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EP0713770A1 - Device for mounting a flexible printing plate - Google Patents

Device for mounting a flexible printing plate Download PDF

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Publication number
EP0713770A1
EP0713770A1 EP95115212A EP95115212A EP0713770A1 EP 0713770 A1 EP0713770 A1 EP 0713770A1 EP 95115212 A EP95115212 A EP 95115212A EP 95115212 A EP95115212 A EP 95115212A EP 0713770 A1 EP0713770 A1 EP 0713770A1
Authority
EP
European Patent Office
Prior art keywords
tensioning
leaf
tubular support
printing form
shaped
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
EP95115212A
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German (de)
French (fr)
Other versions
EP0713770B1 (en
Inventor
Jacques Métrope
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 EP0713770A1 publication Critical patent/EP0713770A1/en
Application granted granted Critical
Publication of EP0713770B1 publication Critical patent/EP0713770B1/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
    • B41F27/1243Devices 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 fastening a flexible printing form on the printing form cylinder of a printing press with at least one slot running in the axial direction, in which at least one sheet-shaped element, which ends with a curve and fixes a fold of a flexible printing form, is stored.
  • a fastening device for a flexible pressure plate is already known from document EP-A-0585625. Both ends of this pressure plate are fixed between a side wall of a slot and an elongated leg of a leaf spring.
  • the leaf spring is held in the slot of the pressure cylinder by a U-shaped design and has a pit-shaped depression in the upper region of the elongated leg.
  • a relief on the fold of the plate penetrates into the depression located below the rounding of the elongated leg. In addition to a frictional fixation of the pressure plate, this results in a positive connection of a pressure plate bend to the leaf spring arrangement.
  • each leaf-shaped element is a tensioning element which is received in a tubular support receiving an actuating element deforming each tensioning element.
  • the actuating member deforming the tensioning elements can be designed as a diaphragm body that can be pressurized with pressure medium.
  • the actuating member is a mechanical actuating means, such as an actuating shaft with a flat surface.
  • the tubular support which receives it is in one Axial bore of the printing form cylinder is rotatably arranged.
  • the tubular support also includes a number of pairs of recesses corresponding to the number of clamping elements to be accommodated, which extend in the axial direction parallel to the axis of rotation of the printing form cylinder.
  • the recesses are arranged opposite one another in the tubular carrier.
  • Each leaf-shaped tensioning element has an abutment which engages in the tensioning channel extension. In the "tensioning" state, each leaf-shaped tensioning element lies both on a boundary of the tensioning channel extension and on a boundary of the upper recess assigned to the tensioning channel.
  • the pair of recesses align with both the tensioning channel and the tensioning channel extension so that each sheet-like tensioning element can be removed in the direction of removal.
  • both individual clamping elements that can be brought next to one another in the axial direction and a single radially extending clamping element provided with axial cutouts are conceivable.
  • FIG. 1 is a schematic perspective view of a printing form cylinder in the "clamp" state.
  • Figure 2 is a schematic cross section of the tubular support in the "clamp" state.
  • FIG. 3 is a schematic perspective view of a printing form cylinder in the “printing form release” state.
  • FIG. 4 is a schematic cross section of the tubular support with the membrane acted upon in the “printing form release” state.
  • FIG. 5 is a schematic cross section of the tubular support in the axial bore in the printing form cylinder with the rear printing form edge released and the tensioned leading edge.
  • FIG. 6 is a schematic cross section of a tubular support rotated in the removal position, so that each sheet-like clamping element can be removed radially.
  • FIGS 7, 8 and 9 represent different ones Embodiments of tensioning elements, which have different elastic properties.
  • FIG. 1 shows a printing form cylinder 1, on the peripheral surface of which a printing form 4 rests, the front and rear edges 5, 6 of which are received by a clamping channel 7.
  • the printing form cylinder 1 rotates about an axis of rotation 2 in the direction of the arrow 3.
  • the printing form cylinder 1 has an axial bore in which a tubular support is mounted, which extends along an axis 8 across the width of the cylinder.
  • recesses 12 opposite one another are embodied in the circumferential surface of the tubular support 11, into which leaf-shaped tensioning elements 13 such as leaf springs engage.
  • the sheet-like tensioning elements 13 have at their lower end a barb 15 formed by bending the lower edge and at their upper end a hook 14 tensioning the printing form.
  • the section lying between the hook 14 and the barb 15 of each leaf-shaped tensioning element is located opposite an actuating member 17.
  • This can be implemented, for example, as a pressurizable membrane 17 or as a mechanical means such as a rotatable actuating shaft flattened on one side. This actuator is advantageously remotely controllable.
  • the front edge 5 of the printing form 4 in the clamping channel 7 is against one of its The angled rear edge 6 of the printing form 4 is gripped by the hook 14 of the sheet-like clamping element.
  • the tensioning channel 7 has a tensioning channel extension 16.
  • the recesses 12 of the tubular support 11 lie opposite one another and are penetrated by each leaf-shaped clamping element 13.
  • the leaf-shaped clamping element 13 is fixed with its lower barb 15 in the clamping channel extension 16 and acts above its curvature on the edge of the upper recess 12 in the tubular support 11.
  • the actuating member used here is relieved of pressure, so that the clamping force is applied by the inherent rigidity of the leaf-shaped clamping element 13 and is maintained.
  • FIG. 3 It can be seen in FIG. 3 that the rear edge 6, freed from the sheet-like tensioning element 13, lies above the surface of the cylinder 1. As FIG. 3 clearly shows, the curvature of the main part of the leaf-shaped tensioning elements 13 is completely eliminated by acting on the actuating member 17 used here. As can be seen in particular from FIG. 4, in this state of release of the printing form trailing edge 6, the actuating member 17 used here is pressurized. Compressed air can be used as the pressure medium 22.
  • the Actuator 17 brings about an elongated position of the leaf-shaped tensioning element 13, although this remains fixed in the tensioning channel extension 13, but moves in the upper of the recesses 12 until it bears against the side wall 9 of the tensioning channel 7.
  • FIG. 5 shows the rear end 6 of the printing form 4 protruding from the surface of the printing form cylinder 1.
  • the deformable membrane-shaped actuating element 17 shown here is relieved of pressure.
  • the hook 14 of the clamping element 13 clamps the front edge 5 of the printing form 4 against the side wall 9 of the clamping channel 7 because of the inherent rigidity of the sheet-shaped clamping element 13.
  • the printing form 4 can be slowly removed from the surface of the printing form cylinder 1 and be inserted into an automatic or semi-automatic plate changing device.
  • the front edge 5 of the printing form 4 remains permanently clamped, since the sheet-like clamping element 13 is not subjected to any deformation and remains fixed in the clamping channel extension 17 by its barb 15.
  • FIGS 7, 8 and 9 represent different possible design standards for tensioning elements.
  • continuous sheet-shaped clamping elements 20 or 21 can also be provided. These are provided both with a hook-shaped end 14 for fixing the rear edge 6 of a printing form 4 and with a barb 15. They can be provided with as well as without cut-outs in the axial direction, depending on the required spring or clamping characteristics. It is obvious that the choice of material can also influence the spring characteristics.
  • the level of the forces to be exerted by the actuator 17 depends in each case on the clamping elements used.
  • a pivotable actuating shaft with a flattening on one side in order to cause the deformation of the tensioning elements 13, 20 and 21.
  • each clamping element is elastically deformed by the actuating member with the aim of holding the flexible printing form on the printing form cylinder during normal operation of the machine and that both the clamping and the unclamping of the flexible printing form is achieved by the release of each clamping element, whereby it finds its original shape and inherent rigidity.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

