EP0259636B1 - Dispositif de détection de défauts - Google Patents

Dispositif de détection de défauts Download PDF

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Publication number
EP0259636B1
EP0259636B1 EP87111629A EP87111629A EP0259636B1 EP 0259636 B1 EP0259636 B1 EP 0259636B1 EP 87111629 A EP87111629 A EP 87111629A EP 87111629 A EP87111629 A EP 87111629A EP 0259636 B1 EP0259636 B1 EP 0259636B1
Authority
EP
European Patent Office
Prior art keywords
control unit
controlled
printing press
frequencies
printing
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
EP87111629A
Other languages
German (de)
English (en)
Other versions
EP0259636A3 (en
EP0259636A2 (fr
Inventor
Claus Dipl.-Ing. Simeth
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6309002&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0259636(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Priority to AT87111629T priority Critical patent/ATE63857T1/de
Publication of EP0259636A2 publication Critical patent/EP0259636A2/fr
Publication of EP0259636A3 publication Critical patent/EP0259636A3/de
Application granted granted Critical
Publication of EP0259636B1 publication Critical patent/EP0259636B1/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
    • B41F33/00—Indicating, counting, warning, control or safety devices

Definitions

  • the invention relates to a device according to the preamble of claim 1, as described in EP-A-0 087 571.
  • DE-OS 2 430 212 and DE-PS 3 034 212 it is known, for example, to use a density measuring device to record the print quality of the sheets processed and to mark or discard sheets of inferior quality.
  • the invention has for its object to detect pressure problems that occur, which lead above all to duplication, by measurement.
  • the measured values obtained can be processed for automatic control of the machine, for information display for the printer and for machine protection. If a doubling is indicated by the fact that the peeling noises of the sheet come into a critical zone, commands can be triggered in order to change the rheological properties of the printing ink used, such as the color consistency.
  • the temperature of the tempering agent flowing through the ink rubbers can be changed, but the time for washing the rubber blanket can also be brought forward or the washing interval can be changed. In extreme cases, the machine can be stopped if there are no tearing noises, that is to say because of a false sheet, or if there is a particular increase in the amount of noise.
  • the invention also makes use of the knowledge that the cause of the doubling or a changed sporadically occurring tearing behavior of the printing carrier web or a sheet from the blanket cylinder is a result of any mechanical unrest in the press. At some point the machine goes for a short time, for example on a cylinder or when guiding the web, the uniformity is lost, so that the errors mentioned above occur. Based on this knowledge, it was also found that the loss of uniformity in the printing process or in the machine brings about a change in the sound frequency spectrum.
  • the sound emissions are recorded by the sensors 5, 6, 7, 8 and fed to a control unit 17, which may include a microprocessor, an amplifier or suitable electrical or electronic control devices.
  • This control unit 17 further comprises a frequency filter 18, with the aid of which the frequencies occurring during normal operation of a machine or the relevant frequency spectrum can be filtered out.
  • the bandwidth is approximately between 200 Hz and 20,000 Hz.
  • the printer can determine from a certain deviating frequency behavior, represented by the curve at 20, that the machine is doubled or spontaneous undesirable or atypical web or sheet breaks occur, which lead to defective sheets or folded copies.
  • These frequencies can also be supplied to a loudspeaker 21 so that the operator is acoustically alerted to defective sheets or copies, i.e. it is audible that the machine is doubled.
  • the error detection device can be used in both sheet-fed and web-fed rotary printing machines.
  • the arrangement of the sensors 5, 6, 7, 8 can be such that the sound is detected via air, or the sound or the vibrations can be detected directly on the machine frame or, for example, on the cylinders or their bearings.
  • control unit 17 can be used to control a device 22, 23 for temperature control of the rubbers 24, 25, 26, 27 of the inking units 28, 29.
  • control unit 17 controls corresponding rubber blanket washing devices 30, 31 after the speed of the printing press has been previously reduced by actuating the control panel 32.
  • the cause of the error can be localized and thus a corresponding programming or connection of the control unit 17 is possible.
  • the printer can see that the cause of undesired duplication is to be found in a specific printing unit or in a specific location on the machine.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Air Bags (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Manufacture, Treatment Of Glass Fibers (AREA)

Claims (6)

