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EP0606569A1 - Dispositif de correction des formes d'impression a fin de compenser l'allongement de leur supports - Google Patents

Dispositif de correction des formes d'impression a fin de compenser l'allongement de leur supports Download PDF

Info

Publication number
EP0606569A1
EP0606569A1 EP93119179A EP93119179A EP0606569A1 EP 0606569 A1 EP0606569 A1 EP 0606569A1 EP 93119179 A EP93119179 A EP 93119179A EP 93119179 A EP93119179 A EP 93119179A EP 0606569 A1 EP0606569 A1 EP 0606569A1
Authority
EP
European Patent Office
Prior art keywords
printing form
printing
clamping
receiving
form cylinder
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
EP93119179A
Other languages
German (de)
English (en)
Other versions
EP0606569B1 (fr
Inventor
Willi Becker
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.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger Druckmaschinen 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 Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP0606569A1 publication Critical patent/EP0606569A1/fr
Application granted granted Critical
Publication of EP0606569B1 publication Critical patent/EP0606569B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B41F27/1218—Devices for attaching printing elements or formes to supports for attaching flexible printing formes comprising printing plate tensioning devices
    • B41F27/1225—Devices for attaching printing elements or formes to supports for attaching flexible printing formes comprising printing plate tensioning devices moving in the printing plate end substantially rectilinearly
    • B41F27/1243—Devices for attaching printing elements or formes to supports for attaching flexible printing formes comprising printing plate tensioning devices moving in the printing plate end substantially rectilinearly by pivotal or swivelling motion, e.g. by means of a rocking lever

