the gripper 64D and the guide plate 72 are determined within a range where drying unevenness and curl do not occur. Is done.
  • the tip guide 118 is moved by spraying compressed air on the auxiliary plate 118b and pushing the auxiliary plate 118b.
  • Compressed air injection nozzles 122 (corresponding to compressed air injection means) 122 are provided in front of and behind the guide plate 72 in the paper P transport direction in FIG.
  • the compressed air injection nozzle 122 provided in front of the guide plate 72 the leading end guide 118 is carried out immediately after the paper P is held by the gripping claws 102, that is, immediately after the gripping is started.
  • the compressed air injection nozzle 122 provided after the guide plate 72 accommodates the leading end guide 118 immediately before the paper P is released by the paper discharge unit 24.
  • the paper P can be easily held by the gripping claws 102. Further, by storing the leading end guide 118 before the paper P is released by the paper discharge unit 24, the paper P can be discharged smoothly.
  • the temperature of the leading end guide 118 When adjusting the temperature in the guide plate 72, it is preferable to adjust the temperature of the leading end guide 118 because the temperature of the area of the sheet P guided by the leading end guide 118 is not adjusted from the back side of the sheet P.
  • the temperature of the tip guide 118 is adjusted by a temperature adjustment unit (corresponding to temperature adjustment means) 124 provided in a path on the opposite side of the guide plate 72 of the travel path of the chain gripper 64. That is, the temperature of the front end guide 118 is adjusted while the paper P is not held by the gripper 64D.
  • the temperature control unit 124 includes a tip guide temperature control IR lamp 124a that heats the tip guide 118, and a tip guide cooling fan 124b that cools the tip guide 118.
  • a sensor (not shown) for measuring the temperature of the front end guide 118 immediately before receiving the paper P from the image recording drum 52 by the gripper 64D may be provided. By detecting the temperature with the sensor and controlling the tip guide temperature adjustment IR lamp 124a and the tip guide cooling fan 124b, the optimum temperature can be obtained.
  • the tip guide 118 is temperature-adjusted by the temperature adjustment unit 124 and needs to hold heat up to the paper discharge unit 24. Therefore, it is preferable to use a material that easily holds heat, such as metal.
  • the ink drying processing unit 20 is configured as described above.
  • the paper P delivered from the image recording drum 52 of the image recording unit 18 is received by the chain gripper 64.
  • the chain gripper 64 grips the leading end of the paper P with the gripper 64 ⁇ / b> D and transports the paper P along the planar guide plate 72.
  • the leading edge guide 118 is carried out.
  • the leading edge of the paper P is gripped by the gripper 64D, and the portion from the leading edge of the paper P to the suction by the guide plate 72 is guided by the leading edge guide 118.
  • the back tension of the back surface of the paper P is given by the suction mechanism of the guide plate 72.
  • the drying process is performed by the ink drying processing unit 68 installed in the chain gripper 64, so that drying unevenness and curling are suppressed, and certain drying conditions are maintained. Can be dried.
  • the UV irradiation processing unit 22 irradiates the image recorded using the aqueous UV ink with ultraviolet rays (UV) to fix the image.
  • the UV irradiation processing unit 22 mainly includes a chain gripper 64 that transports the dried paper P, a back tension applying mechanism 66 that applies back tension to the paper P transported by the chain gripper 64, and a chain gripper 64. It comprises a UV irradiation unit 74 that irradiates the conveyed paper P with ultraviolet rays.
  • the chain gripper 64 and the back tension applying mechanism 66 are used in common with the ink drying processing unit 20 and the paper discharge unit 24. That is, in the UV irradiation processing unit 22, as with the ink drying processing unit 20, when transported by the chain gripper 64, the leading edge of the paper P is gripped by the gripper 64 ⁇ / b> D, and the back surface of the paper P includes a back tension applying mechanism 66. A region from the leading end of the paper P to the guide plate 72 is conveyed while being guided by the leading end guide 118. Accordingly, the UV irradiation processing unit 22 can also transport the paper P while gently tilting the paper P toward the guide plate 72 in an oblique direction. Therefore, the UV irradiation from the UV irradiation unit 74 is performed on the entire paper P. The difference in state can be alleviated. Therefore, fixing unevenness can be prevented.
  • the UV irradiation unit 74 is installed inside the chain gripper 64 and irradiates the surface of the paper P with ultraviolet rays.
  • the UV irradiation unit 74 includes an ultraviolet lamp (UV lamp), and a plurality of the UV irradiation units 74 are arranged. Then, ultraviolet rays are irradiated toward the surface of the paper P.
  • the UV irradiation processing unit 22 is configured as described above.
  • the paper P that has been transported to the chain gripper 64 and dried by the ink drying processing unit 20 is then subjected to UV irradiation processing by a UV irradiation unit 74 installed inside the chain gripper 64. That is, ultraviolet rays are irradiated from the UV irradiation unit 74 toward the surface.
  • a portion from the front end of the paper P until the back tension is applied is guided by the front end guide 118.
  • Back tension is applied to the back surface of the paper P by a back tension applying mechanism 66.
  • the sheet P is subjected to UV irradiation processing while being conveyed in such a stable state. Thereby, since the change of fixing conditions can be reduced, fixing unevenness can be prevented.
  • the paper discharge unit 24 collects the paper P on which a series of image recording processing has been performed.
  • the paper discharge unit 24 mainly includes a chain gripper 64 that transports the UV-irradiated paper P and a paper discharge tray 76 that stacks and collects the paper P.
  • the chain gripper 64 is used in common with the ink drying processing unit 20 and the UV irradiation processing unit 22.
  • the chain gripper 64 releases the paper P on the paper discharge tray 76 and stacks the paper P on the paper discharge tray 76.
  • the paper discharge tray 76 stacks and collects the paper P released from the chain gripper 64.
  • the paper discharge tray 76 is provided with a paper pad (a front paper pad, a rear paper pad, a horizontal paper pad, etc.) so that the sheets P are stacked in an orderly manner (not shown).
  • the paper discharge tray 76 is provided so as to be lifted and lowered by a paper discharge tray lifting / lowering device (not shown).
  • the discharge platform lifting device is controlled in conjunction with the increase / decrease of the paper P stacked on the paper discharge tray 76 so that the uppermost paper P is always positioned at a certain height.
  • the paper table 76 is moved up and down.