The fixing device fixes a flexible printing forme (4) on the printing forme cylinder (1) of a printing press with at least one slit running axially. There is at least one leaf-shaped tension element in the slit, with a rounded end and edging to lock the flexible printing forme. Each tension element fits in a tubular carrier (11) with an actuator to deform each tension element. Each deforming actuator may be consist of a membrane body which can be acted on by a pressure medium, or its action may be mechanical. It may consist of a flanging round a turning setting shaft.

Description

Die Erfindung bezieht sich auf eine Vorrichtung zum Befestigen einer biegsamen Druckform auf dem Druckformzylinder einer Druckmaschine mit mindestens einem in Achsrichtung verlaufenden Schlitz, in dem mindestens ein blattförmiges Element,welches mit einer Rundung abschließt und eine Abkantung einer biegsamen Druckform fixiert, gelagert ist.The invention relates to a device for fastening a flexible printing form on the printing form cylinder of a printing press with at least one slot running in the axial direction, in which at least one sheet-shaped element, which ends with a curve and fixes a fold of a flexible printing form, is stored.

Aus dem Dokument EP-A-0585625 ist schon eine Befestigungsvorrichtung einer biegsamen Druckplatte bekannt. Beide Enden dieser Druckplatte werden zwischen einer Seitenwand eines Schlitzes und einem verlängerten Schenkel einer Blattfeder fixiert. Die Blattfeder wird durch eine U-förmige Formgebung im Schlitz des Druckzylinders gehalten und weist im oberen Bereich des verlängerten Schenkels eine grubenförmige Vertiefung auf. Beim Einführen der Druckplattenabkantung dringt ein Relief auf der Abkantung der Platte in die unterhalb der Abrundung des verlängerten Schenkels gelegene Vertiefung ein. Außer einer reibschlüssigen Fixierung der Druckplatte folgt daraus also eine formschlüssige Verbindung einer Druckplattenabkantung mit der Blattfederanordnung.A fastening device for a flexible pressure plate is already known from document EP-A-0585625. Both ends of this pressure plate are fixed between a side wall of a slot and an elongated leg of a leaf spring. The leaf spring is held in the slot of the pressure cylinder by a U-shaped design and has a pit-shaped depression in the upper region of the elongated leg. When inserting the pressure plate fold, a relief on the fold of the plate penetrates into the depression located below the rounding of the elongated leg. In addition to a frictional fixation of the pressure plate, this results in a positive connection of a pressure plate bend to the leaf spring arrangement.

Ausgehend vom obigen Stand der Technik ist es die Aufgabe der Erfindung, auswechselbare Spannelemente zur Befestigung einer Druckform mit hoher Zuverläßigkeit fernsteuerbar zu betätigen.Based on the above prior art, it is the Object of the invention to operate interchangeable clamping elements for attaching a printing form with high reliability with remote control.

Dieses Ziel wird mit einer erfindungsgemäßen Vorrichtung dadurch erreicht, daß jedes blattförmige Element ein Spannelement ist, welches in einem ein jedes Spannelement verformenden Betätigungsorgan aufnehmenden röhrenförmigen Träger aufgenommen ist.This aim is achieved with a device according to the invention in that each leaf-shaped element is a tensioning element which is received in a tubular support receiving an actuating element deforming each tensioning element.

