EP0203279B1 - Cylinder, preferably impression cylinder of a forme cylinder, the sleeve of which can be bent - Google Patents

Cylinder, preferably impression cylinder of a forme cylinder, the sleeve of which can be bent Download PDF

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Publication number
EP0203279B1
EP0203279B1 EP86102859A EP86102859A EP0203279B1 EP 0203279 B1 EP0203279 B1 EP 0203279B1 EP 86102859 A EP86102859 A EP 86102859A EP 86102859 A EP86102859 A EP 86102859A EP 0203279 B1 EP0203279 B1 EP 0203279B1
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EP
European Patent Office
Prior art keywords
rings
roller
pressing bar
shaft
wedge surfaces
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EP86102859A
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German (de)
French (fr)
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EP0203279A2 (en
EP0203279A3 (en
Inventor
Herbert Lübke
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Windmoeller and Hoelscher KG
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Windmoeller and Hoelscher KG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/08—Cylinders
    • B41F13/18—Impression cylinders

Definitions

  • the invention relates to a roller, preferably a counter-pressure roller of a rotogravure plate cylinder, with a roller jacket which is freely rotatable by means of a plurality of roller bearings arranged at a distance from one another via rings on a fixed axis, of which at least the middle ones are radially displaceable for bending or tensioning of the roller jacket.
  • the starting point of the invention is therefore the knowledge that a perfect print image generated by a rotogravure printing machine can be achieved if, in order to compensate for the pressure forces exerted by the rotogravure form cylinder, which tend to deflect or deform the impression roller, the impression roller is bent in the opposite direction accordingly, so that this bears under the pressure of the gravure forme cylinder on this with a rectilinear or correspondingly complementary curved surface line.
  • roller of the type specified is known, in which the roller shell is mounted on roller bearings on a hollow axis which can be deflected by eccentric tie rods arranged in the interior thereof.
  • roller shell is mounted on leaf spring assemblies which form rings and are supported on the axle and which can be braced in opposite directions for deflection.
  • a roller is known, the freely rotatable roller shell of which is supported on bearing elements with pockets which generate hydrostatic bearing on a rigid axis, the bearing elements being provided with cylinder bores into which piston-like pins connected to the axis engage , via which the cylinders and the pockets serving the hydrostatic bearing are supplied with pressure medium.
  • the bearing elements being provided with cylinder bores into which piston-like pins connected to the axis engage , via which the cylinders and the pockets serving the hydrostatic bearing are supplied with pressure medium.
  • the tilt-proof mounting of the roller shell associated with difficulties, the supply and discharge of the pressure medium to the bearing elements and their control by the pressure medium is also problematic.
  • US-A-4 421 283 shows a drum for rewinding metal strips.
  • the crown surface of the winding drum can be adjusted.
  • the drum has a central axis and a jacket surrounding it.
  • the jacket can be widened by means of a pressure rod guided in the axis in that inclined surfaces provided on this pressure rod run onto inclined surfaces on the jacket side.
  • This allows the drum shell to be changed in its scope.
  • this previously known drum shell does not have a continuously rotating surface. Rather, it is composed of several parts, some of which can be pivoted outwards.
  • a roller with the generic features is known as an spreader roller, for example from DE-A 2 102 818.
  • DE-A 2 127 853 which shows a roller with variable crowning, also includes the generic features.
  • the central axis is radially curved or bent, with its curvature gradually increasing towards the center.
  • several eccentric bushes are attached, the eccentricity of which also gradually increases towards the center of the central shaft.
  • These sleeves are rotatably inserted in sleeves, which in turn are enclosed by a rubber jacket.
  • the object of the invention is to provide a roller of the type specified at the outset, which, in the case of great bending rigidity, enables targeted bending or tensioning of the roller shell in a simple manner.
  • this object is achieved in that the rings bearing the roller bearings are mounted with play on the axle, the game being formed by a gap between the side of the axle opposite the push rod and the rings, that the axle is provided with an axially extending groove is in which a push rod is axially displaceably guided, which is provided in the region of the rings with wedge surfaces supported on the inner sides thereof, and in that a device is provided for axially displacing the push rod relative to the axis.
  • the roller according to the invention has an axis, which can consist of a solid profile, so that it matches the desired one Flexural rigidity can be established.
  • the roll shell can be deformed or braced with the desired bending line without the axis also having to be bent accordingly. Since the roller according to the invention is thus able to absorb considerable compressive stresses, it is particularly suitable as a counter-pressure roller for a gravure cylinder.
