WO2011013442A1 - Machine d'impression - Google Patents

Machine d'impression Download PDF

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Publication number
WO2011013442A1
WO2011013442A1 PCT/JP2010/059212 JP2010059212W WO2011013442A1 WO 2011013442 A1 WO2011013442 A1 WO 2011013442A1 JP 2010059212 W JP2010059212 W JP 2010059212W WO 2011013442 A1 WO2011013442 A1 WO 2011013442A1
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WO
WIPO (PCT)
Prior art keywords
printing
paper
cylinder
sheet
unit
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Application number
PCT/JP2010/059212
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English (en)
Japanese (ja)
Inventor
寿彦 濱本
信也 小林
Original Assignee
三菱重工印刷紙工機械株式会社
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Application filed by 三菱重工印刷紙工機械株式会社 filed Critical 三菱重工印刷紙工機械株式会社
Publication of WO2011013442A1 publication Critical patent/WO2011013442A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
    • B41F23/0403—Drying webs
    • B41F23/0406—Drying webs by radiation
    • B41F23/0409—Ultraviolet dryers

Definitions

  • the present invention relates to a printing machine having a drying function for drying ink transferred to a printing sheet.
  • the printing apparatus of the offset sheet-fed printing press includes a paper feeding unit, a printing unit, and a paper discharge unit. Therefore, the print sheets stacked on the paper feed tray are sucked by the paper feed section and sent forward, and after a predetermined printing is performed by the print section, they are stacked on the paper discharge tray by the paper discharge section. The paper is ejected.
  • ink is transferred to the printing surface of the printing sheet in the printing section.
  • a drying device for drying the ink an ultraviolet irradiation device that irradiates ultraviolet rays is used.
  • Patent Document 1 As a drying device for such a sheet-fed printing machine, there is one described in Patent Document 1 below.
  • the first drying apparatus irradiates the storage cylinder with ultraviolet rays and is dried.
  • the second drying device After printing is performed on the other surface of the printing paper, it is configured to be dried by being irradiated with ultraviolet rays by the second drying device in the transport unit.
  • the distance from the printing unit to the ultraviolet irradiation device and the distance from the ultraviolet light source to the printing paper are important, and ensuring high print quality by making this distance an appropriate distance Can do.
  • the second drying device irradiates ultraviolet rays.
  • the ink is then dried and then discharged.
  • the printing paper is particularly susceptible to flapping on the rear end side (paper bottom side) in the transport direction, and the printing paper cannot be properly irradiated with ultraviolet rays. It becomes difficult to ensure high print quality.
  • the present invention solves the above-described problems, and an object of the present invention is to provide a printing machine that improves printing quality.
  • a printing machine is a printing machine in which a paper feeding unit, a printing unit, and a paper discharge unit are arranged in series, and the paper discharge unit prints from a printing cylinder in the printing unit. From the first paper discharge cylinder that can be conveyed while holding the front end of the sheet, the second paper discharge cylinder that can be conveyed while holding the front end of the print sheet from the first paper discharge cylinder, and from the second paper discharge cylinder A transport mechanism capable of holding and transporting the received print sheet; and a paper discharge tray on which the print sheets transported by the transport mechanism are stacked. A drying device for drying the ink that has been irradiated and transferred to the printing sheet is disposed.
  • the printing cylinder is a pressure cylinder that applies a predetermined printing pressure when ink is transferred to a printing sheet, and the pressure cylinder and the second discharge cylinder are preset. It is characterized by being arranged apart by a predetermined distance.
  • the printing machine according to the present invention is characterized in that a sheet holding means is provided to suppress the runaway of the printed sheet conveyed at the ultraviolet irradiation position by the drying device.
  • the sheet holding unit includes an adsorbing unit capable of adsorbing and holding a print sheet from the inside of the second paper discharge cylinder.
  • the printing machine according to the present invention is characterized in that sheet protection means for suppressing contact between the first discharge cylinder and the printing surface of the printing sheet is provided.
  • the sheet protection means includes air injection means capable of injecting air onto the print sheet from the inside of the first discharge cylinder.
  • the sheet protection unit includes a guide member that is spaced apart from the first discharge cylinder by a predetermined distance, and an air injection unit that can closely contact the print sheet with the guide member.
  • a first intermediate cylinder capable of holding and conveying the front end of the printing sheet is held between the front surface printing unit and the back surface printing unit, and the front end of the printing sheet from the first intermediate cylinder is held.
  • a second intermediate cylinder capable of being conveyed, and a drying device for drying the ink transferred to the printing sheet by irradiating ultraviolet rays facing the outer peripheral surface of the second intermediate cylinder. It is a feature.
  • the drying device may include a plurality of ultraviolet irradiation units arranged along the axial direction of the second discharge cylinder or the second intermediate cylinder, and a part of the plurality of ultraviolet irradiation units. And a shutter that can be concealed.
  • the first paper discharge cylinder that can convey the paper sheet, the printing unit, and the paper discharge unit arranged in series and can hold the leading end of the print sheet as the paper discharge unit;
  • a second discharge cylinder capable of holding and conveying the leading edge of the print sheet from the discharge cylinder, a conveyance mechanism capable of holding and conveying the print sheet received from the second discharge cylinder, and the conveyance mechanism
  • a paper discharge tray on which the print sheets are stacked is provided, and a drying device is disposed opposite to the outer peripheral surface of the second paper discharge drum to irradiate the ultraviolet rays and dry the ink transferred to the print sheets.
