EP0705690A1 - Sheet guiding cylinder, with an adjustable outside diameter - Google Patents

Sheet guiding cylinder, with an adjustable outside diameter Download PDF

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Publication number
EP0705690A1
EP0705690A1 EP95113141A EP95113141A EP0705690A1 EP 0705690 A1 EP0705690 A1 EP 0705690A1 EP 95113141 A EP95113141 A EP 95113141A EP 95113141 A EP95113141 A EP 95113141A EP 0705690 A1 EP0705690 A1 EP 0705690A1
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EP
European Patent Office
Prior art keywords
sheet guide
shaft
guide drum
drum according
adjusting
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Granted
Application number
EP95113141A
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German (de)
French (fr)
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EP0705690B1 (en
Inventor
Karlheinz Sellmann
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Manroland AG
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MAN Roland Druckmaschinen AG
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Publication of EP0705690A1 publication Critical patent/EP0705690A1/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41FPRINTING MACHINES OR PRESSES
    • B41F21/00Devices for conveying sheets through printing apparatus or machines
    • B41F21/10Combinations of transfer drums and grippers

Definitions

  • the invention relates to a sheet guide drum for rotary printing presses, the outer diameter of which can be changed by means of a spring-loaded cylinder lift and radially adjustable support elements.
  • a device for compensating for the change in the printing length of a sheet of paper when passing through one or more printing units of a printing press in which the cylinder of a sheet guide drum consists of a tubular body fastened to a drive shaft.
  • This tubular body has an axially parallel slot along its longitudinal axis.
  • means are provided through which the tubular body can be expanded, so that a concentric increase in the tubular body diameter can be set in a defined manner.
  • Support disks on which the tubular body is supported via conical surfaces are to be hydraulically displaced axially against the force of a return spring.
  • a uniform expansion of the tubular body is dependent on the fact that the same friction conditions prevail everywhere in the conical contact surfaces. If this is not the case, there can be an uneven axial displacement with a correspondingly uneven expansion of the tubular body.
  • a sheet guide drum has become known, in which the outside diameter can be changed to adapt to different thicknesses of paper.
  • a height-variable element is arranged between a circumferentially adjustable cladding film and the surface of the sheet guide drum, various embodiments of this element in particular being considered, which have a large number of elastically flexible supporting elements, the radial extent of which depends on how strongly the cladding film is stretched.
  • this known sheet guide drum it is disadvantageous that an exact concentricity of the jacket film is not guaranteed, because the uniform change in diameter depends both on the manufacturing accuracy of the individual flexible supporting elements and on the respective local friction and wear conditions.
  • the concentricity also depends on the inherent rigidity of the cladding film, the selection of which always forces a compromise between sufficient load-bearing capacity and sufficient flexibility with regard to the variable clamping conditions .
  • the invention has for its object to develop a sheet guide drum of the type mentioned so that the disadvantages existing in a non-positive, dependent on the friction and the spring properties of the components involved change in diameter and that a satisfactory in terms of uniformity of expansion and concentricity Result can be achieved.
  • an elastically deformable cylinder jacket is provided between the cylinder lift and the support elements, that the support elements in a fixed with the sheet guide drum connected guide element are mounted radially displaceable and that the support elements rest on the outside of the cylinder jacket and are supported on the inside on abutments of an adjusting disc, the effective radial distance from the shaft can be changed continuously by rotating the adjusting disc relative to the shaft.
  • an elastically deformable cylinder jacket was provided, which can be easily manufactured in a constant thickness and whose deformation properties can be adjusted within wide limits to the desired conditions. In this way it is possible - unlike with a metal foil or with a cylinder lift - to make the areas between the support points formed by the support elements so rigid that the required concentricity of the sheet guide drum can be ensured.
  • a solution is thus proposed which is superior to the known embodiments in terms of production technology and function and whose structural outlay does not go beyond the scope of the known sheet guide drums.
  • the sheet guide drum also has the advantage that only small actuating forces are required to change its outside diameter.
  • the adjusting disk for forming ramp-like abutments has a sawtooth-like outer contour, each support element being assigned an abutment whose radial distance from the shaft changes continuously, preferably spirally, in the circumferential direction.
  • the support elements can consist of rollers which are rotatably mounted in a guide element constructed from disks. However, they can also consist of sliding pins which are radially displaceably mounted in a guide element designed as a ring.
  • a constructive alternative is that an elastically deformable cylinder jacket is provided between the cylinder lift and support elements, that the radially adjustable, on the outside forming a support for the cylinder jacket support elements consist of cams which are rotatable about axes parallel to the shaft of the sheet guide drum in a fixed with the shaft connected guide element are mounted and that the cams have a lever-like projection on the inside, which engages in recesses of an adjusting disc which is rotatable relative to the shaft.
