EP0660778A1 - Procede et dispositif visant a evacuer des plaques d'impression. - Google Patents

Procede et dispositif visant a evacuer des plaques d'impression.

Info

Publication number
EP0660778A1
EP0660778A1 EP93920648A EP93920648A EP0660778A1 EP 0660778 A1 EP0660778 A1 EP 0660778A1 EP 93920648 A EP93920648 A EP 93920648A EP 93920648 A EP93920648 A EP 93920648A EP 0660778 A1 EP0660778 A1 EP 0660778A1
Authority
EP
European Patent Office
Prior art keywords
plate
printing plate
printing
cylinder
beginning
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP93920648A
Other languages
German (de)
English (en)
Other versions
EP0660778B1 (fr
Inventor
Wolfgang Guenter Ruckmann
Erich Georg Wieland
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koenig and Bauer AG
Original Assignee
Koenig and Bauer AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Koenig and Bauer AG filed Critical Koenig and Bauer AG
Publication of EP0660778A1 publication Critical patent/EP0660778A1/fr
Application granted granted Critical
Publication of EP0660778B1 publication Critical patent/EP0660778B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F27/00—Devices for attaching printing elements or formes to supports
    • B41F27/12—Devices for attaching printing elements or formes to supports for attaching flexible printing formes
    • B41F27/1206—Feeding to or removing from the forme cylinder

