WO2011013442A1 - Printing machine - Google Patents

Printing machine 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
Prior art date
Application number
PCT/JP2010/059212
Other languages
French (fr)
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/en

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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—Ultra-violet 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.

Abstract

A printing machine comprises a paper feeding unit (11), a printing unit (12), and a paper delivery unit (13) which are arranged in series, wherein the paper delivery unit (13) is provided with a first paper delivery cylinder (21) which is in contact with an impression cylinder (20) in the printing unit (12) so as to be capable of carrying a printing sheet (S) by holding a tip of the printing sheet, a second delivery cylinder (22) which is in contact with the first delivery cylinder (21) so as to be capable of carrying the printing sheet(S) by holding a tip of the printing sheet, a chain gripper mechanism (23) capable of holding and carrying the printing sheet (S) received from the second delivery cylinder (22), and a paper delivery table (24) on which the printing sheets (S) carried by the chain gripper mechanism (23) are stacked, and wherein a drying device (14) for drying ink transferred onto the printing sheet (S) by irradiating ultraviolet rays is arranged to be opposed to the outer peripheral surface of the second delivery cylinder (22), to thereby improve the printing quality.

Description

印刷機Printer
　本発明は、印刷シートに転写されたインキを乾燥する乾燥機能を有する印刷機に関するものである。 The present invention relates to a printing machine having a drying function for drying ink transferred to a printing sheet.
　オフセット枚葉印刷機の印刷装置は、給紙部と印刷部と排紙部とから構成されている。従って、給紙台上に積み重ねられた印刷シートは、給紙部により吸引されて前方へ送り出され、印刷部で所定の印刷が施された後、排紙部により排紙台上に積み重ねられて排紙される。 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.
　このオフセット枚葉印刷機にて、印刷部では、印刷シートの印刷面に対してインキが転写されるが、このインキを乾燥させる乾燥装置として、紫外線を照射する紫外線照射装置が用いられている。 In the offset sheet-fed printing press, ink is transferred to the printing surface of the printing sheet in the printing section. As a drying device for drying the ink, an ultraviolet irradiation device that irradiates ultraviolet rays is used.
　このような枚葉印刷機の乾燥装置としては、下記特許文献１に記載されたものがある。特許文献１に記載された乾燥装置では、印刷ユニットにより印刷用紙の一方の面に対して印刷が行われた後、貯え胴にて第１乾燥装置により紫外線が照射されて乾燥され、印刷ユニットにより印刷用紙の他方の面に対して印刷が行われた後、搬送部にて第２乾燥装置により紫外線が照射されて乾燥される構成となっている。 As a drying device for such a sheet-fed printing machine, there is one described in Patent Document 1 below. In the drying apparatus described in Patent Document 1, after printing is performed on one surface of the printing paper by the printing unit, the first drying apparatus irradiates the storage cylinder with ultraviolet rays and is dried. 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.
特許第４０３７７６３号公報Japanese Patent No. 4037763
　紫外線を照射してインキを乾燥する場合、印刷ユニットから紫外線照射装置まで距離や紫外線光源から印刷用紙までの距離が重要であり、この距離を適正距離とすることで、高い印刷品質を確保することができる。上述した従来の印刷機にあっては、印刷ユニットにより印刷用紙の他方の面に対して印刷を行い、搬送部のチェーングリッパ機構により印刷用紙を搬送するときに、第２乾燥装置により紫外線を照射してインキを乾燥し、その後に排紙している。このチェーングリッパ機構により印刷用紙を搬送するとき、印刷用紙は、特に、搬送方向の後端部側（紙尻側）がばたつきやすく、印刷用紙に対して紫外線を適正に照射することができず、高い印刷品質を確保することが困難となる。 When drying ink by irradiating ultraviolet rays, 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. In the above-described conventional printing machine, when the printing unit prints on the other side of the printing paper and the printing paper is conveyed by the chain gripper mechanism of the conveying unit, the second drying device irradiates ultraviolet rays. The ink is then dried and then discharged. When transporting printing paper with this chain gripper mechanism, 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.
　本発明は上述した課題を解決するものであり、印刷品質の向上を図る印刷機を提供することを目的とする。 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.
　上記の目的を達成するための本発明の印刷機は、給紙部と印刷部と排紙部が直列に配置される印刷機において、前記排紙部は、前記印刷部における印刷胴からの印刷シートの先端を保持して搬送可能な第１排紙胴と、該第１排紙胴からの印刷シートの先端を保持して搬送可能な第２排紙胴と、該第２排紙胴から受け取った印刷シートを保持して搬送可能な搬送機構と、該搬送機構により搬送された印刷シートが積み上げられる排紙台とを有し、前記第２排紙胴の外周面に対向して紫外線を照射して印刷シートに転写されたインキを乾燥させる乾燥装置が配設される、ことを特徴とするものである。 In order to achieve the above object, a printing machine according to the present invention 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.
　本発明の印刷機では、前記印刷胴は、印刷シートにインキが転写されるときに所定の印圧を付与する圧胴であって、該圧胴と前記第２排紙胴とが予め設定された所定距離だけ離間して配置されることを特徴としている。 In the printing press of the present invention, 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.
　本発明の印刷機では、前記乾燥装置による紫外線照射位置を搬送される印刷シートの暴れを抑制するシート保持手段が設けられることを特徴としている。 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.
　本発明の印刷機では、前記シート保持手段は、前記第２排紙胴の内部から印刷シートを吸着して保持可能な吸着手段を有することを特徴としている。 In the printing press according to the present invention, 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.
　本発明の印刷機では、前記第１排紙胴と印刷シートの印刷面との接触を抑制するシート保護手段が設けられることを特徴としている。 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.
　本発明の印刷機では、前記シート保護手段は、前記第１排紙胴の内部から印刷シートに対してエアを噴射可能なエア噴射手段を有することを特徴としている。 In the printing machine of the present invention, the sheet protection means includes air injection means capable of injecting air onto the print sheet from the inside of the first discharge cylinder.
　本発明の印刷機では、前記シート保護手段は、前記第１排紙胴から所定距離だけ離間するガイド部材と、印刷シートを該ガイド部材に密着可能なエア噴射手段を有することを特徴としている。 In the printing press according to the present invention, 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.
　本発明の印刷機では、表面印刷部と裏面印刷部との間に、印刷シートの先端を保持して搬送可能な第１中間胴と、該第１中間胴からの印刷シートの先端を保持して搬送可能な第２中間胴とが配設され、前記第２中間胴の外周面に対向して紫外線を照射して印刷シートに転写されたインキを乾燥させる乾燥装置が配設されることを特徴としている。 In the printing machine of the present invention, 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. And 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.
　本発明の印刷機では、前記乾燥装置は、前記第２排紙胴または前記第２中間胴の軸方向に沿って配列される複数の紫外線照射部と、該複数の紫外線照射部の一部を隠蔽可能なシャッタとを有することを特徴としている。 In the printing machine according to the aspect of the invention, 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.
　本発明の印刷機によれば、給紙部と印刷部と排紙部を直列に配置し、排紙部として、印刷シートの先端を保持して搬送可能な第１排紙胴と、第１排紙胴からの印刷シートの先端を保持して搬送可能な第２排紙胴と、第２排紙胴から受け取った印刷シートを保持して搬送可能な搬送機構と、搬送機構により搬送された印刷シートが積み上げられる排紙台とを設け、第２排紙胴の外周面に対向して紫外線を照射して印刷シートに転写されたインキを乾燥させる乾燥装置を配設している。従って、印刷部によりインキが転写された印刷シートが、第１排紙胴を介して第２排紙胴に搬送されるとき、乾燥装置は、第２排紙胴上の印刷シートに対して紫外線を照射してインキを乾燥させるため、印刷部から乾燥装置までの距離と乾燥装置から印刷シートまでの距離を最適距離とすることが可能となり、印刷品質を向上することができる。 According to the printing machine of the present invention, 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. Accordingly, when the print sheet having the ink transferred by the printing unit is conveyed to the second discharge cylinder via the first discharge cylinder, 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.
　本発明の印刷機によれば、印刷胴を、印刷シートにインキが転写されるときに所定の印圧を付与する圧胴とし、圧胴と第２排紙胴とを予め設定された所定距離だけ離間して配置するので、印刷部によりインキが転写された印刷シートは、所定時間経過後に紫外線が照射されてインキが乾燥することとなり、この間に印刷シート上のインキが平滑となり、高い光沢性を確保することができる。 According to the printing machine of the present invention, 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.
　本発明の印刷機によれば、乾燥装置による紫外線照射位置を搬送される印刷シートの暴れを抑制するシート保持手段を設けるので、シート保持手段により印刷シートの暴れを抑制することで、乾燥装置と印刷シートとの距離を適正位置に維持することができると共に、印刷シートと乾燥装置との接触を防止して印刷面の損傷を防止することができる。 According to the printing machine of the present invention, since the sheet holding unit that suppresses the fluctuation of the printing sheet conveyed to the ultraviolet irradiation position by the drying device is provided, 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.