  • the compressed air jet nozzle 122 sprays the compressed air onto the leading end guide 118, thereby storing the leading end guide 118 between the grippers 64D.
  • the paper P can be stacked on the paper discharge tray 76 without the front end guide 118 interfering.
  • FIG. 9 is a block diagram showing a schematic configuration of a control system of the inkjet recording apparatus 10 of the present embodiment.
  • the inkjet recording apparatus 10 includes a system controller 200, a communication unit 202, an image memory 204, a conveyance control unit 210, a paper feed control unit 212, a processing liquid application control unit 214, a processing liquid drying control unit 216, An image recording control unit 218, an ink drying control unit 220, a UV irradiation control unit 222, a paper discharge control unit 224, an operation unit 230, a display unit 232, and the like are provided.
  • the system controller 200 functions as a control unit that performs overall control of each unit of the inkjet recording apparatus 10 and also functions as a calculation unit that performs various calculation processes.
  • the system controller 200 includes a CPU, a ROM, a RAM, and the like, and operates according to a predetermined control program.
  • the ROM stores a control program to be executed by the system controller 200 and various data necessary for control.
  • the communication unit 202 includes a required communication interface, and transmits / receives data to / from a host computer connected to the communication interface.
  • the image memory 204 functions as a temporary storage unit for various data including image data, and data is read and written through the system controller 200. Image data captured from the host computer via the communication unit 202 is stored in the image memory 204.
  • the conveyance control unit 210 controls the conveyance system of the paper P in the inkjet recording apparatus 10. That is, the tape feeder 36A, the front pad 38, and the paper feed drum 40 in the paper feed unit 12 are controlled to be driven, and the treatment liquid application drum 42 in the treatment liquid application unit 14 and the treatment liquid drying treatment drum in the treatment liquid drying processing unit 16 are controlled. 46, controls the drive of the image recording drum 52 in the image recording unit 18. Further, the driving of the chain gripper 64, the back tension applying mechanism 66, and the compressed air jet nozzle 122 that are used in common by the ink drying processing unit 20, the UV irradiation processing unit 22, and the paper discharge unit 24 is controlled.
  • the transport control unit 210 controls the transport system in accordance with a command from the system controller 200 so that the paper P is transported without delay from the paper feed unit 12 to the paper discharge unit 24.
  • the paper feed control unit 212 controls the paper feed unit 12 in accordance with a command from the system controller 200. Specifically, the driving of the suction device 32 and the paper feed table raising / lowering mechanism is controlled so that the sheets P stacked on the paper feed table 30 are sequentially fed one by one without overlapping.
  • the treatment liquid application control unit 214 controls the treatment liquid application unit 14 according to a command from the system controller 200. Specifically, the drive of the treatment liquid application unit 44 is controlled so that the treatment liquid is applied to the paper P conveyed by the treatment liquid application drum 42.
  • the processing liquid drying control unit 216 controls the processing liquid drying processing unit 16 in accordance with a command from the system controller 200. Specifically, the drive of the processing liquid drying processing unit 50 is controlled so that the paper P conveyed by the processing liquid drying processing drum 46 is dried.
  • the image recording control unit 218 controls the image recording unit 18 in accordance with a command from the system controller 200. Specifically, the drive of the inkjet heads 56C, 56M, 56Y, and 56K is controlled so that a predetermined image is recorded on the paper P conveyed by the image recording drum 52. Further, the operation of the inline sensor 58 is controlled so that the recorded image is read.
  • the ink drying control unit 220 controls the ink drying processing unit 20 in accordance with a command from the system controller 200. Specifically, the drive of the ink drying processing unit 68 is controlled so that hot air is blown to the paper P conveyed by the chain gripper 64.
  • the UV irradiation control unit 222 controls the UV irradiation processing unit 22 according to a command from the system controller 200. Specifically, the drive of the UV irradiation unit 74 is controlled so that the paper P conveyed by the chain gripper 64 is irradiated with ultraviolet rays.
  • the paper discharge control unit 224 controls the paper discharge unit 24 in accordance with a command from the system controller 200. Specifically, the drive of the paper discharge table lifting mechanism is controlled so that the paper P is stacked on the paper discharge table 76.
  • the operation unit 230 includes necessary operation means (for example, operation buttons, a keyboard, a touch panel, etc.), and outputs operation information input from the operation means to the system controller 200.
  • the system controller 200 executes various processes in accordance with the operation information input from the operation unit 230.
  • the display unit 232 includes a required display device (for example, an LCD panel or the like), and displays required information on the display device in accordance with a command from the system controller 200.
  • a required display device for example, an LCD panel or the like
  • the image data to be recorded on the paper is taken into the inkjet recording apparatus 10 from the host computer via the communication unit 202.
  • the captured image data is stored in the image memory 204.
  • the system controller 200 performs necessary signal processing on the image data stored in the image memory 204 to generate dot data. Then, the drive of each inkjet head 56C, 56M, 56Y, 56K of the image recording unit 18 is controlled according to the generated dot data, and the image represented by the image data is recorded on the paper.
  • the dot data is generally generated by performing color conversion processing and halftone processing on image data.
  • the color conversion process is a process of converting image data expressed in sRGB or the like (for example, RGB 8-bit image data) into ink amount data of each color of ink used in the inkjet recording apparatus 10 (in this example, C, It is converted into ink amount data for each color of M, Y, and K.)
  • the halftone process is a process of converting the ink amount data of each color generated by the color conversion process into dot data of each color by a process such as error diffusion.
  • the system controller 200 performs color conversion processing and halftone processing on the image data to generate dot data for each color. Then, according to the generated dot data of each color, the drive of the corresponding ink jet head is controlled to record the image represented by the image data on the paper.

