EP1753681A1 - Device for reversal of direction of planar letters - Google Patents

Device for reversal of direction of planar letters

Info

Publication number
EP1753681A1
EP1753681A1 EP05732326A EP05732326A EP1753681A1 EP 1753681 A1 EP1753681 A1 EP 1753681A1 EP 05732326 A EP05732326 A EP 05732326A EP 05732326 A EP05732326 A EP 05732326A EP 1753681 A1 EP1753681 A1 EP 1753681A1
Authority
EP
European Patent Office
Prior art keywords
shroud
conveyor
transport
endless
guided
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP05732326A
Other languages
German (de)
French (fr)
Other versions
EP1753681B1 (en
Inventor
Göran KEIL
Armin Zimmermann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of EP1753681A1 publication Critical patent/EP1753681A1/en
Application granted granted Critical
Publication of EP1753681B1 publication Critical patent/EP1753681B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/58—Article switches or diverters
    • B65H29/60—Article switches or diverters diverting the stream into alternative paths
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H15/00—Overturning articles
    • B65H15/008—Overturning articles employing 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
    • B65H2301/30—Orientation, displacement, position of the handled material
    • B65H2301/33—Modifying, selecting, changing orientation
    • B65H2301/333—Inverting
    • B65H2301/3331—Involving forward reverse transporting means
    • B65H2301/33314—Involving forward reverse transporting means forward reverse 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
    • 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
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S271/00—Sheet feeding or delivering
    • Y10S271/902—Reverse direction of sheet movement