Definitions

  • the invention relates to a device for receiving printing forms at one end in the printing unit cylinder of a rotary printing press with a shaft passing through a channel of the printing form cylinder, on which receiving components with opposing clamping surfaces are provided for detecting a printing form and a receiving component by means of at least one actuating element against the
  • the force of tension springs acting in the tensioning direction can be pivoted, and a further receiving component has a holding element, by means of which this receiving component is pivoted against the force of a spring when the actuating element is actuated.
  • DE 41 28 994 A1 discloses a clamping and tensioning device for printing presses, through which printing plates are clamped and tensioned.
  • This publication shows that a tensioning strip consists of several sections and a clamping strip consists of several sections arranged side by side.
  • a pressure plate clamped between the opposing clamping surfaces is accordingly fixed within individual partial areas defined by the length of the sections of the clamping strips. If the printing medium is expanded during the printing process by exposure to moisture or by flexing processes in the cylinder gaps of the printing couple cylinders, for example in the axial direction, i.e. parallel to the clamping and tensioning device, compensation of the printing form position is necessary, but this is done with the device according to DE 41 28 994 A1 cannot be achieved.
  • the effect of the expansion of the print carrier can be influenced not only by moisture absorption by the print carrier but also by the position of the wood fiber in the print carrier.
  • a different application of ink to individual sections of the print carrier can also result in a print carrier expansion both in the circumferential direction and in the axial direction.
  • the present invention overcomes the disadvantages of the prior art.
  • the invention has for its object to improve a device for printing form recording in such a way that a printing form in the clamped state can be adapted to changes in the printed image due to the expansion of the print carrier to be processed.
  • this object is achieved in that an expansion shaft passing through a channel of the printing form cylinder, on which individual clamping elements are mounted in a rotationally fixed manner next to one another, can be stretched linearly in the axial direction via actuators as well as twisted in the circumferential direction by prestressing elements acting independently of one another on individual clamping elements.
  • the expansion shaft is rotatably received in cylinder cheeks and to be axially fixed to a support bearing in axial bearings.
  • the expansion shaft is torsionally stable; the individual clamping elements are fastened to the expansion shaft by fastening elements.
  • this allows tensile stresses that cause uniform linear expansions to be introduced into the expansion shaft, starting from the center of the printing form cylinder, while their torsionally unpredictable design allows torsion of individual expansion shaft areas to be largely free of side effects, in order to apply a tension that differs zonally in the circumferential direction.
  • the tensioning elements each consist of a tensioning system and a tensioning lever.
  • the tensioning system also has a lever extension that receives a bolt.
  • the clamping lever which is movable relative to the clamping system, is accommodated on this bolt.
  • the relative movement of the tensioning lever in relation to the tensioning system is brought about by a lever nose of the tensioning lever which is supported on the channel of the printing form cylinder when the tensioning system is deflected hydraulically or pneumatically. This opens the clamping surfaces of the clamping system and clamping lever for the insertion of a printing form.
  • Preloading elements also act on the tensioning system of the tensioning elements. Since the tensioning system is fastened to the torsionally unstable expansion shaft, the position of each tensioning element can be influenced in the circumferential direction by the prestressing elements. On the one hand, pre-tensioning elements designed as adjusting screws can influence the pre-tensioning of a further pre-tensioning element; for example the spring characteristic of a compression spring acting on the lever extension of the tensioning system. On the other hand, pre-tensioning elements designed as set screws can act directly on the tensioning system of the tensioning elements fastened to the expansion shaft. As a result, the printing form tension and thus the printing form expansion in the circumferential direction can be adapted to the different printing medium expansion from printing unit to printing unit.
  • Two cylinder cheeks 2 and 3 are embodied on a printing form cylinder 1, each of which accommodates a radial bearing 9.
  • a radial bearing 9 In the radial bearing 9, an expansion shaft 5 extending through a channel 4 in the printing forme cylinder 1 is received.
  • the expansion shaft 5 is supported in the middle by a support bearing 6, which is fastened with retaining screws 7 in the printing unit cylinder 1.
  • Radial bearings 10 are provided in the support bearing 6, which receive the expansion shaft 5 there.
  • 16 individual clamping elements 15 are received on both sides of a central element, which are fixed in position on the expansion shaft by retaining bolts 17.
  • the individual clamping elements 15 can be set independently of one another.
  • expansion limiting rings 13 are fastened to the expansion shaft 5 on the inside thereof.
  • an adjusting element 11 for example designed as an adjusting nut
  • Both threaded sections are secured by a scale 12 each.
  • the scaling 12 enables the travel to be read.
  • a printing form end located on the printing form cylinder 1 in the clamped state is to be adapted to the extent of a printing medium in the axial direction
  • the printer moves the adjusting elements 11 in the direction of the cylinder cheeks 2 and 3.
