EP0576801A1 - Dispositif et procédé pour détecter une feuille - Google Patents

Dispositif et procédé pour détecter une feuille Download PDF

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Publication number
EP0576801A1
EP0576801A1 EP93107251A EP93107251A EP0576801A1 EP 0576801 A1 EP0576801 A1 EP 0576801A1 EP 93107251 A EP93107251 A EP 93107251A EP 93107251 A EP93107251 A EP 93107251A EP 0576801 A1 EP0576801 A1 EP 0576801A1
Authority
EP
European Patent Office
Prior art keywords
sheet
area
paper
front marks
scanning
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
EP93107251A
Other languages
German (de)
English (en)
Other versions
EP0576801B1 (fr
Inventor
Heiner Luxem
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
Original Assignee
Heidelberger 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 Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP0576801A1 publication Critical patent/EP0576801A1/fr
Application granted granted Critical
Publication of EP0576801B1 publication Critical patent/EP0576801B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H7/00—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles
    • B65H7/02—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or 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
    • B41F21/04—Grippers
    • B41F21/05—In-feed grippers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/50—Occurence
    • B65H2511/51—Presence
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/50—Occurence
    • B65H2511/51—Presence
    • B65H2511/514—Particular portion of element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2553/00—Sensing or detecting means
    • B65H2553/40—Sensing or detecting means using optical, e.g. photographic, elements
    • B65H2553/41—Photoelectric detectors
    • B65H2553/412—Photoelectric detectors in barrier arrangements, i.e. emitter facing a receptor element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/13—Parts concerned of the handled material
    • B65H2701/131—Edges
    • B65H2701/1311—Edges leading edge

Definitions

  • the invention relates to a measuring device for sheet detection in the area of the front marks of a paper sheet processing machine, with means for accelerating the sheets aligned along their front edge to a higher speed for transfer to a paper sheet processing unit, and to a method for sheet detection in the area of the front marks of a paper sheet processing machine Machine with means for accelerating the sheets aligned along their front edge to an increased speed required for transfer to the paper sheet processing unit and a pre-gripper device in paper sheet processing machines, in which paper sheets aligned with front marks along their front edge are picked up by pre-grippers and transferred to a paper processing unit by the Pioneers are accelerated.
  • the time available for acceleration is further greatly reduced by the response time of the system, as well as by a sheet installation securing time.
  • the sheet attachment safeguarding time is the period of time that passes before it is ensured that a sheet of paper is present on the front marks for takeover by the pre-grippers.
  • To detect the safe system it is known to place a photoelectric sensor device upstream and downstream of the front mark.
  • the sensor devices are located below the conveyor level and cover a wide area above the sensor position. The sensors can only determine for themselves that any sheet of paper is in a comparatively wide area above the sensor. Thus, the sensor upstream of the front marks can only recognize that part of a sheet of paper is in the area in front of the front mark.
  • the upstream sensor cannot determine whether it is a sheet of paper lying against the front marks or a sheet of paper shot beyond the front mark or even the end of a previous sheet of paper in the case of long sheets of paper.
  • Only the second sensor which is located downstream of the front mark, can provide the information if it does not register a sheet within a predetermined time window, whether the sheet registered by the first sensor is in the position of the machine and ready for acceptance by the pre-grippers.
  • the predetermined time window to be granted to the second sensor undesirably limits the sheet length to be processed.
  • Sheets of paper can only be processed with a length that, after leaving the second sensor through the sheet trailing edge of a previous sheet, enables the second sensor over the specified time window and the time until the sensor is covered by the leading edge of the next of the To anticipate non-coverage of bow-sponsored bows.
  • the evaluation of the signals from two sensors also represents a delay to be calculated for the acceleration time.
  • the invention is based on the problem, a measuring device for sheet detection in the area of the front marks of a paper sheet processing machine and a method for sheet detection in the area of the front marks of a paper sheet processing machine and a gripper device in paper sheet processing machines in which paper sheets aligned with front marks along their front edge are picked up by pre-grippers and be accelerated by the forerunners for handover to a paper processing unit in such a way that the time available for accelerating the paper sheets is increased.
  • the pre-gripper device according to the features of claim 10 also enables quick takeover by the pre-gripper.
  • claims 4 and 9 enable a particularly simple, production-technically favorable, easy-to-assemble, low-maintenance and inexpensive design, since with the upper gripper finger of a gripper an already existing moving part intended for the transfer and acceleration of the sheet is used for the kinematics of the moving measuring part can be.
  • the features of claim 5 enable a particularly preferred measuring device, since only one electrically actuated sensor part needs to be fixed stationary once.
  • the stationary part is easy to maintain and can be controlled electrically.
  • the feature of claim 6 represents a further embodiment.
  • Fig. 1 shows schematically the feed table 1 of a sheet-fed offset printing press, via which paper sheets 20 are placed in a known, not shown manner for aligning the leading edge of the sheet on pivotally attached front marks 6 on a shaft, which is not shown in the machine side frames.
  • the sheets 20, which are aligned along their front edge of the sheet on the front marks 6, rest with their front area on the pre-gripper arm 3 which is pivotably mounted in the machine side frames.
  • a gripper finger 4 is pivotally mounted in the swivel arm 3.
  • the eye of a reflection photo sensor 11 is installed in the support surface 9 of the gripper support and detects the gap area to the underside 8 of the gripper finger 4 vertically upwards.
  • the sensor can thus clearly recognize whether there is a paper sheet between the underside of the gripper and the sensor.
  • the pre-gripper finger is driven in such a way that it only extends over such an angular range from the contact surface 9 Can move gripper pad that in the sheet contact position of the front mark and the pre-gripper, the contact surface 7 of the front mark penetrates the entire gap area.
  • the mode of operation is that a sheet of paper introduced to the front mark between the support finger 4 and the gripper support 5 is brought up to the front marks by the conveying means and is aligned there.
  • a linearly increasing curve 12 results for the movement of the leading edge of the curve for this conveying area.
  • the sensor 11 reports the arrival of the sheet after a short sensor reaction time 13.
  • the leading edge of the sheet is accelerated over a period of time t 21 to the point of transfer 15 in FIG. 4 to a transfer cylinder 2 according to FIG. 1.
  • Transfer cylinder 2 is in a known manner in the machine side frames stored and driven.
  • the sheet is transferred from transfer cylinder 2 to the gripper bar in the impression cylinder.
  • the gripper finger 4 is pivoted slightly away from the gripper pad 5.
  • the front mark 6 and then the pre-gripper arm 3 are pivoted into the contact position.
  • the gripper finger 4 is pivoted down onto the adjacent sheet 20 and from the gripper finger 4 and from the gripper support 5 gripped.
  • the pre-gripper arm 13 pivots again below the table top 1 for the sheet transfer to the transfer cylinder 2.
  • Very long sheets of paper lie on the front marks on the gripper support fingers 4 when the next sheet 20 arrives. Since they are outside the distance covered by the sensors, they are not detected by the sensors. As a result, it is possible, as shown in FIG. 4, to already begin to accelerate the front edge of an aligned sheet according to acceleration line 16, although the back edge of the previous sheet according to movement line 17 in FIG. 4 is still in the effective range of the sensor. Since this sensor device only registers paper sheets that are located in the gap area between the gripper fingers in the safe contact area of the front marks 6, overshoots that shoot over the front mark are also not registered.