Definitions

  • the invention relates to a device for reversing the direction of flat consignments in consignment sorting systems with feeding and discharging shroud conveyors.
  • this distribution information In consignment sorting systems in which flat consignments etc. Reading and printing devices are supplied in order to sort the mail items according to the distribution information applied to their surface, this distribution information must be located at defined positions. If this is not the case, the mail items must be brought into the working position by rotating them about their longitudinal and / or vertical axis.
  • the invention has for its object a low effort
  • the feeding shroud conveyor consisting of two endless, revolving belts, between which the consignments are clamped and transported one after the other, is followed by a consecration for dividing the consignments in alternation on two shroud transport routes that run apart at an acute angle, each with two endless belts, which are separated each connected to a controlled and reversibly driven conveyor line, in which the mail items are also transported clamped.
  • Both conveyor lines are driven by a drive roller arranged between them and the mail items are guided around the drive roller in such a wrap angle that the mail items are braked and accelerated almost without slipping, taking into account the frictional forces.
  • Each conveyor line is designed in such a way that, when it is returned, it directs the mail items at an acute angle to the respective feeding cover band transport line into a discharging cover band transport means with two endless, revolving belts.
  • the braking process is only started when the rear edge of the respective consignment has left the shroud transport line. At all times, the shipments are non-positively guided in the device. It is thus possible to process mail streams with small gaps between the mail items with only one device for reversing the direction.
  • the two shroud transport means that remove the mail items during the return transport are advantageously guided to a junction with an exit.
  • Another option for the low-cost execution of the controlled and reversibly driven conveyor lines, but with a limited range of mailing formats, is to provide an outer, endless shroud for each of these, which is guided over two deflection rollers, and the common drive roller.
  • 2a-d are very schematic plan views of the device for reversing the direction at different, successive times.
  • the flat mail items 30, 31, 32 are routed alternately via a shroud conveyor 1 (not shown in detail here) and a controllable switch 2 to two shroud transport routes which run apart at an acute angle.
  • the right cover band 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 cover band transport section also consists of a third endless belt 9, which is deflected and returned via a third deflecting roller 10, and a fourth endless belt 11, which is deflected and returned via a fourth deflecting roller 12.
  • Each shroud conveyor line routes the consignments to a controlled and reversibly driven conveyor line.
  • the conveyor line following the right shroud conveyor line consists of a fifth, outer endless belt 15, which is deflected via two deflection rollers 16 and a sixth, inner endless belt 17, which runs over a larger drive roller 18 and a smaller deflection roller 19.
  • This endless belt 17 is on the same time on the opposite side, the inner endless belt of the conveyor track following the left cover belt transport section, which still has a seventh, outer endless belt 20 which is deflected via two deflecting rollers 21.
  • the deflection rollers 16, 21 of the conveyor lines which are located close to one another, are spaced apart from one another such that the thickest mail items 30, 31, 32, which do not have to be transported back or which are longer than the reversible conveyor line, pass through the gap between the deflection rollers. len 16.21 can be fed unhindered to a subsequent means of transport. Since the directions of transport of the shroud conveyor lines and the subsequent conveyor lines are inclined to one another, there is a necessary wrap angle with which the mail items 30, 31, 32 are guided around the drive drum 18.
  • the previous one is no longer necessary as before To move mail item 31 out of the reverse conveyor line before the subsequent mail item 32 enters it. It is only necessary that the drive drum 18 has reached its nominal speed when the subsequent consignment 32 enters the reversing conveyor section at this nominal speed and that the braking process is only started as soon as the rear edge of the consignment 32 entering the reversible conveyor section the feeding cover band transport section and the previous broadcast 31 the reversible conveyor has left the route. This makes it possible to implement 18 small gaps between the reversed items 30, 31, 32 despite the braking and acceleration processes using only one drive drum. When the front and rear edges of the items 30, 31, 32 have reached the positions described is determined by means of light barriers Lil to Li3 and the route clock.
  • the first mail item 30 of the incoming mail flow has left the upper or right conveying line 50 in the feed direction and is transported reversed at the nominal speed by the associated removing cover band transport means 60.
  • the following second consignment 31 is still traveling at nominal speed into the conveyor section 51 on the other side and is braked starting at the time shown, at which the trailing edge is just leaving the assigned cover band transport section 41.
  • the second consignment 31 has come to a standstill, because of the inherent rigidity of the consignment 31, its rear edge has been pivoted in the direction of the associated discharging shroud transport means 61, as shown, and the drive drum 18 is started reversed, so that the second consignment 31 enters the Shroud conveyor 61 is transported.
  • the third consignment 32 is transported alternately in the shroud transport line 40 which feeds to the right in the transport direction at nominal speed.
  • FIG. 2c shows a subsequent point in time at which the drive roller 18 was accelerated to the nominal speed and the second consignment 31 can therefore run into the discharging shroud transport means 61 running at this speed at nominal speed.
  • the third consignment 32 has arrived at the end of the supply belt conveyor section 40 to be fed and can be taken over by the subsequent conveyor section 50 running at this speed.
  • the second consignment 31 has meanwhile left the conveyor section 51 and the third consignment 32 has just left the last clamping point of the shroud conveyor section 40, so that the braking process for the conveyor section 50 can be started by the working drum 18.
  • the fourth consignment 33 of the consignment stream has arrived at the switch and the further procedure is as described for FIGS. 2a-c, only on the other side of the drive drum 18.

Landscapes

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

Beschreibungdescription

Vorrichtung zur Richtungsumkehr von flachen SendungenDevice for reversing the direction of flat mail items

Die Erfindung betrifft eine Vorrichtung zur Richtungsumkehr von flachen Sendungen in Sendungssortieranlagen mit zuführenden und abführenden Deckbandfördermitteln.The invention relates to a device for reversing the direction of flat consignments in consignment sorting systems with feeding and discharging shroud conveyors.

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.In consignment sorting systems in which flat consignments etc. Reading and printing devices are supplied in order to sort the mail items according to the distribution information applied to their surface, this distribution information must be located at defined positions. If this is not the case, the mail items must be brought into the working position by rotating them about their longitudinal and / or vertical axis.

Dazu wurde eine Vorrichtung zur Richtungsumkehr (die Vorderkante wird zur Hinterkante nach der Wiedereinschleusung in den Sendungsström) 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 reversing the direction (the leading edge becomes the trailing edge after reinsertion into the mail flow) has become known (DE 43 45 160 C2). However, a collision-free reversal of two successive mail items presupposes that the first mail item to be reversed has already left the device before the second one enters it. At the usual high conveyor speeds, this would lead to impermissibly large minimum gaps between consecutive consignments. However, by using two reversing devices, it is possible to reverse consecutive consignments with small gaps. The consignments are alternately fed into one of the two reversing devices. Every consignment to be reversed is stopped there 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 Bl bekannt.Corresponding structurally compact devices for reversing the direction of flat mail items with two reversing devices are known from US Pat. No. 6,550,621 B1.