Mit Hilfe dieser vorgeschlagenen Lösung ist es möglich, die eine Druckform fixierenden Spannelemente zu verformen, wobei die Fixierung der Druckform während des normalen Maschinenbetriebes durch die Eigensteifigkeit jedes elastisch verformbaren Spannelementes sichergestellt ist. Sowohl das Auf-als auch das Ausspannen einer biegsamen Druckform auf dem Druckformzylinder erfolgt durch elastische Verformung jedes Spannelementes mit Hilfe eines fernsteuerbaren Betätigungsorgans.Jedes Spannelement, das den röhrenförmigen Träger durchdringt, kann nach einer einfachen Entsicherungsbewegung aus diesem radial entnommen und auf einfache Weise durch ein anderes Spannelement ersetzt werden.With the help of this proposed solution, it is possible to deform the clamping elements which fix a printing form, the fixing of the printing form being ensured during normal machine operation by the inherent rigidity of each elastically deformable clamping element. Both a flexible printing form is clamped and unclamped on the printing form cylinder by means of elastic deformation of each clamping element with the aid of a remote-controllable actuating element. Each clamping element that penetrates the tubular carrier can be removed radially from it after a simple unlocking movement and in a simple manner by a another clamping element to be replaced.

Nach einer erfindungsgemäßen Ausführungsvariante der Vorrichtung kann das die Spannelemente verformende Betätigungsorgan als druckmittelbeaufschlagbarer Membrankörper ausgeführt werden. Nach einer anderen Ausführungsvariante ist das Betätigungsorgan ein mechanisches Stellmittel wie zum Beispiel eine Stellwelle mit einer Abflachung am Umfang. Um die Austauschbarkeit jedes Spannelementes zu erleichtern, ist der diese aufnehmende röhrenförmige Träger in einer Axialbohrung des Druckformzylinders verdrehbar angeordnet. Der röhrenförmige Träger umfaßt außerdem eine der Anzahl der aufzunehmenden Spannelemente entsprechende Anzahl von Paaren von Ausnehmungen, die sich in axialer Richtung parallel zur Rotationsachse des Druckformzylinders erstrecken. Die Ausnehmungen sind einander gegenüberliegend in dem röhrenförmigen Träger angeordnet.According to an embodiment variant of the device according to the invention, the actuating member deforming the tensioning elements can be designed as a diaphragm body that can be pressurized with pressure medium. According to another embodiment variant, the actuating member is a mechanical actuating means, such as an actuating shaft with a flat surface. In order to facilitate the interchangeability of each tensioning element, the tubular support which receives it is in one Axial bore of the printing form cylinder is rotatably arranged. The tubular support also includes a number of pairs of recesses corresponding to the number of clamping elements to be accommodated, which extend in the axial direction parallel to the axis of rotation of the printing form cylinder. The recesses are arranged opposite one another in the tubular carrier.

Der durch den Schlitz des Druckformzylinders definierte Spannkanal, in welchen die Abkantungen der Druckform hineinragen, ist durch die Seitenwände des Schlitzes begrenzt und mündet in die den röhrenförmigen Träger aufnehmende Axialbohrung des Druckformzylinders. Dem Spannkanal gegenüberliegend befindet sich ein mit diesem fluchtender Spannkanalfortsatz. Jedes blattförmige Spannelement weist ein Widerlager auf, welches in den Spannkanalfortsatz eingreift. Im Zustand "Spannen" liegt jedes blattförmige Spannelement sowohl an einer Begrenzung des Spannkanalfortsatzes wie auch an einer Begrenzung der oberen, dem Spannkanal zugeordneten Ausnehmung.The clamping channel defined by the slot of the printing form cylinder, into which the folds of the printing form protrude, is delimited by the side walls of the slot and opens into the axial bore of the printing form cylinder which receives the tubular support. Opposite the tension channel is an extension of the tension channel aligned with this. Each leaf-shaped tensioning element has an abutment which engages in the tensioning channel extension. In the "tensioning" state, each leaf-shaped tensioning element lies both on a boundary of the tensioning channel extension and on a boundary of the upper recess assigned to the tensioning channel.

Bei Verdrehung des röhrenförmigen Trägers entgegen dem Uhrzeigersinn fluchtet das Paar Ausnehmungen sowohl mit dem Spannkanal als auch mit dem Spannkanalfortsatz so daß jedes blattförmige Spannelement in Aushängerichtung entfernbar ist.When the tubular support is rotated counterclockwise, the pair of recesses align with both the tensioning channel and the tensioning channel extension so that each sheet-like tensioning element can be removed in the direction of removal.

Schließlich sind nach erfindungsgemäßen Ausführungsvarianten der Vorrichtung sowohl einzelne Spannelemente denkbar, die nebeneinander in axiale Richtung gebracht werden können als auch ein einzelnes sich radial erstreckendes mit axialen Ausbrüchen versehenes Spannelement. Andererseits ist es möglich, auch ein Spannelement vorzusehen, welches sich in axialer Richtung erstreckt, das diese Durchbrüche nicht aufweist.Finally, according to embodiments of the device according to the invention, both individual clamping elements that can be brought next to one another in the axial direction and a single radially extending clamping element provided with axial cutouts are conceivable. On the other hand, it is possible also to provide a clamping element which extends in the axial direction, which does not have these openings.

Verschiedene andere Kennzeichen und Vorteile der Erfindung ergeben sich aus der folgenden ausführlichen Beschreibung. Ausführungsformen der Erfindung werden als nicht begrenzende Beispiele in den im Anhang befindlichen Zeichnungen dargestellt.Various other features and advantages of the invention will be apparent from the detailed description that follows. Embodiments of the invention are illustrated as non-limiting examples in the accompanying drawings.

