EP0404765A1 - Bearing arrangement for the impression cylinder of a printer. - Google Patents

Bearing arrangement for the impression cylinder of a printer.

Info

Publication number
EP0404765A1
EP0404765A1 EP88904486A EP88904486A EP0404765A1 EP 0404765 A1 EP0404765 A1 EP 0404765A1 EP 88904486 A EP88904486 A EP 88904486A EP 88904486 A EP88904486 A EP 88904486A EP 0404765 A1 EP0404765 A1 EP 0404765A1
Authority
EP
European Patent Office
Prior art keywords
bearing
bearing housing
roller
housing
pressure roller
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
EP88904486A
Other languages
German (de)
French (fr)
Other versions
EP0404765B1 (en
Inventor
Rainer Haus
Karl-Heinz Polzer
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.)
Wincor Nixdorf International GmbH
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Publication of EP0404765A1 publication Critical patent/EP0404765A1/en
Application granted granted Critical
Publication of EP0404765B1 publication Critical patent/EP0404765B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • B41F13/20—Supports for bearings or supports for forme, offset, or impression cylinders

Definitions

  • the invention relates to a bearing arrangement for a pressure roller for transporting recording media in a printing device according to the preamble of the main claim.
  • pairs of rollers arranged one after the other in the transport path are used as the means of transport, which consist of a driven transport roller and an idling pressure roller pressing against the transport roller with a given pressing force.
  • One of the two rollers, preferably the pressure roller is coated on its surface with an elastically deformable material in order to be able to absorb tolerances at a predetermined contact pressure and to record the recording medium passing between the pair of rollers uniformly.
  • the pair of rollers must be designed in such a way that the recording media are securely grasped and transported.
  • recording media with different material properties for example different types of paper with different paper weights, may also have to be safely processed. This is only possible if a predetermined radial contact pressure with which the pressure roller presses against the transport roller is effective as evenly as possible in the circumferential and axial directions.
  • roller pairs are often relatively inaccessible. You should therefore be mounted so that Repara tur or maintenance work are still easy to perform.
  • the pressure rollers which are sensitive due to their elastic surface, must be easy to replace and, if possible, without special tools, since maintenance work is carried out in the vast majority of cases by the user.
  • assembly and disassembly from one side, for example the front side of the pressure device must preferably be possible for both bearing points of the roller pairs arranged in wall parts of the printing device.
  • roller pairs are used in the course of a transport path in printing devices, so the storage of the roller pairs in the wall parts must be as simple as possible for reasons of cost, for a few
  • the two bearing points are therefore designed differently, in particular for the pressure roller.
  • One of the two bearing points forms a fixed bearing which clearly defines the pressure roller in the respective wall part in the axial direction.
  • the other bearing point is designed as a floating bearing in order to absorb tolerances caused by production but also by temperature influences during operation.
  • the main aim is to achieve high operational reliability in order to maintain acceptable maintenance intervals.
  • the present invention is therefore based on the object of creating a bearing arrangement of the type mentioned which, with the simplest possible construction with essentially the same construction parts, allows both the design as a floating and a fixed bearing, is easy to assemble and is insensitive to tolerances in radial, as well as the axial direction.
  • this object is achieved according to the invention with the features described in the characterizing part of the main claim.
  • An essential element of the solution according to the invention is a bearing housing which can be used in the same way for both the loose and the fixed bearing. This bearing housing receives similarly designed roller bearings in the axial direction, which in turn carry correspondingly fitted bearing journals of the pressure roller.
  • this bearing housing has securing elements which are designed in such a way that the bearing housing can be inserted into corresponding recesses in the wall parts of the printing device from one side and, in the assembled state of the pressure roller, keeps itself immovably in the axial direction .
  • the floating and fixed bearings of the pressure roller differ only in one element, namely a locking ring assigned to the fixed bearing.
  • the corresponding bearing journal of the pressure roller is thus axially fixed in the fixed bearing, whereas the corresponding bearing journal in the floating bearing is arranged to be displaceable in the axial direction.
  • FIG. 1 and 2 show a front view or a section through a bearing housing with an inserted ball bearing
  • FIG. 3 shows a further sectional illustration of the bearing housing in a position rotated by 45 ° with respect to the illustration in FIG. 2, 4 shows a schematic representation of a pair of rollers, consisting of transport roller and pressure roller, in particular with the two bearing points for the pressure roller and
  • FIG. 5 shows a front view of the fixed bearing of the pressure roller.
  • a bearing housing 1 is shown in a front view or in a section.
  • This bearing housing is designed as a plastic injection-molded part, which has a through hole 2.
  • a deep groove ball bearing 3 is inserted in this through hole from the front side visible in FIG. 1.
  • This has a collar 4, which is seated on the circumference of the outer surface of the bearing housing 1.
  • the deep groove ball bearing 3 is fixed in the position shown in FIG. 2 in the bearing housing 1 by latches 5 which project axially from the front side of the bearing housing 1, diametrically opposite one another.
  • These locking pawls 5 are designed to be elastic, so that inward-pointing lugs 6 of the locking pawls 5 dodge in radial direction when the deep groove ball bearing 3 is inserted and fall again as soon as the deep groove ball bearing rests with its collar 4 on the circumference of the bearing housing 1.
  • the latches 5 with their lugs 6 encompass the collar 5 of the deep groove ball bearing and fix it in the through bore 2 of the bearing housing 1 in the axial direction.
  • the bearing housing 1 is shown in a sectional view as an individual part. This section of FIG. 3 is rotated in its position relative to the illustration of FIG. 2 by 45 ° in order to be able to show both latches 5 better.
  • the bearing housing 1 has two mutually opposite, mutually parallel guide surfaces 7, ie the circumference of the bearing housing 1 is not rotationally symmetrical, but par allel to the sectional plane of FIG 2.
  • the configuration of a recess corresponding to the cross section of the bearing housing 1 in a wall part of the printing device, which receives the bearing housing is defined as a rectangular slot in which the bearing housing 1 is arranged to be radially displaceable.
  • two locking projections 8 and 9 protrude radially from the top and bottom of the bearing housing. These serve as securing elements for axially fixing the bearing housing 1 in the wall parts of the printing device. They are therefore offset from one another in the axial direction by the wall thickness of the wall parts.
  • FIG. 4 shows the overall arrangement of a pair of rollers, consisting of a driven transport roller 10 and a free-running pressure roller 11, is shown schematically.
  • FIG. 5 additionally shows a front view of the one bearing designed as a fixed bearing. In the present case, the design and storage of the transport roller 10 is of secondary importance, it is therefore not shown in detail. In contrast, the storage for the pressure roller 11 is carried out in detail.
  • the pressure roller 11 has two bearing journals 12 and 13.
  • One bearing journal 12 of the pressure roller 11 is assigned to the axial fixed bearing of the pressure roller 11.
  • This fixed bearing is seated in a schematically indicated first wall part 14 of the printing device, which laterally delimits the transport path for a recording medium, not shown.
  • the fixed bearing for the pressure roller 11 arranged in this wall part 14 is shown in the assembled state.
  • the wall part 14 has a slot-shaped recess 16.
  • This rectangular slot has a width that is slightly larger than the distance between the guide surfaces 7 of the bearing housing from each other. Its length in the direction of the connecting line between the axes of the transport roller 10 and the pressure roller 11 is dimensioned so that the bearing housing 1 including the locking lug 9 can be inserted into the recess 16 in the direction of an arrow 15.
  • the bearing pin 12 of the pressure roller 11 inserted into the bearing housing 1 rotates with the inner ring of the deep groove ball bearing 3.
  • the bearing journal is secured against axial displacement by a circlip 17 which rests on the outside of the inner ring of the deep groove ball bearing 3.
  • a tension spring 18 is provided, which applies the radial contact pressure with which the pressure roller 11 presses against the transport roller 10.
  • This tension spring 18 is suspended with its ends in receiving openings 19 which, for. B. 14 are provided on both sides of the bearing slot 16. The tension spring 18 is pulled over the outer surface of the bearing housing 1 under tension and thus presses the bearing housing 1 in the bearing slot 16 radially in the direction of the axis of the transport roller 10.
  • the arrangement of the floating bearing in a second wall part 20 is shown for illustration in the assembled state.
  • the bearing housing is pushed into the corresponding bearing slot 16 from the outside, ie again in the installation direction indicated by the arrow 15, until the latching projection 8 of the bearing housing 1 abuts the outer surface of the second wall part 20.
  • the inserted bearing housing 1 is raised slightly and thus engages with the latching lug 9 on the inner surface of the second wall part 20.
  • the bent shape of arrow 15 schematically represents this installation movement.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Mounting Of Bearings Or Others (AREA)
  • Support Of The Bearing (AREA)