  • the cams on the outside have a contour which, when the cams rotate, causes a constant change in the radial distance of the cylinder jacket from the shaft.
  • the adjusting disc is rotatably mounted on the shaft of the sheet guide drum and can be rotated relative to the shaft by means of an adjusting screw.
  • Two guide elements arranged at the end and two associated adjusting disks are preferably provided. Between the guide elements arranged at the ends and adjusting discs, however, at least one additional guide element with at least one additional adjusting disc can be arranged. It is expedient if only one set screw is provided and the setting disks are connected to one another in a rotationally fixed manner by means of a cross member.
  • the guide elements have a circumferential recess for the crossmember.
  • the guide element consisting of disks has radial cutouts for the storage of the rollers.
  • the sheet guiding drum according to FIG. 1 essentially consists of a driven shaft 1, which is rotatably connected to a hub 2, one with the shaft 1 as well non-rotatably connected guide element 3, in which rollers 4 are mounted, and an adjusting disc 5 with abutments 6, which are formed by a sawtooth-like outer contour.
  • the rollers carry an elastically deformable cylinder jacket 7 and a cylinder support 8 clamped by means of springs 9.
  • a gripper shaft 10, a gripper 11 and a gripper support 12 are arranged in a gripper channel, but these can be disregarded for the invention.
  • the gripper shaft 10 is mounted in a flange 13 which is connected to the shaft 1 in a rotationally fixed manner and to which the springs 9 are fastened.
  • an adjusting screw 15 is mounted, by means of which the adjusting disk 5 can be rotated relative to the sheet guide drum, ie relative to the shaft 1 thereof, via a cross member 16.
  • a suitable bearing 17 is provided between the adjusting disc 5 and the hub 2.
  • a spindle driven by a motor can be provided for rotating the adjusting disk 5. The motor is controlled via the control station of the printing press in such a way that the cylinder diameter is adapted to the thickness of the printing material to be processed in such a way that optimal processing conditions are achieved.
  • the rollers 4 on the abutments 6 move into a position which is displaced radially outward. They take with them the elastically deformable cylinder jacket 7 and the cylinder support 8 clamped by means of springs 9 and thus bring about a uniform increase in diameter over the entire effective circumference of the sheet guide drum.
  • the rollers 4 move radially inward under the action of the springs 9 and the restoring force of the cylinder jacket 7, whereby the diameter is evenly reduced.
  • Figures 2 and 3 show an enlarged section of Figure 1, in which some details are shown in more detail.
  • the hub 2 is fastened on the shaft 1 by means of a notch pin 18 or the like.
  • the guide element 3 formed from two disks 19, 20 is attached to the hub 2 by means of screws 21. Between the disks 19, 20, the rollers 4 are rotatably and radially displaceably mounted in radially extending recesses 22 via stub shafts 23.
  • the adjusting disc 5 with a sawtooth-like outer contour or the ramp-like abutments 6 for supporting the rollers 4 is arranged, which is adjustable by means of the cross member 16 relative to the hub 2 and the discs 19, 20 in the circumferential direction and in turn is supported on the hub 2 via the bearing 17.
  • the abutments 6 are formed by flat surfaces which are each aligned perpendicular to a radius intersecting the tip of a sawtooth. The rollers 4 are pressed against the abutment 6 by the spring-loaded cylinder lift 8 and the cylinder jacket 7.
  • a recess 24, which extends in the circumferential direction, for the crossmember 16 is formed in the disks 19, 20.
  • the cutouts 22 and 24 allow the radial displacement of the rollers 4 on the one hand and the rotation of the cross member 16 and the adjusting disk 5 relative to the disks 19, 20 in the circumferential direction on the other hand, the cutout 24 having no guiding function.
  • Figure 4 shows a longitudinal section through the embodiment of Figure 1, it is particularly important to make it clear that the variable diameter support for the cylinder jacket 7 or the elastically clamped cylinder lift 8 in the axial direction of the sheet guide drum not only at the end, but depending on Need more than two can be provided.
  • the axial distance between the rollers 4 - within construction predetermined limits - can be varied as required and adapted to the most varied of requirements in conjunction with the design of the inherent rigidity of the cylinder jacket 7.
  • All adjusting discs 5 are rotatably mounted on the hubs 2 and can be moved in the same direction by means of the cross member 16.
  • the rollers 4 are rotatably and radially displaceably mounted in the disks 19, 20.
  • hubs 25 with integrally molded flanges 13 are provided in the usual way, one of these hubs 25 having a second flange 14 on which the (only indicated) adjusting screw 15 for adjusting the cross member 16 supports.
  • the hubs 25 are also non-rotatably connected to the shaft 1 by grooved pins 18 or the like.
  • sliding pins 26 are provided which are supported on the inside on the ramp-like abutments 6 of the adjusting disk 5 and serve on the outside as a support for the cylinder jacket 7.
  • the sliding pins 26 are radially displaceably mounted in a guide element 3 designed as a ring, which is itself connected to the shaft 1 of the sheet guide drum in a rotationally fixed manner. As with the rollers 4, the change in diameter is effected by rotating the adjusting disc 5 relative to the ring 26.
  • the support elements consist of cams 27 which are rotatably mounted in a guide element 3.
  • the cams 17 engage in an adjusting disc 29 which has cutouts 30 on the edge and can be rotated relative to the guide element 3.
  • the outer contour of the cams 27 is selected such that, when the adjusting disk 29 rotates and the cams 26 are rotated about its bearing axis, a constant change in the distance between the bearing surface for the cylinder jacket 7 on the cam 26 from the center of the sheet guide drum and thus the desired change in diameter is effected.