Die Figur 1 ist eine schematische perspektivische Ansicht eines Druckformzylinders im Zustand "Klemmen ".FIG. 1 is a schematic perspective view of a printing form cylinder in the "clamp" state.

Die Figur 2 ist ein schematischer Querschnitt des röhrenförmige Träger im Zustand "Klemmen".Figure 2 is a schematic cross section of the tubular support in the "clamp" state.

Die Figur 3 ist eine schematische perspektivische Ansicht eines Druckformzylinders im Zustand "Druckformfreigabe".FIG. 3 is a schematic perspective view of a printing form cylinder in the “printing form release” state.

Die Figur 4 ist ein schematischer Querschnitt des röhrenförmigen Trägers mit beaufschlagter Membran im Zustand "Druckformfreigabe".FIG. 4 is a schematic cross section of the tubular support with the membrane acted upon in the “printing form release” state.

Die Figur 5 ist ein schematischer Querschnitt des röhrenförmigen Trägers in der Axialbohrung im Druckformzylinder mit freigegebener hinterer Druckformkante und gespannter Vorderkante.FIG. 5 is a schematic cross section of the tubular support in the axial bore in the printing form cylinder with the rear printing form edge released and the tensioned leading edge.

Die Figur 6 ist ein schematischer Querschnitt von einem in Entnahmeposition verdrehten röhrenförmigen Träger, so daß jedes blattförmige Spannelement radial entnehmbar ist.FIG. 6 is a schematic cross section of a tubular support rotated in the removal position, so that each sheet-like clamping element can be removed radially.

Die Figuren 7,8 und 9 stellen verschiedene Ausführungsformen von Spannelementen dar, welche unterschiedliche elastische Eigenschaften aufweisen.Figures 7, 8 and 9 represent different ones Embodiments of tensioning elements, which have different elastic properties.

Die Figur 1 stellt einen Druckformzylinder 1 dar, auf dessen Umfangsfläche eine Druckform 4 aufliegt, dessen Vorder- und Hinterkante 5,6 von einem Spannkanal 7 aufgenommen werden. Der Druckformzylinder 1 rotiert um eine Rotationsachse 2 in Richtung des Pfeiles 3. Der Druckformzylinder 1 weist eine axiale Bohrung auf, in der ein röhrenförmiger Träger lagert, der sich entlang einer Achse 8 über die Breite des Zylinders erstreckt. Der Spannkanal 7, welcher von den hier parallelen Wänden 9,10 begrenzt wird, führt in die axiale Bohrung, die den röhrenförmigen Träger 11 aufnimmt. In der dargestellten Ansicht erkennt man, daß in der Umfangsfläche des röhrenförmigen Trägers 11 hier einander gegenüberliegende Ausnehmungen 12 ausgeführt sind, in die blattförmige Spannelemente 13 wie zum Beispiel Blattfedern eingreifen. Die blattförmigen Spannelemente 13 weisen an ihrem unteren Ende einen durch Umbiegen der unteren Kante gebildeten Widerhaken 15 und an ihrem oberen Ende einen die Druckform spannenden Haken 14 auf. Der zwischen dem Haken 14 und dem Widerhaken 15 jedes blattförmigen Spannelementes liegende Abschnitt befindet sich gegenüber einem Betätigungsorgan 17. Dieses kann zum Beispiel als eine druckbeaufschlagbare Membran 17 oder als ein mechanisches Mittel wie zum Beispiel eine verdrehbare einseitig abgeflachte Stellwelle ausgeführt werden. Dieses Betätigungsorgan ist vorteilhafterweise fernsteuerbar.FIG. 1 shows a printing form cylinder 1, on the peripheral surface of which a printing form 4 rests, the front and rear edges 5, 6 of which are received by a clamping channel 7. The printing form cylinder 1 rotates about an axis of rotation 2 in the direction of the arrow 3. The printing form cylinder 1 has an axial bore in which a tubular support is mounted, which extends along an axis 8 across the width of the cylinder. The clamping channel 7, which is delimited by the walls 9, 10 parallel here, leads into the axial bore which receives the tubular support 11. In the view shown it can be seen that recesses 12 opposite one another are embodied in the circumferential surface of the tubular support 11, into which leaf-shaped tensioning elements 13 such as leaf springs engage. The sheet-like tensioning elements 13 have at their lower end a barb 15 formed by bending the lower edge and at their upper end a hook 14 tensioning the printing form. The section lying between the hook 14 and the barb 15 of each leaf-shaped tensioning element is located opposite an actuating member 17. This can be implemented, for example, as a pressurizable membrane 17 or as a mechanical means such as a rotatable actuating shaft flattened on one side. This actuator is advantageously remotely controllable.

Unter Bezugnahme auf die Figur 2 ist die Vorderkante 5 der Druckform 4 in dem Spannkanal 7 gegen eine seiner Seitenwände 9 eingehangen.Die abgewinkelte Hinterkante 6 der Druckform 4 wird von dem Haken 14 des blattförmigen Spannelementes ergriffen.With reference to FIG. 2, the front edge 5 of the printing form 4 in the clamping channel 7 is against one of its The angled rear edge 6 of the printing form 4 is gripped by the hook 14 of the sheet-like clamping element.

