EP1753681B1 - Device for reversal of direction of planar letters - Google Patents

Device for reversal of direction of planar letters Download PDF

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Publication number
EP1753681B1
EP1753681B1 EP05732326A EP05732326A EP1753681B1 EP 1753681 B1 EP1753681 B1 EP 1753681B1 EP 05732326 A EP05732326 A EP 05732326A EP 05732326 A EP05732326 A EP 05732326A EP 1753681 B1 EP1753681 B1 EP 1753681B1
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EP
European Patent Office
Prior art keywords
conveyor
postal items
postal
endless
driven
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Not-in-force
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EP05732326A
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German (de)
French (fr)
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EP1753681A1 (en
Inventor
Göran KEIL
Armin Zimmermann
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Siemens AG
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Siemens AG
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H29/00Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/58Article switches or diverters
    • B65H29/60Article switches or diverters diverting the stream into alternative paths
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H15/00Overturning articles
    • B65H15/008Overturning articles employing belts
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00Handling processes for sheets or webs
    • B65H2301/30Orientation, displacement, position of the handled material
    • B65H2301/33Modifying, selecting, changing orientation
    • B65H2301/333Inverting
    • B65H2301/3331Involving forward reverse transporting means
    • B65H2301/33314Involving forward reverse transporting means forward reverse belts
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00Handled material; Storage means
    • B65H2701/10Handled articles or webs
    • B65H2701/19Specific article or web
    • B65H2701/1916Envelopes and articles of mail
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S271/00Sheet feeding or delivering
    • Y10S271/902Reverse direction of sheet movement

Definitions

  • the invention relates to a device for reversing the direction of flat shipments in consignment sorting systems with feeding and discharging cover belt conveyors.
  • this distribution information must be in fixed positions. If this is not the case, the consignments must be brought by rotation about their longitudinal and / or vertical axis in the working position.
  • JP-A-61-64658 a device for reversing the direction of flat objects by means of rollers described.
  • the successively supplied items alternately passed over a switch in two reversibly driven conveyor lines. While an object is being transported in the one conveyor line, the respective preceding object is simultaneously conveyed out of the other conveyor line again.
  • the invention has for its object to provide a low-cost device for reversing the direction of flat shipments in consignment sorting with incoming and outgoing shroud conveyors, with a collision-free rotation of flat, with small intervals successive programs is possible about its vertical axis.
  • the feeding shroud conveyor consisting of two endless circulating belts, between which the shipments are trapped in a row, follows a switch for splitting the programs alternately on two apart at an acute angle Deckbandtransportrangen with two endless belts, which each one controlled and reversible drivable conveyor line, in which the items are also transported clamped, connects.
  • Both conveyor sections can be driven by a drive roller arranged between them and the items can be guided around the drive roller in such a wrap angle that the items can be braked and accelerated approximately slip-free, taking into account the frictional forces.
  • Each conveyor line is designed so that the items can be routed during return transport at an acute angle to the respective feeding shroud transport path in a laxative shroud transport means with two endless, circulating belts.
  • the braking process is only started when the trailing edge of the respective program has left the shroud transport path. At any time, the broadcasts are frictionally guided in the device.
  • a further possibility for the low-effort execution of the controlled and reversibly drivable conveyor lines, but with limited range of broadcast formats, is to provide for these in each case an outer, endless shroud, which is guided over two pulleys, and the common drive roller.
  • the flat programs 30, 31, 32 are alternately directed by way of a cover belt conveying means 1, not shown in detail here, and a controllable switch 2 to two feeding conveyor belt conveyor sections which run apart at an acute angle.
  • the right-hand cover belt transport path consists of a first endless belt 3, which is deflected and returned via a first deflection roller 4, and a second endless belt 5, which is deflected and returned via a second deflection roller 6.
  • the left shroud transport path also consists of a third endless belt 9, which is deflected and returned via a third deflection roller 10, and a fourth endless belt 11, which is deflected and returned via a fourth deflection roller 12.
  • Each shroud conveyor route directs the shipments into a controlled and reversibly driven conveyor line. Both conveyor lines converge in the inlet direction at an acute angle.
  • the conveyor belt section following the right conveyor belt conveyor consists of a fifth, outer endless belt 15, which is deflected by two deflection rollers 16 and a sixth, inner endless belt 17, which runs over a larger drive roller 18 and a smaller guide roller 19.
  • This endless belt 17 is at the same time on the opposite side, the inner endless belt of the left cover belt transport path following conveyor line, which still has a seventh, outer endless belt 20, which is deflected over two pulleys 21 has.
  • the deflection rollers 16, 21 of the conveyor lines located close to each other are at such a distance from one another that the thickest packages 30, 31, 32 that do not need to be transported back or that are longer than the reversible conveyor line, pass through the gap between the deflection rollers 16, 21 can be fed freely to a following means of transport. Since the transport directions of the shroud transport paths and the respective subsequent conveyor lines are inclined to each other, there is a necessary angle of wrap, with which the programs 30,31,32 are guided around the drive drum 18. Since the conveyor lines are inclined inwards, the consignments 30,31,32 are passed on the outside back to the feeding Deckbandtransportrangen and the feeding Deckbandanisch 1 on both sides in laxative Deckbandtransportstoff.
  • FIGS. 2a-d The timing is based on the FIGS. 2a-d illustrated.
  • the first consignment 30 of the incoming consignment stream has left the upper or in the feed direction the right conveying path 50 and is reversed by the associated laxative shroud transport means 60 reversed at rated speed.
  • the following second consignment 31 still retracts at nominal speed into the conveying path 51 of the other side and is braked starting at the illustrated point in time at which the trailing edge just leaves the assigned shroud transport path 41.
  • FIG. 2a the first consignment 30 of the incoming consignment stream has left the upper or in the feed direction the right conveying path 50 and is reversed by the associated laxative shroud transport means 60 reversed at rated speed.
  • the following second consignment 31 still retracts at nominal speed into the conveying path 51 of the other side and is braked starting at the illustrated point in time at which the trailing edge just leaves the assigned shroud transport path 41.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Sorting Of Articles (AREA)
  • Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
  • Structure Of Belt Conveyors (AREA)

