EP0047413B1 - Verfahren und Vorrichtung zum Steuern der Ankunft einzeln vorgeschobener Bogen aus biegsamem Material - Google Patents

Verfahren und Vorrichtung zum Steuern der Ankunft einzeln vorgeschobener Bogen aus biegsamem Material Download PDF

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Publication number
EP0047413B1
EP0047413B1 EP19810106449 EP81106449A EP0047413B1 EP 0047413 B1 EP0047413 B1 EP 0047413B1 EP 19810106449 EP19810106449 EP 19810106449 EP 81106449 A EP81106449 A EP 81106449A EP 0047413 B1 EP0047413 B1 EP 0047413B1
Authority
EP
European Patent Office
Prior art keywords
sheet
arrival
machine
time interval
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.)
Expired
Application number
EP19810106449
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German (de)
English (en)
French (fr)
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EP0047413A1 (de
Inventor
Peter Lehner
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.)
Weitmann and Konrad GmbH and Co KG
Original Assignee
Weitmann and Konrad GmbH and Co KG
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Publication date
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Publication of EP0047413A1 publication Critical patent/EP0047413A1/de
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H9/00—Registering, e.g. orientating, articles; Devices therefor
    • B65H9/20—Assisting by photoelectric, sonic, or pneumatic indicators

