EP0734858B1 - Rouleau de guidage de feuilles avec surface extérieur réglable - Google Patents

Rouleau de guidage de feuilles avec surface extérieur réglable Download PDF

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Publication number
EP0734858B1
EP0734858B1 EP96104022A EP96104022A EP0734858B1 EP 0734858 B1 EP0734858 B1 EP 0734858B1 EP 96104022 A EP96104022 A EP 96104022A EP 96104022 A EP96104022 A EP 96104022A EP 0734858 B1 EP0734858 B1 EP 0734858B1
Authority
EP
European Patent Office
Prior art keywords
sheet guiding
guiding drum
cover foil
drum according
peripheral
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
EP96104022A
Other languages
German (de)
English (en)
Other versions
EP0734858A1 (fr
Inventor
Klaus Ott
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.)
Manroland AG
Original Assignee
MAN Roland Druckmaschinen AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Publication of EP0734858A1 publication Critical patent/EP0734858A1/fr
Application granted granted Critical
Publication of EP0734858B1 publication Critical patent/EP0734858B1/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
    • B41F21/00—Devices for conveying sheets through printing apparatus or machines
    • B41F21/10—Combinations of transfer drums and grippers

Definitions

  • the invention relates to a sheet guide drum for a sheet-fed rotary printing machine, the outer surface of the sheet guide drum being provided with a jacket film, the radial position of which can be changed by means of an adjustable element.
  • a sheet guide drum of the specified type in which an element which is variable in height by elastic deformation is arranged between the jacket film and the surface of the sheet guide drum in order to adapt the outer diameter of a jacket film, the jacket film at a clamping point the sheet guide drum is fastened with an adjusting device in such a way that the adjusting device detects movement of the jacket film both in Circumferential direction as well as in the radial direction effected simultaneously.
  • This known configuration is complex and has the disadvantage that temperature fluctuations have a strong influence on the outside diameter of the jacket film, since the outside diameter depends on the clamping length of the jacket film.
  • DE 25 30 365 A1 also discloses a device for adjusting the diameter of a roller, the lateral surface of which is divided into several segments which are fastened on radially movable supports.
  • the carriers are mounted on eccentric spindles which are connected via a device converting an axial adjustment path into a rotary movement with an actuator which can be moved coaxially to the roller shaft and which is axially adjustable by means of an adjusting device.
  • an actuator which can be moved coaxially to the roller shaft and which is axially adjustable by means of an adjusting device.
  • the invention has for its object to provide a sheet guide drum of the type mentioned, which is characterized by low construction costs and stability of the outer diameter set in each case.
  • the jacket film has a first circumferential section after the gripper support during the rotational movement of the sheet guide drum, which can be changed in its radial position by means of the adjustable element and has a second circumferential section after the first circumferential section, which is not in its radial position is changeable.
  • the design of the sheet guide drum according to the invention is based on the knowledge that the sheet after leaving the printing line, regardless of its thickness, lies against the sheet guide roller and adapts to the development speed of the drum surface. It has therefore been found that, in order to avoid impairing the print quality, it is sufficient if the outer diameter of the sheet guide drum can only be adjusted to the thickness of the respective print carrier in a partial area, namely the first peripheral section. This has the advantage that the construction costs for the sheet guide drum are reduced and the required adjustability can be achieved with simple and reliable means.
  • the first circumferential section of the jacket film preferably extends over a sector of the sheet guide drum of approximately 160 °, this circumferential section directly adjoining the gripper pad.
  • the adjustable element is formed by a radially movable segment, on which the inner surface of the jacket film rests.
  • the position of the segment also exactly determines the position of the jacket film and the respectively set outer diameter is independent of temperature-related changes in length of the jacket film.
  • the segment can advantageously be arranged at an angular distance of approximately 70 ° to 120 °, preferably at an angular distance of 90 °, from the gripper pad.
  • the position of the segment can be changed in the circumferential direction.
  • the adjustable element or segment preferably has a convexly curved contact surface, with which it lies along a surface line on the inner surface of the jacket film, the radius of curvature of the contact surface being equal to or smaller than the radius of the inner surface of the jacket film.
  • the rigidity of the jacket film is to be chosen as far as possible such that the radial change in position of the adjustable element caused change in curvature of the jacket film remains minimal.
  • the jacket film can be stretched in the device according to the invention at both circumferential ends or only at one circumferential end by spring force in the circumferential direction. It has proven to be particularly advantageous if the front end of the jacket film is attached to the gripper support and the opposite end is tensioned by a spring. It can further be provided that the front end of the jacket film, together with the gripper pad, can be adjusted in the radial direction to adapt to printing media of different thicknesses.
  • an actuator can be provided to adjust the element or segment, which can be adjusted by hand and / or by motor when the machine is running.
  • the guiding properties of the sheet guide drum can also be adapted to the printing medium during operation of the machine.
  • the sheet guide drum shown in the drawing has a cylindrical drum shell 1, which is connected to a shaft 3 by radial walls 2.
  • cutouts 4 are provided, in which there is a gripper support 5 and a gripper shaft (not shown) with grippers.
  • the drum jacket 1 furthermore has a longitudinally extending, axially parallel slot 6, the width of which in the circumferential direction is approximately one fifth of the drum circumference.
  • a segment 7 with a cylindrical contact surface 8 is arranged in the slot 6 and is adjustable in the radial direction.
  • the cylinder axis of the contact surface 8 runs parallel to the axis of rotation of the sheet guiding drum and the cylinder radius of the contact surface 8 is smaller than the radius of the lateral surface 9 of the drum jacket 1.
  • a jacket film 10 is stretched, which consists for example of a sheet.
  • One end of the jacket film 10 is firmly clamped to the gripper pad 5 and the other end of the jacket film 10 is fastened to prestressed springs 11 which are arranged in the gripper channel formed by the cutouts 4.
  • the jacket film 10 lies completely on the jacket surface 9 on all sides.
  • the segment 7 is in a position in which the greatest distance of the contact surface 8 from the axis of rotation is equal to the radius of the lateral surface 9.
  • the jacket film is therefore kept in the area of the slot 6 by the segment 7 on the same outside diameter as by the drum jacket 1.
  • the segment 7 is moved radially outward with the aid of an adjusting device, not shown, for example a shaft with eccentric cams, which makes it a the position shown in FIG. 2 is reached, in which it protrudes from the contour of the lateral surface 9.
  • an adjusting device not shown, for example a shaft with eccentric cams, which makes it a the position shown in FIG. 2 is reached, in which it protrudes from the contour of the lateral surface 9.
  • the jacket film 10 is essentially lifted from the drum jacket 1 in the region marked Y and the circumferential length of the jacket film 10 enlarged in the peripheral portion Y accordingly.
  • the change in the circumferential length in the circumferential section Y is made possible by a displacement of the casing film 10 relative to the drum casing 1 in the region of the circumferential section Z and by additional tensioning of the springs 11.
  • the described adjustment of the segment 7 changes the circular cylindrical starting shape of the jacket film 10 in the peripheral section Y in the direction of an elliptical cylindrical shape.
  • the required adjustment range of the segment 7 is so small in relation to the radius of the lateral surface 9 that the resulting deviation from the shape of the circular cylinder has in practice no detectable effect.
  • the sheet only comes into contact with the peripheral section Z of the sheet guide drum after the sheet end has passed the printing line.
  • the transport speed of the sheet in this section of the sheet guide drum therefore adjusts to the peripheral speed of the jacket film, so that there is no need for a diameter adjustment in this area.

