EP0271666B1 - Method for monitoring printed sheets in a collator - Google Patents

Method for monitoring printed sheets in a collator Download PDF

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Publication number
EP0271666B1
EP0271666B1 EP87115213A EP87115213A EP0271666B1 EP 0271666 B1 EP0271666 B1 EP 0271666B1 EP 87115213 A EP87115213 A EP 87115213A EP 87115213 A EP87115213 A EP 87115213A EP 0271666 B1 EP0271666 B1 EP 0271666B1
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European Patent Office
Prior art keywords
tolerance
range
value
measured
sheet
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EP87115213A
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German (de)
French (fr)
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EP0271666A2 (en
EP0271666A3 (en
Inventor
Roland Grunder
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Grapha Holding AG
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Grapha Holding AG
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Priority to AT87115213T priority Critical patent/ATE84012T1/en
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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
    • B65H43/00—Use of control, checking, or safety devices, e.g. automatic devices comprising an element for sensing a variable
    • B65H43/04—Use of control, checking, or safety devices, e.g. automatic devices comprising an element for sensing a variable detecting, or responding to, presence of faulty articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H39/00—Associating, collating, or gathering articles or webs
    • B65H39/02—Associating,collating or gathering articles from several sources
    • B65H39/04—Associating,collating or gathering articles from several sources from piles
    • B65H39/055—Associating,collating or gathering articles from several sources from piles by collecting in juxtaposed carriers
    • 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
    • B65H2511/52—Defective operating conditions
    • B65H2511/529—Defective operating conditions number thereof, frequency of occurrence