Definitions

  • the invention relates to a method for controlling the arrival of individually fed sheets of flexible material at the inlet of sheet-processing machines, in particular printing machines, in which the arrival of the sheet at a contact point is determined by means of a probe within a predetermined time interval. Furthermore, the invention also relates to an apparatus for performing such a method.
  • sheet-processing machines for example offset printing machines, in which paper sheets are printed in one or more colors
  • an application device which feeds the individual sheets to the machine, so that they arrive at a contact point near the machine inlet within a predetermined time interval and from there can be entered into the machine by gripper members or the like.
  • the sheet must be fed with the machine cycle, i.e. H. be synchronized with the rotational speed of sheet-guiding rollers.
  • a sheet arriving outside the specified time interval, i.e. too early or too late, would lead to disruptions in the production process.
  • the machine manufacturer has set the synchronization between the feeder and the sheet-processing machine. If the sheet arrival falls outside the above-mentioned tolerance range, the sheet travel must be corrected manually, for example by changing the blown air or by adjusting the application device, and there is generally no reason to change the relevant manipulated variable. One is therefore largely dependent on empiricism. H. It often takes a long time until the variable manipulated variables are set so that the sheet-processing machine and feeder work again in the correct cycle.
  • the object is achieved according to the invention in that the arrival of the sheet at the contact point is additionally monitored with reference to a smaller time range which corresponds to the optimum sheet arrival and is regulated as a function of the sheet advance.
  • the invention provides that in addition to the sensing means is provided with a signal generator which indicates the optimal arrival, which additionally specifies a smaller time range which lies within the predetermined time interval and corresponds to the optimal sheet arrival and whose output signal compares with the sensing means output signals in terms of time triggers a manual or automatic adjustment of the sheet advance.
  • a stack 2 of sheets of paper to be printed rests on a platform 3 which can be raised in the direction of arrow 4, so that the top sheet 5 is essentially always removed when the sheets are continuously removed from the stack located at the same height.
  • a transfer device 7 known per se for example equipped with suction heads 6, transfers the top sheets 5 in each case to an inclined feed table 8, on which they advance with partial overlap up to a stop 9 arranged on the front edge of the table 8.
  • the arrival of a sheet 5 is sensed, for example in a small gap between the front edge of the table 8 and the stop 9, by a light barrier 10 consisting of two or more electro-optical reflex sensors.
  • FIG. 1 Behind the stop 9 forming a contact point for the sheets 5 there is the inlet of a printing press, of which only one roller 11 in its entirety and another roller 12 are partially shown in FIG. 1.
  • the rollers 11, 12 rotate in the direction of the arrows 13 at a constant speed.
  • Known grippers 14 are arranged on the roller 11, which grippers 5 arrive at the sheet 5 grasp and insert into the machine after the stop 9 has been automatically moved away at the right time. After the sheet 5 has been drawn into the machine, the stop 9 returns to its starting position. The movement of the stop 9 takes place in the direction of the double arrow 15.
  • a sheet 5 can only be gripped by the gripper 14 if a synchronization is established between the sheet fed and fed by the application device 1 and the rotating roller 11 in such a way that a sheet 5 is always present at the contact point when the gripper 14 is within a certain range of rotation angle in the vicinity of the contact point.
  • This rotation angle range corresponds to a certain time interval, which is shown in FIG. 2 by the distance between A and B.
  • electrical switching devices are provided which include a rotary angle sensor which detects the predetermined time interval between A and B and which cooperates with the light barrier 10 in such a way that it can always be ascertained whether a sheet bears properly against the stop 9 in the time interval A, B. If this is not the case, the machine is switched off automatically.
  • the optimal arrival of the bow lies approximately in the middle of the time interval A, B and is represented in FIG. 3 by the substantially smaller time range E, F located within the interval A, B.
  • the sheet arrival located in this time range E, F is additionally monitored and, depending on this, the sheet advance is already regulated accordingly at the application device 1.
  • the idea of the invention is therefore not to wait until the sheet arrival falls outside the predetermined time interval A, B and the machine is brought to a standstill, but also to perform a monitoring within the interval A, B and thereby prevent the sheet arrival from falling out by appropriate adjustments To prevent, for example, on the application device 1, so that it can not even come to a shutdown of the machine and a related loss of production.
  • Fig. 4 shows an enlarged view of the roller 11 rotating in the direction of arrow 13 with the gripper 14.
  • the markings A and B indicate the range of rotation or the time interval corresponding thereto, within which an arc 5 is gripped by the gripper 14 and drawn into the machine can be. Within this time interval, an arc must have arrived at the stop 9 and be properly applied, which is done by the light barrier 10 in connection with a switching element which signals the time interval A, B.
  • the light barrier 10 is now assigned a further switching element which signals the optimal arrival of the bow, which is represented schematically in FIG. 4 by a microswitch 16 and a cam 18 which actuates it and is arranged on the shaft 17 of the roller 11.
  • This arrangement which functions as a rotation angle transmitter, supplies a signal associated with the time range E, F, that is to say the optimum arch arrival, which, in conjunction with the light barrier 10, is used in a known manner to determine in an electrical comparison circuit whether the arch arrival is too early, i.e. before Time E is whether the sheet arrival is correctly in the time range between E and F, or whether the sheet arrives too late, ie arrives at stop 9 after time F.
  • a switching motor of the application device 1 can receive the command to turn forward or backward for a certain time by simple switching means until the arrival of the bow again falls within the optimal time range E, F.
  • a counter built into the switching arrangement assigned to the machine in a manner known per se adds up the number of sheets arriving too early or too late and triggers an adjustment command only when a certain number of successively arriving sheets, for example three sheets, do not fall properly in the range E, F with regard to their arrival time.
  • the arrangement described according to the invention has the advantage that an additional installation of measuring devices or sensors in the form of light barriers 10 or the like is not necessary. It is sufficient to additionally install the rotary angle sensor represented by the parts 16 and 18, which interrogates the time range E, F, in order to carry out a manual or automatic correction of the application device 1. Since the time range E, F was not sensed in known machines and was not used for control purposes, it was so far. not possible to recognize the optimal sheet arrival with reference to the angle of rotation of the roller 11 and to make corresponding corrections to the application device.
  • the invention thus enables that the application device 1 can always be optimally adjusted, possibly also by remote control, regardless of the machine speed, the nature of the sheets 5 to be fed and their surface, so that downtimes of the machine can be avoided. This enables a higher machine speed (printing speed) and greater machine performance with relatively little additional effort.
  • the rule or control principle according to the invention is otherwise not limited to monitoring the arrival of individual sheets.
  • this principle also enables, for example, a check of the registration register in a sheet fed press or the like.
  • a larger measuring range which is assigned to the precise sheet arrangement and / or sheet orientation and is scanned by a light barrier or the like, is also provided there. If a sheet is outside this measuring range shortly before it is fed into the machine, the machine is switched off.
  • a smaller measuring range is now scanned, for example by a second reflection light barrier, designated by the reference numeral 20 in FIG. 1, and is brought into relation with the adjacent and aligning sheets.
  • the larger measuring range can be, for example, 1 to 2 mm.
  • the more precise measuring range scanned by the light barrier 20 can be less than 1/10 mm. Continuous monitoring of the sheets in this small measuring range and corresponding readjustment of the relevant manipulated variables can then ensure proper sheet feeding without switching off the machine. With this arrangement, too, the different measuring ranges can be interrogated at different times.
  • the advantages of this arrangement are, in turn, that measures for correcting application and / or register errors can be initiated in good time, that a statement about the application quality of the processed sheets is possible and that a higher printing speed can be achieved by better machine setting.