Definitions

  • the invention relates to a method and a device for removing printing plates from plate cylinders of rotary printing presses in accordance with the preamble of claims 1 and 5.
  • Actuators are held. This is disadvantageous in that these adjustable plate pressure rollers, plus their actuating devices, both make access to the plate cylinder more difficult and require additional equipment. In addition, it occupies a large part of the circumference of the plate cylinder with the aforementioned devices, so that only a limited number of rollers, for. B. inking rollers, may be present on the plate cylinder or the plate cylinder must be oversized. Furthermore, according to the above-mentioned EP 02 14 549 B1, it is disadvantageous that a driven guide roller is used in the plate feed process, which is in contact with the sensitive side of the pressure plate. This can lead to damage to this sensitive side of the printing plate, in particular if the feeding speed of the printing plate can be changed, as is done according to EP 02 14 549 B1 by the acceleration and subsequent deceleration of the plate feeding.
  • the invention has for its object to provide a method for removing printing plates from a plate cylinder of a rotary printing press, and a device for performing the method.
  • Ink application rollers have a multiple function.
  • a variety of inking rollers can be placed on the plate cylinder.
  • FIG. 1 to 4 each show a schematic side view of a feed and discharge device according to the invention for printing plates in different positions of the plate cylinder;
  • Fig. 5 is an enlarged detail
  • Fig. 6 is an illustration of the beginning of the plate
  • Fig. 7 is a control device
  • Fig. 8 is a flow chart for the removal of a
  • FIG. 1 A flow chart for feeding a printing plate to the plate cylinder
  • FIG. 10 shows a section X - X according to FIG. 6 with an enlarged detailed illustration according to FIG. 2.
  • a rotary printing machine has several printing units 1, z. B. four printing units, each containing a plate cylinder 2, a Gumrni tuchzyl i nder 3 and a Ge end ruck zyli nd he 4. Furthermore, a number of inking rollers 6, 7, 8 and a dampening and inking roller 9 are arranged on the circumference of the plate cylinder 2, which can be adjusted to the plate cylinder 2 by known means, not shown. With the rollers 6 to 9, unspecified rubbing rollers are still in connection.
  • the cylinders 2 to 4 and rollers 6 to 9 are mounted dirext or indirectly in side frames.
  • a discharge and feed device 12 for printing plates 13, 14 is provided on a Switzerlandansseite 11 to the cylinders 2, 3, 4 of the printing unit 1.
  • This device 12 consists of an approximately printing plate-wide housing with two storage shafts 16, 17.
  • the housing viewed in section, has a slight curvature such that an upper part of the housing is initially oriented almost vertically and a lower part approximately in cross section expanded trapezoidal and runs in the direction of plate cylinder 2.
  • a front wall 18 of the housing extends over a pressure roller 19.
  • the pressure roller 19 is approximately below the
  • the pressure roller 19 has a soft relative to a pressure plate 13, 14
  • the rear wall 23 of the housing extends to just before the last inking roller 8 above one
  • Plate cylinder 2 touches, so that the rear wall 23 has a larger radius Krümmun than the front wall 18th
  • Partition 26 arranged which the two
  • the intermediate wall 26 is however shorter than the walls
  • the air channels 28, 29 are through to the front wall
  • the air duct walls 32, 33, the front and rear walls 18, 23 and the intermediate wall 26 are each connected by end faces 34, which are symbolically represented by two tabs - shown in detail in Fig. 1. These end faces 34 extend from the upper part running in the vertical direction to the end of the trapezoidally enlarged part of the removal and supply device 12 on the periphery of the plate cylinder 2.
  • the transport device 27 comprises a driven transport roller 36 which is fixed on the end face and which has comb-like cutouts in the axial direction on its periphery, into which fingers 37 engage, which are attached at approximately a right angle to the lower end of the intermediate wall 26.
  • This transport roller 36 is driven by a motor, e.g. B. a torque adjustable
  • a pressure roller 38 which can be adjusted at the lower end of the storage shaft 17 for printing plates 13 to be removed is arranged, which is connected to the piston rod of a working cylinder 41 which is also fixed to the rear wall via an angle lever 39 which is mounted on the rear wall.
  • an adjustable pressure roller 42 is arranged at the lower end of the storage shaft 16 for pressure plates 14 to be supplied, which roller is attached via a front-mounted angle lever to the piston rod of an also front-side mounted Working cylinder 44 is connected.
  • the pressure rollers 38, 42 have a soft, elastic surface, e.g. B. made of rubber.
  • a guide bar 46 which is trapezoidal in cross section and extends in the axial direction of the plate cylinder 2.
  • the underside and the top of the guide bar 46 are each concave and the radius of the plate cylinder 2 or the transport roller 36 aligned.
  • a first end face 47 of the guide bar 46 forms below the spotting seal 27 the boundary of the spoke shaft 16 for plate feed relative to the front wall 18.