Definitions

  • the invention relates to a method according to the preamble of patent claim 1.
  • DE-OS 34 24 665 describes a method in which the printed sheets are grouped into groups of n sheets each, and in which at the beginning of a campaign, that is, after the machine has been switched to a new order, in the first printing sheet unit of the first group is measured at the feeder stations and the measured value initially serves as a reference value for the subsequent printing sheets.
  • the mean value of the first n press sheets then serves as a reference value for the n press sheets adjoining the first group of n press sheets, but any incorrect filing during filing of the first group is not taken into account in this averaging. If a misfeed occurs when the first sheet is pulled off, all later correctly drawn sheets are determined as misfeeds and rejected, whereas all sheets that have been removed are qualified as "good” with the same error as the first and remain in the further processing process.
  • DE-OS 34 24 665 does not take this risk into account and therefore does not work satisfactorily, in particular in the case of gathering machines with many feed stations, since, as mentioned, only the detection of missing printing sheet units can take place automatically when first printed. Detection of duplicate printed sheets can only be done by visual inspection after the first print, for which the machine is stopped, or automatically in the subsequent correct prints, in which these are then identified as defective printed sheets and discharged. However, the relevant docking stations do not yet have a correct reference value and the start routine (start program) must be repeated until a correct printed sheet is accidentally pulled off at all docking stations when it is first pulled off.
  • start routine start program
  • This method therefore has the disadvantage that the starting process has to be repeated several times, in particular in the case of machines with many landing stations, which leads to large machine loss times and the occurrence of waste.
  • the separating means for the sheets such as needles, blown air, etc.
  • the machine may happen that the machine cannot be started successfully if the first pull is unsuccessful measure and save a correct reference value on all investors after the start-up process.
  • the object of the complete invention is to create a method which eliminates the disadvantages mentioned, that is to say, with which the set-up time can be shortened to a new order or which ensures that the correct reference value is automatically determined even in the case of deficiently configured feed stations, without the Abort the start process and have to start again.
  • This method has the advantage that it is practically impossible for the measurement value of a faulty sheet to become the reference value if "n" is chosen to be equal to or greater than three, since the same error practically never occurs more than twice in succession on the same feeder.
  • the thickness measuring devices are calibrated in a blind test and taken into account when determining the tolerance range. This eliminates constant measuring errors in the thickness measuring devices.
  • the embodiment of the method according to claim 5 has the advantage that the operator is signaled if an investor has not been set up with the usual care when converting to a new order.
  • reference number 1 denotes the feeders of a collating machine, from which the printed sheets are separated and placed on a transport device 2.
  • Each of the feeders 1 is provided with a thickness measuring device.
  • This essentially comprises a sensor 3, a clock generator 4 and a computer 5.
  • the computer 5 controls a vacuum valve 6 in order to generate or cancel a suction effect on the suction pads of the investor.
  • the "reset" routine is executed and the machine is thus started.
  • the computer 5 closes the valve 6 and cuts off the vacuum supply, so that the gripper drum does not pull a sheet during the first working cycle.
  • a clock signal is emitted by the clock generator 4 after each working cycle of the investor.
  • the sensor 3 makes an empty measurement, which sets the calibration value Ro; this value therefore corresponds to the measured value without a sheet.
  • the reference value R is also reset in the computer 5 and the counter Z is brought into the starting position. At the same time, the vacuum is switched on by the computer 5.
  • the current measured value is stored in the computer 5, the counter Z is increased by 1, the current measured value is assigned to a variable M1 and the permissible deviation T is determined.
  • the permissible deviation T is preferably initially set to approximately 30% of the sheet thickness. The sheet thickness is calculated from the value of M1 minus the calibration value Ro.
  • the current measured value is again stored in the computer 5 and the counter Z is increased by 1.
  • the counter reading is now no longer 1, which is why the measured value is assigned to size M2, and it is then checked whether M2 does not deviate more than ⁇ T from M1. If this is the case, it continues until the counter Z reaches the value n, only then is the quantity M2 assigned to the reference value R. If M2 deviates more than ⁇ T from M1 before the counter has reached n, the counter is reset and the process is repeated automatically until a series of n-identical sheets have been drawn off in succession.
  • the computer 5 For each of the feeders 1, the computer 5 has two signal outputs 7 and 8, of which one (7) is directed to an AND gate 9 and the other (8) to a shift register 10.
  • the output of the shift register 10 is followed by an OR gate 11 with negation, the output of which, together with that of the AND gate 9, is guided to an AND gate 12, which opens or closes a transfer gate 13 in the transport device 2. If the computers 5 signal all feeders via their line 7 to the AND gate 9 that a reference value R has been stored, this feeds a signal to the AND gate 12. If the computers 5 of the individual feeders continue to signal the measurement result via their output 8 during a work cycle, this is fed to the OR gate 11 with the corresponding delay in the shift register 10, which supplies the AND gate 12 with a corresponding signal.
  • the AND gate 12 closes the switch 13 and the complete book blocks are sent for further processing. If, however, one of the computers 5 reported an incorrect storage to the shift register 10 during a work cycle, different signals are present at the AND gate 12 when the defective book block reaches the reject gate 13. This is now opened and the faulty book block is removed.
  • the diverter gate 13 can only be closed when all the computers 5 have a stored one via the output 7 of the AND gate 9 Report the reference value R.
  • the reject gate 13 remains open and all book blocks are rejected for the time being after the "reset" routine has been initiated, regardless of whether they have been compiled correctly or incorrectly. It is therefore impossible for faulty book blocks to be formed during the start-up phase of the machine due to the lack of a correct reference value R and to be allocated to further processing.
  • the associated waste is comparatively low, as experience has shown that the same mistake never occurs more than twice in succession on an investor.
  • 5 consecutive measured values of the same deviations from the tolerance range are counted in the computer. If three measured values of the same deviation follow, a control command is issued by the computer 5, which shuts down the machine drive 14. This prevents unnecessary waste at the start of a campaign due to inadequate setup of the separating agent (such as needles, blown air, etc.) by an investor. If the separating means on a feeder is adjusted during a long campaign, this fact is also signaled to the operator in this way.
  • the separating agent such as needles, blown air, etc.

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  • Controlling Sheets Or Webs (AREA)
  • Collation Of Sheets And Webs (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

In the method for monitoring printed sheets in a collator, the thickness of the printed sheets is measured in the individual feeders (1) and, in the event of deviation from a fixed tolerance range, a missing or faulty printed sheet is detected and a control pulse triggered for stopping the collator or for removing the faulty book block. So that the correct reference value is found automatically for each feeder, it is provided for each individual feeder (1) that, as soon as a specified number (n) of successive measurements of essentially the same measured values is determined, the position of the tolerance range is determined with the last of these measured values. <IMAGE>

Description

Die Erfindung betrifft ein Verfahren gemäss dem Oberbegriff des Patentanspruchs 1.The invention relates to a method according to the preamble of patent claim 1.