  • the drying device applies ultraviolet rays to the print sheet on the second discharge cylinder. Since the ink is dried by irradiating the ink, the distance from the printing unit to the drying device and the distance from the drying device to the printing sheet can be set to the optimum distance, and the printing quality can be improved.
  • the printing cylinder is a pressure cylinder that applies a predetermined printing pressure when ink is transferred to the printing sheet, and the pressure cylinder and the second discharge cylinder are set at a predetermined distance. Since the printing sheet with the ink transferred by the printing section is irradiated with ultraviolet rays after a predetermined time, the ink is dried and the ink on the printing sheet becomes smooth during this period, and the gloss is high. Can be secured.
  • the sheet holding unit that suppresses the fluctuation of the printing sheet conveyed to the ultraviolet irradiation position by the drying device.
  • the sheet holding unit suppresses the printing sheet from being violated.
  • the distance from the print sheet can be maintained at an appropriate position, and the contact between the print sheet and the drying device can be prevented to prevent the printing surface from being damaged.
  • the suction unit capable of sucking and holding the print sheet from the inside of the second discharge cylinder is provided, so that high print quality can be ensured with a simple configuration. .
  • the sheet protection means for suppressing the contact between the first paper discharge cylinder and the print surface of the print sheet is provided. By suppressing the contact, damage to the printing surface of the printing sheet can be prevented.
  • the air ejecting means capable of ejecting air from the inside of the first discharge cylinder to the print sheet is provided as the sheet protecting means, high print quality can be ensured with a simple configuration. Can do.
  • the guide member that is separated from the first paper discharge cylinder by a predetermined distance and the air ejection means that can closely contact the print sheet to the guide member are provided. Print quality can be ensured.
  • the first intermediate cylinder capable of holding and conveying the leading end of the printing sheet, and the leading end of the printing sheet from the first intermediate cylinder are retained.
  • a second intermediate cylinder that can be transported, and a drying device that irradiates ultraviolet rays facing the outer peripheral surface of the second intermediate cylinder and dries the ink transferred to the printing sheet.
  • a plurality of ultraviolet irradiation units arranged along the axial direction of the second discharge cylinder or the second intermediate cylinder and a part of the plurality of ultraviolet irradiation units can be concealed as a drying device. Therefore, by adjusting the ultraviolet irradiation area by the ultraviolet irradiation section with the shutter according to the printing area on the printing sheet, the ultraviolet irradiation to the unnecessary area is eliminated, and the ink scattered outside the printing area is solidified. This can prevent contamination of the second paper discharge cylinder and the second intermediate cylinder.
  • FIG. 1 is a schematic configuration diagram illustrating an offset sheet-fed printing press according to a first embodiment of the present invention.
  • FIG. 2 is a schematic diagram illustrating a paper discharge unit of the offset sheet-fed printing press according to the first embodiment.
  • FIG. 3 is a schematic diagram illustrating a sheet discharge cylinder of the offset sheet-fed printing press according to the first embodiment.
  • FIG. 4 is a schematic diagram illustrating a modified example of the sheet discharge cylinder of the offset sheet-fed printing press according to the first embodiment.
  • FIG. 5 is a front view illustrating a drying device of the offset sheet-fed printing press according to the first embodiment.
  • FIG. 6 is a side view illustrating a drying device of the offset sheet-fed printing press according to the first embodiment.
  • FIG. 7 is a front view illustrating a modification of the drying device of the offset sheet-fed printing press according to the first embodiment.
  • FIG. 8 is a side view illustrating a modification of the drying device of the offset sheet-fed printing press according to the first embodiment.
  • FIG. 9 is a schematic configuration diagram illustrating a double-sided offset sheet-fed printing press according to a second embodiment of the present invention.
  • FIG. 10 is a schematic configuration diagram illustrating a double-sided offset sheet-fed printing press according to a third embodiment of the present invention.
  • FIG. 1 is a schematic configuration diagram illustrating an offset sheet-fed printing press according to a first embodiment of the present invention
  • FIG. 2 is a schematic diagram illustrating a paper discharge unit of the offset sheet-fed printing press according to the first embodiment
  • FIG. FIG. 4 is a schematic view showing a discharge cylinder of the offset sheet-fed printing press of Example 1
  • FIG. 4 is a schematic view showing a modification of the discharge drum of the offset sheet-fed printing press of Example 1
  • FIG. FIG. 6 is a side view showing the drying device of the offset sheet-fed printing press of the first embodiment
  • FIG. 7 is the drying device of the offset sheet-fed printing press of the first example.
  • FIG. 8 is a side view illustrating a modification of the drying device of the offset sheet-fed printing press according to the first embodiment.
  • the offset sheet-fed printing machine includes a paper feeding unit 11, a printing unit 12, and a paper discharge unit 13 arranged in series in the conveyance direction of the printing paper (printing sheet) S.
  • a drying device 14 is disposed in the paper discharge unit 13.
  • the printing unit 12 includes five printing units 12a, 12b, 12c, 12d, and 12e.
  • the printing unit 12 uses five colors of ink (for example, cyan, magenta, yellow, black, and gold). Are transferred to the surface of the printing paper S, which is the printing surface, via the plate cylinder and the blanket cylinder for each of the printing units 12a, 12b, 12c, 12d, and 12e. Then, the printing paper S on which the front surface is printed is discharged by the paper discharge unit 13.
  • the ink is an ultraviolet curable ink (UV ink) that dries and solidifies when irradiated with ultraviolet rays.
  • UV ink ultraviolet curable ink
  • the paper discharge unit 13 in the offset sheet-fed printing press conveys the print sheets S printed by the printing unit 12 and stacks them in an aligned state. is there.