  • a second end face 48 of the guide bar 46 forms below the transport device 27 the boundary of the storage shaft 17 for plate feed ung opposite the rear wall 23, or the lower end of the rear wall 23 pointing in the direction of the plate cylinder 2 is arranged at such a distance, forming an introduction 49, from the line of contact 24 of the last inking roller 8 seen in the direction of rotation with the plate cylinder 2 that the printing plate to be removed 13 is introduced into this introduction 49 and can be further promoted through the storage shaft 17.
  • This insertion 49 tapers from the plate cylinder 2 in the direction of the transport device 27 and thus runs in a wedge shape in cross section.
  • the Plattenvo rderkante-Ausr ichteemheit 52 consists of a rotatable shaft 53 mounted in the end faces 34 of the discharge and feed device 12 with at least two dowel pins or register stops 51 protruding from the periphery of this shaft 53 in the radial direction, with fitting devices 54 at the beginning of the pressure plates 13, 14 kor espondi ren.
  • the shaft 53 is connected via a link 50 via a joint to the piston rod of an articulated working cylinder 55 fixed to the front wall.
  • the discharge and feed device 12 can be pivoted vertically upwards for repair and maintenance purposes of the printing unit 1 by two bearings 56, 57 fixed to the frame by means of a rocker 59 articulated on the front wall 18 and a double-armed lever 60 articulated on the front wall 18.
  • the double-armed lever 60 is connected to the piston rod of a rigid working cylinder 62 by its first lever arm 58 via a set bearing and by its second lever arm 61 via a joint.
  • the plate cylinder 2 has a plate clamping device 64 and a plate clamping and clamping device 66 in a pit 63.
  • a plate clamping device 64 and a plate clamping and clamping device 66 in a pit 63.
  • Such a device is known from DE 36 04 071 C2.
  • On the plate clamps 64, 66 of the plate cylinder 2 are in the vicinity of the periphery of the plate cylinder 2 openable and closable clamping flaps or gripper devices 67, 68 are arranged, each with a gripper he cooperate on the bearing surface 70.
  • the gripper device 67 is always connected to the front edge, ie the start of the print, and the gripper device 68 is connected to the rear edge, ie the print end of the respective pressure plate 13, 14.
  • actuating means for actuating the Zifer device 67, 68 or the Plattenspannvor direction 64, 66 are supplied with working medium via a rotary introduction, not shown, on a pin of the plate cylinder 2. It is also possible to provide devices which supply the plate cylinder 2 with a working medium via its end face or lateral surface.
  • the actuating means can be designed as hydraulic, pneumatic or ele tric units.
  • the gripper device 67, 68 is usually designed as a gripper on the rail.
  • the printing plate should be changed.
  • the plate cylinder 2 moves with the application rollers 6 to 9 at the beginning 69 of the printing plate 13 past the application rollers 9, 6, 7, further up to a contact line 24 between the in
  • the new printing plate 14 is fed with its printing plate start 72 to the plate cylinder 2 and fastened thereon.
  • the end of the printing plate 13 reaches the line of contact 24 between the last application roller 8 and the plate cylinder 2 with the Intermediate end of the pressure plate 13.
  • the gripper device 67 opens and the pressure roller 38 presses the pressure plate 13 with its flexible coating against the driven transport roller 36, so that the pressure plate 13 is further conveyed in the vertical direction to the outlet of the discharge and feed device 12 .
  • the application rollers 6 to 9 can be turned off (Fig. 3).
  • the printing plate 14 is further applied by rotating the plate cylinder 2.
  • the beginning of the plate removal from the plate cylinder 2 can also take place in such a way that after reaching between the circumference of the
  • the plate feed of a new printing plate 14 to the plate cylinder 2 is shown in more detail below.
  • the pressure plate 14 to be fed is inserted with its pressure plate start 72 into the storage night 16 of the discharge and feed device 12 when the pressure roller 42 of the transport device 27 is not in contact, and engages with its fitting slots 54 located at the start of the plate into the shaft 53 located on the shaft 53 and into the lower part of the Memory shaft 16 protruding dowel pins 51, whereby the printing plate 14 is aligned.
  • the pressure plate 14 is thus on the plate alignment unit 52 in the waiting position (FIG. 1).
  • the pressure roller 42 and the transport roller 36 run with a Circumferential speed, which is the 1.1 to 1.2- fac e of the circumferential speed of the plate cylinder 2, so that the aligned pressure plate 14 is accelerated to the plate cylinder 2 and is fed with the fitting slots 54 against stops or dowel pins 51 which are on the plate cylinder 2, but in particular is mounted on the plate clamping device 64 located in the cylinder pit 63.
  • the gripper then closes a seal 67 and holds the pressure plate start 72 in a positive and non-positive manner.
  • the pressure roller 19, which is provided with a soft, elastic covering, is set against the plate cylinder 2 or against the pressure plate 14 located therebetween (FIG. 2).