Abstract

The device comprises two cover band conveyor runs (50,51) with reversible transport direction, driven by a common drive roller (18). The letters (30,31,32) in the flow of letters are distributed alternately on the cover band conveyor runs (50,51). The back-transported letters (30,31,32) are led into removing cover band transport means (60,61). The drive roller (18) is controlled such that on introduction of a following letter (32) into a cover band conveyor run (50,51) the preceding back-transported letter (31) has already accelerated to the nominal speed, the braking process only being initiated when the rear edge of the relevant letter (32) has left the introducing cover band transport run (40,41) and the preceding letter (31) is no longer held in one of the controlled and reversible cover band conveyor runs (50,51).

Description

Die Erfindung betrifft eine Vorrichtung zur Richtungsumkehr von flachen Sendungen in Sendungssortieranlagen mit zuführenden und abführenden Deckbandfördermitteln.
In Sendungssortieranlagen, in denen flache Sendungen u.a. Lese- und Druckeinrichtungen zugeführt werden, um die Sendungen entsprechend auf ihrer Oberfläche aufgebrachter Verteilinformationen zu sortieren, müssen sich diese Verteilinformationen an festgelegten Positionen befinden. Ist dies nicht der Fall, so müssen die Sendungen durch Drehung um ihre Längs- und/oder Hochachse in die Arbeitsposition gebracht werden.
The invention relates to a device for reversing the direction of flat shipments in consignment sorting systems with feeding and discharging cover belt conveyors.
In consignment sorting plants, where flat items of information are supplied to reading and printing devices in order to sort the items corresponding to distribution information applied to their surface, this distribution information must be in fixed positions. If this is not the case, the consignments must be brought by rotation about their longitudinal and / or vertical axis in the working position.

