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EP1678065B1 - Device for singulating vertically positioned flat mailings from a stack of mail - Google Patents

Device for singulating vertically positioned flat mailings from a stack of mail Download PDF

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Publication number
EP1678065B1
EP1678065B1 EP04790890A EP04790890A EP1678065B1 EP 1678065 B1 EP1678065 B1 EP 1678065B1 EP 04790890 A EP04790890 A EP 04790890A EP 04790890 A EP04790890 A EP 04790890A EP 1678065 B1 EP1678065 B1 EP 1678065B1
Authority
EP
European Patent Office
Prior art keywords
discharge
belts
stack
rockers
singulating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP04790890A
Other languages
German (de)
French (fr)
Other versions
EP1678065A1 (en
Inventor
Michael Schwarzbauer
Hauke Luebben
Oliver Kutzer
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 EP1678065A1 publication Critical patent/EP1678065A1/en
Application granted granted Critical
Publication of EP1678065B1 publication Critical patent/EP1678065B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B65H1/00—Supports or magazines for piles from which articles are to be separated
    • B65H1/02—Supports or magazines for piles from which articles are to be separated adapted to support articles on edge
    • B65H1/025—Supports or magazines for piles from which articles are to be separated adapted to support articles on edge with controlled positively-acting mechanical devices for advancing the pile to present the articles to the separating device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C3/00—Sorting according to destination
    • B07C3/02—Apparatus characterised by the means used for distribution
    • B07C3/08—Apparatus characterised by the means used for distribution using arrangements of conveyors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H3/00—Separating articles from piles
    • B65H3/02—Separating articles from piles using friction forces between articles and separator
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H3/00—Separating articles from piles
    • B65H3/02—Separating articles from piles using friction forces between articles and separator
    • B65H3/04—Endless-belt separators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H3/00—Separating articles from piles
    • B65H3/46—Supplementary devices or measures to assist separation or prevent double feed
    • B65H3/52—Friction retainers acting on under or rear side of article being separated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H3/00—Separating articles from piles
    • B65H3/46—Supplementary devices or measures to assist separation or prevent double feed
    • B65H3/52—Friction retainers acting on under or rear side of article being separated
    • B65H3/5246—Driven retainers, i.e. the motion thereof being provided by a dedicated drive
    • 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
    • B65H2301/35—Spacing
    • 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
    • B65H2515/00—Physical entities not provided for in groups B65H2511/00 or B65H2513/00
    • B65H2515/30—Forces; Stresses
    • B65H2515/34—Pressure, e.g. fluid pressure
    • 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
    • B65H2553/80—Arangement of the sensing means
    • B65H2553/82—Arangement of the sensing means with regard to the direction of transport of the handled material

Definitions

  • the invention relates to a device for separating flat items in a standing position from a stack of items.
  • the invention is therefore based on the object to provide a device for separating shipments, which processes both types of programs with high throughput and low multiple deduction and shipment damage rate.
  • each Abzugsschwinge is associated with a sensor which emits a drive start signal at a predetermined stacking pressure on the associated trigger rocker.
  • an underfloor belt along the transport path.
  • the support element ends at a fixed distance from the undeflected trigger arms. From the end of the support element at the beginning of the trigger pullout following second trigger belt and further pressed resiliently to these and other pullout belt at least one still following separation stage is a flexible, elongated retaining element arranged.
  • the distance of the support element from the front end of the second trigger belt in the transport direction is greater than the maximum allowable shipment length.
  • the control of the drives of underfloor belt and pullout belt is designed so that at a fixed stack pressure on the trigger arms the drives are started and the drives are stopped again or reduced in speed, as soon as the following in the second pullout belt singling consignment over the second Abzugsriemen higher transport speed of these pullout belts has. After the emergence of a gap to the following Transmission, detected by means of a light barrier line arranged along the transport path, the drives of the trigger arms and the second trigger belt are restarted or switched to their normal take-off speed.
  • the separation of the foremost broadcasts thus takes place only when it is free of stacking forces of the overall stack. This avoids that the printing forces emanating from the entire stack of mail is still present on the mail to be singled at the transition point to the second pullout belt.
  • the retaining force acting from the retaining element against the transport direction of the mailings can therefore be minimized. This is the prerequisite for a mailing-saving separation process.
  • vacuum chambers are advantageously arranged behind the second trigger belt and the trigger belt of the other separation stages, which pull the shipments to the trigger belt during transport.
  • the negative pressure of the vacuum chamber of the subsequent separation stage is advantageously greater than the negative pressure of the vacuum chamber of the second pressure belt.
  • Stapled mailings e.g. open journals
  • a metal sensor for detecting staples at the transition between trigger and second trigger belt which outputs a detected staple signal to the drive control, which then reacts with a reduction of the take-off speeds and accelerations until the program with the staple has left the separating device including all separating stages.
  • the transport speed of the underfloor belt is less than that of the trigger belt of the trigger arm. It can thereby be ensured that, even if the frontmost item is slightly set back from the subsequent item in the stack, the foremost item first reaches the second delivery amount.
  • pivot point of the trigger arms is located at the rear end in the drawing direction on the drive axle.
  • the figure shows a schematic plan view of the separating device.
  • the in the input area 1 on the vertically aligned to the Sendungsunterkanten stack of mail 2 is on Unterflurriemen 3, further aligned at the front-side leading edges by a support member 4 and held by two stacking supports 5,5a.
  • the stack of mail 2 is transported at the start of the device by the Unterflurriemen 3 and the stack supports 5,5a to Fritationsriemen 6 an erector 9.
  • the friction belts 6 run in the first loading in synchronism with the underfloor belt 3 and promote the mailing stack 2 as long as the trigger arms 7a, 7b until they have reached their working position, ie until a specified stack pressure the trigger arms 7a, 7b has deflected a certain amount against a spring force , This working position is detected by distance sensors 8a and 8b. After reaching the working position of the trigger arms 7a, 7b and additionally operating a presence sensor 36 for the presence of transmissions, all drives are started.
  • the speed of the pullout belts of the separation stage 14 is higher than that of the pullout belts of the take-off rockers 7a, 7b and the coupled second pullout belts 13.
  • the transmission speed is detected via a motion sensor 20, in which a scanning roller runs over the transmission and measures its speed.
  • the foremost consignment is now safely caught by the transport belt of the separation stage 14.
  • the transport effect of the trigger belt after the trigger arm 7a, 7b is supported by vacuum chambers 30,31.
  • the underfloor belts 10 and 11 additionally support the transport of heavy shipments throughout the separation area.
  • the underfloor belt 11 runs at a much lower speed than the pullout belt of the separation stage 14 and has a relatively low coefficient of friction for the lower edge of the shipment running on it.
  • the trigger arms 7a, 7b are two oscillatory arms arranged one above the other, which can be pushed independently of one another into their working position by the pressure of the mail stack 2. During continuous operation, the pull-off rockers 7a, 7b exert a permanent spring pressure on the mailing stack 2 to be singled.
  • the Nachrucn of the stack of mail 2 by the Unterflurriemen 3 and the stack supports 5,5a is controlled by the distance sensors 8a, 8b.
  • the resulting stacking gap is absorbed by the swinging motion.
  • the supply of the mail stack 2 can thus be done with less dynamics.
  • the resulting stacking forces are significantly lower.
  • a metal sensor 35 is arranged for the detection of staples. This metal sensor 35 serves to identify stapled items (eg open magazines). Since stapled items are particularly susceptible to damage, after the detection of a staple the speeds of the trigger belt and the acceleration at the transition of the transport section 12 to the separating stage 14 is reduced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Controlling Sheets Or Webs (AREA)
  • Pile Receivers (AREA)
  • Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)