Abstract

Le cylindre de pression (11) présentant une surface élastiquement déformable est monté entre des éléments latéraux (14 et 20) axialement et dans le sens radial au moyen de roulements (3) prévus dans deux supports, tout en prenant appui élastiquement, avec une force de tension prédéterminée, contre un cylindre transporteur (10). Sur chacun des deux supports, est monté de façon rigide l'un des roulements (3) dans un boîtier de palier (1) du même type, lesdits roulements présentant des éléments d'arrêt automatique (8, 9) pour la fixation axiale du boîtier de palier dans un évidement (16) prévu dans l'élément latéral correspondant (14 et 20). Sur l'un des supports précités (palier fixe), il est prévu une bague d'arrêt (17) assurant la fixation axiale d'un tourillon (12) du cylindre de pression dans le boîtier de palier. Sur l'autre support (palier libre), le tourillon correspondant (13) est entraîné en rotation avec un jeu radial. L'agencement de palier convient pour des paires de cylindres montées en tambour, de manière à constituer le parcours de transport d'un dispositif d'impression.The pressure cylinder (11) having an elastically deformable surface is mounted between side members (14 and 20) axially and radially by means of bearings (3) provided in two supports, while bearing elastically, with a force of predetermined tension, against a transport cylinder (10). On each of the two supports, is mounted rigidly one of the bearings (3) in a bearing housing (1) of the same type, said bearings having automatic stop elements (8, 9) for the axial fixing of the bearing housing in a recess (16) provided in the corresponding side member (14 and 20). On one of the aforementioned supports (fixed bearing), there is provided a stop ring (17) ensuring the axial fixing of a journal (12) of the pressure cylinder in the bearing housing. On the other support (free bearing), the corresponding journal (13) is rotated with radial play. The bearing arrangement is suitable for pairs of cylinders mounted in a drum, so as to constitute the transport path of a printing device.

