EP0683047B1 - Device for mounting a printing plate - Google Patents

Device for mounting a printing plate Download PDF

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Publication number
EP0683047B1
EP0683047B1 EP95103229A EP95103229A EP0683047B1 EP 0683047 B1 EP0683047 B1 EP 0683047B1 EP 95103229 A EP95103229 A EP 95103229A EP 95103229 A EP95103229 A EP 95103229A EP 0683047 B1 EP0683047 B1 EP 0683047B1
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EP
European Patent Office
Prior art keywords
plate cylinder
clamping
clamping rail
strip
leaf springs
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
EP95103229A
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German (de)
French (fr)
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EP0683047A1 (en
Inventor
Ingo Köbler
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Manroland AG
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MAN Roland Druckmaschinen AG
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Publication date
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Publication of EP0683047A1 publication Critical patent/EP0683047A1/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41FPRINTING MACHINES OR PRESSES
    • B41F27/00Devices for attaching printing elements or formes to supports
    • B41F27/12Devices for attaching printing elements or formes to supports for attaching flexible printing formes
    • B41F27/1218Devices for attaching printing elements or formes to supports for attaching flexible printing formes comprising printing plate tensioning devices
    • B41F27/1225Devices 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
    • B41F27/1231Devices 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 printing plates are usually clamped on a plate cylinder between a clamping bar which is fixed with respect to the plate cylinder and a clamping bar which is movably mounted relative to the latter.
  • the mechanism for applying the clamping force between the movable and the fixed terminal block can consist, for example, of an eccentric shaft.
  • Fastening devices for printing plates in which the clamping force is applied by spring elements, are known from JP 3-252A and DE 4 129 831 A1.
  • an upper terminal strip is movably mounted relative to a lower terminal strip which is fixed to the cylinder by means of a degree guide, the upper terminal strip being pressed against the lower terminal strip by compression springs attached in the lower, fixed terminal strip.
  • An eccentric shaft is provided for introducing a new pressure plate or for removing a used pressure plate, by means of which the upper clamping bar is lifted from the lower clamping bar against the force of the spring elements.
  • the movable clamping bar is supported by at least one leaf spring element with respect to the cylinder-fixed clamping bar, this leaf spring element being set in such a way that the holding force for the pressure plate is applied between the movable and the fixed clamping bar.
  • the leaf spring elements provided thus represent the bearing and the spring elements for the terminal strips.
  • the one terminal strip is mounted as a coupling in the manner of a coupling quadrilateral with the two leaf springs as rockers relative to the other clamping strip as a frame.
  • the clamped end of the leaf spring 5 facing surfaces of the terminal block 3 and the bar 6 are made in a slope, so that the leaf spring 5 is held by a curvature of a bias when its other end on the terminal block 3rd lies on.
  • the movable terminal block 4 is formed in this embodiment by the pivotable end of the leaf spring 5.
  • Pressure plate is thus held between the surfaces of the movable clamping bar 4 formed by the pivotable end of the leaf spring 5 and the lower clamping bar 3 by the force of the preloaded leaf spring 5.
  • this shaft is, as shown in FIG. 1, embedded in a groove-shaped groove in the terminal strip 3 below the leaf spring 5.
  • the fastening device for printing plates shown in FIG. 1, consisting of the clamping strip 3 with the leaf spring 5 clamped therein, can either be made in one piece extending over the format width of the plate cylinder 1 or else it can be divided one or more times. Furthermore, it is possible that, for example, the terminal strip 3 extends in one piece over the format width and a plurality of divided leaf springs 5 are attached.
  • the actuating element 8 When the actuating element 8 is designed to release the terminal strip 4 from the terminal strip 3 by bending the leaf spring 5 as an eccentric shaft or a shaft with a flattening, as shown in FIG. 1, this shaft is in a trough-shaped groove in the terminal strip 3 below the leaf spring 5 let in.
  • the terminal strip 3 is designed here as an angle rail with two additional strips 3.1, 3.2.
  • a pair of leaf springs 5 are clamped between two additional strips 3.1 and 3.2 via fastening screws 7 spaced axially apart from one another.
  • the upper terminal block 4 is designed as an angle rail, at the end facing the bottom of the pit 2 via two further strips 4.1, 4.2 and axially spaced fastening screws 7, the ends of the pair of leaf springs 5 are clamped.
  • the upper terminal block 4 is thus movably mounted relative to the lower terminal block 3 via the pair of leaf springs 5 in the manner of a parallel suspension or a parallel rocker (with the terminal block 4 as a coupling).
  • the actuating element 8 guides the upper clamping strip 4, which is guided over the prestressed leaf springs 5, predominantly in a straight vertical manner.
  • the additional bending of the leaf springs 5 results in only a slight horizontal movement.
  • the leaf springs 5 run at an angle to one another in order to achieve an additional pivoting movement of the terminal strip 4 when opening.
  • the upper terminal block 4 is also supported by a pair of leaf springs 5 with respect to the lower terminal block 3.
  • the terminal strip 3 is essentially designed as a U-profile.
  • One end of a leaf spring 5 is clamped vertically offset from one leg of each U-shaped clamping strip 3 by means of strips 3.1, 3.2 and fastening screws 7 spaced apart in the axial direction of the plate cylinder 1.
  • the ends of the leaf springs 5 are attached to the underside of the upper terminal block 4 via two strips 4.1, 4.2 and further fastening screws 7.
  • dashed screws 7 are indicated by dashed lines, which are axially offset in the axial direction of the plate cylinder 1 with respect to the fastening screws 7 penetrating the strips 4.1 and 4.2 from below.
  • the leaf springs 5 result in an anti-parallel rocker with the terminal block 4 as a coupling element.
  • the shaft of the actuating element 8 which is symbolically provided here as an eccentric shaft or as a shaft with a flattened portion, the upper terminal strip 4 is pressed upwards over the strips 4.1, 4.2 against the bias of the leaf springs 5 with a simultaneous slight pivoting movement in the clockwise direction. There is thus a relatively large gap for inserting a new pressure plate between the underside of the upper terminal strip 4 and the correspondingly opposite surface of the strip 3.1.
  • the fastening device shown in FIGS. 3 and 4 is preferably suitable as a tensioning device for the printing end of the plate cylinder 1.
  • the lower clamping bar 3 is preferably movably mounted parallel to the bottom of the pit 2 of the plate cylinder 1 (guide means not shown).
  • a clamping device 9 is arranged between a wall of the pit 2 and the opposite surface of the terminal strip 3 or the bar 3.1, by means of which the terminal strip 3 can be moved in the direction of the center of the pit 2. As a result, a clamped pressure plate is stretched around the outer circumference of the plate cylinder 1.
  • the fastening device according to the invention for printing plates consisting of the terminal strips 3 and 4 and their connection via the leaf springs 5, can be formed in one part but also in several parts over the format width of the plate cylinder 1.

