EP0201747B1 - Device for the parallel tensioning of printing plates in a printing machine - Google Patents

Device for the parallel tensioning of printing plates in a printing machine Download PDF

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Publication number
EP0201747B1
EP0201747B1 EP86105310A EP86105310A EP0201747B1 EP 0201747 B1 EP0201747 B1 EP 0201747B1 EP 86105310 A EP86105310 A EP 86105310A EP 86105310 A EP86105310 A EP 86105310A EP 0201747 B1 EP0201747 B1 EP 0201747B1
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EP
European Patent Office
Prior art keywords
tensioning
bar
cylinder
pressure bar
clamping
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.)
Expired - Lifetime
Application number
EP86105310A
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German (de)
French (fr)
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EP0201747A3 (en
EP0201747A2 (en
Inventor
Manfred Herold
Herbert Rebel
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Manroland AG
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MAN Roland Druckmaschinen AG
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Publication date
Application filed by MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Priority to AT86105310T priority Critical patent/ATE49925T1/en
Publication of EP0201747A2 publication Critical patent/EP0201747A2/en
Publication of EP0201747A3 publication Critical patent/EP0201747A3/en
Application granted granted Critical
Publication of EP0201747B1 publication Critical patent/EP0201747B1/en
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    • 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
    • B41F27/1231—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 translatory motion substantially tangential to support surface

Definitions

  • the invention relates to a device for parallel clamping of printing plates on a plate cylinder according to the preamble of the first claim.
  • the rear tensioning rail can only be tensioned with an increased tensioning path from a relaxed position advanced against its channel wall with a quick-action clamping mechanism with lever transmission in the cylinder circumferential direction. If the clamping screws in the rear clamping rail are not loosened exactly the same distance during the preparatory work for clamping a new pressure plate, then the rear clamping rail, which is not precisely guided on the side, is tilted during quick clamping and the rear pressure plate end is pulled obliquely, which means that the pressure plate is sensitive on one side is stretched and warps. It is then no longer possible to clamp the plate precisely, since the plastic deformation can no longer be undone by subsequent correction using the clamping screws.
  • the quick release mechanism known from DE-PS 2 754 080 does not have a series connection of a quick release device for pre-tensioning and tensioning device for the final tensioning. In this way, tilting of the rear tensioning rail can be avoided, because the rapid mounting of the pressure plate with a precisely defined tension takes place with a single adjustment process by parallel guidance of the rear tensioning rail in the cylinder channel by means of a symmetrical scissor arm linkage.
  • this quick release device according to FIG.
  • a quick clamping device for parallel clamping in which an angular rail for clamping printing plates of different printing lengths is arranged in several fixed positions in parallel to the end of the print adjustable and lockable, but only a limited clamping force by one on the Angled rail acting leaf spring can be generated during quick clamping.
  • the device can be equipped with a split tensioning rail, but a section-wise correction of the printed image is not useful because a split rear tensioning rail is coupled again via the quick-action clamping device arranged symmetrically in the cylinder center plane. This means that the functions of quick clamping and final clamping are inseparable, which means that undesired feedback on the clamping force is unavoidable.
  • the invention is therefore based on the object of providing a device which makes it possible, with defined clamping forces, to move a rear continuous or divided clamping rail parallel to its channel wall during quick clamping in the clamping direction, without impairing the final clamping via the quick clamping mechanism and thereby arrange the quick release mechanism in the plate cylinder to save as much space as possible.
  • the advantage of the device is that printing plates can be clamped in parallel with a defined clamping force in order to achieve register accuracy, but at the same time the known correction options for the printed image during final clamping with a split clamping rail and the associated clamping screws are retained.
  • the plate cylinder 1 of a printing press has means for fastening and tensioning printing plates in a cylinder channel 2.
  • these fastening means are designed as a front tensioning rail 3 divided over the length of the plate cylinder 1 and a correspondingly divided rear tensioning rail 4, and are each arranged at the print start 5 and print end 6 of the cylinder channel 2.
  • the divided clamping rails 3, 4 are arranged in a known manner in the cylinder channel 2 and are actuated by means of clamping screws 10, 11.
  • the pressure plate front edge and the pressure plate rear edge are also clamped in a known manner by clamping devices 21, 22 (FIG. 2).
  • the quick release device consists of a pressure bar 9 for the tensioning screws 11 arranged along the cylinder channel 2 in a recess 7 of the plate cylinder 1 running parallel to the channel wall 8.
  • the pressure bar 9 is divided in the rear by an outside of the cylinder center plane parallel to the tensioning screws 11 Clamping rail 4 arranged eccentric 12 along the cylinder channel 2 slidably.
  • a parallel movement in the tensioning direction can be carried out from the pressure bar 9 via specially designed recesses 13 and corresponding elevations, which are designed as pressure rollers 14 on counterparts 15, which lie opposite the tensioning screws 11 supported under the action of a compression spring 16.
  • the depressions 13 in the pressure bar 9 are formed with a slope according to FIG. 3 which is larger and then smaller at the beginning of the tensioning path and runs into a radius R.
  • the divided clamping rails 3, 4 are guided axially displaceably in the cylinder channel 2.
  • the setting angle ⁇ of the eccentric bolt 12 is shown in three positions in FIG. 4.
  • the eccentric bolt 12 carries out a compensating movement by the angle ⁇ with the axial adjustment, while the pressure bar 9 remains in its position or, with a corresponding design, the pressure bar 9 can also carry out the compensating movement.
  • the divided clamping rails 3, 4 are slidably guided in sections in the circumferential direction and parallel or obliquely to the cylinder axis, also overall, in a known manner.
  • a parallel movement in the clamping direction during quick clamping is possible without the known correction possibilities in the circumferential direction and / or in the axial direction being restricted by the quick clamping mechanism.