Landscapes

  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
  • Steering Controls (AREA)
  • Lift-Guide Devices, And Elevator Ropes And Cables (AREA)

Abstract

The sheet guide drum for a rotary printing machine has its outer dia. adjustable by a sprung, tensioned cylinder lift (8) and radially adjustable support components (4). Between the cylinder lift and the support components an elastically deformable cylinder cover (7) is provided. The support components are radially displaceably located in a guide member (3) fixed to the sheet guide drum. The support components locate on the outside of the cylinder cover and support on the inside on counter bearings (6) of a positioning plate (5), the effective radial distance from the shaft (1) is continuously alterable by rotation of the positioning plate relatively to the shaft.

Description

Die Erfindung betrifft eine Bogenführungstrommel für Rotationsdruckmaschinen, deren Außendurchmesser mittels eines federnd eingespannten Zylinderaufzugs und radial verstellbarer Tragelemente veränderbar ist.The invention relates to a sheet guide drum for rotary printing presses, the outer diameter of which can be changed by means of a spring-loaded cylinder lift and radially adjustable support elements.

Aus der DE 2946252 A 1 ist eine Vorrichtung zum Ausgleich der Drucklängenänderung eines Papierbogens beim Durchlaufen eines oder mehrerer Druckwerke einer Druckmaschine bekanntgeworden, bei dem der Zylinder einer Bogenführungstrommel aus einem auf einer Antriebswelle befestigten Rohrkörper besteht. Dieser Rohrkörper weist entlang seiner Längsachse einen achsparallelen Schlitz auf. Außerdem sind Mittel vorgesehen, durch die der Rohrkörper aufgeweitet werden kann, so daß eine konzentrische Zunahme des Rohrkörperdurchmessers definiert einstellbar ist. Dabei sollen Stützscheiben, auf denen der Rohrkörper über konische Flächen abgestützt ist, gegen die Kraft einer Rückstellfeder hydraulisch axial verschoben werden. Bei dieser Vorrichtung ist ein gleichmäßiges Aufweiten des Rohrkörpers davon abhängig, daß in den konischen Kontaktflächen überall die gleichen Reibungsverhältnisse herrschen. Ist dies nicht der Fall, so kann es zu einer ungleichmäßige Axialverschiebung mit entsprechend ungleichmäßiger Aufweitung des Rohrkörpers kommen.From DE 2946252 A 1 a device for compensating for the change in the printing length of a sheet of paper when passing through one or more printing units of a printing press has become known, in which the cylinder of a sheet guide drum consists of a tubular body fastened to a drive shaft. This tubular body has an axially parallel slot along its longitudinal axis. In addition, means are provided through which the tubular body can be expanded, so that a concentric increase in the tubular body diameter can be set in a defined manner. Support disks on which the tubular body is supported via conical surfaces are to be hydraulically displaced axially against the force of a return spring. In this device, a uniform expansion of the tubular body is dependent on the fact that the same friction conditions prevail everywhere in the conical contact surfaces. If this is not the case, there can be an uneven axial displacement with a correspondingly uneven expansion of the tubular body.

Aus der DE 3902923 A 1 ist eine Bogenführungstrommel bekanntgeworden, bei der der Außendurchmesser zur Anpassung an unterschiedlich dicke Papiersorten veränderlich ist. Zwischen einer in Umfangsrichtung verstellbar eingespannten Mantelfolie und der Oberfläche der Bogenführungstrommel ist ein höhenvariables Element angeordnet, wobei insbesondere verschiedene Ausführungsformen dieses Elementes in Betracht kommen sollen, die eine Vielzahl elastisch nachgiebiger Tragelemente aufweisen, deren radiale Erstreckung davon abhängt, wie stark die Mantelfolie gespannt wird. Bei dieser bekannten Bogenführungstrommel ist nachteilig, daß ein exakter Rundlauf der Mantelfolie nicht gewährleistet ist, weil die gleichmäßige Veränderung des Durchmessers sowohl von der Fertigungsgenauigkeit der einzelnen nachgiebigen Tragelemente als auch von den jeweiligen örtlichen Reibungs- und Abnutzungsverhältnissen abhängig ist. Soweit die relativ dünne Mantelfolie auf den Tragelementen nur punkt- oder linienförmig abgestützt ist, hängt der Rundlauf auch noch von der Eigensteifigkeit der Mantelfolie ab, bei deren Auswahl man immer zu einem Kompromiß zwischen ausreichender Tragfähigkeit und ausreichender Flexibilität im Hinblick auf die veränderlichen Einspannbedingungen gezwungen ist.From DE 3902923 A 1, a sheet guide drum has become known, in which the outside diameter can be changed to adapt to different thicknesses of paper. A height-variable element is arranged between a circumferentially adjustable cladding film and the surface of the sheet guide drum, various embodiments of this element in particular being considered, which have a large number of elastically flexible supporting elements, the radial extent of which depends on how strongly the cladding film is stretched. In this known sheet guide drum, it is disadvantageous that an exact concentricity of the jacket film is not guaranteed, because the uniform change in diameter depends both on the manufacturing accuracy of the individual flexible supporting elements and on the respective local friction and wear conditions. To the extent that the relatively thin cladding film is only supported in a point or line shape on the support elements, the concentricity also depends on the inherent rigidity of the cladding film, the selection of which always forces a compromise between sufficient load-bearing capacity and sufficient flexibility with regard to the variable clamping conditions .

Der Erfindung liegt die Aufgabe zugrunde, eine Bogenführungstrommel der eingangs genannten Art so weiterzubilden, daß die bei einer kraftschlüssig bewirkten, von der Reibung und den Federeigenschaften der beteiligten Bauteile abhängigen Durchmesseränderung bestehenden Nachteile vermieden werden können und daß ein hinsichtlich Gleichmäßigkeit der Aufweitung und des Rundlaufs zufriedenstellendes Ergebnis erreicht werden kann.The invention has for its object to develop a sheet guide drum of the type mentioned so that the disadvantages existing in a non-positive, dependent on the friction and the spring properties of the components involved change in diameter and that a satisfactory in terms of uniformity of expansion and concentricity Result can be achieved.

Zur Lösung dieser Aufgabe wird erfindungsgemäß vorgeschlagen, daß zwischen Zylinderaufzug und Tragelementen ein elastisch verformbarer Zylindermantel vorgesehen ist, daß die Tragelemente in einem fest mit der Bogenführungstrommel verbundenen Führungselement radial verschiebbar gelagert sind und daß die Tragelemente außenseitig am Zylindermantel anliegen und sich innenseitig auf Widerlagern einer Stellscheibe abstützen, deren wirksamer radialer Abstand von der Welle durch Drehen der Stellscheibe relativ zur Welle stetig veränderbar ist.To achieve this object, it is proposed according to the invention that an elastically deformable cylinder jacket is provided between the cylinder lift and the support elements, that the support elements in a fixed with the sheet guide drum connected guide element are mounted radially displaceable and that the support elements rest on the outside of the cylinder jacket and are supported on the inside on abutments of an adjusting disc, the effective radial distance from the shaft can be changed continuously by rotating the adjusting disc relative to the shaft.