Landscapes

  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Connection Of Plates (AREA)
  • Character Spaces And Line Spaces In Printers (AREA)

Abstract

The device has two clamping strips (3,4) which are connected by at least one pre-tensioned plate spring (5). One clamping strip (4) is in the form of the movable end of a plate spring fixed to the other clamping strip. The one clamping strip is a coupling over at least two plate springs forming a parallelogram with the other clamping strip to form a frame. At least one of the clamping strips is divided over the format width in the plate cylinder's axial direction. The lower clamping strip in the pit (2) of the plate cylinder is movably positioned. The pit contains a tensioning piece (9) for moving the lower clamping strip in the plate cylinder's peripheral direction.

Description

Die Erfindung betrifft eine Vorrichtung zum Befestigen von Druckplatten gemäß dem Oberbegriff von Anspruch 1.The invention relates to a device for fastening printing plates according to the preamble of claim 1.

Bei Bogenoffsetdruckmaschinen werden die Druckplatten auf einem Plattenzylinder in der Regel zwischen einer bezüglich dem Plattenzylinder festen und einer gegenüber dieser beweglich gelagerten Klemmleiste geklemmt. Der Mechanismus zum Aufbringen der Klemmkraft zwischen der beweglichen und der festen Klemmleiste kann beispielsweise aus einer Exzenterwelle bestehen. Ferner ist es aber auch bekannt, die zum Befestigen nötige Klemmkraft zwischen der zylinderfesten und der beweglichen Klemmleiste durch Federelemente aufzubringen, wobei zum Lösen dieser Druckplattenklemmung ein oder mehrere Rückstellelemente entgegen der Kraft dieser Federelemente die bewegliche Klemmleiste von der festen Klemmleiste gelöst wird.In sheet-fed offset printing presses, the printing plates are usually clamped on a plate cylinder between a clamping bar which is fixed with respect to the plate cylinder and a clamping bar which is movably mounted relative to the latter. The mechanism for applying the clamping force between the movable and the fixed terminal block can consist, for example, of an eccentric shaft. Furthermore, it is also known to apply the clamping force required for fastening between the cylinder-fixed and the movable clamping strip by spring elements, one or more restoring elements being released against the force of these spring elements to release the movable clamping strip from the fixed clamping strip in order to release this pressure plate clamping.

Befestigungsvorrichtungen für Druckplatten, bei welchen die Klemmkraft durch Federelemente aufgebracht werden, sind aus der JP 3-252A bzw. der DE 4 129 831 A1 bekannt. Bei der in der erstgenannten Schrift beschriebenen Vorrichtung ist eine obere Klemmleiste beweglich gegenüber einer zylinderfesten unteren Klemmleiste mittels Gradführung gelagert, wobei durch in der unteren, festen Klemmleiste angebrachte Druckfedern die obere Klemmleiste gegen die untere Klemmleiste gedrückt wird. Zum Einführen einer neuen Druckplatte bzw. zum Herausnehmen einer gebrauchten Druckplatte ist eine Exzenterwelle vorgesehen, mittels der die obere Klemmleiste entgegen der Kraft der Federelemente von der unteren Klemmleiste abgehoben wird. Im Falle der in der DE 4 129 831 A1 beschriebenen Schnellklemmvorrichtung ist die obere Klemmleiste zylinderfest montiert sowie die untere Klemmleiste unter Federvorspannung gegen diese gedrückt beweglich gelagert. Auch hier erfolgt das Öffnen dieser Befestigungsvorrichtung durch entgegen der Federkraft wirkende Rückstellelemente.Fastening devices for printing plates, in which the clamping force is applied by spring elements, are known from JP 3-252A and DE 4 129 831 A1. In the device described in the first-mentioned document, an upper terminal strip is movably mounted relative to a lower terminal strip which is fixed to the cylinder by means of a degree guide, the upper terminal strip being pressed against the lower terminal strip by compression springs attached in the lower, fixed terminal strip. An eccentric shaft is provided for introducing a new pressure plate or for removing a used pressure plate, by means of which the upper clamping bar is lifted from the lower clamping bar against the force of the spring elements. In the case of those described in DE 4 129 831 A1 Quick-clamping device, the upper clamping bar is mounted in a cylinder-fixed manner and the lower clamping bar is mounted so that it can be pressed against it under spring preload. Here, too, this fastening device is opened by restoring elements acting counter to the spring force.