Landscapes

  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Printers Characterized By Their Purpose (AREA)
  • Ink Jet (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Rotary Presses (AREA)

Abstract

A quick-action plate clamping mechanism for a plate cylinder of a printing press consists of a pressure strip disposed axially in a recess along the gap in the plate cylinder wherein the recess extends behind the plane of the rear gap wall and parallel thereto, the pressure strip being displaceable in the gap by means of an eccentric bolt which is disposed outside the cylinder center plane parallel to the clamp screws in the rear clamping bar and with specially formed recesses in the pressure strip and corresponding projections on a co-acting member being provided which are respectively situated opposite the clamp screws and supported by compression springs thereby enabling a uniform parallel clamping movement to be carried out in the direction of the rear clamping bar.

Description

Die Erfindung betrifft eine Vorrichtung zum parallelen Spannen von Druckplatten auf einem Plattenzylinder gemäß dem Oberbegriff des ersten Patentanspruchs.The invention relates to a device for parallel clamping of printing plates on a plate cylinder according to the preamble of the first claim.

Bei einer aus der JP-A-5 967 007 bekannten Vorrichtung ist von Nachteil, daß Kurvenführungen an einer mittels Exzenterbolzen verschiebbaren Druckleiste aus Erhebungen bestehen, die mit Wölbungen an den Spannschrauben zusammenwirken. Die dabei auftretende gleitende Reibung an den Kurvenführungen erschwert das Schnellspannen. Große Druckplatten sind nur mit großen Kraftanstrengung bei Gefahr des Abscherens des Exzenterbolzen in der Druckleiste oder überhaupt nicht mehr spannbar, weil bei extrem hohen Reibungskräften an der Steigung der Kurve das Aufbringen definierter Spannkräfte zum Schnellspannen der Druckplatte nicht mehr möglich ist.In a device known from JP-A-5 967 007 it is disadvantageous that curve guides on a pressure bar which can be displaced by means of eccentric bolts consist of elevations which interact with curvatures on the tensioning screws. The resulting sliding friction on the curve guides makes quick clamping difficult. Large pressure plates can only be tensioned with great effort when there is a risk of the eccentric pin shearing off in the pressure bar or because there is no longer any possibility of applying defined tension forces for rapid tensioning of the pressure plate when the curve is inclined at extremely high frictional forces.

