EP1421022B1 - Method and device for identifying double feeds - Google Patents
Method and device for identifying double feeds Download PDFInfo
- Publication number
- EP1421022B1 EP1421022B1 EP02772021A EP02772021A EP1421022B1 EP 1421022 B1 EP1421022 B1 EP 1421022B1 EP 02772021 A EP02772021 A EP 02772021A EP 02772021 A EP02772021 A EP 02772021A EP 1421022 B1 EP1421022 B1 EP 1421022B1
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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
- B65H7/12—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 responsive to double feed or separation
- B65H7/125—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 responsive to double feed or separation sensing the double feed or separation without contacting the articles
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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
- B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
- B65H29/12—Delivering or advancing articles from machines; Advancing articles to or into piles by means of the nip between two, or between two sets of, moving tapes or bands or rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2301/00—Handling processes for sheets or webs
- B65H2301/40—Type of handling process
- B65H2301/44—Moving, forwarding, guiding material
- B65H2301/443—Moving, forwarding, guiding material by acting on surface of handled material
- B65H2301/4431—Moving, forwarding, guiding material by acting on surface of handled material by means with operating surfaces contacting opposite faces of material
- B65H2301/44316—Moving, forwarding, guiding material by acting on surface of handled material by means with operating surfaces contacting opposite faces of material between belts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2301/00—Handling processes for sheets or webs
- B65H2301/40—Type of handling process
- B65H2301/44—Moving, forwarding, guiding material
- B65H2301/445—Moving, forwarding, guiding material stream of articles separated from each other
- B65H2301/4451—Moving, forwarding, guiding material stream of articles separated from each other forming a stream or streams of separated articles
- B65H2301/44514—Separating superposed 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
- B65H2301/00—Handling processes for sheets or webs
- B65H2301/40—Type of handling process
- B65H2301/44—Moving, forwarding, guiding material
- B65H2301/447—Moving, forwarding, guiding material transferring material between transport devices
- B65H2301/4474—Pair of cooperating moving elements as rollers, belts forming nip into which material is transported
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2404/00—Parts for transporting or guiding the handled material
- B65H2404/20—Belts
- B65H2404/26—Particular arrangement of belt, or belts
- B65H2404/269—Particular arrangement of belt, or belts other arrangements
- B65H2404/2691—Arrangement of successive belts forming a transport path
-
- 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
- B65H2513/00—Dynamic entities; Timing aspects
- B65H2513/10—Speed
-
- 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
- B65H2553/00—Sensing or detecting means
- B65H2553/40—Sensing or detecting means using optical, e.g. photographic, elements
- B65H2553/41—Photoelectric detectors
- B65H2553/414—Photoelectric detectors involving receptor receiving light reflected by a reflecting surface and emitted by a separate emitter
-
- 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
-
- 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
- B65H2701/19—Specific article or web
- B65H2701/1916—Envelopes and articles of mail
Definitions
- the invention relates to a method and an arrangement for Recognition of double copies according to the preambles of the claims 1 and 6.
- the present invention is therefore based on the object a method and apparatus for detecting shipment overlaps to create, with whose help the overlaps regardless of the size of the items and their position to each other be recognized.
- one of the two transport speeds is the rated speed of the shroud system and the coefficient of friction of the driven at nominal speed means of transport is greater than the coefficient of friction of the driven with deviating speed means of transport.
- the speed deviating from the rated speed is brought back to the rated speed before the transfer.
- the relocation process low interference even with broadcasts takes place with different lengths, has the transport section to the shipment shift in an advantageous embodiment on each side of the broadcast one from the rest of the shroud system separate, controlled powered, rotating shroud with own drive.
- the length of the shifting shroud area, its distances to the incoming and outgoing shrouds of the shroud system are so big and the acceleration and braking is started and stopped that at an overlap the Einwirkmother the length of shortest consignment and the consignments to be processed Length spectrum while moving not in the incoming and outgoing shrouds are taken.
- the broadcasts are conveyed in the normal case individually one after the other with a feeding part 3 of the shroud system to the transport section for shipment shift and transported away with a laxative part 4.
- the deflecting roles of the shrouds are offset from each other so that the broadcasts are almost uninterrupted guided at least one side while the last clamping points K1, K2 and K3, K4 are as far away from each other to provide the necessary routes for accelerating or decelerating without while the broadcasts are still clamped in the feeding part 3 of the shroud system.
- At the rear portion of the feeding part there is a light barrier Li and on both sides of the transport path a measuring means La1, La2 for detecting edges.
- measuring means La3, La4 are arranged for detecting edges on both sides of the transport path.
- the transport section for shipment shift consists of two endless, separately driven over pulleys 1.2 shrouds that pinch the items during transport. The fact that all pulleys are staggered, their storage may be rigid even with different thickness shipments, without causing jamming.
- the beginning and end of the shifting section is defined by the clamping points K2 and K3, ie by the first clamping on the rear incoming deflection roller 2 and the last clamping on the front outgoing deflection roller.
- the nominal transport speed of the shroud system in the incoming and outgoing parts has the value V0, the shroud with the guide roller 1 (in the side view, the rear shroud) runs at the speed V1 and the shroud with the guide roller 2 at the speed V2.