Der Erfindung liegt die Aufgabe zugrunde, eine aufwandsarmeThe invention has for its object a low effort

Vorrichtung zur Richtungsumkehr von flachen Sendungen in Sendungssortieranlagen mit zu- und abführenden Deckbandförder- mittein zu schaffen, mit der eine kollisionsfreie Drehung von flachen, mit kleinen Abständen aufeinander folgenden Sendungen um ihre Hochachse möglich ist.Device for reversing the direction of flat mail in mail sorting systems with infeed and outfeed shroud conveyor mittein, with which a collision-free rotation of flat, consecutively spaced consignments around their vertical axis is possible.

Erfindungsgemäß wird die Aufgabe durch die Merkmale des Anspruches 1 gelöst .According to the invention the object is achieved by the features of claim 1.

Dem zuführenden Deckbandfördermittel, bestehend aus zwei end- losen, umlaufenden Bändern, zwischen denen die Sendungen eingeklemmt hintereinander transportiert werden, folgt eine Wei- ehe 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 angetriebene Förderstrecke, in der die Sendungen ebenfalls geklemmt transportiert werden, an- schließt. Beide Förderstrecken sind durch eine zwischen ihnen angeordnete Antriebsrolle angetrieben und die Sendungen sind in einem solchen Umschlingungswinkel um die Antriebsrolle geführt, dass die Sendungen unter Berücksichtigung der Reibkräfte annähernd rutschfrei abgebremst und beschleunigt wer- den. Jede Förderstrecke ist so ausgeführt, dass sie die Sendungen beim Rücktransport unter einem spitzen Winkel zur jeweiligen zuführenden Deckbandtransportstrecke in ein abführendes Deckbandtransportmittel mit zwei endlosen, umlaufenden Bändern leitet. 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. Somit ist es möglich, Sendungsströme mit kleinen Lücken zwischen den Sendungen mit nur einer Vorrichtung zur Richtungs- umkehr zu verarbeiten.The feeding shroud conveyor, consisting of two endless, revolving belts, between which the consignments are clamped and transported one after the other, is followed by a consecration for dividing the consignments in alternation on two shroud transport routes that run apart at an acute angle, each with two endless belts, which are separated each connected to a controlled and reversibly driven conveyor line, in which the mail items are also transported clamped. Both conveyor lines are driven by a drive roller arranged between them and the mail items are guided around the drive roller in such a wrap angle that the mail items are braked and accelerated almost without slipping, taking into account the frictional forces. Each conveyor line is designed in such a way that, when it is returned, it directs the mail items at an acute angle to the respective feeding cover band transport line into a discharging cover band transport means with two endless, revolving belts. The braking process is only started when the rear edge of the respective consignment has left the shroud transport line. At all times, the shipments are non-positively guided in the device. It is thus possible to process mail streams with small gaps between the mail items with only one device for reversing the direction.

Vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen dargelegt .Advantageous embodiments of the invention are set out in the subclaims.

Um die Sendungen wieder in den Sendungsstrom einzuschleusen, sind die beiden die Sendungen beim Rücktransport abführenden Deckbandtransportmittel vorteilhaft an eine Zusammenführung mit einem Ausgang geführt . Damit gewährleistet ist, dass auch Sendungen ohne Umkehrung die Vorrichtung ohne Behinderung durchlaufen können, ist es vorteilhaft, die Enden der gesteuert und reversierbar ange- triebenen Förderstrecken soweit voneinander entfernt anzuordnen, dass ohne Richtungsumkehr weiterzutransportierende Sendungen ohne Behinderung zu einem sich anschließenden dritten abführenden Deckbandtransportmittel transportierbar sind.In order to inject the mail items back into the stream of mail items, the two shroud transport means that remove the mail items during the return transport are advantageously guided to a junction with an exit. In order to ensure that even consignments can pass through the device without hindrance, it is advantageous to arrange the ends of the controlled and reversibly driven conveyor lines so far apart that consignments that can be transported without reversing the direction can be transported without hindrance to a subsequent third transferring shroud conveyor are.