Landscapes

  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Controlling Sheets Or Webs (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
EP93107251A 1992-07-01 1993-05-05 Dispositif et procédé pour détecter une feuille Expired - Lifetime EP0576801B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4221578 1992-07-01
DE4221578A DE4221578A1 (de) 1992-07-01 1992-07-01 Vorrichtung und Verfahren zur Bogenerfassung

Publications (2)

Publication Number Publication Date
EP0576801A1 true EP0576801A1 (fr) 1994-01-05
EP0576801B1 EP0576801B1 (fr) 1996-10-02

Family

ID=6462230

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93107251A Expired - Lifetime EP0576801B1 (fr) 1992-07-01 1993-05-05 Dispositif et procédé pour détecter une feuille

Country Status (5)

Country Link
US (1) US5390908A (fr)
EP (1) EP0576801B1 (fr)
JP (1) JP2851515B2 (fr)
AT (1) ATE143646T1 (fr)
DE (2) DE4221578A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0668161B1 (fr) * 1994-02-17 1998-06-10 De La Rue Giori S.A. Dispositif pour le transfert de feuilles individuelles sur le cylindre imprimeur d'une machine d'impression rotative de feuilles
DE19600793C2 (de) * 1996-01-11 1999-12-02 Heidelberger Druckmasch Ag Vorrichtung zum Ausrichten von Bogen auf dem Anlegetisch einer Bogendruckmaschine
DE19653487C1 (de) * 1996-12-20 1998-07-23 Siemens Nixdorf Inf Syst Belegdruckeinrichtung mit Belegsammelstation
DE19831976B4 (de) * 1998-07-16 2010-07-29 Heidelberger Druckmaschinen Ag Vorrichtung zum Zuführen von Bogen zu einer Bogen verarbeitenden Maschine
US6203084B1 (en) 1999-02-04 2001-03-20 Inscerco Mfg., Inc. Gripper arm assembly
DE10254330A1 (de) * 2001-12-20 2003-07-10 Heidelberger Druckmasch Ag Vorrichtung zum Ausrichten von Bogen auf einem Anleger einer Bogen verarbeitenden Maschine, insbesondere Druckmaschine
DE102009008776B4 (de) * 2008-03-17 2021-05-27 Heidelberger Druckmaschinen Ag Vorrichtung zum Ausrichten von Bogen an Anschlägen
US8714087B2 (en) * 2011-09-13 2014-05-06 Hewlett-Packard Indigo B.V. Image forming apparatuses and methods thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE835749C (de) * 1950-10-27 1952-04-03 Faber & Schleicher A G Abfuehlvorrichtung fuer bogenverarbeitende Maschinen, insbesondere Druckmaschinen
GB844397A (en) * 1957-05-23 1960-08-10 Frankfuruter Maschb Ag Vorm Po Improvements in or relating to sheet-feeding mechanism
US3169476A (en) * 1962-11-30 1965-02-16 Linotype Machinery Ltd Photoelectric no sheet trip device for a printing press
US3647205A (en) * 1970-05-15 1972-03-07 Polygraph Leipzig Method and apparatus for feeding of sheets fittingly aligned to a machine
DE2738801A1 (de) * 1976-09-03 1978-03-09 Polygraph Leipzig Kapazitive kontroll- und auswerteeinrichtung