Abstract

Un mode de réalisation de la présente invention porte sur un dispositif de séchage de papier (20) et sur un dispositif d'impression à jet d'encre (10), lequel dispositif de séchage de papier (20) sèche un papier (P) pendant le transport du papier le long d'une trajectoire de transport, et lequel comporte ce qui suit : un moyen de saisie de bord avant (102) qui est fixé à une chaîne sans fin (64C), qui se déplace le long de la trajectoire de transport du fait que la chaîne (64C) est entraînée en rotation, et qui saisisse l'extrémité avant du papier (P) ; une plaque d'aspiration (66) qui est disposée le long de la trajectoire de transport, avec un espace fixe entre elle-même et la chaîne (64C), et qui aspire la surface arrière du papier ; un guide d'extrémité avant (118) qui est en contact avec la surface arrière du papier (P) jusqu'à ce que la surface arrière soit aspirée par la plaque d'aspiration (66) à partir de l'extrémité avant du papier ; et un moyen de séchage (68) qui sèche, à partir du côté avant du papier (P), le papier transporté le long de la trajectoire de transport. Du fait de cette configuration, par la stabilisation de la posture de transport du papier, les conditions de séchage peuvent être stabilisées et l'apparition d'un séchage irrégulier et d'une ondulation peut être empêchée.
PCT/JP2014/052261 2013-02-07 2014-01-31 Dispositif de séchage de papier et dispositif d'impression à jet d'encre WO2014123069A1 (fr)

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JP2013-022117 2013-02-07
JP2013022117A JP2014151520A (ja) 2013-02-07 2013-02-07 用紙乾燥装置及びインクジェット記録装置

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CN106839711A (zh) * 2017-01-23 2017-06-13 广州能之原科技股份有限公司 一种隧道式木材单板干燥工艺
CN111389687A (zh) * 2020-04-29 2020-07-10 珠海炫彩科技有限公司 一种uv光油流平快速固化装置
CN113091434A (zh) * 2021-03-23 2021-07-09 河南晶鑫科技股份有限公司 一种脱水网拉幅装置

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JP2005289059A (ja) * 2004-04-02 2005-10-20 Heidelberger Druckmas Ag 枚葉紙印刷機
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CN113091434A (zh) * 2021-03-23 2021-07-09 河南晶鑫科技股份有限公司 一种脱水网拉幅装置

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