EP1155854A2 - Druckmaschine, insbesondere Bogenoffsetdruckmaschine - Google Patents
Druckmaschine, insbesondere Bogenoffsetdruckmaschine Download PDFInfo
- Publication number
- EP1155854A2 EP1155854A2 EP01110541A EP01110541A EP1155854A2 EP 1155854 A2 EP1155854 A2 EP 1155854A2 EP 01110541 A EP01110541 A EP 01110541A EP 01110541 A EP01110541 A EP 01110541A EP 1155854 A2 EP1155854 A2 EP 1155854A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- sheet
- printing machine
- sheet travel
- image
- evaluation unit
- 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
Links
Images
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
- B41F33/04—Tripping devices or stop-motions
- B41F33/14—Automatic control of tripping devices by feelers, photoelectric devices, pneumatic devices, or other detectors
-
- 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
Definitions
- the invention relates to a printing press, in particular one Sheet-fed offset printing machine in which a sheet to be processed passes through Sheet guiding elements and devices for influencing sheet travel in its location is guided, with a sheet monitoring device with a Devices for influencing the sheet control evaluation unit connected is.
- a sheet feeder for sheet printers is known from DE 42 27 814 A1, at which the sheets lying in a stack by targeted feeding a Air flow can be isolated.
- Photoelectric sensors are in the side Height of the floating arches arranged. The sensors emitted light rays are isolated from the side faces of the Arches reflected, the reflected light also from the sensors is detected. The difference in brightness of the reflected light becomes the Isolation and the parallelism of the isolated sheets checked. On the Parallelism of the arch is closed when that of the reflected Corresponding output signals of both sensors are the same.
- the sheet run can be varied Influences are changed.
- the invention is therefore based on the object of specifying a printing press, in which an optimal guidance of the printing material through the printing machine is also guaranteed in automated operation.
- the object is achieved in that the optically designed Sheet travel monitoring device the actual spatial position of the sheet captured over a sheet guide element and the evaluation unit actual spatial position of the arch with the help of a pattern recognition compares an ideal spatial location and evaluates this comparison controls at least one device for influencing the sheet travel.
- the advantage of the invention is that the sheet can be kept on an ideal conveyor line during the entire processing process within the printing press, since deviations from the ideal case can be recognized and corrected immediately.
- This automatic, optimized sheet guide is possible for all substrates.
- By generating the spatial representation comprehensive information about the sheet travel is obtained. Based on the pattern recognition, a target / actual value comparison of the entire sheet is possible in many individual points.
- the sheet travel monitoring device for recording the spatial position of the sheet from two image acquisition units formed, of which the first image acquisition unit is a horizontal image of the Bow and the second image acquisition unit a vertical image of the bow generated, the two image acquisition units for evaluating the of them actual images recorded at approximately the same time with a Image evaluation unit are connected, which one of these images spatial representation of the actual sheet run created and with that in a Comparing ideal sheet runs created storage unit.
- the optimal position of the sheet travel at different stations, each requiring different sheet travel can be determined and set.
- the comparison of the actual sheet run with that which is ideal for this position ensures that the production process runs smoothly. Due to the use of optical monitoring devices, there is no need to determine the paper-specific parameters such as paper weight or format or distribution of the color on each individual sheet and to preset the elements to influence the sheet travel before the start of the printing process.
- the image recording unit is a Video camera
- the image evaluation unit determining those determined by the video camera Images digitized and digitized, in the storage unit compared ideal arched spatial path.
- Video cameras can be used particularly well as image recording units, since their electronically coded images can be amplified well, can be transported as desired using suitable cables and can be processed and displayed very flexibly.
- the electronically coded images generated by the video camera can be easily processed using known methods, such as the triangulation principle. If adequate computing power is available, real-time image processing is possible, ie image processing does not lead to a delay in the display of the image.