Nachteilig bei diesen vorbekannten Befestigungseinrichtungen für Druckplatten ist dabei einerseits der bautechnische Aufwand, um die eine Klemmleiste gegenüber der anderen beweglich zu lagern. Ferner müssen auch, um eine ausreichende Befestigungskraft für die Druckplatte zu gewährleisten, über die Formatbreite von Klemmleiste und Plattenzylinder mehrere Federelemente in entsprechenden Ausnehmungen untergebracht werden, was wiederum fertigungstechnischen Aufwand darstellt.A disadvantage of these previously known fastening devices for printing plates is, on the one hand, the structural outlay in order to mount one terminal strip so that it can move relative to the other. Furthermore, in order to ensure a sufficient fastening force for the printing plate, a plurality of spring elements must be accommodated in corresponding recesses across the format width of the terminal strip and plate cylinder, which in turn represents a manufacturing outlay.

Aus der DE 3 806 526 C2 ist eine aus Blattfedern gebildete Lagerung einer Spannschiene bezüglich dem Plattenzylinder bekannt. Die Blattfeder dienen hier aber nicht dem Befestigen (Klemmen) einer Druckplatte.DE 3 806 526 C2 discloses a mounting of a tensioning rail with respect to the plate cylinder formed from leaf springs. The leaf spring is not used to attach (clamp) a pressure plate.

Aufgabe der vorliegenden Erfindung ist es daher, eine Vorrichtung zum Befestigen von Druckplatten gemäß dem Oberbegriff von Anspruch 1 derartig weiterzubilden, so daß die genannten Nachteile vermieden werden.The object of the present invention is therefore to develop a device for fastening printing plates in accordance with the preamble of claim 1 in such a way that the disadvantages mentioned are avoided.

Gelöst wird diese Aufgabe durch die kennzeichnenden Merkmale von Anspruch 1. Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen.This object is achieved by the characterizing features of claim 1. Further developments of the invention result from the subclaims.

Gemäß der Erfindung ist allgemein vorgesehen, daß die bewegliche Klemmleiste durch wenigstens ein Blattfederelement gegenüber der zylinderfesten Klemmleiste gelagert ist, wobei dieses Blattfederelement derartig unter Vorspannung gestellt ist, so daß dadurch die Haltekraft für die Druckplatte zwischen der beweglichen und der festen Klemmleiste aufgebracht wird. Das oder die erfindungsgemäß vorgesehenen Blattfederelemente stellen somit die Lagerung sowie die Federelemente für die Klemmleisten dar. Bei zwei Blattfedern wird die eine Klemmleiste als Koppel nach Art eines Koppelvierecks mit den beiden Blattfedern als Schwingen gegenüber der anderen Klemmleiste als Gestell gelagert.According to the invention it is generally provided that the movable clamping bar is supported by at least one leaf spring element with respect to the cylinder-fixed clamping bar, this leaf spring element being set in such a way that the holding force for the pressure plate is applied between the movable and the fixed clamping bar. That or the invention The leaf spring elements provided thus represent the bearing and the spring elements for the terminal strips. In the case of two leaf springs, the one terminal strip is mounted as a coupling in the manner of a coupling quadrilateral with the two leaf springs as rockers relative to the other clamping strip as a frame.

Des weiteren erfolgt die Erläuterung von Ausführungsbeispielen der Erfindung anhand der Zeichnungen.Furthermore, exemplary embodiments of the invention are explained with reference to the drawings.

Hierzu zeigen:

Fig. 1 bis 3
drei prinzipielle Ausbildungen der erfindungsgemäßen Befestigungsvorrichtung und
Fig. 4
die geöffnete Befestigungsvorrichtung gemäß Fig. 3.
Show:
1 to 3
three basic designs of the fastening device according to the invention and
Fig. 4
the opened fastening device according to FIG. 3.