Eine maßgebliche Erkenntnis der Erfindung besteht darin, daß die angestrebte Durchmesseränderung in dem erforderlichen Umfang und mit der erforderlichen Genauigkeit mittels kraftschlüssig arbeitender Tragelemente nicht realisierbar sein kann. Es werden daher Tragelemente vorgesehen, bei denen die Durchmesseränderung auf gleichsinnig bewegten und formschlüssig wirkenden Bauteilen beruht, die sich mit jeder gewünschten Genauigkeit herstellen lassen. Mit anderen Worten, die Durchmesseränderung ist nicht mehr davon abhängig, daß eine Vielzahl nur mehr oder weniger genau herstellbarer Bauteile die gleichen Federungs- und Reibungseigenschaften aufweisen, sie beruht vielmehr auf exakt herstellbaren Bauteilen, bei denen es praktisch nur auf die sicher reproduzierbaren Abmessungen ankommt. Außerdem wurde zur Verbesserung des Rundlaufs zwischen den radial veränderbaren Tragelementen und dem Zylinderaufzug ein elastisch verformbarer Zylindermantel vorgesehen, der ohne weiteres in gleichbleibender Dicke herstellbar ist und dessen Verformungseigenschaften in weiten Grenzen auf die jeweils gewünschten Verhältnisse abgestellt werden können. Auf diese Weise ist es - anders als nur mit einer Metallfolie bzw. mit einem Zylinderaufzug - möglich, die Bereiche zwischen den durch die Tragelemente gebildeten Stützpunkten so steif auszubilden, daß der erforderliche Rundlauf der Bogenführungstrommel gewährleistet werden kann. Damit wird eine Lösung vorgeschlagen, die den bekannten Ausführungsformen fertigungstechnisch und funktionell überlegen ist und deren baulicher Aufwand nicht über den Rahmen der bekannten Bogenführungstrommeln hinausgeht. Die erfindungsgemäße Bogenführungstrommel hat weiterhin den Vorteil, daß zur Änderung ihres Außendurchmessers nur geringe Stellkräfte erforderlich sind.An important finding of the invention is that the desired change in diameter to the required extent and with the required accuracy cannot be achieved by means of non-positive supporting elements. Support elements are therefore provided in which the change in diameter is based on components which move in the same direction and act in a form-fitting manner and which can be produced with any desired accuracy. In other words, the change in diameter is no longer dependent on the fact that a large number of components which can only be produced to a greater or lesser degree have the same suspension and friction properties, but rather is based on components which can be produced precisely and in which practically only the reliably reproducible dimensions are important. In addition, to improve the concentricity between the radially changeable support elements and the cylinder lift, an elastically deformable cylinder jacket was provided, which can be easily manufactured in a constant thickness and whose deformation properties can be adjusted within wide limits to the desired conditions. In this way it is possible - unlike with a metal foil or with a cylinder lift - to make the areas between the support points formed by the support elements so rigid that the required concentricity of the sheet guide drum can be ensured. A solution is thus proposed which is superior to the known embodiments in terms of production technology and function and whose structural outlay does not go beyond the scope of the known sheet guide drums. The invention The sheet guide drum also has the advantage that only small actuating forces are required to change its outside diameter.

In weiterer Ausgestaltung des Erfindungsgedankens ist vorgesehen, daß die Stellscheibe zur Bildung rampenartiger Widerlager eine sägezahnartige Außenkontur aufweist, wobei jedem Tragelement ein Widerlager zugeordnet ist, dessen radialer Abstand von der Welle sich in Umfangsrichtung stetig, vorzugsweise spiralförmig ändert.In a further embodiment of the concept of the invention, it is provided that the adjusting disk for forming ramp-like abutments has a sawtooth-like outer contour, each support element being assigned an abutment whose radial distance from the shaft changes continuously, preferably spirally, in the circumferential direction.

Die Tragelemente können aus Rollen bestehen, die in einem aus Scheiben aufgebauten Führungselement drehbar gelagert sind. Sie können aber auch aus Gleitstiften bestehen, die in einem als Ring ausgebildeten Führungselement radial verschieblich gelagert sind.The support elements can consist of rollers which are rotatably mounted in a guide element constructed from disks. However, they can also consist of sliding pins which are radially displaceably mounted in a guide element designed as a ring.

Eine konstruktive Alternative besteht darin, daß zwischen Zylinderaufzug und Tragelementen ein elastisch verformbarer Zylindermantel vorgesehen ist, daß die radial verstellbaren, außenseitig eine Auflage für den Zylindermantel bildenden Tragelemente aus Nocken bestehen, die um zur Welle der Bogenführungstrommel parallele Achsen drehbar in einem fest mit der Welle verbundenen Führungselement gelagert sind und daß die Nocken innenseitig einen hebelartigen Ansatz aufweisen, der in Aussparungen einer Stellscheibe eingreift, die relativ zur Welle drehbar ist. Dabei weisen die Nocken außenseitig eine Kontur auf, die bei einer Drehung der Nocken eine stetige Veränderung des radialen Abstandes des Zylindermantels von der Welle bewirkt.A constructive alternative is that an elastically deformable cylinder jacket is provided between the cylinder lift and support elements, that the radially adjustable, on the outside forming a support for the cylinder jacket support elements consist of cams which are rotatable about axes parallel to the shaft of the sheet guide drum in a fixed with the shaft connected guide element are mounted and that the cams have a lever-like projection on the inside, which engages in recesses of an adjusting disc which is rotatable relative to the shaft. The cams on the outside have a contour which, when the cams rotate, causes a constant change in the radial distance of the cylinder jacket from the shaft.

Die Stellscheibe ist auf der Welle der Bogenführungstrommel drehbar gelagert und mittels einer Stellschraube relativ zur Welle verdrehbar. Vorzugsweise sind zwei endseitig angeordnete Führungselemente und zwei zugehörige Stellscheiben vorgesehen. Zwischen den endseitig angeordneten Führungselementen und Stellscheiben kann aber wenigstens ein weiteres Führungselement mit wenigstens einer weiteren Stellscheibe angeordnet werden. Dabei ist es zweckmäßig, wenn nur eine Stellschraube vorgesehen wird und die Stellscheiben mittels einer Traverse drehfest miteinander verbunden sind.The adjusting disc is rotatably mounted on the shaft of the sheet guide drum and can be rotated relative to the shaft by means of an adjusting screw. Two guide elements arranged at the end and two associated adjusting disks are preferably provided. Between the guide elements arranged at the ends and adjusting discs, however, at least one additional guide element with at least one additional adjusting disc can be arranged. It is expedient if only one set screw is provided and the setting disks are connected to one another in a rotationally fixed manner by means of a cross member.

Die Führungselemente weisen eine in Umfangsrichtung verlaufende Aussparung für die Traverse auf. Demgegenüber weist das aus Scheiben bestehende Führungselement radiale Aussparungen für die Lagerung der Rollen auf.The guide elements have a circumferential recess for the crossmember. In contrast, the guide element consisting of disks has radial cutouts for the storage of the rollers.