Landscapes

  • Controlling Sheets Or Webs (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Discharge By Other Means (AREA)
EP19810106449 1980-09-09 1981-08-19 Verfahren und Vorrichtung zum Steuern der Ankunft einzeln vorgeschobener Bogen aus biegsamem Material Expired EP0047413B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19803033780 DE3033780A1 (de) 1980-09-09 1980-09-09 Verfahren und vorrichtung zum steuern der ankunft einzeln vorgeschobener bogen aus biegsamem material
DE3033780 1980-09-09

Publications (2)

Publication Number Publication Date
EP0047413A1 EP0047413A1 (de) 1982-03-17
EP0047413B1 true EP0047413B1 (de) 1984-11-07

Family

ID=6111411

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19810106449 Expired EP0047413B1 (de) 1980-09-09 1981-08-19 Verfahren und Vorrichtung zum Steuern der Ankunft einzeln vorgeschobener Bogen aus biegsamem Material

Country Status (3)

Country Link
EP (1) EP0047413B1 (enrdf_load_stackoverflow)
JP (1) JPS5787368A (enrdf_load_stackoverflow)
DE (1) DE3033780A1 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4001120A1 (de) * 1990-01-17 1991-07-18 Heidelberger Druckmasch Ag Vorrichtung zur regelung der bogenanlage bei bogenverarbeitenden maschinen,insbesondere druckmaschinen

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3301722C2 (de) 1983-01-20 1985-03-07 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Verfahren und Vorrichtung zur paßgerechten Zuführung von Bogen an bogenverarbeitenden Maschinen
JP2594427B2 (ja) * 1986-12-25 1997-03-26 株式会社小森コーポレーション 印刷機械の紙流れ警報装置
JPS63160843A (ja) * 1986-12-25 1988-07-04 Komori Printing Mach Co Ltd 印刷機械の紙流れ警報装置
US4771690A (en) * 1987-04-24 1988-09-20 Ernst W. Dorn Company, Inc. Screen printing apparatus for limited flexibility stock
DE3842390C3 (de) * 1988-12-16 2001-11-29 Roland Man Druckmasch Steuervorrichtung
US5056771A (en) * 1989-08-25 1991-10-15 Lexmark International, Inc. Apparatus for controlling interpage gaps in printers and method of interpage gap control
DE4140051C2 (de) * 1991-12-05 1996-11-07 Leuze Electronic Gmbh & Co Einrichtung zum Überwachen der Ankunft von Bogen am Einlaß bogenverarbeitender Maschinen
DE10112946A1 (de) * 2001-03-17 2002-09-26 Nexpress Solutions Llc Verfahren und Vorrichtung zum Erkennen des Vorhandenseins eines Objektes, vorzugsweise eines blatt- oder bogenförmigen Objektes für eine Bedruckung
JP2008006632A (ja) * 2006-06-28 2008-01-17 Komori Corp 紙流れ調整装置および方法
DE102023135280B3 (de) 2023-12-15 2025-01-16 Koenig & Bauer Ag Verfahren zum Betreiben einer bogenverarbeitenden Maschine

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2202851C3 (de) * 1972-01-21 1981-04-23 Weitmann & Konrad GmbH & Co KG, 7023 Echterdingen Kontrollvorrichtung zur automatischen Druckanstellung und späteren Einlauf- und Anlegekontrolle bei bogenführenden Druckmaschinen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4001120A1 (de) * 1990-01-17 1991-07-18 Heidelberger Druckmasch Ag Vorrichtung zur regelung der bogenanlage bei bogenverarbeitenden maschinen,insbesondere druckmaschinen

Also Published As

Publication number Publication date
DE3033780A1 (de) 1982-04-22
EP0047413A1 (de) 1982-03-17
JPS5787368A (en) 1982-05-31
DE3033780C2 (enrdf_load_stackoverflow) 1989-06-29

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