EP1138488B1 - Procédé et dispositif pour éviter le dépassement d'un seuil dans une machine à imprimer des feuilles - Google Patents

Procédé et dispositif pour éviter le dépassement d'un seuil dans une machine à imprimer des feuilles Download PDF

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Publication number
EP1138488B1
EP1138488B1 EP01104581A EP01104581A EP1138488B1 EP 1138488 B1 EP1138488 B1 EP 1138488B1 EP 01104581 A EP01104581 A EP 01104581A EP 01104581 A EP01104581 A EP 01104581A EP 1138488 B1 EP1138488 B1 EP 1138488B1
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EP
European Patent Office
Prior art keywords
values
sheets
development trend
limit values
individual
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
EP01104581A
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German (de)
English (en)
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EP1138488A1 (fr
EP1138488B2 (fr
Inventor
Jürgen Dr. Rautert
Markus Gerstenberger
Burkhard Maass
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.)
Heidelberger Druckmaschinen AG
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Heidelberger Druckmaschinen AG
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Application filed by Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP1138488A1 publication Critical patent/EP1138488A1/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/04—Tripping devices or stop-motions
    • B41F33/14—Automatic control of tripping devices by feelers, photoelectric devices, pneumatic devices, or other detectors

Definitions

  • the invention relates to a method for preventing limit crossings in sheet-fed printing machines, wherein values relevant to the printing process with respect to the individual sheets are detected and processed in such a way that predetermined limit values are maintained.
  • the invention further relates to an apparatus for carrying out this method with at least one sensor for detecting the values with respect to the individual sheets.
  • GB-A-2 175 116 a device which monitors operations in machines.
  • the sensors can be attached to faulty positions in the machine and provide signals to the operator.
  • the signals show either the agreement with the setpoint, or the positive or negative deviation from the setpoint. There is a given tolerance between the respective signals. Based on these signals, the operator can take appropriate action. In case of a threatening error, the machine will be shut down automatically.
  • the disadvantage of this device is that the operator can not recognize how the trend of the relevant values continues.
  • the invention is therefore based on the object of making available a method and a device of the type mentioned at the beginning, by which wastepaper prints or an interruption of the printing due to non-observed values are largely prevented.
  • the object is achieved according to the invention by a method which is characterized in that the development trend of a relevant value is detected in the course of a sequence of sheets and measures are taken if the values change, and if the development trend continues predetermined number of sheets would lead to a limit violation.
  • a device with an evaluation device which represents the development trend of the detected values for the initiation of countermeasures, serves to carry out the method.
  • the countermeasures can be taken as soon as values show a development tendency which is heading towards the limit value.
  • the achievement of the limit value is usually prevented because timely countermeasures against this trend can be made. In this way, neither useless waste printing nor a machine stop occurs. The productivity and thus the economic efficiency of the machine is increased.
  • the invention can be implemented in various ways.
  • One possibility is to inform the operator of the development trend of the values in good time before reaching the limit in order to initiate countermeasures.
  • suitable display options are proposed.
  • Another possibility is that a controller automatically counteracts such a development trend. The latter is particularly useful in high-speed machines, since the introduction of countermeasures must be relatively fast.
  • a further development of the method envisages that individual values shedding the development trend for the determination of the development trend are eliminated. There can always be individual single values that are shedding, which must be eliminated in order to determine the development trend in order to avoid a falsification of the result. Such shearing individual values can occur, for example, in that individual sheets have a defect with respect to their nature or dimensions.
  • the values at which a limit value violation is to be avoided by the method according to the invention may be the most varied values which are related to the individual sheets to be processed.
  • the values are the position of the sheets at a certain machine angle, the position of the sheet leading edges or a page offset of sheets.
  • the values represent errors in the correction within the machine, such as drawing errors with respect to the application of sheets to a page mark.
  • a skew of bends, registration errors, or other values related to the individual sheets may also be detected.
  • a particularly important application is the acquisition of values on the feeder of the sheetfed press, since the exact installation of the sheet are the prerequisite for trouble-free operation of the machine.
  • the recorded values can be displayed so that an operator can take countermeasures in good time. It is possible to suggest such countermeasures to the operator, or a controller for correcting the values may also be activated.
  • the representation of the values by the device may be visual or audible, to cause an operator to take countermeasures, or it is possible that the evaluation device displays the detected values by signals transmitted to a controller for automatically performing the countermeasures.
  • An expedient embodiment of the device provides that the representation takes place on at least one display, wherein the values of a predetermined number of a sequence of sheets which have passed the at least one sensor last, always supplemented by the value of the current sheet and as a sequence of Individual values are displayed in relation to the setpoint and to the limit values.
  • An operator can grasp the development trend at a glance on such a display, and it is it possible to take timely countermeasures to prevent the limit from being exceeded.