- the spatial image of the actual sheet path generated by the image recording unit can be fed to a display device, where in addition to the actual spatial image of the sheet path, the associated ideal spatial sheet path can also be displayed.
- a display device where in addition to the actual spatial image of the sheet path, the associated ideal spatial sheet path can also be displayed.
- the display device does not have to be fixed to a specific image recording unit be linked. Rather, it is conceivable on a display device to display images from different locations one after the other, the switching in an automatic rhythm, manually selectable or depending on the situation e.g. with a serious difference between actual and ideal sheet travel can take place.
- Equipment resources can in the system according to the invention on the optical recording and Playback systems are concentrated, which benefits the image quality.
- the image evaluation unit is used to determine the ideal spatial sheet travel self-learning. For this purpose, during the printing process from the spatial representations determined by the image evaluation unit the ideal spatial arc running continuously with several actual arc runs determined.
- the image evaluation unit can in the ideal spatial sheet travel Dependency of at least one machine parameter such as Machine speed and temperature and / or a parameter of the Determine substrate such as paper, color and moisture.
- the image evaluation unit is coupled to a machine control device which is connected to Sensors for monitoring the functional status of the printing press and Control elements of the individual stations of the printing press is connected.
- the image evaluation unit advantageously gives as a function of the comparison Signals to the machine control device for setting the means of the Sheet run out. Direct additional access of the image evaluation unit to the Fans or suction elements of the printing press are therefore not necessary.
- the machine control device is preferably for independent control formed several devices for influencing the sheet travel, whereby the sheet travel can be adjusted very precisely in selected positions.
- the machine control device changes a volume flow as Blowing or suction air components designed to influence of the sheet run.
- FIG. 1 shows a printing press 1, which consists of a feeder 2, a plurality of subunits 3 to 6 designed as printing units, and a delivery arm 7.
- the path of the printing material in the configuration shown in FIG. 1 takes place in the direction of the arrow from right to left.
- Each printing unit 3 to 6 is constructed identically. For a basic understanding of the Sheet guidance in a printing press should only be done on an offset printing unit are explained.
- a stack of loose sheets, not shown, is inserted in the feeder 2.
- the sheets are separated by a targeted air flow and moved in the direction of the first offset printing unit 3.
- the incoming individual sheet is taken over by a first transfer cylinder 8, which transfers the sheet to an impression cylinder 9.
- the sheet is fed via this to the blanket cylinder 10 for printing, the blanket cylinder 10 being colored by a plate cylinder 11.
- the sheet is transported to the next printing unit 4 via a further transfer cylinder 12.
- the desired curve guidance is shown schematically by arrows.
- FIG. 2 shows monitoring of the sheet travel of the sheet 15 Sheet-fed offset printing machine 1 shown above a fan box 13.
- a Video camera 16 to control the sheet travel of the entire sheet 15 in horizontal direction and a video camera 17 for detecting sheet travel of the entire sheet 15 in the vertical direction are with a Evaluation device 18 connected, which for evaluating images of the Video cameras 16,17 is formed.
- the evaluation device 18 contains one Image evaluation unit 19. Depending on the output signals of the Image evaluation unit 19, the evaluation unit 18, the fans 14 in Fan box 13 individually controlled to change the respective air flow and so changed the position of the sheet 15 in the desired manner.
- the evaluation unit 18 is also with a control station 21 of the sheetfed offset printing press 1 connected, which a monitor 22 and a Has control device 23.
- the evaluation unit 18 consists of a Image evaluation unit 19 and a machine control device 25 Image evaluation unit 19 are those recorded by video cameras 16, 17 Images fed.
- the image evaluation device 19 is connected via an interface 24 connected to the machine control device 25.
- This machine control device 25 has a computing unit 26, which the printing process controls by evaluating signals supplied by sensors and Control signals generated for actuators.
- a sensor for determining the machine angle 20 of the offset printing unit 3 and two fans 14 shown in the fan box 13, which via an interface 27 are connected to the machine computing unit 26.