In der DE-OS 34 24 665 ist ein Verfahren beschrieben, bei dem die Druckbogen zu sich folgenden Gruppen zu je n-Bogen geordnet werden und bei dem zu Beginn einer Kampagne, das heisst, nach dem Umstellen der Maschine auf einen neuen Auftrag, in den Anlegestationen die erste Druckbogeneinheit der ersten Gruppe gemessen wird und der Messwert vorerst als Referenzwert für die nachfolgenden Druckbogen dient. Für die an die erste Gruppe von n-Druckbogen anschliessenden n-Druckbogen dient dann der Mittelwert der ersten n-Druckbogen als Referenzwert, wobei aber allfällige Fehlablagen während des Ablegens der ersten Gruppe bei dieser Mittelwertbildung nicht berücksichtigt werden. Erfolgt schon beim Abziehen des ersten Bogens eine Fehlablage, werden alle späteren richtig abgezogenen Bogen als Fehlablage ermittelt und ausgeschleust, wogegen alle abgezogenen Bogen mit gleichem Fehler wie beim ersten als "gut" qualifiziert werden und im Weiterverarbeitungsprozess verbleiben.DE-OS 34 24 665 describes a method in which the printed sheets are grouped into groups of n sheets each, and in which at the beginning of a campaign, that is, after the machine has been switched to a new order, in the first printing sheet unit of the first group is measured at the feeder stations and the measured value initially serves as a reference value for the subsequent printing sheets. The mean value of the first n press sheets then serves as a reference value for the n press sheets adjoining the first group of n press sheets, but any incorrect filing during filing of the first group is not taken into account in this averaging. If a misfeed occurs when the first sheet is pulled off, all later correctly drawn sheets are determined as misfeeds and rejected, whereas all sheets that have been removed are qualified as "good" with the same error as the first and remain in the further processing process.

In Zusammentragmaschinen dieser Art werden oft zwanzig oder mehr Druckbogen zu einem Buchblock gesammelt, dabei ist die Gefahr, dass die Anlegestationen fehlerhaft arbeiten, gerade zu Beginn einer Kampagne, das heisst, nach dem Einrichten auf einen neuen Auftrag am grössten.In collation machines of this type, twenty or more printed sheets are often collected to form a book block, and the risk that the feed stations work incorrectly is greatest, particularly at the start of a campaign, that is to say after setting up a new job.

Das in der DE-OS 34 24 665 beschriebene Verfahren berücksichtigt diese Gefahr nicht und arbeitet deshalb insbesondere bei Zusammentragmaschinen mit vielen Anlegestationen nicht zufriedenstellend, da, wie erwähnt, nur das Erkennen auf fehlende Druckbogeneinheiten automatisch beim Erstabzug erfolgen kann. Das Erkennen auf doppelte Druckbogen kann nur durch Sichtkontrolle nach dem Erstabzug erfolgen, wozu die Maschine angehalten wird, oder aber automatisch bei den nachfolgenden ordnungsgemässen Abzügen, indem diese dann als fehlerhafte Druckbogen festgestellt und ausgeschleust werden. Die betreffenden Anlegestationen haben dann aber noch keinen richtigen Referenzwert und die Start-Routine (Startprogramm) muss solange wiederholt werden, bis zufällig an allen Anlegestationen beim Erstabzug ein ordnungsgemässer Druckbogen abgezogen wird.The method described in DE-OS 34 24 665 does not take this risk into account and therefore does not work satisfactorily, in particular in the case of gathering machines with many feed stations, since, as mentioned, only the detection of missing printing sheet units can take place automatically when first printed. Detection of duplicate printed sheets can only be done by visual inspection after the first print, for which the machine is stopped, or automatically in the subsequent correct prints, in which these are then identified as defective printed sheets and discharged. However, the relevant docking stations do not yet have a correct reference value and the start routine (start program) must be repeated until a correct printed sheet is accidentally pulled off at all docking stations when it is first pulled off.

Dieses Verfahren hat somit den Nachteil, dass der Startvorgang insbesondere bei Maschinen mit vielen Anlegestationen mehrmals wiederholt werden muss, was zu grossen Maschinenverlustzeiten und Makulaturanfall führt.This method therefore has the disadvantage that the starting process has to be repeated several times, in particular in the case of machines with many landing stations, which leads to large machine loss times and the occurrence of waste.