- the leading edge of the photocell Li whose distance from the first nip is longer than the longest run is the leading leading edge (the leading edge of the leading overlapped transfer) detected.
- the measuring means La1, La2 for edge detection.
- FIG 2 the viewer from the rear broadcasts, which are driven at the speed V1, partially overlapped by the front broadcasts.
- a) shows the special case that two programs of the same length are overlapped without any lateral offset.
- the shift forward takes place on the premise that the gap to the preceding consignment does not fall below the minimum value despite the shift. At critical values, the differential speed ⁇ V is reduced.
- the velocity V1 V0 is maintained and the speed of the front shroud V2 is increased depending on the size of the mailpieces whose location to each other the size of the gaps or reduced.
- a reduction or increase in the speed V2 to V0 takes place before the transfer of the consignment / s to the discharging part 4 of the shroud system.
- the edges are detected on both sides again by means of the measuring means La3, La4 for edge detection and their distances to the previously leading leading edge. If there is a deviation from the previous measurement or if an additional edge is recorded, there is an overlap.
- the position of the originally leading leading edge is determined in this example indirectly via the transport speed and the line cycle.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Controlling Sheets Or Webs (AREA)
- Sorting Of Articles (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren und eine Anordnung zum
Erkennen von Doppelabzügen nach den Oberbegriffen der Ansprüche
1 und 6.The invention relates to a method and an arrangement for
Recognition of double copies according to the preambles of the
Ein bei Vereinzelungsvorrichtungen auftretendes Problem besteht in sogenannten Doppelabzugsfehlern, die sich daraus ergeben, dass zusätzlich zu der von einem Stapel abzuziehende Sendung eine weitere Sendung mit abgezogen wird. In Verteilanlagen für flache Sendungen sind die nicht erkannten Doppelabzüge von besonderer Bedeutung, da diese die Fehlverteilungsrate durch Lesefehler der automatischen Anschriftenerkennung erhöhen, aber auch einen Sendungsstau mit Sendungszerstörung zur Folge haben können.There is a problem with singulation devices in so-called double deduction errors resulting from that in addition to being deducted from a pile Shipment another shipment is deducted. In distribution systems for flat shipments are the unrecognized double prints Of particular importance, as these are the miscalculation rate by read errors of the automatic address recognition increase, but also a shipment traffic jam with consignment destruction can result.
Bei einer bekannten Lösung werden bewegbare Sendungsteile temporär senkrecht zur Fördervorrichtung ausgelenkt. Durch Auswertung des Rückschnellverhaltens der Sendungen wird dann das Vorliegen von überlappten Sendungen detektiert (EP 0 650 911 B1). Da ein unterschiedlicher Versatz der überlappten Sendungen vorliegen kann, muss die Auslenkung sowohl sendungsfrontseitig als auch sendungsrückseitig erfolgen, was erhöhten Aufwand zur Folge hat. Nachteilig ist auch die mechanische Beanspruchung der Sendungen bei der Auslenkung. Ein weiterer Mangel dieser Lösung besteht darin, dass der Versatz der Hinterkanten einen Mindestwert (ca. 10 mm) nicht unterschreiten darf.In a known solution are movable consignment parts temporarily deflected perpendicular to the conveyor. By Evaluation of the Rückschnellverhaltens the broadcasts is then the presence of overlapped broadcasts detected (EP 0 650 911 B1). Because a different offset of the overlapped Shipments, the deflection must be both broadcast front side as well as on the back of the broadcast, what increased effort results. Another disadvantage is the mechanical Loading of the shipments at the deflection. One Another shortcoming of this solution is that the offset the rear edges do not fall below a minimum value (about 10 mm) may.
In einer anderen bekannten Lösung wird das Profil der Sendungshöhe gemessen und bei einem Höhensprung wird eine Überlappung gemeldet (DE 196 25 044 A1).In another known solution, the profile of the shipment height measured and at a height jump becomes an overlap reported (DE 196 25 044 A1).
Es bestehen Möglichkeiten von Überlappungen zweier Sendungen, welche durch die o.g. Lösungen nicht erkannt werden können. There are possibilities of overlaps of two programs, which by the o.g. Solutions can not be detected.
Dies ist insbesondere bei identischen, deckungsgleichen Sendungen der Fall. Es ist jedoch auch möglich, dass eine größte Sendung eine kleinste so abdeckt, dass ein Doppelabzug unerkannt weiter transportiert wird.This is especially true for identical, congruent shipments the case. However, it is also possible that a largest Broadcast a smallest so covers that a double deduction undetected is transported further.
Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, ein Verfahren und eine Anordnung zum Erkennen von Sendungsüberlappungen zu schaffen, mit deren Hilfe die Überlappungen unabhängig von der Größe der Sendungen und deren Lage zueinander erkannt werden.The present invention is therefore based on the object a method and apparatus for detecting shipment overlaps to create, with whose help the overlaps regardless of the size of the items and their position to each other be recognized.