Zur aufwandsarmen Ausführung der gesteuert und reversierbar angetriebenen 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.In order to carry out the controlled and reversibly driven conveyor lines with little effort, it is advantageous if they each consist of an outer, endless cover band, which is guided over two deflection rollers, and a common inner cover band, which is guided over the drive roller and a further deflection roller.

Eine weitere Möglichkeit zur aufwandsarmen Ausführung der gesteuert und reversierbar angetriebenen 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.Another option for the low-cost execution of the controlled and reversibly driven conveyor lines, but with a limited range of mailing formats, is to provide an outer, endless shroud for each of these, which is guided over two deflection rollers, and the common drive roller.

Um diese Einschränkungen im Sendungsformatspektrum zu besei- tigen, ist es vorteilhaft, zum Klemmen der Sendungen in beiden Förderstrecken noch eine nicht angetriebene Andruckrolle vorzusehen.In order to remove these restrictions in the mailing format spectrum, it is advantageous to provide a non-driven pressure roller for clamping the mailings 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 ein- gespart werden. Weiterhin ist es vorteilhaft, als Detektionsmittel für die Sendungshinterkanten eine Lichtschranke einzusetzen.It is also advantageous to provide only one driven, continuous endless belt guided by rollers as the outer endless belt of each shroud transport path following the switch and as the inner endless belt of the associated shroud transport means which is to be removed during the return transport. This means that a driven, endless, rotating belt can be saved. Furthermore, it is advantageous to use a light barrier as the detection means for the rear edges of the consignment.

Anschließend wird die Erfindung in einem Ausführungsbeispiel anhand der Zeichnung erläutert. Dabei zeigenThe invention is then explained in an exemplary embodiment with reference to the drawing. Show

FIG 1 eine schematische Draufsicht auf die Vorrichtung zur Richtungsumkehr,1 shows a schematic plan view of the device for reversing the direction,

FIG 2a-d sehr schematische Draufsichten auf die Vorrichtung zur Richtungsumkehr zu verschiedenen, aufeinander folgenden Zeitpunkten.2a-d are very schematic plan views of the device for reversing the 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 ü- ber 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 ümlenkrollen 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 zurücktrans- portiert werden müssen oder die länger als die reversierbare Förderstrecke sind, durch den Spalt zwischen den Umlenkrol- len 16,21 ungehindert einem folgenden Transportmittel zugeführt werden können. Da die Transportrichtungen der Deckband- ransportstrecken und der jeweils nachfolgenden Förderstrecken zueinander geneigt sind, ergibt sich ein notwendiger Um- schlingungswinkel, mit dem die Sendungen 30,31,32 um die An- criebstrommel 18 geführt werden.The flat mail items 30, 31, 32 are routed alternately via a shroud conveyor 1 (not shown in detail here) and a controllable switch 2 to two shroud transport routes which run apart at an acute angle. The right cover band 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. Correspondingly, the left cover band transport section also consists of a third endless belt 9, which is deflected and returned via a third deflecting roller 10, and a fourth endless belt 11, which is deflected and returned via a fourth deflecting roller 12. Each shroud conveyor line routes the consignments to a controlled and reversibly driven conveyor line. Both conveyor lines converge at an acute angle in the direction of entry. The conveyor line following the right shroud conveyor line consists of a fifth, outer endless belt 15, which is deflected via two deflection rollers 16 and a sixth, inner endless belt 17, which runs over a larger drive roller 18 and a smaller deflection roller 19. This endless belt 17 is on the same time on the opposite side, the inner endless belt of the conveyor track following the left cover belt transport section, which still has a seventh, outer endless belt 20 which is deflected via two deflecting rollers 21. The deflection rollers 16, 21 of the conveyor lines, which are located close to one another, are spaced apart from one another such that the thickest mail items 30, 31, 32, which do not have to be transported back or which are longer than the reversible conveyor line, pass through the gap between the deflection rollers. len 16.21 can be fed unhindered to a subsequent means of transport. Since the directions of transport of the shroud conveyor lines and the subsequent conveyor lines are inclined to one another, there is a necessary wrap angle with which the mail items 30, 31, 32 are guided around the drive drum 18.