  • the paper discharge unit 13 is disposed above the first paper discharge cylinder 21 and the second paper discharge cylinder 22 that can hold and convey the leading edge of the printing paper S, and the second paper discharge cylinders 21 and 22.
  • a chain gripper mechanism (conveying mechanism) 23 capable of holding and conveying the leading end of the printing paper S received from the paper discharging cylinder 22 and a paper discharging tray 24 on which the printing paper S conveyed by the chain gripper mechanism 23 are stacked. is doing.
  • the first paper discharge cylinder 21 is located downstream of the impression cylinder (print cylinder) 20 in the printing unit 12 in the conveyance direction of the print sheet S, and is disposed in contact with the impression cylinder 20.
  • the first paper discharge cylinder 21 can be rotated clockwise in FIG. 2 by a driving device (not shown), and two gripping claws 21a capable of holding the front end portion of the print sheet S on the outer peripheral portion. , 21b are provided at equal intervals in the circumferential direction.
  • the second paper discharge drum 22 is located downstream of the first paper discharge drum 21 in the transport direction of the print sheet S, and is disposed in contact with the first paper discharge drum 21.
  • the second paper discharge drum 22 can be rotated counterclockwise in FIG. 2 by a driving device (not shown), and two gripping claws that can hold the front end of the print sheet S on the outer periphery. 22a and 22b are provided at equal intervals in the circumferential direction.
  • the impression cylinder 20 can be rotated counterclockwise in FIG. 2 by a driving device (not shown), and two gripping claws 20a and 20b capable of holding the front end portion of the print sheet S on the outer peripheral portion. It is provided at equal intervals in the circumferential direction.
  • the pressure drum 20, the first paper discharge drum 21, and the second paper discharge drum 22 are rotatably supported at their shaft ends by a frame (not shown), and the above-mentioned rotation direction is adjusted by the same driving device in accordance with the printing operation. It can be rotated.
  • the pressure drum 20, the first paper discharge cylinder 21, and the second paper discharge cylinder 22 can be rotated in the reverse direction by the driving device according to the type of work.
  • the chain gripper mechanism 23 is arranged so as to be spanned from the second discharge drum 22 to the discharge tray 24 and above it. That is, a first sprocket 25 is supported above the second paper discharge drum 22 so as to be able to rotate, and a second sprocket 26 having a smaller diameter than the first sprocket 25 is rotatably supported above the paper discharge table 24.
  • An endless chain 27 is hung around each sprocket 25, 26.
  • the chain 27 is supported by a chain guide 28, and a plurality of grippers 29 are mounted at predetermined intervals in the longitudinal direction.
  • the gripper 29 has a gripping bar 29a connected to the chain 27, and a claw portion 29b that sandwiches the front end of the printing paper S with the gripping bar 29a. When it comes above 24, the claw part 29b is released.
  • a belt guide mechanism 31 that guides the print sheet S that travels along the transport direction of the print sheet S and is transported by the chain gripper mechanism 23, and a downward airflow above the sheet discharge table 24.
  • the belt guide mechanism 31 is disposed below the chain gripper mechanism 23 and between the second discharge drum 22 and the discharge tray 24.
  • the belt guide mechanism 31 is stretched around a driving roller 41 that can be driven to rotate, a plurality of driven rollers 42 that are rotatably driven by the driving roller 41, and the driving rollers 41 and the plurality of driven rollers 42.
  • an endless belt 43 is provided. It is provided so that it can circulate at the same speed.
  • the fan device 32 has a plurality of fans arranged in a substantially rectangular shape, and presses the printing paper S conveyed by the chain gripper mechanism 23 above the paper discharge tray 24 downward in the vertical direction by an air current.
  • the vacuum suction wheel device 33 is disposed between the belt guide mechanism 31 and the paper discharge table 24, and after the chain gripper mechanism 23 releases the printing paper S, a suction force is applied to the rear end portion of the printing paper S.
  • the printing paper S is braked and the posture is controlled.
  • first discharge cylinder 21, the second discharge cylinder 22, and the chain gripper mechanism 23 are arranged in series from the bottom to the top.
  • the printing paper S printed by the printing unit 12 is in a state where the front end is held by the gripping claws 20a (20b) of the impression cylinder 20 in the printing unit 12e. Then, the paper is conveyed to the paper discharge unit 13.
  • the gripping claw 21 a (21 b) of the first paper discharge cylinder 21 receives and conveys the printing paper S conveyed by the impression cylinder 20, and then the second paper discharge cylinder 22.
  • the gripping claw 22 a (22 b) receives and transports the printing paper S transported by the first paper discharge cylinder 21, and is delivered to the chain gripper mechanism 23.
  • the gripper 29 receives the printing paper S conveyed by the second paper discharge drum 22, and the chain 27 moves while the gripper 29 holds the front end portion of the printing paper S.
  • the printing paper S is transported to the paper discharge tray 24, and the holding of the printing paper S by the gripper 29 is released and stacked on the paper discharge tray 24.
  • the endless belt 43 circulating in the belt guide mechanism 31 travels in the traveling direction along the transport direction of the printing paper S below the chain gripper mechanism 23, so that the front end portion is held by the gripper 29.
  • the printing paper S is supported from below to guide its conveyance.
  • a drying device 14 is disposed so as to dry the ink transferred to the printing paper S by irradiating ultraviolet rays facing the outer peripheral surface of the second paper discharge drum 22. Yes.
  • the drying device 14 is disposed so as to face the second paper discharge cylinder 22 that is disposed at a predetermined distance from the impression cylinder 20. In this case, the predetermined distance is the travel distance of the printing paper S.
