EP0386470A2 - Dispositif pour demander la longueur d'une feuille dans une machine de traitement de feuilles, notamment dans une machine rotative à imprimer pour feuilles - Google Patents

Dispositif pour demander la longueur d'une feuille dans une machine de traitement de feuilles, notamment dans une machine rotative à imprimer pour feuilles Download PDF

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Publication number
EP0386470A2
EP0386470A2 EP90102182A EP90102182A EP0386470A2 EP 0386470 A2 EP0386470 A2 EP 0386470A2 EP 90102182 A EP90102182 A EP 90102182A EP 90102182 A EP90102182 A EP 90102182A EP 0386470 A2 EP0386470 A2 EP 0386470A2
Authority
EP
European Patent Office
Prior art keywords
sheet
suction
suction air
query
sheets
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
EP90102182A
Other languages
German (de)
English (en)
Other versions
EP0386470A3 (fr
EP0386470B1 (fr
Inventor
Arno Wirz
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 EP0386470A2 publication Critical patent/EP0386470A2/fr
Publication of EP0386470A3 publication Critical patent/EP0386470A3/fr
Application granted granted Critical
Publication of EP0386470B1 publication Critical patent/EP0386470B1/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
    • B65H7/06—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 responsive to presence of faulty articles or incorrect separation or feed
    • 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
    • B65H7/18—Modifying or stopping actuation of separators
    • 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
    • B65H2511/10—Size; Dimensions
    • 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
    • B65H2515/00—Physical entities not provided for in groups B65H2511/00 or B65H2513/00
    • B65H2515/30—Forces; Stresses
    • B65H2515/34—Pressure, e.g. fluid pressure
    • 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
    • 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
    • B65H2701/1313—Edges trailing edge