Bei der aus der DE-OS 2 501 716 bekannten Vorrichtung zum Befestigen einer biegsamen Druckplatte auf dem Plattenzylinder einer Rotationsdruckmaschine sind für einen Klemmvorgang zu einer Klemmfläche senkrechte Bolzen zum Verdrehen tellerförmiger Drehkeile vorgesehen, um in einfacher Weise über die sich am Umfang des Tellers erstreckende Steigung eine andere Höhenlage einer inneren Klemmschiene zu erreichen, welche die Enden der Druckplatte gegen eine obere, mit einer Klemmfläche versehene Plattenspannschiene preßt. Ein Spannen der Druckplatte auf dem Zylinder ist dadurch nicht erreichbar. Dies erfolgt in der üblichen Weise mittels sich an der Grubenwand des Zylinders adstützender Spannschrauben.In the device known from DE-OS 2 501 716 for attaching a flexible printing plate to the plate cylinder of a rotary printing machine, bolts are provided for a clamping process for rotating a plate-shaped rotary wedges in order to easily rotate over the slope extending on the circumference of the plate to reach a different height of an inner clamping rail, which presses the ends of the pressure plate against an upper plate clamping rail provided with a clamping surface. Clamping the pressure plate on the cylinder is therefore not possible. This is done in the usual way by means of tensioning screws which are supported on the pit wall of the cylinder.

Bei der aus der DE-AS 2 200 187 bekannten Vorrichtung ist die hintere Spannschiene aus einer gegen ihre Kanalwand vorgeschobenen entspannten Stellung mit einem Schnellspannmechanismus mit Hebelübersetzung in Zylinderumfangsrichtung nur mit einem vergrößerten Spannweg anspannbar. Sind während der Vorbereitungsarbeiten zum Aufspannen einer neuen Druckplatte die Spannschrauben in der hinteren Spannschiene nicht exakt gleich weit gelöst, dann wird beim Schnellspannen die hintere, seitlich nicht exakt geführte Spannschiene verkantet und das hintere Druckplattenende wird schiefgezogen, was bei empfindlicher Druckplatte bedeutet, daß diese einseitig gedehnt wird und sich verzieht. Ein passergenaues Aufspannen der Platte ist dann nicht mehr möglich, da die plastische Verformung auch durch nachträgliche Korrektur mit Hilfe der Spannschrauben nicht mehr rückgängig gemacht werden kann. Wegen der bereits erwähnten Anordnung von zwei einander entgegenwirkenden Druckfedern, nämlich einer Druckfeder zwischen den Spannschienen und einer Druckfeder zwischen dem Exzenter und einem Schwinghebel, ist auch keine definierte Spannkraft über die Druckplattenbreite bei nicht paralleler Stellung der beiden Spannschienen erreichbar. Das automatische Nachspannen über die Druckfeder zwischen den Spannschienen ist zwar theoretisch möglich, praktisch kann jedoch die erforderliche Spannkraft, insbesondere bei großen Formaten, derart nicht aufgebracht werden. Von Nachteil ist ferner, daß die Lagerung des Schwinghebels sehr stabil sein muß, wodurch ein großer Platzbedarf entsteht.In the device known from DE-AS 2 200 187, the rear tensioning rail can only be tensioned with an increased tensioning path from a relaxed position advanced against its channel wall with a quick-action clamping mechanism with lever transmission in the cylinder circumferential direction. If the clamping screws in the rear clamping rail are not loosened exactly the same distance during the preparatory work for clamping a new pressure plate, then the rear clamping rail, which is not precisely guided on the side, is tilted during quick clamping and the rear pressure plate end is pulled obliquely, which means that the pressure plate is sensitive on one side is stretched and warps. It is then no longer possible to clamp the plate precisely, since the plastic deformation can no longer be undone by subsequent correction using the clamping screws. Because of the already mentioned arrangement of two opposing compression springs, namely a compression spring between the tensioning rails and a compression spring between the eccentric and a rocker arm, no defined tensioning force can be achieved across the pressure plate width when the two tensioning rails are not in a parallel position. The automatic re-tensioning via the compression spring between the tensioning rails is theoretically possible, but in practice the required tensioning force, especially in the case of large formats, cannot be applied in this way. Another disadvantage is that the bearing of the rocker arm must be very stable, which creates a large amount of space.