  • the plate cylinder 2 now rotates in the direction of product rotation and the pressure roller 42 pressing against the pressure plate 14 is pivoted away and thus brought into the rest position (FIG. 3).
  • the pressure plate 13 to be removed leaves the plate cylinder 2 and the gripper bar 68 thereby opened can grip the end of the pressure plate 14 in a non-positive and positive manner.
  • the pressure roller 19 is turned off.
  • the plate changing process is now complete (Fig. 4).
  • the plate feed for plate cylinders 2 can also take place in such a way that a pressure plate 14 provided with fitting devices 54 at its plate start 72 comes from the storage shaft 16 in the direction of the plate cylinder 2 up to the plate front edge. Alignment unit 52 guided, then aligned there and held in the waiting position. The plate cylinder 2 then interrupts its rotary movement and the transport device 27 consisting of the pressure roller 42 and the driven transport roller 36 conveys the pressure plate 14 in the tangential direction to a gripper bearing surface 70 on the plate cylinder 2 (FIG. 10), on which register stops 51 are arranged .
  • Fig. 7 shows the representation of a control device and a control computer 74.
  • the control computer 74 receives its information on the one hand from a position transmitter 76 for monitoring the presence of the printing plate 13, 14 with its fitting devices 54 on the stop 51 on the plate cylinder 2.
  • the control computer 74 provides information about a position sensor 77 attached to the plate cylinder 2.
  • the control computer 74 is connected to a number of electro-magnetic valves 78 which, upon a command to change the printing plate as a function of the positions of the plate cylinder 2 and in connection with a switch suitable software in the correct order and the working cylinder with working medium, e.g. B. supply compressed air from a pressure source 79. All electric drives, e.g. B.
  • control computer 74 works according to a flow chart (FIGS. 8 and 9), so that the Steps 101 to 107 or 201 to 216 are carried out automatically one after the other.
  • Fig. 8 shows the flowchart for releasing and removing the printing plate 13 from the plate cylinder 2 or inserting it into the storage shaft 17 of the discharge and supply device 12.
  • Plate cylinder pitch A (PZ position A) 105 rotated according to FIG. 1.
  • the beginning 69 of the pressure plate 13 has direct contact with the application roller 8 and the plate cylinder 2 at the contact line 24.
  • the plate tension is switched off in a step 106, the gripper bar 67 of the plate clamping device 69 is opened and the pressure roller 38 is issued by the working cylinder 41.
  • the end of the pressure plate 13 is reached in one step after further rotation of the plate cylinder 2 107 (FIG.
  • FIG. 9 shows a flowchart according to which the control engine 74 works in conjunction with the other position indicators (for example dr enwi n ⁇ elgebe r 77) so that the pressure plate 14 is fed to the plate cylinder 2.
  • a start trigger 201 By actuating a start trigger 201, a query 202 of the safety conditions is carried out (for example, the discharge and supply device 12 is in the working position). Appropriate sensors are then activated. If not all of the conditions for fulfillment are met, an interference signal 203 is generated. When all are met
  • a start warning signal 204 is given for safety reasons.
  • a renewed actuation of the start trigger rs 201 activates the drive 81 of the plate cylinder 2.
  • a subsequent query 205 relates to the presence of a new printing plate 14 in the storage shaft 16, the printing plate start 72 of the printing plate 14 with its fitting devices 54, the stops or dowel pins 51 form-fitting. If the pressure plate 14 is missing, an interference signal 206 is generated. While the plate cylinder 2 with its open gripper device 67 is in a cylinder position C (FIG.
  • the alignment unit 52 is switched off in a step 207 by actuating the working cylinder 55 and at the same time the pressure roller 42 is pressed in the direction of the rotating transport roller 38 by actuating the working cylinder 44.
  • the plate cylinder 2 is rotated into a position C (FIG. 2), so that the printing plate 14 is fed to the plate cylinder 2 at an accelerated rate.
  • the position sensor 76 and the rotary angle sensor 77 are switched on.
  • a step 211 the gripper device 67 is closed and the pressure plate start 72 of the pressure plate 14 is held in a non-positive and positive manner and the pressure roller 19 is pivoted to the periphery of the plate cylinder 2 by means of the working cylinder 21.
  • the pressure roller 38 is switched off by actuating the working cylinder 41.
  • step 213 in which the end of the printing plate 14 lies on the plate cylinder 2 and subsequently in a step 214 through the Gripper bar 68 is held firmly.
  • the pressure plate 14 is tensioned.
  • the pressure roller 19 is turned on in a step 215 by actuation by the working cylinder 21.
  • the plate changing process is finished.
  • an end 216 signal is generated.
  • the working cylinders 21, 41, 44, 55, 62 are designed as double-acting pneumatic working cylinders, the supply and discharge connections for the compressed air are not shown.