Definitions

  • the invention relates to a device for interrogating the length of a sheet in a sheet-processing machine, in particular a sheet-fed rotary printing press, with features according to the preamble of claim 1.
  • Such a device is known from DE-PS 26 21 250 on a sheet transfer drum of a sheet-fed rotary printing press for perfecting.
  • grippers for grasping the leading edge of a sheet and also suction grippers connected to a source of suction air for grasping the trailing edge of a leading sheet are arranged in a row along the wall of the channel, two suction grippers being offset relative to the row opposite to the transport direction of the sheet and the suction pads have a pressure switch in their connecting line, so that the suction nozzles also serve as interrogation nozzles in order to detect sheets of insufficient length, sheets with folded corners at the rear edge and other format errors and to be able to switch off subsequent printing units.
  • the known device for detecting short sheets, which are dragged by the storage drum in front of a reversing drum in a rotary printing press for perfecting and printing, for example as a result of electrostatic charging or the like, is not suitable, which likewise causes considerable consequential damage.
  • the problem caused by a sheet that is too short becomes particularly critical because the time between the detection of the error on the sheet and the possibly triggered pressure cut-off is very short and may no longer be sufficient to run in a sheet that is too short or otherwise faulty in the printing unit or to prevent printing on the printing cylinders.
  • the invention has for its object to design a device for interrogation of sheet length in such a way that sheets that are too short for the passage through the printing units or unsuitable for printing due to other errors are recognized even before entering the first printing unit, so that the machine can already be switched off before such a sheet is fed from the feeder to the first printing unit.
  • Such The device should also enable retrofitting to existing machines.
  • the invention provides training with the features according to the characterizing part of patent claim 1.
  • Suction air measuring nozzles in the arrangement according to the invention already scan the sheets to be printed on the sheet stack, which has an advantageous effect that this query occurs when the top sheet is lifted off the sheet stack in the feeder and briefly remains in a stop position with the leading edge before the means of transport Take over the sheet and transport it over the feed table against the front marks.
  • sheets of a ream that is too short and a ream offset that is no longer permissible can also be recognized at an early stage, and consequent malfunctions can be avoided.
  • the device designed according to the invention takes effect immediately above the sheet stack in the feeder, so that the machine is switched off before the faulty sheet arrives in the first printing unit, so that this design provides high security even with fast-running machines.
  • the features of the invention find an advantageous application in a feeder with a suction head which has suction nozzles, in particular lifting suction devices, the suction opening of which is directed approximately perpendicularly to the edge region at the trailing edge of the top sheet in the sheet stack and is connected to a source of suction air.
  • At least one existing vacuum cleaner is retrofitted with a suction air measuring nozzle in the configuration according to the invention and with it Interrogation hole to the trailing edge of the sheet in relation to the suction holes of the already existing suction cups is aligned offset to the trailing edge of the top sheet in the sheet stack, whereby an adjustment option in the direction of sheet transport is advantageous in order to align the interrogation hole to the exact sheet format or to an arc length within the still permissible tolerance limits to align.
  • the sheets which may have been loosened by loosening blowers are lifted vertically from the sheet stack individually by the suction nozzles of the suction head before the horizontal sheet transport in the feeder begins.
  • Sheets identified as defective, for example sheets that are too short lead to immediate shutdown of the feeder via differential pressure measuring valves, so that the defective sheet remains on the sheet stack and can be removed. This avoids consequential damage from such defective sheets in the printing units of the machine.
  • the differential pressure measuring valve can be arranged in the suction air line upstream or downstream of the rotary valve for the suction air control.
  • the subclaims 3 to 8 contain advantageous refinements of the features of the invention and include features for retrofitting existing suction cups in suction heads of the feeder of sheet-fed rotary printing presses with a suction measuring nozzle for querying sheet length in the feeder in sheet-fed rotary printing presses, e.g. by exchanging existing suction cups for suction cups with an additional query hole that is aligned with the rear edge of the top sheet in the sheet stack.
  • Suction-measuring nozzles according to the invention are advantageously provided in a row in order to also include oblique ones Detect sheets or sheets with folded corners in the feeder.
  • the sheet length query of sheets that are too short for the passage through the printing units or unsuitable for printing due to other errors takes place before the entry into the first printing unit, so that printing can be switched off before such a sheet is fed from the feeder to the first printing unit is fed.
  • sheets that are too short can also be determined in other sheet-processing machines in order to trigger control processes which prevent the processing of such sheets.
  • Suction air measuring nozzles are provided in the feeder for the sheet length inquiry, which are directed towards the rear edge of the uppermost sheet of the sheet stack in the feeder, from which the machine lifts the sheets individually and feeds them for processing.
  • the exemplary embodiment shows a sheet-fed rotary printing machine in which a suction head 2 is located in the feeder at a certain distance above the sheet stack 1, on the lifting suction device 4 or other suction air nozzles for lifting the top sheet 3 from the sheet stack 1 and transporting it to the feeder are arranged.
  • the application of suction air to a suction air source (not shown in the drawing) is controlled by a rotary valve 5.
  • several such suction cups 4 are arranged in the rear area of the sheet stack 1 and on the sheet sides.
  • these lifting suction devices 4 When suction air is applied, these lifting suction devices 4 lift the top sheet 3, which has already been loosened, from the sheet stack 1, so that supporting air can be blown under the sheet and the sheet abuts the front edge against stops and remains briefly in this position before it is transported to the feeder becomes.
  • at least one, but advantageously a plurality of suction air measuring nozzles 8 are directed onto the trailing edge of the sheet with their query bore 9 in such a way that the query bore is closed at the normal length of the sheet being lifted.
  • the suction air supply to the suction air measuring nozzles is also controlled via the rotary valve 5.
  • a suction air measuring nozzle 8 can be designed as an integral part of a lifting suction device 4, so that a lifting suction device 4 or more lifting suction devices 4 can be replaced by a lifting suction device which, in addition to its suction openings, also has one or more query bores 9 which point to the trailing edge of the sheet Sheet stack 1 lifted sheet 3 are directed, as can be seen from the schematic representation in Figures 1 and 2.
  • FIG. 2 shows that either some of the usual suction cups 4 are designed with suction air measuring nozzles 8 for lifting the top sheet or additional suction air measuring nozzles 8 can be provided in addition to the conventional suction cups 4 for lifting the top sheet.
  • the suction air measuring nozzles 8 shown in FIG. 2 each have two query bores 9, which are directed towards the rear edge of the uppermost sheet in the sheet stack. The alignment of the query bores 9 takes place in such a way that a sheet 3 of normal length lifted off the stack closes the query bores 9, while a sheet which is too short leaves the query bores 9 completely or partially open when it is lifted off the sheet stack.
  • FIGS. 3 and 4 illustrate the design of a suction air measuring nozzle on a double suction device 16 known per se, the two lifting nozzles of which are connected to a common T-piece 7 for supplying suction air, which can be rotated about the vertical axis of a suction air guide pin.
  • a suction device 4 and a suction air measuring nozzle 8 are thus connected to a common supply line 12.
  • the suction air openings of the lifting nozzle 4 are covered by the arc in any case, while the query bore 9 of the suction air measuring nozzle 8 is offset by rotating the T-piece 7 of the double suction device 16 so that there is no complete overlap if the curve is too short. In such a case, the rear edge 13 of the sheet 3 lifted from the sheet stack 1 lies in the region of the query bore 9 or in the transport direction of the sheet 3 behind it.
  • FIGS. 5, 6 and 7 show advantageous examples of how a suction air measuring nozzle can be formed from a lifting suction device 4 known per se with little construction effort.
  • a cap 14, preferably made of an elastic plastic, is placed on the lower end of a lifting suction device 4 and has only one eccentric query bore 9 in the bottom, which is effective as a suction air measuring nozzle.
  • the other suction air openings of the vacuum cleaner are closed by the cap 14.
  • the interrogation hole 9 is directed towards the rear edge of a just permissible arc length, as was described above.
  • the sectional view in FIG. 6 shows a cap 14 with a wart formation 15 on the query bore 9, while the example in FIG. 7 shows a cap with a flat bottom.