Description

Lageranordnung für eine Andruckwalze einer Druckeinrichtung Bearing arrangement for a pressure roller of a printing device
Die Erfindung bezieht sich auf eine Lageranordnung für eine Andruckwalze zum Transportieren von Aufzeichnungsträgern in einer Druckeinrichtung gemäß dem Oberbegriff des Hauptanspruches.The invention relates to a bearing arrangement for a pressure roller for transporting recording media in a printing device according to the preamble of the main claim.
Um Aufzeichnungsträger, beispielsweise Einzelblätter in Druckeinrichtungen längs einer vorgegebenen Transportbahn zu bewegen, werden als Transportmittel häufig in der Transportbahn hintereinander angeordnete Walzenpaare benutzt, die aus einer angetriebenen Transportwalze und einer leerlaufenden, mit einer gegebenen Andruckkraft gegen die Transportwalze drückenden Andruckwalze bestehen. Eine der beiden Walzen, vorzugsweise die Andruckwalze, ist auf ihrer Oberfläche mit einem elastisch verformbaren Material beschichtet, um bei einer vorgegebenen Anpreßkraft Toleranzen auffangen zu können und den zwischen dem Walzenpaar durchlaufenden Aufzeichnungsträger gleichmäßig zu erfassen.In order to move recording media, for example single sheets in printing devices along a predetermined transport path, pairs of rollers arranged one after the other in the transport path are used as the means of transport, which consist of a driven transport roller and an idling pressure roller pressing against the transport roller with a given pressing force. One of the two rollers, preferably the pressure roller, is coated on its surface with an elastically deformable material in order to be able to absorb tolerances at a predetermined contact pressure and to record the recording medium passing between the pair of rollers uniformly.
Damit ist bereits eines der wesentlichen Probleme angeεprochen. Die Walzenpaarung muß so ausgestaltet sein, daß die Aufzeichnungsträger sicher erfaßt und transportiert werden, dabei müssen gegebenenfalls auch Aufzeichnungsträger mit unterschiedlichen Materialeigenschaften, beispielsweise unterschiedliche Papiersorten mit verschiedenen Papiergewichten sicher verarbeitbar sein. Dies ist nur möglich, wenn eine vorgegebene radiale Anpreßkraft, mit der die Andruckwalze gegen die Transportwalze drückt, möglichst gleichmäßig in Umfangs- und Achsenrichtung wirksam wird.This already addresses one of the essential problems. The pair of rollers must be designed in such a way that the recording media are securely grasped and transported. In this case, recording media with different material properties, for example different types of paper with different paper weights, may also have to be safely processed. This is only possible if a predetermined radial contact pressure with which the pressure roller presses against the transport roller is effective as evenly as possible in the circumferential and axial directions.
Die Walzenpaare sind oft relativ unzugänglich angeordnet. Sie sollen deshalb möglichst so montiert sein, daß Repara tur- oder Wartungsarbeiten dennoch leicht durchzuführen sind. So müssen beispielsweise die wegen ihrer elastischen Oberfläche empfindlichen Andruckwalzen leicht und möglichst ohne Spezialwerkzeug austauschbar sein, da Wartungsarbeiten in den allermeisten Fällen beim Anwender durchgeführt werden. Aus Platzgründen muß für beide Lagerstellen der Walzenpaare, angeordnet in Wandteilen der Druckeinrichtung vorzugsweise eine Montage und Demontage von einer Seite, beispielsweise der Frontseite der Dr uckeinri chtung her möglieh sein.The roller pairs are often relatively inaccessible. You should therefore be mounted so that Repara tur or maintenance work are still easy to perform. For example, the pressure rollers, which are sensitive due to their elastic surface, must be easy to replace and, if possible, without special tools, since maintenance work is carried out in the vast majority of cases by the user. For reasons of space, assembly and disassembly from one side, for example the front side of the pressure device, must preferably be possible for both bearing points of the roller pairs arranged in wall parts of the printing device.
Im Verlauf einer Transportbahn werden in Druckeinrichtungen eine Mehrzahl solcher Walzenpaare verwendet, deshalb muß die Lagerung der Walzenpaare in den Wandteilen aus Kostengründen möglichst einfach ausgebildet sein, aus wenigenA plurality of such roller pairs are used in the course of a transport path in printing devices, so the storage of the roller pairs in the wall parts must be as simple as possible for reasons of cost, for a few
Teilen bestehen und toleranzunempfindlichen aufgebaut sein, so daß für die Montage keine komplizierten Justierarbeiten notwendig sind. Aus Toleranzgründen werden deshalb auch die beiden Lagsrstellen insbesondere für die Andruckwalze unterschiedlich ausgestaltet. Eine der beiden Lagerstellen bildet ein Festlager, das die Andruckwalze in dem jeweiligen Wandteil in axialer Richtung eindeutig festlegt. Die andere Lagerstelle ist dagegen als Loslager ausgebildet, um fertigungsbedingte, aber auch durch Temperatureinflüsse im laufenden Betrieb hervorgerufene Toleranzen aufzufangen.Parts exist and be constructed insensitive to tolerances, so that no complicated adjustment work is necessary for assembly. For tolerance reasons, the two bearing points are therefore designed differently, in particular for the pressure roller. One of the two bearing points forms a fixed bearing which clearly defines the pressure roller in the respective wall part in the axial direction. The other bearing point, on the other hand, is designed as a floating bearing in order to absorb tolerances caused by production but also by temperature influences during operation.