　本発明の印刷機によれば、シート保持手段として、第２排紙胴の内部から印刷シートを吸着して保持可能な吸着手段を設けるので、簡単な構成で高い印刷品質を確保することができる。 According to the printing machine of the present invention, as the sheet holding unit, 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. .
　本発明の印刷機によれば、第１排紙胴と印刷シートの印刷面との接触を抑制するシート保護手段を設けるので、シート保護手段により第１排紙胴と印刷シートの印刷面との接触を抑制することで、印刷シートの印刷面の損傷を防止することができる。 According to the printing machine of the present invention, 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.
　本発明の印刷機によれば、シート保護手段として、第１排紙胴の内部から印刷シートに対してエアを噴射可能なエア噴射手段を設けるので、簡単な構成で高い印刷品質を確保することができる。 According to the printing machine of the present invention, since 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.
　本発明の印刷機によれば、シート保護手段として、第１排紙胴から所定距離だけ離間するガイド部材と、印刷シートをガイド部材に密着可能なエア噴射手段を設けるので、簡単な構成で高い印刷品質を確保することができる。 According to the printing machine of the present invention, as the sheet protection means, 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.
　本発明の印刷機によれば、表面印刷部と裏面印刷部との間に、印刷シートの先端を保持して搬送可能な第１中間胴と、第１中間胴からの印刷シートの先端を保持して搬送可能な第２中間胴とを配設し、第２中間胴の外周面に対向して紫外線を照射して印刷シートに転写されたインキを乾燥させる乾燥装置を配設するので、両面印刷の場合であっても、印刷部から乾燥装置までの距離と乾燥装置から印刷シートまでの距離を最適距離とすることができ、印刷品質を向上することができる。 According to the printing machine of the present invention, between the front surface printing unit and the back surface printing unit, 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. And 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. Even in the case of printing, the distance from the printing unit to the drying device and the distance from the drying device to the printing sheet can be set as the optimum distance, and the printing quality can be improved.
　本発明の印刷機によれば、乾燥装置として、第２排紙胴または第２中間胴の軸方向に沿って配列される複数の紫外線照射部と、複数の紫外線照射部の一部を隠蔽可能なシャッタとを設けるので、印刷シートにおける印刷領域に応じてシャッタにより紫外線照射部による紫外線照射領域を調整することで、不要な領域への紫外線照射をなくし、印刷領域外へ飛散したインキの固化を防止して第２排紙胴や第２中間胴の汚れを抑制することができる。 According to the printing machine of the present invention, 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.
図１は、本発明の実施例１に係るオフセット枚葉印刷機を表す概略構成図である。FIG. 1 is a schematic configuration diagram illustrating an offset sheet-fed printing press according to a first embodiment of the present invention. 図２は、実施例１のオフセット枚葉印刷機の排紙部を表す概略図である。FIG. 2 is a schematic diagram illustrating a paper discharge unit of the offset sheet-fed printing press according to the first embodiment. 図３は、実施例１のオフセット枚葉印刷機の排紙胴を表す概略図である。FIG. 3 is a schematic diagram illustrating a sheet discharge cylinder of the offset sheet-fed printing press according to the first embodiment. 図４は、実施例１のオフセット枚葉印刷機の排紙胴の変形例を表す概略図である。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. 図５は、実施例１のオフセット枚葉印刷機の乾燥装置を表す正面図である。FIG. 5 is a front view illustrating a drying device of the offset sheet-fed printing press according to the first embodiment. 図６は、実施例１のオフセット枚葉印刷機の乾燥装置を表す側面図である。FIG. 6 is a side view illustrating a drying device of the offset sheet-fed printing press according to the first embodiment. 図７は、実施例１のオフセット枚葉印刷機の乾燥装置の変形例を表す正面図である。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. 図８は、実施例１のオフセット枚葉印刷機の乾燥装置の変形例を表す側面図である。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. 図９は、本発明の実施例２に係る両面オフセット枚葉印刷機を表す概略構成図である。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. 図１０は、本発明の実施例３に係る両面オフセット枚葉印刷機を表す概略構成図である。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.
　以下に添付図面を参照して、本発明に係る印刷機の好適な実施例を詳細に説明する。なお、この実施例により本発明が限定されるものではない。 Hereinafter, preferred embodiments of a printing press according to the present invention will be described in detail with reference to the accompanying drawings. In addition, this invention is not limited by this Example.
　図１は、本発明の実施例１に係るオフセット枚葉印刷機を表す概略構成図、図２は、実施例１のオフセット枚葉印刷機の排紙部を表す概略図、図３は、実施例１のオフセット枚葉印刷機の排紙胴を表す概略図、図４は、実施例１のオフセット枚葉印刷機の排紙胴の変形例を表す概略図、図５は、実施例１のオフセット枚葉印刷機の乾燥装置を表す正面図、図６は、実施例１のオフセット枚葉印刷機の乾燥装置を表す側面図、図７は、実施例１のオフセット枚葉印刷機の乾燥装置の変形例を表す正面図、図８は、実施例１のオフセット枚葉印刷機の乾燥装置の変形例を表す側面図である。 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, and 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, and FIG. FIG. 6 is a side view showing the drying device of the offset sheet-fed printing press of the first embodiment, and 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.
　実施例１のオフセット枚葉印刷機は、図１に示すように、給紙部１１と印刷部１２と排紙部１３が印刷用紙（印刷シート）Ｓの搬送方向に直列に配置されてなり、排紙部１３に乾燥装置１４が配置されている。この場合、印刷部１２は、５つの印刷ユニット１２ａ，１２ｂ，１２ｃ，１２ｄ，１２ｅにより構成されている。 As shown in FIG. 1, the offset sheet-fed printing machine according to the first embodiment 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. In this case, the printing unit 12 includes five printing units 12a, 12b, 12c, 12d, and 12e.
　上述した構造の印刷機では、給紙部１１から印刷部１２に印刷用紙Ｓが供給されると、この印刷部１２にて、５色のインキ（例えば、シアン、マゼンタ、イエロー、ブラック、ゴールド）が、印刷ユニット１２ａ，１２ｂ，１２ｃ，１２ｄ，１２ｅごとに、版胴及びブランケット胴を介して印刷面となる印刷用紙Ｓの表面に対して転写される。そして、表に印刷が施された印刷用紙Ｓが、排紙部１３にて排出される。この場合、インキは、紫外線が照射されることで乾燥して固化する紫外線硬化性インキ（ＵＶインキ）である。 In the printing machine having the above-described structure, when the printing paper S is supplied from the paper supply unit 11 to the printing unit 12, 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. In this case, the ink is an ultraviolet curable ink (UV ink) that dries and solidifies when irradiated with ultraviolet rays.
　このように構成された実施例１のオフセット枚葉印刷機における排紙部１３は、図２に示すように、印刷部１２で印刷された印刷用紙Ｓを搬送し、整列した状態で積み重ねるものである。この排紙部１３は、印刷用紙Ｓの先端を保持して搬送可能な第１排紙胴２１及び第２排紙胴２２と、各排紙胴２１，２２の上方に配設されて第２排紙胴２２から受け取った印刷用紙Ｓの先端を保持して搬送可能なチェーングリッパ機構（搬送機構）２３と、チェーングリッパ機構２３により搬送される印刷用紙Ｓが積み上げられる排紙台２４とを有している。 As shown in FIG. 2, the paper discharge unit 13 in the offset sheet-fed printing press according to the first embodiment configured as described above 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.
　第１排紙胴２１は、印刷部１２における圧胴（印刷胴）２０における印刷シートＳの搬送方向の下流側に位置し、この圧胴２０と対接して配置されている。そして、この第１排紙胴２１は、図示しない駆動装置により、図２にて時計回り方向に回転可能であると共に、外周部に印刷シートＳの前端部を保持可能な２つの咥え爪２１ａ，２１ｂが周方向に等間隔で設けられている。一方、第２排紙胴２２は、第１排紙胴２１における印刷シートＳの搬送方向の下流側に位置し、この第１排紙胴２１と対接して配置されている。そして、この第２排紙胴２２は、図示しない駆動装置により、図２にて反時計回り方向に回転可能であると共に、外周部に印刷シートＳの前端部を保持可能な２つの咥え爪２２ａ，２２ｂが周方向に等間隔で設けられている。 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. On the other hand, 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.
　なお、圧胴２０は、図示しない駆動装置により、図２にて反時計回り方向に回転可能であると共に、外周部に印刷シートＳの前端部を保持可能な２つの咥え爪２０ａ，２０ｂが周方向に等間隔で設けられている。この場合、圧胴２０と第１排紙胴２１と第２排紙胴２２は、軸端部が図示しないフレームに回転自在に支持され、同一の駆動装置により印刷作業に合わせて上述の回転方向に回転可能となっている。但し、作業の種類に応じて、駆動装置により圧胴２０と第１排紙胴２１と第２排紙胴２２を逆方向に回転することもできる。 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. In this case, 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. However, 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.