Dazu wurde eine Vorrichtung zur Richtungsumkehr (die Vorderkante wird zur Hinterkante nach der Wiedereinschleusung in den Sendungsstrom) bekannt( DE 43 45 160 C2 ). Eine kollisionsfreie Umkehrung zweier aufeinander folgender Sendungen setzt dabei aber voraus, dass die erste umzukehrende Sendung bereits die Vorrichtung verlassen hat, bevor die zweite in sie eintritt. Dies würde bei den üblichen hohen Fördergeschwindigkeiten zu unzulässig großen Minimallücken zwischen aufeinander folgenden Sendungen führen. Durch die Verwendung zweier Umkehreinrichtungen ist es jedoch möglich, auch aufeinander folgende Sendungen mit kleinen Lücken umzukehren. Dabei werden die Sendungen abwechselnd in eine der beiden Umkehrvorrichtungen geleitet. Dort wird jede umzukehrende Sendung gestoppt und fährt rückwärts aus der Vorrichtung wieder heraus.For this purpose, a device for direction reversal (the leading edge becomes the trailing edge after re-injection into the broadcast stream) has become known ( DE 43 45 160 C2 ). However, a collision-free reversal of two consecutive transmissions presupposes that the first program to be reversed has already left the device before the second one enters it. This would lead to impermissibly large minimum gaps between successive programs at the usual high conveyor speeds. By using two reversals, however, it is possible to reverse even consecutive broadcasts with small gaps. The programs are alternately directed into one of the two reversing devices. There, each program to be reversed is stopped and moves backwards out of the device.

Entsprechende baulich kompakte Vorrichtungen zur Richtungsumkehr von flachen Sendungen mit zwei Umkehrvorrichtungen sind aus US 6 550 621 B1 bekannt.Corresponding structurally compact devices for reversing the direction of flat shipments with two reversing devices are out US Pat. No. 6,550,621 B1 known.

Weiterhin wird in JP-A-61-64658 eine Vorrichtung zur Richtungsumkehr von flachen Gegenständen mittels Rollen beschrieben. Dabei werden die hintereinander zugeführten Gegenstände über eine Weiche abwechselnd in zwei reversierbar angetriebene Förderstrecken geleitet. Während ein Gegenstand in die eine Förderstrecke transportiert wird, wird gleichzeitig der jeweils voraus laufende Gegenstand aus der anderen Förderstrecke wieder heraus befördert.Furthermore, in JP-A-61-64658 a device for reversing the direction of flat objects by means of rollers described. Here are the successively supplied items alternately passed over a switch in two reversibly driven conveyor lines. While an object is being transported in the one conveyor line, the respective preceding object is simultaneously conveyed out of the other conveyor line again.

Der Erfindung liegt die Aufgabe zugrunde, eine aufwandsarme Vorrichtung zur Richtungsumkehr von flachen Sendungen in Sendungssortieranlagen mit zu- und abführenden Deckbandfördermitteln zu schaffen, mit der eine kollisionsfreie Drehung von flachen, mit kleinen Abständen aufeinander folgenden Sendungen um ihre Hochachse möglich ist.The invention has for its object to provide a low-cost device for reversing the direction of flat shipments in consignment sorting with incoming and outgoing shroud conveyors, with a collision-free rotation of flat, with small intervals successive programs is possible about its vertical axis.

Erfindungsgemäß wird die Aufgabe durch die Merkmale des Anspruches 1 gelöst.
Dem zuführenden Deckbandfördermittel, bestehend aus zwei endlosen, umlaufenden Bändern, zwischen denen die Sendungen eingeklemmt hintereinander transportierbar sind, folgt eine Weiche zur Aufteilung der Sendungen im Wechsel auf zwei im spitzen Winkel auseinander laufende Deckbandtransportstrecken mit jeweils zwei endlosen Bändern, denen sich jeweils eine gesteuert und reversierbar antreibbare Förderstrecke, in der die Sendungen ebenfalls geklemmt transportierbar sind, anschließt. Beide Förderstrecken sind durch eine zwischen ihnen angeordnete Antriebsrolle antreibbar und die Sendungen sind in einem solchen Umschlingungswinkel um die Antriebsrolle führbar, dass die Sendungen unter Berücksichtigung der Reibkräfte annähernd rutschfrei abbremsbar und beschleunigbar sind. Jede Förderstrecke ist so ausgeführt, dass die Sendungen beim Rücktransport unter einem spitzen Winkel zur jeweiligen zuführenden Deckbandtransportstrecke in ein abführendes Deckbandtransportmittel mit zwei endlosen, umlaufenden Bändern leitbar sind. Der Abbremsvorgang wird erst gestartet, wenn die Hinterkante der jeweiligen Sendung die Deckbandtransportstrecke verlassen hat. Zu jedem Zeitpunkt sind die Sendungen in der Vorrichtung kraftschlüssig geführt.
According to the invention the object is achieved by the features of claim 1.
The feeding shroud conveyor, consisting of two endless circulating belts, between which the shipments are trapped in a row, follows a switch for splitting the programs alternately on two apart at an acute angle Deckbandtransportstrecken with two endless belts, which each one controlled and reversible drivable conveyor line, in which the items are also transported clamped, connects. Both conveyor sections can be driven by a drive roller arranged between them and the items can be guided around the drive roller in such a wrap angle that the items can be braked and accelerated approximately slip-free, taking into account the frictional forces. Each conveyor line is designed so that the items can be routed during return transport at an acute angle to the respective feeding shroud transport path in a laxative shroud transport means with two endless, circulating belts. The braking process is only started when the trailing edge of the respective program has left the shroud transport path. At any time, the broadcasts are frictionally guided in the device.

