EP1379458B1 - Device for stacking flat, flexible objects - Google Patents

Device for stacking flat, flexible objects Download PDF

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Publication number
EP1379458B1
EP1379458B1 EP02761868A EP02761868A EP1379458B1 EP 1379458 B1 EP1379458 B1 EP 1379458B1 EP 02761868 A EP02761868 A EP 02761868A EP 02761868 A EP02761868 A EP 02761868A EP 1379458 B1 EP1379458 B1 EP 1379458B1
Authority
EP
European Patent Office
Prior art keywords
objects
stacking
deflection
transport
roller
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 - Fee Related
Application number
EP02761868A
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German (de)
French (fr)
Other versions
EP1379458A2 (en
Inventor
Dietmar Oexle
Rolf-Peter Skrdlant
Bernd Lindenmayer
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Siemens AG
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Siemens AG
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Publication date
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Publication of EP1379458A2 publication Critical patent/EP1379458A2/en
Application granted granted Critical
Publication of EP1379458B1 publication Critical patent/EP1379458B1/en
Anticipated expiration legal-status Critical
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H31/00Pile receivers
    • B65H31/04Pile receivers with movable end support arranged to recede as pile accumulates
    • B65H31/06Pile receivers with movable end support arranged to recede as pile accumulates the articles being piled on edge
    • 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
    • B65H2301/40Type of handling process
    • B65H2301/42Piling, depiling, handling piles
    • B65H2301/421Forming a pile
    • B65H2301/4214Forming a pile of articles on edge
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/10Size; Dimensions
    • B65H2511/11Length
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/20Location in space
    • B65H2511/22Distance
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/50Occurence
    • B65H2511/51Presence
    • B65H2511/514Particular portion of element
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2601/00Problem to be solved or advantage achieved
    • B65H2601/20Avoiding or preventing undesirable effects
    • B65H2601/25Damages to handled material
    • B65H2601/2525Collisions
    • 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
    • B65H2701/13Parts concerned of the handled material
    • B65H2701/131Edges
    • B65H2701/1311Edges leading edge
    • 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
    • B65H2701/13Parts concerned of the handled material
    • B65H2701/131Edges
    • B65H2701/1313Edges trailing edge
    • 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