  • the drying device 14 is a light emitting diode (LED: Light Emitting Diode) that can irradiate ultraviolet rays (UV: Ultraviolet), and the axial direction of the second discharge cylinder 22 (width direction of the printing paper S). A plurality are arranged along the line.
  • the printing paper S printed by the printing unit 12 is conveyed to the paper discharge unit 13 and reaches the second paper discharge drum 22 from the first paper discharge drum 21, and the second paper discharge drum 22 rotates.
  • ultraviolet light is irradiated to the ink transferred to the printing surface of the printing paper S by the UV-LED of the drying device 14.
  • the blanket cylinder rolls with respect to the printing paper S when the ink supplied by the ink supply device is transferred from the printing cylinder to the surface of the printing paper S through the blanket cylinder. Therefore, when the blanket cylinder is separated from the surface of the printing paper S, the surface of the ink transferred to the surface of the printing paper S becomes uneven.
  • the impression cylinder 20 and the second discharge cylinder 22 (drying device 14) are separated by a predetermined distance. Therefore, while the printing paper S is conveyed from the impression cylinder 20 to the second discharge cylinder 22 by a predetermined distance, the ink on the surface of the printing paper S changes from an uneven shape to a smooth shape due to its fluidity. To do. That is, the printing paper S conveyed from the printing unit 12 to the second paper discharge drum 22 through the first paper discharge drum 21 has a smooth surface on the transferred ink, and in this state, the ink is irradiated with ultraviolet rays. Therefore, the ink on the printing paper S is dried and solidified in a smooth state, and high gloss is ensured.
  • the printing paper S can be sucked and held from the inside of the second paper discharge cylinder 22 as a sheet holding unit that suppresses the fluctuation of the printing paper S conveyed at the ultraviolet irradiation position by the drying device 14.
  • An adsorbing means is provided.
  • air is jetted from the inside of the first paper discharge cylinder 21 to the print paper S as sheet protection means for suppressing contact between the first paper discharge cylinder 21 and the printing surface of the print paper S.
  • Possible air injection means are provided.
  • the sheet protection means may be a guide member that is separated from the first paper discharge cylinder 21 by a predetermined distance and an air injection means that can closely contact the printing paper S with the guide member.
  • each of the suction portions 51, 52, 53, 54 has an arc shape in the circumferential direction along the surface of the second paper discharge drum 22, and is provided over the entire area in the axial direction of the second paper discharge drum 22.
  • the suction units 51 and 52 adsorb the middle portion and the rear end portion in the longitudinal direction of the printing paper S held by the gripping claw 22a, respectively, and the suction units 53 and 54 are printed by the gripping claw 22b.
  • the middle part and the rear end part of the sheet S in the longitudinal direction are adsorbed.
  • Each of the suction portions 51, 52, 53, 54 has a substantially similar configuration, has a hollow shape, and has a number of suction holes on the surface side of the second paper discharge cylinder 22, and each of the connection pipes 51a, 52a. , 53a, 54a to the suction pipe 55.
  • the suction pipe 55 is connected to a pipe of an air suction pump disposed on the frame side (not shown) via a rotary joint.
  • each of the ejection portions 56, 57, 58, and 59 has an arc shape in the circumferential direction along the surface of the first paper discharge drum 21, and is provided over the entire area in the axial direction of the first paper discharge drum 21.
  • the discharge portions 56 and 57 blow up the middle portion and the rear end portion in the longitudinal direction of the printing paper S held by the gripping claws 21a, respectively, and the discharge portions 58 and 59 are held by the gripping claws 21b.
  • the middle portion and the rear end portion of the printing paper S in the longitudinal direction are blown up by air.
  • Each of the discharge portions 56, 57, 58, 59 has substantially the same configuration, has a hollow shape, and has a large number of discharge holes on the surface side of the first discharge cylinder 21, and each of the connection pipes 56a, 57a. , 58a, 59a to the discharge pipe 60.
  • the discharge pipe 60 is connected to a pipe of an air discharge pump disposed on the frame side (not shown) via a rotary joint.
  • a guide member 61 is disposed on the lower side of the first paper discharge cylinder 21 at a position spaced apart from the first paper discharge cylinder 21 by a predetermined distance.
  • the guide member 61 has an arc shape in the circumferential direction along the surface of the first paper discharge cylinder 21 and is provided over the entire area in the axial direction of the first paper discharge cylinder 21.
  • the guide member 61 is an air chamber having a hollow shape.
  • the guide member 61 faces the surface of the first paper discharge cylinder 21 on the inner peripheral surface side, and is downstream of the printing paper S in the first paper discharge cylinder 21. It has many injection holes (air injection means) which injects air toward.
  • the guide member 61 is supported on the frame side (not shown), and is connected to an air pipe 62 from an air pump (not shown). In this case, it is desirable that the first paper discharge drum 21 has a skeleton structure having a cavity on the surface.
  • the print paper S is transferred from the first paper discharge cylinder 21 to the second paper discharge cylinder 22, the print paper S is transferred to the suction portions 51, 52, 53, The air is sucked to the surface of the second paper discharge drum 22 by the air sucked by a number of suction holes 54. Therefore, when the flapping of the printing paper S is suppressed, the printing paper S receives ultraviolet rays at an appropriate distance from the drying device 14, and the printing quality can be improved. Further, the contact between the printing surface of the printing paper S and the drying device 14 is suppressed, so that the printing surface can be prevented from being damaged and the ink is prevented from adhering to the drying device 14.
  • the contact between the printing surface of the printing paper S and the surface of the first paper discharge cylinder 21 is suppressed, so that the ink is prevented from adhering to the first paper discharge cylinder 21 and the deterioration of the print quality is suppressed.