Somit ist es möglich, Sendungsströme mit kleinen Lücken zwischen den Sendungen mit nur einer Vorrichtung zur Richtungsumkehr zu verarbeiten.Thus, it is possible to process broadcast streams with small gaps between broadcasts with only one direction reversal device.

Vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen dargelegt.
Um die Sendungen wieder in den Sendungsstrom einzuschleusen, sind die beiden die Sendungen beim Rücktransport abführenden Deckbandtransportmittel vorteilhaft an eine Zusammenführung mit einem Ausgang führbar.
Advantageous embodiments of the invention are set forth in the subclaims.
In order to feed the mailings back into the mail stream, the two mailings which transport the mailings during the return transport can advantageously be guided to a merger with an exit.

Damit gewährleistet ist, dass auch Sendungen ohne Umkehrung die Vorrichtung ohne Behinderung durchlaufen können, ist es vorteilhaft, die Enden der gesteuert und reversierbar antreibbaren Förderstrecken soweit voneinander entfernt anzuordnen, dass ohne Richtungsumkehr weiterzutransportierende Sendungen ohne Behinderung zu einem sich anschließenden dritten abführenden Deckbandtransportmittel transportierbar sind.To ensure that even transmissions without reversal can pass through the device without hindrance, it is advantageous to arrange the ends of the controlled and reversibly drivable conveyor lines far away from each other that weiterzutransportierende broadcasts can be transported without obstruction to a subsequent third laxative shroud transport without direction reversal.

Zur aufwandsarmen Ausführung der gesteuert und reversierbar antreibbaren Förderstrecken ist es vorteilhaft, wenn diese jeweils aus einem äußeren, endlosen Deckband, das über zwei Umlenkrollen geführt ist, und einem gemeinsamen inneren Deckband, das über die Antriebsrolle und eine weitere Umlenkrolle geführt ist, bestehen.For low-cost execution of the controlled and reversibly driven conveyor lines, it is advantageous if they each consist of an outer, endless shroud, which is guided over two pulleys, and a common inner shroud, which is guided over the drive roller and a further deflection roller.

Eine weitere Möglichkeit zur aufwandsarmen Ausführung der gesteuert und reversierbar antreibbaren Förderstrecken, aber bei eingeschränktem Sendungsformatspektrum, besteht darin, für diese jeweils ein äußeres, endloses Deckband, das über zwei Umlenkrollen geführt ist, und die gemeinsame Antriebsrolle vorzusehen.A further possibility for the low-effort execution of the controlled and reversibly drivable conveyor lines, but with limited range of broadcast formats, is to provide for these in each case an outer, endless shroud, which is guided over two pulleys, and the common drive roller.

Um diese Einschränkungen im Sendungsformatspektrum zu beseitigen, ist es vorteilhaft, zum Klemmen der Sendungen in beiden Förderstrecken noch eine nicht angetriebene Andruckrolle vorzusehen.To eliminate these limitations in the broadcast format spectrum, it is advantageous to provide a non-driven pressure roller for clamping the programs in both conveyor lines.

Vorteilhaft ist es auch, jeweils als äußeres endloses Band jeder der Weiche folgenden Deckbandtransportstrecke und als inneres endloses Band des zugeordneten, beim Rücktransport abführenden Deckbandtransportmittels nur ein angetriebenes, durch Rollen geführtes umlaufendes Endlosband vorzusehen. Dadurch kann ein angetriebenes, endloses, umlaufendes Band eingespart werden.It is also advantageous, in each case as an outer endless band of each of the points following shroud transport path and provide as an inner endless belt of the associated, the return transport dissipating shroud transport means only a driven, guided by rolling revolving endless belt. As a result, a driven, endless, circulating belt can be saved.

