EP1155854A2 - Machine d'impression, en particulier machine d'impression offset pour feuilles - Google Patents

Machine d'impression, en particulier machine d'impression offset pour feuilles Download PDF

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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
Application number
EP01110541A
Other languages
German (de)
English (en)
Other versions
EP1155854A3 (fr
EP1155854B1 (fr
Inventor
Arno Wührl
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 EP1155854A2 publication Critical patent/EP1155854A2/fr
Publication of EP1155854A3 publication Critical patent/EP1155854A3/fr
Application granted granted Critical
Publication of EP1155854B1 publication Critical patent/EP1155854B1/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
    • 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)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Control Or Security For Electrophotography (AREA)
  • Paper (AREA)
  • Printing Methods (AREA)
EP01110541A 2000-05-17 2001-04-28 Machine d'impression, en particulier machine d'impression offset pour feuilles Expired - Lifetime EP1155854B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE20008731U 2000-05-17
DE20008731U DE20008731U1 (de) 2000-05-17 2000-05-17 Druckmaschine, insbesondere Bogenoffsetdruckmaschine

Publications (3)

Publication Number Publication Date
EP1155854A2 true EP1155854A2 (fr) 2001-11-21
EP1155854A3 EP1155854A3 (fr) 2002-12-18
EP1155854B1 EP1155854B1 (fr) 2006-03-01

Family

ID=7941547

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01110541A Expired - Lifetime EP1155854B1 (fr) 2000-05-17 2001-04-28 Machine d'impression, en particulier machine d'impression offset pour feuilles

Country Status (3)

Country Link
EP (1) EP1155854B1 (fr)
AT (1) ATE318711T1 (fr)
DE (2) DE20008731U1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
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 (fr) 2011-05-04 2012-11-07 Heidelberger Druckmaschinen AG Procédé de détermination d'erreurs de réglage dans une presse à feuilles
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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1249415A3 (fr) * 2001-04-14 2004-02-04 NexPress Solutions LLC Procécé et dispositif pour mesurer des positions de feuilles en mouvement continu
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)

* Cited by examiner, † Cited by third party
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 (fr) * 1992-05-30 1994-01-05 KOENIG & BAUER-ALBERT AKTIENGESELLSCHAFT Dispositif de contrôle de la qualité d'impression pour machine d'impression rotative recto-verso

Patent Citations (2)

* Cited by examiner, † Cited by third party
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 (fr) * 1992-05-30 1994-01-05 KOENIG & BAUER-ALBERT AKTIENGESELLSCHAFT Dispositif de contrôle de la qualité d'impression pour machine d'impression rotative recto-verso

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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 (fr) 2011-05-04 2012-11-07 Heidelberger Druckmaschinen AG Procédé de détermination d'erreurs de réglage dans une presse à feuilles
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
EP1155854A3 (fr) 2002-12-18
DE20008731U1 (de) 2000-08-03
EP1155854B1 (fr) 2006-03-01
ATE318711T1 (de) 2006-03-15
DE50109030D1 (de) 2006-04-27

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