Landscapes

  • Sheets, Magazines, And Separation Thereof (AREA)
  • Measuring Arrangements Characterized By The Use Of Fluids (AREA)
  • Controlling Sheets Or Webs (AREA)
EP90102182A 1989-03-04 1990-02-03 Dispositif pour demander la longueur d'une feuille dans une machine de traitement de feuilles, notamment dans une machine rotative à imprimer pour feuilles Expired - Lifetime EP0386470B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3906960 1989-03-04
DE3906960A DE3906960C2 (de) 1989-03-04 1989-03-04 Vorrichtung zur Bogenlängenabfrage im Anleger einer Druckmaschine

Publications (3)

Publication Number Publication Date
EP0386470A2 true EP0386470A2 (fr) 1990-09-12
EP0386470A3 EP0386470A3 (fr) 1991-01-02
EP0386470B1 EP0386470B1 (fr) 1993-05-12

Family

ID=6375525

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90102182A Expired - Lifetime EP0386470B1 (fr) 1989-03-04 1990-02-03 Dispositif pour demander la longueur d'une feuille dans une machine de traitement de feuilles, notamment dans une machine rotative à imprimer pour feuilles

Country Status (6)

Country Link
US (1) US5088716A (fr)
EP (1) EP0386470B1 (fr)
JP (1) JPH02276734A (fr)
CN (1) CN1013856B (fr)
CA (1) CA2007112A1 (fr)
DE (2) DE3906960C2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2229166B (en) * 1989-03-04 1993-09-29 Heidelberger Druckmasch Ag Sheet printing or processing machine with sheet length scanning device