Abstract

The invention relates to a device in which at least two discharge rockers (7a, 7b) are disposed on top of each other, said discharge rockers (7a, 7b) being adjacent to revolving second discharge belts (13) that are arranged in a fixed manner along the path of travel. The supporting element (4) in relation to which the stack of mail (2) is aligned ends at a defined distance from the undeflected discharge rockers (7a, 7b). A flexible, elongate retaining element (19) is placed in a resiliently pressing manner from the end of the supporting element (4) to the beginning of the second discharge belts (13) located downstream of the discharge rockers (7a, 7b) and further on to said discharge belts (13) and to other discharge belts of successive singulating stages (14). The distance of the supporting element (4) from the leading end of the second discharge belts (13) relative to the direction of travel is greater than the maximum permissible length of a mailing.

Description

Die Erfindung betrifft eine Vorrichtung zum Vereinzeln von flachen Sendungen in stehender Position aus einem Sendungsstapel.The invention relates to a device for separating flat items in a standing position from a stack of items.

Bisher werden für die Vereinzelung von unterschiedlichen Sendungsarten (Briefe, Karten / Großbriefe, Zeitschriften, Prospekte) hauptsächlich spezielle Vereinzelungsvorrichtungen eingesetzt.
In einer Vereinzelung für Briefe ( DE OS 26 13 261 ) wird ein Stapel stehender Sendungen an einem Stützelement ausgerichtet, auf Unterflurriemen von einer Stapelstütze gehalten in Richtung der Vereinzelungsstufe transportiert. Die Vereinzelung besitzt umlaufende Abzugsriemen aufweisende Abzugsschwingen, deren Drehpunkt sich am stromabwärtigen Ende befindet. Eine weitere Vereinzelung für Briefe ( US 5 074 540 ) weist ebenfalls die Sendungen zuführende Unterflurriemen mit einer Stapelstütze, einer Abzugsschwinge und einer Vereinzelungsstufe auf. Diese Vereinzelungen können Großbriefe nur in einem sehr eingeschränkten Umfang verarbeiten (Einschränkungen der Sendungsgröße, -dicke, -beschaffenheit).
Bekannt wurde gemäß US 2002/079637 A1 auch eine Blattzuführeinrichtung, die Blätter aus einem Stapel mit variabler Geschwindigkeit entsprechend der Blattlänge vereinzelt und nachfolgenden Einrichtungen zuführt. Die die Blätter vom Stapel abziehenden Reibriemen erstrecken sich stromabwärts über den Stapel hinaus. Dort befinden sich gegenüber am Transportpfad langsam laufende Riemen zum Separieren von doppelt abgezogenen Blättern. Diese Einrichtung kann nur mit gleichmäßigem Blattgut ordnungsgemäß funktionieren.
Bekannt wurden auch Vereinzelungen für Großbriefe ( US 5 456 457 A , US 5 494 276 A ), die aber Standardbriefe nur unergonomisch und mit limitiertem Durchsatz verarbeiten können. Die Vorrichtung gemäß US 5 494 276 A besitzt dabei auch Unterflurriemen und eine Stapelstütze für die Stapelzuführung. Darüber hinaus beschreibt die US 6 003 857 A eine Vereinzelungsvorrichtung, die für Mischpost geeignet ist.So far, for the separation of different types of mail (letters, cards / large letters, magazines, leaflets) mainly special separation devices are used.
In a separation for letters ( DE OS 26 13 261 ), a stack of stationary mail items is aligned with a support element, transported on sub-floor belts by a stack support in the direction of the singling stage. The separation has rotating trigger pulleys with trigger arms, the fulcrum of which is located at the downstream end. Another separation for letters ( US 5 074 540 ) also has the consignments feeding sub-floor belt with a stack support, a swing arm and a singulation stage. These separations can process large letters only to a very limited extent (restrictions on the size, thickness, quality).
It became known according to US 2002/079637 A1 also a sheet feeder which separates sheets from a variable speed stack according to the sheet length and feeds to subsequent means. The friction belts peeling off the sheets from the stack extend downstream beyond the stack. There are opposite to the transport path slow-moving belt for separating double-peeled sheets. This device can only work properly with even sheet material.