Trotz dieser unterschiedlichen, zum Teil gegenläufigen Forderungen wird vor allem eine hohe Betriebssicherheit angestrebt, um akzeptable Wartungsintervalle zu erhalten.Despite these different, sometimes contradicting requirements, the main aim is to achieve high operational reliability in order to maintain acceptable maintenance intervals.
Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, eine Lageranordnung der eingangs genannten Art zu schaffen, die bei möglichst einfachem Aufbau mit im wesentlichen den gleichen Konstruktionsteilen sowohl die Ausgestaltung als Los- als auch als Festlager gestattet, einfach zu montieren ist und toleranzunempfindlich in radialer, als auch axialer Richtung ist. Bei einer Lageranordnung der eingangs genannten Art wird diese Aufgabe erfindungsgemäß gelöst mit den im Kennzeichen des Hauptanspruches beschriebenen Merkmalen. Ein wesentliches Element der erfindungsgemäßen Lösung ist ein Lagergehäuse, das sowohl für das Los- als auch das Festlager in gleicher Weise verwendbar ist. Dieses Lagergehäuse nimmt gleichartig ausgebildete Wälzlager in axialer Richtung festgelegt auf, die ihrerseits entsprechend eingepaßte Lagerzapfen der Andruckwalze tragen. Ein anderes Merkmal der erfindungsgemäßen Lösung besteht darin, daß dieses Lagergehäuse Sicherungselemente aufweist, die derart gestaltet sind, daß sich das Lagergehäuse in entsprechende Ausnehmungen der Wandteile der Druckeinrichtung von einer Seite her einschieben läßt und sich im montierten Zustand der Andruckwalze in axialer Richtung unverschiebbar selbst hält. Los- und Festlager der Andruckwalze unterscheiden sich lediglich in einem Element, nämlich einem dem Festlager zugeordneten Sicherungsring. Damit ist der entsprechende Lagerzapfen der Andruckwalze axial im Festlager festgelegt, dagegen ist der entsprechende Lagerzapfen im Loslager in axialer Richtung verschiebbar angeordnet.The present invention is therefore based on the object of creating a bearing arrangement of the type mentioned which, with the simplest possible construction with essentially the same construction parts, allows both the design as a floating and a fixed bearing, is easy to assemble and is insensitive to tolerances in radial, as well as the axial direction. In a bearing arrangement of the type mentioned, this object is achieved according to the invention with the features described in the characterizing part of the main claim. An essential element of the solution according to the invention is a bearing housing which can be used in the same way for both the loose and the fixed bearing. This bearing housing receives similarly designed roller bearings in the axial direction, which in turn carry correspondingly fitted bearing journals of the pressure roller. Another feature of the solution according to the invention is that this bearing housing has securing elements which are designed in such a way that the bearing housing can be inserted into corresponding recesses in the wall parts of the printing device from one side and, in the assembled state of the pressure roller, keeps itself immovably in the axial direction . The floating and fixed bearings of the pressure roller differ only in one element, namely a locking ring assigned to the fixed bearing. The corresponding bearing journal of the pressure roller is thus axially fixed in the fixed bearing, whereas the corresponding bearing journal in the floating bearing is arranged to be displaceable in the axial direction.
Weiterbildungen der Erfindung sind durch die in Unteransprüchen beschriebenen Merkmale gekennzeichnet. Sie werden im folgenden ebenso wie ihre Vorteile bei der Beschreibung eines Ausführungsbeispieles der Erfindung weiter ausgeführt.Developments of the invention are characterized by the features described in the subclaims. In the following, they and their advantages are further explained in the description of an embodiment of the invention.
Das Ausführungsbeispiel der Erfindung wird anhand der Zeichnung beschrieben. Dabei zeigtThe embodiment of the invention is described with reference to the drawing. It shows
FIG 1 und FIG 2 eine Frontansicht bzw. einen Schnitt durch ein Lagergehäuse mit eingesetztem Kugellager,1 and 2 show a front view or a section through a bearing housing with an inserted ball bearing,
FIG 3 eine weitere Schnittdarstellung des Lagergehäuses in einer gegenüber der Darstellung von FIG 2 um 45° gedrehten Lage, FIG 4 eine schematische Darstellung eines Walzenpaares, bestehend aus Transportwalze und Andruckswalze, insbesondere mit den beiden Lagerstellen für die Andruckwalze und3 shows a further sectional illustration of the bearing housing in a position rotated by 45 ° with respect to the illustration in FIG. 2, 4 shows a schematic representation of a pair of rollers, consisting of transport roller and pressure roller, in particular with the two bearing points for the pressure roller and
FIG 5 eine Frontansicht des Festlagers der Andruckwalze.5 shows a front view of the fixed bearing of the pressure roller.