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5372066A (en) * 1993-08-11 1994-12-13 Becmar Corp. Multiple feed cylinder press
US6230076B1 (en) * 1999-09-29 2001-05-08 Pitney Bowes Inc. Method and apparatus for the automation of an envelope opening station
US20070138733A1 (en) * 2005-12-16 2007-06-21 Chris Gray Pick mechanism
US7976013B1 (en) * 2008-02-22 2011-07-12 Young Ronald J Cyclically controlled paper feeder with optical stack level control
CN108339758A (zh) * 2018-03-16 2018-07-31 电子科技大学中山学院 轴承外圈自动检测和上下料方法及设备
CN108891982B (zh) * 2018-07-04 2020-06-05 浙江科技学院 一种自动插标装置
CN109491316B (zh) * 2018-12-20 2020-11-24 玉田县盛田印刷包装机械有限公司 用于纸张收集的plc控制系统及方法
CN115123852B (zh) * 2022-08-23 2022-12-06 常州永春包装彩印有限公司 医疗包装袋用吸塑纸输送装置

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GB799067A (en) * 1956-03-12 1958-07-30 Midland Silicones Ltd Improvements in or relating to organosilicon derivatives
DE1220718B (de) * 1959-04-22 1966-07-07 Jagenberg Werke Ag Vorrichtung zum Stapeln von Bogen in Querschneidemaschinen
USB345475I5 (fr) * 1967-08-01
DE1786165A1 (de) * 1968-08-26 1972-01-20 Harris Intertype Corp Steuerung fuer einen Bogenzufuehrer
US3627311A (en) * 1969-09-08 1971-12-14 Xerox Corp Sheet sensor
US3617048A (en) * 1970-04-17 1971-11-02 Eastman Kodak Co Vacuum paper feeder
DE2132248C3 (de) * 1970-08-03 1980-02-28 Veb Kombinat Polygraph Werner Lamberz Leipzig, Ddr 7050 Leipzig Pneumatisch arbeitende Vorrichtung zum Auslösen von Zähl- und/oder Abschaltvorgängen, insbesondere für Druckmaschinen
DE2145273C3 (de) * 1971-09-10 1979-11-29 Maschinenbau Oppenweiler Gmbh, 7155 Oppenweiler Vorrichtung zum Abziehen des obersten Bogens eines Stapels
US4184674A (en) * 1972-03-25 1980-01-22 Heidelberger Druckmaschinen Aktiengesellschaft Monitoring device for missing and skewed sheets in sheet feeds
US4090702A (en) * 1972-04-26 1978-05-23 Heidelberger Druckmaschinen Ag Suction air control device for use with sheet feeds
DE2318443A1 (de) * 1972-05-05 1973-11-22 Polygraph Leipzig Verfahren und einrichtungen zur vereinzelung und kontrolle von bogen
US3966197A (en) * 1973-11-19 1976-06-29 Veb Polygraph Leipzig Kombinat Fur Polygraphische Maschinen Und Ausrustungen Method and apparatus for controlled feeding of sheets to printing machines or the like
GB1461248A (en) * 1974-11-22 1977-01-13 Nippon Flute Co Ltd Fluid-operating sensing apparatus
DE2606848A1 (de) * 1976-02-20 1977-09-01 Jochen H Dipl Ing Gelbke Einzelbogenanleger
GB1547776A (en) * 1976-03-16 1979-06-27 Hartley & Sons Ltd G Movoment of paper and like sheets from a stack
DE2621250C2 (de) * 1976-05-13 1982-07-22 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Bogenabfragevorrichtung in einer Rotationsdruckmaschine
JPS53145271A (en) * 1977-05-24 1978-12-18 Fuji Photo Film Co Ltd Sheet feeder
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2229166B (en) * 1989-03-04 1993-09-29 Heidelberger Druckmasch Ag Sheet printing or processing machine with sheet length scanning device

Also Published As

Publication number Publication date
CN1045377A (zh) 1990-09-19
CA2007112A1 (fr) 1990-09-04
EP0386470A3 (fr) 1991-01-02
EP0386470B1 (fr) 1993-05-12
DE59001391D1 (de) 1993-06-17
CN1013856B (zh) 1991-09-11
DE3906960A1 (de) 1990-09-06
DE3906960C2 (de) 1994-11-03
JPH02276734A (ja) 1990-11-13
US5088716A (en) 1992-02-18

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