  • the plate clamping device 64 arranged in the cylinder pit 63 for fastening the pressure plate start 69, 72 can also be designed as a combined plate clamping and tensioning device.
  • the inking roller 8 can also be designed as a separate roller, i. H. for example, perform the function of a deflecting roller and can be actuated separately, d. H. from the inking rollers 6, 7, 9 can be adjusted separately to the plate cylinder 2.
  • Fig. 10 shows a section X - X of FIG. 6 with an enlarged detail representation according to Fi. 2.
  • a circle 83 with the radius r runs for the circumference of the plate cylinder 2 with its outer surface.
  • a Radisu r 2 extends from the axis of rotation 82 of the plat enzyli nders 2 another circle 84 that almost reaches the gripper support surface 70. The radius is smaller than the radius r _,.
  • the storage slot 16 points at his part near the plate cylinder has a shaft end 86 which extends tangentially to a circle 83 or 84, the radius of which lies between the radius r. and r "lies.
  • the shaft end 86 extends tangentially to the plate cylinder 2 in III. Quadrants of a rectangular coordinate system related to the
  • the storage shaft 17 has on its part near the plate cylinder a shaft end 87 which extends tangentially to a circle 83 or 84, the radius of which lies between the radius r and r.
  • the shaft end 87 extends tangentially to the plate cylinder 2 in the second quadrant of a right-angled coordinate system (FIG. 1).
  • the shaft ends 86, 87 lie opposite each other in the area of two adjacent quadrants II and III. However, they can also face each other in the adjacent quadrants I or IV or I and II.
  • the method can also be used advantageously for printing plates that are folded at one or both ends.
  • the further description is based on a tensioning device according to German patent application P 43 26 248.1 ' .
  • a slotted, rotatable clamping spindle can be found, which is arranged in a pit of a plate cylinder.
  • the front end of the folded printing plate is hooked into a mounting edge of the plate cylinder parallel to the cylinder.
  • the end of the pressure plate is also folded in this case and in the Longitudinal slot of the clamping spindle inserted.
  • This spindle can be used in any combination
  • the folded printing plate end of the printing plate is at the latest when it passes the hooked, bent printing plate beginning - seen in the direction of production rotation - first inking roller 9 of the plurality of inking rollers 9 deposited by the plate cylinder; 6; 7; 8 lifted off.
  • the inking rollers in this case only serve to gently guide the loosened printing plate 13.
  • the inking rollers can rotate while the printing plate is being removed, but they can also stand still. If, as already stated, the beginning of the printing plate has preferably reached the area of the "leading inking rollers 6 to 9", the tensioning spindle is rotated a little in the direction of the printing plate to relax.
  • the pressure plate is relaxed and pushed a little towards the start of the pressure plate, since the bent end of the pressure plate is in the slot of the clamping spindle.
  • the fold line of the pressure plate end is supported either on the inner wall of the hanging strip or on the surface of the folded plate start facing the clamping spindle.
  • the pressure plate end preferably remains in this position ("pressure plate loosened ”) until the bent beginning of the printing plate in the suspended state has reached the area of the last guide roller, here the inking roller 8.
  • the tensioning spindle undergoes a further rotation in the direction of the printing plate and relaxes and pushes the printing plate end still in the slot
  • the folded end of the pressure plate automatically lifts out of the hanging bar due to its resilient properties and springs with its entire edging over the jacket of the plate cylinder 2.
  • the rebound through the last roller for example the inking roller 8
  • the beveled end of the pressure plate is automatically moved out of the slot in the tensioning shaft by the resilient properties of the pressure plate and is thereby completely free of the tensioning spindle.
  • the clamping spindle can be brought into any position, e.g. B. in that the clamping spindle has a toothing on its circumference, into which a toothing a rack, which is attached below the clamping spindle, can be moved into any position and held in it by means of an inflatable tube.
  • a corresponding rotation of the clamping spindle follows in accordance with the displacement of the rack.
  • the tension of a compression spring which acts on the rack on the side opposite the air hose, is used for tensioning. If the air hose is depressurized, this compression spring moves the tensioning spindle over the rack in the direction of the pressure plate.
  • Printing unit side frame plate cylinder blanket cylinder impression cylinder - inking roller inking roller inking roller inking and dampening roller - access side discharge and feed device pressure plate, pressure plate to be discharged, feeder - storage chute, feeder (14) storage chute, discharge (13) front wall pressure roller (backing lever lever) (19) angle bracket 8, 2) - - partition air duct air duct - Opening air duct wall air duct wall front side (12)