In FIG 1 und 2 ist ein Lagergehäuse 1 in einer Frontansicht bzw. in einem Schnitt dargestellt. Dieses Lagergehäuse ist als Kunststoffspritzteil ausgeführt, das eine Durchgangsbohrung 2 aufweist. In dieser Durchgangsbohrung ist von der in FIG 1 sichtbaren Frontseite her ein Rillenkugellager 3 eingesetzt. Dieses weist einen Bund 4 auf, der am Umfang der Mantelfläche des Lagergehäuses 1 aufsitzt. Festgelegt ist das Rillenkugellager 3 in der in FIG 2 dargestellten Position im Lagergehäuεe 1 durch Rastklinken 5, die in axialer Richtung aus der Frontseite des Lagergehäuses 1, einander diametral gegenüberstehend, vorspringen. Diese Rastklinken 5 sind elastisch ausgestaltet, so daß nach innen weisende Nasen 6 der Rastklinken 5 beim Einsetzen des Rillenkugellagers 3 in radialer Richtung ausweichen und wieder einfallen, sobald das Rillenkugellager mit seinem Bund 4 am Umfang des Lagergehäuses 1 aufsitzt. In dieser in FIG 1 und 2 dargestellten Position umfassen die Rastklinken 5 mit ihren Nasen 6 den Bund 5 des Rillenkugellagers und fixieren dieses in der Durchgangsbohrung 2 des Lagergehäuses 1 in der axialen Richtung.In Figures 1 and 2, a bearing housing 1 is shown in a front view or in a section. This bearing housing is designed as a plastic injection-molded part, which has a through hole 2. A deep groove ball bearing 3 is inserted in this through hole from the front side visible in FIG. 1. This has a collar 4, which is seated on the circumference of the outer surface of the bearing housing 1. The deep groove ball bearing 3 is fixed in the position shown in FIG. 2 in the bearing housing 1 by latches 5 which project axially from the front side of the bearing housing 1, diametrically opposite one another. These locking pawls 5 are designed to be elastic, so that inward-pointing lugs 6 of the locking pawls 5 dodge in radial direction when the deep groove ball bearing 3 is inserted and fall again as soon as the deep groove ball bearing rests with its collar 4 on the circumference of the bearing housing 1. In the position shown in FIGS. 1 and 2, the latches 5 with their lugs 6 encompass the collar 5 of the deep groove ball bearing and fix it in the through bore 2 of the bearing housing 1 in the axial direction.
In FIG 3 ist das Lagergehäuse 1 in einer Schnittdarstellung als Einzelteil gezeigt. Dieser Schnitt von FIG 3 ist in seiner Lage gegenüber der Darstellung von FIG 2 um 45º gedreht, um beide Rastklinken 5 besser zeigen zu können.In Figure 3, the bearing housing 1 is shown in a sectional view as an individual part. This section of FIG. 3 is rotated in its position relative to the illustration of FIG. 2 by 45 ° in order to be able to show both latches 5 better.
Am deutlichsten läßt FIG 1 erkennen, daß das Lagergehäuse 1 zwei einander gegenüberliegende, zueinander parallele Führungsflachen 7 aufweist, d. h. der Umfang des Lagergehäuses 1 ist nicht rotationssymmetrisch ausgebildet, sondern par allel zur Schnittebene von FIG 2 abgesetzt. Damit ist, wie noch zu erläutern sein wird, die Ausgestaltung einer dem Querschnitt des Lagergehäuses 1 entsprechenden Ausnehmung in einem Wandteil der Druckeinrichtung, der das Lagergehäuse aufnimmt, als rechteckiger Schlitz festgelegt, in dem das Lagergehäuse 1 radial verschiebbar angeordnet ist.1 clearly shows that the bearing housing 1 has two mutually opposite, mutually parallel guide surfaces 7, ie the circumference of the bearing housing 1 is not rotationally symmetrical, but par allel to the sectional plane of FIG 2. Thus, as will be explained later, the configuration of a recess corresponding to the cross section of the bearing housing 1 in a wall part of the printing device, which receives the bearing housing, is defined as a rectangular slot in which the bearing housing 1 is arranged to be radially displaceable.
Dazu senkrecht verlaufend, ragen aus der Ober- bzw. Unterseite des Lagergehäuses radial vorspringend zwei Rastansätze 8 bzw. 9 heraus. Diese dienen als Sicherungselemente zum axialen Festlegen des Lagergehäuses 1 in den Wandteilen der Druckeinrichtung. Sie sind deshalb zueinander in axialer Richtung um die Wandstärke der Wandteile versetzt angeordnet.To this end, running vertically, two locking projections 8 and 9 protrude radially from the top and bottom of the bearing housing. These serve as securing elements for axially fixing the bearing housing 1 in the wall parts of the printing device. They are therefore offset from one another in the axial direction by the wall thickness of the wall parts.
In FIG 4 ist nun die Gesamtanordnung eines Walzenpaares, bestehend aus einer angetriebenen Transportwalze 10 und einer frei mitlaufenden Andruckwalze 11 schematisch dargestellt. Ergänzend zeigt FIG 5 eine Frontansicht der einen, als Festlager ausgebildeten Lagerstelle. Im vorliegenden Fall ist die Ausgestaltung und Lagerung der Transportwalze 10 von untergeordneter Bedeutung, sie ist deshalb nicht in Einzelheiten dargestellt. Dagegen ist die Lagerung für die Andruckwalze 11 im einzelnen ausgeführt.4 shows the overall arrangement of a pair of rollers, consisting of a driven transport roller 10 and a free-running pressure roller 11, is shown schematically. FIG. 5 additionally shows a front view of the one bearing designed as a fixed bearing. In the present case, the design and storage of the transport roller 10 is of secondary importance, it is therefore not shown in detail. In contrast, the storage for the pressure roller 11 is carried out in detail.