Weiterhin ist es vorteilhaft, als Detektionsmittel für die Sendungshinterkanten eine Lichtschranke einzusetzen.Furthermore, it is advantageous to use a light barrier as the detection means for the mailing trailing edges.

Anschließend wird die Erfindung in einem Ausführungsbeispiel anhand der Zeichnung erläutert.
Dabei zeigen

FIG 1
eine schematische Draufsicht auf die Vorrich- tung zur Richtungsumkehr,
FIG 2a-d
sehr schematische Draufsichten auf die Vor- richtung zur Richtungsumkehr zu verschiede- nen, aufeinander folgenden Zeitpunkten.
Subsequently, the invention will be explained in an embodiment with reference to the drawing.
Show
FIG. 1
a schematic plan view of the device for direction reversal,
FIG. 2a-d
very schematic plan views of the device for reversing direction at different, successive times.

Die flachen Sendungen 30,31,32 werden über ein hier nicht im einzelnen dargestelltes Deckbandfördermittel 1 und eine steuerbare Weiche 2 abwechselnd auf zwei im spitzen Winkel auseinander laufende zuführende Deckbandtransportstrecken geleitet. Die rechte Deckbandtransportstrecke besteht aus einem ersten endlosen Band 3, das über eine erste Umlenkrolle 4 umgelenkt und zurückgeführt wird, und einem zweiten endlosen Band 5, das über eine zweite Umlenkrolle 6 umgelenkt und zurückgeführt wird. Dementsprechend analog besteht auch die linke Deckbandtransportstrecke aus einem dritten endlosen Band 9, das über eine dritte Umlenkrolle 10 umgelenkt und zurückgeführt wird, und einem vierten endlosen Band 11, das über eine vierte Umlenkrolle 12 umgelenkt und zurückgeführt wird.
Jede Deckbandtransportstrecke leitet die Sendungen in eine gesteuert und reversierbar angetriebene Förderstrecke. Beide Förderstrecken laufen in Einlaufrichtung unter einem spitzen Winkel zusammen. Die der rechten Deckbandtransportstrecke folgende Förderstrecke besteht aus einem fünften, äußeren endlosen Band 15, das über zwei Umlenkrollen 16 umgelenkt wird und einem sechsten, inneren endlosen Band 17, das über eine größere Antriebsrolle 18 und eine kleinere Umlenkrolle 19 läuft. Dieses endlose Band 17 ist gleichzeitig auf der gegenüberliegenden Seite das innere endlose Band der der linken Deckbandtransportstrecke folgenden Förderstrecke, die noch ein siebtes, äußeres endloses Band 20, welches über zwei Umlenkrollen 21 umgelenkt wird, aufweist.
Die nahe beieinander befindlichen Umlenkrollen 16,21 der Förderstrecken weisen einen solchen Abstand voneinander auf, dass die dicksten Sendungen 30,31,32, die nicht zurücktransportiert werden müssen oder die länger als die reversierbare Förderstrecke sind, durch den Spalt zwischen den Umlenkrollen 16,21 ungehindert einem folgenden Transportmittel zugeführt werden können. Da die Transportrichtungen der Deckbandtransportstrecken und der jeweils nachfolgenden Förderstrecken zueinander geneigt sind, ergibt sich ein notwendiger Umschlingungswinkel, mit dem die Sendungen 30,31,32 um die Antriebstrommel 18 geführt werden.
Da die Förderstrecken nach innen geneigt sind, werden die Sendungen 30,31,32 beim Rücktransport außen an den zuführenden Deckbandtransportstrecken und dem zuführenden Deckbandfördermittel 1 vorbei beidseitig in abführende Deckbandtransportmittel geleitet. Diese bestehen jeweils aus äußeren, über Umlenktrommeln 8,14 umgelenkten endlosen Bändern 7,13 und inneren Bändern 3,9, welche gleichzeitig die äußeren Bänder der zuführenden Deckbandtransportstrecken sind.
Dadurch, dass die Sendungen 30,31,32 im Wechsel auf die zuführenden Deckbandtransportstrecken aufgeteilt werden und somit im Wechsel auf den gegenüberliegenden Seiten der Antriebstrommel 18 in die reversierbaren Förderstrecken geführt werden, ist es nicht mehr notwendig wie bisher, die vorhergehende Sendung 31 aus der Umkehrförderstrecke herauszufahren, bevor die nachfolgende Sendung 32 in diese hineinfährt. Es ist nur notwendig, dass die Antriebstrommel 18 ihre Nenngeschwindigkeit erreicht hat, wenn die nachfolgende Sendung 32 in die Umkehrförderstrecke eben mit dieser Nenngeschwindigkeit einfährt und dass der Abbremsvorgang erst begonnen wird, sobald die Hinterkante der in die reversierbare Förderstrecke einfahrenden Sendung 32 die zuführende Deckbandtransportstrecke und die vorherige Sendung 31 die reversierbare Förderstrecke verlassen hat. Damit ist es möglich, trotz der Bremsund Beschleunigungsvorgänge mit nur einer Antriebstrommel 18 kleine Lücken zwischen den reversierten Sendungen 30,31,32 zu realisieren. Wann die Vorder- und Hinterkanten der Sendungen 30,31,32 die beschriebenen Positionen erreicht haben, wird mittels Lichtschranken Li1 bis Li3 und des Streckentaktes ermittelt.