  • the rings in the area of the push rod are expediently provided with wedge surfaces which are bevelled in opposite directions to the wedge surfaces.
  • the rings can delimit a sickle-shaped gap in the area of their side opposite the push rod with the axis.
  • they can be fixed on the axle by these stop rings which surround on both sides.
  • the groove is expediently undercut in the form of a dovetail, the pressure rod having a corresponding trapezoidal cross-sectional profile, so that the pressure rod is also fixed in the groove and cannot deform with an undesirable bending line.
  • the slopes of the wedge surfaces of the pressure rod can increase from ring to ring to the middle of the roll.
  • two push rods are arranged in mirror image in the groove, which include a gap between them in the area of the roll means and rest with their end wedge surfaces on a common middle ring with oppositely beveled wedge surfaces.
  • each push rod can be firmly connected to a ring provided with an external thread, onto which a worm wheel provided with a corresponding internal thread is screwed, with which a worm mounted on the frame and provided with a handwheel meshes.
  • a worm wheel provided with a corresponding internal thread
  • a handwheel meshes
  • the axis 2 of the roller 1 is rotatably supported in the frame 3 of a rotogravure printing machine.
  • the journal 4 are provided with rings 5 with a spherical outer surface, which are held in rings 6 with a complementary inner surface, so that the axis 2 can bend without transferring corresponding bending moments to the machine frame.
  • the outer, the axles 4 holding rings 8 are supported on the machine frame 3 via pressure cells 9, so that the bearing reactions can be measured.
  • the axis 2 is provided with an axially extending groove 10, whose two flanks are undercut in a dovetail shape, as can be seen from FIG. 2.
  • two pressure rods 11, 12 are guided, which end at a distance from one another in the region of the center of the roll, that is to say include a gap 12 between them.
  • roller jacket 18 is mounted on the axis 2 via roller bearings 13, 14, 15, 16, 17. This consists of two superimposed concentric pipe sections.
  • the end bearings 13, 17 are mounted in the usual way via their inner rings directly on the axis 2, which is possible in that the push rods 11, 12 are completely sunk in the groove 10 in the area of these bearings.
  • the inner rings of the bearings 13, 17 are directly axially fixed on the axis 2.
  • the outer rings of the bearings 13, 17 are fixed in the rings 21, 22 with a conical outer surface. These rings are overlapped by rings 23, 24 with a correspondingly complementary conical inner surface, so that the inner casing tube 20 can be rotated by tightening the rings 21, 23 and 22, 24 by screw connections, not shown, but axially immovable via the roller bearings 13, 17 with the Axis 2 is connected.
  • the bearings 14, 15, 16 are mounted on the axis 2 via the rings 25, 26 and 27.
  • the rings 25, 26, 27 are fixed immovably in the axial direction between the stop rings 28, 29 fixedly connected to the axis 2.
  • the inner rings of the bearings 14, 15, 16 are fixed in the usual way on the rings 25, 26, 27 by means of clamping pieces and clamping rings.
  • the pressure rods 11, 12 have wedge-shaped inclined surfaces 33, 34 in the area of the rings 25, 26, 27. These act with correspondingly beveled wedge surfaces of the rings 25, 26, 27 together.
  • the inclined surfaces 34 are arranged with the same, but opposite, slope at the ends of the middle ring 37 and have a greater slope than the wedge surfaces 33.
  • the push rods 11, 12 are firmly connected at the end to the rings 36, 37 by means of axially extending screws.
  • the rings 36, 37 are provided with external threads onto which the internal thread of the worm wheel 38, 39 designed as a nut is screwed.
  • the worms 40, 41 With the worm threads of the worm wheels 38, 39, the worms 40, 41, which are mounted in the housing rings 42, 43, mesh with the frame.
  • the screws 40, 41 are provided with handles, not shown, by their actuation the push rods 11, 12 can be displaced in the axial direction.
  • the roller jacket 18 can be bent by radial displacement of the roller bearings 14, 15, 16.
  • the rings 25, 26, 27 carrying the roller bearings 14, 15, 16 form on their sides opposite the pressure rods 11, 12 with the axis 2 approximately sickle-shaped gaps 45, as is particularly clear for the ring 25 from FIG. 2.
  • the roller bearings 25, 26, 27 can thereby be adjusted by axially displacing the push rods 11, 12 with their rings relative to the axis 2 in the radial direction, so that the roller shell is bent or tensioned in the desired manner by this adjustment.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Rotary Presses (AREA)

Description

Die Erfindung betrifft eine Walze, vorzugsweise Gegendruckwalze eines Tiefdruckformzylinders, mit einem durch mehrere im Abstand voneinander angeordnete Wälzlager über Ringe auf einer feststehenden Achse frei drehbar gelagerten Walzenmantel, von denen zur Durchbiegung oder Verspannung des Walzenmantels mindestens die mittleren radial verschieblich sind.The invention relates to a roller, preferably a counter-pressure roller of a rotogravure plate cylinder, with a roller jacket which is freely rotatable by means of a plurality of roller bearings arranged at a distance from one another via rings on a fixed axis, of which at least the middle ones are radially displaceable for bending or tensioning of the roller jacket.