Im dargestellten Zustand "Klemmen" ist das Betätigungsorgan, hier eine Membran 17, entlastet ; die Eigensteifigkeit des blattförmigen Spannelementes 13 zieht die Hinterkante 6 der biegsamen Druckform 4 in Richtung auf das Innere des Spannkanals 7 derart, daß der Druck, unter dem die zu befestigende Druckform 4 steht, in tangentialer Richtung zur Zylinderoberfläche 1 erhalten bleibt. Der Spannkanal 7 weist einen Spannkanalfortsatz 16 auf. Die Ausnehmungen 12 des röhrenförmigen Trägers 11 liegen einander gegenüber und werden von jedem blattförmigen Spannelement 13 durchdrungen. Das blattförmige Spannelement 13 ist mit seinem unteren Widerhaken 15 im Spannkanalfortsatz 16 festgelegt und beaufschlagt oberhalb seiner Wölbung den Rand der oberen Ausnehmung 12 im röhrenförmigen Träger 11. Das hier benutzte Betätigungsorgan ist druckentlastet, so daß die Spannkraft durch die Eigensteifigkeit des blattförmigen Spannelementes 13 aufgebracht und aufrecht erhalten bleibt.In the state shown "clamping" the actuator, here a membrane 17, is relieved; the inherent rigidity of the sheet-like clamping element 13 pulls the rear edge 6 of the flexible printing form 4 in the direction of the interior of the clamping channel 7 such that the pressure under which the printing form 4 to be fastened is maintained is maintained in the tangential direction to the cylinder surface 1. The tensioning channel 7 has a tensioning channel extension 16. The recesses 12 of the tubular support 11 lie opposite one another and are penetrated by each leaf-shaped clamping element 13. The leaf-shaped clamping element 13 is fixed with its lower barb 15 in the clamping channel extension 16 and acts above its curvature on the edge of the upper recess 12 in the tubular support 11. The actuating member used here is relieved of pressure, so that the clamping force is applied by the inherent rigidity of the leaf-shaped clamping element 13 and is maintained.

Auf der Figur 3 ist erkennbar, daß die hintere von dem blattförmigen Spannelement 13 befreite Kante 6 oberhalb der Oberfläche des Zylinders 1 liegt. Wie die Figur 3 deutlich zeigt, wird die Wölbung des Hauptteils der blattförmigen Spannelemente 13 durch die Beaufschlagung des hier verwendeten Betätigungsorgans 17 völlig eliminiert. Wie insbesondere aus Figur 4 entnehmbar ist, ist in diesem Zustand der Freigabe der Druckformhinterkante 6 das hier verwendete Betätigungsorgan 17 mit Druck beaufschlagt. Als Druckmedium 22 kann Pressluft Verwendung finden. Das Betätigungsorgan 17 führt eine gestreckte Lage des blattförmigen Spannelementes 13 herbei, wobei dieses zwar im Spannkanalfortsatz 13 festgelegt bleibt, jedoch in der oberen der Ausnehmungen 12 wandert, bis es sich an die Seitenwand 9 des Spannkanals 7 anlegt. Durch diese dem blattförmigen Spannelement 13 aufgezwungene Bewegung wandert der Haken 14 nach hinten bezogen auf die Hinterkante 6 der Druckform 4 wodurch diese freigegeben wird. Die Hinterkante schnellt dadurch über die Position 6' in die von der Oberfläche des Druckformzylinders 1 abstehende Position wie in Figur 4 gezeigt.It can be seen in FIG. 3 that the rear edge 6, freed from the sheet-like tensioning element 13, lies above the surface of the cylinder 1. As FIG. 3 clearly shows, the curvature of the main part of the leaf-shaped tensioning elements 13 is completely eliminated by acting on the actuating member 17 used here. As can be seen in particular from FIG. 4, in this state of release of the printing form trailing edge 6, the actuating member 17 used here is pressurized. Compressed air can be used as the pressure medium 22. The Actuator 17 brings about an elongated position of the leaf-shaped tensioning element 13, although this remains fixed in the tensioning channel extension 13, but moves in the upper of the recesses 12 until it bears against the side wall 9 of the tensioning channel 7. As a result of this movement, which is imposed on the sheet-like tensioning element 13, the hook 14 moves rearward relative to the rear edge 6 of the printing form 4, as a result of which this is released. As a result, the rear edge snaps over the position 6 'into the position protruding from the surface of the printing form cylinder 1, as shown in FIG.

Figur 5 zeigt das von der Oberfläche des Druckformzylinders 1 abstehende hintere Ende 6 der Druckform 4. In diesem Zustand ist das hier dargestellte verformbare membranförmige Betätigungsorgan 17 druckentlastet. Dadurch klemmt der Haken 14 des Spannelementes 13 wegen der Eigensteifigkeit des blattförmigen Spannelementes 13 die Vorderkante 5 der Druckform 4 gegen die Seitenwand 9 des Spannkanals 7. Bei langsamer Umdrehung des Druckformzylinders 1 im Uhrzeigersinn kann die Druckform 4 langsam von der Oberfläche des Druckformzylinders 1 entfernt und in eine automatische oder halbautomatische Plattenwechselvorrichtung eingeführt werden. Während dieses Vorganges bleibt die Vorderkante 5 der Druckform 4 dauerhaft geklemmt, da das blattförmige Spannelement 13 keiner Verformung ausgesetzt ist und durch seinen Widerhaken 15 im Spannkanalfortsatz 17 festgelegt bleibt.FIG. 5 shows the rear end 6 of the printing form 4 protruding from the surface of the printing form cylinder 1. In this state, the deformable membrane-shaped actuating element 17 shown here is relieved of pressure. As a result, the hook 14 of the clamping element 13 clamps the front edge 5 of the printing form 4 against the side wall 9 of the clamping channel 7 because of the inherent rigidity of the sheet-shaped clamping element 13. With a slow rotation of the printing form cylinder 1 clockwise, the printing form 4 can be slowly removed from the surface of the printing form cylinder 1 and be inserted into an automatic or semi-automatic plate changing device. During this process, the front edge 5 of the printing form 4 remains permanently clamped, since the sheet-like clamping element 13 is not subjected to any deformation and remains fixed in the clamping channel extension 17 by its barb 15.