Landscapes

  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Fishing Rods (AREA)
  • Steering Controls (AREA)
  • Stringed Musical Instruments (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)

Claims (11)

  1. Tambour de guidage de feuilles comportant un support de preneur (5) pour une machine d'impression rotative de traitement de feuilles, la face d'enveloppe du tambour de guidage de feuilles étant munie d'une feuille d'enveloppe (10), dont la position radiale peut être modifiée au moyen d'un élément réglable (7),
    caractérisé en ce que la feuille d'enveloppe (10) présente, lors du mouvement de rotation du tambour de guidage de feuilles, en aval du support de preneur (5), un premier tronçon périphérique (Y), dont la position radiale peut être modifiée au moyen de l'élément réglable (7) et, en aval du premier tronçon périphérique (Y), un second tronçon périphérique (Z), dont la position radiale ne peut pas être modifiée.
  2. Tambour de guidage de feuilles selon la revendication 1,
    caractérisé en ce que le premier tronçon périphérique (Y) de la feuille d'enveloppe (10) s'étend sur un secteur du tambour de guidage de feuilles d'à peu près 160°, ce tronçon périphérique (Y) étant raccordé directement au support de preneur (5).
  3. Tambour de guidage de feuilles selon l'une des revendications 1 ou 2,
    caractérisé en se que l'élément réglable (7) est formé par un segment radialement mobile, sur lequel repose la feuille d'enveloppe (10) avec sa face interne.
  4. Tambour de guidage de feuilles selon l'une des revendications précédentes,
    caractérisé en ce que l'élément (7) est agencé dans un écartement angulaire d'environ 70° à 120°, de préférence dans un écartement angulaire de 90°, du support de preneur (5).
  5. Tambour de guidage de feuilles selon l'une des revendications précédentes,
    caractérisé en ce que la position de l'élément (7) peut être modifiée en direction périphérique.
  6. Tambour de guidage de feuilles selon l'une des revendications précédentes,
    caractérisé en ce que l'élément réglable (7) présente une face d'appui (8) cintrée de façon convexe, par laquelle il prend appui le long d'une ligne d'enveloppe sur la face interne de la feuille d'enveloppe (10), le rayon de cintrage de la face d'appui (8) étant égal à ou plus petit que le rayon de la face interne de la feuille d'enveloppe (10).
  7. Tambour de guidage de feuilles selon l'une des revendications précédentes,
    caractérisé en ce que la rigidité de la feuille d'enveloppe (10) est choisie de sorte que la modification du cintrage de la feuille d'enveloppe (10), provoquée par la modification de la position radiale de l'élément de réglage (7), reste minimale.
  8. Tambour de guidage de feuilles selon l'une des revendications précédentes,
    caractérisé en ce que la feuille d'enveloppe (10) est tendue en direction périphérique par un ressort (11), aux deux extrémités périphériques ou uniquement à une extrémité périphérique.
  9. Tambour de guidage de feuilles selon l'une des revendications précédentes,
    caractérisé en ce que l'extrémité avant de la feuille d'enveloppe (10) peut être déplacée en direction radiale, conjointement avec le support de preneur (5), pour être adaptée à des supports d'impression d'épaisseurs différentes.
  10. Tambour de guidage de feuilles selon l'une des revendications 8 ou 9,
    caractérisé en ce que l'extrémité avant de la feuille d'enveloppe (10) est fixée sur le support de preneur (5).
  11. Tambour de guidage de feuilles selon l'une des revendications précédentes,
    caractérisé en ce que l'on prévoit, pour le réglage de l'élément (7), un servomoteur qui peut être réglé, lors du fonctionnement de la machine, manuellement et/ou par moteur.
EP96104022A 1995-03-28 1996-03-14 Rouleau de guidage de feuilles avec surface extérieur réglable Expired - Lifetime EP0734858B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19511341A DE19511341A1 (de) 1995-03-28 1995-03-28 Bogenführungstrommel mit verstellbarer Mantelfläche
DE19511341 1995-03-28