Die Andruckwalze 11 besitzt zwei Lagerzapfen 12 bzw. 13. Der eine Lagerzapfen 12 der Andruckwalze 11 ist dem axialen Festlager der Andruckwalze 11 zugeordnet. Dieses Festlager sitzt in einem schematisch angedeuteten ersten Wandteil 14 der Druckeinrichtung, das die Transportbahn für einen nicht dargestellten Aufzeichnungsträger seitlich begrenzt. Das in diesem Wandteil 14 angeordnete Festlager für die Andruckrolle 11 ist im montierten Zustand dargestellt.The pressure roller 11 has two bearing journals 12 and 13. One bearing journal 12 of the pressure roller 11 is assigned to the axial fixed bearing of the pressure roller 11. This fixed bearing is seated in a schematically indicated first wall part 14 of the printing device, which laterally delimits the transport path for a recording medium, not shown. The fixed bearing for the pressure roller 11 arranged in this wall part 14 is shown in the assembled state.
Das Wandteil 14 weist eine schlitzförmige Ausnehmung 16 auf. Dieser rechteckige Schlitz besitzt eine Breite, die geringfügig größer ist als der Abstand der Führungsflächen 7 des Lagergehäuses voneinander. Seine Länge in Richtung der Verbindungslinie zwischen den Achsen der Transportwalze 10 und der Andruckwalze 11 ist so bemessen, daß das Lagergehäuse 1 einschließlich der Rastnase 9 in Richtung eines Pfeiles 15 in die Ausnehmung 16 einschiebbar ist. Der in das Lagergehäuse 1 eingesetzte Lagerzapfen 12 der Andruckwalze 11 läuft mit dem Innenring des Rillenkugellagers 3 um. Der Lagerzapfen ist gegen axiale Verschiebung durch einen außen am Innenring des Rillenkugellagers 3 aufsitzenden Sicherungsring 17 gesichert.The wall part 14 has a slot-shaped recess 16. This rectangular slot has a width that is slightly larger than the distance between the guide surfaces 7 of the bearing housing from each other. Its length in the direction of the connecting line between the axes of the transport roller 10 and the pressure roller 11 is dimensioned so that the bearing housing 1 including the locking lug 9 can be inserted into the recess 16 in the direction of an arrow 15. The bearing pin 12 of the pressure roller 11 inserted into the bearing housing 1 rotates with the inner ring of the deep groove ball bearing 3. The bearing journal is secured against axial displacement by a circlip 17 which rests on the outside of the inner ring of the deep groove ball bearing 3.
Außerdem ist eine Zugfeder 18 vorgesehen, die die radiale Anpreßkraft aufbringt, mit der die Andruckwalze 11 gegen die Transportwalze 10 drückt. Diese Zugfeder 18 ist mit ihren Enden in Aufnahmedurchbrüche 19 eingehängt, die in den Wandteilen z. B. 14 zu beiden Seiten des Lagerschlitzes 16 vorgesehen sind. Die Zugfeder 18 ist über die Mantelfläche des Lagergehäuses 1 unter Vorspannung gezogen und drückt damit das Lagergehäuse 1 im Lagerschlitz 16 radial in Richtung der Achse der Transportwalze 10.In addition, a tension spring 18 is provided, which applies the radial contact pressure with which the pressure roller 11 presses against the transport roller 10. This tension spring 18 is suspended with its ends in receiving openings 19 which, for. B. 14 are provided on both sides of the bearing slot 16. The tension spring 18 is pulled over the outer surface of the bearing housing 1 under tension and thus presses the bearing housing 1 in the bearing slot 16 radially in the direction of the axis of the transport roller 10.
Die Anordnung des Loslagers in einem zweiten Wsndteil 20 ist zur Veranschaulichung im Montagezustand gezeigt. In der Darstellung gemäß FIG 4 wird das Lagergehäuse von außen, d. h. wieder in der durch den Pfeil 15 angegebenen Einbaurichtung in den entsprechenden Lagerschlitz 16 eingeschoben, bis der Rastansatz 8 des Lagergehäuses 1 an der Außenfläche des zweiten Wandteiles 20 anliegt. Das eingeschobene Lagergehäuse 1 wird etwas angehoben und rastet damit mit dem Rastansatz 9 an der Innenfläche des zweiten Wandteiles 20 ein. Die abgeknickte Form des Pfeiles 15 repräsentiert εchematisch diese Einbaubewegung. Bei dieser Montage des Lagergehäuseε 1 im zweiten Wandteil 20 wird der Innenring deε Rillenkugellagers 3 über den zweiten Lagerzapfen der Andruckwaize 11 geschoben. Eine Sicherung dieses Lagerzap fens in axialer Richtung ist nicht vorgesehen, da die Lagerung der Andruckwalze 11 im zweiten Wandteil das Loslager bilden soll, mit dem Fertigungs- und Temperaturtoleranzen aufgefangen werden. The arrangement of the floating bearing in a second wall part 20 is shown for illustration in the assembled state. In the illustration according to FIG. 4, the bearing housing is pushed into the corresponding bearing slot 16 from the outside, ie again in the installation direction indicated by the arrow 15, until the latching projection 8 of the bearing housing 1 abuts the outer surface of the second wall part 20. The inserted bearing housing 1 is raised slightly and thus engages with the latching lug 9 on the inner surface of the second wall part 20. The bent shape of arrow 15 schematically represents this installation movement. With this assembly of the bearing housing 1 in the second wall part 20, the inner ring of the deep groove ball bearing 3 is pushed over the second bearing journal of the pressure roller 11. A backup of this bearing tap Fens in the axial direction is not provided, since the mounting of the pressure roller 11 in the second wall part is to form the floating bearing, with which manufacturing and temperature tolerances are absorbed.