Häufig besteht das Bedürfnis, eine Walze durchzubiegen, damit sie auf eine sich auf dieser längs einer Mantellinie abstützenden Gegenwalze, die gegensinnig durchgebogen ist oder diese durchzubiegen trachtet, einen entsprechenden, die Durchbiegung aufhebenden oder die eigene Durchbiegung verhindernden Gegendruck ausübt. Beispielsweise stützt sich der Tiefdruckformzylinder einer Tiefdruckrotationsdruckmaschine mit erheblicher Spannung auf die Gegendruckwalze (Presseur) ab, so daß diese wegen ihrer geringeren Biegesteifigkeit durchgebogen wird und infolge dieser Durchbiegung ein einwandfreies Druckbild nicht mehr erreichbar ist.There is often a need to bend a roller so that it bends on a counter-roller which is supported on this along a surface line and which is bent in the opposite direction or which is trying to bend it counteracting or preventing the own deflection. For example, the rotogravure form cylinder of a rotogravure printing press is supported with considerable tension on the impression roller (impression roller), so that it is deflected because of its lower bending stiffness and because of this deflection, a perfect print image can no longer be achieved.

Ausgangspunkt der Erfindung ist daher de Erkenntnis, daß sich ein einwandfreies, von einer Tiefdruckrotationsmaschine erzeugtes Druckbild dann erreichen läßt, wenn zur Kompensation der von dem Tiefdruckformzylinder ausgeübten Druckkräfte, die die Gegendruckwalze durchzubiegen oder zu verformen trachten, die Gegendruckwalze entsprechend gegensinnig durchgebogen wird, so daß diese unter dem Druck des Tiefdruckformzylinders an diesem mit geradlinig oder entsprechend komplementär gekrümmter Mantellinie anliegt.The starting point of the invention is therefore the knowledge that a perfect print image generated by a rotogravure printing machine can be achieved if, in order to compensate for the pressure forces exerted by the rotogravure form cylinder, which tend to deflect or deform the impression roller, the impression roller is bent in the opposite direction accordingly, so that this bears under the pressure of the gravure forme cylinder on this with a rectilinear or correspondingly complementary curved surface line.

Aus der DE-C-15 11 224 ist eine Walze der eingangs angegebenen Art bekannt, bei der der Walzenmantel über Wälzlager auf einer hohlen Achse gelagert ist, die durch in deren Innerem angeordnete exzentrische Zugstangen durchbiegbar ist.From DE-C-15 11 224 a roller of the type specified is known, in which the roller shell is mounted on roller bearings on a hollow axis which can be deflected by eccentric tie rods arranged in the interior thereof.

Bei einer anderen aus der DE-A-22 57 947 bekannten Walze der eingangs angegebenen Art ist der Walzenmantel über von Ringen getragenen Wälzlagern auf die Achse bildenden Blattfederpaketen gelagert, die zur Durchbiegung gegensinnig verspannbar sind.In another known from DE-A-22 57 947 roller of the type mentioned above, the roller shell is mounted on leaf spring assemblies which form rings and are supported on the axle and which can be braced in opposite directions for deflection.

Da bei diesen bekannten Walzen eine Verformung des Walzenmantels durch Durchbiegung der aus einem Rohr oder einem Blattfederpaket bestehenden Achse erreicht wird, läßt sich eine gewünschte Biegelinie nur schwierig erzeugen. Weiterhin weisen die Walzen wegen ihrer weitgehend federnd ausgebildeten Achsen nur eine geringe Biegesteifigkeit auf, so daß sie nicht einsetzbar sind, wenn diese höhere Druckspannungen auf eine Gegenwalze ausüben sollen.Since in these known rolls a deformation of the roll shell is achieved by bending the axis consisting of a tube or a leaf spring assembly, a desired bending line can be generated only with difficulty. Furthermore, because of their largely resilient axes, the rollers have only a low bending stiffness, so that they cannot be used. if they are to exert higher compressive stresses on a counter roller.