Fig. 1 zeigt einen Teil eines Plattenzylinders 1 mit einer darin angebrachten Grube 2. In dieser Grube 2 ist über die Formatbreite des Plattenzylinders 1 sich beispielsweise einteilig erstreckend eine untere Klemmleiste 3 zylinderfest angebracht. An dem oberen und zur Mitte der Grube 2 des Plattenzylinders 1 hin gewandten Seite der unteren Klemmleiste 3 ist zwischen einer Leiste 6 sowie über mehrere axial voneinander beabstandete und in die Klemmleiste 3 eingedrehte Befestigungsschrauben 7 das eine Ende einer Blattfeder 5 eingespannt.1 shows a part of a plate cylinder 1 with a pit 2 mounted therein. In this pit 2, a lower clamping strip 3 is attached, for example, in one piece and extends across the format width of the plate cylinder 1. On the upper and towards the center of the pit 2 of the plate cylinder 1 facing side of the lower terminal block 3, one end of a leaf spring 5 is clamped between a bar 6 and via a plurality of axially spaced fastening screws 7 screwed into the terminal block 3.

Wie in Fig. 1 zu erkennen sind die dem eingespannten Ende der Blattfeder 5 zugewandten Flächen der Klemmleiste 3 sowie der Leiste 6 in einer Schräge verlaufend gefertigt, so daß die Blattfeder 5 durch eine Krümmung einer Vorspannung hält, wenn deren anderes Ende auf der Klemmleiste 3 aufliegt. Die bewegliche Klemmleiste 4 ist in diesem Ausführungsbeispiel durch das schwenkbare Ende der Blattfeder 5 gebildet. Eine zu befestigende und in der Fig. 1 nicht dargestellte Druckplatte wird somit zwischen den Flächen der durch das schwenkbare Ende der Blattfeder 5 gebildeten beweglichen Klemmleiste 4 und der unteren Klemmleiste 3 durch die Kraft der derartig vorgespannten Blattfeder 5 gehalten.As can be seen in Fig. 1, the clamped end of the leaf spring 5 facing surfaces of the terminal block 3 and the bar 6 are made in a slope, so that the leaf spring 5 is held by a curvature of a bias when its other end on the terminal block 3rd lies on. The movable terminal block 4 is formed in this embodiment by the pivotable end of the leaf spring 5. A to be fastened and not shown in FIG. 1 Pressure plate is thus held between the surfaces of the movable clamping bar 4 formed by the pivotable end of the leaf spring 5 and the lower clamping bar 3 by the force of the preloaded leaf spring 5.

Zum Lösen einer befestigten Druckplatte, also zum Abheben der durch das schwenkbare Ende der Blattfeder 5 gebildete Klemmleiste 4 von der Klemmleiste 3 ist eine zwischen Blattfeder 5 und Klemmleiste 3 angeordnete Betätigungsvorrichtungen 8 vorgesehen, die in diesem Ausführungsbeispiel als eine Exzenterwelle bzw. als eine Welle mit einer Abflachung ausgebildet ist. Selbstverständlich können hier auch hydraulische, pneumatische oder anderweitig ausgebildete Betätigungselemente 8 vorgesehen sein.To release a fixed pressure plate, i.e. to lift the clamping strip 4 formed by the pivotable end of the leaf spring 5 from the clamping strip 3, an actuating device 8 is provided between the leaf spring 5 and the clamping strip 3, which in this exemplary embodiment is an eccentric shaft or a shaft a flat is formed. Of course, hydraulic, pneumatic or other actuating elements 8 can also be provided here.

Bei Ausbildung des Betätigungselementes 8 zum Öffnen der beschriebenen Befestigungsvorrichtung als Exzenter- bzw. abgeflachte Welle erfolgte somit ein Aufbiegen der vorgespannten Blattfeder 5 beim Verdrehen der Welle, so daß gegenüber dem das schwenkbare Ende der Blattfeder 5 als die bewegliche Klemmleiste 4 von der entsprechenden Fläche der Klemmleiste 3 abgehoben wird.When the actuating element 8 was designed to open the described fastening device as an eccentric or flattened shaft, the pretensioned leaf spring 5 was thus bent open when the shaft was rotated, so that the pivotable end of the leaf spring 5 as the movable terminal strip 4 from the corresponding surface of the shaft 4 Terminal strip 3 is lifted off.

Ist als Betätigungselement 8 eine Exzenterwelle bzw. eine Welle mit Abflachung vorgesehen, ist sowie in Fig. 1 dargestellt, diese Welle in einer rinnenförmigen Nut in der Klemmleiste 3 unterhalb der Blattfeder 5 eingelassen.If an eccentric shaft or a shaft with flattening is provided as the actuating element 8, this shaft is, as shown in FIG. 1, embedded in a groove-shaped groove in the terminal strip 3 below the leaf spring 5.

Die in Fig. 1 gezeigte Befestigungsvorrichtung für Druckplatten, bestehend aus der Klemmleiste 3 mit der darin eingespannten Blattfeder 5, kann entweder sich über die Formatbreite des Plattenzylinders 1 erstreckend einteilig oder aber auch ein oder mehrfach unterteilt ausgeführt sein. Ferner ist es möglich, daß beispielsweise die Klemmleiste 3 einteilig sich über die Formatbreite erstreckt und mehrere unterteilte Blattfedern 5 angebracht sind.The fastening device for printing plates shown in FIG. 1, consisting of the clamping strip 3 with the leaf spring 5 clamped therein, can either be made in one piece extending over the format width of the plate cylinder 1 or else it can be divided one or more times. Furthermore, it is possible that, for example, the terminal strip 3 extends in one piece over the format width and a plurality of divided leaf springs 5 are attached.