- FIG. 4 shows the basic structure of the image evaluation unit 19.
- the video cameras 16, 17 each have an optoelectronic CCD receiver unit (not shown further), which uses gray-scale analysis to provide an image grid with discrete pixels.
- This video information is digitized in a video interface 28 by means of an A / D converter and stored in an image memory 29 and processed in real time in an image processing computing unit 30 with an arithmetic logic unit.
- the digital information is again converted into an analog video signal and displayed on the monitor 22 of the control station 21 of the printing press 1.
- the ideal spatial sheet travel of a sheet 15 for selected machine angles of the offset printing unit 3 are stored.
- the ideal sheet travel can be stored by the image processing computing unit 30 either mathematically for the desired machine angle determine or empirically from the evaluation of many actual sheet runs determine.
- the Image processing arithmetic unit 30 thus compares this at the machine angle generated spatial pattern of the actual sheet run with an im Image memory 29 for this machine angle digitized stored ideal spatial arch travel. If the actual deviates from the ideal spatial arch travel is a corresponding one by the image evaluation unit 19 Signal passed to the machine control device 25.
- the as a regulator Working computing unit 26 evaluates those supplied by the image evaluation unit 19 Signals from and generates a corresponding control signal to control the Fan 14 to the actual sheet run with respect to the desired Correct sheet routing through targeted air supply.
- the fans 14 are controlled separately from the evaluation unit, whereby a local correction of the Location of the arch 15 is possible.
- the printer can run the sheet over a sheet guideway follow. Different locations of the entire sheet-fed offset printing machine can preferably be be monitored at the same time.
Landscapes
- Inking, Control Or Cleaning Of Printing Machines (AREA)
- Controlling Sheets Or Webs (AREA)
- Printing Methods (AREA)
- Paper (AREA)
- Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
- Control Or Security For Electrophotography (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Abstract
Description
Durch die Erzeugung der räumlichen Darstellung erhält man eine umfassende Information des Bogenlaufes. Auf Grund der Mustererkennung ist ein Soll - Ist - Wert - Vergleich des gesamten Bogens in vielen einzelnen Punkten möglich.
Gerade im automatisierten Betrieb der Druckmaschine werden Maschinenstandzeiten verringert und ein reibungsloser Produktionsablauf gewährleistet.
Auf Grund der Verwendung von optischen Überwachungseinrichtungen kann auf eine Ermittlung der papierspezifischen Parametern wie Papiergewicht bzw. Format oder Verteilung der Farbe auf jedem einzelnen Bogen und eine Voreinstellung der Elemente zur Beeinflussung des Bogenlaufes vor Beginn des Druckprozesses verzichtet werden.
So können die von der Videokamera erzeugten elektronisch kodierten Bilder leicht mit Hilfe bekannter Verfahren, wie beispielsweise dem Triangulationsprinzip aufbereitet werden. Steht eine angemessene Rechenleistung zur Verfügung, ist eine Echtzeitbildverarbeitung möglich, d.h. die Bildverarbeitung führt nicht zu einer Verzögerung in der Darstellung des Bildes.
Dadurch kann der Drucker die kritischen Bereiche des Druckprozesses selbständig überwachen und alle für ihn relevanten Informationen entnehmen. Ein manuelles Eingreifen in den Funktionsablauf ist bei schwerwiegenden Störungen jederzeit möglich.
- Figur 1:
- Prinzipdarstellung einer Bogenoffsetdruckmaschine
- Figur 2:
- optische Überwachung des Bogenlaufes
- Figur 3:
- Steuereinrichtung der Druckmaschine
- Figur 4:
- Auswerteeinrichtung zur Bildverarbeitung
Der Weg des Bedruckstoffes bei der in der Figur 1 dargestellten Konfiguration erfolgt in Richtung des Pfeiles von rechts nach links.