Sind an den einzelnen Anlegestationen zudem noch die Separiermittel für die Bogen, wie Nadeln, Blasluft usw. nicht bereits vor dem Starten sorgfältig eingestellt worden, kann es vorkommen, dass die Maschine überhaupt nicht erfolgreich gestartet werden kann, wenn es nicht gelingt mit dem ersten Abzug nach dem Startvorgang an allen Anlegern einen richtigen Referenzwert zu messen und abzuspeichern.If the separating means for the sheets, such as needles, blown air, etc., have not been carefully set at the individual feed stations before starting, it may happen that the machine cannot be started successfully if the first pull is unsuccessful measure and save a correct reference value on all investors after the start-up process.

Aufgabe der voliegenden Erfindung ist die Schaffung eines Verfahrens, das die erwähnten Nachteile beseitigt, das heisst, mit dem die Einrichtezeit auf einen neuen Auftrag verkürzt werden kann bzw. das gewährleistet, dass auch bei mangelhaft voreingerichteten Anlegestationen der richtige Referenzwert automatisch ermittelt wird, ohne den Startvorgang abbrechen und erneut wieder starten zu müssen.The object of the complete invention is to create a method which eliminates the disadvantages mentioned, that is to say, with which the set-up time can be shortened to a new order or which ensures that the correct reference value is automatically determined even in the case of deficiently configured feed stations, without the Abort the start process and have to start again.

Erfindungsgemäss wird diese Aufgabe gelöst durch die kennzeichnenden Merkmale des Anspruchs 1.According to the invention, this object is achieved by the characterizing features of claim 1.

Dieses Verfahren hat den Vorteil, dass es praktisch ausgeschlossen ist, dass der Messwert eines fehlerhaften Bogens zum Referenzwert wird, wenn "n" gleich oder grösser als drei gewählt wird, da beim selben Anleger der gleiche Fehler praktisch nie mehr als zweimal hintereinander auftritt.This method has the advantage that it is practically impossible for the measurement value of a faulty sheet to become the reference value if "n" is chosen to be equal to or greater than three, since the same error practically never occurs more than twice in succession on the same feeder.

Bei der Ausführungsform nach Anspruch 2 ergibt sich der Vorteil dass eine kontinuierliche Veränderung der Papierdicke während einer Kampagne laufend mit berücksichtigt und der Toleranzbereich entsprechend verschoben wird.In the embodiment according to claim 2, there is the advantage that a continuous change in the paper thickness is continuously taken into account during a campaign and the tolerance range is shifted accordingly.

Bei der Ausführungsform des Verfahrens nach Anspruch 3 ergibt sich der Vorteil, dass in einem Blindversuch die Dickenmesseinrichtungen geeicht und bei der Festlegung des Toleranzbereiches berücksichtigt werden. Konstante Messfehler der Dickenmesseinrichtungen werden dadurch eliminiert.In the embodiment of the method according to claim 3, there is the advantage that the thickness measuring devices are calibrated in a blind test and taken into account when determining the tolerance range. This eliminates constant measuring errors in the thickness measuring devices.

Bei der Ausführungsform des Verfahrens nach Anspruch 4 besteht der Vorteil, dass die Bedienungsperson lediglich den Start-Knopf der Zusammentragmaschine betätigen muss, und dabei die Gewissheit hat, dass kein einziges Fehlexemplar geheftet wird.In the embodiment of the method according to claim 4, there is the advantage that the operator only has to press the start button of the collating machine, and has the certainty that not a single faulty copy is stapled.

Die Ausführungsform des Verfahrens nach Anspruch 5 ergibt den Vorteil, dass der Bedienungsperson signalisiert wird, wenn ein Anleger beim Umrüsten auf einen neuen Auftrag, nicht mit der üblichen Sorgfalt eingerichtet wurde.The embodiment of the method according to claim 5 has the advantage that the operator is signaled if an investor has not been set up with the usual care when converting to a new order.

Anhand der beiliegenden schematischen Zeichnung wird die Erfindung beispielsweise erläutert. Es zeigen:

Fig. 1
eine Vorrichtung zur Durchführung des Verfahrens und
Fig. 2
ein Flussdiagramm zur Referenzwertbildung beim Startvorgang.
The invention is explained, for example, with the aid of the attached schematic drawing. Show it:
Fig. 1
a device for performing the method and
Fig. 2
a flow chart for reference value formation during the starting process.

Zusammentragmaschinen sind bekannt und beispielsweise in der US-PS 34 14 257 beschrieben.Gathering machines are known and are described, for example, in US Pat. No. 3,414,257.