  • One way of presenting the display shows the values of the individual sheets as bars, with the end of the bars showing the position of the respective value in relation to the setpoint and limit values, which are represented by lines. In this way, for example, the values of 20 sheets can be displayed, and the operator immediately recognizes when a development trend is towards the limit.
  • Scattering individual values are also recognizable and can be ignored for taking countermeasures against the development trend.
  • a further representation provides that the display shows the values of the individual sheets as a curve, which represents the time evolution of the individual values in relation to the setpoint and limit values. This representation is expediently selected when, with fast-running machines, a very large number of individual values occur within a short period of time and thus the representation of the individual values is no longer possible. It is essential in the representations that a period of development can be detected in such a way that sufficient reaction time is possible to take the appropriate countermeasures.
  • a signaling device is activated by the evaluation as soon as a change occurs in the values, which leads to a border crossing at a further predetermined number of sheets in a continuation of the development trend would.
  • the signaling device may be an optical and / or acoustic signaling device.
  • the evaluation device In order for the operator to take the correct countermeasure in a short time, provision can be made for the evaluation device to actuate a further display in the case of the above-mentioned change of the values in order to display stored countermeasures in a readable manner.
  • the operator can be made aware of the error source or it is displayed directly, which change is to be made.
  • a plurality of displays for displaying a plurality of types of values are arranged on the control panel of the printing press.
  • the other display which displays information as text or symbol, can also be located there. This allows the operator to get an idea of the state of the machine at their primary location.
  • the representation of the detected values is effected by signals, wherein a control in such a change of the signals representing the values that would occur at a further predetermined number of sheets a continuation of the development trend, at least one actuator for changing the Development trends is driven.
  • This automatic evaluation and processing of the signals not only relieves the operator, it also makes it possible to take countermeasures in fractions of a second. For very fast-moving presses, this is often the only way to intercept a development trend before reaching the limit by appropriate countermeasures.
  • a particularly important application of the device is at the feeder of a sheet-fed press.
  • at least one sensor is arranged on the sheet feeder, and the evaluation device is used to ensure a sheet system in compliance with the specified limits.
  • the controller can also be designed such that various relevant data, such as the paper type, the paper weight or the format can be entered.
  • the basic setting is then automatically made by the controller, for example with regard to the feeder phase, the negative pressure in the feed table, the pulling force for the alignment of the sheets on the side mark, etc. In operation, this basic setting is corrected by recording the actual values achieved.
  • 1 shows a representation of the basic idea of the invention on the basis of a series of values, wherein the x-axis shows the height of the values and the individual values are lined up in their temporal sequence along the time axis t.
  • 3 is the nominal value
  • 4 the upper limit and 4 'the lower limit value 1 is the value of the last arc, 1' that of the second to last etc.
  • the detected values 1, 1 ', 1 ", 1' Such a development trend 12 may, for example, move in the direction of the limit value 4 in a prognosis time point 11.
  • a prognosis is created in which a certain number of values are used For example, the last four values may be used to predict a trend for the next three values, which are designated by reference numeral 12. If the values used for the forecast are more exasperating Single value 8, it will not be used for the forecast because it would falsify it.
  • the forecast time 11 As shown, k exceeding the limit value 4 and therefore no countermeasure is initiated. This is different in the forecast time 11 ', for which it follows that an exceedance of the limit value 4 must be expected after three further curves. Therefore, a countermeasure must be taken at forecast time 11 'in order to prevent the limit value being exceeded.
  • Fig. 2 shows a display device for an operator.
  • Another display 7 serves to convey readable information 14 to the operator. These can indicate the source of the error or recommend a countermeasure to the operator.
  • the display 2 indicates the sheet arrival, with a machine angle of 270 ° is the target value for the sheet arrival. Deviations of 10 ° are defined as the upper limit value 4 and as the lower limit value 4 '.
  • the setpoint 3, the lower limit value 4 'and the upper limit value 4 are indicated by lines 6 on the display 2.
  • the individual values 1, 1 ', 1 ", 1'", ... are represented by bars 5, where 1 is the value of the current arc. These values 1, 1 ', 1 ", 1'",. .. are always supplemented by the value of the current arc, so that the display 2 always moves with respect to the temporal display from right to left and thereby a certain number of values 1, 1 ', 1 ", 1' '', ...
  • a signal device 15 which emits an optical or acoustic signal when in a prognosis time, such as 11 ', is to be expected in exceeding the limit value 4 in the next sheet.
  • a readable countermeasure 14 can be displayed on the further display 7, as an example, the operator is here asked to check the air pressure of the suction belt.
  • the further display 2 ' indicates oblique arc, with an offset of the arc of plus or minus 5 mm as limit 4, 4' is located. Because on this display 2 'the Values 1, 1 ', 1 ", 1''', ... move in the direction of the limit value 4, an indication of the signaling device 15 was triggered.
  • the values can also be represented by means of a curve 16 instead of by individual bars 5.
  • Such a representation is to be preferred if the displayed time span comprises too many values 1, 1 ', 1 ", 1'",..., In order to be able to visually detect them with a bar graph.