Aus der DE-A-20 33 515 ist bekannt, eine Walze dadurch durchzubiegen, daß auf deren über die Lager hinaus verlängerten Achszapfen Querkräfte ausgeübt werden.From DE-A-20 33 515 it is known to bend a roller in that transverse forces are exerted on its journal extending beyond the bearings.

Aus der DE-C-29 42 002 ist eine Walze bekannt, deren frei drehbarer Walzenmantel sich über Lagerelemente mit eine hydrostatische Lagerung erzeugenden Taschen auf einer starren Achse abstützt, wobei die Lagerelemente mit Zylinderbohrungen versehen sind, in die mit der Achse verbundene kolbenartige Zapfen eingreifen, über die die Zylinder und die der hydrostatischen Lagerung dienenden Taschen mit Druckmittel versorgt werden. Bei dieser bekannten Walze ist nicht nur die kippsichere Lagerung des Walzenmantels mit Schwierigkeiten verbunden, die Zu- und Abführung des Druckmittels zu den Lagerelementen und deren Steuerung durch das Druckmittel ist ebenfalls problematisch.From DE-C-29 42 002 a roller is known, the freely rotatable roller shell of which is supported on bearing elements with pockets which generate hydrostatic bearing on a rigid axis, the bearing elements being provided with cylinder bores into which piston-like pins connected to the axis engage , via which the cylinders and the pockets serving the hydrostatic bearing are supplied with pressure medium. In this known roller, not only is the tilt-proof mounting of the roller shell associated with difficulties, the supply and discharge of the pressure medium to the bearing elements and their control by the pressure medium is also problematic.

Die US-A-4 421 283 zeigt eine Trommel zum Wiederaufwickeln von Metallbändern. Die Oberfläche der Wickeltrommel kann in ihrer Balligkeit verstellt werden. Dazu weist die Trommel eine zentrale Achse und einen diese umgebenden Mantel auf. Der Mantel kann über eine in der Achse geführte Druckstange dadurch aufgeweitet werden, daß Schrägflächen, die an dieser Druckstange vorgesehen sind, auf mantelseitige Schrägflächen auflaufen. Hierdurch kann der Trommelmantel in seinem Umfang verändert werden. Dieser vorbekannte Trommelmantel weist jedoch keine stetig umlaufende Oberfläche auf. Vielmehr ist er aus mehreren Teilen, die teilweise nach außen schwenkbar sind, zusammengesetzt.US-A-4 421 283 shows a drum for rewinding metal strips. The crown surface of the winding drum can be adjusted. For this purpose, the drum has a central axis and a jacket surrounding it. The jacket can be widened by means of a pressure rod guided in the axis in that inclined surfaces provided on this pressure rod run onto inclined surfaces on the jacket side. This allows the drum shell to be changed in its scope. However, this previously known drum shell does not have a continuously rotating surface. Rather, it is composed of several parts, some of which can be pivoted outwards.

Eine Walze mit den gattungsgemäßen Merkmalen ist als Breitstreckwalze beispielsweise aus der DE-A 2 102 818 bekannt. Auch die DE-A 2 127 853, die eine Walze mit veränderlicher Balligkeit zeigt, umfaßt die gattungsgemäßen Merkmale. Bei dieser Walze ist die zentrale Achse radial gekrümmt bzw. durchgebogen, wobei ihre Krümmung zur Mitte hin allmählich zunimmt. Auf dieser Achse sind mehrere Exzenterbüchsen aufgesetzt, deren Exzentrizität ebenfalls zur Mitte der zentralen Welle hin allmählich zunimmt. Diese Büchsen sind jeweils in Hülsen drehbar eingesetzt, die wiederum von einem Gummimantel umschlossen sind.A roller with the generic features is known as an spreader roller, for example from DE-A 2 102 818. DE-A 2 127 853, which shows a roller with variable crowning, also includes the generic features. In this roller, the central axis is radially curved or bent, with its curvature gradually increasing towards the center. Are on this axis several eccentric bushes are attached, the eccentricity of which also gradually increases towards the center of the central shaft. These sleeves are rotatably inserted in sleeves, which in turn are enclosed by a rubber jacket.

Aufgabe der Erfindung ist es, eine Walze der eingangs angegebenen Art zu schaffen, die bei großer Biegesteifigkeit auf einfache Weise eine gezielte Durchbiegung oder Verspannung des Walzenmantels ermöglicht.The object of the invention is to provide a roller of the type specified at the outset, which, in the case of great bending rigidity, enables targeted bending or tensioning of the roller shell in a simple manner.

