JP2014100819A - Printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a printer which can suppress increase of the load of an operator and the time for preparation while preventing deterioration of the accuracy of the printing register even when three types of printing, i.e. screen printing, off-set printing and intaglio printing, are performed to a single sheet.SOLUTION: A printer 100 comprises a screen printing unit 120 having an impression cylinder 121 holding and conveying a sheet 100 and a rotary screen cylinder 122 coming into facing contact with the impression cylinder 121, first to fourth off-set printing units 130A to 130D arranged in the downstream of the screen printing unit 120 in the direction of carrying a sheet 1 and an intaglio printing unit 140 arranged in the downstream of the first to fourth off-set printing units 130A to 130D in the direction of carrying the sheet 1.

Description

  The present invention relates to a printing press.

  For example, the following Patent Document 1 proposes a printing machine that can continuously perform inline printing of offset printing and intaglio printing.

JP-A-2-187337

  In recent years, printing combined with screen printing has been performed from the viewpoint of diversification of printed matter and high added value. For this reason, when performing offset printing, intaglio printing, and screen printing on one sheet, after performing offset printing and intaglio printing with the printing machine proposed in Patent Document 1 above, the screen printing machine Screen printing must be performed, and offset printing and intaglio printing sheets must be transferred to the screen printing machine and screen printing must be performed again. There is a problem that the burden on the person and the preparation time increase.

  For these reasons, the present invention can reduce the burden on the operator while preventing a decrease in the accuracy of printing registration even when performing three types of printing: screen printing, offset printing, and intaglio printing on a single sheet. An object of the present invention is to provide a printing machine capable of suppressing an increase in preparation time.

  In order to solve the above-described problems, a printing machine according to the present invention includes a screen printing unit having a pressure drum that holds and conveys a sheet, a rotary screen cylinder that contacts the pressure drum, and the screen printing unit. A conveyance cylinder which is disposed downstream in the conveyance direction of the sheet and receives and holds and conveys the sheet from the screen printing unit; a rubber cylinder which is in contact with the conveyance cylinder; and a plate which is in contact with the rubber cylinder An offset printing unit having a cylinder, a pressure cylinder that is disposed downstream of the offset printing unit in the sheet conveyance direction, receives and holds the sheet from the offset printing unit, and conveys the impression cylinder. And an intaglio printing unit having an intaglio cylinder in contact with the intaglio cylinder.

  The printing press according to the present invention is characterized in that in the printing press described above, the rotary screen cylinder of the screen printing unit is disposed so as to be in contact with a side of the impression cylinder.

  According to the printing machine according to the present invention, since three types of printing, screen printing, offset printing, and intaglio printing, can be performed continuously inline, the burden on the operator and preparation are prevented while preventing a reduction in printing registration accuracy. An increase in time can be suppressed.

1 is a schematic configuration diagram of a main embodiment of a printing press according to the present invention. It is an extraction enlarged view of the principal part of the rotary screen printing unit of FIG.

  Embodiments of a printing press according to the present invention will be described with reference to the drawings. However, the present invention is not limited to only the following embodiments described with reference to the drawings.

[Main embodiments]
A main embodiment of a printing press according to the present invention will be described with reference to FIGS.

  As shown in FIG. 1, a transfer cylinder 120a is disposed on the front end side of a feeder board 111 of a sheet feeding device 110 that is a sheet supply unit that supplies sheets 1 one by one. The sheets 1 from the feeder board 111 can be received one by one through a swing device (not shown). The transfer cylinder 120a is in contact with the transfer cylinder 120a. The transfer cylinder 120b is in contact with the transfer cylinder 120b. The transfer cylinder 120d is in contact with the transfer cylinder 120c.

  A pressure drum 121 of the screen printing unit 120 is in contact with the lower side of the transfer drum 120d. In other words, the transfer cylinder 120 d is in contact with the impression cylinder 121 so as to be positioned above the impression cylinder 121. A rotary screen cylinder 122 is in contact with a side of the impression cylinder 121 that is downstream of the contact position with the transfer cylinder 120d in the rotation direction.

  As shown in FIG. 2, the rotary screen cylinder 122 is replaced with a holding device (sheet holding device) 121b of the impression cylinder 121 from the transfer cylinder 120d, and the other of the sheet 1 conveyed on the impression cylinder 121. The screen can be printed in the direction.

  The rotary screen cylinder 122 is wound with a screen 122a, which is a cylindrical plate material in which small holes are etched according to a pattern, and both ends are supported by a frame so that the screen 122a can move in the radial direction. A squeegee shaft 122b for supplying squeegee or varnish (liquid for screen printing), and a squeegee 122c for extruding the ink or varnish supplied from the squeegee shaft 122b through a small hole of the screen 122a and supplying the squeegee shaft 122b to the impression cylinder 121 side The squeegee portion is constituted by the squeegee 122c and the squeegee shaft 122b, and the angle (squeegee installation angle) θ between the horizontal plane H passing through the tip of the squeegee 122c and the squeegee 122c is 0 °. The squeegee portion is set so as to satisfy the above (θ ≧ 0 °).