Landscapes

  • Controlling Sheets Or Webs (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Claims (20)

  1. Procédé pour éviter les dépassements de valeurs limites dans les machines à imprimer des feuilles, dans lequel des valeurs appropriées pour le processus d'impression concernant les feuilles individuelles sont détectées et traitées de telle manière que des valeurs limites prédéterminées soient respectées, caractérisé en ce que la tendance du développement d'une valeur appropriée est détectée au cours d'une séquence de feuilles et des mesures sont prises lorsqu'une variation apparaît dans les valeurs qui, en cas de poursuite de la tendance du développement avec un autre nombre prédéterminé de feuilles, conduirait à un dépassement des valeurs limites.
  2. Procédé selon la revendication 1, caractérisé en ce que les valeurs individuelles s'écartant de la tendance du développement sont éliminées pour la détermination de la tendance du développement.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que les valeurs sont la position des feuilles selon un angle de machine déterminé.
  4. Procédé selon la revendication 3, caractérisé en ce que c'est la position des arêtes avant des feuilles.
  5. Procédé selon la revendication 3 ou 4, caractérisé en ce que c'est un déport latéral des feuilles.
  6. Procédé selon la revendication 5, caractérisé en ce que ce sont des défauts de traction concernant la pose de feuilles sur un taquet latéral.
  7. Procédé selon l'une quelconque des revendications 3 à 6, caractérisé en ce que c'est une position en biais des feuilles.
  8. Procédé selon l'une quelconque des revendications 1 à 7, caractérisé en ce qu'il s'applique au margeur de la machine à imprimer des feuilles.
  9. Procédé selon l'une quelconque des revendications 1 à 8, caractérisé en ce qu'un affichage des valeurs est réalisé.
  10. Procédé selon la revendication 9, caractérisé en ce que des contre-mesures sont proposées à un opérateur.
  11. Procédé selon l'une quelconque des revendications 1 à 10, caractérisé en ce que des commandes sont générées par la correction des valeurs.
  12. Dispositif pour éviter les dépassements de valeurs limites dans les machines à imprimer des feuilles, dans lequel des valeurs (1, 1', 1", 1''', ...) appropriées pour le processus d'impression concernant les feuilles individuelles sont détectées à l'aide d'au moins un détecteur et traitées de telle manière que des valeurs limites prédéterminées soient respectées, caractérisé en ce que un dispositif d'évaluation présente la tendance du développement (12) des valeurs détectées (1, 1', 1", 1"', ...) pour la prise des contre-mesures.
  13. Dispositif selon la revendication 12, caractérisé en ce que la présentation se fait sur au moins un écran (2, 2', 2",...), les valeurs (1, 1', 1", 1"', ...) d'un nombre prédéterminé d'une séquence de feuilles qui sont passées en dernier par le au moins un détecteur étant toujours complétées par la valeur (1) de la feuille en cours et étant présentées comme séquence de valeurs individuelles dans leur relation à la valeur consigne (3) et aux valeurs limites (4, 4').
  14. Dispositif selon la revendication 13, caractérisé en ce que les valeurs (1, 1', 1", 1''', ...) des feuilles individuelles sont présentées sous forme de barres (5) sur l'écran (2, 2', 2",...), l'extrémité des barres (5) indiquant la position de la valeur respective (1, 1', 1", 1''', ...) en fonction de la valeur consigne (3) et des valeurs limites (4, 4') qui sont représentées par des lignes (6).
  15. Dispositif selon la revendication 13, caractérisé en ce que les valeurs (1, 1', 1", 1''', ...) des feuilles individuelles sont présentées sur l'écran (2, 2', 2",...) sous forme d'une courbe (16) qui représente le développement dans le temps des valeurs individuelles(1, 1', 1", 1''', ...) par rapport à la valeur consigne (3) et aux valeurs limites (4, 4').
  16. Dispositif selon l'une quelconque des revendications 12 à 13, caractérisé en ce qu'un dispositif de signalisation (15) est activé par le dispositif d'évaluation dès qu'une modification, qui, en cas de poursuite de la tendance du développement (12) avec un autre nombre prédéterminé de feuilles, conduirait à un dépassement des valeurs limites, apparaît dans les valeurs (1, 1', 1", 1"', ...).
  17. Dispositif selon l'une quelconque des revendications 12 à 13, caractérisé en ce que en cas d'une modification des valeurs (1, 1', 1", 1"', ...) telle qu'en cas de poursuite de la tendance du développement (12) avec un autre nombre prédéterminé de feuilles, un dépassement de limite se produirait, un autre affichage (7) est généré par le dispositif d'évaluation pour afficher de manière lisible les contre-mesures mémorisées (14).
  18. Dispositif selon l'une quelconque des revendications 13 à 17, caractérisé en ce que plusieurs écrans (2, 2', 2", ... 7) sont disposés sur le pupitre de commande de la machine à imprimer pour présenter plusieurs types (13) de valeurs détectées (1, 1', 1", 1' ' ' , ...).
  19. Dispositif selon l'une quelconque des revendications 12 à 17, caractérisé en ce que la représentation des valeurs détectées se fait à l'aide de signaux, moyennant quoi une commande en cas de modifications des signaux représentant les valeurs (1, 1', 1", 1''', ...) telles qu'en cas de poursuite de la tendance du développement (12) avec un autre nombre prédéterminé de feuilles, un dépassement de limite se produirait, au moins un organe de réglage est commandé pour modifier la tendance du développement (12).
  20. Dispositif selon l'une quelconque des revendications 12 à 18, caractérisé en ce que le au moins un détecteur est disposé sur le margeur de feuilles et le dispositif d'évaluation sert à garantir une disposition des feuilles en respectant les valeurs limites prédéterminées (4, 4').
EP01104581A 2000-03-31 2001-03-06 Procédé et dispositif pour éviter le dépassement d'un seuil dans une machine à imprimer des feuilles Expired - Lifetime EP1138488B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10016107A DE10016107A1 (de) 2000-03-31 2000-03-31 Verfahren und Vorrichtung zur Verhinderung von Grenzwertüberschreitungen bei Bogendruckmaschinen
DE10016107 2000-03-31