In diesem Offsetdruckwerk 3 wird der ankommende vereinzelte Bogen von einem ersten Transferzylinder 8 übernommen, welcher den Bogen an einen Gegendruckzylinder 9 weitergibt. Über diesen wird der Bogen dem Gummituchzylinder 10 zum Druck zugeführt, wobei der Gummituchzylinder 10 von einem Plattenzylinder 11 eingefärbt wird. Nach Passieren des Gummituchzylinders 10 wird der Bogen über einen weiteren Transferzylinder 12 zum nächsten Druckwerk 4 transportiert.
Die gewünschte Bogenführung ist dabei durch Pfeile schematisch dargestellt.
Die Videokameras 16 , 17 weisen jeweils eine nicht weiter dargestellte optoelektronische CCD-Empfängereinheit auf, welche mittels einer Graustufenanalyse ein Bildraster mit diskreten Bildpunkten liefert. Diese Videoinformation wird in einem Video-Interface 28 mittels eines A/D-Wandlers digitalisiert und in einem Bildspeicher 29 abgelegt und in einer Bildverarbeitungsrecheneinheit 30 mit einer Arithmetik-Logik-Einheit in Echtzeit verarbeitet.
In einem, einen D/A-Wandler enthaltenden weiteren Video-Interface 31 wird die digitale Information wieder in ein analoges Videosignal überführt und auf dem Monitor 22 des Leitstandes 21 der Druckmaschine 1 dargestellt.
- 1
- Druckmaschine
- 2
- Anleger
- 3
- Druckwerk
- 4
- Druckwerk
- 5
- Druckwerk
- 6
- Druckwerk
- 7
- Ausleger
- 8
- Transferzylinder
- 9
- Gegendruckzylinder
- 10
- Gummituchzylinder
- 11
- Plattenzylinder
- 12
- Transferzylinder
- 13
- Lüfterkasten
- 14
- Lüfter
- 15
- Bogen
- 16
- Videokamera
- 17
- Videokamera
- 18
- Auswerteeinheit
- 19
- Bildauswerteeinheit
- 20
- Sensor für Maschinenwinkel
- 21
- Leitstand
- 22
- Anzeigeeinrichtung
- 23
- Bedieneinrichtung
- 24
- Schnittstelle
- 25
- Maschinensteuereinrichtung
- 26
- Recheneinheit
- 27
- Schnittstelle
- 28
- Video-Interface
- 29
- Digitaler Bildspeicher
- 30
- Bildverarbeitungsrecheneinheit
- 31
- Video-Interface
Claims (10)
- Druckmaschine, insbesondere Bogenoffsetdruckmaschine, bei welcher ein zu bearbeitender Bogen durch Bogenführungselemente und Einrichtungen zur Beeinflussung des Bogenlaufes in seiner Lage geführt ist, wobei eine Bogenlaufüberwachungseinrichtung mit einer die Einrichtungen zur Beeinflussung des Bogenlaufes steuernden Auswerteeinheit verbunden ist, dadurch gekennzeichnet, daß die optisch ausgebildete Bogenlaufüberwachungseinrichtung (16, 17) die tatsächliche räumliche Lage des Bogens (15) über einem Bogenführungselement (13) erfaßt und die Auswerteeinheit (18) die tatsächliche räumliche Lage des Bogens (15) mit einer idealen räumlichen Lage mit Hilfe einer Mustererkennung vergleicht und in Auswertung dieses Vergleiches mindestens eine Einrichtung zur Beeinflussung des Bogenlaufes (14) ansteuert.
- Druckmaschine nach Anspruch 1 dadurch gekennzeichnet, dass die Bogenlaufüberwachungseinrichtung zur Erfassung der räumlichen Lage des Bogens (15) von zwei Bildaufnahmeeinheiten (16,17) gebildet ist, von denen die erste Bildaufnahmeeinheit (16) eine horizontale Abbildung des Bogens (15) und die zweite Bildaufnahmeeinrichtung (17) eine vertikale Abbildung des Bogens erzeugt, wobei die beiden Bildaufnahmeeinheiten (16, 17) zur Auswertung der von ihnen annähernd zeitgleich aufgenommenen tatsächlichen Abbildungen mit einer Bildauswerteeinheit (19) verbunden sind, welche aus diesen Abbildungen eine räumliche Darstellung des tatsächlichen Bogenlaufes erstellt und mit dem in einer Speichereinheit (29) abgelegten idealen räumlichen Bogenlauf vergleicht.