　チェーングリッパ機構２３は、第２排紙胴２２から排紙台２４にかけて、その上方に掛け渡されるように配置されている。即ち、第２排紙胴２２の上方に第１スプロケット２５が駆動回転可能に支持され、排紙台２４の上方に第１スプロケット２５より小径の第２スプロケット２６が回転自在に支持されており、各スプロケット２５，２６には、無端のチェーン２７が掛け回されている。そして、このチェーン２７は、チェーンガイド２８に支持されると共に、その長手方向に所定の間隔で複数のグリッパ２９が装着されている。このグリッパ２９は、チェーン２７に連結された咥え棒２９ａと、咥え棒２９ａとで印刷用紙Ｓの前端部を挟持する爪部２９ｂを有しており、挟持した印刷用紙Ｓが排紙台２４の上方に来たときに、爪部２９ｂを解放する。 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.
　排紙部１３には、印刷用紙Ｓの搬送方向に沿って走行してチェーングリッパ機構２３により搬送される印刷用紙Ｓを案内するベルトガイド機構３１と、排紙台２４の上方にて下降気流を形成するファン装置３２と、排紙台２４より上流側にてチェーングリッパ機構２３により搬送された印刷用紙Ｓの速力を落とす真空吸引車装置３３が設けられている。 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. A fan device 32 to be formed and a vacuum suction wheel device 33 for reducing the speed of the printing paper S conveyed by the chain gripper mechanism 23 on the upstream side from the paper discharge table 24 are provided.
　ベルトガイド機構３１は、チェーングリッパ機構２３の下方であって、第２排紙胴２２と排紙台２４との間に配置されている。このベルトガイド機構３１は、回転駆動可能な駆動ローラ４１と、この駆動ローラ４１に従動して回転可能に設けられた複数の従動ローラ４２と、駆動ローラ４１及び複数の従動ローラ４２に張設される無端ベルト４３とを有している。無端ベルト４３は、印刷用紙Ｓの幅よりも大きい幅をなし、チェーングリッパ機構２３に対向する部位では、印刷用紙Ｓの搬送方向に沿ってチェーングリッパ機構２３により搬送される印刷用紙Ｓの速度と同速度で循環移動可能に設けられている。 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. And an endless belt 43. The endless belt 43 has a width larger than the width of the printing paper S, and at a portion facing the chain gripper mechanism 23, the speed of the printing paper S conveyed by the chain gripper mechanism 23 along the conveyance direction of the printing paper S is determined. It is provided so that it can circulate at the same speed.
　ファン装置３２は、略矩形状に配置された複数のファンを有し、排紙台２４の上方でチェーングリッパ機構２３により搬送された印刷用紙Ｓを気流によって鉛直方向下方へ押し付けるものである。真空吸引車装置３３は、ベルトガイド機構３１と排紙台２４との間に配置され、チェーングリッパ機構２３が印刷用紙Ｓを解放した後に、印刷用紙Ｓの後端部に吸引力を作用させて印刷用紙Ｓを制動し、姿勢を制御するものである。 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.
　この場合、第１排紙胴２１と第２排紙胴２２とチェーングリッパ機構２３（第１スプロケット２５）は、下方から上方へ向かって直列配置されている。 In this case, the first discharge cylinder 21, the second discharge cylinder 22, and the chain gripper mechanism 23 (first sprocket 25) are arranged in series from the bottom to the top.
　従って、図１及び図２に示すように、印刷部１２で印刷が施された印刷用紙Ｓは、前端部が印刷ユニット１２ｅにおける圧胴２０の咥え爪２０ａ（２０ｂ）により保持された状態で、排紙部１３まで搬送される。排紙部１３では、まず、第１排紙胴２１の咥え爪２１ａ（２１ｂ）が、圧胴２０により搬送された印刷用紙Ｓを受け取って搬送し、次に、第２排紙胴２２の咥え爪２２ａ（２２ｂ）が、第１排紙胴２１により搬送された印刷用紙Ｓを受け取って搬送し、チェーングリッパ機構２３に受け渡される。このチェーングリッパ機構２３では、グリッパ２９が第２排紙胴２２により搬送された印刷用紙Ｓを受取り、このグリッパ２９が印刷用紙Ｓの前端部を保持した状態でチェーン２７が移動することで、この印刷用紙Ｓを排紙台２４まで搬送し、グリッパ２９による印刷用紙Ｓの保持を解除して排紙台２４上に積み重ねていく。このとき、ベルトガイド機構３１において循環する無端ベルト４３が、チェーングリッパ機構２３の下方で印刷用紙Ｓの搬送方向に沿う走行方向に走行することにより、グリッパ２９で前端部が狭持された状態の印刷用紙Ｓを下側から支えてその搬送を案内する。 Accordingly, as shown in FIGS. 1 and 2, 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. In the paper discharge unit 13, first, 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. In this 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. At this time, 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.
　このように構成された排紙部１３にて、第２排紙胴２２の外周面に対向して紫外線を照射して印刷用紙Ｓに転写されたインキを乾燥させる乾燥装置１４が配設されている。この場合、乾燥装置１４は、圧胴２０から予め設定された所定距離だけ離間して配置される第２排紙胴２２に対向して配置されている。この場合、所定距離とは、印刷用紙Ｓの走行距離である。なお、乾燥装置１４は、後述するが、紫外線（ＵＶ：Ｕｌｔｒａｖｉｏｌｅｔ）を照射可能な発光ダイオード（ＬＥＤ：Ｌｉｇｈｔ　Ｅｍｉｔｔｉｎｇ　Ｄｉｏｄｅ）であり、第２排紙胴２２の軸方向（印刷用紙Ｓの幅方向）に沿って複数配設されて構成される。 In the paper discharge unit 13 configured as described above, 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. In this case, 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. As will be described later, 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.
　従って、印刷部１２で印刷が施された印刷用紙Ｓが、排紙部１３に搬送され、第１排紙胴２１から第２排紙胴２２に至り、この第２排紙胴２２の回転に伴って表面を移動するとき、乾燥装置１４のＵＶ－ＬＥＤにより印刷用紙Ｓの印刷面に転写されたインキに対して紫外線が照射される。この場合、印刷部１２にて、インキ供給装置により供給されたインキが版胴からブランケット胴を介して印刷用紙Ｓの表面に転写されるとき、印刷用紙Ｓに対してブランケット胴が転動することから、このブランケット胴が印刷用紙Ｓの表面から離れるとき、印刷用紙Ｓの表面に転写されたインキは、表面が凹凸形状となってしまう。 Accordingly, 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. When moving along the surface, 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. In this case, 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.
　そこで、本実施例では、圧胴２０と第２排紙胴２２（乾燥装置１４）とが所定距離だけ離間している。そのため、印刷用紙Ｓが圧胴２０から第２排紙胴２２まで所定距離だけ搬送される間に、この印刷用紙Ｓの表面にあるインキは、その流動性により表面が凹凸形状から平滑形状に変化する。即ち、印刷部１２から第１排紙胴２１を介して第２排紙胴２２に搬送された印刷用紙Ｓは、転写されたインキの表面が平滑状となり、この状態でインキに紫外線が照射されることから、印刷用紙Ｓ上のインキが平滑状態で乾燥し、固化することとなり、高い光沢性が確保される。 Therefore, in this embodiment, 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.
　また、この実施例１では、乾燥装置１４による紫外線照射位置を搬送される印刷用紙Ｓの暴れを抑制するシート保持手段として、第２排紙胴２２の内部から印刷用紙Ｓを吸着して保持可能な吸着手段が設けられている。 Further, in the first embodiment, 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.
　更に、この実施例１では、第１排紙胴２１と印刷用紙Ｓの印刷面との接触を抑制するシート保護手段として、第１排紙胴２１の内部から印刷用紙Ｓに対してエアを噴射可能なエア噴射手段が設けられている。なお、このシート保護手段としては、第１排紙胴２１から所定距離だけ離間するガイド部材と、印刷用紙Ｓをこのガイド部材に密着可能なエア噴射手段としてもよい。 Further, in the first embodiment, 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.
　即ち、図３に示すように、第２排紙胴２２にて、その表面部には、４つの吸引部５１，５２，５３，５４が周方向に沿って並設されている。各吸引部５１，５２，５３，５４は、第２排紙胴２２の表面に沿って周方向に弧状をなすと共に、第２排紙胴２２の軸方向の全域にわたって設けられている。この場合、吸引部５１，５２は、咥え爪２２ａが保持した印刷用紙Ｓの長手方向の中間部、後端部をそれぞれ吸着し、吸引部５３，５４は、咥え爪２２ｂが保持した印刷用紙Ｓの長手方向の中間部、後端部をそれぞれ吸着する。 That is, as shown in FIG. 3, in the second paper discharge drum 22, four suction portions 51, 52, 53, 54 are arranged in parallel along the circumferential direction on the surface portion. Each of the suction portions 51, 52, 53, and 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. In this case, 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.