Erfindungsgemäß wird diese Aufgabe durch die Merkmale der Patentansprüche
1 und 6 gelöst.According to the invention, this object is achieved by the features of the
Nach der Ermittlung von Vorder- und Hinterkanten der Sendungen und der Sendungslücken mittels Lichtschranken werden folgende Schritte mit Hilfe der Anordnung durchgeführt:
- Detektieren von Kanten auf beiden Seiten des Transportpfades und Ermitteln der Abstände der detektierten Kanten von der jeweiligen führenden, mit der Lichtschranke (Li) gemessenen Vorderkante,
- Einwirken mit beidseitig unterschiedlichen Transportgeschwindigkeiten mittels Reibkraft auf die freien Längsseiten der vereinzelten Sendungen in einem Transportabschnitt zur Sendungsverschiebung nach der Kantendetektion, wobei die Wahl der differierenden Transportgeschwindigkeiten so erfolgt, dass bei einer Überlappung die Sendungen so zueinander verschoben werden würden, dass die Mindestlücken nicht unterschritten werden, wobei die Einwirklängen und - zeitpunkte so gewählt sind, dass an jeder Seite immer nur eine Sendung gefasst wird,
- Ermitteln der Kanten auf beiden Sendungsseiten, der führenden Vorderkanten und der Abstände der Kanten von der jeweiligen führenden Vorderkante noch einmal nach der Verschiebung der Sendungen zueinander und Detektieren einer Überlappung bei mindestens einem gegenüber den ersten Messungen veränderten Abstand zwischen den einander entsprechenden Kanten und der jeweiligen führenden Vorderkante oder zusätzlichen Kanten.
- Detecting edges on both sides of the transport path and determining the distances of the detected edges from the respective leading edge measured with the light barrier (Li),
- Acting on both sides with different transport speeds by means of frictional force on the free longitudinal sides of the individual shipments in a transport section for shipment shift after edge detection, the choice of differing transport speeds is such that in an overlap transmissions would be moved to each other so that the minimum gaps are not exceeded , the Einwirklängen and - times are chosen so that on each side only one consignment is taken,
- Determining the edges on both sides of the mail, the leading leading edges and the distances of the edges of the respective leading leading edge again after the transmission of the programs to each other and detecting an overlap at least one compared to the first measurements changed distance between the corresponding edges and the respective leading Leading edge or additional edges.
Durch das zweimalige Messen der Abstände der beidseitig ermittelten Kanten von der jeweiligen Vorderkante vor und nach dem Einwirken mit beidseitig unterschiedlichen Transportgeschwindigkeiten mittels Reibkraft auf die Sendungen und der entsprechenden Auswertung ist es einerseits möglich, durch Laschen oder Sichtfenster erzeugte Kanten von Vorderkanten überlappter nachfolgender Sendungen zu unterscheiden und damit ein falsches Aussortieren zu vermeiden, und andererseits kleine, hinter großen Sendungen verdeckt befindliche Sendungen als Überlappungen zu erkennen und zur Vermeidung von beispielsweise Fehlsortierungen anschließend auszuschleusen.By measuring the distances of the two sides determined twice Edges from the respective front edge before and after the interaction with mutually different transport speeds by friction on the shipments and the appropriate evaluation, it is possible, on the one hand, by Tabs or viewing windows created edges of leading edges overlapping subsequent programs to distinguish and thus to avoid wrong sorting and on the other hand small, concealed behind large broadcasts shipments to recognize as overlaps and to avoid for example Subsequently remove the wrong sortings.
Damit das Ausschleusen über eine Weichenanordnung schnell und sicher erfolgen kann, werden dabei die überlappten Sendungen so verschoben, dass die dafür notwendigen Mindestlücken zwischen Sendungen nicht unterschritten werden.Thus, the removal via a points arrangement quickly and can be done safely, while the overlapped broadcasts shifted so that the necessary minimum gaps between Shipments are not undershot.
Vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen dargestellt.Advantageous embodiments of the invention are in the subclaims shown.
Damit einzelne Sendungen den Transportabschnitt zur Sendungsverschiebung
ohne ungewollte Lückenverschiebungen durchlaufen,
ist es vorteilhaft, wenn eine der beiden Transportgeschwindigkeiten
die Nenngeschwindigkeit des Deckbandsystems
ist und der Reibungskoeffizient des mit Nenngeschwindigkeit
angetriebenen Transportmittels größer als der Reibungskoeffizient
des mit dazu abweichender Geschwindigkeit angetriebenen
Transportmittels ist.
Um zusätzliche Beanspruchungen der Sendungen bei der Übergabe
an den nachfolgenden Abschnitt des Deckbandsystems zu vermeiden,
wird vor der Übergabe die von der Nenngeschwindigkeit
abweichende Geschwindigkeit wieder auf die Nenngeschwindigkeit
gebracht. In order that individual shipments pass through the transport section for shipment shift without unwanted gap displacements, it is advantageous if one of the two transport speeds is the rated speed of the shroud system and the coefficient of friction of the driven at nominal speed means of transport is greater than the coefficient of friction of the driven with deviating speed means of transport.
In order to avoid additional stresses on the consignments when transferring them to the subsequent section of the shroud system, the speed deviating from the rated speed is brought back to the rated speed before the transfer.