The flat programs 30, 31, 32 are alternately directed by way of a cover belt conveying means 1, not shown in detail here, and a controllable switch 2 to two feeding conveyor belt conveyor sections which run apart at an acute angle. The right-hand cover belt transport path consists of a first endless belt 3, which is deflected and returned via a first deflection roller 4, and a second endless belt 5, which is deflected and returned via a second deflection roller 6. Analogously, the left shroud transport path also consists of a third endless belt 9, which is deflected and returned via a third deflection roller 10, and a fourth endless belt 11, which is deflected and returned via a fourth deflection roller 12.
Each shroud conveyor route directs the shipments into a controlled and reversibly driven conveyor line. Both conveyor lines converge in the inlet direction at an acute angle. The conveyor belt section following the right conveyor belt conveyor consists of a fifth, outer endless belt 15, which is deflected by two deflection rollers 16 and a sixth, inner endless belt 17, which runs over a larger drive roller 18 and a smaller guide roller 19. This endless belt 17 is at the same time on the opposite side, the inner endless belt of the left cover belt transport path following conveyor line, which still has a seventh, outer endless belt 20, which is deflected over two pulleys 21 has.
The deflection rollers 16, 21 of the conveyor lines located close to each other are at such a distance from one another that the thickest packages 30, 31, 32 that do not need to be transported back or that are longer than the reversible conveyor line, pass through the gap between the deflection rollers 16, 21 can be fed freely to a following means of transport. Since the transport directions of the shroud transport paths and the respective subsequent conveyor lines are inclined to each other, there is a necessary angle of wrap, with which the programs 30,31,32 are guided around the drive drum 18.
Since the conveyor lines are inclined inwards, the consignments 30,31,32 are passed on the outside back to the feeding Deckbandtransportstrecken and the feeding Deckbandfördermittel 1 on both sides in laxative Deckbandtransportmittel. These consist respectively of outer, deflected over idlers 8,14 endless belts 7,13 and inner bands 3,9, which are simultaneously the outer bands of the feeding Deckbandtransportstrecken.
The fact that the programs are 30,31,32 alternately divided on the feeding shroud transport paths and thus performed alternately on the opposite sides of the drive drum 18 in the reversible conveyor lines, it is no longer necessary as before, the previous program 31 from the Invert reverse conveyor line before the subsequent shipment 32 drives into this. It is only necessary that the drive drum 18 has reached its rated speed when the subsequent shipment 32 enters the reverse conveyor line just at this rated speed and that the deceleration process is only started when the trailing edge of the incoming into the reversible conveyor line shipment 32, the feeding shroud transport path and the previous shipment 31 the reversible conveyor line has left. This makes it possible, despite the braking and acceleration processes with only one drive drum 18 to realize small gaps between the reversed programs 30,31,32. When the leading and trailing edges of the programs 30,31,32 have reached the described positions, is determined by means of light barriers Li1 to Li3 and the line clock.