Im auf der Figur 6 dargestellten Zustand ist der röhrenförmige Träger 11 in Richtung des Pfeiles 19 verdreht. Der Spannkanalfortsatz 16 befindet sich jetzt gegenüber der unteren Ausnehmung 12 so daß sich der Widerhaken 15 des blattförmigen Spannelementes 13 durch diese führen läßt. Das blattförmige Spannelement 13 ist somit bei Druckentlastung des Betätigungsorganes 17 in Aushängerichtung 18 in Position 13' bewegbar und läßt sich danach einfach aus dem Spannkanal 7 entfernen. Man könnte zum Beispiel auch ein Spannelement mit einer anderen Federcharakteristik in den röhrenförmigen Träger 11 einführen bevor dieser entgegen der Richtung des Pfeiles 19 in seine ursprüngliche Betriebsposition zurückkehrt.In the state shown in FIG. 6, the tubular support 11 is rotated in the direction of the arrow 19. The tension channel extension 16 is now opposite the lower recess 12 so that the barb 15 of the leaf-shaped clamping element 13 can be guided through it. The sheet-like tensioning element 13 can thus be moved in position 13 'when the actuating member 17 is relieved of pressure and can then be easily removed from the tensioning channel 7. One could, for example, also insert a tensioning element with a different spring characteristic into the tubular support 11 before it returns to its original operating position against the direction of the arrow 19.

Die Figuren 7,8 und 9 stellen verschiedene mögliche Ausführungsnormen von Spannelementen dar.Figures 7, 8 and 9 represent different possible design standards for tensioning elements.

Neben den schon beschriebenen Spannelemente 13 welche nebeneinander in axialer Richtung in eine ihrer Anzahl entsprechende Anzahl von Ausnehmungen 12 eingeführt werden, kann man ebenfalls durchgängige blattförmige Spannelemente 20 bzw 21 vorsehen. Diese sind sowohl mit einem hakenförmigen Ende 14 zur Fixierung der Hinterkante 6 einer Druckform 4 als auch mit einem Widerhaken 15 versehen. Sie können sowohl mit als auch ohne Ausbrüche in axialer Richtung versehen sein, je nach erforderlichen Feder- bzw. Klemmcharakteristiken. Es liegt auf der Hand, daß durch die Materialwahl ebenfalls Einfluß auf die Federcharakteristiken genommen werden kann.In addition to the already described clamping elements 13, which are inserted side by side in the axial direction into a number of recesses 12 corresponding to their number, continuous sheet-shaped clamping elements 20 or 21 can also be provided. These are provided both with a hook-shaped end 14 for fixing the rear edge 6 of a printing form 4 and with a barb 15. They can be provided with as well as without cut-outs in the axial direction, depending on the required spring or clamping characteristics. It is obvious that the choice of material can also influence the spring characteristics.

Die Höhe der durch das Betätigungsorgan 17 aufzubringenden Kräfte hängt in jedem Fall von den verwendeten Spannelementen ab. Es ist möglich, außer einer druckbeaufschlagten Membran auch eine verschwenkbare Stellwelle mit einer einseitigen Abflachung zu benutzen, um die Verformung der Spannelemente 13, 20 und 21 zu bewirken.The level of the forces to be exerted by the actuator 17 depends in each case on the clamping elements used. In addition to a pressurized membrane, it is also possible to use a pivotable actuating shaft with a flattening on one side in order to cause the deformation of the tensioning elements 13, 20 and 21.

Die Erfindung ist in keiner Weise auf die beschriebenen und dargestellten Ausführungsbeispiele begrenzt, aber der Fachmann kann jede dem Wesen der Erfindung entsprechende Art von Weiterbildung vorsehen.The invention is in no way limited to the exemplary embodiments described and illustrated, but the person skilled in the art can provide any type of further development corresponding to the essence of the invention.

Im besonderen ist es möglich gemäß einer nicht dargestellten Weiterbildung vorzusehen, daß jedes Spannelement von dem Betätigungsorgan elastisch mit dem Ziel verformt wird, die biegsame Druckform während des Normalbetriebes der Maschine auf dem Druckformzylinder festzuhalten und daß sowohl das Auf- als auch das Ausspannen der biegsamen Druckform durch die Freigabe jedes Spannelementes erreicht wird wodurch es seine Ausgangsform und Eigensteifigkeit wiederfindet.In particular, it is possible according to a further development, not shown, to provide that each clamping element is elastically deformed by the actuating member with the aim of holding the flexible printing form on the printing form cylinder during normal operation of the machine and that both the clamping and the unclamping of the flexible printing form is achieved by the release of each clamping element, whereby it finds its original shape and inherent rigidity.