Es ist möglich, die führenden Vorderkanten nach dem Transportabschnitt zur Sendungsverschiebung direkt mittels einer weiteren Lichtschranke oder indirekt aus den Signalen der vor dem Transportabschnitt zur Sendungsverschiebung angeordneten Lichtschranke mit Hilfe des Streckentaktes zu ermitteln.It is possible to have the leading leading edges after the transport section to the shipment shift directly by means of a another photocell or indirectly from the signals of the front arranged the transport section for shipment shift Photoelectric sensor using the track clock to determine.
Damit der Verschiebeprozess störungsarm auch bei Sendungen mit unterschiedlichen Längen erfolgt, besitzt der Transportabschnitt zur Sendungsverschiebung in vorteilhafter Ausgestaltung auf jeder Sendungsseite ein vom übrigen Deckbandsystem getrenntes, gesteuert angetriebenes, umlaufendes Deckband mit eigenem Antrieb. Die Länge des verschiebenden Deckbandbereiches, seine Abstände zu den zu- und abführenden Deckbändern des Deckbandsystems sind so groß und die Beschleunigungs- und Bremsvorgänge werden so gestartet und beendet, dass bei einer Überlappung die Einwirklänge der Länge der kürzesten Sendung entspricht und die Sendungen im zu verarbeitenden Längenspektrum während ihres Verschiebens nicht in den zu- und abführenden Deckbändern gefasst sind.Thus, the relocation process low interference even with broadcasts takes place with different lengths, has the transport section to the shipment shift in an advantageous embodiment on each side of the broadcast one from the rest of the shroud system separate, controlled powered, rotating shroud with own drive. The length of the shifting shroud area, its distances to the incoming and outgoing shrouds of the shroud system are so big and the acceleration and braking is started and stopped that at an overlap the Einwirklänge the length of shortest consignment and the consignments to be processed Length spectrum while moving not in the incoming and outgoing shrouds are taken.
Vorteilhaft ist es dabei, die Steuereinrichtung so auszuführen, dass eine Beschleunigungsphase erst dann gestartet wird, wenn die erste detektierte Kante nach der Vorderkante die in Transportrichtung letzte Klemmstelle des Transportabschnittes zur Sendungsverschiebung gerade verlassen hat und dass eine Bremsphase beendet wird, bevor die Hinterkante der kürzesten zu verschiebenden Sendung die in Transportrichtung erste Klemmstelle erreicht hat.It is advantageous in this case to execute the control device in such a way that that an acceleration phase is only started if the first edge detected after the leading edge is the one in Transport direction last nip of the transport section has just left the shipment shift and that one Braking phase is completed before the trailing edge of the shortest to be moved to the first shipment in the transport direction Has reached terminal point.
Anschließend wird die Erfindung in einem Ausführungsbeispiel anhand der Zeichnungen näher erläutert.Subsequently, the invention in an embodiment explained in more detail with reference to the drawings.
Dabei zeigen
- FIG 1
- eine Draufsicht auf ein Deckbandsystem mit einem Transportabschnitt zur Sendungsverschiebung;
- FIG 2 und 3
- eine Darstellung verschiedener Überlappungsvarianten mit der Angabe, welche Sendung verschoben wird.
- FIG. 1
- a plan view of a shroud system with a transport section for shipment shift;
- FIGS. 2 and 3
- a representation of different overlapping variants with the indication of which consignment is being moved.
Die Sendungen werden im Normalfall einzeln nacheinander mit
einem zuführenden Teil 3 des Deckbandsystems zum Transportabschnitt
zur Sendungsverschiebung befördert und mit einem abführenden
Teil 4 abtransportiert. Die umlenkenden Rollen der
Deckbänder sind gegeneinander so versetzt, dass die Sendungen
fast ohne Unterbrechung mindestens einseitig geführt sind und
dabei die letzten Klemmpunkte K1,K2 und K3,K4 möglichst weit
voneinander entfernt sind, um die notwendigen Strecken zum
Beschleunigen oder Abbremsen bereitzustellen, ohne dass dabei
die Sendungen noch im zuführenden Teil 3 des Deckbandsystems
geklemmt sind. Am hinteren Abschnitt des zuführenden Teils
befindet sich eine Lichtschranke Li und an beiden Seiten des
Transportpfades ein Messmittel La1,La2 zum Detektieren von
Kanten. Am Beginn des abführenden Teils 4 des Deckbandsystems
sind dementsprechend ebenfalls an beiden Seiten des Transportpfades
Messmittel La3,La4 zum Detektieren von Kanten angeordnet.