  1. Dispositif dans une machine imprimante, qui peut être contrôlée en ce qui concerne son fonctionnement et son état de marche par des capteurs agencés en différentes positions, l'obtention de valeurs de mesure déterminées étant utilisable pour l'affichage ou le déclenchement de processus de commande et les capteurs étant des capteurs (5,6,7,8), reliés à une unité de commande (17), de bruits de structure ou transmis par l'air et l'unité de commande (17) présentant un filtre de fréquences (18) pour filtrer des fréquences caractéristiques,
    caractérisé en ce que les capteurs (5,6,7,8) sont agencés dans la zone de la fente de sortie entre à chaque fois les cylindres porte-blanchets (9,10,11,12) et les cylindres d'impression (13,14), et les filtres de fréquences (18) sont conçus pour le filtrage des fréquences, produites lors d'une impression perturbée, par exemple dans le cas de maculature, qui s'écartent des fréquences normales lors du décollement du support d'impression du cylindre porte-blanchet (9,10,11, 12) habituellement pendant le fonctionnement de la machine, et en ce que, en utilisant ces fréquences par l'intermédiaire de l'unité de commande (17), l'état de fonctionnement de la machine imprimante peut être modifié.
  2. Dispositif selon la revendication 1,
    caractérisé en ce qu'un dispositif (22,23;26,27) pour l'équilibrage de température des rouleaux distributeurs (24,25) peut être commandé par l'unité de commande (17).
  3. Dispositif selon la revendication 1 ou 2,
    caractérisé en ce qu'un dispositif de marquage de feuilles dans une machine à feuilles peut être commandé par l'unité de commande (17).
  4. Dispositif selon la revendication 1,2 ou 3,
    caractérisé en ce qu'un dispositif pour maintenir constante la tension de bande dans des rotatives à rouleaux peut être commandé par l'unité de commande (17).
  5. Dispositif selon la revendication 1,2,3 ou 4,
    caractérisé en ce que le moteur d'entraînement et les dispositifs de lavage (30,31) des blanchets de la machine imprimante peuvent être commandés par l'unité de commande (17).
  6. Dispositif selon la revendication 1,
    caractérisé en ce que le capteur est un microphone, en aval duquel est prévu un dispositif amplificateur à haut-parleur (21).
EP87111629A 1986-09-05 1987-08-11 Dispositif de détection de défauts Expired - Lifetime EP0259636B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87111629T ATE63857T1 (de) 1986-09-05 1987-08-11 Fehlerfeststelleinrichtung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863630288 DE3630288A1 (de) 1986-09-05 1986-09-05 Fehlerfeststelleinrichtung
DE3630288 1986-09-05

Publications (3)

Publication Number Publication Date
EP0259636A2 EP0259636A2 (fr) 1988-03-16
EP0259636A3 EP0259636A3 (en) 1988-12-21
EP0259636B1 true EP0259636B1 (fr) 1991-05-29

Family

ID=6309002

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87111629A Expired - Lifetime EP0259636B1 (fr) 1986-09-05 1987-08-11 Dispositif de détection de défauts

Country Status (3)

Country Link
EP (1) EP0259636B1 (fr)
AT (1) ATE63857T1 (fr)
DE (2) DE3630288A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4131679C1 (fr) * 1991-09-24 1993-04-08 Man Roland Druckmaschinen Ag, 6050 Offenbach, De
EP2275704A1 (fr) 2009-07-15 2011-01-19 WIFAG Maschinenfabrik AG Surveillance d'une machine produisant des oscillations

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE428540B (sv) * 1981-04-13 1983-07-11 Wibra Kb Sett och anordning for overvakning av verktygsstatus i en verktygsmaskin med cyklisk bearbetning
DE3205941C2 (de) * 1982-02-19 1986-10-30 Forschungsgesellschaft Druckmaschinen E.V., 6000 Frankfurt Vorrichtung zur berührungslosen meßtechnischen Erfassung des Flüssigkeitstransports durch Walzenspalte in Farb- oder Feuchtwerken von Druckmaschinen
DE3225360A1 (de) * 1982-07-07 1984-02-09 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Rollenoffset-rotationsdruckmaschine

Also Published As

Publication number Publication date
DE3770377D1 (de) 1991-07-04
EP0259636A3 (en) 1988-12-21
DE3630288C2 (fr) 1993-04-08
ATE63857T1 (de) 1991-06-15
EP0259636A2 (fr) 1988-03-16
DE3630288A1 (de) 1988-03-17

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