Also became singles for large letters ( US 5 456 457 A . US 5 494 276 A ), but standard letters can only be processed unergonomically and with limited throughput. The device according to US 5 494 276 A It also has underlatch straps and a stacking support for the stack feed. In addition, the describes US Pat. No. 6,003,857 A a separating device suitable for mixed mail.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Vorrichtung zum Vereinzeln von Sendungen zu schaffen, die beide Sendungsarten mit hohem Durchsatz und geringer Mehrfachabzugsrate sowie Sendungsbeschädigungsrate verarbeitet.The invention is therefore based on the object to provide a device for separating shipments, which processes both types of programs with high throughput and low multiple deduction and shipment damage rate.

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.

Dabei sind übereinander mindestens zwei Abzugsschwingen angeordnet, denen sich entlang des Transportpfades fest angeordnete, umlaufende zweite Abzugsriemen anschließen, wobei jeder Abzugsschwinge ein Sensor zugeordnet ist, der bei einem festgelegten Stapeldruck an der zugeordneten Abzugsschwinge ein Antriebsstartsignal abgibt. Vor den Abzugsschwingen und den zweiten Abzugsriemen befindet sich entlang des Transportpfades ein Unterflurband. Das Stützelement endet in festgelegtem Abstand von den unausgelenkten Abzugsschwingen. Vom Ende des Stützelementes an den Beginn der den Abzugsschwingen folgenden zweiten Abzugsriemen und weiter an diese und an weitere Abzugsriemen mindestens einer noch folgenden Vereinzelungsstufe federnd angedrückt ist ein flexibles, langgestrecktes Rückhalteelement angeordnet. Der Abstand des Stützelementes vom vorderen Ende der zweiten Abzugsriemen in Transportrichtung ist größer als die maximal zulässige Sendungslänge. Die Steuerung der Antriebe von Unterflurband und Abzugsriemen ist so ausgebildet, dass bei festgelegtem Stapeldruck an den Abzugsschwingen die Antriebe gestartet werden und die Antriebe wieder gestoppt oder in ihrer Geschwindigkeit reduziert werden, sobald die in der den zweiten Abzugsriemen folgenden Vereinzelungsstufe gefasste Sendung die gegenüber den zweiten Abzugsriemen höhere Transportgeschwindigkeit dieser Abzugsriemen aufweist. Nach dem Entstehen einer Lücke zur nachfolgenden Sendung, detektiert mittels einer entlang des Transportpfades angeordneten Lichtschrankenzeile, werden die Antriebe der Abzugsschwingen und der zweiten Abzugsriemen wieder gestartet bzw. auf ihre normale Abzugsgeschwindigkeit umgeschaltet.In this case, at least two Abzugsschwingen are arranged one above the other, which along the transport path fixed, surrounding second trigger belt, each Abzugsschwinge is associated with a sensor which emits a drive start signal at a predetermined stacking pressure on the associated trigger rocker. In front of the trigger arms and the second trigger belt, there is an underfloor belt along the transport path. The support element ends at a fixed distance from the undeflected trigger arms. From the end of the support element at the beginning of the trigger pullout following second trigger belt and further pressed resiliently to these and other pullout belt at least one still following separation stage is a flexible, elongated retaining element arranged. The distance of the support element from the front end of the second trigger belt in the transport direction is greater than the maximum allowable shipment length. The control of the drives of underfloor belt and pullout belt is designed so that at a fixed stack pressure on the trigger arms the drives are started and the drives are stopped again or reduced in speed, as soon as the following in the second pullout belt singling consignment over the second Abzugsriemen higher transport speed of these pullout belts has. After the emergence of a gap to the following Transmission, detected by means of a light barrier line arranged along the transport path, the drives of the trigger arms and the second trigger belt are restarted or switched to their normal take-off speed.