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 Deckbandtrans- portmittel geleitet. Diese bestehen jeweils aus äußeren, überSince the conveyor lines are inclined inward, the mail items 30, 31, 32 are conveyed outside on both sides past the supplying shroud transport lines and the supplying shroud conveyor means 1 into the outgoing shroud transport means. These each consist of outer, over

Umlenktrommein 8,14 umgelenkten endlosen Bändern 7,13 und inneren Bändern 3,9, welche gleichzeitig die äußeren Bänder der zuführenden Deckbandtransportstrecken sind.Deflection drum in 8.14 deflected endless belts 7.13 and inner belts 3.9, which are at the same time the outer belts of the feeding cover band transport lines.

Dadurch, dass die Sendungen 30,31,32 im Wechsel auf die zu- führenden Deckbandtransportstrecken aufgeteilt werden und somit im Wechsel auf den gegenüberliegenden Seiten der An- criebstrommel 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 Förder- strecke verlassen hat. Damit ist es möglich, trotz der Brems- und Beschleunigungsvorgänge mit nur einer Antriebstrommel 18 kleine Lücken zwischen den reversierten Sendungen 30,31,32 zu realisieren. Wann die Vorder- und Hinterkanten der Sendun- gen 30,31,32 die beschriebenen Positionen erreicht haben, wird mittels Lichtschranken Lil bis Li3 und des Streckentaktes ermittelt.Because the mail items 30, 31, 32 are divided alternately between the shroud transport lines to be fed and are thus alternately guided into the reversible conveyor lines on the opposite sides of the drive drum 18, the previous one is no longer necessary as before To move mail item 31 out of the reverse conveyor line before the subsequent mail item 32 enters it. It is only necessary that the drive drum 18 has reached its nominal speed when the subsequent consignment 32 enters the reversing conveyor section at this nominal speed and that the braking process is only started as soon as the rear edge of the consignment 32 entering the reversible conveyor section the feeding cover band transport section and the previous broadcast 31 the reversible conveyor has left the route. This makes it possible to implement 18 small gaps between the reversed items 30, 31, 32 despite the braking and acceleration processes using only one drive drum. When the front and rear edges of the items 30, 31, 32 have reached the positions described is determined by means of light barriers Lil to Li3 and the route clock.

Der zeitliche Ablauf wird anhand der Figuren 2a-d veranschau- licht.The time sequence is illustrated with the aid of FIGS. 2a-d.

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 Sen- düng 31 in das Deckbandtransportmittel 61 transportiert wird. Gleichzeitig wird die dritte Sendung 32 im Wechsel in der in Transportrichtung rechten zuführenden Deckbandtransport- strecke 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 Deckbandtransportstre- cke 40 angekommen und kann von der mit dieser Geschwindigkeit laufenden nachfolgenden Förderstrecke 50 übernommen werden. 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. In FIG. 2a, the first mail item 30 of the incoming mail flow has left the upper or right conveying line 50 in the feed direction and is transported reversed at the nominal speed by the associated removing cover band transport means 60. At the same time, the following second consignment 31 is still traveling at nominal speed into the conveyor section 51 on the other side and is braked starting at the time shown, at which the trailing edge is just leaving the assigned cover band transport section 41. In FIG. 2b, the second consignment 31 has come to a standstill, because of the inherent rigidity of the consignment 31, its rear edge has been pivoted in the direction of the associated discharging shroud transport means 61, as shown, and the drive drum 18 is started reversed, so that the second consignment 31 enters the Shroud conveyor 61 is transported. At the same time, the third consignment 32 is transported alternately in the shroud transport line 40 which feeds to the right in the transport direction at nominal speed. FIG. 2c shows a subsequent point in time at which the drive roller 18 was accelerated to the nominal speed and the second consignment 31 can therefore run into the discharging shroud transport means 61 running at this speed at nominal speed. In the meantime, the third consignment 32 has arrived at the end of the supply belt conveyor section 40 to be fed and can be taken over by the subsequent conveyor section 50 running at this speed. At the time shown in FIG. 2d, the second consignment 31 has meanwhile left the conveyor section 51 and the third consignment 32 has just left the last clamping point of the shroud conveyor section 40, so that the braking process for the conveyor section 50 can be started by the working drum 18. In the meantime, the fourth consignment 33 of the consignment stream has arrived at the switch and the further procedure is as described for FIGS. 2a-c, only on the other side of the drive drum 18.