Claims (14)

Vorrichtung zum Befestigen einer biegsamen Druckform (4) auf dem Druckformzylinder (1) einer Druckmaschine mit mindestens einem in Achsrichtung verlaufenden Schlitz wobei sich mindestens eine blattförmige Feder in dem Schlitz befindet die mit einer Rundung abschließt und eine Abkantung einer biegsamen Druckform fixiert,
dadurch gekennzeichnet,
daß jedes blattförmige Element (13,20,21) ein Spannelement ist, welches in einem ein jedes Spannelement verformenden Betätigungsorgan (17) aufnehmenden röhrenförmigen Träger (11) aufgenommen ist.
Device for fastening a flexible printing form (4) on the printing form cylinder (1) of a printing press with at least one slot running in the axial direction, with at least one leaf-shaped spring in the slot which ends with a curve and fixes a fold of a flexible printing form,
characterized by
that each leaf-shaped element (13, 20, 21) is a tensioning element which is received in a tubular support (11) receiving an actuating element (17) deforming each tensioning element.
Vorrichtung gemäß Anspruch 1,
dadurch gekennzeichnet, daß das jedes Spannelement (13,20,21) verformende Betätigungsorgan ein druckmittelbeaufschlagter Membrankörper (17) ist.
Device according to claim 1,
characterized in that the actuating member deforming each tensioning element (13, 20, 21) is a diaphragm body (17) pressurized with pressure medium.
Vorrichtung gemäß Anspruch 1,
dadurch gekennzeichnet, daß das jedes Spannelement (13,20,21) verformende Betätigungsorgan ein mechanisches Mittel ist.
Device according to claim 1,
characterized in that the actuating member deforming each tensioning element (13, 20, 21) is a mechanical means.
Vorrichtung gemäß Anspruch 3,
dadurch gekennzeichnet, daß das mechanische Mittel eine mit einer Abflachung am Umfang versehene verschwenkbare Stellwelle ist.
Device according to claim 3,
characterized in that the mechanical means is a pivotable actuating shaft provided with a flattened circumference.
Vorrichtung gemäß Anspruch 1,
dadurch gekennzeichnet, daß der röhrenförmige Träger (11) in einer Axialbohrung des Druckformzylinders (1) verdrehbar ist.
Device according to claim 1,
characterized in that the tubular support (11) can be rotated in an axial bore of the printing form cylinder (1).
Vorrichtung gemäß Anspruch 1,
dadurch gekennzeichnet, daß der röhrenförmige Träger (11) mindestens ein Paar sich in axiale Richtung erstreckende Ausnehmungen (12) aufweist.
Device according to claim 1,
characterized in that the tubular support (11) has at least one pair of recesses (12) extending in the axial direction.
Vorrichtung gemäß Anspruch 6,
dadurch gekennzeichnet, daß das Paar Ausnehmungen (12) im röhrenförmigen Träger (11) einander gegenüberliegend angeordnet ist.
Device according to claim 6,
characterized in that the pair of recesses (12) are arranged opposite each other in the tubular support (11).
Vorrichtung gemäß Anspruch 1,
dadurch gekennzeichnet, daß der Schlitz einen Spannkanal (8) definiert, der durch Seitenwände (9,10) begrenzt ist, die Axialbohrung durchsetzt und einen fluchtenden Spannkanalfortsatz umfaßt.
Device according to claim 1,
characterized in that the slot defines a tension channel (8) which is delimited by side walls (9, 10), passes through the axial bore and comprises an aligned tension channel extension.
Vorrichtung gemäß Anspruch 8,
dadurch gekennzeichnet, daß jedes blattförmige Spannelement (13,20,21) ein Widerlager (15) aufweist das in den Spannkanalfortsatz (16) eingreift.
Device according to claim 8,
characterized in that each leaf-shaped tensioning element (13, 20, 21) has an abutment (15) which engages in the tensioning channel extension (16).
Vorrichtung gemäß einem der Ansprüche 7 oder 8,
dadurch gekennzeichnet, daß im Zustand "Klemmen" jedes blattförmige Spannelement (13,20,21) an einer Begrenzung des Spannkanalfortsatzes (16) sowie an einer Begrenzung der oberen dem Spannkanal (8) zugeordneten Ausnehmung (12) anliegt.
Device according to one of claims 7 or 8,
characterized in that, in the "clamp" state, each leaf-shaped tensioning element (13, 20, 21) bears against a boundary of the tensioning channel extension (16) and against a boundary of the upper recess (12) associated with the tensioning channel (8).
Vorrichtung gemäß den Ansprüchen 1 bis 10
dadurch gekennzeichnet, daß bei Verdrehung des röhrenförmigen Trägers (11) in Entsicherungsrichtung (19) das Paar Ausnehmungen (12) mit dem Spannkanal (8) und dessen Fortsatz (16) fluchtet, so daß jedes blattförmige Spannelement (13,20,21) in Aushängerichtung (18) entnehmbar ist.
Device according to claims 1 to 10
characterized in that when the tubular support (11) is rotated in the unlocking direction (19), the pair of recesses (12) aligned with the tensioning channel (8) and its extension (16) so that each leaf-shaped tensioning element (13, 20, 21) can be removed in the direction of removal (18).
Vorrichtung gemäß Anspruch 1,
dadurch gekennzeichnet, daß der röhrenförmige Träger (11) in axialer Richtung verteilt, mehrere blattförmige Spannelemente (13) aufnimmt.
Device according to claim 1,
characterized in that the tubular support (11) is distributed in the axial direction and receives a plurality of leaf-shaped clamping elements (13).
Vorrichtung gemäß Anspruch 1,
dadurch gekennzeichnet, daß der röhrenförmige Träger (11) ein blattförmiges Spannelement (20) aufnimmt, welches in axialer Richtung verteilt Ausbrüche aufweist.
Device according to claim 1,
characterized in that the tubular support (11) receives a leaf-shaped clamping element (20) which has cutouts distributed in the axial direction.
Vorrichtung gemäß Anspruch 1,
dadurch gekennzeichnet, daß der röhrenförmige Träger (11) ein in axialer Richtung kontinuierliches blattförmiges Spannelement (21) aufnimmt.
Device according to claim 1,
characterized in that the tubular support (11) receives a sheet-shaped clamping element (21) which is continuous in the axial direction.
EP95115212A 1994-11-24 1995-09-27 Device for mounting a flexible printing plate Expired - Lifetime EP0713770B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9414093A FR2727350B1 (en) 1994-11-24 1994-11-24 FIXING DEVICE FOR A FLEXIBLE PRINTING FORM
FR9414093 1994-11-24