In Figur 1 bezeichnet die Hinweisziffer 1 die Anleger einer Zusammentragmaschine, von denen die Druckbogen vereinzelt und auf eine Transporteinrichtung 2 abgelegt werden. Jeder der Anleger 1 ist mit einer Dickenmessvorrichtung versehen. Diese umfasst im wesentlichen einen Fühler 3, einen Taktgeber 4 und einen Rechner 5. Der Rechner 5 steuert ein Vakuumventil 6, um an den Sauggreifern des Anlegers eine Saugwirkung zu erzeugen oder aufzuheben.In FIG. 1, reference number 1 denotes the feeders of a collating machine, from which the printed sheets are separated and placed on a transport device 2. Each of the feeders 1 is provided with a thickness measuring device. This essentially comprises a sensor 3, a clock generator 4 and a computer 5. The computer 5 controls a vacuum valve 6 in order to generate or cancel a suction effect on the suction pads of the investor.

Jedesmal wenn die Maschine auf andere Bogen umgerichtet wird, wird die "Reset"-Routine ausgeführt und damit die Maschine in Gang gesetzt. Gleichzeitig schliesst der Rechner 5 das Ventil 6 und unterbricht die Vakuumzufuhr, so dass die Greifertrommel während des ersten Arbeitszyklus keinen Bogen abzieht. Nach jedem Arbeitszyklus des Anlegers erfolgt vom Taktgeber 4 ein Taktsignal. Nach dem ersten Taktsignal macht der Fühler 3 eine Leermessung, womit der Eichwert Ro festgelegt wird; dieser Wert entspricht somit dem Messwert ohne Bogen. Nach dem ersten Takt wird im Rechner 5 zudem der Referenzwert R zurückgestellt und der Zähler Z wird in die Ausgangslage gebracht. Gleichzeitig wird vom Rechner 5 das Vakuum eingeschaltet. Beim zweiten Takt wird im Rechner 5 der aktuelle Messwert gespeichert, der Zähler Z um 1 erhöht, der aktuelle Messwert einer Grösse M1 zugeordnet und die zulässige Abweichung T ermittelt. Die zulässige Abweichung T wird anfänglich vorzugsweise auf zirka 30 % der Bogendicke festgelegt. Die Bogendicke errechnet sich aus dem Wert von M1 minus dem Eichwert Ro.Every time the machine is converted to different sheets, the "reset" routine is executed and the machine is thus started. At the same time, the computer 5 closes the valve 6 and cuts off the vacuum supply, so that the gripper drum does not pull a sheet during the first working cycle. A clock signal is emitted by the clock generator 4 after each working cycle of the investor. After the first clock signal, the sensor 3 makes an empty measurement, which sets the calibration value Ro; this value therefore corresponds to the measured value without a sheet. After the first cycle, the reference value R is also reset in the computer 5 and the counter Z is brought into the starting position. At the same time, the vacuum is switched on by the computer 5. In the second cycle, the current measured value is stored in the computer 5, the counter Z is increased by 1, the current measured value is assigned to a variable M1 and the permissible deviation T is determined. The permissible deviation T is preferably initially set to approximately 30% of the sheet thickness. The sheet thickness is calculated from the value of M1 minus the calibration value Ro.

Nach dem nächsten Takt wird im Rechner 5 wiederum der aktuelle Messwert gespeichert und der Zähler Z um 1 erhöht. Der Zählerstand ist nun nicht mehr 1, deshalb wird der Messwert der Grösse M2 zugeordnet, anschliessend wird kontrolliert, ob M2 nicht mehr als ± T von M1 abweicht. Ist dies der Fall, geht es so weiter bis der Zähler Z den Wert n erreicht, erst dann wird die Grösse M2 dem Referenzwert R zugeordnet. Weicht M2 mehr als ± T von M1 ab bevor der Zähler n erreicht hat, wird der Zähler zurückgestellt, und der Vorgang wiederholt sich automatisch bis eine Reihe von n-gleichen Bogen nacheinander abgezogen wurde.After the next cycle, the current measured value is again stored in the computer 5 and the counter Z is increased by 1. The counter reading is now no longer 1, which is why the measured value is assigned to size M2, and it is then checked whether M2 does not deviate more than ± T from M1. If this is the case, it continues until the counter Z reaches the value n, only then is the quantity M2 assigned to the reference value R. If M2 deviates more than ± T from M1 before the counter has reached n, the counter is reset and the process is repeated automatically until a series of n-identical sheets have been drawn off in succession.