　各吸引部５１，５２，５３，５４は、ほぼ同様の構成をなし、中空形状をなして第２排紙胴２２の表面側に多数の吸引穴を有しており、各連結管５１ａ，５２ａ，５３ａ，５４ａを介して吸引管５５に連結されている。この吸引管５５は、図示しないフレーム側に配設されたエア吸引ポンプの配管とロータリジョイントを介して連結されている。 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.
　一方、第１排紙胴２１にて、その表面部には、４つの吐出部５６，５７，５８，５９が周方向に沿って並設されている。各吐出部５６，５７，５８，５９は、第１排紙胴２１の表面に沿って周方向に弧状をなすと共に、第１排紙胴２１の軸方向の全域にわたって設けられている。この場合、吐出部５６，５７は、咥え爪２１ａが保持した印刷用紙Ｓの長手方向の中間部、後端部をエアによりそれぞれ吹き上げ、吐出部５８，５９は、咥え爪２１ｂが保持した印刷用紙Ｓの長手方向の中間部、後端部をエアによりそれぞれ吹き上げる。 On the other hand, on the surface of the first paper discharge cylinder 21, four discharge parts 56, 57, 58, 59 are arranged in parallel along the circumferential direction. 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. In this case, 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.
　各吐出部５６，５７，５８，５９は、ほぼ同様の構成をなし、中空形状をなして第１排紙胴２１の表面側に多数の吐出穴を有しており、各連結管５６ａ，５７ａ，５８ａ，５９ａを介して吐出管６０に連結されている。この吐出管６０は、図示しないフレーム側に配設されたエア吐出ポンプの配管とロータリジョイントを介して連結されている。 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.
　また、図４に示すように、第１排紙胴２１における下方側には、この第１排紙胴２１から所定間隔離れた位置にガイド部材６１が配設されている。このガイド部材６１は、第１排紙胴２１の表面に沿って周方向に弧状をなすと共に、第１排紙胴２１の軸方向の全域にわたって設けられている。また、このガイド部材６１は、中空形状をなすエアチャンバであって、第１排紙胴２１の表面に対向するに内周面側には、第１排紙胴２１における印刷用紙Ｓの下流側に向けてエアを噴射する多数の噴射穴（エア噴射手段）を有している。このガイド部材６１は、図示しないフレーム側に支持されており、図示しないエアポンプからのエア配管６２が連結されている。この場合、第１排紙胴２１は、表面に空洞部を有するスケルトン構造とすることが望ましい。 Further, as shown in FIG. 4, 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.
　従って、図２及び図３に示すように、印刷部１２で印刷が施された印刷用紙Ｓが、排紙部１３に搬送され、圧胴２０から第１排紙胴２１に受け渡されると、この第１排紙胴２１にて、印刷用紙Ｓは、各吐出部５６，５７，５８，５９にある多数の吐出穴から噴射されたエアにより第１排紙胴２１の表面から若干離れる。そのため、印刷用紙Ｓの印刷面と第１排紙胴２１の表面との接触が抑制されることで、第１排紙胴２１へのインキの付着が防止され、印刷品質の低下が抑制される。 Accordingly, as shown in FIGS. 2 and 3, when the printing paper S printed by the printing unit 12 is conveyed to the paper discharge unit 13 and transferred from the impression cylinder 20 to the first paper discharge cylinder 21, In the first paper discharge cylinder 21, the printing paper S is slightly separated from the surface of the first paper discharge cylinder 21 due to the air ejected from a large number of discharge holes in each of the discharge portions 56, 57, 58, 59. Therefore, 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. .
　その後、印刷用紙Ｓが、第１排紙胴２１から第２排紙胴２２に受け渡されると、この第２排紙胴２２にて、印刷用紙Ｓは、各吸引部５１，５２，５３，５４にある多数の吸引穴により吸引されるエアにより第２排紙胴２２の表面に吸着される。そのため、印刷用紙Ｓのばたつきが抑制されることで、この印刷用紙Ｓは、乾燥装置１４から適正距離で紫外線を受けることとなり、印刷品質を向上できる。また、印刷用紙Ｓの印刷面と乾燥装置１４との接触が抑制され、印刷面の損傷を防止することができると共に、乾燥装置１４へのインキの付着が防止される。 Thereafter, when 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.
　また、図２及び図４に示すように、印刷部１２で印刷が施された印刷用紙Ｓが、排紙部１３に搬送され、圧胴２０から第１排紙胴２１に受け渡されると、この第１排紙胴２１にて、ガイド部材６１にある多数の噴射穴から印刷用紙Ｓとの間にエアが噴射されると、このエアがガイド部材６１と印刷用紙Ｓとの間に流れてこの領域が真空状態に近い状態となることで、この印刷用紙Ｓは、ベルヌーイの定理によりガイド部材６１に吸着され、第１排紙胴２１の表面から離れる。そのため、印刷用紙Ｓの印刷面と第１排紙胴２１の表面との接触が抑制されることで、第１排紙胴２１へのインキの付着が防止され、印刷品質の低下が抑制される。その後は上述と同様に、印刷用紙Ｓが、第２排紙胴２２の表面に吸着されながら、乾燥装置１４によりインキが乾燥されることで、印刷品質を向上できる。 Also, as shown in FIGS. 2 and 4, when the printing paper S printed by the printing unit 12 is conveyed to the paper discharge unit 13 and transferred from the impression cylinder 20 to the first paper discharge cylinder 21, When air is ejected from the numerous ejection holes in the guide member 61 between the first discharge cylinder 21 and the printing paper S, the air flows between the guide member 61 and the printing paper S. When this region is close to a vacuum state, the printing paper S is attracted to the guide member 61 according to Bernoulli's theorem and is separated from the surface of the first paper discharge cylinder 21. Therefore, 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. . Thereafter, as described above, 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.
　また、乾燥装置１４において、図５及び図６に示すように、第２排紙胴２２の軸方向に長いハウジング７１には、第２排紙胴２２の表面に対向する正面部に多数の紫外線を照射可能なＵＶ－ＬＥＤ（紫外線照射部）７２が固定されている。このＵＶ－ＬＥＤ７２は、第２排紙胴２２の軸方向に沿って一列状に配置されており、第２排紙胴２２の幅、つまり、搬送される印刷用紙Ｓの幅の全域に対応して設けられている。このハウジング７１の両側には、その表面側に位置して第２排紙胴２２の軸方向に沿って移動可能な平板形状をなすシャッタ７３，７４が設けられており、このシャッタ７３，７４は、エアシリンダ７５，７６によりスライド可能であり、複数のＵＶ－ＬＥＤ７２の一部を隠蔽可能となっている。 Further, in the drying device 14, as shown in FIGS. 5 and 6, 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. 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.
　なお、このシャッタ７３，７４は、この構成に限定されるものではない。図７及び図８に示すように、第２排紙胴２２の軸方向に長いハウジング８１には、第２排紙胴２２の表面に対向する正面部に多数の紫外線を照射可能なＵＶ－ＬＥＤ（紫外線照射部）８２が固定されている。このＵＶ－ＬＥＤ８２は、第２排紙胴２２の軸方向に沿って一列状に配置されており、第２排紙胴２２の幅、つまり、搬送される印刷用紙Ｓの幅の全域に対応して設けられている。このハウジング８１の両側には、ハウジング８１に嵌合して第２排紙胴２２の軸方向に沿って移動可能な箱形状をなすシャッタ８３，８４が設けられており、このシャッタ８３，８４は、エアシリンダ８５，８６によりスライド可能であり、複数のＵＶ－ＬＥＤ８２の一部を隠蔽可能となっている。 Note that the shutters 73 and 74 are not limited to this configuration. As shown in FIGS. 7 and 8, 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. On both sides of the housing 81, there are 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.
　従って、乾燥装置１４において、図５乃至図８に示すように、印刷用紙Ｓの幅が最大であるときには、エアシリンダ７５，７６（８５，８６）によりシャッタ７３，７４（８３，８４）を外方にスライドすることで、全てのＵＶ－ＬＥＤ７２（８２）を露出させる。一方、印刷用紙Ｓの幅が最大から狭くなったときには、エアシリンダ７５，７６（８５，８６）によりシャッタ７３，７４（８３，８４）を内方にスライドすることで、不要なＵＶ－ＬＥＤ７２（８２）を隠蔽し、印刷用紙Ｓの幅に対応した一部のＵＶ－ＬＥＤ７２（８２）を露出させる。 Accordingly, in the drying device 14, as shown in FIGS. 5 to 8, when the width of the printing paper S is maximum, the shutters 73 and 74 (83 and 84) 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. On the other hand, when the width of the printing paper S is reduced from the maximum, the unnecessary UV-LEDs 72 (the unnecessary UV-LEDs 72 (83, 84) 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.