Die Vereinzelung der vordersten Sendungen erfolgt also erst dann, wenn diese frei von Stapeldruckkräften des Gesamtstapels ist. Hierdurch wird vermieden, dass die vom gesamten Sendungsstapel ausgehenden Druckkräfte auf die zu vereinzelnde Sendung an der Übergangsstelle zu den zweiten Abzugsriemen noch vorhanden ist. Die vom Rückhalteelement gegen die Transportrichtung der Sendungen wirkende Rückhaltekraft kann daher minimiert werden. Dies ist die Voraussetzung für einen sendungsschonenden Vereinzelungsprozess.
Durch die Detektion der Sendungsgeschwindigkeit mit Hilfe der Geschwindigkeitssensoren werden die nachfolgenden Sendungen zum frühest möglichen Zeitpunkt gestoppt, d.h. die Lücke wird frühestmöglich erzeugt.The separation of the foremost broadcasts thus takes place only when it is free of stacking forces of the overall stack. This avoids that the printing forces emanating from the entire stack of mail is still present on the mail to be singled at the transition point to the second pullout belt. The retaining force acting from the retaining element against the transport direction of the mailings can therefore be minimized. This is the prerequisite for a mailing-saving separation process.
By detecting the transmission speed by means of the speed sensors, the subsequent programs are stopped at the earliest possible time, ie the gap is generated as early as possible.

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

Um den Andruck der Sendungen an die Abzugsriemen und damit auch die Mitnahmekraft zu erhöhen, sind hinter den zweiten Abzugsriemen und den Abzugsriemen der weiteren Vereinzelungsstufen vorteilhaft Unterdruckkammern angeordnet, die während des Transportes die Sendungen an die Abzugsriemen ziehen.In order to increase the pressure of the shipments to the trigger belt and thus also the driving force, vacuum chambers are advantageously arranged behind the second trigger belt and the trigger belt of the other separation stages, which pull the shipments to the trigger belt during transport.

Damit die Sendungen von den zweiten Abzugsriemen sicher an die nachfolgende Vereinzelungsstufe übergeben werden, ist der Unterdruck der Unterdruckkammer der nachfolgenden Vereinzelungsstufe vorteilhaft größer als der Unterdruck der Unterdruckkammer der zweiten Andruckriemen.Thus, the shipments are safely transferred from the second trigger belt to the subsequent separation stage, the negative pressure of the vacuum chamber of the subsequent separation stage is advantageously greater than the negative pressure of the vacuum chamber of the second pressure belt.

Zur aufwandsarmen Ermittlung der Sendungsgeschwindigkeiten im Vereinzelungsprozess ist es vorteilhaft, stationäre Abtastrollen oder -bänder vorzusehen.For the low-effort determination of the transmission speeds in the singulation process, it is advantageous to provide stationary scanning rollers or belts.

Bei Schrägstellung der Sendungen nahe der Abzugsschwingen ist es zur Behebung der Schrägstellung bei geringem Stapeldruck vorteilhaft, zwischen den Unterflurriemen des Eingabebereiches und dem entlang des Transportpfades verlaufenden Unterflurband eine Aufstelleinrichtung mit steuerbar angetriebenen Friktionsriemen anzuordnen, die bei mittels der Auslenkung der Abzugsschwingen ermittelter Schrägstellung des vorderen Teils des Stapels so antreibbar sind, dass der vordere Teil des Stapels aufgerichtet wird.When skewing the broadcasts near the trigger arms, it is advantageous to correct the skew at low stacking pressure between the Unterflurriemen the input area and running along the transport path underfloor belt an erector with controllable driven friction belt, which determined by means of the deflection of the trigger arms inclined position of the front part of the stack are drivable so that the front part of the stack is erected.

Da geheftete Sendungen, z.B. offene Zeitschriften, sehr anfällig gegen Beschädigungen sind, ist es vorteilhaft, am Übergang zwischen Abzugsschwinge und zweiten Abzugsriemen einen Metallsensor zum Detektieren von Heftklammern anzuordnen, der bei erkannter Heftklammer ein Signal an die Antriebssteuerung ausgibt, die hierauf mit einer Reduzierung der Abzugsgeschwindigkeiten und -beschleunigungen reagiert, bis die Sendung mit der Heftklammer die Vereinzelungsvorrichtung einschließlich aller Vereinzelungsstufen verlassen hat.Stapled mailings, e.g. open journals, are very susceptible to damage, it is advantageous to arrange a metal sensor for detecting staples at the transition between trigger and second trigger belt, which outputs a detected staple signal to the drive control, which then reacts with a reduction of the take-off speeds and accelerations until the program with the staple has left the separating device including all separating stages.

Vorteilhaft ist es auch, wenn die Transportgeschwindigkeit des Unterflurbandes geringer als die der Abzugsriemen der Abzugsschwinge ist. Dadurch kann sichergestellt werden, dass auch bei etwas zurückstehender vorderster Sendung gegenüber der nachfolgenden Sendung im Stapel die vorderste Sendung zuerst die zweiten Abzugsriemen erreicht.It is also advantageous if the transport speed of the underfloor belt is less than that of the trigger belt of the trigger arm. It can thereby be ensured that, even if the frontmost item is slightly set back from the subsequent item in the stack, the foremost item first reaches the second delivery amount.