Claims

Patentansprüche Claims
1. Lageranordnung für eine Andruckwalze (11) zum Transportieren von Aufzeichnungsträgern in einer Druckeinrichtung, mit Wandteilen (14, 20), in denen die mit elastisch verformbarer Oberfläche ausgestattete Andruckwalze axial mittels Wälzlagern (3) in zwei Lagerstellen und in radialer Richtung mit vorgegebener Spannkraft gegen eine Tranεportwalze (10) drückend festgelegt ist, d a d u r c h g e k e n n z e i c h n e t , daß an beiden Lagerstellen jeweils eines der Wälzlager (3) in einem gleichartig ausgebildeten Lagergehäuse (1) fest angeordnet ist, das selbsthaltende Sicherungselemente (8, 9) zum axialen Festlegen des Lagergehäuses in einer Ausnehmung (16) des zugeordneten Wandteiles (14 bzw. 20) aufweist, daß eine der Lagerstellen als Festlager ausgebildet ist und einen Sicherungsring (17) zum axialen Festlegen eines Lagerzapfens (12) der Andruckwalze in dem Lagergehäuse besitzt und daß in der anderen, als Loslager ausgebildeten Lagerstelle der entsprechende Lagerzapfen (13) mit Radialspiel umläuft.1. Bearing arrangement for a pressure roller (11) for transporting recording media in a printing device, with wall parts (14, 20) in which the pressure roller equipped with an elastically deformable surface is axially by means of roller bearings (3) in two bearing points and in the radial direction with a given clamping force is pressed against a transport roller (10), characterized in that one of the roller bearings (3) is fixedly arranged in a bearing housing (1) of the same design at both bearing points, the self-retaining securing elements (8, 9) for axially fixing the bearing housing in one Recess (16) of the associated wall part (14 or 20) has that one of the bearing points is designed as a fixed bearing and has a locking ring (17) for axially fixing a journal (12) of the pressure roller in the bearing housing and that in the other than The corresponding bearing journal (1 3) revolves with radial play.
2. Lageranordnung nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , daß die Ausnehmungen (16) in dεn Wandteilen (14 bzw. 20) als Schlitz ausgebildet sind und das Lagergehäuse (1) am Umfang einander gegenüberliegend angeordnete, zueinander parallele Führungsflachen (7) aufweist, deren Abstand der Schlitzbreite entspricht und daß die Sicherungselemente als ein Paar von Rastansätzen (8 bzw. 9) ausgebildet sind, die einander diametral gegenüberliegend und aus der Umfangsfläche deε Lagergehäuses radial vorspringend in axialer Richtung um die Dicke des Wandteiles derart versetzt angeordnet sind, so daß sie sich im montierten Zustand an der Innen- bzw. Außenfläche des Wandteiles anlegen.2. Bearing arrangement according to claim 1, characterized in that the recesses (16) in dεn wall parts (14 and 20) are formed as a slot and the bearing housing (1) on the circumference of mutually opposite, mutually parallel guide surfaces (7), the distance between them corresponds to the slot width and that the securing elements are designed as a pair of locking lugs (8 and 9), which are diametrically opposed and radially projecting from the circumferential surface of the bearing housing in the axial direction so as to be offset by the thickness of the wall part, so that they are located When installed, place it on the inside or outside surface of the wall part.
3. Lagerancrdnung nach Anspruch 2, d a d u r c h g e k e n n z e i c h n e t , daß die Rastansätze (ε, 9) auf dem Umfang des Lagergehäuses (1) gegenüber den Führungsflächen (7) um einen rechten Winkel verdreht angeordnet sind und daß die Länge des Schlitzes (16) in den Wandteilen (14 bzw. 20) derart bemessen ist, daß das Lagergehäuse in axialer Richtung in den Schlitz einschiebbar ist.3. Lagerancrdnung according to claim 2, characterized in that the locking lugs (ε, 9) the circumference of the bearing housing (1) relative to the guide surfaces (7) are arranged rotated by a right angle and that the length of the slot (16) in the wall parts (14 and 20) is dimensioned such that the bearing housing in the axial direction in the Slot is insertable.
4. Lageranordnung nach einεm dεr Ansprüchε 1 bis 3, d a d u r c h g e k e n n z e i c h n e t , daß das Lagergehäuse (1) eine Durchgangsbohrung (2) aufweist, in die das zugeordnεte Wälzlager (3) mit seinem Außenring eingesetzt ist, der einen radial vorspringenden Bund (4) als Anlagefläche an den Mantel des Lagergehäuses aufweist.4. Bearing arrangement according to one of claims 1 to 3, characterized in that the bearing housing (1) has a through hole (2) into which the associated roller bearing (3) is inserted with its outer ring, which has a radially projecting collar (4) as a contact surface to the jacket of the bearing housing.
5. Lageranordnung nach Anεpruch 4, d a d u r c h g e k e n n z e i c h n e t , daß das Lagergehäuse (1), dem5. Bearing arrangement according to claim 4, so that the bearing housing (1), the
Sitz des Wälzlagers (3) benachbart, in axialer Richtung vorspringende, elastisch verformbare Rastklinken (5) aufweist, die bei montiertem Wälzlager dessen Bund (4) in axialer Richtung im Lagergehäuse festlegen.Seat of the roller bearing (3) adjacent, in the axial direction protruding, elastically deformable latches (5) which fix the collar (4) in the axial direction in the bearing housing when the roller bearing is mounted.
6. Lageranordnung nach einem der Ansprüche 1 bis 5, d a d u r c h g e k e n n z e i c h n e t , daß an den Lagerstellen eine am entsprechenden Wandteil (14 bzw. 20) befestigte Zugfeder (18) vorgesehen ist, die am Lagergehäuse (1) derart angreift, daß die Andruckwalze (11) unter Federspannung gegen die Transportwalze (10) gedrückt wird.6. Bearing arrangement according to one of claims 1 to 5, characterized in that at the bearing points on the corresponding wall part (14 or 20) attached tension spring (18) is provided which engages on the bearing housing (1) such that the pressure roller (11) is pressed against the transport roller (10) under spring tension.
7. Lageranordnung nach Anspruch 6, d a d u r c h g e k e n n z e i c h n e t , daß die Zugfeder (18), das Lagergehause (1) mindestens teilweise umschlingend, mit beiden Enden unter Vorspannung am entsprechenden Wandteil (14 bzw. 20) festgelegt ist.7. Bearing arrangement according to claim 6, that the tension spring (18), the bearing housing (1) is at least partially looping, with both ends under tension on the corresponding wall part (14 or 20) is fixed.
8. Lageranordnung nach einem der Ansprüche 1 bis 7, d a d u r c h g e k e n n z e i c h n e t , daß das Lagergehäuse (1) als ein Spritzteil aus Kunststoff ausgebildet ist. 8. Bearing arrangement according to one of claims 1 to 7, that the bearing housing (1) is formed as an injection molded part made of plastic.
EP19880904486 1988-03-15 1988-06-01 Bearing arrangement for the impression cylinder of a printer Expired - Lifetime EP0404765B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3808622A DE3808622A1 (en) 1988-03-15 1988-03-15 BEARING ARRANGEMENT FOR A PRESSURE ROLLER OF A PRINTING DEVICE
DE3808622 1988-03-15