Der Transportabschnitt zur Sendungsverschiebung besteht aus
zwei endlosen, separat über Umlenkrollen 1,2 angetriebenen
Deckbändern, die die Sendungen beim Transport einklemmen. Dadurch,
dass alle Umlenkrollen versetzt angeordnet sind, kann
ihre Lagerung auch bei unterschiedlich dicken Sendungen starr
sein, ohne dass es zu Verklemmungen kommt. Beginn und Ende
des verschiebenden Abschnittes wird durch die Klemmstellen
K2 und K3 definiert, d.h. durch die erste Klemmung an der
hinteren einlaufenden Umlenkrolle 2 und die letzte Klemmung
an der vorderen auslaufenden Umlenkrolle. Die Nenntransportgeschwindigkeit
des Deckbandsystems in den zu- und abführenden
Teilen hat den Wert V0, das Deckband mit der Umlenkrolle
1 (bei der Seitenansicht das hintere Deckband) läuft mit
der Geschwindigkeit V1 und das Deckband mit der Umlenkrolle 2
mit der Geschwindigkeit V2. The broadcasts are conveyed in the normal case individually one after the other with a
The transport section for shipment shift consists of two endless, separately driven over pulleys 1.2 shrouds that pinch the items during transport. The fact that all pulleys are staggered, their storage may be rigid even with different thickness shipments, without causing jamming. The beginning and end of the shifting section is defined by the clamping points K2 and K3, ie by the first clamping on the rear
Befinden sich aufgrund eines Doppelabzuges zwei überlappte
Sendungen (Überlappung) im zuführenden Teil 3 des Deckbandsystems,
so wird als erstes von der Lichtschranke Li, deren
Entfernung vom ersten Klemmpunkt größer als die längste Sendung
ist, die führende Vorderkante (die Vorderkante der führenden
überlappten Sendung) detektiert. Gleich daneben befinden
sich die Messmittel La1,La2 zur Kantendetektion. Bevor
die überlappten Sendungen also im Transportabschnitt zur Sendungsverschiebung
gefasst werden, sind die Sendungslücken zur
vorauslaufenden und nachfolgenden Sendung, die Sendungslänge
und sämtliche Kanten bekannt.
Damit kann festgelegt werden, welches der beiden Deckbänder
des Transportabschnittes zum Verschieben mit welcher Geschwindigkeit
während des Passierens dieser überlappten Sendungen
laufen muss, damit die Sendungen so gegeneinander verschoben
werden, dass die Verschiebungen identifizierbar sind,
die Lücken aber zu den vorauslaufenden und nachfolgenden Sendungen
einen Mindestwert nicht unterschreiten, der zum störungsfreien
Auslenken in nachfolgenden Weichenanordnungen
notwendig ist.If there are two overlapped shipments (overlap) in the
This can be used to determine which of the two shrouds of the transport section has to move at which speed during the passage of these overlapped programs, so that the programs are shifted from each other so that the shifts are identifiable, but the gaps to the leading and trailing transmissions a minimum value not lower, which is necessary for trouble-free deflection in subsequent Weichenanordnungen.
In den FIG 2 und 3 sind Beispiele zum Verschieben, abhängig von der Größe und gegenseitigen Lage, überlappter Sendungen dargestellt, wobei über die Höhe der Differenzgeschwindigkeit zur Nenngeschwindigkeit der Übersicht halber keine Aussagen gemacht werden.In Figures 2 and 3 are examples for moving, dependent from the size and mutual location, overlapped shipments shown, being over the height of the differential speed for nominal speed, for the sake of clarity, no statements be made.
In der FIG 2 sind die vom Betrachter aus hinteren Sendungen,
die mit der Geschwindigkeit V1 angetrieben werden, durch die
vorderen Sendungen teilweise überlappt.
Als erstes ist unter a) der Sonderfall gezeigt, dass zwei
gleich lange Sendungen ohne seitlichen Versatz überlappt
sind. Eines von den beiden Deckbändern wird mit der Nenngeschwindigkeit
V0 angetrieben (V1) und das andere mit der Geschwindigkeit
V2=ΔV+V0 , so dass nach dem Verschieben vorn
eine zusätzliche Kante gemessen und damit ein Doppelabzug
identifiziert wird. Es spielt in diesem Falle keine Rolle,
welches der beiden Deckbänder mit der von V0 abweichenden Geschwindigkeit
angetrieben wird.
Die Verschiebung nach vorn erfolgt unter der Voraussetzung,
dass die Lücke zur vorauslaufenden Sendung trotz der Verschiebung
den Mindestwert nicht unterschreitet. Bei kritischen
Werten erfolgt eine Verminderung der Differenzgeschwindigkeit
ΔV.In FIG 2, the viewer from the rear broadcasts, which are driven at the speed V1, partially overlapped by the front broadcasts.
First of all, a) shows the special case that two programs of the same length are overlapped without any lateral offset. One of the two shrouds is driven at the rated speed V0 (V1) and the other at speed V2 = ΔV + V0, so that after the shift an additional edge is measured in front to identify a double trigger. It does not matter in this case, which of the two shrouds is driven at the speed deviating from V0.
The shift forward takes place on the premise that the gap to the preceding consignment does not fall below the minimum value despite the shift. At critical values, the differential speed ΔV is reduced.