Der aus der DE-PS 2 754 080 bekannte Schnellspannmechanismus weist keine Reihenschaltung aus einer Schnellspanneinrichtung zum Vorspannen und Spanneinrichtung für das endgültige Spannen auf. Dadurch kann zwar ein Verkanten der hinteren Spannschiene vermieden werden, weil das schnelle Aufspannen der Druckplatte mit genau definierter Spannung mit einem einzigen Stellvorgang durch paralleles Führen der hinteren Spannschiene im Zylinderkanal mittels eines symmetrischen Scherenhebelgestänges erfolgt. Mit dieser Schnellspanneinrichtung ist jedoch gemäß Fig. 1 der Patentschrift kein seitliches Ausrichten und kein Ausrichten abschnittsweise in Umfangsrichtung, parallel oder schräg zur Zylinderachse mehr möglich, wodurch keine Korrektur der durch Spannungen im hygroskopischen Druckgut oder in den elastischen Gummitüchern verändertem Druckbilder und keine Abstimmung einzelner Druckplatten untereinander bei Mehrfarbenmaschinen mehr möglich ist. Gerade auf diese Korrekturen kommt es aber wesentlich an. Außerdem sind die Funktionen Schnellspannen und endgültiges Spannen nicht trennbar, um unerwünschte Rückkopplungen zu vermeiden.The quick release mechanism known from DE-PS 2 754 080 does not have a series connection of a quick release device for pre-tensioning and tensioning device for the final tensioning. In this way, tilting of the rear tensioning rail can be avoided, because the rapid mounting of the pressure plate with a precisely defined tension takes place with a single adjustment process by parallel guidance of the rear tensioning rail in the cylinder channel by means of a symmetrical scissor arm linkage. With this quick release device, however, according to FIG. 1 of the patent specification, no lateral alignment and no alignment in sections in the circumferential direction, parallel or obliquely to the cylinder axis is possible, as a result of which no correction of the print images changed by tensions in the hygroscopic printed matter or in the elastic rubber blankets and no adjustment of individual printing plates with each other in multi-color machines is more possible. It is precisely these corrections that are essential. In addition, the quick release and final release functions are inseparable to avoid unwanted feedback.

Aus der DE-PS 3 127 586 ist eine Schnellspanneinrichtung zum parallelen Spannen bekannt, bei der eine Winkelschiene zum Aufspannen von Druckplatten unterschiedlicher Drucklängen in mehreren festgelegten Stellungen parallel zum Druckende verstell-und arretierbar angeordnet ist, wobei aber nur eine begrenzte Spannkraft durch eine auf die Winkelschiene wirkende Blattfeder beim Schnellspannen erzeugt werden kann. Die Vorrichtung kann gemäß Fig. 2 zwar mit einer geteilten Spannschiene ausgerüstet werden, eine abschnittsweise Korrektur des Druckbildes ist aber deswegen nicht sinnvoll, weil über die in der Zylindermittelebene symmetrisch angeordnete Schnellspanneinrichtung eine geteilte hintere Spannschiene wieder gekoppelt ist. Dadurch sind die Funk: tionen Schnellspannen und endgültiges Spannen nichttrennbar, wodurch unerwünschte Rückkopplungen auf die Spannkraft unvermeidbar sind.From DE-PS 3 127 586 a quick clamping device for parallel clamping is known, in which an angular rail for clamping printing plates of different printing lengths is arranged in several fixed positions in parallel to the end of the print adjustable and lockable, but only a limited clamping force by one on the Angled rail acting leaf spring can be generated during quick clamping. According to FIG. 2, the device can be equipped with a split tensioning rail, but a section-wise correction of the printed image is not useful because a split rear tensioning rail is coupled again via the quick-action clamping device arranged symmetrically in the cylinder center plane. This means that the functions of quick clamping and final clamping are inseparable, which means that undesired feedback on the clamping force is unavoidable.