Publications (3)

Publication Number Publication Date
EP1138488A1 EP1138488A1 (fr) 2001-10-04
EP1138488B1 true EP1138488B1 (fr) 2007-01-31
EP1138488B2 EP1138488B2 (fr) 2013-01-30

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ID=7637158

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EP01104581A Expired - Lifetime EP1138488B2 (fr) 2000-03-31 2001-03-06 Procédé et dispositif pour éviter le dépassement d'un seuil dans une machine à imprimer des feuilles

Country Status (5)

Country Link
US (1) US6535789B2 (fr)
EP (1) EP1138488B2 (fr)
JP (1) JP4782300B2 (fr)
AT (1) ATE353051T1 (fr)
DE (2) DE10016107A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005002004A1 (de) * 2005-01-15 2006-07-27 Landen, Franz J. Technik und Verfahrenstechnik für die Lagekontrolle bei Druckbögen

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD237282A1 (de) * 1985-05-14 1986-07-09 Polygraph Leipzig Einrichtung zur anzeige, registrierung und auswertung von ursachen fuer maschinenstillstaende
DE4005558A1 (de) † 1990-02-22 1991-09-19 Roland Man Druckmasch Verfahren zur prozessdiagnose einer rotationsdruckmaschine anhand von remissionen von vollton- und rastertonfeldern
DE4103574A1 (de) * 1991-02-06 1992-08-13 Grapho Metronic Gmbh & Co Verfahren zur bestimmung von farbfehlern
DE4140051C2 (de) † 1991-12-05 1996-11-07 Leuze Electronic Gmbh & Co Einrichtung zum Überwachen der Ankunft von Bogen am Einlaß bogenverarbeitender Maschinen
US5313253A (en) * 1992-08-17 1994-05-17 Xerox Corporation Paper path signature analysis apparatus
JP3173626B2 (ja) * 1992-11-19 2001-06-04 京セラミタ株式会社 画像形成装置用給紙装置
JPH0885671A (ja) * 1994-09-16 1996-04-02 Toshiba Corp 画像形成装置
US5528347A (en) * 1995-04-17 1996-06-18 Xerox Corporation Adaptive jam detection windows
DE19516330A1 (de) * 1995-05-04 1996-11-07 Heidelberger Druckmasch Ag Verfahren zur Einstellung der Farbgebung bei einer Druckmaschine
US6042111A (en) * 1997-08-18 2000-03-28 Xerox Corporation Method and apparatus for detecting slip in a sheet transport system
JPH11232063A (ja) * 1998-02-09 1999-08-27 Canon Inc 情報処理装置、情報処理方法及び情報処理システム

Also Published As

Publication number Publication date
DE10016107A1 (de) 2001-10-04
US6535789B2 (en) 2003-03-18
US20020140163A1 (en) 2002-10-03
DE50111986D1 (de) 2007-03-22
EP1138488A1 (fr) 2001-10-04
JP2001315996A (ja) 2001-11-13
ATE353051T1 (de) 2007-02-15
JP4782300B2 (ja) 2011-09-28
EP1138488B2 (fr) 2013-01-30

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