Bei jedem der Anleger 1 weist der Rechner 5 zwei Signalausgänge 7 bzw. 8 auf, von denen der eine (7) auf ein UND-Gatter 9 und der andere (8) auf ein Schieberegister 10 geleitet ist. Dem Ausgang des Schieberegisters 10 ist ein ODER-Gatter 11 mit Negation nachgeordnet, dessen Ausgang zusammen mit jenem des UND-Gatters 9 auf ein UND-Gatter 12 geführt ist, welches eine Ausschleusweiche 13 in der Transporteinrichtung 2 öffnet oder schliesst. Signalisieren die Rechner 5 sämtlicher Anleger über ihre Leitung 7 dem UND-Gatter 9, dass ein Referenzwert R abgespeichert ist, leitet dieses dem UND- Gatter 12 ein Signal zu. Signalisieren die Rechner 5 der einzelnen Anleger weiter über ihren Ausgang 8 das Messergebnis während eines Arbeitszyklus, wird dieses, mit der entsprechenden Verzögerung im Schieberegister 10, dem ODER-Gatter 11 zugeleitet, welches dem UND-Gatter 12 ein entsprechendes Signal zuleitet. Stimmen die Signale des UND-Gatters 9 und des ODER-Gatters 11 überein (was dann der Fall ist, wenn in allen Rechnern 5 ein Referenzwert R abgespeichert ist und bei keinem Anleger eine Fehlablage erfolgte), schliesst das UND-Gatter 12 die Weiche 13 und die vollständigen Buchblöcke werden der weiteren Verarbeitung zugeleitet. Meldete indessen einer der Rechner 5 während eines Arbeitszyklus dem Schieberegister 10 eine Fehlablage, stehen am UND-Gatter 12 verschiedene Signale an, wenn der fehlerhafte Buchblock die Ausschleusweiche 13 erreicht. Diese wird nun geöffnet und der fehlerhafte Buchblock ausgeschleust.For each of the feeders 1, the computer 5 has two signal outputs 7 and 8, of which one (7) is directed to an AND gate 9 and the other (8) to a shift register 10. The output of the shift register 10 is followed by an OR gate 11 with negation, the output of which, together with that of the AND gate 9, is guided to an AND gate 12, which opens or closes a transfer gate 13 in the transport device 2. If the computers 5 signal all feeders via their line 7 to the AND gate 9 that a reference value R has been stored, this feeds a signal to the AND gate 12. If the computers 5 of the individual feeders continue to signal the measurement result via their output 8 during a work cycle, this is fed to the OR gate 11 with the corresponding delay in the shift register 10, which supplies the AND gate 12 with a corresponding signal. If the signals of the AND gate 9 and the OR gate 11 match (which is the case if a reference value R has been stored in all the computers 5 and no deposit has been made with any feeder), the AND gate 12 closes the switch 13 and the complete book blocks are sent for further processing. If, however, one of the computers 5 reported an incorrect storage to the shift register 10 during a work cycle, different signals are present at the AND gate 12 when the defective book block reaches the reject gate 13. This is now opened and the faulty book block is removed.

Aus Figur 2 ist ersichtlich, dass die Ausschleusweiche 13 erst dann geschlossen werden kann, wenn sämtliche Rechner 5 über den Ausgang 7 dem UND-Gatter 9 einen abgespeicherten Referenzwert R melden. Bis zu diesem Zeitpunkt bleibt die Ausschleusweiche 13 offen und sämtliche Buchblöcke werden nach dem Einleiten der "Reset"-Routine vorerst ausgeschleust, gleichgültig ob sie richtig oder fehlerhaft zusammengetragen sind. Damit ist ausgeschlossen, dass während der Anlaufphase der Maschine durch das Fehlen eines richtigen Referenzwertes R fehlerhafte Buchblöcke gebildet und der weiteren Verarbeitung zugeleiletet werden. Der damit verbundene Makulaturanfall ist vergleichsweise gering, da erfahrungsgemäss an einem Anleger der gleiche Fehler nie mehr als zweimal nacheinader auftritt.It can be seen from FIG. 2 that the diverter gate 13 can only be closed when all the computers 5 have a stored one via the output 7 of the AND gate 9 Report the reference value R. Up to this point, the reject gate 13 remains open and all book blocks are rejected for the time being after the "reset" routine has been initiated, regardless of whether they have been compiled correctly or incorrectly. It is therefore impossible for faulty book blocks to be formed during the start-up phase of the machine due to the lack of a correct reference value R and to be allocated to further processing. The associated waste is comparatively low, as experience has shown that the same mistake never occurs more than twice in succession on an investor.