Weiterhin ist es vorteilhaft, wenn sich der Drehpunkt der Abzugsschwingen am in Abzugsrichtung hinteren Ende auf der Antriebsachse befindet.Furthermore, it is advantageous if the pivot point of the trigger arms is located at the rear end in the drawing direction on the drive axle.

Anschließend wird die Erfindung in einem Ausführungsbeispiel anhand der Zeichnung erläutert.Subsequently, the invention will be explained in an embodiment with reference to the drawing.

Dabei zeigt die Figur eine schematische Draufsicht auf die Vereinzelungsvorrichtung.The figure shows a schematic plan view of the separating device.

Der im Eingabebereich 1 auf dem senkrecht auf die Sendungsunterkanten ausgerichtete Sendungsstapel 2 steht auf Unterflurriemen 3, ausgerichtet weiterhin an den stirnseitigen Vorderkanten durch ein Stützelement 4 sowie gehalten durch zwei Stapelstützen 5,5a.
Der Sendungsstapel 2 wird bei Start der Vorrichtung durch die Unterflurriemen 3 und die Stapelstützen 5,5a zu Friktionsriemen 6 einer Aufstelleinrichtung 9 transportiert.
Die Friktionsriemen 6 laufen bei der Erstbeladung synchron zu den Unterflurriemen 3 und fördern den Sendungsstapel 2 solange in Richtung Abzugsschwingen 7a,7b, bis diese ihre Arbeitsposition erreicht haben, d.h. bis ein festgelegter Stapeldruck die Abzugsschwingen 7a,7b einen bestimmten Betrag gegen eine Federkraft ausgelenkt hat. Diese Arbeitsposition wird durch Abstandssensoren 8a und 8b detektiert. Nach Erreichen der Arbeitsposition der Abzugsschwingen 7a,7b und zusätzlichem Betätigen eines Anwesenheitssensors 36 für die Anwesenheit von Sendungen werden sämtliche Antriebe gestartet. Dies sind die Antriebe eines ersten Unterflurbandes 10 im Bereich der Abzugsschwingen 7a,7b und nachfolgender zweiter Abzugsriemen 13, eines Unterflurbandes 11 einer Vereinzelungsstufe 14, der Abzugsriemen der Abzugsschwingen 7a,7b, der zweiten Abzugsriemen 13, der Abzugsriemen der Vereinzelungsstufe 14 und von Übernahmerollen 15.
Der vordere Bereich des Sendungsstapels, der sich auf dem Unterflurband 10 befindet, wird entlang der Abzugsschwingen 7a,7b und der zweiten Abzugsriemen 13 zur Vereinzelungsstufe 14 transportiert. Die vorderste Sendung 16 des Sendungsstapels wird zusätzlich durch die Antriebsriemen der beiden Abzugsschwingen 7a,7b, welche schneller als das Unterflurband 10 laufen, transportiert. Dadurch wird gewährleistet, dass die vorderste Sendung 16 auch bei negativem Vorderkantenversatz zur nachfolgenden Sendung die Vereinzelungsstufe 14 als erste Sendung erreicht.
Vom Ende des Stützelementes 4 an den Beginn der den Abzugsschwingen 7a,7b folgenden zweiten Abzugsriemen 13 und weiter an diese und an die Abzugsriemen der folgenden Vereinzelungsstufe 14 verläuft federnd angedrückt ein flexibles, langgestrecktes Rückhalteelement 19.
Das Unterflurband 10 wird mit Betätigung eines Sensors 17, der meldet, wenn der Raum vor den Abzugsschwingen 7a,7b mit Sendungen gefüllt ist, gestoppt bzw. in der Geschwindigkeit stark reduziert. Der Transportabschnitt 12 (Abzugsschwingen 7a,7b und zweite Abzugsriemen 13) ist nun durch einen geschuppten Sendungsstrom gefüllt.
Die Länge des Transportabschnittes 12a (Abstand des Stützelementes 4 vom in Transportrichtung vorderen Ende der zweiten Abzugsriemen 13) muss größer sein als die maximal zulässige Sendungslänge. Hierdurch wird vermieden, dass die vom gesamten Sendungsstapel 2 ausgehenden Druckkräfte auf die zu vereinzelnde Sendung an der Übergangsstelle zur Vereinzelungsstufe 14 noch vorhanden ist. Die vom Rückhalteelement 19 gegen die Transportrichtung der Sendungen wirkende Rückhaltekraft kann daher minimiert werden. Dieses ist die Voraussetzung für einen sendungsschonenden Vereinzelungsprozess.The in the input area 1 on the vertically aligned to the Sendungsunterkanten stack of mail 2 is on Unterflurriemen 3, further aligned at the front-side leading edges by a support member 4 and held by two stacking supports 5,5a.
The stack of mail 2 is transported at the start of the device by the Unterflurriemen 3 and the stack supports 5,5a to Friktionsriemen 6 an erector 9.
The friction belts 6 run in the first loading in synchronism with the underfloor belt 3 and promote the mailing stack 2 as long as the trigger arms 7a, 7b until they have reached their working position, ie until a specified stack pressure the trigger arms 7a, 7b has deflected a certain amount against a spring force , This working position is detected by distance sensors 8a and 8b. After reaching the working position of the trigger arms 7a, 7b and additionally operating a presence sensor 36 for the presence of transmissions, all drives are started. These are the drives of a first underfloor belt 10 in the area of the withdrawal rockers 7a, 7b and subsequent second removal belt 13, an underfloor belt 11 a separation stage 14, the trigger belt of the trigger arms 7a, 7b, the second pullout belt 13, the pullout belt of the separation stage 14 and take-over rollers 15th ,
The front portion of the stack of mail, which is located on the underfloor belt 10, is transported along the withdrawal rockers 7a, 7b and the second trigger belt 13 to the separating stage 14. The foremost consignment 16 of the mailing stack is additionally transported by the drive belts of the two trigger rockers 7a, 7b, which run faster than the underfloor belt 10. This ensures that the foremost program 16 is also at a negative front edge offset to the subsequent broadcast the separation stage 14 reaches as the first broadcast.
From the end of the support element 4 at the beginning of the trigger rocker 7a, 7b following second trigger belt 13 and further to this and to the trigger belt of the following separation stage 14 is resiliently pressed a flexible, elongated retaining member 19th
The underfloor belt 10 is stopped or greatly reduced in speed with the operation of a sensor 17, which signals when the space in front of the trigger rockers 7a, 7b is filled with programs. The transport section 12 (take-off rockers 7a, 7b and second take-off belt 13) is now filled by a shingled stream of mail.
The length of the transport section 12a (distance of the support element 4 from the front in the transport direction end of the second trigger belt 13) must be greater than the maximum allowable transmission length. This avoids that the outgoing of the entire stack of mail 2 compressive forces on the item to be separated at the transition point to the separation stage 14 is still present. The retaining force acting from the retaining element 19 against the transport direction of the mailings can therefore be minimized. This is the prerequisite for a mailing-saving separation process.