Statt einer zylinderfesten Verankerung der Klemmleiste 3 ist es möglich, durch entsprechende Führungen zwischen der Klemmleiste 3 und dem Boden der Grube des Plattenzylinders 1 die gezeigte Befestigungsvorrichtung für die Registerkorrekturen nahezu in Umfangsrichtung des Plattenzylinders beweglich zu lagern. Wird die Klemmleiste 3 tatsächlich gegenüber dem Plattenzylinder 1 in der Grube 2 fest angebracht, also nicht beweglich für Registerkorrekturen, so eignet sich eine derartige Befestigungsvorrichtung bevorzugt zum Klemmen einer dem Druckanfang zugeordneten Kante einer Druckplatte.Instead of anchoring the terminal strip 3 in a cylinder-fixed manner, it is possible, by appropriate guides between the terminal block 3 and the bottom of the pit of the plate cylinder 1, the mounting device shown for the register corrections to be mounted in a movable manner almost in the circumferential direction of the plate cylinder. If the clamping strip 3 is actually fixed in relation to the plate cylinder 1 in the pit 2, that is to say not movable for register corrections, such a fastening device is preferably suitable for clamping an edge of a printing plate assigned to the start of printing.

Bei Ausbildung des Betätigungselementes 8 zum Lösen der Klemmleiste 4 von der Klemmleiste 3 durch Aufbiegen der Blattfeder 5 als eine Exzenterwelle bzw. eine Welle mit Abflachung ist wie in Fig. 1 dargestellt, diese Welle in einer rinnenförmigen Nut in der Klemmleiste 3 unterhalb der Blattfeder 5 eingelassen.When the actuating element 8 is designed to release the terminal strip 4 from the terminal strip 3 by bending the leaf spring 5 as an eccentric shaft or a shaft with a flattening, as shown in FIG. 1, this shaft is in a trough-shaped groove in the terminal strip 3 below the leaf spring 5 let in.

Fig. 2 zeigt eine weitere bevorzugte Ausführungsvariante der Erfindung. Die Klemmleiste 3 ist hier als Winkelschiene mit zwei zusätzlichen Leisten 3.1, 3.2 ausgebildet. An der Winkelschiene der Klemmleiste 3 sind zwischen zwei zusätzlichen Leisten 3.1 und 3.2 über axial voneinander beabstandete Befestigungsschrauben 7 ein Paar Blattfedern 5 eingespannt. In gleicher Weise ist die obere Klemmleiste 4 als eine Winkelschiene ausgebildet, an deren zum Boden der Grube 2 gewandten Ende über zwei weitere Leisten 4.1, 4.2 und axial voneinander beabstandete Befestigungsschrauben 7 die Enden des Paares der Blattfedern 5 eingespannt sind. Die obere Klemmleiste 4 ist somit gegenüber der unteren Klemmleiste 3 über das Paar der Blattfedern 5 nach Art einer Parallelaufhängung bzw. einer Parallelschwinge (mit der Klemmleiste 4 als Koppel) beweglich gelagert.2 shows a further preferred embodiment variant of the invention. The terminal strip 3 is designed here as an angle rail with two additional strips 3.1, 3.2. On the angle rail of the terminal block 3, a pair of leaf springs 5 are clamped between two additional strips 3.1 and 3.2 via fastening screws 7 spaced axially apart from one another. In the same way, the upper terminal block 4 is designed as an angle rail, at the end facing the bottom of the pit 2 via two further strips 4.1, 4.2 and axially spaced fastening screws 7, the ends of the pair of leaf springs 5 are clamped. The upper terminal block 4 is thus movably mounted relative to the lower terminal block 3 via the pair of leaf springs 5 in the manner of a parallel suspension or a parallel rocker (with the terminal block 4 as a coupling).