Unter b) ist ein weiterer Sonderfall aufgeführt:
Die Sendungen sind sehr lang und an der Grenze der vereinbarten
Zulässigkeit. Durch die teilweise Überlappung wird durch
die Lichtschranke Li eine über der Zulässigkeit liegende Sendungslänge
ermittelt, was nur durch eine Überlappung hervorgerufen
werden kann. Aus diesem Grunde ist eine Verschiebung
der Sendungen zueinander nicht notwendig und beide Deckbänder
des Transportabschnittes zur Sendungsverschiebung werden mit
der Nenngeschwindigkeit V0 angetrieben. Im Falle c) wird die
vordere kleine Sendung, die gegenüber der hinteren größeren
Sendung mit der Vorderkante etwas zurückliegt nach vorn verschoben,
da die Lücke zur vorauslaufenden Sendung groß genug
ist. Wäre diese Lücke nahe der Mindestlücke, so würde die Geschwindigkeit
V2 der vorderen Sendung auf einen reduzierten
Wert V2=V0-ΔV heruntergefahren. Die Sendung wurde erst nach
vorn verschoben, da die Länge der kleinen Sendung an sich
nicht bekannt ist.In b) another special case is listed:
The shipments are very long and at the limit of the agreed permissibility. As a result of the partial overlap, the light barrier Li determines a transmission length lying above the permissibility, which can only be caused by an overlap. For this reason, a shift of the programs to each other is not necessary and both shrouds of the transport section for transmission shift are driven at the rated speed V0. In the case of c), the front small shipment, which is slightly behind the leading edge with the leading edge moved forward, since the gap to the leading broadcast is large enough. If this gap were close to the minimum gap, the speed V2 of the forward transmission would be reduced to a reduced value V2 = V0-ΔV. The program was only moved forward because the length of the small program is not known per se.
In den letzten beiden Beispielen der FIG 2 wurde die Verschiebung der vorderen kleinen Sendung nach vorn in Transportrichtung gewählt, da dadurch die Lücken nicht verkleinert werden.In the last two examples of FIG 2, the shift the front small consignment forward in the transport direction chosen, as this does not reduce the gaps become.
In der FIG 3 sind Beispiele angegeben, in denen die vom Betrachter aus hinteren Sendungen kleiner als die vorderen sind und von diesen teilweise oder vollständig bedeckt sind.In the 3 examples are given in which the viewer from rear broadcasts are smaller than the front ones and are partially or completely covered by these.
Unter a) ist ein dem Beispiel b) der FIG 2 entsprechender Sonderfall aufgeführt, bei dem auf Grund der Überschreitung der Maximallänge eine Überlappung identifiziert wird, so dass ein Verschieben nicht notwendig ist.Under a) is a the example b) of FIG 2 corresponding Special case listed, in which due to the excess the maximum length of an overlap is identified, so that a shift is not necessary.
Im Beispiel b) wird der hintere verdeckte Brief durch das
hintere Deckband mit der Geschwindigkeit V1=V0+A.V nach vorn
verschoben, da die vordere Lücke genügend groß ist.
Bei einer kleinen Lücke würde die verdeckte Sendung durch eine
verringerte Geschwindigkeit V1=V0-ΔV des hinteren Deckbandes
nach hinten verschoben werden.
In den letzten Beispielen c) und d) werden die hinteren Sendungen
durch eine Erhöhung der Geschwindigkeit des hinteren
Deckbandes auf V1=V0+ΔV nach vorn verschoben, da hierdurch
die Lücken beibehalten bzw. vergrößert werden.
Besitzt beispielsweise das vom Betrachter hintere Deckband
mit der Geschwindigkeit V1 einen höheren Reibungskoeffizienten,
um bei Einzelabzügen definierte Lücken beizubehalten,
wird die Geschwindigkeit V1=V0 beibehalten und die Geschwindigkeit
des vorderen Deckbandes V2 wird je nach Größe der
Sendungen, deren Lage zueinander Größe der Lücken vergrößert
oder verkleinert. Damit die Sendungen schonend transportiert
werden, erfolgt vor der Übergabe der Sendung/en an den abführenden
Teil 4 des Deckbandsystems eine Reduzierung bzw. Erhöhung
der Geschwindigkeit V2 auf V0.
Am Beginn des abführenden Teils 4 des Deckbandsystems werden
die Kanten beidseitig mittels der Messmittel La3,La4 zur Kantendetektion
noch einmal detektiert und ihre Abstände zur
ehemals führenden Vorderkante. Ergibt sich eine Abweichung
zur vorherigen Messung oder wird eine zusätzliche Kante verzeichnet,
so liegt eine Überlappung vor. Die Lage der ursprünglich
führenden Vorderkante wird in diesem Beispiel indirekt
über die Transportgeschwindigkeit und den Streckentakt
ermittelt.In example b), the rear hidden letter is shifted forward by the rear shroud at the speed V1 = V0 + AV since the front gap is sufficiently large.
With a small gap, the hidden program would be shifted backwards by a reduced speed V1 = V0-ΔV of the rear shroud.
In the last examples c) and d), the rear broadcasts are shifted forward by increasing the speed of the rear shroud to V1 = V0 + ΔV since this maintains or increases the gaps.
For example, if the observer's rear shroud has a higher coefficient of friction at speed V1 to maintain defined gaps in single prints, the velocity V1 = V0 is maintained and the speed of the front shroud V2 is increased depending on the size of the mailpieces whose location to each other the size of the gaps or reduced. In order to ensure that the consignments are transported gently, a reduction or increase in the speed V2 to V0 takes place before the transfer of the consignment / s to the discharging
At the beginning of the
Claims (10)
- Method of detecting overlaps in the case of flat items of mail which are transported one behind the other in a sandwich belt system, having at least one light barrier (Li) for detecting front and rear edges of the items of mail moving past it, item lengths and gaps being determined from the measurement results from said light barrier, characterized by the following steps:detecting edges on both sides of the transporting path and determining the spacings of the detected edges from the respective leading front edge measured by the light barrier (Li),following the edge detection, subjecting the free longitudinal sides of the separated items of mail to frictional force, with different transporting speeds on both sides, in a transporting segment for item displacement, the selection of the differing transporting speeds taking place such that, in the case of overlap, the items of mail would be displaced in relation to one another such that the gap dimensions do not fall below a minimum value, and the action-specific lengths and points in time being selected such that only ever one item of mail is gripped on each side,determining the edges on both item sides, the leading front edges and the spacings of the edges from the respective leading front edge once again following the displacement of the items of mail in relation to one another and detection of an overlap if at least one spacing between the mutually corresponding edges and the respective leading front edge or additional edges has changed in relation to the first measurements.