Weitere Einzelheiten der Erfindung werden anhand von Ausführungsbeispielen näher erläutert, die in der Zeichnung dargestellt sind. Es zeigen

Figur 1
ein erstes Ausführungsbeispiel einer erfindungsgemäßen Bogenführungstrommel im Querschnitt,
Figur 2
einen vergrößerten Ausschnitt der Bogenführungstrommel gemäß Figur 1,
Figur 3
einen Längsschnitt des Ausschnitts gemäß Figur 2,
Figur 4
einen Längsschnitt durch die Bogenführungstrommel gemäß Figur 1,
Figur 5
eine schematische Darstellung eines zweiten Ausführungsbeispiels der Erfindung,
Figur 6
eine schematische Darstellung eines dritten Ausführungsbeispiels der Erfindung.
Further details of the invention are explained in more detail with reference to exemplary embodiments which are shown in the drawing. Show it
Figure 1
a first embodiment of a sheet guide drum according to the invention in cross section,
Figure 2
2 shows an enlarged section of the sheet guide drum according to FIG. 1,
Figure 3
3 shows a longitudinal section of the detail according to FIG. 2,
Figure 4
2 shows a longitudinal section through the sheet guide drum according to FIG. 1,
Figure 5
2 shows a schematic illustration of a second exemplary embodiment of the invention,
Figure 6
is a schematic representation of a third embodiment of the invention.

Die Bogenführungstrommel gemäß Figur 1 besteht im wesentlichen aus einer angetriebenen Welle 1, die mit je einer Nabe 2 drehfest verbunden ist, einem mit der Welle 1 ebenfalls drehfest verbundenen Führungselement 3, in dem Rollen 4 gelagert sind, und einer Stellscheibe 5 mit Widerlagern 6, die durch eine sägezahnartige Außenkontur gebildet sind. Die Rollen tragen einen elastisch verformbaren Zylindermantel 7 und eine mittels Federn 9 eingespannte Zylinderauflage 8. In einem Greiferkanal sind eine Greiferwelle 10, ein Greifer 11 und eine Greiferauflage 12 angeordnet, die jedoch für die Erfindung außer Betracht bleiben können. Die Greiferwelle 10 ist in einem Flansch 13 gelagert, der mit der Welle 1 drehfest verbunden ist und an dem die Federn 9 befestigt sind. In einem weiteren mit der Welle 1 drehfest verbundenen Flansch 14 ist eine Stellschraube 15 gelagert, mit deren Hilfe die Stellscheibe 5 über eine Traverse 16 relativ zur Bogenführungstrommel, d. h. relativ zu deren Welle 1, verdrehbar ist. Zwischen der Stellscheibe 5 und der Nabe 2 ist ein geeignetes Lager 17 vorgesehen. Anstelle der Stellschraube 15 kann zum Verdrehen der Stellscheibe 5 eine durch einen Motor angetriebene Spindel vorgesehen sein. Der Motor wird über den Leitstand der Druckmaschine jeweils so angesteuert, daß der Zylinderdurchmesser der Dicke des zu bearbeitenden Druckstoffs derart angepaßt wird, daß optimale Abwicklungsverhältnisse erreicht werden.The sheet guiding drum according to FIG. 1 essentially consists of a driven shaft 1, which is rotatably connected to a hub 2, one with the shaft 1 as well non-rotatably connected guide element 3, in which rollers 4 are mounted, and an adjusting disc 5 with abutments 6, which are formed by a sawtooth-like outer contour. The rollers carry an elastically deformable cylinder jacket 7 and a cylinder support 8 clamped by means of springs 9. A gripper shaft 10, a gripper 11 and a gripper support 12 are arranged in a gripper channel, but these can be disregarded for the invention. The gripper shaft 10 is mounted in a flange 13 which is connected to the shaft 1 in a rotationally fixed manner and to which the springs 9 are fastened. In a further flange 14 which is connected in a rotationally fixed manner to the shaft 1, an adjusting screw 15 is mounted, by means of which the adjusting disk 5 can be rotated relative to the sheet guide drum, ie relative to the shaft 1 thereof, via a cross member 16. A suitable bearing 17 is provided between the adjusting disc 5 and the hub 2. Instead of the adjusting screw 15, a spindle driven by a motor can be provided for rotating the adjusting disk 5. The motor is controlled via the control station of the printing press in such a way that the cylinder diameter is adapted to the thickness of the printing material to be processed in such a way that optimal processing conditions are achieved.

Wird die Stellscheibe 5 im Uhrzeigersinn gedreht, gelangen die Rollen 4 auf den Widerlagern 6 in eine radial weiter nach außen verschobene Position. Sie nehmen dabei den elastisch verformbaren Zylindermantel 7 und die mittels Federn 9 eingespannte Zylinderauflage 8 mit und bewirken so auf dem gesamten wirksamen Umfang der Bogenführungstrommel eine gleichmäßige Durchmesservergrößerung. Bei einer Drehung entgegen dem Uhrzeigersinn wandern die Rollen 4 unter der Wirkung der Federn 9 und der Rückstellkraft des Zylindermantels 7 radial nach innen, wodurch der Durchmesser gleichmäßig verkleinert wird.If the adjusting disc 5 is rotated clockwise, the rollers 4 on the abutments 6 move into a position which is displaced radially outward. They take with them the elastically deformable cylinder jacket 7 and the cylinder support 8 clamped by means of springs 9 and thus bring about a uniform increase in diameter over the entire effective circumference of the sheet guide drum. When rotating counterclockwise, the rollers 4 move radially inward under the action of the springs 9 and the restoring force of the cylinder jacket 7, whereby the diameter is evenly reduced.