Claims

Patentansprüche claims 1. Vorrichtung zur Richtungsumkehr von flachen Sendungen in Sendungssortieranlagen, mit einem zuführenden Deckbandför- dermittel (1), bestehend aus zwei endlosen, umlaufenden Bändern, zwischen denen die Sendungen (30,31,32) eingeklemmt hintereinander transportiert werden, einer Weiche (2) zur Aufteilung der Sendungen (30,31,32) im Wechsel auf zwei im spitzen Winkel auseinander laufende Deckband- transportstrecken (40,41) mit jeweils zwei endlosen Bändern (3,5/9,11), denen sich jeweils eine gesteuert und reversierbar angetriebene Förderstrecke (50,51), in der die Sendungen (30,31,32) ebenfalls geklemmt transportiert werden, anschließt, wobei beide Förderstrecken (50,51) durch eine zwischen ihnen angeordnete Antriebsrolle (18) angetrieben sind und die Sendungen (30,31,32) in einem solchen Umschlingungswinkel um die Antriebsrolle (18) geführt sind, dass die Sendungen (30,31,32) unter Berücksichtigung der Reibkräfte annähernd rutschfrei abgebremst und be- schleunigt werden, wobei jede Förderstrecke (50,51) so ausgeführt ist, dass sie die Sendungen (30,31,32) beim Rücktransport unter einem spitzen Winkel zur jeweiligen zuführenden Deckbandtransportstrecke (40,41) in ein abführendes Deckbandtransportmittel (60,61) mit zwei endlosen Bändern (3,7/9,13) leitet, wobei die Antriebssteuerung der Antriebsrolle (18) so ausgeführt ist, dass beim Einlaufen einer folgenden Sendung (32) in eine Förderstrecke (50,51) die vorhergehende zurücktransportierte Sendung (31) bereits auf Nenngeschwindigkeit beschleunigt ist, der Ab- bremsvorgang erst gestartet wird, wenn die Hinterkante der jeweiligen Sendung (32) die Deckbandtransportstrecke (40,41) verlassen hat und die vorhergehende Sendung (31) nicht mehr in einer der gesteuert und reversierbar angetriebenen Förderstrecken (50,51) geklemmt ist und wobei die Sendungen (30,31,32) in der Vorrichtung zu jedem Zeitpunkt kraftschlüssig geführt sind. 1. Device for reversing the direction of flat consignments in consignment sorting systems, with a feeding shroud conveyor (1), consisting of two endless, revolving conveyors, between which the consignments (30, 31, 32) are clamped one behind the other, a switch (2) to divide the mailings (30,31,32) alternately on two cover belt transport lines (40,41), which run apart at an acute angle, each with two endless belts (3,5 / 9,11), each of which is controlled and reversible Driven conveyor line (50, 51), in which the mail items (30, 31, 32) are also transported in a clamped manner, the two conveyor lines (50, 51) being driven by a drive roller (18) arranged between them and the mail items (30 , 31, 32) are guided in such a wrap angle around the drive roller (18) that the mail items (30, 31, 32) are braked and accelerated almost without slipping, taking into account the frictional forces i Each conveyor line (50, 51) is designed such that it sends the mail items (30, 31, 32) back at an acute angle to the respective feeding shroud transport line (40, 41) into a discharging shroud transport means (60, 61) with two endless Belts (3,7 / 9,13) conducts, wherein the drive control of the drive roller (18) is designed so that when a subsequent shipment (32) enters a conveyor line (50,51), the previous shipment (31) transported back Nominal speed is accelerated, the braking process is only started when the rear edge of the respective consignment (32) has left the shroud transport section (40, 41) and the previous consignment (31) is no longer in one of the controlled and reversibly driven conveyor sections (50, 51) is clamped and the items (30, 31, 32) are guided in the device in a force-fitting manner at all times. 