　印刷部１２による印刷作業中は、周辺にインキの粒子が飛散し、第２排紙胴２２にインキが付着しやすい。そのため、所定幅の印刷用紙Ｓを使用した印刷作業では、第２排紙胴２２の表面にて、この印刷用紙Ｓの幅より外側の領域に対して、飛散しているインキが付着しやすい。印刷用紙Ｓのない第２排紙胴２２の表面の領域にインキが付着した場合、このインキが紫外線を受けると固化してしまう。すると、前回より幅の広い印刷用紙Ｓを使用した印刷作業を行うとき、第２排紙胴２２の表面の固化したインキにより印刷障害が発生してしまうおそれがある。そのため、印刷用紙Ｓの幅に合わせて、不要なＵＶ－ＬＥＤ７２（８２）を隠蔽することで、第２排紙胴２２の表面に付着したインキの固化を阻止し、付着したインキの除去を容易とし、印刷障害の発生が防止される。 During the printing operation by the printing unit 12, ink particles are scattered around and the ink tends to adhere to the second paper discharge drum 22. Therefore, in a printing operation using the printing paper S having a predetermined width, scattered ink tends to adhere to the area outside the width of the printing paper S on the surface of the second paper discharge drum 22. When ink adheres to an area on the surface of the second paper discharge drum 22 without the printing paper S, the ink is solidified when it receives ultraviolet rays. Then, when performing a printing operation using the printing paper S having a width wider than the previous time, there is a possibility that a printing failure may occur due to the solidified ink on the surface of the second paper discharge drum 22. Therefore, 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.
　ここで、実施例１のオフセット枚葉印刷機による印刷作業について説明する。 Here, the printing operation by the offset sheet-fed printing machine of the first embodiment will be described.
　実施例１のオフセット枚葉印刷機において、図１及び図２に示すように、給紙部１１は、印刷用紙Ｓを１枚ずつ所定間隔で供給し、印刷部１２は、給紙部１１から供給された印刷用紙Ｓに対して、各印刷ユニット１２ａ，１２ｂ，１２ｃ，１２ｄ，１２ｅにより５色の印刷を行う。この場合、必要に応じて１～４色印刷としてもよい。 In the offset sheet-fed printing press according to the first embodiment, as illustrated in FIGS. 1 and 2, 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.
　印刷部１２で印刷が施された印刷用紙Ｓは、排紙部１３に搬送される。即ち、印刷用紙Ｓは、圧胴２０から第１排紙胴２１に搬送され、この第１排紙胴２１から第２排紙胴２２に搬送される。このとき、乾燥装置１４は、第２排紙胴２２の回転により搬送される印刷用紙Ｓの表面にある画像（インキ）に対して、紫外線を照射する。すると、印刷用紙Ｓの表面にある画像（インキ）が紫外線を受けて乾燥し、固化する。その後、印刷用紙Ｓは、チェーングリッパ機構２３により搬送され、排紙台２４上に積み上げられる。 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. At this time, 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.
　この印刷用紙Ｓが各排紙胴２１，２２により搬送されるとき、図３に示すように、第１排紙胴２１では、印刷用紙Ｓが各吐出部５６，５７，５８，５９から噴射されたエアにより第１排紙胴２１の表面から離間することで、印刷用紙Ｓの印刷面と第１排紙胴２１の表面との接触が抑制される。また、図４に示すように、第１排紙胴２１では、ガイド部材６１から印刷用紙Ｓとの間にエアが噴射されることで、印刷用紙Ｓがベルヌーイの定理によりガイド部材６１に沿うこととなり、印刷用紙Ｓの印刷面と第１排紙胴２１の表面との接触が抑制される。 When 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. As shown in FIG. 4, in the first paper discharge cylinder 21, 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. Thus, contact between the printing surface of the printing paper S and the surface of the first discharge cylinder 21 is suppressed.
　一方、図３及び図４に示すように、第２排紙胴２２では、印刷用紙Ｓが各吸引部５１，５２，５３，５４を通して吸引されるエアにより第２排紙胴２２の表面に吸着されることで、印刷用紙Ｓのばたつきが抑制される。なお、第２排紙胴２２上を搬送される印刷用紙Ｓは、その厚さや性質により剛性（硬度）が変わり、この剛性によりばたつき量が異なる。つまり、印刷用紙Ｓの剛性が所定の剛性より高いときには、印刷用紙Ｓの変形度合が小さいことから、後端部が乾燥装置１４に接触しやすくなる。そのため、印刷用紙Ｓの剛性が所定の剛性より高いときに吸引部５１，５２，５３，５４を作動し、印刷用紙Ｓの剛性が所定の剛性以下のときに吸引部５１，５２，５３，５４を停止することが望ましい。 On the other hand, as shown in FIGS. 3 and 4, in the second paper discharge drum 22, 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. Note that 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. Therefore, when the rigidity of the printing paper S is higher than the predetermined rigidity, 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.
　また、乾燥装置１４では、図５乃至図８に示すように、印刷用紙Ｓの幅に応じてシャッタ７３，７４（８３，８４）を移動し、露出させるＵＶ－ＬＥＤ７２（８２）を選択する。つまり、第２排紙胴２２上を搬送される印刷用紙Ｓに対向するＵＶ－ＬＥＤ７２（８２）だけを露出させ、不要なＵＶ－ＬＥＤ７２（８２）を隠蔽する。 Further, in the drying device 14, as shown in FIGS. 5 to 8, the shutters 73 and 74 (83 and 84) 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.
　このように実施例１のオフセット枚葉印刷機にあっては、給紙部１１と印刷部１２と排紙部１３を直列に配置し、排紙部１３として、印刷部１２における圧胴２０に対接して印刷用紙Ｓの先端を保持して搬送可能な第１排紙胴２１と、第１排紙胴２１に対接して印刷用紙Ｓの先端を保持して搬送可能な第２排紙胴２２と、第２排紙胴２２から受け取った印刷用紙Ｓを保持して搬送可能なチェーングリッパ機構２３と、チェーングリッパ機構２３により搬送された印刷用紙Ｓが積み上げられる排紙台２４とを設け、第２排紙胴２２の外周面に対向して紫外線を照射して印刷用紙Ｓに転写されたインキを乾燥させる乾燥装置１４を配設している。 As described above, in the offset sheet-fed printing press according to the first embodiment, 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 first paper discharge cylinder 21 that can be conveyed while holding the front end of the printing paper S in contact with it, and a second paper discharge cylinder that can be conveyed while holding the front end of the printing paper S in contact with the first paper discharge cylinder 21. 22, a chain gripper mechanism 23 capable of holding and transporting the print paper S received from the second paper discharge drum 22, and a paper discharge tray 24 on which the print paper S transported by the chain gripper mechanism 23 is stacked, 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.
　従って、印刷部１２によりインキが転写された印刷用紙Ｓが、第１排紙胴２１を介して第２排紙胴２２に搬送されるとき、乾燥装置１４は、第２排紙胴２２上の印刷用紙Ｓに対して紫外線を照射してインキを乾燥させる。そのため、印刷部１２から乾燥装置１４までの距離が最適距離になると共に、乾燥装置１４から印刷用紙Ｓまでの距離が最適距離となり、印刷品質を向上することができる。 Accordingly, when the printing paper S to which the ink has been transferred by the printing unit 12 is conveyed to the second paper discharge drum 22 via the first paper discharge drum 21, 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.
　また、実施例１のオフセット枚葉印刷機では、圧胴２０と第２排紙胴２２とを予め設定された所定距離だけ離間して配置している。従って、印刷部１２によりインキが転写された印刷用紙Ｓは、所定時間経過後に紫外線が照射されてインキが乾燥することとなる。そのため、印刷用紙Ｓのインキは、その流動性により時間の経過に伴って表面が平滑となり、この平滑状態で乾燥して固化することとなり、高い光沢性を確保することができる。 Further, in the offset sheet-fed printing press of the first embodiment, 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.
　また、実施例１のオフセット枚葉印刷機では、乾燥装置１４による紫外線照射位置を搬送される印刷用紙Ｓの暴れを抑制するシート保持手段として、第２排紙胴２２の内部から印刷用紙Ｓを吸着して保持可能な吸引部５１，５２，５３，５４を設けている。従って、印刷用紙Ｓが第２排紙胴２２における乾燥装置１４との対向に搬送されるとき、吸引部５１，５２，５３，５４により第２排紙胴２２の表面に吸着保持されることとなり、印刷用紙Ｓの暴れを抑制することで、乾燥装置１４と印刷用紙Ｓとの距離を適正位置に維持することができると共に、印刷用紙Ｓと乾燥装置１４との接触を防止して印刷面の損傷を防止することができる。この場合、シート保持手段を吸引部５１，５２，５３，５４により構成することで、簡単な構成で高い印刷品質を確保することができる。 In the offset sheet-fed printing press of the first embodiment, 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. By suppressing the ramp of the printing paper S, 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. In this case, 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.