  A gap guard 121c having a guide surface 121ca having substantially the same curvature as the outer peripheral surface of the impression cylinder 121 is provided between one end and the other end of the notch 121a of the impression cylinder 121. The gap cylinder 121c is disposed so as to cover the cutout portion 121a and the outer peripheral surface of the pressure drum 121 is continuous, and the rotary screen drum 122 can be prevented from falling into the cutout portion 121a. It is like that.

  The holding device 121b is disposed in the notch 121a of the pressure drum 121, and the claw 121bb can be opened and closed by the rotation of the claw shaft 121ba to hold and release the sheet. ing. On the outer surface of the claw 121bb, there is a guide surface 121bba having substantially the same curvature as the outer peripheral surface of the impression cylinder 121 so as to be continuous with the outer peripheral surface of the impression cylinder 121 at one end portion of the notch 121a. Thus, the rotary screen cylinder 122 can be prevented from falling into the notch 121a or dented by the claw 121bb, and the life of the screen 122a can be extended. ing.

  As shown in FIG. 1, a conveyance cylinder 130 a is in contact with the pressure drum 121 of the screen printing unit 120 on the downstream side in the rotation direction from the position of contact with the rotary screen cylinder 122. The transfer drum 130a is in contact with the transfer drum 130a. The rotary screen cylinder 122 is disposed between the pressure drum 121 at a downstream side in the rotational direction from the contact position with the rotary screen cylinder 122 and an upstream side in the rotation direction from the contact position with the transport cylinder 130a. A dryer 151 which is a screen printing drying means for drying the screen printing surface (the other surface) of the screen-printed sheet 1 is disposed.

  An impression cylinder 131Aa for one surface of the first offset printing unit 130A is in contact with the transport cylinder 130b. The impression cylinder 131Aa is in contact with a rubber cylinder 132Aa for one side. A plate cylinder 133Aa for one side is in contact with the rubber cylinder 132Aa. The plate cylinder 133Aa is provided with an ink device 134Aa for one side which is an ink supply means for one side. Such an impression cylinder 131Aa, a rubber cylinder 132Aa, a plate cylinder 133Aa, an inking device 134Aa, and the like constitute an offset printing section for one side of the first printing unit 130A.

  A pressure drum 131Ab for the other surface of the first offset printing unit 130A is in contact with the pressure drum 131Aa on the downstream side in the rotational direction from the position of contact with the rubber drum 132Aa. The impression cylinder 131Ab is in contact with the rubber cylinder 132Ab for the other side. The plate cylinder 133Ab for the other side is in contact with the rubber cylinder 132Ab. The plate cylinder 133Ab is provided with an inking device 134Ab for the other side which is ink supply means for the other side. Such an impression cylinder 131Ab, rubber cylinder 132Ab, plate cylinder 133Ab, inking device 134Ab, and the like constitute an offset printing section for the other side of the first offset printing unit 130A.

  The impression cylinder 131Ba for one side of the second offset printing unit 130B is located downstream of the contact position with the rubber cylinder 132Ab of the impression cylinder 131Ab for the other side of the first offset printing unit 130A. The second printing unit 130B is provided with a one-side rubber cylinder 132Ba, a plate cylinder 133Ba, an inking device 134Ba, and the like in the same manner as the first offset printing unit 130A. The offset printing unit is configured, and the offset printing unit for the other side is configured by including the rubber cylinder 132Bb for the other side, the plate cylinder 133Bb, the inking device 134Bb, and the like.

  The impression cylinder 131Ca for one side of the third offset printing unit 130C is located downstream of the contact position with the rubber cylinder 132Bb of the impression cylinder 131Bb for the other side of the second offset printing unit 130B. The third offset printing unit 130C includes a rubber cylinder 132Ca for one side, a plate cylinder 133Ca, an inking device 134Ca, and the like in the same manner as the first and second offset printing units 130A and 130B. Thus, an offset printing section for one side is configured, and an offset printing section for the other side is configured by including a rubber cylinder 132Cb, a plate cylinder 133Cb, and an inking device 134Cb for the other side.

  The impression cylinder 131Da for one side of the fourth offset printing unit 130D is located downstream of the contact position with the rubber cylinder 132Cb of the impression cylinder 131Cb for the other side of the third offset printing unit 130C. The fourth offset printing unit 130D includes a rubber cylinder 132Da for one side, a plate cylinder 133Da, an inking device 134Da, and the like in the same manner as the first to third offset printing units 130A to 130C. Thus, an offset printing section for one side is configured, and an offset printing section for the other side is configured by including a rubber cylinder 132Db, a plate cylinder 133Db, an inking device 134Db, and the like for the other side.