2. Vorrichtung nach Anspruch 1, wobei die beiden die Sendungen (30,31,32) beim Rücktransport abführenden Deckbandtransportmittel (60,61) an eine Zusammenführung mit einem Ausgang geführt sind.2. Apparatus according to claim 1, wherein the two the mail items (30, 31, 32) carrying back the cover band transport means (60, 61) are guided to a junction with an exit. 3. Vorrichtung nach Anspruch 1, wobei die Enden der gesteuert und reversierbar angetriebenen Förderstrecken (50,51) soweit voneinander entfernt angeordnet sind, dass ohne Richtungsumkehr weiterzutransportierende Sendungen ohne Behin- derung zu einem sich anschließenden dritten abführenden Deckbandtransportmittel transportierbar sind.3. The device according to claim 1, wherein the ends of the controlled and reversibly driven conveyor lines (50, 51) are arranged so far apart from one another that consignments to be transported further can be transported without hindrance to a subsequent third discharging shroud transport means without hindrance. 4. Vorrichtung nach Anspruch 1, wobei die beiden gesteuert und reversierbar angetriebenen Förderstrecken (50,51) je- weils aus einem äußeren, endlosen Deckband (15,20), das über zwei Umlenkrollen (16,21) geführt ist, und einem gemeinsamen inneren Deckband (17) , das über die Antriebsrolle (18) und eine weitere Umlenkrolle (19) geführt ist, bestehen.4. The device according to claim 1, wherein the two controlled and reversibly driven conveyor lines (50, 51) each consist of an outer, endless shroud (15, 20), which is guided over two deflection rollers (16, 21), and a common one inner shroud (17), which is guided over the drive roller (18) and a further deflection roller (19). 5. Vorrichtung nach Anspruch 1, wobei die beiden gesteuert und reversierbar angetriebenen Förderstrecken (50,51) jeweils aus einem äußeren, endlosen Deckband (15,20), das über zwei Umlenkrollen (16,21) geführt ist, und der ge- meinsamen Antriebsrolle (18) bestehen.5. The device according to claim 1, wherein the two controlled and reversibly driven conveyor sections (50, 51) each consist of an outer, endless shroud (15, 20), which is guided over two deflection rollers (16, 21), and the joint Drive roller (18) exist. 6. Vorrichtung nach Anspruch 5, wobei zum Klemmen der Sendungen (30,31,32) in beiden Förderstrecken (50,51) noch eine nicht angetriebene Andruckrolle (19) vorgesehen ist.6. The device according to claim 5, wherein a non-driven pressure roller (19) is also provided for clamping the mailpieces (30, 31, 32) in both conveyor lines (50, 51). 7. Vorrichtung nach Anspruch 1, wobei jeweils als äußeres endloses Band jeder der Weiche (2) folgenden Deckbandtransportstrecken (40,41) und als inneres endloses Band des zugeordneten, beim Rücktransport abführenden Deckband- transportmittels (60,61) nur ein angetriebenes, durch Rollen (4,10) geführtes, umlaufendes Endlosband (3,9) vorge- sehen ist .7. The device according to claim 1, wherein in each case as the outer endless belt of each of the switch (2) following shroud transport routes (40, 41) and as the inner endless belt of the associated shroud transport means (60, 61) leading away during return transport, only one driven one Rolling (4,10) guided, continuous endless belt (3,9) see is. 8. Vorrichtung nach Anspruch 1, wobei die durch die Berührungspunkte der Rollen (4,10,18,19) mit den Bän- dern (5,7,11,13,15,20) festgelegten Klemmabstände kleiner als die kürzeste Sendung sind.8. The device 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 shipment. 9. Vorrichtung nach Anspruch 1, wobei als Detektionsmittel für die Sendungskanten Lichtschranken (Lil, Li2 , Li3) vorge- sehen sind. 9. The device according to claim 1, wherein light barriers (Lil, Li2, Li3) are provided as detection means for the mailing edges.
EP05732326A 2004-05-29 2005-04-20 Device for reversal of direction of planar letters Expired - Lifetime 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

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

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

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DE502005007947D1 (en) 2009-10-01
US20070215438A1 (en) 2007-09-20
DE102004026362B3 (en) 2005-11-03
JP2007531677A (en) 2007-11-08
CN1960924A (en) 2007-05-09
US7306219B2 (en) 2007-12-11
EP1753681B1 (en) 2009-08-19
WO2005115892A1 (en) 2005-12-08
CN100542917C (en) 2009-09-23

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