　また、実施例１のオフセット枚葉印刷機では、第１排紙胴２１と印刷用紙Ｓの印刷面との接触を抑制するシート保護手段として、第１排紙胴２１の内部から印刷用紙Ｓに対してエアを噴射可能な吐出部５６，５７，５８，５９を設けるか、または、第１排紙胴２１から所定距離だけ離間して内周面に多数の噴射穴を有するガイド部材６１を設けている。従って、印刷用紙Ｓが第１排紙胴２１に搬送されるとき、吐出部５６，５７，５８，５９により第１排紙胴２１の表面から離間することとなり、第１排紙胴２１と印刷用紙Ｓの印刷面との接触を抑制することで、印刷用紙Ｓの印刷面の損傷を防止することができる。また、シート保護手段を吐出部５６，５７，５８，５９またはガイド部材６１とすることで、簡単な構成で高い印刷品質を確保することができる。 Further, in the offset sheet-fed printing press according to the first embodiment, 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. On the other hand, there are provided 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. Accordingly, 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. By suppressing contact with the printing surface of the paper S, it is possible to prevent damage to the printing surface of the printing paper S. In addition, by using 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.
　また、実施例１のオフセット枚葉印刷機では、乾燥装置１４として、第２排紙胴２２の軸方向に沿って配列される複数のＵＶ－ＬＥＤ（紫外線照射部）７２，８２と、複数のＵＶ－ＬＥＤ７２，８２の一部を隠蔽可能なシャッタ７３，７４，８３，８４を設けている。従って、印刷用紙Ｓにおける印刷領域に応じてシャッタ７３，７４，８３，８４により紫外線照射領域を調整することで、不要な領域への紫外線照射をなくし、第２排紙胴２２の表面に付着したインキの固化を防止し、第２排紙胴２２の汚れを抑制することができる。 Further, in the offset sheet-fed printing press according to the first embodiment, 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.
　図９は、本発明の実施例２に係る両面オフセット枚葉印刷機を表す概略構成図である。なお、前述した実施例で説明したものと同様の機能を有する部材には同一の符号を付して重複する説明は省略する。 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. In addition, the same code | symbol is attached | subjected to the member which has the same function as what was demonstrated in the Example mentioned above, and the overlapping description is abbreviate | omitted.
　実施例２の両面オフセット枚葉印刷機は、図９に示すように、給紙部１１１と、裏面印刷部１１２と、表面印刷部１１３と、排紙部１１４とを有し、給紙部１１１と排紙部１１４との間に、裏面印刷部１１２と表面印刷部１１３とが連接部１１５により直列に連結されている。この場合、裏面印刷部１１２は、５つの印刷ユニット１１２ａ，１１２ｂ，１１２ｃ，１１２ｄ，１１２ｅにより構成され、表面印刷部１１３は、印刷ユニット１１３ａ，１１３ｂ，１１３ｃ，１１３ｄ，１１３ｅにより構成されている。 As shown in FIG. 9, the double-sided offset sheet-fed printing machine according to the second embodiment 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. In this case, the back surface printing unit 112 is configured by five printing units 112a, 112b, 112c, 112d, and 112e, and the front surface printing unit 113 is configured by printing units 113a, 113b, 113c, 113d, and 113e.
　上述した構造の印刷機では、給紙部１１１から裏面印刷部１１２に印刷用紙Ｓが供給されると、まず、この裏面印刷部１１２にて、５色のインキ（例えば、シアン、マゼンタ、イエロー、ブラック、ゴールド）が、印刷ユニット１１２ａ，１１２ｂ，１１２ｃ，１１２ｄ，１１２ｅごとに、版胴及びブランケット胴を介して印刷面となる印刷用紙Ｓの裏面に対して転写される。その後、裏面に印刷が施された印刷用紙Ｓが連接部１１５により表面印刷部１１３に搬送される。そして、この表面印刷部１１３にて、前述した裏面印刷部１１２での印刷工程と同じように、５色のインキが、印刷ユニット１１３ａ，１１３ｂ，１１３ｃ，１１３ｄ，１１３ｅごとに、版胴及びブランケット胴を介して印刷面となる印刷用紙Ｓの表面に対して転写される。そして、表裏に印刷が施された印刷用紙Ｓが、排紙部１１４にて排出される。即ち、この両面オフセット枚葉印刷機では、印刷用紙Ｓの裏面に印刷を施した後、この印刷用紙Ｓを反転させることなく、その印刷用紙Ｓの表面に印刷を施すことができる。 In the printing machine having the above-described structure, when the printing paper S is supplied from the paper feeding unit 111 to the back surface printing unit 112, first, 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. Then, in 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.
　このように構成された実施例２の両面オフセット枚葉印刷機にて、連接部１１５には、第１中間胴１１５ａと第２中間胴１１５ｂと第３中間胴１１５ｃが設けられている。この場合、第１中間胴１１５ａは、裏面印刷部１１２の圧胴から受け渡された印刷用紙Ｓの先端を保持して搬送可能であり、第２中間胴１１５ｂは、第１中間胴１１５ａに対接して印刷用紙Ｓの先端を保持して搬送可能であり、第３中間胴１１５ｃは、第２中間胴１１５ｂに対接して印刷用紙Ｓの先端を保持して表面印刷部１１３に搬送可能である。 In the double-sided offset sheet-fed printing press according to the second embodiment configured as described above, the connecting portion 115 is provided with a first intermediate cylinder 115a, a second intermediate cylinder 115b, and a third intermediate cylinder 115c. In this case, 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, and 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. .
　そして、第２中間胴１１５ｂの外周面に対向し、その下方には、紫外線を照射して印刷用紙Ｓに転写されたインキを乾燥させる乾燥装置１３１が配設されている。この乾燥装置１３１は、裏面印刷部１１２でインキが転写された印刷用紙Ｓの裏面に対して紫外線を照射し、印刷用紙Ｓ上のインキを乾燥し、固化することができる。 Further, 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.
　また、排紙部１１４には、第１排紙胴２１と第２排紙胴２２とチェーングリッパ機構２３が設けられている。そして、第２排紙胴２２の外周面に対向し、その上方には、紫外線を照射して印刷用紙Ｓに転写されたインキを乾燥させる乾燥装置１４が配設されている。この乾燥装置１４は、表面印刷部１１３でインキが転写された印刷用紙Ｓの表面に対して紫外線を照射し、印刷用紙Ｓ上のインキを乾燥し、固化することができる。 Further, 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.
　乾燥装置１３１及び乾燥装置１４は、上述した実施例１の乾燥装置１４とほぼ同様の構成であり、詳細な説明は省略する。また、連接部１１５を構成する第１中間胴１１５ａと第２中間胴１１５ｂに対して、実施例１の第１排紙胴２１及び第２排紙胴２２と同様に、シート保持手段、シート保護手段を設けてもよい。 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.
　このように実施例２の両面オフセット枚葉印刷機にあっては、給紙部１１１と裏面印刷部１１２と表面印刷部１１３と排紙部１１４を直列に配置し、裏面印刷部１１２と表面印刷部１１３との間に連接部１１５を設け、連接部１１５の第２中間胴１１５ｂの外周面に対向して紫外線を照射して印刷用紙Ｓに転写されたインキを乾燥させる乾燥装置１３１を配設すると共に、排紙部１１４の第２排紙胴２２の外周面に対向して紫外線を照射して印刷用紙Ｓに転写されたインキを乾燥させる乾燥装置１４を配設している。 As described above, in the double-sided offset sheet-fed printing machine according to the second embodiment, 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. At the same time, 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.
　従って、両面印刷の場合であっても、裏面印刷部１１２から乾燥装置１３１までの距離が最適距離になると共に、表面印刷部１１３から乾燥装置１４までの距離が最適距離になり、印刷品質を向上することができる。 Therefore, even in the case of double-sided printing, 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.
　図１０は、本発明の実施例３に係る両面オフセット枚葉印刷機を表す概略構成図である。なお、前述した実施例で説明したものと同様の機能を有する部材には同一の符号を付して重複する説明は省略する。 FIG. 10 is a schematic configuration diagram showing a double-sided offset sheet-fed printing press according to Example 3 of the present invention. In addition, the same code | symbol is attached | subjected to the member which has the same function as what was demonstrated in the Example mentioned above, and the overlapping description is abbreviate | omitted.