Figur 2 und 3 zeigen einen vergrößerten Ausschnitt aus Figur 1, in dem einige Details genauer dargestellt sind. Auf der Welle 1 ist die Nabe 2 mittels eines Kerbstiftes 18 oder dergleichen befestigt. An der Nabe 2 ist das aus zwei Scheiben 19, 20 gebildete Führungselement 3 mittels Schrauben 21 angebracht. Zwischen den Scheiben 19, 20 sind die Rollen 4 in sich radial erstreckenden Aussparungen 22 über Wellenstümpfe 23 drehbar und radial verschiebbar gelagert. Außerdem ist zwischen den Scheiben 19, 20 die Stellscheibe 5 mit sägezahnartiger Außenkontur bzw. den rampenartigen Widerlagern 6 zur Abstützung der Rollen 4 angeordnet, die mittels der Traverse 16 relativ zur Nabe 2 und zu den Scheiben 19, 20 in Umfangsrichtung verstellbar ist und sich ihrerseits über das Lager 17 auf der Nabe 2 abstützt. Die Widerlager 6 werden durch ebene Flächen gebildet, die jeweils senkrecht zu einem die Spitze eines Sägezahns schneidenden Radius ausgerichtet sind. Die Rollen 4 werden durch den federnd eingespannten Zylinderaufzug 8 und den Zylindermantel 7 gegen die Widerlager 6 angedrückt.Figures 2 and 3 show an enlarged section of Figure 1, in which some details are shown in more detail. The hub 2 is fastened on the shaft 1 by means of a notch pin 18 or the like. The guide element 3 formed from two disks 19, 20 is attached to the hub 2 by means of screws 21. Between the disks 19, 20, the rollers 4 are rotatably and radially displaceably mounted in radially extending recesses 22 via stub shafts 23. In addition, between the discs 19, 20, the adjusting disc 5 with a sawtooth-like outer contour or the ramp-like abutments 6 for supporting the rollers 4 is arranged, which is adjustable by means of the cross member 16 relative to the hub 2 and the discs 19, 20 in the circumferential direction and in turn is supported on the hub 2 via the bearing 17. The abutments 6 are formed by flat surfaces which are each aligned perpendicular to a radius intersecting the tip of a sawtooth. The rollers 4 are pressed against the abutment 6 by the spring-loaded cylinder lift 8 and the cylinder jacket 7.

In den Scheiben 19, 20 ist eine sich in Umfangsrichtung erstreckende Aussparung 24 für die Traverse 16 ausgebildet. Die Aussparungen 22 und 24 ermöglichen einerseits die radiale Verschiebung der Rollen 4 und andererseits die Verdrehung der Traverse 16 und der Stellscheibe 5 relativ zu den Scheiben 19, 20 in Umfangsrichtung, wobei der Aussparung 24 keine Führungsfunktion zukommt.A recess 24, which extends in the circumferential direction, for the crossmember 16 is formed in the disks 19, 20. The cutouts 22 and 24 allow the radial displacement of the rollers 4 on the one hand and the rotation of the cross member 16 and the adjusting disk 5 relative to the disks 19, 20 in the circumferential direction on the other hand, the cutout 24 having no guiding function.

Figur 4 zeigt einen Längsschnitt durch das Ausführungsbeispiel gemäß Figur 1, wobei es insbesondere darauf ankommt, deutlich zu machen, daß die im Durchmesser variable Abstützung für den Zylindermantel 7 bzw. den elastisch eingespannten Zylinderaufzug 8 in Achsrichtung der Bogenführungstrommel nicht nur endseitig, sondern je nach Bedarf mehr als zweifach vorgesehen werden kann. Auf diese Weise kann der axiale Abstand der Rollen 4 - innerhalb konstruktiv vorgegebener Grenzen - beliebig variiert und in Verbindung mit der Auslegung der Eigensteifigkeit des Zylindermantels 7 an die unterschiedlichsten Anforderungen angepaßt werden. Alle Stellscheiben 5 sind auf den Naben 2 drehbar gelagert und können mittels der Traverse 16 gleichsinnig bewegt werden. Die Rollen 4 sind in den Scheiben 19, 20 drehbar und radial verschiebbar gelagert.Figure 4 shows a longitudinal section through the embodiment of Figure 1, it is particularly important to make it clear that the variable diameter support for the cylinder jacket 7 or the elastically clamped cylinder lift 8 in the axial direction of the sheet guide drum not only at the end, but depending on Need more than two can be provided. In this way, the axial distance between the rollers 4 - within construction predetermined limits - can be varied as required and adapted to the most varied of requirements in conjunction with the design of the inherent rigidity of the cylinder jacket 7. All adjusting discs 5 are rotatably mounted on the hubs 2 and can be moved in the same direction by means of the cross member 16. The rollers 4 are rotatably and radially displaceably mounted in the disks 19, 20.

Für die Lagerung der Greiferwelle 12 bzw. der Greifer 11 sind in üblicher Weise Naben 25 mit einstückig angeformten Flanschen 13 vorgesehen, wobei eine dieser Naben 25 einen zweiten Flansch 14 aufweist, an dem sich die (nur angedeutete) Stellschraube 15 zur Verstellung der Traverse 16 abstützt. Auch die Naben 25 sind durch Kerbstifte 18 oder dergleichen mit der Welle 1 drehfest verbunden.For the mounting of the gripper shaft 12 or the gripper 11, hubs 25 with integrally molded flanges 13 are provided in the usual way, one of these hubs 25 having a second flange 14 on which the (only indicated) adjusting screw 15 for adjusting the cross member 16 supports. The hubs 25 are also non-rotatably connected to the shaft 1 by grooved pins 18 or the like.

Bei der Variante gemäß Figur 5 sind statt Rollen 4 Gleitstifte 26 vorgesehen, die sich innenseitig auf den rampenartigen Widerlagern 6 der Stellscheibe 5 abstützen und außenseitig als Auflage für den Zylindermantel 7 dienen. Die Gleitstifte 26 sind radial verschieblich in einem als Ring ausgebildeten Führungselement 3 gelagert, der selbst mit der Welle 1 der Bogenführungstrommel drehfest verbunden ist. Die Durchmesseränderung wird wie bei den Rollen 4 durch Verdrehen der Stellscheibe 5 relativ zum Ring 26 bewirkt.In the variant according to FIG. 5, instead of rollers 4, sliding pins 26 are provided which are supported on the inside on the ramp-like abutments 6 of the adjusting disk 5 and serve on the outside as a support for the cylinder jacket 7. The sliding pins 26 are radially displaceably mounted in a guide element 3 designed as a ring, which is itself connected to the shaft 1 of the sheet guide drum in a rotationally fixed manner. As with the rollers 4, the change in diameter is effected by rotating the adjusting disc 5 relative to the ring 26.