Nach einer bevorzugten Ausführungsform werden im Rechner 5 aufeinanderfolgende Messwerte gleicher Abweichungen vom Toleranzbereich (= gleiche Fehlablagen) gezählt. Folgen sich drei Messwerte gleicher Abweichung, erfolgt vom Rechner 5 ein Steuerbefehl, der den Maschinenantrieb 14 still setzt. Damit wird zu Beginn einer Kampagne unnötige Makulatur durch das mangelhafte Einrichten der Separiermittel (wie Nadeln, Blasluft etc.) eines Anlegers verhindert. Erfolgt während einer langen Kampagne eine Verstellung der Separiermittel an einem Anleger, wird auch dieser Umstand der Bedienungsperson auf diese Weise signalisiert.According to a preferred embodiment, 5 consecutive measured values of the same deviations from the tolerance range (= same misplacement) are counted in the computer. If three measured values of the same deviation follow, a control command is issued by the computer 5, which shuts down the machine drive 14. This prevents unnecessary waste at the start of a campaign due to inadequate setup of the separating agent (such as needles, blown air, etc.) by an investor. If the separating means on a feeder is adjusted during a long campaign, this fact is also signaled to the operator in this way.

Claims (10)

  1. A method of monitoring the printed sheets on an assembling machine with at least one sheet feeder, each sheet feeder of which pulls off a printed sheet during a cycle and places it on a feeder section which assembles the printed sheets to form a book block, wherein the thickness of the printed sheets is measured for the individual sheet feeders and a missing or defective printed sheet is identified if there is a departure from a given range of tolerance and a control pulse is triggered in order to stop the assembling machine or in order to reject the defective book block, characterised in that as soon as a given number (n) of successive measurements of substantially the same measured value is determined for the first time for each individual sheet feeder, the position of the range of tolerance is determined by means of the last of these measured values.
  2. A method according to Claim 1, characterised in that for successive measurements - each time the given number (n) of measurements of the same measured value is determined again - the position of the range of tolerance is determined afresh by means of the last measured value of these measurements.
  3. A method according to Claims 1 or 2, characterised in that, for determining the width (2 x T) of the range of tolerance, no printed sheet is pulled off in the first operating cycle and the measured value is retained as the calibration value (Ro), that in the second cycle a printed sheet is pulled off, the thickness of which is measured and the calibration value (Ro) is subtracted from this measured value (M1), and that a function of this differential value (M1 - Ro) is determined as the width of the range of tolerance.
  4. A method according to any one of Claims 1 to 3, characterised in that if several sheet feeders are present the assembled book blocks are rejected by means of a control pulse until the location of the range of tolerance for all sheet feeders is established and that control pulses for rejecting defective book blocks are only triggered thereafter.
  5. A method according to any one of Claims 1 to 4, characterised in that the drive of the machine is stopped by means of a control pulse if the same departure from the range of tolerance is measured at a sheet feeder three times in succession.
  6. An assembling machine for carrying out the method according to Claim 1, with at least one sheet feeder (1) which is disposed on a feeder device (2), and with a thickness measuring device (3 to 5) for the pulled off printed sheets, in which the range of tolerance (± T) determined by a reference value (R) can be stored, with which thickness measuring device the machine drive (14) and/or a set of reject points (13) in the feeder device (2) can be operated, characterised in that the means (3 to 5) determine n successive values which are substantially the same and determine the location of the range of tolerance (± T) with the last of these measured values.
  7. An assembling machine according to Claim 6, characterised in that if the means (3 to 5) determine the given number (n) of measurements of the same measured value each time, they determine the location of the range of tolerance afresh by means of the last measured value of these n measurements.
  8. An assembling machine according to Claim 6, characterised in that the means (3 to 5) close the vacuum valve (6) of the suction grippers during the first operating cycle and retain the measured gauge value as the calibration value (Ro), and that they trigger the vacuum valve (6) on the second operating cycle in order to activate the suction grippers, subtract the calibration value (Ro) from the second measured value (M1), and retain the width (± T) of the range of tolerance as a function of the differential value.
  9. An assembling machine with a multiplicity of sheet feeders (1) according to any one of Claims 6 to 8, characterised in that a control system (7 to 12) exists, which closes the set of reject points (13) if the location of the range of tolerance (M1 ± T) is established for all thickness measuring devices (3 to 5).
  10. An assembling machine according to Claim 6, characterised in that the means (3 to 5) determines three successive measured values with the same departure from the range of tolerance (M1 ± T) and stops the machine drive (14).
EP87115213A 1986-12-18 1987-10-17 Method for monitoring printed sheets in a collator Expired - Lifetime EP0271666B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87115213T ATE84012T1 (en) 1986-12-18 1987-10-17 METHOD OF MONITORING PRINTED SHEET IN A GOLLER MACHINE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH5049/86A CH672776A5 (en) 1986-12-18 1986-12-18
CH5049/86 1986-12-18