Der Erfindung liegt deshalb die Aufgabe zugrunde, eine Vorrichtung zu schaffen, die es ermöglicht, mit definierten Spannkräften eine hintere durchgehende oder geteilte Spannschiene parallel zu ihrer Kanalwand beim Schnellspannen in Spannrichtung verschiebbar zu führen, ohne dabei über den Schnellspannmechanismus das endgültige Spannen zu beeinträchtigen sowie dabei den Schnellspannmechanismus möglichst raumsparend im Plattenzylinder anzuordnen.The invention is therefore based on the object of providing a device which makes it possible, with defined clamping forces, to move a rear continuous or divided clamping rail parallel to its channel wall during quick clamping in the clamping direction, without impairing the final clamping via the quick clamping mechanism and thereby arrange the quick release mechanism in the plate cylinder to save as much space as possible.

Gelöst wird diese Aufgabe durch eine Vorrichtung entsprechend dem Kennzeichen des ersten Patentanspruchs. Weiterbildungen der Erfindung ergeben sich aus dem Unteranspruch, der Beschreibung und der Zeichnung.This object is achieved by a device according to the characterizing part of the first claim. Further developments of the invention result from the subclaim, the description and the drawing.

Der Vorteil der Vorrichtung besteht darin, daß Druckplatten mit definierter Spannkraft parallel gespannt werden können, um Passergenauigkeit zu erreichen, zugleich aber beim endgültigen Spannen die bekannten Korrekturmöglichkeiten des Druckbildes mit einer geteilten Spannschiene und den zugehörigen Spannschrauben erhalten bleiben.The advantage of the device is that printing plates can be clamped in parallel with a defined clamping force in order to achieve register accuracy, but at the same time the known correction options for the printed image during final clamping with a split clamping rail and the associated clamping screws are retained.

Die Erfindung wird nachstehend an einem Ausführungsbeispiel näher erläutert. In der zugehörigen Zeichnung zeigt:

  • Fig. 1 eine Draufsicht auf die den Kanal zeigende Seite des Plattenzylinders,
  • Fig. 2 eine im Zylinderkanal des Plattenzylinders angeordnete Plattenspannvorrichtung im Schnitt in vergrößertem Maßstab,
  • Fig. 3 eine Einzelheit der Plattenspannvorrichtung im stark vergrößerten Maßstab,
  • Fig. 4 den Stellwinkel des Exzenterbolzens in drei Positionen der Axialverstellung, im stark vergrößerten Maßstab.
The invention is explained in more detail below using an exemplary embodiment. In the accompanying drawing:
  • 1 is a plan view of the side of the plate cylinder showing the channel,
  • 2 shows a plate clamping device arranged in the cylinder channel of the plate cylinder in section on an enlarged scale,
  • 3 shows a detail of the plate clamping device on a greatly enlarged scale,
  • Fig. 4 shows the setting angle of the eccentric pin in three positions of the axial adjustment, on a greatly enlarged scale.

Der Plattenzylinder 1 einer Druckmaschine weist in einem Zylinderkanal 2 Mittel zum Befestigen und Spannen von Druckplatten auf.The plate cylinder 1 of a printing press has means for fastening and tensioning printing plates in a cylinder channel 2.

Diese Befestigungsmittel sind gemäß Fig. 1 und 2 als vordere über die Länge des Plattenzylinders 1 geteilte Spannschiene 3 und eine entsprechend geteilte hintere Spannschiene 4 ausgebildet und jeweils am Druckanfang 5 und Druckende 6 des Zylinderkanals 2 angeordnet. Die geteilten Spannschienen 3, 4 sind in bekannter Weise im Zylinderkanal 2 angeordnet und werden mittels Spannschrauben 10, 11 betätigt. In den Spannschienen 3, 4 werden ebenfalls in bekannter Weise die Druckplattenvorderkante sowie die Druckplattenhinterkante durch Klemmeinrichtungen 21, 22 geklemmt (Fig. 2).1 and 2, these fastening means are designed as a front tensioning rail 3 divided over the length of the plate cylinder 1 and a correspondingly divided rear tensioning rail 4, and are each arranged at the print start 5 and print end 6 of the cylinder channel 2. The divided clamping rails 3, 4 are arranged in a known manner in the cylinder channel 2 and are actuated by means of clamping screws 10, 11. In the clamping rails 3, 4, the pressure plate front edge and the pressure plate rear edge are also clamped in a known manner by clamping devices 21, 22 (FIG. 2).