  • the axial bearings 8 rest on the outer sides of the cylinder cheeks 2 and 3, as a result of which the expansion shaft 5 is placed under tension on both sides.
  • the axial bearings 8 provided on the support bearing 6 are fitted without play in the fork-shaped projections of the support bearing 6.
  • a plurality of support bearings 6 can also be provided across the width of the printing form cylinder 1.
  • the expansion shaft 5 is then axially fixed to the central support bearing 6, while the other support bearings 6 permit axial movement.
  • a further increase in tension by turning the adjusting elements 11 causes the tensioning elements 15 located next to the middle element 16 to be displaced outward in the direction of the cylinder cheeks 2 and 3. Since the displacement paths covered by the individual tensioning elements 5 progressively advance from the inside to the outside add each, the outermost clamping elements 15 travel the furthest distance. Accordingly, the expansion shaft 5 expands linearly on both sides from the inside to the outside, and thus, since the individual tensioning elements 15 assume positions fixed thereon, a linear displacement of the individual tensioning elements 15 increases linearly from the inside to the outside.
  • Figure 2 shows a cross section through the channel of a printing unit cylinder and through a clamping element.
  • a tensioning element 15 comprises a tensioning system 19 and a tensioning lever 20.
  • a lever extension 22 is embodied on the tensioning system 19, which receives a bolt 29 and forms a contact surface below an adjusting screw 23 and a spring 24.
  • the tensioning lever 20 which can be pivoted about the bolt 29 of the lever extension 22 has a lever nose 21, which comes into contact with a deflection of the clamping lever 20 below a projection of the channel 4.
  • a pneumatic unit 28 is accommodated in the printing form cylinder 1, the plunger of which acts on the clamping system 19. Above the pneumatic unit 28, tension springs 25 are let into the printing form cylinder 1, which act on the tensioning elements 15.
  • a printing form 18 is received at its folded end in the clamping element 15; the pneumatic unit 28 is inactive, the tension of the printing form 18 on the jacket of the printing form cylinder 1 takes place via the tension springs 25, which act on the individual tensioning elements 15.
  • the angled edge of the printing form 18 is received between the clamping system 19 and the clamping lever 20.
  • the clamping in this state is due to the fact that clamping spring 27 received in a recess 26 of the clamping system 19 press the clamping lever 20 around the bolt 29 against the clamping system 19 and thus cause a clamping of the printing form 18.
  • each clamping element 15 can be twisted in the circumferential direction by the adjusting screw 23 acting on a compression spring 24 and influencing its pretension. Due to the spring force acting on the lever extension 22, the tensioning system 19 is twisted around the torsionally unstable expansion shaft, which results in a zonal expansion possibility of the printing form 18 in the circumferential direction. Since each clamping element 15 has an adjusting screw 23 including spring 24, the printing form 18 can be delicately influenced in the circumferential direction, as well as different clamping forces can be set from printing unit to printing unit, either by changing the spring preload or by the adjusting screw 23 itself In addition to the indirect action via the spring 24, the adjusting screw 23 can also act directly on the Act on the contact surface on the lever extension 22.
  • the torsional instability of the expansion shaft 5 ensures that the tensions which are individually set in the circumferential direction are transmitted to the printing form 18 and, for example, at the edge zones of the printing form 18 cause them to expand by a few tenths of a millimeter in the circumferential direction in order to compensate for a corresponding expansion of the printing medium in the circumferential direction .
  • the clamping of the printing form 18 is released by acting on the pneumatic unit 28.
  • the extending plunger removes the pretension exerted by the tension spring 25 and thus relaxes the printing form 18.
  • the lever nose 21 abuts against a projection of the channel 4, whereby this compresses the clamping spring 27 when the clamping system 19 is rotated further and, when the clamping lever 20 is rotated about the bolt 29 in this way, releases the clamping of the printing form 18 at its angled edge.
  • the printing form 18 can thus be removed from the clamping elements 15.
  • FIG. 3 shows an enlarged section of a printing form cylinder with a special clamping lever configuration.
  • a movable tensioning lever 20.1 is mounted in the lever extension 22 on the tensioning system 19, which is rotatably mounted on the expansion shaft 5 via the retaining bolt 17.
  • the clamping lever 20.1 has a different configuration than the clamping lever 20 and is able to clamp a printing form 18 which has not been folded over on the clamping system 19.
  • a lever head is formed on the clamping lever 20.1, which presses the end of the printing form onto the upper edge of the clamping system 19 and thus generates the clamping force.
  • the biasing forces acting on the lever extension 22 can be adjusted via the adjusting screw 23 and the spring 24 analogously to FIG.
  • expansions of the pressure carrier in the axial direction and / or in the circumferential direction can accordingly be compensated for by releasing the printing form clamping by its expansion. This can be done individually on each printing unit, since the dimensions of the printing medium can vary from printing unit to printing unit.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
EP93119179A 1992-12-28 1993-11-29 Dispositif de correction des formes d'impression a fin de compenser l'allongement de leur supports Expired - Lifetime EP0606569B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4244279 1992-12-28
DE4244279A DE4244279C2 (de) 1992-12-28 1992-12-28 Druckformkorrektureinrichtung zum Ausgleich von Druckträgerdehnungen