  • the printing quality can be improved by drying the ink by the drying device 14 while the printing paper S is adsorbed to the surface of the second paper discharge drum 22.
  • the housing 71 that is long in the axial direction of the second paper discharge drum 22 has a large number of ultraviolet rays on the front surface facing the surface of the second paper discharge drum 22.
  • a UV-LED (ultraviolet irradiation unit) 72 that can irradiate is fixed.
  • the UV-LEDs 72 are arranged in a line along the axial direction of the second paper discharge drum 22 and correspond to the entire width of the second paper discharge drum 22, that is, the width of the printing paper S being conveyed. Is provided.
  • the housing 71 On both sides of the housing 71, there are provided flat shutters 73 and 74 which are located on the surface side of the housing 71 and are movable along the axial direction of the second paper discharge drum 22.
  • the air cylinders 75 and 76 can be slid, and a part of the plurality of UV-LEDs 72 can be concealed.
  • the shutters 73 and 74 are not limited to this configuration.
  • the housing 81 that is long in the axial direction of the second paper discharge drum 22 has a UV-LED that can irradiate a large number of ultraviolet rays on the front portion facing the surface of the second paper discharge drum 22.
  • An (ultraviolet irradiation unit) 82 is fixed.
  • the UV-LEDs 82 are arranged in a line along the axial direction of the second paper discharge drum 22 and correspond to the entire width of the second paper discharge drum 22, that is, the width of the printing paper S being conveyed. Is provided.
  • box-shaped shutters 83, 84 that fit into the housing 81 and can move along the axial direction of the second paper discharge drum 22.
  • the air cylinders 85 and 86 can be slid, and a part of the plurality of UV-LEDs 82 can be concealed.
  • the shutters 73 and 74 are removed by the air cylinders 75 and 76 (85 and 86). All the UV-LEDs 72 (82) are exposed by sliding in the direction.
  • the unnecessary UV-LEDs 72 are slid inward by the air cylinders 75, 76 (85, 86). 82) is concealed, and a portion of the UV-LED 72 (82) corresponding to the width of the printing paper S is exposed.
  • the unnecessary UV-LED 72 (82) is concealed in accordance with the width of the printing paper S, thereby preventing the ink adhering to the surface of the second paper discharge cylinder 22 from solidifying and easily removing the adhering ink. Thus, the occurrence of a printing failure is prevented.
  • the paper feeding unit 11 supplies the printing paper S one by one at a predetermined interval, and the printing unit 12 is fed from the paper feeding unit 11.
  • Five colors are printed on the supplied printing paper S by the printing units 12a, 12b, 12c, 12d, and 12e. In this case, 1 to 4 color printing may be performed as necessary.
  • the printing paper S printed by the printing unit 12 is conveyed to the paper discharge unit 13. That is, the printing paper S is conveyed from the impression cylinder 20 to the first paper discharge cylinder 21, and is conveyed from the first paper discharge cylinder 21 to the second paper discharge cylinder 22.
  • the drying device 14 irradiates the image (ink) on the surface of the printing paper S conveyed by the rotation of the second paper discharge drum 22 with ultraviolet rays. Then, the image (ink) on the surface of the printing paper S receives ultraviolet rays and is dried and solidified. Thereafter, the printing paper S is transported by the chain gripper mechanism 23 and stacked on the paper discharge tray 24.
  • the printing paper S is conveyed by the paper discharge cylinders 21 and 22, as shown in FIG. 3, the printing paper S is ejected from the ejection portions 56, 57, 58, and 59 in the first paper discharge cylinder 21.
  • the contact between the printing surface of the printing paper S and the surface of the first paper discharge cylinder 21 is suppressed by separating from the surface of the first paper discharge cylinder 21 by the air.
  • air is ejected from the guide member 61 to the print paper S, so that the print paper S follows the guide member 61 according to Bernoulli's theorem.
  • contact between the printing surface of the printing paper S and the surface of the first discharge cylinder 21 is suppressed.
  • the printing paper S is attracted to the surface of the second paper discharge drum 22 by the air sucked through the suction portions 51, 52, 53, 54. As a result, flapping of the printing paper S is suppressed.
  • the rigidity (hardness) of the printing paper S conveyed on the second paper discharge drum 22 varies depending on its thickness and properties, and the amount of fluttering varies depending on this rigidity. In other words, when the rigidity of the printing paper S is higher than the predetermined rigidity, the degree of deformation of the printing paper S is small, so that the rear end portion easily comes into contact with the drying device 14.
  • the suction parts 51, 52, 53, 54 are operated, and when the rigidity of the printing paper S is equal to or lower than the predetermined rigidity, the suction parts 51, 52, 53, 54 are operated. It is desirable to stop.
  • the shutters 73 and 74 are moved according to the width of the printing paper S, and the UV-LED 72 (82) to be exposed is selected. That is, only the UV-LED 72 (82) facing the printing paper S conveyed on the second paper discharge cylinder 22 is exposed and the unnecessary UV-LED 72 (82) is hidden.
  • the paper feeding unit 11, the printing unit 12, and the paper discharge unit 13 are arranged in series, and the paper discharge unit 13 serves as the impression cylinder 20 in the printing unit 12.
  • a drying device 14 is disposed so as to dry the ink transferred to the printing paper S by irradiating ultraviolet rays so as to face the outer peripheral surface of the second paper discharge drum 22.
  • the drying device 14 is placed on the second paper discharge drum 22.