Die Schnellspanneinrichtung besteht aus einer längs des Zylinderkanals 2 in einer hinter der Kanalwand 8 parallel zu dieser verlaufenden Aussparung 7 des Plattenzylinder 1 angeordneten Druckleiste 9 für die Spannschrauben 11. Die Druckleiste 9 ist durch einen außerhalb der Zylindermittelebene parallel zu den Spannschrauben 11 in der hinteren geteilten Spannschiene 4 angeordneten Exzenterbolzen 12 längs des Zylinderkanals 2 verschiebbar. Von der Druckleiste 9 ist über darin befindliche besonders gestaltete Vertiefungen 13 und entsprechende Erhebungen, die als Druckrollen 14 an Gegenstücken 15 ausgebildet sind, die den unter der Wirkung einer Druckfeder 16 abgestützten Spannschrauben 11 gegenüberliegen, eine parallele Bewegung in Spannrichtung ausführbar.The quick release device consists of a pressure bar 9 for the tensioning screws 11 arranged along the cylinder channel 2 in a recess 7 of the plate cylinder 1 running parallel to the channel wall 8. The pressure bar 9 is divided in the rear by an outside of the cylinder center plane parallel to the tensioning screws 11 Clamping rail 4 arranged eccentric 12 along the cylinder channel 2 slidably. A parallel movement in the tensioning direction can be carried out from the pressure bar 9 via specially designed recesses 13 and corresponding elevations, which are designed as pressure rollers 14 on counterparts 15, which lie opposite the tensioning screws 11 supported under the action of a compression spring 16.

Die Vertiefungen 13 in der Druckleiste 9 sind mit einer am Anfang des Spannweges größeren und dann kleineren, in einen Radius R auslaufenden Steigung gemäß Fig. 3 ausgebildet.The depressions 13 in the pressure bar 9 are formed with a slope according to FIG. 3 which is larger and then smaller at the beginning of the tensioning path and runs into a radius R.

Die geteilten Spannschienen 3, 4 sind im Zylinderkanal 2 axial verschiebbar geführt. Dabei ist in Fig. 4 der Stellwinkel a des Exzenterbolzens 12 in drei Positionen gezeigt. Der Exzenterbolzen 12 führt eine Ausgleichsbewegung um den Winkel ß mit der axialen Verstellung aus, während die Druckleiste 9 in ihrer Position verbleibt oder bei entsprechender Auslegung kann die Druckleiste 9 auch die Ausgleichsbewegung mit vollziehen.The divided clamping rails 3, 4 are guided axially displaceably in the cylinder channel 2. The setting angle α of the eccentric bolt 12 is shown in three positions in FIG. 4. The eccentric bolt 12 carries out a compensating movement by the angle β with the axial adjustment, while the pressure bar 9 remains in its position or, with a corresponding design, the pressure bar 9 can also carry out the compensating movement.

Außerdem sind die geteilten Spannschienen 3, 4 abschnittsweise in Umfangsrichtung sowie parallel oder schräg zur Zylinderachse, auch insgesamt, in bekannter Weise verschiebbar geführt. Mit der erfindungsgemäßen Vorrichtung ist eine parallele Bewegung in Spannrichtung beim Schnellspannen möglich, ohne daß durch den Schnellspannmechanismus die bekannten Korrekturmöglichkeiten in Umfangsrichtung und/oder in axialer Richtung eingeschränkt werden.In addition, the divided clamping rails 3, 4 are slidably guided in sections in the circumferential direction and parallel or obliquely to the cylinder axis, also overall, in a known manner. With the device according to the invention, a parallel movement in the clamping direction during quick clamping is possible without the known correction possibilities in the circumferential direction and / or in the axial direction being restricted by the quick clamping mechanism.