Die Geschwindigkeit der Abzugsriemen der Vereinzelungsstufe 14 ist höher als die der Abzugsriemen der Abzugsschwingen 7a,7b und der gekoppelten zweiten Abzugsriemen 13. Sobald die vorderste Sendung die höhere Geschwindigkeit der Vereinzelungsstufe 14 erreicht hat, wird der Transportabschnitt Abzugsschwingen 12 gestoppt. Die Detektion der Sendungsgeschwindigkeit erfolgt über einen Bewegungssensor 20, bei dem eine Abtastrolle über die Sendung läuft und ihre Geschwindigkeit misst. Die vorderste Sendung ist nun von den Transportriemen der Vereinzelungsstufe 14 sicher gefasst. Die Transportwirkung der Abzugsriemen nach der Abzugsschwinge 7a,7b wird durch Unterdruckkammern 30,31 unterstützt.
Durch das Herausziehen der ersten Sendung gegen den nachfolgenden (im Transportabschnitt 12 stillstehenden) Sendungsstrom entsteht im Bereich des Übergangs zur Vereinzelungsstufe 14 bereits eine Lücke, welche durch eine Lichtschrankenzeile 18 detektiert wird. Sobald der gewünschte Abstand zur nachfolgenden Sendung erreicht ist, kann der Transportabschnitt 12 wieder gestartet werden. Der größte Anteil aller Lücken wird mit dieser Vorrichtung bereits am Übergang von Transportabschnitt 12 zur Vereinzelungsstufe 14 erzeugt.
Die Unterflurbänder 10 und 11 unterstützen zusätzlich den Transport von schweren Sendungen im gesamten Vereinzelungsbereich. Das Unterflurband 11 läuft dabei mit einer deutlich geringeren Geschwindigkeit als die Abzugsriemen der Vereinzelungsstufe 14 und besitzt zur auf ihm laufenden Sendungsunterkante einen relativ geringen Reibwert.
Bei den Abzugsschwingen 7a,7b handelt es sich um zwei übereinander angeordnete schwingfähige Arme, die unabhängig voneinander durch den Druck des Sendungsstapels 2 in ihre Arbeitsposition geschoben werden können.
Beim kontinuierlichen Betrieb üben die Abzugsschwingen 7a,7b einen permanenten Federdruck auf den zu vereinzelnden Sendungsstapel 2 aus.
Nicht vertikal an den Abzugsschwingen 7a,7b anstehende Sendungen bewirken eine unterschiedlich weite Auslenkung beider Abzugsschwingen 7a,7b. Durch die Auswertung der Abstandssensoren 8a,8b kann erfasst werden, wie stark und in welche Richtung die anstehenden Sendungen geneigt sind. Die Schräglage der abzuziehenden Sendungen wird über eine Differenzmessung der Abstandssensoren 8a,8b ermittelt. Ist die Schräglage unzulässig groß, wird der vordere Bereich des Sendungsstapels 2 über die Aufstelleinrichtung 9 korrigiert. Die sowohl vorwärts als auch rückwärts lauffähigen Friktionsriemen 6 der Aufstelleinrichtung 9 üben einen Druck oder eine Bremskraft auf die Unterkante des Sendungsstapels aus. Durch das Abziehen der vordersten Sendungen 16 verändert sich die Lage der Abzugschwingen 7a,7b in Richtung des Sendungsstapels 2.The speed of the pullout belts of the separation stage 14 is higher than that of the pullout belts of the take-off rockers 7a, 7b and the coupled second pullout belts 13. As soon as the foremost transport has reached the higher speed of the separation stage 14, the transport section of the extraction rockers 12 is stopped. The transmission speed is detected via a motion sensor 20, in which a scanning roller runs over the transmission and measures its speed. The foremost consignment is now safely caught by the transport belt of the separation stage 14. The transport effect of the trigger belt after the trigger arm 7a, 7b is supported by vacuum chambers 30,31.
By pulling out the first program against the following (stationary in the transport section 12) broadcasting current already created in the transition to the separation stage 14, a gap which is detected by a light barrier line 18. Once the desired distance to the subsequent shipment is reached, the transport section 12 can be restarted. The largest proportion of all gaps is generated with this device already at the transition from transport section 12 to the separation stage 14.
The underfloor belts 10 and 11 additionally support the transport of heavy shipments throughout the separation area. The underfloor belt 11 runs at a much lower speed than the pullout belt of the separation stage 14 and has a relatively low coefficient of friction for the lower edge of the shipment running on it.
The trigger arms 7a, 7b are two oscillatory arms arranged one above the other, which can be pushed independently of one another into their working position by the pressure of the mail stack 2.
During continuous operation, the pull-off rockers 7a, 7b exert a permanent spring pressure on the mailing stack 2 to be singled.
Not vertically to the trigger arms 7a, 7b pending transmissions cause a different amount of deflection of both trigger arms 7a, 7b. By evaluating the distance sensors 8a, 8b can be detected, how strong and in which direction the upcoming programs are inclined. The skew of the shipments to be deducted is determined by a differential measurement of the distance sensors 8a, 8b. If the skew is impermissibly large, the front area of the mailing stack 2 is corrected via the setting-up device 9. The friction belts 6 of the positioning device 9, which can run both forwards and backwards, exert a pressure or a braking force on the lower edge of the transport stack. By subtracting the foremost programs 16, the position of the trigger arms 7a, 7b changes in the direction of the mail stack 2.