  A conveyance cylinder 140a is in contact with the pressure cylinder 131Db for the other surface of the fourth offset printing unit 130D on the downstream side in the rotation direction from the contact position with the rubber cylinder 132Db. A conveying cylinder 140b is in contact with the conveying cylinder 140a. The conveyance cylinder 140c is in contact with the conveyance cylinder 140b. A conveyance cylinder 140d is in contact with the conveyance cylinder 140c.

  The offset printing units 130 </ b> A to 130 </ b> D are disposed between the conveyance cylinder 140 a between the contact position with the rubber cylinder 132 </ b> Db in the rotation direction and the contact position with the conveyance cylinder 140 b in the rotation direction. A drier 152 that is one-side offset printing drying means for drying one side of the sheet 1 that has been offset-printed by the one-side offset printing unit is disposed.

  The offset printing units 130 </ b> A to 130 </ b> D are disposed between the transport cylinder 140 b on the downstream side in the rotational direction from the contact position with the transport cylinder 140 a and the upstream side in the rotational direction with respect to the contact position with the transport cylinder 140 c. A drier 153 that is an offset printing drying means for the other side for drying the other side of the sheet 1 that has been offset printed by the offset printing unit for the other side is disposed.

  A transfer drum 140e is in contact with the transfer drum 140d. The impression cylinder 141 of the intaglio printing unit 140 is in contact with the transfer cylinder 140e. An intaglio cylinder 142 is in contact with the impression cylinder 141. An ink collecting cylinder 143 is in contact with the intaglio cylinder 142. A plurality (five in this embodiment) of ink form cylinders 144 are in contact with the ink collecting cylinder 143 in the circumferential direction. Ink devices 145 for supplying ink are respectively arranged on the peripheral surface side of these ink form cylinders 144. A wiping roller 146 is in contact with the intaglio cylinder 142.

  A discharge drum 161 of a discharge device 160 that is a sheet discharge unit is in contact with the pressure drum 141 on the downstream side in the rotation direction from the contact position with the intaglio cylinder 142. The paper discharge drum 161 is provided with a sprocket (not shown) coaxially. An endless paper discharge chain 162 provided with a plurality of hooks is wound around the sprocket. Below the paper discharge chain 162, a plurality of (three in this embodiment) paper discharge trays 163A to 163C are arranged along the traveling direction of the paper discharge chain 162.

  Further, in the vicinity of the impression cylinder 131Da for one side of the fourth offset printing unit 130D, for one side for inspecting the printing state of one side of the sheet 1 held and conveyed by the impression cylinder 131Da. The inspection camera 171 is disposed. The pressure drum 141 of the intaglio printing unit 140 is downstream in the rotational direction with respect to the position of contact with the ink collecting drum 143 and the upstream of the position of contact with the paper discharge drum 161 of the paper discharge device 160. Between the two sides, an inspection camera 172 for the other side that inspects the printing state of the other side of the sheet 1 held and conveyed by the impression cylinder 141 is disposed.

  In the present embodiment, the first to fourth offset printing units 130A to 130D constitute an offset printing unit of the printing press according to the present invention.

  Next, the operation of the printing press 100 according to this embodiment will be described.

  When the sheets 1 are fed one by one from the sheet feeding device 110, the sheets 1 are transferred from the feeder board 111 to the impression cylinder 121 of the screen printing unit 120 via the transfer cylinders 120a to 12d. While being held and conveyed with the other side facing the front side, the first screen is printed on the other side by the rotary screen 122 and dried by the dryer 151, and then the first offset via the conveyance cylinders 130a and 13b. The pressure drum 131Aa for one side of the printing unit 130A is held so that one side faces the front side.

  When the sheet 1 passes between the impression cylinder 131Aa and the rubber cylinder 132Aa, the ink transferred from the inking device 134Aa to the surface of the rubber cylinder 132Aa via the plate cylinder 133Aa It is transferred to one surface of the sheet 1 held on the peripheral surface of the impression cylinder 131Aa.

  The sheet 1 offset-printed on one surface on the impression cylinder 131Aa is conveyed and replaced by the impression cylinder 131Ab, and is held by the impression cylinder 131Ab with the other surface facing the front side. .

  When the sheet 1 passes between the impression cylinder 131Ab and the rubber cylinder 132Ab, the ink transferred from the inking device 134Ab to the surface of the rubber cylinder 132Ab through the plate cylinder 133Ab It is transferred to the other surface of the sheet 1 held on the peripheral surface of the impression cylinder 131Ab.

  The sheet 1 offset-printed on the other side of the impression cylinder 131Ab is conveyed and replaced with the impression cylinder 131Ba of the second offset printing unit 130B so that one side faces the front side. It is held by the impression cylinder 131Ba.