Publications (2)

Publication Number Publication Date
EP0606569A1 true EP0606569A1 (fr) 1994-07-20
EP0606569B1 EP0606569B1 (fr) 1996-10-16

Family

ID=6476672

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93119179A Expired - Lifetime EP0606569B1 (fr) 1992-12-28 1993-11-29 Dispositif de correction des formes d'impression a fin de compenser l'allongement de leur supports

Country Status (4)

Country Link
US (1) US5367954A (fr)
EP (1) EP0606569B1 (fr)
JP (1) JP3307749B2 (fr)
DE (2) DE4244279C2 (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9401760U1 (de) * 1994-02-03 1994-03-17 Heidelberger Druckmaschinen Ag, 69115 Heidelberg Plattenzylinder von Rotationsdruckmaschinen
DE19507368C1 (de) * 1995-03-03 1996-03-21 Heidelberger Druckmasch Ag Vorrichtung zum Spannen von Druckformen auf dem Formzylinder einer Rotationsdruckmaschine
DE19515843C1 (de) * 1995-04-29 1996-06-27 Heidelberger Druckmasch Ag Vorrichtung zum Spannen einer Druckplatte auf einem Plattenzylinder von Rotationsdruckmaschinen
DE19515845A1 (de) * 1995-04-29 1996-10-31 Heidelberger Druckmasch Ag Vorrichtung zum Spannen der Hinterkante einer Druckplatte im Plattenzylinder von Rotationsdruckmaschinen
DE19634947C1 (de) * 1996-08-29 1998-01-08 Roland Man Druckmasch Justiervorrichtung für Druckplatten
JP3199168B2 (ja) * 1997-01-09 2001-08-13 リョービ株式会社 印刷機の刷版クランプ装置
DE10009667B4 (de) 1999-03-19 2004-06-03 Heidelberger Druckmaschinen Ag Spanneinrichtung zum Aufspannen von Druckformen
DE10056195A1 (de) * 1999-12-13 2001-06-28 Heidelberger Druckmasch Ag Vorrichtung zum Spannen der Hinterkante einer Druckplatte im Plattenzylinder von Rotationsdruckmaschinen
DE10151052C1 (de) * 2001-09-26 2003-02-06 Roland Man Druckmasch Spannvorrichtung für eine Druckform
DE102004052823A1 (de) * 2004-11-02 2006-05-04 Koenig & Bauer Ag Vorrichtung zum Klemmen und Spannen des nachlaufenden Endes einer Druckplatte
CN101204869B (zh) * 2006-12-22 2013-05-08 海德堡印刷机械股份公司 具有印版操作装置的印刷机
DE102008007376A1 (de) * 2008-02-01 2009-08-13 Manroland Ag Druckwerk für eine Rotationsdruckmaschine
DE102013218657A1 (de) * 2013-09-18 2015-03-19 Koenig & Bauer Aktiengesellschaft Verfahren zum Recken eines auf einen Zylinder einer Rotationsdruckmaschine aufgespannten Zylinderaufzuges
DE102014218834B4 (de) * 2014-09-18 2017-06-29 Koenig & Bauer Ag Vorrichtung zum Anpassen eines Zylinderaufzugs an eine Bedruckstoffänderung in einer Druckmaschine
DE102014019783B4 (de) 2014-09-18 2018-10-25 Koenig & Bauer Ag Vorrichtung zum Anpassen eines Zylinderaufzugs an eine Bedruckstoffänderung in einer Druckmaschine
DE102015204857A1 (de) * 2015-03-18 2016-09-22 Koenig & Bauer Ag Verfahren zum Anpassen mindestens eines Druckbildes und/oder mindestens eines Zylinderaufzugs an eine Bedruckstoffänderung in einer Druckmaschine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2101173A (en) * 1936-08-26 1937-12-07 Willard Mfg Corp Plate clamp
FR1571193A (fr) * 1967-06-30 1969-06-13
FR2182115A1 (fr) * 1972-04-27 1973-12-07 Roland Offsetmaschf
DE4128994A1 (de) * 1990-12-31 1992-07-02 Heidelberger Druckmasch Ag Klemm- und spanneinrichtung
EP0493772A1 (fr) * 1990-12-31 1992-07-08 Heidelberger Druckmaschinen Aktiengesellschaft Dispositif de serrage et dispositif tendeur

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2225016C3 (de) * 1972-05-23 1976-01-29 Koenig & Bauer Ag Vorrichtung zum aufspannen von biegsamen druckplatten auf formzylinder von rotationsdruckmaschinen
DE2606773C3 (de) * 1976-02-19 1984-06-20 Erich 4600 Dortmund Bock Vorrichtung zum Befestigen und Spannen einer biegsamen Druckplatte auf einem bzw. einen Formzylinder einer Rotationsdruckmaschine
DE3626936C1 (de) * 1986-08-08 1988-02-11 Koenig & Bauer Ag Plattenklemmeinrichtung
EP0663292B2 (fr) * 1989-08-04 2000-03-29 Komori Corporation Dispositif de fixation des clichés pour une machine à imprimer sur feuilles
US5182994A (en) * 1989-08-04 1993-02-02 Komori Corporation Plate lockup apparatus for sheet-fed press
DE3936459C1 (fr) * 1989-11-02 1991-04-18 Man Roland Druckmaschinen Ag, 6050 Offenbach, De

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2101173A (en) * 1936-08-26 1937-12-07 Willard Mfg Corp Plate clamp
FR1571193A (fr) * 1967-06-30 1969-06-13
FR2182115A1 (fr) * 1972-04-27 1973-12-07 Roland Offsetmaschf
DE4128994A1 (de) * 1990-12-31 1992-07-02 Heidelberger Druckmasch Ag Klemm- und spanneinrichtung
EP0493772A1 (fr) * 1990-12-31 1992-07-08 Heidelberger Druckmaschinen Aktiengesellschaft Dispositif de serrage et dispositif tendeur

Also Published As

Publication number Publication date
US5367954A (en) 1994-11-29
DE59304197D1 (de) 1996-11-21
JPH06226953A (ja) 1994-08-16
EP0606569B1 (fr) 1996-10-16
JP3307749B2 (ja) 2002-07-24
DE4244279A1 (de) 1994-06-30
DE4244279C2 (de) 1995-05-18

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