An der Unterseite der mit der Klemmleiste 4 verbundenen Leiste 4.2 ist ein sich an der Klemmleiste 3 abstützendes Betätigungselement 8 angebracht, was in Fig. 2 als Exzenterwelle bzw. als Welle mit einer Abflachung dargestellt ist. Die Lagerung der Klemmleiste 4 über die Blattfedern 5 bezüglich der Klemmleiste 3 ist dabei derartig unter Vorspannung gestellt, so daß zwischen der oberen Fläche der Leiste 3.2 und der gegenüberliegenden Fläche der Klemmleiste 4 die zum Halten einer Druckplatte nötige Kraft entsteht. Durch das Betätigungselement 8 kann die Klemmleiste 4 von der Klemmleiste 3 bzw. der Leiste 3.2 entgegen der Vorspannung der Blattfedern 5 abgehoben werden. Zwischen der Klemmleiste 4 und der oberen Fläche der Leiste 3.2 entsteht somit ein Spalt, so daß eine eingespannte Druckplatte herausgenommen bzw. eine neue Druckplatte eingeführt werden kann. Ein Rücksetzen des Betätigungselementes 8 bewirkt wieder ein Klemmen der Druckplatte. Durch das Betätigungselement 8 wird die über die vorgespannten Blattfedern 5 geführte obere Klemmleiste 4 überwiegend vertikal gerade geführt. Durch die zusätzliche Biegung der Blattfedern 5 entsteht dabei nur eine geringfügige Horizontalbewegung. Ferner kann auch vorgesehen sein, daß die Blattfedern 5 in einem Winkel zueinander verlaufen, um noch eine zusätzliche Schwenkbewegung der Klemmleiste 4 beim Öffnen zu erzielen.On the underside of the bar 4.2 connected to the terminal block 4 there is an actuating element 8 which is supported on the terminal block 3, which is shown in FIG. 2 as an eccentric shaft or as a shaft with a flattened portion. The storage of the terminal block 4 via the leaf springs 5 with respect to the terminal block 3 is here placed under tension so that between the upper surface of the bar 3.2 and the opposite surface of the terminal block 4, the force necessary to hold a pressure plate is generated. By means of the actuating element 8, the terminal strip 4 can be lifted off the terminal strip 3 or the strip 3.2 against the pretension of the leaf springs 5. A gap thus arises between the terminal strip 4 and the upper surface of the strip 3.2, so that a clamped pressure plate can be removed or a new pressure plate can be inserted. Resetting the actuating element 8 again causes the pressure plate to jam. The actuating element 8 guides the upper clamping strip 4, which is guided over the prestressed leaf springs 5, predominantly in a straight vertical manner. The additional bending of the leaf springs 5 results in only a slight horizontal movement. Furthermore, it can also be provided that the leaf springs 5 run at an angle to one another in order to achieve an additional pivoting movement of the terminal strip 4 when opening.

Fig. 3 und 4 zeigen eine weitere bevorzugte Ausführung der erfindungsgemäßen Befestigungsvorrichtung. Hier ist die obere Klemmleiste 4 ebenfalls über ein Paar von Blattfedern 5 bezüglich der unteren Klemmleiste 3 gelagert. Die Klemmleiste 3 ist hier im wesentlichen als U-Profil ausgebildet. Von je einem Schenkel der U-profilförmigen Klemmleiste 3 ist relativ zueinander höhenversetzt mittels Leisten 3.1, 3.2 sowie in Achsrichtung des Plattenzylinders 1 voneinander beabstandeten Befestigungsschrauben 7 ein Ende einer Blattfeder 5 eingespannt. In den U-förmigen Innenraum der Klemmleiste 3 sind die Enden der Blattfedern 5 über jeweils zwei Leisten 4.1, 4.2 und weitere Befestigungsschrauben 7 an der Unterseite der oberen Klemmleiste 4 angebracht. Gestrichelt sind in Fig. 3 und 4 ferner weitere Befestigungsschrauben 7 angedeutet, die in Achsrichtung des Plattenzylinders 1 axial bezüglich den von unten die Leisten 4.1 und 4.2 durchdringenden Befestigungsschrauben 7 versetzt liegen. Auf die Unterseite der Leiste 4.2 wirkt eine sich am Boden der Klemmleiste 3 abstützende Betätigungselement 8 ein, vermittels dem die obere Klemmleiste 4 sowie die Leisten 4.1, 4.2 entgegen der Vorspannung der Blattfedern 5 nach oben gedrückt werden kann. Die Blattfedern 5 ergeben hier eine Antiparallelschwinge mit der Klemmleiste 4 als Koppelelement.3 and 4 show a further preferred embodiment of the fastening device according to the invention. Here, the upper terminal block 4 is also supported by a pair of leaf springs 5 with respect to the lower terminal block 3. The terminal strip 3 is essentially designed as a U-profile. One end of a leaf spring 5 is clamped vertically offset from one leg of each U-shaped clamping strip 3 by means of strips 3.1, 3.2 and fastening screws 7 spaced apart in the axial direction of the plate cylinder 1. In the U-shaped interior of the terminal block 3, the ends of the leaf springs 5 are attached to the underside of the upper terminal block 4 via two strips 4.1, 4.2 and further fastening screws 7. 3 and 4 further dashed screws 7 are indicated by dashed lines, which are axially offset in the axial direction of the plate cylinder 1 with respect to the fastening screws 7 penetrating the strips 4.1 and 4.2 from below. An actuating element 8, which is supported on the bottom of the terminal block 3, acts on the underside of the bar 4.2, by means of the the upper terminal block 4 and the strips 4.1, 4.2 can be pressed upward against the bias of the leaf springs 5. The leaf springs 5 result in an anti-parallel rocker with the terminal block 4 as a coupling element.

Fig. 3 zeigt die erfindungsgemäße Befestigungseinrichtung für Druckplatten in der sogenannten Klemmstellung. Eine Druckplatte wird hier durch die Vorspannung der Blattfedern 5 zwischen der Unterseite der Klemmleiste 4 und der Oberseite der mit der Klemmleiste 3 verbundenen Leiste 3.1 geklemmt.Fig. 3 shows the fastening device according to the invention for printing plates in the so-called clamping position. A pressure plate is clamped here by the prestressing of the leaf springs 5 between the underside of the terminal strip 4 and the top of the strip 3.1 connected to the terminal strip 3.