Erfindungsgemäß wird diese Aufgabe dadurch gelöst, daß die die Wälzlager tragenden Ringe mit Spiel auf der Achse gelagert sind, wobei das Spiel durch einen Spalt zwischen der der Druckstange gegenüberliegenden Seite der Achse und dem Ringen gebildet wird, daß die Achse mit einer axial verlaufenden Nut versehen ist, in der eine Druckstange axial verschieblich geführt ist, die im Bereich der Ringe mit sich auf deren Innenseiten abstützenden Keilflächen versehen ist, und daß eine Einrichtung zum axialen Verschieben der Druckstange relativ zur Achse vorgesehen ist.According to the invention, this object is achieved in that the rings bearing the roller bearings are mounted with play on the axle, the game being formed by a gap between the side of the axle opposite the push rod and the rings, that the axle is provided with an axially extending groove is in which a push rod is axially displaceably guided, which is provided in the region of the rings with wedge surfaces supported on the inner sides thereof, and in that a device is provided for axially displacing the push rod relative to the axis.

Die erfindungsgemäße Walze weist eine Achse auf, die aus einem Vollprofil bestehen kann, so daß sich diese mit der gewünschten Biegesteifigkeit herstellen läßt.The roller according to the invention has an axis, which can consist of a solid profile, so that it matches the desired one Flexural rigidity can be established.

Durch entsprechende Verschiebung der Druckstange läßt sich der Walzenmantel mit gewünschter Biegelinie verformen oder verspannen, ohne daß auch die Achse entsprechend durchgebogen werden muß. Da somit die erfindungsgemäße Walze erhebliche Druckspannungen aufzunehmen vermag, eignet sie sich insbesondere als Gegendruckwalze für einen Tiefdruckformzylinder.By appropriate displacement of the push rod, the roll shell can be deformed or braced with the desired bending line without the axis also having to be bent accordingly. Since the roller according to the invention is thus able to absorb considerable compressive stresses, it is particularly suitable as a counter-pressure roller for a gravure cylinder.

Zweckmäßigerweise sind die Ringe im Bereich der Druckstange mit zu den Keilflächen gegensinnig abgeschrägten Keilflächen versehen. Um in einfacher und gezielter Weise eine radiale Verstellung der Wälzlager über die diese tragenden Ringe zu erreichen, können die Ringe im Bereich ihrer der Druckstange gegenüberliegenden Seite mit der Achse einen sichelförmigen Spalt begrenzen. Um ein axiales Auswandern der Ringe zu verhindern, können diese durch diese beidseits einfassende Anschlagringe auf der Achse festgelegt sein.The rings in the area of the push rod are expediently provided with wedge surfaces which are bevelled in opposite directions to the wedge surfaces. In order to achieve a radial and simple adjustment of the rolling bearings via the rings carrying them, the rings can delimit a sickle-shaped gap in the area of their side opposite the push rod with the axis. In order to prevent the rings from migrating axially, they can be fixed on the axle by these stop rings which surround on both sides.

Zweckmäßigerweise ist die Nut schwalbenschwanzförmig hinterschnitten, wobei die Druckstange ein entsprechendes trapezförmiges Querschnittsprofil aufweist, so daß auch die Druckstange in der Nut festgelegt ist und sich nicht mit unerwünschter Biegelinie verformen kann.The groove is expediently undercut in the form of a dovetail, the pressure rod having a corresponding trapezoidal cross-sectional profile, so that the pressure rod is also fixed in the groove and cannot deform with an undesirable bending line.

Da üblicherweise eine ballige Biegelinie des Walzenmantels gewünscht wird, können die Steigungen der Keilflächen der Druckstange von Ring zu Ring bis zur Walzenmitte zunehmen.Since a crowned bending line of the roll shell is usually desired, the slopes of the wedge surfaces of the pressure rod can increase from ring to ring to the middle of the roll.

Um die gewünschte ballige Durchbiegung des Walzenmantels zu erreichen, sind in weiterer Ausgestaltung der Erfindung in der Nut spiegelbildlich zwei Druckstange angeordnet, die im Bereich der Walzenmittel einen Spalt zwischen sich einschließen und mit ihren endseitigen Keilflächen an einem gemeinsamen mittleren Ring mit gegensinnig abgeschrägten Keilflächen anliegen.In order to achieve the desired spherical deflection of the roll shell, in a further embodiment of the invention two push rods are arranged in mirror image in the groove, which include a gap between them in the area of the roll means and rest with their end wedge surfaces on a common middle ring with oppositely beveled wedge surfaces.