Der zeitliche Ablauf wird anhand der Figuren 2a-d veranschaulicht.
In FIG 2a hat die erste Sendung 30 des einfahrenden Sendungsstromes die obere oder in Zuführrichtung rechte Förderstrecke 50 verlassen und wird durch das zugehörende abführende Deckbandtransportmittel 60 in Nenngeschwindigkeit reversiert transportiert. Gleichzeitig fährt die nachfolgende zweite Sendung 31 noch mit Nenngeschwindigkeit in die Förderstrecke 51 der anderen Seite ein und wird zu dem dargestellten Zeitpunkt, zu dem die Hinterkante die zugeordnete Deckbandtransportstrecke 41 gerade verlässt, beginnend abgebremst.
In FIG 2b ist die zweite Sendung 31 zum Stillstand gekommen, ihre Hinterkante ist auf Grund der Eigensteifigkeit der Sendung 31 wie dargestellt in Richtung des zugehörigen abführenden Deckbandtransportmittels 61 geschwenkt und die Antriebstrommel 18 wird reversiert gestartet, so dass die zweite Sendung 31 in das Deckbandtransportmittel 61 transportiert wird. Gleichzeitig wird die dritte Sendung 32 im Wechsel in der in Transportrichtung rechten zuführenden Deckbandtransportstrecke 40 mit Nenngeschwindigkeit transportiert.
In FIG 2c ist ein nachfolgender Zeitpunkt dargestellt, zu dem die Antriebsrolle 18 auf Nenndrehzahl beschleunigt wurde und somit die zweite Sendung 31 mit Nenngeschwindigkeit in das mit dieser Geschwindigkeit laufende, abführende Deckbandtransportmittel 61 einlaufen kann. Inzwischen ist die dritte Sendung 32 am Ende der zuführenden Deckbandtransportstrecke 40 angekommen und kann von der mit dieser Geschwindigkeit laufenden nachfolgenden Förderstrecke 50 übernommen werden.
The timing is based on the FIGS. 2a-d illustrated.
In FIG. 2a the first consignment 30 of the incoming consignment stream has left the upper or in the feed direction the right conveying path 50 and is reversed by the associated laxative shroud transport means 60 reversed at rated speed. At the same time, the following second consignment 31 still retracts at nominal speed into the conveying path 51 of the other side and is braked starting at the illustrated point in time at which the trailing edge just leaves the assigned shroud transport path 41.
In FIG. 2b If the second consignment 31 has come to a standstill, its trailing edge is pivoted as shown in the direction of the associated discharging shroud transport means 61 due to the inherent rigidity of the consignment 61 and the drive drum 18 is reversely started, so that the second consignment 31 is transported into the shroud transport means 61. At the same time, the third program 32 is transported alternately in the conveying direction in the right feeding shroud transport path 40 at nominal speed.
In 2c is shown a subsequent time at which the drive roller 18 has been accelerated to nominal speed and thus the second shipment 31 can run at rated speed in the running at this speed, laxative shroud transport means 61. In the meantime, the third consignment 32 has arrived at the end of the feeding shroud transport path 40 and can be taken over by the subsequent conveying path 50 running at this speed.

Zu dem in FIG 2d dargestellten Zeitpunkt hat die zweite Sendung 31 inzwischen die Förderstrecke 51 verlassen und die dritte Sendung 32 hat gerade die letzte Klemmstelle der Deckbandtransportstrecke 40 verlassen, so dass der Bremsvorgang für die Förderstrecke 50 durch die Arbeitstrommel 18 begonnen werden kann. Inzwischen ist die vierte Sendung 33 des Sendungsstromes an der Weiche angelangt und der weitere Ablauf erfolgt wie zu den FIG 2a-c beschrieben, nur auf der jeweils anderen Seite der Antriebstrommel 18.To the in 2d In the meantime, the second program 31 has now left the conveyor line 51 and the third program 32 has just left the last nip point of the shroud transport path 40, so that the braking process for the conveyor line 50 can be started by the working drum 18. In the meantime, the fourth transmission 33 of the transmission current has arrived at the switch and the further procedure takes place as for the switch FIGS. 2a-c described, only on the other side of the drive drum 18th

Claims (9)