Durch Verschwenken der hier symbolisch als Exzenterwelle bzw. als Welle mit einer Abflachung versehenen Welle des Betätigungselementes 8 wird die obere Klemmleiste 4 über die Leisten 4.1, 4.2 entgegen der Vorspannung der Blattfedern 5 bei einer gleichzeitigen leichten Verschwenkbewegung in Uhrzeigerrichtung nach oben gedrückt. Es entsteht somit ein relativ großer Spalt zum Einführen einer neuen Druckplatte zwischen der Unterseite der oberen Klemmleiste 4 und der entsprechend gegenüberliegenden Fläche der Leiste 3.1.By pivoting the shaft of the actuating element 8, which is symbolically provided here as an eccentric shaft or as a shaft with a flattened portion, the upper terminal strip 4 is pressed upwards over the strips 4.1, 4.2 against the bias of the leaf springs 5 with a simultaneous slight pivoting movement in the clockwise direction. There is thus a relatively large gap for inserting a new pressure plate between the underside of the upper terminal strip 4 and the correspondingly opposite surface of the strip 3.1.

Dementsprechend eignet sich die in den Fig. 3 und 4 gezeigte Befestigungsvorrichtung bevorzugt als eine Spanneinrichtung für das Druckende des Plattenzylinders 1. Dazu ist dann bevorzugt die untere Klemmleiste 3 parallel zum Boden der Grube 2 des Plattenzylinders 1 bewegbar gelagert (nicht gezeigte Führungsmittel). Rein symbolisch ist zwischen einer Wand der Grube 2 und der gegenüberliegenden Fläche der Klemmleiste 3 bzw. der Leiste 3.1 eine Spanneinrichtung 9 angeordnet, vermittels der die Klemmleiste 3 in Richtung der Mitte der Grube 2 bewegbar ist. Dadurch wird eine geklemmte Druckplatte um den Außenumfang des Plattenzylinders 1 gespannt.Accordingly, the fastening device shown in FIGS. 3 and 4 is preferably suitable as a tensioning device for the printing end of the plate cylinder 1. For this purpose, the lower clamping bar 3 is preferably movably mounted parallel to the bottom of the pit 2 of the plate cylinder 1 (guide means not shown). Symbolically, a clamping device 9 is arranged between a wall of the pit 2 and the opposite surface of the terminal strip 3 or the bar 3.1, by means of which the terminal strip 3 can be moved in the direction of the center of the pit 2. As a result, a clamped pressure plate is stretched around the outer circumference of the plate cylinder 1.

Die voranstehend anhand der Fig. 1 bis 4 gezeigten Ausführungsvarianten der erfindungsgemäßen Befestigungsvorrichtung sind hinsichtlich ihrer Ausmaße und Dimensionierung rein symbolisch zu verstehen. Es wurde aber bereits dargelegt, daß die vorzusehende Haltekraft die Druckplatte zwischen den Klemmleisten 3 und 4 durch eine entsprechende Vorspannung der erfindungsgemäß vorzusehenden Blattfedern 5 einzustellen ist. Die Blattfedern 5 können dazu vorzugsweise aus Federstahl mit einer vorgegebenen Profilierung bzw. Krümmung gefertigt sein. Auch können mehrere Blattfedern 5 unter einen Winkel zueinander verlaufend angeordnet sein.The design variants of the fastening device according to the invention shown above with reference to FIGS. 1 to 4 are to be understood purely symbolically in terms of their dimensions and dimensions. It However, it has already been shown that the holding force to be provided is to set the pressure plate between the terminal strips 3 and 4 by a corresponding preloading of the leaf springs 5 to be provided according to the invention. For this purpose, the leaf springs 5 can preferably be made of spring steel with a predetermined profile or curvature. A plurality of leaf springs 5 can also be arranged at an angle to one another.

Des weiteren wurde voranstehend bereits mehrfach dargelegt, daß die erfindungsgemäße Befestigungsvorrichtung für Druckplatten, bestehend aus den Klemmleisten 3 und 4 sowie deren Verbindung über die Blattfedern 5, über die Formatbreite des Plattenzylinders 1 einteilig aber auch mehrteilig unterteilt ausgebildet sein kann.Furthermore, it has already been stated several times above that the fastening device according to the invention for printing plates, consisting of the terminal strips 3 and 4 and their connection via the leaf springs 5, can be formed in one part but also in several parts over the format width of the plate cylinder 1.

BezugszeichenlisteReference list

11
PlattenzylinderPlate cylinder
22nd
Grubepit
33rd
Klemmleiste (unten)Terminal strip (below)
3.13.1
Leistestrip
3.23.2
Leistestrip
44th
Klemmleiste (oben)Terminal strip (top)
4.14.1
Leistestrip
4.24.2
Leistestrip
55
BlattfederLeaf spring
66
Leistestrip
77
BefestigungsschraubeFastening screw
88th
BetätigungselementActuator
99
SpanneinrichtungClamping device

Claims (10)