Zum Bilden der Einrichtung zum axialen Verstellen der Druckstange kann jede Druckstange mit einem mit einem Außengewinde versehenen Ring fest verbunden sein, auf den ein mit einem entsprechenden Innengewinde versehenes Schneckenrad aufgeschraubt ist, mit dem eine gestellfest gelagerte und mit einem Handrad versehene Schnecke kämmt. Durch Drehen der Schnecke lassen sich eine oder beide Druckstangen axial zur Erzeugung der gewünschten Durchbiegung bzw. Spannung verstellen.To form the device for axially adjusting the push rod, each push rod can be firmly connected to a ring provided with an external thread, onto which a worm wheel provided with a corresponding internal thread is screwed, with which a worm mounted on the frame and provided with a handwheel meshes. By turning the screw, one or both push rods can be adjusted axially to produce the desired deflection or tension.

Ein Ausführungsbeispiel der Erfindung wird nachstehend anhand der Zeichnung näher beschrieben. In dieser zeigt

Fig. 1
einen Längsschnitt durch eine Gegendruckwalze für einen Tiefdruckformzylinder und
Fig. 2
einen Querschnitt durch die Walze längs der Linie II - II in Fig. 1.
An embodiment of the invention is described below with reference to the drawing. In this shows
Fig. 1
a longitudinal section through a counter-pressure roller for a gravure cylinder and
Fig. 2
a cross-section through the roller along the line II - II in Fig. 1st

Die Achse 2 der Walze 1 ist in dem Gestell 3 einer Tiefdruckrotationsmaschine undrehbar gelagert. Die Achszapfen 4 sind mit Ringen 5 mit kugeliger Außenfläche versehen, die in Ringen 6 mit komplementärer Innenfläche gehaltert sind, so daß sich die Achse 2 durchbiegen kann, ohne entsprechende Biegemomente auf das Maschinengestell zu übertragen. Die äußeren, die Achszapfen 4 halternden Ringe 8 sind über Druckmeßdosen 9 auf das Maschinengestell 3 abgestützt, so daß sich die Lagerreaktionen messen lassen.The axis 2 of the roller 1 is rotatably supported in the frame 3 of a rotogravure printing machine. The journal 4 are provided with rings 5 with a spherical outer surface, which are held in rings 6 with a complementary inner surface, so that the axis 2 can bend without transferring corresponding bending moments to the machine frame. The outer, the axles 4 holding rings 8 are supported on the machine frame 3 via pressure cells 9, so that the bearing reactions can be measured.

Die Achse 2 ist mit einer axial verlaufenden Nut 10 versehen, deren beiden Flanken schwalbenschwanzförmig hinterschnitten sind, wie aus Fig. 2 ersichtlich ist. In der Nut 10 sind zwei Druckstangen 11, 12 geführt, die im Bereich der Walzenmitte im Abstand voneinander enden, also einen Spalt 12 zwischen sich einschließen.The axis 2 is provided with an axially extending groove 10, whose two flanks are undercut in a dovetail shape, as can be seen from FIG. 2. In the groove 10, two pressure rods 11, 12 are guided, which end at a distance from one another in the region of the center of the roll, that is to say include a gap 12 between them.

Auf der Achse 2 ist über Wälzlager 13, 14, 15, 16, 17 der Walzenmantel 18 gelagert. Dieser besteht aus zwei übereinandergeschobenen konzentrischen Rohrstücken.The roller jacket 18 is mounted on the axis 2 via roller bearings 13, 14, 15, 16, 17. This consists of two superimposed concentric pipe sections.

Die endseitigen Lager 13, 17 sind in üblicher Weise über ihre Innenringe unmittelbar auf der Achse 2 gelagert, was dadurch möglich ist, daß im Bereich dieser Lager die Druckstangen 11, 12 völlig in der Nut 10 versenkt sind. Die Innenringe der Lager 13, 17 sind unmittelbar axial unverschieblich auf der Achse 2 festgelegt. Die Außenringe der Lager 13, 17 sind in den Ringen 21, 22 mit konischer Außenfläche festgelegt. Diese Ringe werden von Ringen 23, 24 mit entsprechend komplementärer konischer Innenmantelfläche übergriffen, so daß das innere Mantelrohr 20 durch Verspannen jeweils der Ringe 21, 23 und 22, 24 durch nicht dargestellte Verschraubungen drehbar, aber axial unverschieblich über die Wälzlager 13, 17 mit der Achse 2 verbunden ist.The end bearings 13, 17 are mounted in the usual way via their inner rings directly on the axis 2, which is possible in that the push rods 11, 12 are completely sunk in the groove 10 in the area of these bearings. The inner rings of the bearings 13, 17 are directly axially fixed on the axis 2. The outer rings of the bearings 13, 17 are fixed in the rings 21, 22 with a conical outer surface. These rings are overlapped by rings 23, 24 with a correspondingly complementary conical inner surface, so that the inner casing tube 20 can be rotated by tightening the rings 21, 23 and 22, 24 by screw connections, not shown, but axially immovable via the roller bearings 13, 17 with the Axis 2 is connected.