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EP0404765A1 true EP0404765A1 (en) 1991-01-02
EP0404765B1 EP0404765B1 (en) 1993-09-01

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ID=6349781

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EP19880904486 Expired - Lifetime EP0404765B1 (en) 1988-03-15 1988-06-01 Bearing arrangement for the impression cylinder of a printer

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US (1) US5044624A (en)
EP (1) EP0404765B1 (en)
JP (1) JPH03504844A (en)
DE (2) DE3808622A1 (en)
WO (1) WO1989008559A1 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5499810A (en) * 1993-12-14 1996-03-19 Unisys Corporation Pinch-roll with floating damper
DE4420186C2 (en) * 1994-06-09 1997-04-17 Heidelberger Druckmasch Ag Device for the external lifting of a transport roll in the feeder of a machine for sheet processing
US5735784A (en) * 1995-06-07 1998-04-07 Ranpak Corp. Loading assembly for a cushioning conversion machine
EP0831990B1 (en) * 1995-06-07 1999-09-22 Ranpak Corp. Loading assembly and method for cushioning conversion machine
US5580043A (en) * 1995-10-23 1996-12-03 Pitney Bowes Inc. Compensating pressure roller
US6267373B1 (en) * 1998-03-27 2001-07-31 Fuji Photo Film Co., Ltd. Bearing structure for rotatable shaft
DE19919733A1 (en) * 1998-05-22 1999-11-25 Heidelberger Druckmasch Ag Device and method for the semi-automatic adjustment of rollers
DE10314298A1 (en) * 2003-03-25 2004-12-23 LTG Mailänder GmbH Bearing and coupling device for an insertable or removable cylinder of a painting or printing machine
JP4444341B2 (en) * 2008-03-10 2010-03-31 シャープ株式会社 Paper transport mechanism and image forming apparatus having the same
DE102012102615B4 (en) 2011-03-30 2023-05-17 Minebea Mitsumi Inc. radiator thermostat
US8910941B2 (en) * 2012-11-27 2014-12-16 Xerox Corporation Pivoting roller nip structure
JP2020204681A (en) * 2019-06-14 2020-12-24 キヤノン株式会社 Rotating member support configuration and fixing device using the same

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3205815A (en) * 1964-01-24 1965-09-14 Kleinewefers Soehne J Textile roller printing machine
US3151551A (en) * 1961-10-19 1964-10-06 Orville V Dutro Removable roller assembly for web processing apparatus
US3721188A (en) * 1972-02-23 1973-03-20 Allied Gear And Machine Co Inc Printing cylinder assembly
FR2316156A1 (en) * 1975-07-04 1977-01-28 Marchand & Meunier Sa Roller mounting for belt driven roller conveyor - has bolts at ends received by aperture and slot in respective side plates
US4431180A (en) * 1980-09-22 1984-02-14 Mita Industrial Company Limited Roller supporting arrangement for electrostatic copying apparatus
GB2095193B (en) * 1981-03-10 1984-12-05 Handling Design & Construction Mounting rollers on rollerways
FR2519583A1 (en) * 1982-01-12 1983-07-18 Smh Alcatel TRAINING AND PRINTING MECHANISM FOR POSTAGE MACHINE
US4850584A (en) * 1985-07-15 1989-07-25 Mita Industrial Co., Ltd. Bearing arrangement in sheet member feed apparatus for use in electrophotographic copying machine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8908559A1 *

Also Published As

Publication number Publication date
JPH03504844A (en) 1991-10-24
DE3883785D1 (en) 1993-10-07
WO1989008559A1 (en) 1989-09-21
US5044624A (en) 1991-09-03
EP0404765B1 (en) 1993-09-01
DE3808622A1 (en) 1989-09-28

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