Publications (2)

Publication Number Publication Date
EP0734858A1 EP0734858A1 (fr) 1996-10-02
EP0734858B1 true EP0734858B1 (fr) 1997-12-29

Family

ID=7757954

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96104022A Expired - Lifetime EP0734858B1 (fr) 1995-03-28 1996-03-14 Rouleau de guidage de feuilles avec surface extérieur réglable

Country Status (3)

Country Link
EP (1) EP0734858B1 (fr)
AT (1) ATE161474T1 (fr)
DE (2) DE19511341A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7320281B2 (en) 2002-12-20 2008-01-22 Heidelberger Druckmaschinen Ag Method of varying a drum profile of a vario drum and vario drum for implementing the method

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2881445B2 (ja) * 1988-02-05 1999-04-12 プリンティング、リサーチ、インク 紙用ガイドローラー及びその製法
DE102009019020B4 (de) 2008-05-23 2021-05-20 Heidelberger Druckmaschinen Ag Vorrichtung zum Wenden eines Bogen während des Förderns durch eine Druckmaschine

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1358843A (en) * 1917-01-17 1920-11-16 Grass William Printing-press
GB1230314A (fr) * 1969-10-23 1971-04-28
DE2530365C3 (de) * 1975-07-08 1979-05-17 Maschinenfabrik Augsburg-Nuernberg Ag, 8900 Augsburg Einrichtung zur Durchmesserverstellung eines Zylinders
DE2700419C3 (de) * 1977-01-07 1984-10-04 Miller Printing Equipment Corp., Pittsburgh, Pa. Bogenübertragungszylinder für auf Schön- und Widerdruck einstellbare Bogen-Rotations-Druckmaschinen
DE2824733C2 (de) * 1978-06-06 1984-03-15 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Umführtrommel für Schön- und Widerdruckmaschinen
DE3024893A1 (de) * 1980-07-01 1982-01-28 Continental Gummi-Werke Ag, 3000 Hannover Walze fuer die druckbehandlung von warenbahnen
GB2166388B (en) * 1984-09-28 1988-10-26 Rotaprint Plc Expanding cylinder
DE3902923C2 (de) * 1988-03-16 1994-06-01 Heidelberger Druckmasch Ag Bogenführungstrommel für Bogenrotationsdruckmaschinen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7320281B2 (en) 2002-12-20 2008-01-22 Heidelberger Druckmaschinen Ag Method of varying a drum profile of a vario drum and vario drum for implementing the method
DE10355045B4 (de) 2002-12-20 2018-09-06 Heidelberger Druckmaschinen Ag Verfahren zur Variation eines Trommelprofils einer Vario-Trommel und Vario-Trommel zur Durchführung des Verfahrens

Also Published As

Publication number Publication date
DE59600063D1 (de) 1998-02-05
DE19511341A1 (de) 1996-10-02
ATE161474T1 (de) 1998-01-15
EP0734858A1 (fr) 1996-10-02

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