Die Lager 14, 15, 16 sind über die Ringe 25, 26 und 27 auf der Achse 2 gelagert. Die Ringe 25, 26, 27 sind zwischen den mit der Achse 2 fest verbundenen Anschlagringen 28, 29 in axialer Richtung unverschieblich festgelegt. Die Innenringe der Lager 14, 15, 16 sind durch Spannstücke und Spannringe in üblicher Weise auf den Ringen 25, 26, 27 festgelegt.The bearings 14, 15, 16 are mounted on the axis 2 via the rings 25, 26 and 27. The rings 25, 26, 27 are fixed immovably in the axial direction between the stop rings 28, 29 fixedly connected to the axis 2. The inner rings of the bearings 14, 15, 16 are fixed in the usual way on the rings 25, 26, 27 by means of clamping pieces and clamping rings.

Die Druckstangen 11, 12 weisen im Bereich der Ringe 25, 26, 27 keilförmige Schrägflächen 33, 34 auf. Diese wirken mit entsprechend gegensinnig abgeschrägten Keilflächen der Ringe 25, 26, 27 zusammen. Die Schrägflächen 34 sind mit gleicher, aber gegensinniger Steigung an den Enden des mittleren Rings 37 angeordnet und weisen eine größere Steigung als die Keilflächen 33 auf.The pressure rods 11, 12 have wedge-shaped inclined surfaces 33, 34 in the area of the rings 25, 26, 27. These act with correspondingly beveled wedge surfaces of the rings 25, 26, 27 together. The inclined surfaces 34 are arranged with the same, but opposite, slope at the ends of the middle ring 37 and have a greater slope than the wedge surfaces 33.

Die Druckstangen 11, 12 sind endseitig mit den Ringen 36, 37 durch axial verlaufende Schrauben fest verbunden. Die Ringe 36, 37 sind mit Außengewinden versehen, auf die das Innengewinde des als Mutter ausgebildeten Schneckenrades 38, 39 aufgeschraubt ist. Mit den Schneckengewinden der Schneckenräder 38, 39 kämmen die Schnecken 40, 41, die in den Gehäuseringen 42, 43 gestellfest gelagert sind. Endseitig sind die Schnecken 40, 41 mit nicht dargestellten Handgriffen versehen, durch deren Betätigung sich die Druckstangen 11, 12 in axialer Richtung verschieben lassen. Durch entsprechende Einstellung der Druckstangen läßt sich der Walzenmantel 18 durch Radialverschiebung der Wälzlager 14, 15, 16 durchbiegen.The push rods 11, 12 are firmly connected at the end to the rings 36, 37 by means of axially extending screws. The rings 36, 37 are provided with external threads onto which the internal thread of the worm wheel 38, 39 designed as a nut is screwed. With the worm threads of the worm wheels 38, 39, the worms 40, 41, which are mounted in the housing rings 42, 43, mesh with the frame. At the end, the screws 40, 41 are provided with handles, not shown, by their actuation the push rods 11, 12 can be displaced in the axial direction. By appropriate adjustment of the push rods, the roller jacket 18 can be bent by radial displacement of the roller bearings 14, 15, 16.

Die die Wälzlager 14, 15, 16 tragenden Ringe 25, 26, 27 bilden auf ihren den Druckstangen 11, 12 gegenüberliegenden Seiten mit der Achse 2 etwa sichelförmige Spalte 45, wie dies für den Ring 25 aus Fig. 2 besonders deutlich ist. Die Wälzlager 25, 26, 27 lassen sich dadurch durch axiale Verschiebung der Druckstangen 11, 12 mit ihren Ringen relativ zur Achse 2 in radialer Richtung verstellen, so daß durch diese Verstellung der Walzenmantel in der gewünschten Weise durchgebogen oder verspannt wird.The rings 25, 26, 27 carrying the roller bearings 14, 15, 16 form on their sides opposite the pressure rods 11, 12 with the axis 2 approximately sickle-shaped gaps 45, as is particularly clear for the ring 25 from FIG. 2. The roller bearings 25, 26, 27 can thereby be adjusted by axially displacing the push rods 11, 12 with their rings relative to the axis 2 in the radial direction, so that the roller shell is bent or tensioned in the desired manner by this adjustment.

