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EP0404765B1 - Agencement de palier pour cylindre de pression d'un dispositif d'impression - Google Patents

Agencement de palier pour cylindre de pression d'un dispositif d'impression Download PDF

Info

Publication number
EP0404765B1
EP0404765B1 EP19880904486 EP88904486A EP0404765B1 EP 0404765 B1 EP0404765 B1 EP 0404765B1 EP 19880904486 EP19880904486 EP 19880904486 EP 88904486 A EP88904486 A EP 88904486A EP 0404765 B1 EP0404765 B1 EP 0404765B1
Authority
EP
European Patent Office
Prior art keywords
bearing
bearing housing
arrangement according
housing
designed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP19880904486
Other languages
German (de)
English (en)
Other versions
EP0404765A1 (fr
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 Nixdorf Informationssysteme 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 Nixdorf Informationssysteme AG filed Critical Siemens Nixdorf Informationssysteme AG
Publication of EP0404765A1 publication Critical patent/EP0404765A1/fr
Application granted granted Critical
Publication of EP0404765B1 publication Critical patent/EP0404765B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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 transport means, which consist of a driven transport roller and an idling pressure roller that presses against the transport roller with a given pressure force.
  • transport means consist of a driven transport roller and an idling pressure roller that presses against the transport roller with a given pressure 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 uniformly record the recording medium passing between the pair of rollers.
  • 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. For this reason, they should be installed so that repair or maintenance work is 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 most cases by the user.
  • assembly and disassembly from one side, for example the front side of the printing device must preferably be possible for both bearing points of the roller pairs arranged in wall parts of the printing device.
  • the bearing arrangement of the roller pairs in the wall parts must be as simple as possible for cost reasons, consist of a few parts and be constructed insensitive to tolerances, so that no complicated adjustment work is necessary for the assembly.
  • 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. Despite these different, sometimes contradicting requirements, 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.
  • 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 pins 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, holds 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.
  • 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 into 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 latching pawls 5 which protrude in the axial direction 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-facing lugs 6 of the locking pawls 5 dodge in radial direction when the deep groove ball bearing 3 is inserted, and engage again as soon as the collar 4 rests on the circumference of the bearing housing 1 with its collar 4.
  • the latches 5 with their lugs 6 enclose 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 in relation 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 parallel offset to the cutting 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 that 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. 5 additionally shows a front view of the one bearing designed as a fixed bearing.
  • the design and storage of the transport roller 10 is of secondary importance, it is therefore not shown in detail.
  • 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. Its length in the direction of the connecting line between the axes of the transport roller 10 and the pressure roller 11 is dimensioned such 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 retaining ring 17 seated 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 prestress 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, that is to say 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 somewhat and thus engages with the latching lug 9 on the inner surface of the second wall part 20.
  • the bent shape of the arrow 15 schematically represents this installation movement.
  • the inner ring of the deep groove ball bearing 3 is pushed over the second bearing pin of the pressure roller 11. A backup of this journal
  • There is no provision in the axial direction since the mounting of the pressure roller 11 in the second wall part is intended to form the floating bearing with which manufacturing and temperature tolerances are absorbed.

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)
  • Handling Of Cut Paper (AREA)
  • Delivering By Means Of Belts And Rollers (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.

Claims (8)