BezugszeichenlisteReference symbol list

  • 1 Plattenzylinder1 plate cylinder
  • 2 Zylinderkanal2 cylinder channel
  • 3 vordere geteilte Spannschiene3 front split clamping rails
  • 4 hintere geteilte Spannschiene4 rear split clamping rails
  • 5 Druckanfang5 Start of printing
  • 6 Druckende6 end of print
  • 7 Aussparung7 recess
  • 8 Kanalwand8 channel wall
  • 9 Druckleiste9 print bar
  • 10 Spannschraube10 clamping screw
  • 11 Spannschraube11 clamping screw
  • 12 Exzenterbolzen12 eccentric bolts
  • 13 Vertiefungen13 wells
  • 14 Druckrolle14 pressure roller
  • 15 Gegenstück15 counterpart
  • 21 Klemmeinrichtung21 clamping device
  • 22 Klemmeinrichtung22 clamping device

Claims (2)

1. Device for parallel tensioning of printing plates on the plate cylinder (1) of printing presses with a front and a rear tensioning bar (3, 4) in the cylinder channel (2) of the plate cylinder (1) against which the printing plate ends can be tensioned and which are movable essentially in the peripheral direction of the plate cylinder (1) by tensioning bolts (10, 11) lying apart from one another in the axial direction, wherein the tensioning bolts (10) directly support the front clamping bar (3) against the oppositely standing channel wall and the rear tensioning bar (4) is tensionable from a detensioned position pushed towards its channel wall (8) using a rapid tensioning device which has a series arrangement of a rapid tensioning mechanism for pretensioning and then tensioning bolts (10, 11) for final tensioning, wherein as rapid tensioning mechanism along the cylinder channel (2) in a recess (7) running behind the plane of the channel wall (8) and parallel to this of the plate cylinder (1) a pressure bar (9) is arranged on which the tensioning bolts (11 ) of the rear tensioning bar (4) are supported, furthermore cam guides are introduced on the pressure bar (9) and the pressure bar (9) is displaceable by means of eccentric pins (12) pivoted in the rear tensioning bar (4) in the direction of the cylinder channel (2) characterised in that the pressure bar (9) has depressions (13) cam shaped as cam guides which, in each case, lie opposite the tensioning bolts (11) against the rear side of the pressure bar (9) supported under the action of the compression spring (16) against the front side of the pressure bar (9) and that the cam shaped depressions (13) have compression rollers (14) arranged in them which are linked longitudinally of the cylinder channel (2) to counterpieces (15), whereby the pressure bar (9) together with the rear tensioning bar (4) is moved in the tensioning direction on rotation of the eccentric bolt (12) by means of the pressure rolls (14) rolling off on the cam shaped depressions (13), while the tensioning bolts (11) slide without rising on the pressure bar (9).
2. Apparatus according to Claim 1, characterised in that the cam shaped depressions (13) in the pressure bar (9) are constructed with an inclination larger at the beginning of the tensioning path and then smaller running out into a radius (R) (Fig. 3).
EP86105310A 1985-05-09 1986-04-17 Device for the parallel tensioning of printing plates in a printing machine Expired - Lifetime EP0201747B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86105310T ATE49925T1 (en) 1985-05-09 1986-04-17 DEVICE FOR PARALLEL CLAMPING OF PRINTING PLATES ON THE PLATE CYLINDER OF PRINTING MACHINES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853516682 DE3516682A1 (en) 1985-05-09 1985-05-09 DEVICE FOR PARALLELLY TENSIONING PRINTING PLATES ON THE PLATE CYLINDER OF PRINTING MACHINES
DE3516682 1985-05-09

Publications (3)

Publication Number Publication Date
EP0201747A2 EP0201747A2 (en) 1986-11-20
EP0201747A3 EP0201747A3 (en) 1987-12-23
EP0201747B1 true EP0201747B1 (en) 1990-01-31

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EP86105310A Expired - Lifetime EP0201747B1 (en) 1985-05-09 1986-04-17 Device for the parallel tensioning of printing plates in a printing machine

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US (1) US4688484A (en)
EP (1) EP0201747B1 (en)
JP (1) JPH0825267B2 (en)
AT (1) ATE49925T1 (en)
BR (1) BR8602277A (en)
DE (1) DE3516682A1 (en)

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Also Published As

Publication number Publication date
JPH0825267B2 (en) 1996-03-13
DE3516682A1 (en) 1986-11-13
EP0201747A3 (en) 1987-12-23
ATE49925T1 (en) 1990-02-15
DE3516682C2 (en) 1988-06-01
BR8602277A (en) 1987-01-21
US4688484A (en) 1987-08-25
EP0201747A2 (en) 1986-11-20
JPS6211648A (en) 1987-01-20

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