Claims (8)

  1. A roller, preferably an impression roller of an intaglio plate cylinder, comprising a roller shell (18) which is freely rotatably mounted on a stationary shaft (2) by way of rings (25, 26, 27) by a plurality of spaced-apart rolling bearings (14, 15, 16), at least the central ones thereof being radially displaceable for flexing or bracing of the roller shell (18),
    characterized in that
    the shaft (2) is provided with an axially extending groove (10) in which a pressing bar (11, 12) is axially displaceably guided, the pressing bar being provided in the region of the rings (25, 26, 27) with wedge surfaces (33, 34) which bear against the insides of the rings,
    the rings (25, 26, 27) which bear the rolling bearings (14, 15, 16) are mounted with play on the shaft (2), wherein the play is formed by a gap (45) between the side of the shaft (2) which is in opposite relationship to the pressing bar (11, 12), and the rings (25, 26, 27), and
    there is provided a means (36-42) for axial displacement of the pressing bars (11, 12) relative to the shaft (2).
  2. A roller according to claim 1 characterised in that the rings (25, 26, 27) are provided in the region of the pressing bar (11, 12) with wedge surfaces which are inclined in opposite relationship to the wedge surfaces (33, 34).
  3. A roller according to claim 1 or claim 2 characterised in that the rings (25, 26, 27) define sickle-shaped gaps (45) with the shaft (2), in the region of the sides of the rings which are in opposite relationship to the pressing bar (11, 12).
  4. A roller according to one of claims 1 to 3 characterised in that the rings (25, 26, 27) are feed on the shaft (2) by stop rings (28, 29) which embrace the rings on both sides.
  5. A roller according to one of claims 1 to 4 characterised in that the groove (10) is undercut in a dovetail configuration and the pressing bar (11, 12) is of a corresponding trapezoidal cross-sectional profile.
  6. A roller according to one of claims 1 to 5 characterised in that the gradients of the wedge surfaces (33, 34) of the pressing bar (11, 12) increase from ring to ring towards the middle of the roller.
  7. A roller according to one of claims 1 to 6 characterised in that two pressing bars (11, 12) are arranged in the groove (10) in mirror image relationship, the pressing bars defining a gap (12) between them in the region of the middle of the roller and bearing with their end wedge surfaces (34) against a common middle ring (27) with wedge surfaces (34) which are inclined in opposite relationship.
  8. A roller according to one of claims 1 to 7 characterised in that to form the means for axial displacement of the pressing bar each pressing bar (11, 12) is fixedly connected to a ring ( 36, 37) which is provided with an external screwthread and on to which is screwed a worm wheel (38, 39) which is provided with a corresponding internal screwthread and with which there meshes a worm (40, 41) which is mounted in feed relationship with the frame and which is provided with a hand wheel.
EP86102859A 1985-05-28 1986-03-05 Cylinder, preferably impression cylinder of a forme cylinder, the sleeve of which can be bent Expired - Lifetime EP0203279B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3519084 1985-05-28
DE19853519084 DE3519084A1 (en) 1985-05-28 1985-05-28 ROLLER, PREFERABLY BACK PRESSURE ROLLER OF A LOW PRINT FORM CYLINDER, WITH BENDABLE ROLLER SHEATH

Publications (3)

Publication Number Publication Date
EP0203279A2 EP0203279A2 (en) 1986-12-03
EP0203279A3 EP0203279A3 (en) 1988-08-03
EP0203279B1 true EP0203279B1 (en) 1991-06-19

Family

ID=6271808

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86102859A Expired - Lifetime EP0203279B1 (en) 1985-05-28 1986-03-05 Cylinder, preferably impression cylinder of a forme cylinder, the sleeve of which can be bent

Country Status (3)

Country Link
US (1) US4685182A (en)
EP (1) EP0203279B1 (en)
DE (1) DE3519084A1 (en)

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Also Published As

Publication number Publication date
US4685182A (en) 1987-08-11
DE3519084C2 (en) 1989-05-18
EP0203279A2 (en) 1986-12-03
EP0203279A3 (en) 1988-08-03
DE3519084A1 (en) 1986-12-04

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