　実施例３の両面オフセット枚葉印刷機は、図１０に示すように、給紙部２１１と、裏面印刷部２１２と、表面印刷部２１３と、排紙部２１４とを有し、給紙部２１１と排紙部２１４との間に、裏面印刷部２１２と表面印刷部２１３とが反転部２１５により直列に連結されている。この場合、裏面印刷部２１２は、４つの印刷ユニット２１２ａ，２１２ｂ，２１２ｃ，２１２ｄにより構成され、表面印刷部２１３は、印刷ユニット２１３ａ，２１３ｂ，２１３ｃ，２１３ｄにより構成されている。この場合、反転部２１５は、両面印刷を実施するとき、印刷の途中で印刷用紙Ｓの表裏と搬送方向を反転させるものであり、２つの第１、第２中間胴２１５ａ，２１５ｂと反転胴２１５ｃとから構成されている。 As illustrated in FIG. 10, the duplex offset sheet-fed printing machine according to the third embodiment 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. In this case, the back surface printing unit 212 includes four printing units 212a, 212b, 212c, and 212d, and the front surface printing unit 213 includes printing units 213a, 213b, 213c, and 213d. In this case, 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.
　上述した構造の印刷機では、給紙部２１１から裏面印刷部２１２に印刷用紙Ｓが供給されると、まず、この裏面印刷部２１２にて、４色のインキ（例えば、シアン、マゼンタ、イエロー、ブラック）が、印刷ユニット２１２ａ，２１２ｂ，２１２ｃ，２１２ｄごとに、版胴及びブランケット胴を介して印刷面となる印刷用紙Ｓの裏面に対して転写される。その後、裏面に印刷が施された印刷用紙Ｓが、反転部２１５にて、第２中間胴２１５ｂから反転胴２１５ｃに渡されるとき、印刷用紙Ｓの表裏と搬送方向が反転させられる。そして、表面印刷部２１３にて、前述した裏面印刷部２１２での印刷工程と同じように、４色のインキが、印刷ユニット２１３ａ，２１３ｂ，２１３ｃ，２１３ｄごとに、版胴及びブランケット胴を介して印刷面となる印刷用紙Ｓの表面に対して転写される。そして、表裏に印刷が施された印刷用紙Ｓが、排紙部２１４にて排出される。即ち、この両面オフセット枚葉印刷機では、印刷用紙Ｓの裏面に印刷を施した後、この印刷用紙Ｓを反転させ、その印刷用紙Ｓの表面に印刷を施すことができる。 In the printing machine having the above-described structure, when the printing paper S is supplied from the paper feeding unit 211 to the back surface printing unit 212, first, 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. Then, in the front surface printing unit 213, as in the printing process in the back surface printing unit 212 described above, four colors of ink are passed through the plate cylinder and the blanket cylinder for each of the printing units 213a, 213b, 213c, and 213d. The image is transferred to the surface of the printing paper S that becomes the printing surface. Then, 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.
　このように構成された実施例３の両面オフセット枚葉印刷機にて、第２中間胴２１５ｂの外周面に対向し、その上方には、紫外線を照射して印刷用紙Ｓに転写されたインキを乾燥させる乾燥装置２３１が配設されている。この乾燥装置２３１は、裏面印刷部２１３でインキが転写された印刷用紙Ｓの裏面に対して紫外線を照射し、印刷用紙Ｓ上のインキを乾燥し、固化することができる。 In the double-sided offset sheet-fed printing machine of Example 3 configured in this way, 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.
　また、排紙部２１４には、第１排紙胴２１と第２排紙胴２２とチェーングリッパ機構２３が設けられている。そして、第２排紙胴２２の外周面に対向し、その上方には、紫外線を照射して印刷用紙Ｓに転写されたインキを乾燥させる乾燥装置１４が配設されている。この乾燥装置１４は、表面印刷部２１３でインキが転写された印刷用紙Ｓの表面に対して紫外線を照射し、印刷用紙Ｓ上のインキを乾燥し、固化することができる。 Further, 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.
　乾燥装置２３１及び乾燥装置１４は、上述した実施例１の乾燥装置１４とほぼ同様の構成であり、詳細な説明は省略する。また、反転部２１５を構成する第１中間胴２１５ａと第２中間胴２１５ｂと反転胴２１５ｃに対して、実施例１の第１排紙胴２１及び第２排紙胴２２と同様に、シート保持手段、シート保護手段を設けてもよい。 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.
　このように実施例３の両面オフセット枚葉印刷機にあっては、給紙部２１１と裏面印刷部２１２と表面印刷部２１３と排紙部２１４を直列に配置し、裏面印刷部２１２と表面印刷部２１３との間に反転部２１５を設け、反転部２１５の第２中間胴２１５ｂの外周面に対向して紫外線を照射して印刷用紙Ｓに転写されたインキを乾燥させる乾燥装置２３１を配設すると共に、排紙部２１４の第２排紙胴２２の外周面に対向して紫外線を照射して印刷用紙Ｓに転写されたインキを乾燥させる乾燥装置１４を配設している。 As described above, in the double-sided offset sheet-fed printing machine according to the third embodiment, 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. At the same time, 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.
　従って、印刷用紙Ｓを途中で反転させる両面印刷の場合であっても、裏面印刷部２１２から乾燥装置２３１までの距離が最適距離になると共に、表面印刷部２１３から乾燥装置１４まで距離が最適距離になり、印刷品質を向上することができる。 Therefore, even in the case of double-sided printing in which the printing paper S is reversed halfway, 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. Thus, the print quality can be improved.
　なお、上述した各実施例では、本発明のシート保持手段を吸着手段とし、この吸着手段を吸引部５１，５２，５３，５４としたが、この構成に限定されるものではない。例えば、シート保持手段を、第２排紙胴２２の外周側からエアを吹き付けて印刷シートを保持するようにしてもよい。また、エアに限らず、ローラ、ベルトなどにより印刷シートを保持するようにしてもよい。また、上述した各実施例では、本発明のシート保護手段をエア噴射手段やガイド部材としたが、この構成に限定されるものではなく、シート保持手段と同様に、エア、ローラ、ベルトなどを利用してもよい。 In each of the above-described embodiments, the sheet holding unit of the present invention is the suction unit and the suction unit is the suction units 51, 52, 53, 54. However, the present invention is not limited to this configuration. For example, the sheet holding unit may hold the print sheet by blowing air from the outer peripheral side of the second paper discharge drum 22. Further, the print sheet may be held not only by air but also by a roller, a belt, or the like. Further, in each of the above-described embodiments, 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.
　また、上述した各実施例では、本発明のシャッタを板状または筒状に構成したが、この形状に限らず、蛇腹式、ロール式などとしてもよい。 Further, in each of the embodiments described above, 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.
　また、上述した各実施例では、圧胴（印刷胴）２０とチェーングリッパ機構（搬送機構）との間に第１排紙胴２１と第２排紙胴２２を設け、第２排紙胴２２の外周面に対向して乾燥装置１４を設けたが、この構成に限定されるものではない。即ち、印刷胴と搬送機構との間には、２つの排紙胴だけでなく、レイアウトなどに応じて３つ以上の排紙胴を設けてもよい。例えば、第１～第５排紙胴を設け、第３排紙胴以降に乾燥装置を設けるように構成してもよい。 In each of the above-described embodiments, 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). Although 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. For example, the first to fifth paper discharge cylinders may be provided, and the drying device may be provided after the third paper discharge cylinder.
　本発明に係る印刷機は、第２排紙胴の外周面に対向して紫外線を照射して印刷シートに転写されたインキを乾燥させる乾燥装置を配設することで、印刷品質の向上を図るものであり、いずれの印刷機にも適用することができる。 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.