  1. Dispositif à roulements pour un cylindre de serrage (11) en vue de transporter de supports d'enregistrement dans un dispositif d'impression, comportant des parties de paroi (14, 20), dans lesquelles le rouleau de serrage pourvu d'une surface déformable élastiquement est fixé au moyen de roulements (3), dans deux zones d'appui et de manière à être serré dans la direction radiale, avec une force de serrage prédéterminée, sur un cylindre de transport (10), caractérisé par le fait que dans les deux zones d'appui, les roulements respectifs (3) sont montés fixes dans des logements respectifs identiques (1) de roulements, dont chacun possède des éléments de sécurité à accrochage (8,9) pour la fixation axiale du logement de roulement dans un évidement (16) de la partie de paroi associée (14 ou 20), que l'une des zones d'appui est constituée sous la forme d'un palier fixe et possède une bague de sécurité (17) utilisée pour bloquer axialement un tourillon (12) du cylindre de serrage dans le logement de roulement, et que le tourillon correspondant (13) tourne, avec un jeu axial, dans l'autre zone d'appui, constituée sous la forme d'un palier libre.
  2. Dispositif à roulements suivant la revendication 1, caractérisé par le fait que les évidements (16) ménagés dans les parties de paroi (14 ou 20) sont constitués sous la forme d'une fente et que le logement de roulement (1) possède des surfaces de guidage (7) qui sont disposées réciproquement en vis-à-vis sur la périphérie et sont parallèles entre elles et dont la distance correspond à la largeur de la fente, et que les éléments de sécurité sont constitués sous la forme d'un couple de doigts d'encliquetage (8 ou 9), qui sont disposés dans des positions diamétralement opposées et font saillie radialement sur la surface périphérique du logement de roulement et sont décalés dans la direction axiale, d'une distance correspondant à l'épaisseur de la partie de paroi, de sorte qu'à l'état monté, ils s'appliquent sur la face intérieure ou sur la face extérieure de la partie de paroi.
  3. Dispositif à roulements suivant la revendication 2, caractérisé en ce que les doigts d'encliquetage (8, 9) sont disposés sur le pourtour du logement de roulement (1) en étant décalés d'un angle droit par rapport aux surfaces de guidage (7), et que la longueur de la fente (16) ménagée dans les parties de paroi (14 ou 20) est telle que le logement de roulement peut être inséré dans la fente dans la direction axiale.
  4. Dispositif à roulements suivant l'une des revendications 1 à 3, caractérisé par le fait que le logement de roulement (1) possède un perçage traversant (2), dans lequel le roulement associé (3) est inséré par sa bague extérieure, qui comporte un collet (4) radialement en saillie comme surface destinée à s'appliquer sur la surface latérale du logement de roulement.
  5. Dispositif à roulements suivant la revendication 4, caractérisé par le fait que le logement de roulement (1) comporte, à proximité du siège du roulement (3), des cliquets d'encliquetage (5) qui font saillie dans la direction axiale, qui sont déformables élastiquement et qui, lorsque le roulement est monté, bloquent le collet (4) de ce roulement dans la direction axiale dans le logement de roulement.
  6. Dispositif à roulements suivant l'une des revendications 1 à 5, caractérisé en ce qu'au niveau des zones d'appui, il est prévu un ressort de traction (18), qui est fixé à la partie de paroi correspondante (14 ou 20) et qui s'accroche au logement de roulement (1) de telle sorte que le cylindre de serrage (11) soit repoussé sur le cylindre de transport (10) sous l'action de la tension d'un ressort.
  7. Dispositif à roulements suivant la revendication 6, caractérisé en ce que le ressort de traction (18) est fixé par ses deux extrémités, sous précontrainte, à la partie de paroi correspondant (14 ou 20), tout entourant au moins partiellement le logement de roulement (1).
  8. Dispositif à roulements suivant l'une des revendications 1 à 7, caractérisé par le fait que le logement de roulement (1) est constitué sous la forme d'une pièce en matière plastique moulée par injection.
EP19880904486 1988-03-15 1988-06-01 Agencement de palier pour cylindre de pression d'un dispositif d'impression Expired - Lifetime EP0404765B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3808622 1988-03-15
DE3808622A DE3808622A1 (de) 1988-03-15 1988-03-15 Lageranordnung fuer eine andruckwalze einer druckeinrichtung

Publications (2)

Publication Number Publication Date
EP0404765A1 EP0404765A1 (fr) 1991-01-02
EP0404765B1 true EP0404765B1 (fr) 1993-09-01

Family

ID=6349781

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880904486 Expired - Lifetime EP0404765B1 (fr) 1988-03-15 1988-06-01 Agencement de palier pour cylindre de pression d'un dispositif d'impression

Country Status (5)

Country Link
US (1) US5044624A (fr)
EP (1) EP0404765B1 (fr)
JP (1) JPH03504844A (fr)
DE (2) DE3808622A1 (fr)
WO (1) WO1989008559A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1462253A3 (fr) * 2003-03-25 2007-01-31 LTG Mailänder GmbH Dispositif d'embrayage ou de palier pour un cylindre remplacable d'une machine à lacquer ou à imprimer

Families Citing this family (11)

* 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 (de) * 1994-06-09 1997-04-17 Heidelberger Druckmasch Ag Vorrichtung zum extemporären Abheben einer Transportrolle im Anleger einer Maschine zur Bogenbearbeitung
WO1996040491A1 (fr) * 1995-06-07 1996-12-19 Ranpak Corp. Dispositif de chargement et procede pour une machine de conversion de produits de calage
US5735784A (en) * 1995-06-07 1998-04-07 Ranpak Corp. Loading assembly for a 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
EP0958918A1 (fr) * 1998-05-22 1999-11-24 Heidelberger Druckmaschinen Aktiengesellschaft Dispositif et procédé pour l'ajustement semi-automatique de rouleaux
JP4444341B2 (ja) * 2008-03-10 2010-03-31 シャープ株式会社 用紙搬送機構、およびこれを備えた画像形成装置
US9599352B2 (en) 2011-03-30 2017-03-21 Minebea Co., Ltd. Radiator thermostat
US8910941B2 (en) * 2012-11-27 2014-12-16 Xerox Corporation Pivoting roller nip structure
JP2020204681A (ja) * 2019-06-14 2020-12-24 キヤノン株式会社 回転部材支持構成およびそれを用いた定着装置

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 (fr) * 1975-07-04 1977-01-28 Marchand & Meunier Sa Dispositif de montage de rouleaux pour transporteurs a rouleaux
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 (fr) * 1982-01-12 1983-07-18 Smh Alcatel Mecanisme d'entrainement et d'impression pour machine a affranchir
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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1462253A3 (fr) * 2003-03-25 2007-01-31 LTG Mailänder GmbH Dispositif d'embrayage ou de palier pour un cylindre remplacable d'une machine à lacquer ou à imprimer

Also Published As

Publication number Publication date
WO1989008559A1 (fr) 1989-09-21
US5044624A (en) 1991-09-03
DE3808622A1 (de) 1989-09-28
EP0404765A1 (fr) 1991-01-02
JPH03504844A (ja) 1991-10-24
DE3883785D1 (de) 1993-10-07

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