Publications (3)

Publication Number Publication Date
EP0271666A2 EP0271666A2 (en) 1988-06-22
EP0271666A3 EP0271666A3 (en) 1990-07-18
EP0271666B1 true EP0271666B1 (en) 1992-12-30

Family

ID=4287093

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87115213A Expired - Lifetime EP0271666B1 (en) 1986-12-18 1987-10-17 Method for monitoring printed sheets in a collator

Country Status (6)

Country Link
US (1) US4966354A (en)
EP (1) EP0271666B1 (en)
JP (1) JP2825811B2 (en)
AT (1) ATE84012T1 (en)
CH (1) CH672776A5 (en)
DE (1) DE3783346D1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5265733A (en) * 1989-02-22 1993-11-30 Hadewe B.V. Method of checking the composition of multilayer units composed of sheetlike parts and apparatus for composing, and checking the composition of, such units
US5526939A (en) * 1989-02-22 1996-06-18 Hadewe B.V. Method of checking the composition of multilayer units composed of sheetlike parts and apparatus for composing, and checking the composition of, such units
CA2010094A1 (en) * 1989-03-09 1990-09-09 Robert R. Butler Binding line book tracking system and method
US5321624A (en) * 1992-10-06 1994-06-14 Bell & Howell Phillipsburg Company Insertion machine having multiple document detector
US5437445A (en) * 1992-10-08 1995-08-01 Pitney Bowes Inc. Method and apparatus for detecting double fed sheets
NL9202297A (en) * 1992-12-31 1994-07-18 Hadewe Bv Method and device for checking whether documents are separated from an opened envelope.
JPH0924605A (en) * 1995-06-22 1997-01-28 Grapha Holding Ag Method and apparatus for optimizing treatment efficiency of apparatus for treating sheet or printing sheet and insert into bound product
US6237908B1 (en) 1999-03-02 2001-05-29 R. R. Donnelley & Sons Company Electronic book verification system
US7346206B2 (en) * 2003-06-20 2008-03-18 Hewlett-Packard Development Company, L.P. Optical object detector
ATE357404T1 (en) * 2003-12-19 2007-04-15 Ferag Ag CONTROLLING A DEVICE FOR COLLECTING FLEXIBLE PRODUCTS

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Publication number Priority date Publication date Assignee Title
CH425721A (en) * 1965-11-08 1966-12-15 Mueller Hans Grapha Masch Support table for a sheet gathering machine
US3561752A (en) * 1968-07-29 1971-02-09 Chicago Machinery Lab Inc Signature machines
US3519264A (en) * 1969-06-25 1970-07-07 Clement Co J W Collating system with malfunction control
US4170346A (en) * 1977-11-03 1979-10-09 Harris Corporation Bindery caliper
DD201434A1 (en) * 1981-10-26 1983-07-20 Rolf Boettcher Collator
JPS5897603A (en) * 1981-12-07 1983-06-10 Omron Tateisi Electronics Co Thickness detector for paper sheet or the like
DE3270835D1 (en) * 1982-03-01 1986-06-05 Christian Pierre Bourg Sheet collator
JPS60110350U (en) * 1983-12-27 1985-07-26 富士ゼロックス株式会社 Transfer paper double feed detection device
DE3424665A1 (en) * 1984-07-05 1986-02-06 Kolbus GmbH & Co KG, 4993 Rahden Method for monitoring printing units

Also Published As

Publication number Publication date
EP0271666A2 (en) 1988-06-22
JPS63171742A (en) 1988-07-15
CH672776A5 (en) 1989-12-29
ATE84012T1 (en) 1993-01-15
JP2825811B2 (en) 1998-11-18
US4966354A (en) 1990-10-30
DE3783346D1 (en) 1993-02-11
EP0271666A3 (en) 1990-07-18

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