- Druckmaschine nach Anspruch 2 dadurch gekennzeichnet, daß die Bildaufnahmeeinheit (16,17) eine Videokamera ist und die Bildauswerteeinheit (19) die von der Videokamera ermittelten Bilder digitalisiert und mit einem digitalisierten, in einer Speichereinheit (29) abgelegten idealen Bogenlauf vergleicht.
- Druckmaschine nach Anspruch 2 oder 3 dadurch gekennzeichnet, daß die von der Bildaufnahmeeinheit (16,17) erzeugte räumliche Darstellung des tatsächlichen Bogenlaufes einer Anzeigeeinrichtung (22) zuführbar ist, wo neben der räumlichen Darstellung des tatsächlichen Bogenlaufes gleichzeitig der zugehörige ideale räumliche Bogenlauf darstellbar ist.
- Druckmaschine nach Anspruch 4 dadurch gekennzeichnet, dass die Bildauswerteeinheit (19) zur Bestimmung des idealen räumlichen Bogenlaufes selbstlernend ausgebildet ist.
- Druckmaschine nach Anspruch 5 dadurch gekennzeichnet, dass die Bildauswerteeinheit (19) den idealen räumlichen Bogenlauf in Abhängigkeit mindestens eines Maschinenparameters bestimmt.
- Druckmaschine nach Anspruch 5 dadurch gekennzeichnet, dass die Bildauswerteeinheit (19) den idealen räumlichen Bogenlauf in Abhängigkeit mindestens eines Parameters des Bedruckstoffes bestimmt.
- Druckmaschine nach Anspruch 2 dadurch gekennzeichnet, dass die Bildauswerteeinheit (19) in Abhängigkeit des Vergleichs Signale an eine Maschinensteuereinrichtung (25) zur Einstellung der Mittel zur Beeinflussung des Bogenlaufes (14) ausgibt.
- Druckmaschine nach Anspruch 8 dadurch gekennzeichnet, dass die Maschinensteuereinrichtung (25) zur unabhängigen Ansteuerung mehrerer Einrichtungen zur Beeinflussung des Bogenlaufes (14) ausgebildet ist.
- Druckmaschine nach Anspruch 8 oder 9 dadurch gekennzeichnet, dass die Maschinensteuereinrichtung (25) einen Volumenstrom der als Blas- oder Saugluftkomponenten ausgebildeten Einrichtungen zur Beeinflussung des Bogenlaufes (14) verändert.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE20008731U DE20008731U1 (de) | 2000-05-17 | 2000-05-17 | Druckmaschine, insbesondere Bogenoffsetdruckmaschine |
DE20008731U | 2000-05-17 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1155854A2 true EP1155854A2 (de) | 2001-11-21 |
EP1155854A3 EP1155854A3 (de) | 2002-12-18 |
EP1155854B1 EP1155854B1 (de) | 2006-03-01 |
Family
ID=7941547
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01110541A Expired - Lifetime EP1155854B1 (de) | 2000-05-17 | 2001-04-28 | Druckmaschine, insbesondere Bogenoffsetdruckmaschine |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1155854B1 (de) |
AT (1) | ATE318711T1 (de) |
DE (2) | DE20008731U1 (de) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7481429B2 (en) | 2004-12-21 | 2009-01-27 | Heidelberger Druckmaschinen Ag | Method for the cyclic conveyance of sheets through a printing machine |
DE10312162B4 (de) * | 2003-03-19 | 2009-12-10 | Koenig & Bauer Aktiengesellschaft | Verfahren und Vorrichtung zur Regelung der Bogenlage |