- Method according to Claim 1, characterized in that one of the two transporting speeds in the transporting segment for item displacement is the nominal speed of the sandwich belt system, and the coefficient of friction of the transporting means driven at the nominal speed is greater than the coefficient of friction of the transporting means driven at a speed which differs therefrom.
- Method according to Claim 1, characterized in that, in order to transfer the item or items of mail to the subsequent segment of the sandwich belt system, the speed which differs from the nominal speed is changed to the nominal speed.
- Method according to Claim 1, characterized in that, downstream of the transporting segment for item displacement, the leading front edges are detected by means of a further light barrier.
- Method according to Claim 1, characterized in that, downstream of the transporting segment for item displacement, the leading front edges are determined, at a certain location, indirectly from the signals of the light barrier arranged upstream of the transporting segment, with the aid of the known transporting speeds and of the section cycle time.
- Arrangement for detecting overlaps in the case of flat items of mail which are transported one behind the other in a sandwich belt system, having at least one light barrier (Li) for detecting front and rear edges of the items of mail moving past it, item lengths and gaps being determined from the measurement results from said light barrier, characterized bya transporting segment for item displacement in the sandwich belt system with independently activable transporting means which subject the free longitudinal sides of the separated items of mail to frictional force with different transporting speeds on both sides, the action-specific lengths and points in time being selected such that only ever one item of mail is gripped on each side,measuring means (La1 to La4) which are arranged on both sides of the transporting path and are intended for detecting edges upstream and downstream of the transporting segment for item displacement and for determining the spacings of the detected edges from the respective leading front edge,a control device for activating the transporting means of the transporting segment for item displacement in dependence on the measured edges on both sides of the transporting path, on their spacings from the respective leading front edges and on the respective gaps in relation to the adjacent items of mail, such that the different speeds are of such a magnitude that the gap dimensions do not fall below a minimum value following displacement,an evaluation device in which the measurements taken upstream and downstream of the transporting segment for item displacement for the spacings between the mutually corresponding edges on both sides of the transporting path and the respective leading front edge are compared and, in the case of deviations or additional edges, an overlap is detected.
- Arrangement according to Claim 6, characterized in that one of the two transporting means of the transporting segment for item displacement is driven at the nominal speed of the sandwich belt system, and in that the coefficient of friction of the transporting means driven at the nominal speed is greater than the coefficient of friction of the transporting means driven at a speed which differs therefrom.
- Arrangement according to Claim 7, characterized in that the transporting means in the transporting segment for item displacement at the speed which differs from the nominal speed is changed to the nominal speed again prior to transfer of the respective item or items of mail to the subsequent, discharging segment of the sandwich belt system.
- Arrangement according to Claim 8, characterized in that the transporting segment for item displacement, on each item side, has a circulating sandwich belt which is separate from the rest of the sandwich belt system, is driven in a controlled manner and has a dedicated drive, and the length of the displacing sandwich belt region, its spacings from the feeding and discharging sandwich belts (3, 4) of the sandwich belt system are of such a magnitude that, and the accelerating and braking operations are started and ended such that, in the case of overlap, the action-specific length corresponds to the length of the shortest item of mail and the items of mail in the length range which is to be processed are not gripped in the feeding and discharging sandwich belts during their displacement.