Auch das Nachfördern des Sendungsstapels 2 durch die Unterflurriemen 3 und die Stapelstützen 5,5a wird über die Abstandssensoren 8a,8b gesteuert. Beim Abzug einer dicken Sendung 16 wird die entstandene Stapellücke durch die Schwingenbewegung aufgefangen. Die Zuführung des Sendungsstapels 2 kann somit mit weniger Dynamik erfolgen. Die daraus resultierenden Stapeldruckkräfte sind erheblich geringer.
Im Bereich des Unterflurbandes 10 ist ein Metallsensor 35 zur Detektion von Heftklammern angeordnet. Dieser Metallsensor 35 dient zur Identifikation von gehefteten Sendungen (z.B. offene Magazine). Da geheftete Sendungen besonders anfällig bzgl. Beschädigungen sind, wird nach der Detektion einer Heftklammer die Geschwindigkeiten der Abzugsriemen und die Beschleunigung am Übergang des Transportabschnittes 12 zur Vereinzelungsstufe 14 reduziert. Das bedeutet, dass nach der Detektion dieser kritischen Sendungsart die Vorrichtung automatisch solange in einen sendungsschonenderen Mode umschaltet, bis diese Sendung die Vorrichtung verlassen hat. Dies führt für diesen Sendungstyp zwar zu einer Durchsatzminderung, jedoch wird dadurch die maschinelle Verarbeitung von Sendungen ermöglicht, die bisher lediglich manuell zu verarbeiten waren.Also, the Nachfördern of the stack of mail 2 by the Unterflurriemen 3 and the stack supports 5,5a is controlled by the distance sensors 8a, 8b. When deducting a thick shipment 16, the resulting stacking gap is absorbed by the swinging motion. The supply of the mail stack 2 can thus be done with less dynamics. The resulting stacking forces are significantly lower.
In the region of the underfloor belt 10, a metal sensor 35 is arranged for the detection of staples. This metal sensor 35 serves to identify stapled items (eg open magazines). Since stapled items are particularly susceptible to damage, after the detection of a staple the speeds of the trigger belt and the acceleration at the transition of the transport section 12 to the separating stage 14 is reduced. This means that after the detection of this critical transmission mode, the device automatically switches as long as in a transmission-friendly mode until this program has left the device. Although this leads to a reduction in throughput for this type of shipment, it nevertheless makes possible the automated processing of shipments that were hitherto only to be processed manually.

Claims (8)