EP2520430A1 (de) | 2011-05-04 | 2012-11-07 | Heidelberger Druckmaschinen AG | Verfahren zur Ermittlung von Einstellfehlern in einer Bogendruckmaschine |
DE102017208515A1 (de) * | 2017-05-19 | 2018-11-22 | Koenig & Bauer Ag | Verfahren zum Betreiben einer bogenverarbeitenden Maschine und bogenverarbeitende Maschine |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1249415A3 (de) * | 2001-04-14 | 2004-02-04 | NexPress Solutions LLC | Verfahren und Einrichtung zur Messung von Positionen von durchlaufenden Bogen |
DE102005056544B4 (de) * | 2004-12-21 | 2016-06-02 | Heidelberger Druckmaschinen Ag | Verfahren zur zyklischen Förderung von Bogen durch eine drucktechnische Maschine |
JP2009285909A (ja) * | 2008-05-28 | 2009-12-10 | Komori Corp | 両面印刷機のシート状物監視装置 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60125506A (ja) * | 1983-12-09 | 1985-07-04 | Toho Seiki Kk | 印刷物検査装置 |
EP0576824A1 (de) * | 1992-05-30 | 1994-01-05 | KOENIG & BAUER-ALBERT AKTIENGESELLSCHAFT | Druck-Qualitätskontrolleinrichtung für eine Schön- und Widerdruck-Rotationsdruckmaschine |
-
2000
- 2000-05-17 DE DE20008731U patent/DE20008731U1/de not_active Expired - Lifetime
-
2001
- 2001-04-28 DE DE50109030T patent/DE50109030D1/de not_active Expired - Lifetime
- 2001-04-28 EP EP01110541A patent/EP1155854B1/de not_active Expired - Lifetime
- 2001-04-28 AT AT01110541T patent/ATE318711T1/de active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60125506A (ja) * | 1983-12-09 | 1985-07-04 | Toho Seiki Kk | 印刷物検査装置 |
EP0576824A1 (de) * | 1992-05-30 | 1994-01-05 | KOENIG & BAUER-ALBERT AKTIENGESELLSCHAFT | Druck-Qualitätskontrolleinrichtung für eine Schön- und Widerdruck-Rotationsdruckmaschine |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 009, no. 285 (P-404), 12. November 1985 (1985-11-12) & JP 60 125506 A (TOUHOU SEIKI KK), 4. Juli 1985 (1985-07-04) * |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10312162B4 (de) * | 2003-03-19 | 2009-12-10 | Koenig & Bauer Aktiengesellschaft | Verfahren und Vorrichtung zur Regelung der Bogenlage |
US7481429B2 (en) | 2004-12-21 | 2009-01-27 | Heidelberger Druckmaschinen Ag | Method for the cyclic conveyance of sheets through a printing machine |
EP2520430A1 (de) | 2011-05-04 | 2012-11-07 | Heidelberger Druckmaschinen AG | Verfahren zur Ermittlung von Einstellfehlern in einer Bogendruckmaschine |
DE102011100413A1 (de) * | 2011-05-04 | 2012-11-08 | Heidelberger Druckmaschinen Ag | Verfahren zur Ermittlung von Einstellfehlern in einer Bogendruckmaschine |
DE102017208515A1 (de) * | 2017-05-19 | 2018-11-22 | Koenig & Bauer Ag | Verfahren zum Betreiben einer bogenverarbeitenden Maschine und bogenverarbeitende Maschine |
Also Published As
Publication number | Publication date |
---|---|
DE20008731U1 (de) | 2000-08-03 |
EP1155854B1 (de) | 2006-03-01 |
EP1155854A3 (de) | 2002-12-18 |
DE50109030D1 (de) | 2006-04-27 |
ATE318711T1 (de) | 2006-03-15 |
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