Bei der Ausführungsform gemäß Figur 6 bestehen die Tragelemente aus Nocken 27, die in einem Führungselemente 3 drehbar gelagert sind. Mit einem hebelartigen Ansatz 28 greifen die Nocken 17 in eine Stellscheibe 29 ein, die randseitige Aussparungen 30 aufweist und relativ zum Führungselement 3 drehbar ist. Die äußere Kontur der Nocken 27 ist so gewählt, daß bei einer Drehung der Stellscheibe 29 und der damit verursachten Drehung der Nocken 26 um ihre Lagerachse eine stetige Veränderung des Abstandes der Auflagefläche für den Zylindermantel 7 am Nocken 26 vom Mittelpunkt der Bogenführungstrommel und damit die gewünschte Durchmesseränderung bewirkt wird.In the embodiment according to FIG. 6, the support elements consist of cams 27 which are rotatably mounted in a guide element 3. With a lever-like extension 28, the cams 17 engage in an adjusting disc 29 which has cutouts 30 on the edge and can be rotated relative to the guide element 3. The outer contour of the cams 27 is selected such that, when the adjusting disk 29 rotates and the cams 26 are rotated about its bearing axis, a constant change in the distance between the bearing surface for the cylinder jacket 7 on the cam 26 from the center of the sheet guide drum and thus the desired change in diameter is effected.

Claims (12)

Bogenführungstrommel für Rotationsdruckmaschinen, deren Außendurchmesser mittels eines federnd eingespannten Zylinderaufzugs und radial verstellbarer Tragelemente veränderbar ist, dadurch gekennzeichnet, daß zwischen Zylinderaufzug (8) und Tragelementen (4, 26) ein elastisch verformbarer Zylindermantel (7) vorgesehen ist, daß die Tragelemente (4, 26) in einem fest mit der Bogenführungstrommel verbundenen Führungselement (3) radial verschiebbar gelagert sind, und daß die Tragelemente (4, 26) außenseitig am Zylindermantel (7) anliegen und sich innenseitig auf Widerlagern (6) einer Stellscheibe (5) abstützen, deren wirksamer radialer Abstand von der Welle (1) durch Drehen der Stellscheibe (5) relativ zur Welle (1) stetig veränderbar ist.Sheet guide drum for rotary printing presses, the outside diameter of which can be changed by means of a spring-loaded cylinder lift and radially adjustable support elements, characterized in that an elastically deformable cylinder jacket (7) is provided between the cylinder lift (8) and support elements (4, 26), that the support elements (4, 26) are radially displaceably mounted in a guide element (3) firmly connected to the sheet guide drum, and that the support elements (4, 26) rest on the outside of the cylinder jacket (7) and are supported on the inside on abutments (6) of an adjusting disc (5), the effective radial distance from the shaft (1) can be changed continuously by rotating the adjusting disc (5) relative to the shaft (1). Bogenführungstrommel nach Anspruch 1, dadurch gekennzeichnet, daß die Stellscheibe (5) zur Bildung rampenartiger Widerlager (6) eine sägezahnartige Außenkontur aufweist, wobei jedem Tragelement (4, 26) ein Widerlager (6) zugeordnet ist, dessen radialer Abstand von der Welle (1) sich in Umfangsrichtung stetig, vorzugsweise spiralförmig, ändert.Sheet guide drum according to claim 1, characterized in that the adjusting disc (5) for forming ramp-like abutments (6) has a sawtooth-like outer contour, each support element (4, 26) being assigned an abutment (6) whose radial distance from the shaft (1 ) changes continuously, preferably spirally, in the circumferential direction. Bogenführungstrommel nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Tragelemente aus Rollen (4) bestehen, die in einem aus Scheiben (19, 20) aufgebauten Führungselement (3) drehbar gelagert sind.Sheet guide drum according to claim 1 or 2, characterized in that the supporting elements consist of rollers (4) which are rotatably mounted in a guide element (3) constructed from disks (19, 20). Bogenführungstrommel nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Tragelemente aus Gleitstiften (26) bestehen, die in einem als Ring ausgebildeten Führungselement (3) radial verschieblich gelagert sind.Sheet guide drum according to claim 1 or 2, characterized in that the supporting elements consist of sliding pins (26) exist which are radially displaceably mounted in a guide element (3) designed as a ring. Bogenführungstrommel für Rotationsdruckmaschinen, deren Außendurchmesser mittels eines federnd eingespannten Zylinderaufzugs und radial verstellbarer Tragelemente veränderbar ist, dadurch gekennzeichnet, daß zwischen Zylinderaufzug (8) und Tragelementen (27) ein elastisch verformbarer Zylindermantel (7) vorgesehen ist, daß die radial verstellbaren, außenseitig eine Auflage für den Zylindermantel (7) bildenden Tragelemente aus Nocken (27) bestehen, die um zur Welle (1) der Bogenführungstrommel parallele Achsen drehbar in einem fest mit der Welle (1) verbundenen Führungselement gelagert sind, und daß die Nocken (27) innenseitig einen hebelartigen Ansatz (28) aufweisen, der in Aussparungen (30) einer Stellscheibe (29) eingreift, die relativ zur Welle (1) drehbar ist.Sheet guiding drum for rotary printing presses, the outside diameter of which can be changed by means of a spring-loaded cylinder lift and radially adjustable support elements, characterized in that an elastically deformable cylinder jacket (7) is provided between the cylinder lift (8) and support elements (27), so that the radially adjustable, outside support for the cylinder jacket (7) forming support elements consist of cams (27) which are rotatably mounted about axes parallel to the shaft (1) of the sheet guide drum in a guide element which is fixedly connected to the shaft (1), and that the cams (27) have an inside have lever-like extension (28) which engages in recesses (30) of an adjusting disc (29) which can be rotated relative to the shaft (1). Bogenführungstrommel nach Anspruch 5, dadurch gekennzeichnet, daß die Nocken (27) außenseitig eine Kontur aufweisen, die bei einer Drehung der Nocken (27) eine stetige Veränderung des radialen Abstandes des Zylindermantels (7) von der Welle (1) bewirkt.Sheet guide drum according to Claim 5, characterized in that the cams (27) have a contour on the outside which, when the cams (27) rotate, causes a constant change in the radial distance of the cylinder jacket (7) from the shaft (1). Bogenführungstrommel nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Stellscheibe (5, 29) auf der Welle (1) der Bogenführungstrommel drehbar gelagert ist und daß sie mittels einer Stellschraube (15) relativ zur Welle (1) verdrehbar ist.Sheet guide drum according to one of claims 1 to 6, characterized in that the adjusting disc (5, 29) is rotatably mounted on the shaft (1) of the sheet guide drum and that it can be rotated relative to the shaft (1) by means of an adjusting screw (15). Bogenführungstrommel nach Anspruch 7, dadurch gekennzeichnet, daß zwei endseitig angeordnete Führungselemente (3) und zwei zugehörige Stellscheiben (5) vorgesehen sind.Sheet guide drum according to Claim 7, characterized in that two guide elements (3) arranged at the end and two associated adjusting disks (5) are provided. Bogenführungstrommel nach Anspruch 8, dadurch gekennzeichnet, daß zwischen den endseitig angeordneten Führungselementen (3) und Stellscheiben (5) wenigstens ein weiteres Führungselement (3) und wenigstens eine weitere Stellscheibe (5) angeordnet ist.Sheet guide drum according to Claim 8, characterized in that at least one further guide element (3) and at least one further adjusting disc (5) are arranged between the guide elements (3) and adjusting discs (5) arranged at the end. Bogenführungstrommel nach einem Ansprüche 8 oder 9, dadurch gekennzeichnet, daß nur eine Stellschraube (17) vorgesehen ist und daß die Stellscheiben (5) mittels einer Traverse (16) drehfest miteinander verbunden sind.Sheet guide drum according to one of claims 8 or 9, characterized in that only one adjusting screw (17) is provided and that the adjusting disks (5) are connected to one another in a rotationally fixed manner by means of a cross member (16). Bogenführungstrommel nach Anspruch 10, dadurch gekennzeichnet, daß die Führungselemente (3) eine in Umfangsrichtung verlaufende Aussparung (24) für die Traverse (16) aufweisen.Sheet guide drum according to claim 10, characterized in that the guide elements (3) have a circumferential recess (24) for the crossmember (16). Bogenführungstrommel nach Anspruch 3, dadurch gekennzeichnet, daß das aus Scheiben (19, 20) bestehende Führungselement (3) radiale Aussparungen (22) für die Lagerung der Rollen (4) aufweist.Sheet guide drum according to claim 3, characterized in that the guide element (3) consisting of disks (19, 20) has radial recesses (22) for the mounting of the rollers (4).
EP95113141A 1994-09-29 1995-08-22 Sheet guiding cylinder, with an adjustable outside diameter Expired - Lifetime EP0705690B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4434828 1994-09-29
DE4434828A DE4434828C1 (en) 1994-09-29 1994-09-29 Sheet guide drum with adjustable dia. for rotary printing machine