  1. Device for singulating vertically positioned flat mailings from a stack of mail (2),
    - comprising an input area (1) and a transport section (12) with a discharge rocker (7a or 7b),
    - wherein in the input area (1) the stack of mail (2), aligned in relation to a supporting element (4), stands on underfloor belts (3) and is held by at least one stack support (5,5a), and the underfloor belts (3) and the stack supports (5,5a) transport the stack of mail (2) to the transport section (12),
    - wherein the point of rotation of the discharge rockers (7a or 7b) is located at their downstream end and the discharge rocker is pressed by means of spring force against the stack of mail (2),
    - wherein a distance sensor (8a or 8b) is assigned to each discharge rocker (7a or 7b), said distance sensor emitting a drive start signal when there is a defined stack pressure on the respective discharge rocker (7a or 7b),
    - wherein the supporting element (4) ends at a defined distance upstream of the undeflected discharge rockers (7a or 7b),
    - and wherein the control of the drives of the transport section (12) is fashioned such that
    - at the defined stack pressure on the discharge rockers (7a or 7b) the drives of the transport section (12) are started,
    - the drives of the transport section (12) are stopped again or are reduced in speed as soon as a mailing held in a subsequent transport stage has their speed of travel,
    - and the drives of the transport section (12) are restarted or switched to their normal discharge speed when a gap before the subsequent mailing is detected by means of a light barrier line (18) disposed along the path of travel,
    characterised in that
    - at least one singulating stage connects to the transport section (12) downstream relative to the direction of travel of the mailings,
    - the transport section (12) comprises at least two discharge rockers (7a,7b) disposed on top of one another with discharge belts revolving in a driven manner, second discharge belts (13) revolving in a driven manner that are arranged in a fixed manner adjacent thereto and downstream thereof, as well as a driven underfloor belt (10) assigned to the discharge rockers (7a,7b) and to the second discharge belts (13),
    - a distance sensor (8a,8b) is assigned to each discharge rocker (7a,7b), said distance sensor emitting a drive start signal when there is a defined stack pressure on the respective discharge rocker (7a,7b),
    - the singulating stage (14) comprises further discharge belts revolving in a driven manner whose speed of travel is higher than the speed of travel of the second discharge belts (13)
    - a flexible, elongated retaining element (19) is disposed, said retaining element being arranged in a resiliently pressed manner from the end of the supporting element (4) to the beginning of the second discharge belts (13) and further on to said discharge belts (13) and to the discharge belts of the singulating stage (14),
    - the distance (12a) of the supporting element (4) from the downstream end of the second discharge belts (13) relative to the direction of travel is greater than the maximum permissible length of a mailing,
    - and the control of the drives of the transport section (12) and of the singulating stage (14) is fashioned such that
    - at the defined stack pressure on the discharge rockers (7a,7b) all the drives of the transport section (12) and of the singulating stage (14) are started, and
    - the drives of the transport section (12) are stopped again or are reduced in speed as soon as a mailing held by the discharge belts of the singulating stage (14) has their speed of travel.
  2. Device according to claim 1, characterised in that low-pressure chambers (30,31) are disposed behind the second discharge belts (13) and the discharge belts of the further singulating stages (14), said low-pressure chambers pulling the mailings on to the discharge belts during travel.
  3. Device according to claim 2, characterised in that the low pressure of the low-pressure chambers (30) of the second discharge belts (13) is less than the low pressure of the low-pressure chambers (31) of the singulating stage (14) located downstream.
  4. Device according to claim 1, characterised in that stationary scanning rollers or belts (20) running on the mailings are provided for determining the mailing speeds.
  5. Device according to claim 1, characterised in that an uprighting device (9) with controllably driven friction belts (6) is disposed between the underfloor belts (3) of the input area (1) and the underfloor belt (10) running along the path of travel, said friction belts being drivable such that, when a tilt in the leading part of the mailing stack (2) is identified by means of deflection of the discharge rockers (7a,7b), the leading part of the mailing stack (2) is uprighted.
  6. Device according to claim 1, characterised in that a metal sensor (35) for detecting staples is disposed at the transition between discharge rockers (7a,7b) and second discharge belts (13), said metal sensor (35) emitting, when a staple is detected, a signal to the drive control which responds thereto by reducing the discharge speeds and accelerations until the mailing with the staple has left the singulating device including all singulating stages (14).
  7. Device according to claim 1, characterised in that the speed of travel of the underfloor belt (10) is lower than that of the discharge belts of the discharge rockers (7a,7b).
  8. Device according to claim 1, characterised in that the point of rotation of the discharge rockers (7a,7b) is located at their downstream end on the drive axis.
EP04790890A 2003-10-30 2004-10-27 Device for singulating vertically positioned flat mailings from a stack of mail Expired - Lifetime EP1678065B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10350623A DE10350623B3 (en) 2003-10-30 2003-10-30 Mail item separation device has transport section between mail stack input region and at least one separation region with coordinated control of conveyor drives for transport stage and separation stage
PCT/EP2004/012111 WO2005042386A1 (en) 2003-10-30 2004-10-27 Device for singulating vertically positioned flat mailings from a stack of mail

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EP1678065A1 EP1678065A1 (en) 2006-07-12
EP1678065B1 true EP1678065B1 (en) 2008-10-01

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US (1) US7537207B2 (en)
EP (1) EP1678065B1 (en)
JP (1) JP2007533569A (en)
KR (1) KR20060112655A (en)
CN (1) CN100581952C (en)
DE (2) DE10350623B3 (en)
WO (1) WO2005042386A1 (en)

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CN1874944A (en) 2006-12-06
US20070252321A1 (en) 2007-11-01
DE10350623B3 (en) 2005-04-14
DE502004008173D1 (en) 2008-11-13
CN100581952C (en) 2010-01-20
JP2007533569A (en) 2007-11-22
KR20060112655A (en) 2006-11-01
WO2005042386A1 (en) 2005-05-12
EP1678065A1 (en) 2006-07-12
US7537207B2 (en) 2009-05-26

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