Landscapes

  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)

Abstract

Dans un procédé et un dispositif visant à évacuer et à amener des plaques d'impression (13, 14), il s'agit d'amener délicatement le côté véhiculant la couleur d'une plaque d'impression jusqu'à un cylindre de plaque (2) ou bien de l'en évacuer. Selon l'invention, c'est possible lors de l'évacuation, du fait qu'au moins un rouleau en creux (6, 7, 8, 9) appuie sur la plaque d'impression qui se trouve sur le cylindre de plaque; que le début de la plaque d'impression (69) est ensuite dégagé et qu'il est inséré de manière élastique dans un puits de stockage (17) en raison de sa propre élasticité. Il est ensuite acheminé plus loin à l'aide d'un dispositif de transport.
EP93920648A 1992-09-18 1993-09-17 Procede et dispositif visant a evacuer des plaques d'impression Expired - Lifetime EP0660778B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4231900 1992-09-18
DE4231900 1992-09-18
PCT/DE1993/000878 WO1994006630A1 (fr) 1992-09-18 1993-09-17 Procede et dispositif visant a evacuer des plaques d'impression

Publications (2)

Publication Number Publication Date
EP0660778A1 true EP0660778A1 (fr) 1995-07-05
EP0660778B1 EP0660778B1 (fr) 1996-12-27

Family

ID=6468663

Family Applications (2)

Application Number Title Priority Date Filing Date
EP93920645A Expired - Lifetime EP0660776B1 (fr) 1992-09-18 1993-09-16 Procede visant a amener des plaques d'impression
EP93920648A Expired - Lifetime EP0660778B1 (fr) 1992-09-18 1993-09-17 Procede et dispositif visant a evacuer des plaques d'impression

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP93920645A Expired - Lifetime EP0660776B1 (fr) 1992-09-18 1993-09-16 Procede visant a amener des plaques d'impression

Country Status (5)

Country Link
US (2) US5555811A (fr)
EP (2) EP0660776B1 (fr)
JP (2) JPH08501036A (fr)
DE (4) DE4394496D2 (fr)
WO (2) WO1994006628A1 (fr)

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JP4904018B2 (ja) 2004-05-04 2012-03-28 ハイデルベルガー ドルツクマシーネン アクチエンゲゼルシヤフト 刷版搬送のための方法及び装置
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EP2552697B1 (fr) * 2010-10-07 2014-03-19 Koenig & Bauer AG Unité d'impression avec un système de transport et système logistique dans une imprimerie
CN102950882B (zh) * 2011-08-26 2017-04-12 海德堡印刷机械股份公司 用于更换印版的方法和装置
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Also Published As

Publication number Publication date
WO1994006628A1 (fr) 1994-03-31
JPH08501038A (ja) 1996-02-06
DE59304916D1 (de) 1997-02-06
WO1994006630A1 (fr) 1994-03-31
DE59304918D1 (de) 1997-02-06
DE4394496D2 (de) 1995-09-21
EP0660778B1 (fr) 1996-12-27
DE4394497D2 (de) 1997-07-24
US5540151A (en) 1996-07-30
EP0660776A1 (fr) 1995-07-05
JPH08501036A (ja) 1996-02-06
US5555811A (en) 1996-09-17
EP0660776B1 (fr) 1996-12-27

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