  1. Device for fixing printing plates on the plate cylinders of printing presses, particularly offset sheet printing presses, consisting of a pair of clamping rails arranged parallel to one another and extending in the axial direction of the plate cylinder, spring means coordinated to the clamping rails by which the clamping rails can be pressed together to hold a printing plate and an actuation device working counter to the force of the spring means for changing a printing plate, characterised in that the clamping rails (3, 4) are connected with one another by means of at least one leaf spring (5) set under pretensioning.
  2. Device according to Claim 1, characterised in that a clamping rail (4) is constructed as the swivellable end of a leaf spring (5) fixed to the other clamping rail (3).
  3. Device according to Claim 1, characterised in that a clamping rail (4) is connected as a couple via at least two leaf springs (5) in the fashion of a four-part couple with the other clamping rail (3) as frame.
  4. Device according to Claim 3, characterised in that a clamping rail (4) is pivoted via at least two leaf springs (5) arranged spaced from one another in the fashion of a parallel swinger on the further clamping rail (3).
  5. Device according to Claim 3, characterised in that the one clamping rail (4) is pivoted via at least two leaf springs (5) in the fashion of an anti-parallel swinger with respect to the further clamping rail (3).
  6. Device according to one of Claims 1 to 5, characterised in that at least one of the clamping rails (3, 4) is constructed divided across the format width in the axial direction of the plate cylinder (1).
  7. Device according to one of Claims 1 to 6, characterised in that one or more of the leaf springs (5) provided is constructed divided across the format width in the axial direction of the plate cylinder (1).
  8. Device according to one of Claims 1 to 7, characterised in that in the channel (2) of the plate cylinder (1), a lower clamping rail (3) is installed fixed with respect to the cylinder.
  9. Device according to one of Claims 1 to 8, characterised in that the lower clamping rail (3) in the channel (2) of the plate cylinder (1) is arranged shiftably substantially in the peripheral direction of the plate cylinder (1) for register correction.
  10. Device according to one of Claims 1 to 9, characterised in that the lower clamping rail (3) arranged in a channel (2) of the plate cylinder (1) has arranged relative thereto a tensioning device (9) for moving the lower clamping rail (3) substantially in the peripheral direction of the plate cylinder (1).
EP95103229A 1994-03-25 1995-03-07 Device for mounting a printing plate Expired - Lifetime EP0683047B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4410385 1994-03-25
DE4410385A DE4410385C2 (en) 1994-03-25 1994-03-25 Device for fastening printing plates

Publications (2)

Publication Number Publication Date
EP0683047A1 EP0683047A1 (en) 1995-11-22
EP0683047B1 true EP0683047B1 (en) 1997-07-23

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Application Number Title Priority Date Filing Date
EP95103229A Expired - Lifetime EP0683047B1 (en) 1994-03-25 1995-03-07 Device for mounting a printing plate

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AT (1) ATE155740T1 (en)
DE (2) DE4410385C2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10024087C2 (en) * 2000-05-18 2002-05-08 Torald Rohloff Device for mounting a printing plate on a cylinder of a rotary printing press
DE102009027508A1 (en) * 2009-07-07 2011-01-20 Manroland Ag Grip arm for sheet-handling machine, has longitudinal strut lying against gripper segment, where relative movement between longitudinal strut and cross member takes place by force acting on longitudinal strut
DE102012207106B4 (en) * 2012-04-27 2015-04-02 Koenig & Bauer Aktiengesellschaft plate cylinder

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2378478A (en) * 1943-02-18 1945-06-19 Goss Printing Press Co Ltd Printing press gripper mechanism
DE1761308A1 (en) * 1968-05-02 1971-05-13 Polygraph Leipzig Method and device for clamping sheets of material
DD237815A1 (en) * 1985-05-31 1986-07-30 Polygraph Leipzig DEVICE FOR FIXING A BENDING PRESSURE PLATE
DE3702032A1 (en) * 1987-01-24 1988-08-04 Basf Ag DEVICE FOR TENSIONING PRINTING PLATES
DD261770A1 (en) * 1987-07-02 1988-11-09 Polygraph Leipzig DEVICE FOR FIXING A BENDING PRESSURE PLATE
DD261769A1 (en) * 1987-07-02 1988-11-09 Polygraph Leipzig DEVICE FOR FIXING A BENDING PRESSURE PLATE
DE3806526A1 (en) * 1988-03-01 1989-09-14 Heidelberger Druckmasch Ag DEVICE FOR TENSIONING FLEXIBLE PRINTING PLATES ON THE PLATE CYLINDER OF ROTARY PRINTING MACHINES
DE3900818C1 (en) * 1989-01-13 1990-05-10 Heidelberger Druckmaschinen Ag, 6900 Heidelberg, De
JPH0649369B2 (en) * 1989-05-29 1994-06-29 アキヤマ印刷機製造株式会社 Plate clamping device for sheet-fed printing press
DE4129831C3 (en) * 1990-12-21 1998-08-13 Heidelberger Druckmasch Ag Quick clamp device
DE4315906A1 (en) * 1993-05-12 1994-11-17 Philips Patentverwaltung Power supply circuit

Also Published As

Publication number Publication date
EP0683047A1 (en) 1995-11-22
DE4410385A1 (en) 1995-09-28
DE4410385C2 (en) 1997-07-17
DE59500409D1 (en) 1997-08-28
ATE155740T1 (en) 1997-08-15

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