  • the printing paper S is irradiated with ultraviolet rays to dry the ink. Therefore, the distance from the printing unit 12 to the drying device 14 becomes the optimum distance, and the distance from the drying device 14 to the printing paper S becomes the optimum distance, so that the print quality can be improved.
  • the impression cylinder 20 and the second sheet discharge cylinder 22 are arranged apart from each other by a predetermined distance. Therefore, the printing paper S to which the ink is transferred by the printing unit 12 is irradiated with ultraviolet rays after a predetermined time has elapsed, and the ink is dried. Therefore, the surface of the ink of the printing paper S becomes smooth over time due to its fluidity, and the ink is dried and solidified in this smooth state, so that high glossiness can be ensured.
  • the printing paper S is fed from the inside of the second paper discharge cylinder 22 as a sheet holding unit that suppresses the fluctuation of the printing paper S conveyed at the ultraviolet irradiation position by the drying device 14.
  • Suction portions 51, 52, 53, and 54 that can be sucked and held are provided. Therefore, when the printing paper S is conveyed opposite to the drying device 14 in the second paper discharge drum 22, it is sucked and held on the surface of the second paper discharge drum 22 by the suction portions 51, 52, 53, 54.
  • the distance between the drying device 14 and the printing paper S can be maintained at an appropriate position, and contact between the printing paper S and the drying device 14 can be prevented to prevent the printing surface from being printed. Damage can be prevented.
  • the sheet holding means by configuring the sheet holding means by the suction portions 51, 52, 53, and 54, it is possible to ensure high print quality with a simple configuration.
  • the sheet discharge unit 21 is configured to transfer the print sheet S from the inside of the first sheet discharge cylinder 21 as a sheet protection unit that suppresses contact between the first sheet discharge cylinder 21 and the printing surface of the print sheet S.
  • discharge portions 56, 57, 58, 59 capable of injecting air, or a guide member 61 having a large number of injection holes on the inner peripheral surface at a predetermined distance from the first discharge cylinder 21. ing.
  • the printing paper S when the printing paper S is conveyed to the first paper discharge cylinder 21, it is separated from the surface of the first paper discharge cylinder 21 by the discharge portions 56, 57, 58, 59, and the first paper discharge cylinder 21 and the printing are printed.
  • the discharge units 56, 57, 58, 59 or the guide member 61 as the sheet protection means, high print quality can be ensured with a simple configuration.
  • the drying device 14 includes a plurality of UV-LEDs (ultraviolet irradiation units) 72 and 82 arranged along the axial direction of the second discharge cylinder 22 and a plurality of UV-LEDs.
  • Shutters 73, 74, 83, 84 that can conceal part of the UV-LEDs 72, 82 are provided. Therefore, the ultraviolet irradiation area is adjusted by the shutters 73, 74, 83, and 84 according to the printing area on the printing paper S, so that the unnecessary area is not irradiated with the ultraviolet radiation and adhered to the surface of the second paper discharge cylinder 22. Ink solidification can be prevented and contamination of the second paper discharge drum 22 can be suppressed.
  • FIG. 9 is a schematic configuration diagram illustrating a double-sided offset sheet-fed printing press according to a second embodiment of the present invention.
  • symbol is attached
  • the double-sided offset sheet-fed printing machine includes a paper feeding unit 111, a back surface printing unit 112, a front surface printing unit 113, and a paper discharge unit 114.
  • the back surface printing unit 112 and the front surface printing unit 113 are connected in series by the connecting unit 115 between the paper discharge unit 114 and the paper discharge unit 114.
  • the back surface printing unit 112 is configured by five printing units 112a, 112b, 112c, 112d, and 112e
  • the front surface printing unit 113 is configured by printing units 113a, 113b, 113c, 113d, and 113e.
  • the back surface printing unit 112 uses five colors of ink (for example, cyan, magenta, yellow, Black, gold) is transferred to the back surface of the printing paper S, which is the printing surface, via the plate cylinder and the blanket cylinder for each of the printing units 112a, 112b, 112c, 112d, and 112e. Thereafter, the printing paper S printed on the back surface is conveyed to the front surface printing unit 113 by the connecting unit 115.
  • ink for example, cyan, magenta, yellow, Black, gold
  • the front surface printing unit 113 as in the printing process in the back surface printing unit 112 described above, five colors of ink are applied to the printing units 113a, 113b, 113c, 113d, and 113e for each of the plate cylinder and the blanket cylinder. Is transferred to the surface of the printing paper S to be a printing surface. Then, the printing paper S printed on both sides is discharged by the paper discharge unit 114. That is, in this double-sided offset sheet-fed printing press, after printing on the back surface of the printing paper S, printing can be performed on the surface of the printing paper S without inverting the printing paper S.
  • the connecting portion 115 is provided with a first intermediate cylinder 115a, a second intermediate cylinder 115b, and a third intermediate cylinder 115c.
  • the first intermediate cylinder 115a can hold and convey the leading edge of the printing paper S delivered from the impression cylinder of the back surface printing unit 112
  • the second intermediate cylinder 115b is opposed to the first intermediate cylinder 115a.
  • the third intermediate cylinder 115c can be conveyed while being in contact with the second intermediate cylinder 115b and holding the front end of the printing paper S to the front surface printing unit 113. .
  • a drying device 131 is disposed opposite to the outer peripheral surface of the second intermediate cylinder 115b, and below it, the ultraviolet light is irradiated to dry the ink transferred to the printing paper S.
  • the drying device 131 can irradiate the back surface of the printing paper S to which the ink has been transferred by the back surface printing unit 112 with ultraviolet rays, and can dry and solidify the ink on the printing paper S.