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EP0705690A1 true EP0705690A1 (en) 1996-04-10
EP0705690B1 EP0705690B1 (en) 1997-12-29

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AT (1) ATE161469T1 (en)
DE (2) DE4434828C1 (en)

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Publication number Priority date Publication date Assignee Title
CN101168318B (en) * 2006-10-23 2011-02-02 海德堡印刷机械股份公司 Drum for conveying a sheet
CN106183386A (en) * 2016-07-08 2016-12-07 江苏华宇印涂设备集团有限公司 Iron-printing machine
CN106183387A (en) * 2016-07-08 2016-12-07 江苏华宇印涂设备集团有限公司 Iron-printing machine
CN106183371A (en) * 2016-07-08 2016-12-07 江苏华宇印涂设备集团有限公司 Iron-printing machine plate cylinder

Families Citing this family (3)

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DE19611559A1 (en) * 1996-03-23 1997-09-25 Koenig & Bauer Albert Ag Sheet processing machine
DE19617021A1 (en) * 1996-04-27 1997-11-06 Heidelberger Druckmasch Ag Cylinder of a rotary printing press with a variable outside diameter
DE10324677B4 (en) * 2002-06-26 2017-02-16 Heidelberger Druckmaschinen Ag Cylinder of a printing material processing machine with a device for adjusting a diameter of the cylinder

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FR1016777A (en) * 1950-04-27 1952-11-21 Printing cylinder for printing presses
DE1125448B (en) * 1960-11-10 1962-03-15 Franz Heinz Adamaszek Blanket cylinder for rotary rubber printing machines
DE2946252A1 (en) 1979-11-16 1981-05-21 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Paper length alteration counteraction mechanism - has axially slotted printing cylinder expanded to increase diameter concentrically
DE3902923A1 (en) 1988-03-16 1989-10-05 Heidelberger Druckmasch Ag Sheet-conveying drum for sheet-fed rotary printing machines

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1016777A (en) * 1950-04-27 1952-11-21 Printing cylinder for printing presses
DE1125448B (en) * 1960-11-10 1962-03-15 Franz Heinz Adamaszek Blanket cylinder for rotary rubber printing machines
DE2946252A1 (en) 1979-11-16 1981-05-21 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Paper length alteration counteraction mechanism - has axially slotted printing cylinder expanded to increase diameter concentrically
DE3902923A1 (en) 1988-03-16 1989-10-05 Heidelberger Druckmasch Ag Sheet-conveying drum for sheet-fed rotary printing machines

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101168318B (en) * 2006-10-23 2011-02-02 海德堡印刷机械股份公司 Drum for conveying a sheet
CN106183386A (en) * 2016-07-08 2016-12-07 江苏华宇印涂设备集团有限公司 Iron-printing machine
CN106183387A (en) * 2016-07-08 2016-12-07 江苏华宇印涂设备集团有限公司 Iron-printing machine
CN106183371A (en) * 2016-07-08 2016-12-07 江苏华宇印涂设备集团有限公司 Iron-printing machine plate cylinder

Also Published As

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DE4434828C1 (en) 1995-11-16
DE59501159D1 (en) 1998-02-05
EP0705690B1 (en) 1997-12-29
ATE161469T1 (en) 1998-01-15

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