Family Cites Families (19)

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Publication number Priority date Publication date Assignee Title
DD64977A (fr) *
US1984588A (en) * 1932-04-19 1934-12-18 Liebusch Max Sheet feeding apparatus
GB740372A (en) * 1952-12-06 1955-11-09 Druckmaschinenwerk Planeta Vvb Sheet-registering devices for overlapping stream feeds
US2926909A (en) * 1959-03-17 1960-03-01 Miehle Goss Dexter Inc Sheet transfer mechanism
DE1126411B (de) * 1961-01-28 1962-03-29 Maschf Augsburg Nuernberg Ag Bogenanlegevorrichtung
DE1167853B (de) * 1962-12-20 1964-04-16 Linotype Machinery Ltd Kontrollvorrichtung an bogenverarbeitenden Maschinen zum Abschalten der Maschine beim Auftreten von Fehlbogen
DE1217980B (de) * 1964-07-29 1966-06-02 Gerhard Ritzerfeld Rotationsvervielfaeltiger zum Abdrucken von Druckformen auf Blaetter, Karten od. dgl.
DE2144649C3 (de) * 1971-09-07 1974-10-24 Weitmann & Konrad, 7023 Echterdingen Reflexionsmeßkopf zur Abtastung und Erkennung von reflektierenden Gegenständen
DD96054A1 (fr) * 1972-04-20 1973-03-12
GB1392913A (en) * 1972-05-25 1975-05-07 Svecia Silkscreen Maskiner Ab Silkscreen printing machine
JPS59215Y2 (ja) * 1979-12-20 1984-01-06 小森印刷機械株式会社 印刷機の不正給紙検出装置
DE3111952A1 (de) * 1981-03-23 1982-10-07 Francotyp Gmbh, 1000 Berlin Verfahren zur kontrolle der vereinzelung und von fehlstellen bei der zufuehrung von blattfoermigem gut
DE3301722C2 (de) * 1983-01-20 1985-03-07 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Verfahren und Vorrichtung zur paßgerechten Zuführung von Bogen an bogenverarbeitenden Maschinen
JPS59215U (ja) * 1983-04-28 1984-01-05 株式会社東芝 開閉制御装置
IT1188121B (it) * 1986-04-30 1987-12-30 Nebiolo Spa Procedimento per trasferire un foglio di carta da una tavola su un cilindro stampa in una macchina da stampa e gruppo pinza oscillante per eseguire tale procedimento
JPS63132734U (fr) * 1987-02-20 1988-08-30
JPS6449644A (en) * 1987-08-21 1989-02-27 Toppan Printing Co Ltd Metal sheet offset press
DE4113478C2 (de) * 1991-04-25 1994-05-05 Heidelberger Druckmasch Ag Bogenkontrollvorrichtung an einem bogenfördernden Zylinder einer Druckmaschine
DE4116409C2 (de) * 1991-05-18 1995-01-05 Roland Man Druckmasch Seitenmarken- und Überziehkontrolle einer Rotations-Bogendruckmaschine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE835749C (de) * 1950-10-27 1952-04-03 Faber & Schleicher A G Abfuehlvorrichtung fuer bogenverarbeitende Maschinen, insbesondere Druckmaschinen
GB844397A (en) * 1957-05-23 1960-08-10 Frankfuruter Maschb Ag Vorm Po Improvements in or relating to sheet-feeding mechanism
US3169476A (en) * 1962-11-30 1965-02-16 Linotype Machinery Ltd Photoelectric no sheet trip device for a printing press
US3647205A (en) * 1970-05-15 1972-03-07 Polygraph Leipzig Method and apparatus for feeding of sheets fittingly aligned to a machine
DE2738801A1 (de) * 1976-09-03 1978-03-09 Polygraph Leipzig Kapazitive kontroll- und auswerteeinrichtung

Also Published As

Publication number Publication date
EP0576801B1 (fr) 1996-10-02
JPH0664784A (ja) 1994-03-08
ATE143646T1 (de) 1996-10-15
US5390908A (en) 1995-02-21
DE4221578A1 (de) 1994-01-05
JP2851515B2 (ja) 1999-01-27
DE59304023D1 (de) 1996-11-07

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