  1. Apparatus for reversing the direction of flat postal items in postal item sorting systems, with a supplying clamping belt conveyor (1), consisting of two endless circulating belts, between which the postal items (30, 31, 32) can be transported in a clamped manner one behind the other, points (2) for distributing the postal items (30, 31, 32) in an alternating manner onto two clamping belt transport runs (40, 41) moving at an acute angle away from one another, each with two endless belts (3, 5; 9, 11), to each of which a conveyor run (50, 51) that can be driven in a controlled and reversible manner and in which the postal items (30, 31, 32) can be transported in a similarly clamped manner, is connected, both conveyor runs (50, 51) being such that they can be driven by a drive roller (18) disposed between them and it being possible for the postal items (30, 31, 32) to be conveyed at such a contact angle around the drive roller (18) that the postal items (30, 31, 32) can be slowed down and accelerated largely without slipping taking into account friction forces, each conveyor run (50, 51) being embodied in such a manner that during return transportation the postal items (30, 31, 32) can be routed at an acute angle to the respective supplying clamping belt transport run (40, 41) into a collecting clamping transporter (60, 61) with two endless belts (3, 7: 9, 13), the drive controller of the drive roller (18) being embodied in such a manner that when a subsequent postal item (32) enters one of the conveyor runs (50, 51), the preceding postal item (31) being transported back on the other conveyor run (50, 51) is already accelerated to nominal speed, the slowing operation is only started when the rear edge of the respective postal item (32) has left the clamping belt transport run (40, 41) and the preceding postal item (31) is no longer clamped in the other conveyor run (50, 51), the postal items (30, 31, 32) being conveyed in the apparatus by friction at all times.
  2. Apparatus according to claim 1, wherein the two clamping belt transporters (60, 61) collecting the postal items (30, 31, 32) during return transportation can be guided to a junction with one output.
  3. Apparatus according to claim 1, wherein the ends of the conveyor runs (50, 51) that can be driven in a controlled and reversible manner are disposed far enough away from one another that postal items to be transported further without reversing direction can be transported without hindrance to an adjoining third collecting clamping transporter.
  4. Apparatus according to claim 1, wherein the two conveyor runs (50, 51) that can be driven in a controlled and reversible manner consist respectively of an outer, endless clamping belt (15, 20), which is guided by way of two deflection rollers (16, 21), and a common inner clamping belt (17), which is guided by way of the drive roller (18) and a further deflection roller (19).
  5. Apparatus according to claim 1, wherein the two conveyor runs (50, 51) that can be driven in a controlled and reversible manner consist respectively of an outer, endless clamping belt (15, 20), which is guided by way of two deflection rollers (16, 21), and the common drive roller (18).
  6. Apparatus according to claim 5, wherein a further nondriven pressure roller (19) is provided to clamp the postal items (30, 31, 32) in both conveyor runs (50, 51).
  7. Apparatus according to claim 1, wherein only one driven endless belt (3, 9) guided by way of rollers (4, 10) is provided as the outer endless belt of each of the clamping belt transport runs (40, 41) following the points (2) and as the inner endless belt of the associated clamping belt transporter (60, 61) that collects during return transportation respectively.
  8. Apparatus according to claim 1, wherein the clamping distances defined by the points of contact of the rollers (4, 10, 18, 19) with the belts (5, 7, 11, 13, 15, 20) are smaller than the shortest postal item.
  9. Apparatus according to claim 1, wherein light barriers (Li1, Li2, Li3) are provided as detection means for the edges of the postal items.
EP05732326A 2004-05-29 2005-04-20 Device for reversal of direction of planar letters Not-in-force EP1753681B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004026362A DE102004026362B3 (en) 2004-05-29 2004-05-29 Direction reversal device for flat shipments
PCT/EP2005/004216 WO2005115892A1 (en) 2004-05-29 2005-04-20 Device for reversal of direction of planar letters

Publications (2)

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EP1753681A1 EP1753681A1 (en) 2007-02-21
EP1753681B1 true EP1753681B1 (en) 2009-08-19

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EP05732326A Not-in-force EP1753681B1 (en) 2004-05-29 2005-04-20 Device for reversal of direction of planar letters

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US (1) US7306219B2 (en)
EP (1) EP1753681B1 (en)
JP (1) JP2007531677A (en)
CN (1) CN100542917C (en)
DE (2) DE102004026362B3 (en)
WO (1) WO2005115892A1 (en)

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Publication number Publication date
DE502005007947D1 (en) 2009-10-01
US7306219B2 (en) 2007-12-11
CN1960924A (en) 2007-05-09
EP1753681A1 (en) 2007-02-21
WO2005115892A1 (en) 2005-12-08
DE102004026362B3 (en) 2005-11-03
US20070215438A1 (en) 2007-09-20
CN100542917C (en) 2009-09-23
JP2007531677A (en) 2007-11-08

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