  Subsequently, in the second offset printing unit 130B, the sheet 1 is offset printed on one side and then offset printed on the other side in the same manner as the first offset printing unit 130A, and then the third offset printing unit 130B. Passed to the offset printing unit 130C.

  Hereinafter, the sheet 1 is subjected to offset printing in the third and fourth offset printing units 130C and 130D in the same manner as in the first offset printing unit 130A, and then replaced with the transport cylinder 140a. The ink which has been offset-printed on one side is dried by the dryer 152 for one side while being held and conveyed by the conveyance cylinder 140a with one side facing the front side, and then replaced with the conveyance cylinder 140b. By doing so, the ink on which the other surface is offset printed is dried by the dryer 153 for the other surface while being transported while being held by the transport cylinder 140b so that the other surface faces the front side.

  Next, the sheet 1 is replaced by the impression cylinder 141 of the intaglio printing unit 140 via the transfer cylinder 140e via the conveying cylinders 140c and 140d, so that the other side faces the front side. And held on the peripheral surface of the impression cylinder 141.

  Each ink in the inking device 145 is transferred to the ink collecting cylinder 143 via the ink form cylinder 184 and supplied to the intaglio cylinder 142, and the excess is removed by the wiping roller 186.

  Then, when the sheet 1 passes between the impression cylinder 141 and the intaglio cylinder 142, the ink supplied to the intaglio plate of the intaglio cylinder 142 is held on the peripheral surface of the impression cylinder 141. After being transferred to the other surface of the sheet 1, the sheet 1 is conveyed by being held by the claw hooks of the paper discharge chain 162 via the paper discharge drum 161 a of the paper discharge device 160.

  The sheet 1 conveyed by the paper discharge chain 162 is inspected by the inspection cameras 171 and 172, and when the printing state is normal, the sheet 1 is discharged and stacked on the paper discharge trays 163A and 163B. On the other hand, when the printing state is defective, the sheet is discharged and stacked on the discharge table 163C.

  Therefore, according to the printing press 100 according to the present embodiment, since three types of printing, that is, screen printing, offset printing, and intaglio printing, can be continuously performed inline, an operator can be prevented while preventing a decrease in printing registration accuracy. The increase in burden and preparation time can be suppressed.

  Further, the rotary screen cylinder 122 of the screen printing unit 120 is disposed so as to be in contact with the side of the impression cylinder 121, that is, the impression cylinder 121 is located below the rotary screen cylinder 122. Therefore, even if the screen 122a of the rotary screen cylinder 122 is damaged for some reason at the time of printing, the pressure cylinder 121 or the like is damaged by the screen printing liquid inside the rotary screen cylinder 122. It can be minimized and reliability can be increased.

  The printing press according to the present invention can be used extremely effectively in the printing industry and the like because it can suppress an increase in the burden on the operator and the preparation time while preventing a decrease in the accuracy of printing registration.

DESCRIPTION OF SYMBOLS 1 Sheet | seat 100 Printing machine 110 Paper feeder 111 Feeder board 120 Screen printing unit 120a-120d Transfer cylinder 121 Impression cylinder 122 Rotary screen cylinder 130A 1st offset printing unit 130B 2nd offset printing unit 130C 3rd offset printing unit 130D 4th offset Printing unit 130a, 130b Transport cylinder 131Aa-131Da, 131Ab-131Db Impression cylinder 132Aa-132Da, 132Ab-132Db Rubber cylinder 133Aa-133Da, 133Ab-133Db Plate cylinder 134Aa-134Da, 134Ab-134Db Inking device 140 Intaglio printing unit 140a Intaglio printing unit 140d Transport cylinder 140e Transfer cylinder 141 Impression cylinder 142 Intaglio cylinder 143 Ink collecting cylinder 144 Ink cylinder 145 In Device 146 Wiping roller 151-153 Dryer 160 Paper discharge device 161 Paper discharge drum 162 Paper discharge chain 163A-163C Paper discharge table 171, 172 Inspection camera

Claims (2)

A screen printing unit having an impression cylinder that holds and conveys a sheet, and a rotary screen cylinder that contacts the impression cylinder;
A transfer cylinder disposed downstream of the screen printing unit in the sheet conveyance direction, for receiving and holding the sheet from the screen printing unit and conveying; a rubber cylinder in contact with the conveyance cylinder; and the rubber An offset printing unit having a plate cylinder facing the cylinder;
An intaglio plate having a pressure drum that is disposed downstream of the offset printing unit in the sheet conveyance direction, receives and holds the sheet from the offset printing unit, and conveys the intaglio plate cylinder in contact with the impression cylinder. A printing machine comprising a printing unit. The printing press according to claim 1, wherein
The printing machine, wherein the rotary screen cylinder of the screen printing unit is disposed so as to be in contact with a side of the impression cylinder.

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