Publications (2)

Publication Number Publication Date
EP0713770A1 true EP0713770A1 (en) 1996-05-29
EP0713770B1 EP0713770B1 (en) 1998-05-20

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ID=9469115

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95115212A Expired - Lifetime EP0713770B1 (en) 1994-11-24 1995-09-27 Device for mounting a flexible printing plate

Country Status (6)

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US (1) US5738012A (en)
EP (1) EP0713770B1 (en)
JP (1) JPH08230157A (en)
CN (1) CN1130568A (en)
DE (1) DE59502239D1 (en)
FR (1) FR2727350B1 (en)

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EP1071558A4 (en) * 1998-02-17 2001-07-11 Goss Graphic Syst Inc Spring clip plate retainer
WO2000073075A3 (en) * 1999-05-29 2002-10-17 Koenig & Bauer Ag Device for fixing a flexible plate
WO2002043962A3 (en) * 2000-11-28 2002-12-05 Koenig & Bauer Ag Device for securing a packing and method for producing a channel
DE102005002684A1 (en) * 2005-01-20 2006-08-03 Man Roland Druckmaschinen Ag Plate cylinder with a device for fixing circumferentially attachable printing plates
DE102007002029B3 (en) * 2007-01-13 2008-04-10 Koenig & Bauer Aktiengesellschaft Rotary printing press's cylinder e.g. plate cylinder, has stop unit extending over entire width of cylinder cavity and comprising opening through which retaining units pass in direction of attachment slot

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DE19924787B4 (en) * 1999-05-29 2004-11-04 Koenig & Bauer Ag Device for attaching flexible plates
DE10015165B4 (en) * 2000-03-27 2004-01-29 Koenig & Bauer Ag Device for supplying pressure medium
DE10236867B3 (en) * 2002-08-12 2004-03-25 Koenig & Bauer Ag Holder for blanket cylinder has pivoting retainer in channel defining tangential wall in periphery of cylinder
US6705226B1 (en) 2002-08-29 2004-03-16 Agfa Corporation Media clamping apparatus and method for an external drum imaging system
DE10250684B3 (en) * 2002-10-31 2004-04-01 Koenig & Bauer Ag Production of a rotational body of a printing machine comprises forming profiled bodies by welding material to opposite-lying walls of a groove in the peripheral direction of the balls in the machine
DE102004020694A1 (en) * 2004-04-28 2005-11-24 Heidelberger Druckmaschinen Ag Device for clamping and holding a printing plate on a printing plate on an exposure drum
US6994027B1 (en) * 2005-03-03 2006-02-07 Agfa Corporation Device and method to prevent movement of a printing plate during clamping
DE102007024426A1 (en) * 2007-05-25 2008-12-04 Maschinenfabrik Wifag Clamping device for printing plates
US9113845B2 (en) * 2009-01-08 2015-08-25 Given Imaging Ltd. Device and method for assembling in vivo sensing devices
CN105015147A (en) * 2015-07-14 2015-11-04 孙光英 Printing roller

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1071558A4 (en) * 1998-02-17 2001-07-11 Goss Graphic Syst Inc Spring clip plate retainer
WO2000073075A3 (en) * 1999-05-29 2002-10-17 Koenig & Bauer Ag Device for fixing a flexible plate
EP1340617A2 (en) 1999-05-29 2003-09-03 Koenig & Bauer Aktiengesellschaft Device for attaching a flexible printing plate
EP1340617A3 (en) * 1999-05-29 2004-02-04 Koenig & Bauer Aktiengesellschaft Device for attaching a flexible printing plate
DE19924786B4 (en) * 1999-05-29 2004-11-04 Koenig & Bauer Ag Device for attaching a flexible plate to a cylinder of a rotary printing press
WO2002043962A3 (en) * 2000-11-28 2002-12-05 Koenig & Bauer Ag Device for securing a packing and method for producing a channel
US6862991B2 (en) 2000-11-28 2005-03-08 Koenig & Bauer Ajtuebgesekkscgaft Cylinder and device for securing a flexible packing on the cylinder
DE102005002684A1 (en) * 2005-01-20 2006-08-03 Man Roland Druckmaschinen Ag Plate cylinder with a device for fixing circumferentially attachable printing plates
US7487725B2 (en) 2005-01-20 2009-02-10 Man Roland Druckmaschinen Ag Method and apparatus for securing a printing plate on a plate cylinder
DE102007002029B3 (en) * 2007-01-13 2008-04-10 Koenig & Bauer Aktiengesellschaft Rotary printing press's cylinder e.g. plate cylinder, has stop unit extending over entire width of cylinder cavity and comprising opening through which retaining units pass in direction of attachment slot

Also Published As

Publication number Publication date
FR2727350A1 (en) 1996-05-31
EP0713770B1 (en) 1998-05-20
FR2727350B1 (en) 1997-02-14
US5738012A (en) 1998-04-14
DE59502239D1 (en) 1998-06-25
JPH08230157A (en) 1996-09-10
CN1130568A (en) 1996-09-11

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