　１１　給紙部
　１２　印刷部
　１３　排紙部
　１４　乾燥装置
　２０　圧胴
　２１　第１排紙胴
　２２　第２排紙胴
　２３　チェーングリッパ機構（搬送機構）
　２４　排紙台
　５１，５２，５３，５４　吸引部（シート保持手段、吸着手段）
　５６，５７，５８，５９　吐出部（シート保護手段、エア噴射手段）
　６１　ガイド部材（シート保護手段、エア噴射手段）
　７２，８２　ＵＶ－ＬＥＤ（紫外線照射部）
　７３，７４，８３，８４　シャッタ
　１１１，２１１　給紙部
　１１２，２１２　裏面印刷部
　１１３，２１３　表面印刷部
　１１４，２１４　排紙部
　１１５　連接部
　１１５ｂ，２１５ｂ　第２中間胴
　２１５　反転部
　Ｓ　印刷用紙（印刷シート） DESCRIPTION OF SYMBOLS 11 Paper feed part 12 Printing part 13 Paper discharge part 14 Drying device 20 Pressure drum 21 1st paper discharge drum 22 2nd paper discharge drum 23 Chain gripper mechanism (conveyance mechanism)
24 Discharge stand 51, 52, 53, 54 Suction unit (sheet holding means, suction means)
56, 57, 58, 59 Discharge unit (sheet protection means, air injection means)
61 Guide members (sheet protection means, air injection means)
72,82 UV-LED (ultraviolet irradiation part)
73, 74, 83, 84 Shutter 111, 211 Paper feeding unit 112, 212 Back surface printing unit 113, 213 Front surface printing unit 114, 214 Paper discharge unit 115 Connection unit 115b, 215b Second intermediate cylinder 215 Reversing unit S Printing paper (printing) Sheet)

Claims (9)

  1. 　給紙部と印刷部と排紙部が直列に配置される印刷機において、
    　前記排紙部は、前記印刷部における印刷胴からの印刷シートの先端を保持して搬送可能な第１排紙胴と、該第１排紙胴からの印刷シートの先端を保持して搬送可能な第２排紙胴と、該第２排紙胴から受け取った印刷シートを保持して搬送可能な搬送機構と、該搬送機構により搬送された印刷シートが積み上げられる排紙台とを有し、
    　前記第２排紙胴の外周面に対向して紫外線を照射して印刷シートに転写されたインキを乾燥させる乾燥装置が配設される、
    　ことを特徴とする印刷機。     In a printing machine in which a paper feed unit, a printing unit, and a paper discharge unit are arranged in series,
    The paper discharge unit is capable of holding and transporting a first paper discharge cylinder capable of holding and conveying a leading end of a print sheet from the printing cylinder in the printing unit, and a front end of the print sheet from the first paper discharge cylinder. A second discharge cylinder, a transfer mechanism capable of holding and transferring a print sheet received from the second discharge cylinder, and a discharge tray on which the print sheets transferred by the transfer mechanism are stacked,
    A drying device is disposed so as to dry the ink transferred to the print sheet by irradiating ultraviolet rays so as to face the outer peripheral surface of the second discharge cylinder.
    A printing machine characterized by that.
  2. 　前記印刷胴は、印刷シートにインキが転写されるときに所定の印圧を付与する圧胴であって、該圧胴と前記第２排紙胴とが予め設定された所定距離だけ離間して配置されることを特徴とする請求項１に記載の印刷機。 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 paper discharge cylinder are separated from each other by a predetermined distance. The printing press according to claim 1, wherein the printing press is arranged.
  3. 　前記乾燥装置による紫外線照射位置を搬送される印刷シートの暴れを抑制するシート保持手段が設けられることを特徴とする請求項１または２に記載の印刷機。 The printing press according to claim 1 or 2, further comprising a sheet holding unit that suppresses a runaway of a printing sheet conveyed at an ultraviolet irradiation position by the drying device.
  4. 　前記シート保持手段は、前記第２排紙胴の内部から印刷シートを吸着して保持可能な吸着手段を有することを特徴とする請求項３に記載の印刷機。 4. The printing machine according to claim 3, wherein the sheet holding means has suction means capable of sucking and holding a print sheet from the inside of the second paper discharge cylinder.
  5. 　前記第１排紙胴と印刷シートの印刷面との接触を抑制するシート保護手段が設けられることを特徴とする請求項１から４のいずれか一つに記載の印刷機。 The printing machine according to any one of claims 1 to 4, further comprising a sheet protection unit that suppresses contact between the first discharge cylinder and a printing surface of the printing sheet.
  6. 　前記シート保護手段は、前記第１排紙胴の内部から印刷シートに対してエアを噴射可能なエア噴射手段を有することを特徴とする請求項５に記載の印刷機。 6. The printing machine according to claim 5, wherein the sheet protection means includes air injection means capable of injecting air to the print sheet from the inside of the first discharge cylinder.
  7. 　前記シート保護手段は、前記第１排紙胴から所定距離だけ離間するガイド部材と、印刷シートを該ガイド部材に密着可能なエア噴射手段を有することを特徴とする請求項５に記載の印刷機。 6. The printing machine according to claim 5, wherein the sheet protection unit includes a guide member that is separated from the first discharge cylinder by a predetermined distance, and an air ejection unit that can closely contact the print sheet with the guide member. .
  8. 　表面印刷部と裏面印刷部との間に、印刷シートの先端を保持して搬送可能な第１中間胴と、該第１中間胴からの印刷シートの先端を保持して搬送可能な第２中間胴とが配設され、前記第２中間胴の外周面に対向して紫外線を照射して印刷シートに転写されたインキを乾燥させる乾燥装置が配設されることを特徴とする請求項１から７のいずれか一つに記載の印刷機。 A first intermediate cylinder capable of holding and conveying the front end of the print sheet between the front surface printing unit and the back surface printing unit, and a second intermediate capable of conveying while holding the front end of the print sheet from the first intermediate cylinder A drying apparatus is provided for drying the ink transferred to the printing sheet by irradiating ultraviolet rays facing the outer peripheral surface of the second intermediate cylinder. 8. The printing machine according to any one of 7.
  9. 　前記乾燥装置は、前記第２排紙胴または前記第２中間胴の軸方向に沿って配列される複数の紫外線照射部と、該複数の紫外線照射部の一部を隠蔽可能なシャッタとを有することを特徴とする請求項１から８のいずれか一つに記載の印刷機。 The drying device includes a plurality of ultraviolet irradiation units arranged along an axial direction of the second discharge cylinder or the second intermediate cylinder, and a shutter capable of concealing a part of the plurality of ultraviolet irradiation units. The printing press according to any one of claims 1 to 8, wherein
PCT/JP2010/059212 2009-07-31 2010-05-31 Printing machine WO2011013442A1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104742497A (en) * 2013-12-31 2015-07-01 江苏昌昇集团股份有限公司 Double-face multicolor hard pressing soft offset press
CN105667067A (en) * 2014-11-19 2016-06-15 江苏昌昇集团股份有限公司 Offset press for large folio double-sided thin paper

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013107296A (en) * 2011-11-22 2013-06-06 Mitsubishi Heavy Industries Printing & Packaging Machinery Ltd Floating prevention device of sheet, sheet printing machine, and floating prevention method
JP2014046522A (en) * 2012-08-30 2014-03-17 Fujifilm Corp Drying device and image forming apparatus
CN103802450B (en) * 2014-01-27 2016-04-20 虎彩印艺股份有限公司 Register lock-up in a kind of printing equipment and localization method thereof
DE102015116491A1 (en) * 2014-09-30 2016-03-31 manroland sheetfed GmbH Sheet-fed rotary offset printing machine with facilities for the uniform drying of double-sided printed sheets
CN104924748A (en) * 2015-06-01 2015-09-23 铜陵方正塑业科技有限公司 Printing device
CN105346202B (en) * 2015-11-05 2018-06-12 浙江特美新材料股份有限公司 Printing machine and its printing process in cork paper embossing machine
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DE102016204547A1 (en) 2016-03-18 2017-09-21 Koenig & Bauer Ag Method for configuring a drying device in a printing machine and a printing machine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03293133A (en) * 1990-04-11 1991-12-24 Toppan Printing Co Ltd Offset sheet printer with ultraviolet dryer and offset printing
JPH1058653A (en) * 1996-07-20 1998-03-03 Heidelberger Druckmas Ag Rotary press with apparatus for treating surface of sheet
JP2001354345A (en) * 2000-06-12 2001-12-25 Mitsubishi Heavy Ind Ltd Sheet guide device of printer
JP2005022398A (en) * 2003-06-13 2005-01-27 Mitsubishi Heavy Ind Ltd Perfecting sheet-fed printing machine
JP2008207369A (en) * 2007-02-23 2008-09-11 Mitsubishi Heavy Ind Ltd Printing machine
JP2010089341A (en) * 2008-10-07 2010-04-22 Ryobi Ltd Printing method for printing machine and printing machine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03293133A (en) * 1990-04-11 1991-12-24 Toppan Printing Co Ltd Offset sheet printer with ultraviolet dryer and offset printing
JPH1058653A (en) * 1996-07-20 1998-03-03 Heidelberger Druckmas Ag Rotary press with apparatus for treating surface of sheet
JP2001354345A (en) * 2000-06-12 2001-12-25 Mitsubishi Heavy Ind Ltd Sheet guide device of printer
JP2005022398A (en) * 2003-06-13 2005-01-27 Mitsubishi Heavy Ind Ltd Perfecting sheet-fed printing machine
JP2008207369A (en) * 2007-02-23 2008-09-11 Mitsubishi Heavy Ind Ltd Printing machine
JP2010089341A (en) * 2008-10-07 2010-04-22 Ryobi Ltd Printing method for printing machine and printing machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104742497A (en) * 2013-12-31 2015-07-01 江苏昌昇集团股份有限公司 Double-face multicolor hard pressing soft offset press
CN105667067A (en) * 2014-11-19 2016-06-15 江苏昌昇集团股份有限公司 Offset press for large folio double-sided thin paper

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