  • the paper discharge unit 114 is provided with a first paper discharge drum 21, a second paper discharge drum 22, and a chain gripper mechanism 23.
  • a drying device 14 is disposed so as to face the outer peripheral surface of the second paper discharge drum 22 and to dry the ink transferred to the printing paper S by irradiating ultraviolet rays.
  • the drying device 14 can irradiate the surface of the printing paper S onto which the ink has been transferred by the front surface printing unit 113 with ultraviolet rays, thereby drying and solidifying the ink on the printing paper S.
  • the drying device 131 and the drying device 14 have substantially the same configuration as the drying device 14 of Example 1 described above, and detailed description thereof is omitted. Similarly to the first paper discharge cylinder 21 and the second paper discharge cylinder 22 of the first embodiment, the sheet holding means and the sheet protection are provided for the first intermediate cylinder 115a and the second intermediate cylinder 115b that constitute the connecting portion 115. Means may be provided.
  • the paper feeding unit 111, the back surface printing unit 112, the front surface printing unit 113, and the paper discharge unit 114 are arranged in series, and the back surface printing unit 112 and the front surface printing unit are arranged.
  • a connecting portion 115 is provided between the connecting portion 115 and a drying device 131 for drying the ink transferred to the printing paper S by irradiating ultraviolet rays so as to face the outer peripheral surface of the second intermediate cylinder 115b of the connecting portion 115.
  • a drying device 14 is disposed so as to dry the ink transferred to the printing paper S by irradiating ultraviolet rays facing the outer peripheral surface of the second paper discharge drum 22 of the paper discharge unit 114.
  • the distance from the back surface printing unit 112 to the drying device 131 becomes the optimum distance, and the distance from the front surface printing unit 113 to the drying device 14 becomes the optimum distance, improving the print quality. can do.
  • FIG. 10 is a schematic configuration diagram showing a double-sided offset sheet-fed printing press according to Example 3 of the present invention.
  • symbol is attached
  • the duplex offset sheet-fed printing machine includes a paper feeding unit 211, a back surface printing unit 212, a front surface printing unit 213, and a paper discharge unit 214.
  • the reverse side printing unit 212 and the front side printing unit 213 are connected in series by the reversing unit 215 between the paper output unit 214 and the paper discharge unit 214.
  • the back surface printing unit 212 includes four printing units 212a, 212b, 212c, and 212d
  • the front surface printing unit 213 includes printing units 213a, 213b, 213c, and 213d.
  • the reversing unit 215 reverses the front and back sides and the transport direction of the printing paper S during printing when performing duplex printing, and includes two first and second intermediate cylinders 215a and 215b and a reversing cylinder 215c. It consists of and.
  • the back surface printing unit 212 uses four colors of ink (for example, cyan, magenta, yellow, Black) is transferred to the back surface of the printing paper S, which is the printing surface, through the plate cylinder and the blanket cylinder for each of the printing units 212a, 212b, 212c, and 212d. Thereafter, when the printing sheet S printed on the back surface is transferred from the second intermediate cylinder 215b to the reversing cylinder 215c by the reversing unit 215, the front and back of the printing sheet S and the transport direction are reversed.
  • ink for example, cyan, magenta, yellow, Black
  • the printing paper S printed on the front and back is discharged by the paper discharge unit 214. That is, in this double-sided offset sheet-fed printing machine, after printing on the back surface of the printing paper S, the printing paper S can be reversed and printing can be performed on the surface of the printing paper S.
  • the ink transferred to the printing paper S by irradiating ultraviolet rays is opposed to the outer peripheral surface of the second intermediate cylinder 215b.
  • a drying device 231 for drying is disposed. The drying device 231 can irradiate the back surface of the printing paper S to which the ink has been transferred by the back surface printing unit 213 with ultraviolet rays, and dry and solidify the ink on the printing paper S.
  • the paper discharge unit 214 is provided with a first paper discharge cylinder 21, a second paper discharge cylinder 22, and a chain gripper mechanism 23.
  • a drying device 14 is disposed so as to face the outer peripheral surface of the second paper discharge drum 22 and to dry the ink transferred to the printing paper S by irradiating ultraviolet rays.
  • the drying device 14 can irradiate the surface of the printing paper S on which the ink has been transferred by the surface printing unit 213 with ultraviolet rays, and can dry and solidify the ink on the printing paper S.
  • the drying device 231 and the drying device 14 have substantially the same configuration as the drying device 14 of Example 1 described above, and detailed description thereof is omitted. Further, the first intermediate drum 215a, the second intermediate drum 215b, and the reverse drum 215c constituting the reversing unit 215 hold the sheet similarly to the first paper discharge drum 21 and the second paper discharge drum 22 in the first embodiment. Means and sheet protection means may be provided.
  • the paper feeding unit 211, the back surface printing unit 212, the front surface printing unit 213, and the paper discharge unit 214 are arranged in series, and the back surface printing unit 212 and the front surface printing are arranged.
  • a reversing unit 215 is provided between the reversing unit 213 and a drying device 231 for drying the ink transferred to the printing paper S by irradiating ultraviolet rays so as to face the outer peripheral surface of the second intermediate cylinder 215b of the reversing unit 215.
  • a drying device 14 for drying the ink transferred to the printing paper S by irradiating ultraviolet rays is disposed opposite to the outer peripheral surface of the second paper discharge drum 22 of the paper discharge unit 214.
  • the distance from the back surface printing unit 212 to the drying device 231 is the optimal distance, and the distance from the front surface printing unit 213 to the drying device 14 is the optimal distance.
  • the print quality can be improved.