- Arrangement according to Claim 9, characterized in that the control device is configured such that an accelerating phase is only started when the first detected edge following the front edge has just left the final clamping location (K3) of the transporting segment for item displacement, as seen in the transporting direction, and in that a braking phase is ended before the rear edge of the shortest item of mail which is to be displaced has reached the first clamping location (K2), as seen in the transporting direction.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10142331 | 2001-08-30 | ||
DE10142331A DE10142331C1 (en) | 2001-08-30 | 2001-08-30 | Method and arrangement for detecting overlaps |
PCT/DE2002/002961 WO2003018449A1 (en) | 2001-08-30 | 2002-08-13 | Method and device for identifying double feeds |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1421022A1 EP1421022A1 (en) | 2004-05-26 |
EP1421022B1 true EP1421022B1 (en) | 2005-01-26 |
Family
ID=7696996
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02772021A Expired - Fee Related EP1421022B1 (en) | 2001-08-30 | 2002-08-13 | Method and device for identifying double feeds |
Country Status (4)
Country | Link |
---|---|
US (1) | US20040195760A1 (en) |
EP (1) | EP1421022B1 (en) |
DE (2) | DE10142331C1 (en) |
WO (1) | WO2003018449A1 (en) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4256251B2 (en) * | 2003-12-17 | 2009-04-22 | 株式会社東芝 | Paper sheet direction reversing device and paper sheet stamping device |
DE10361720B3 (en) * | 2003-12-30 | 2005-05-25 | Siemens Ag | Process for identifying overlapped letters in a transport path for consecutively transported letters comprises arranging two transport stages behind each other |
US7654521B2 (en) * | 2004-04-06 | 2010-02-02 | Eastman Kodak Company | Apparatus, method and program product for detecting article multifeed overlap |
JP4469671B2 (en) | 2004-07-09 | 2010-05-26 | 株式会社東芝 | Paper sheet take-out device |
DE102004037422B3 (en) * | 2004-07-30 | 2006-03-09 | Siemens Ag | Separating section for overlapped flat items in a standing position |
US20080223769A1 (en) * | 2007-03-15 | 2008-09-18 | Siemens Aktiengesellschaft | Method of singulating articles in a transport system |
US20090087014A1 (en) * | 2007-10-01 | 2009-04-02 | Lockheed Martin Corporation | Skew/doublefeed detection in scanned images |
DE102009039062A1 (en) | 2009-08-27 | 2011-03-10 | Siemens Aktiengesellschaft | Device and method for separating flat objects by means of two singler and a length detector |
DE102009039067A1 (en) * | 2009-08-27 | 2011-03-10 | Siemens Aktiengesellschaft | Device and method for separating flat objects by means of two laterally offset singler |
JP5451520B2 (en) * | 2010-05-14 | 2014-03-26 | 株式会社Pfu | Multifeed processing apparatus, multifeed processing method, and multifeed processing program |
DE102011004091A1 (en) | 2011-02-14 | 2012-08-16 | Siemens Aktiengesellschaft | Method and apparatus for sorting flat objects with gap variation |
JP5991902B2 (en) * | 2012-11-15 | 2016-09-14 | 日立オムロンターミナルソリューションズ株式会社 | Paper sheet conveying apparatus and paper sheet conveying method |
US10875729B2 (en) | 2016-04-28 | 2020-12-29 | Tritek Technologies, Inc. | Mail processing system and method with increased processing speed |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1210601B (en) * | 1960-08-15 | 1966-02-10 | Standard Elektrik Lorenz Ag | Photoelectric control device to recognize double draws |
US3937453A (en) * | 1974-08-02 | 1976-02-10 | Docutel Corporation | Single document transport |
JPS58167338A (en) * | 1982-03-24 | 1983-10-03 | Nec Corp | Apparatus for detecting case where two sheets of paper are delivered simultaneously |
JPH07115771B2 (en) * | 1989-02-01 | 1995-12-13 | 富士通株式会社 | Multiple paper sheet detection mechanism |
US5211387A (en) * | 1989-03-31 | 1993-05-18 | De La Rue Systems Limited | Method and apparatus for feeding articles |
IT1261545B (en) * | 1993-04-09 | 1996-05-23 | Finmeccanica Spa | SINGULARIZER DEVICE |
JPH0710322A (en) * | 1993-06-25 | 1995-01-13 | Toshiba Corp | Paper sheet transfer device |
DE4337004A1 (en) * | 1993-10-29 | 1995-05-04 | Licentia Gmbh | Device and method for detecting overlaps of flexible flat mail items |
US5659396A (en) * | 1995-06-07 | 1997-08-19 | Electrocom Automation L.P. | Dichotomous scan system for detection of edges of objects and overlapped objects having relatively uniform surfaces |
DE19625044A1 (en) * | 1996-06-22 | 1998-01-02 | Siemens Ag | Method for recognizing overlapping of flat items |
JP3731976B2 (en) * | 1997-05-23 | 2006-01-05 | 日立オムロンターミナルソリューションズ株式会社 | Double feed detection device and method |
DE19753419C1 (en) * | 1997-12-02 | 1999-02-18 | Siemens Ag | Speed adjuster for flat article conveyor |
NL1015266C2 (en) * | 2000-05-23 | 2001-12-14 | Koninkl Kpn Nv | Apparatus and method for detecting overlapping objects. |
DE10030226A1 (en) * | 2000-06-20 | 2002-01-03 | Giesecke & Devrient Gmbh | Sheet material stacking device and method for controlling the entry of sheet material into a stacker wheel |
-
2001
- 2001-08-30 DE DE10142331A patent/DE10142331C1/en not_active Expired - Fee Related
-
2002
- 2002-08-13 US US10/488,330 patent/US20040195760A1/en not_active Abandoned
- 2002-08-13 EP EP02772021A patent/EP1421022B1/en not_active Expired - Fee Related
- 2002-08-13 DE DE50202136T patent/DE50202136D1/en not_active Expired - Fee Related
- 2002-08-13 WO PCT/DE2002/002961 patent/WO2003018449A1/en active IP Right Grant
Also Published As
Publication number | Publication date |
---|---|
DE10142331C1 (en) | 2003-03-27 |
US20040195760A1 (en) | 2004-10-07 |
WO2003018449A1 (en) | 2003-03-06 |
EP1421022A1 (en) | 2004-05-26 |
DE50202136D1 (en) | 2005-03-03 |
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