  • the sheet holding unit of the present invention is the suction unit and the suction unit is the suction units 51, 52, 53, 54.
  • the present invention is not limited to this configuration.
  • the sheet holding unit may hold the print sheet by blowing air from the outer peripheral side of the second paper discharge drum 22.
  • the print sheet may be held not only by air but also by a roller, a belt, or the like.
  • the sheet protection means of the present invention is an air injection means or a guide member, but the present invention is not limited to this configuration. May be used.
  • the shutter of the present invention is configured in a plate shape or a cylindrical shape, but is not limited to this shape, and may be a bellows type, a roll type, or the like.
  • the first discharge cylinder 21 and the second discharge cylinder 22 are provided between the impression cylinder (printing cylinder) 20 and the chain gripper mechanism (conveyance mechanism).
  • the drying device 14 is provided so as to face the outer peripheral surface, it is not limited to this configuration. That is, not only two paper discharge cylinders but also three or more paper discharge cylinders may be provided between the printing cylinder and the transport mechanism depending on the layout and the like.
  • the first to fifth paper discharge cylinders may be provided, and the drying device may be provided after the third paper discharge cylinder.
  • the printing machine according to the present invention is provided with a drying device that irradiates ultraviolet rays facing the outer peripheral surface of the second discharge cylinder to dry the ink transferred to the printing sheet, thereby improving the printing quality. It can be applied to any printing machine.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)

Abstract

L'invention porte sur une machine d'impression, qui comprend une unité d'avance de papier (11), une unité d'impression (12) et une unité de délivrance de papier (13), qui sont disposées en série, l'unité de délivrance de papier (13) comportant un premier cylindre de délivrance de papier (21) qui est en contact avec un cylindre d'impression (20) dans l'unité d'impression (12) de façon à être apte à porter une feuille d'impression (S) en tenant une extrémité de la feuille d'impression, un deuxième cylindre de délivrance (22) qui est en contact avec le premier cylindre de délivrance (21) de façon à être apte à porter la feuille d'impression (S) en tenant une extrémité de la feuille d'impression, un mécanisme de saisie à chaîne (23) apte à tenir et à porter la feuille d'impression (S) reçue à partir du deuxième cylindre de délivrance (22), et une table de délivrance de papier (24) sur laquelle les feuilles d'impression (S) portées par le mécanisme de saisie à chaîne (23) sont empilées, un dispositif de séchage (14) pour faire sécher de l'encre transférée sur la feuille d'impression (S) par irradiation de rayons ultraviolets étant agencé de façon à être opposé à la surface périphérique externe du deuxième cylindre de délivrance (22), de façon à améliorer ainsi la qualité d'impression.
PCT/JP2010/059212 2009-07-31 2010-05-31 Machine d'impression WO2011013442A1 (fr)

Applications Claiming Priority (2)

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JP2009179862A JP2011031485A (ja) 2009-07-31 2009-07-31 印刷機
JP2009-179862 2009-07-31

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WO2011013442A1 true WO2011013442A1 (fr) 2011-02-03

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CN104742497A (zh) * 2013-12-31 2015-07-01 江苏昌昇集团股份有限公司 一种双面多色硬压软胶印机
CN105667067A (zh) * 2014-11-19 2016-06-15 江苏昌昇集团股份有限公司 大对开双面薄纸胶印机
CN115284739A (zh) * 2022-07-29 2022-11-04 武汉市卓源印务有限公司 一种环保型uv印刷机及其印刷工艺
CN115284739B (zh) * 2022-07-29 2024-05-24 武汉市卓源印务有限公司 一种环保型uv印刷机及其印刷工艺

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JP2013107296A (ja) * 2011-11-22 2013-06-06 Mitsubishi Heavy Industries Printing & Packaging Machinery Ltd 枚葉シートの浮き防止装置及び枚葉印刷機並びに浮き防止方法
JP2014046522A (ja) * 2012-08-30 2014-03-17 Fujifilm Corp 乾燥装置及び画像形成装置
CN103802450B (zh) * 2014-01-27 2016-04-20 虎彩印艺股份有限公司 一种印刷设备中的套准定位装置及其定位方法
DE102015116491A1 (de) * 2014-09-30 2016-03-31 manroland sheetfed GmbH Bogenrotationsoffsetdruckmaschine mit Einrichtungen für das gleichmäßige Trocknen von beidseitig bedruckten Druckbögen
CN104924748A (zh) * 2015-06-01 2015-09-23 铜陵方正塑业科技有限公司 印刷装置
CN105346202B (zh) * 2015-11-05 2018-06-12 浙江特美新材料股份有限公司 水松纸凸印机中的印刷机及其印刷方法
CN105346203B (zh) * 2015-11-05 2017-10-31 浙江特美新材料股份有限公司 一种应用于水松纸印刷的凸印机
DE102016204547A1 (de) * 2016-03-18 2017-09-21 Koenig & Bauer Ag Verfahren zur Konfigurierung einer Trocknereinrichtung in einer Druckmaschine und eine Druckmaschine

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CN104742497A (zh) * 2013-12-31 2015-07-01 江苏昌昇集团股份有限公司 一种双面多色硬压软胶印机
CN105667067A (zh) * 2014-11-19 2016-06-15 江苏昌昇集团股份有限公司 大对开双面薄纸胶印机
CN115284739A (zh) * 2022-07-29 2022-11-04 武汉市卓源印务有限公司 一种环保型uv印刷机及其印刷工艺
CN115284739B (zh) * 2022-07-29 2024-05-24 武汉市卓源印务有限公司 一种环保型uv印刷机及其印刷工艺

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