Definitions

  • the invention relates to a device for stacking flat, flexible, on a narrow side standing objects in a stacking tray, where they are standing on a narrow side be stacked. They will be one by one fed, flat objects at an angle to a displaceable Investment wall on which they create their long sides, guided on their sides facing away from the plant wall longitudinal sides passed into the stacking tray, where they are using a stacking roller be stacked with their leading edges.
  • the flat objects to be stacked can relatively large differences in length, height and Have elasticity. Their transport takes place one behind the other with the shortest possible distances, preferably between elastic belt (shroud system) clamped. With the Do not stack the leading edges of the items on top of them The trailing edges of the leading objects hit and thereby It is necessary to trigger the trailing edges the leading objects out of the way of the leading edge the subsequent objects to bring, so-called “Clearing the bullet triangle".
  • baffles e.g. swiveling levers, Similar to switch wings, known (US Re. 34,330).
  • the deflection is as a countercurrent cross element executed, i. the tip shows in the undeflected state against the transport direction of the objects. Becomes The deflector did not retract before moving from the leading edge an object is reached, it comes to a frontal collision with the object, causing its destruction can lead.
  • the functionality is limited to certain object lengths limited. Too long broadcasts is the distance the object trailing edge to the force application point large. The objects deform due to their inertia, its trailing edge will not be out of the bullet triangle brought, and there is a risk of collision with the following item. With too short objects becomes the trailing edge of the force introducing functional element too short or not hit.
  • the invention is therefore based on the object, a generic Device for stacking flat, flexible, on a narrow side standing objects in a stacking tray to create a largely trouble-free stacking without a collision of the leading and trailing edges of successive Objects also with objects with a large one Length spectrum guaranteed.
  • each Stacking arranged deflecting elements for deflecting the in the direction of movement rear parts, determining the distances between objects, their lengths and their location too certain times and in evaluation of these values the Selection and by the timing of the deflection such that both short and long items then deflect the back parts of the objects are as soon as their front parts the area of the stacking roll have reached, a collision of the trailing edges with the leading edges of the subsequent objects even with objects avoided with different lengths.
  • the starting time of the deflection movement determine the determined respective baffles so that is a point of contact between the deflector and the object does not exceed a maximum distance from the trailing edge. This prevents that at very flexible, thin objects around the point of contact bend and the trailing edge approximately in the undeflected Situation remains.
  • the baffles as switch wings perform their wing ends in the undeflected state pointing in the transport direction of the objects (Mitstromweiche). This will cause a frontal collision of the objects avoided the switch wing, as it is in a wing of a Countercurrent switch is possible.
  • switch wing is designed so that the sides of the Fulcrum from diverge and that the wing end a Arc forms, so that when deflecting no free space between soft wing and leadership, so can an object rebounding from a stop wall is not get into a gap and get stuck.
  • a further advantageous embodiment is in the in the stacking tray leading transport path an elastic and / or elastically mounted transport roller arranged, the pushes the objects against the guide and in the direction of transport moved at transport speed.
  • the distance of Transport roller from the stop wall is shorter than the longest Objects so that these long items when they are be braked on the stop wall and the transport roller but be transported further, towards the plant wall / stack to be bent in the middle. Leave the Trailing then the transport roller, so is by the transport roller and the residual stress due to deflection of the rear Part of the long object thrown in the direction of the pile.
  • the stacking operations are in a schematic representation in a stacker for narrow broadcasts 1,2 as flat objects shown in plan view.
  • a Sorting machine are several such stackers behind each other.
  • the shipments 1,2 are in a main transport line sandwiched between belts of a shroud system transported one after the other along the stacking compartments. Should a specific shipment be based on its read recipient address sorted into a specific stack tray, so It is about upstream countercurrent 10 in the direction deflected the respective stacking tray.
  • each countercurrent switch 10 is a photocell 6, with the front and rear edges of the shipments 1,2 be detected.
  • the transport speed is known is, so that the lengths of the shipments, the distances between the shipments and the switching times of the switch wings determined in a control device, not shown become.
  • the countercurrent switch 10 After the countercurrent switch 10 are the discharged shipments 1,2 through an angle down to a transport roller 7 guided transport belt 15 of the main transport line and over pulleys 14 and a stacking roller 12 at the stacker entrance guided transport belt 13 in the direction of the stacking tray distracted.
  • the transport belt 15 As on the transport roller 7, the transport belt 15 be returned, the shipments are 1,2 to the pile role only by the conveyor belt 13 at one Guided led to the stacking roller 12.
  • the shipments 1,2 are braked on a stop wall 8.
  • the stop wall 8 For stack limitation in the region of the stacking roller 12 is on the stop wall 8 parallel to a plant wall 9 an additional Fixed boundary wall.
  • the shipments 1.2 are with their longitudinal sides on the plant wall 9 or at the already stacked Shipments 1,2. This parallel guided investment wall 9 is pressed by spring force in the direction of stacking roller 12.
  • the stacking roller 12 with a high coefficient of friction ensures that the shipments 1,2 safely against the frictional resistance of the plant wall 9 or already stacked
  • the pivot points are close behind the guide belt thirteenth placed and the ends of the switch wings 3,4 show in the Rest position in the direction of stacking roller 12.
  • the switch wing 3.4 is deflected in the time between reaching the area of the stack roll 12 by the mission 1 and hitting the leading edge the stop wall 8 the rear part of the respective shipment. 2 in the area between the trailing edge and a specified one Maximum distance from the trailing edge touched and deflected. is the distance of the point of contact from the trailing edge to big, so can be for particularly flexible shipments to these be bent around the point of contact without the trailing edges be significantly deflected. So that would be nevertheless the danger of the collision of the front and Trailing edges.
  • the "longest" shipments will clear the bullet triangle additionally by a rotating transport roller 7, designed as a foam roller, supported.
  • the axis of Foam roller is located at the point where the shipments be released from the shrouds and is positioned so that a "longest" broadcast 2D with its rear part just caught between the shrouds when they are reaches the stop wall 8 with its front edge.
  • the broadcast 2D can not move further towards the stop wall 8, if it is deformed, i. it bulges and is thereby submerged Tension. This will make their trailing edge against the rotating Foam roll pressed. Due to the high coefficient of friction of Foam roller adheres to the shipment trailing edge at this and will by their rotating movement in the direction of the mail stack 5 hurled, thus making the bullet triangle free (FIG 4).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pile Receivers (AREA)
  • Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)

Abstract

The invention relates to a device for stacking flat, flexible objects situated on a narrow edge, successively in a stacking compartment. The aim of the invention is to avoid the rear edges colliding with the front edges of the next objects, even when the objects have different lengths. To this end, a plurality of deviation elements (3, 4) are used, said elements being successively arranged in the direction of each stacking compartment, in order to deviate the rear parts of the objects (2) seen in the displacement direction; the distances between the objects (2), the length thereof and the position thereof at certain points in time are determined; and, based on said values, the deviation elements (3,4) are temporally controlled in such a way that, for both short and long objects (2), the rear parts of the objects (2) are deviated in relation to the rear edge inside a maximum distance.

Description

Die Erfindung betrifft eine Vorrichtung zum Einstapeln flacher, biegsamer, auf einer Schmalseite stehender Gegenstände in ein Stapelfach, in dem sie auf einer Schmalseite stehend eingestapelt werden. Dabei werden die nacheinander einzeln zugeführten, flachen Gegenstände schräg zu einer verschiebbaren Anlagewand, an der sie sich mit ihren Längsseiten anlegen, an ihren der Anlagewand abgewandten Längsseiten geführt in das Stapelfach geleitet, wo sie mit Hilfe einer Stapelrolle mit ihren Vorderkanten eingestapelt werden.The invention relates to a device for stacking flat, flexible, on a narrow side standing objects in a stacking tray, where they are standing on a narrow side be stacked. They will be one by one fed, flat objects at an angle to a displaceable Investment wall on which they create their long sides, guided on their sides facing away from the plant wall longitudinal sides passed into the stacking tray, where they are using a stacking roller be stacked with their leading edges.

Die einzustapelnden flachen Gegenstände, z.B. Sendungen, können relativ große Unterschiede hinsichtlich Länge, Höhe und Elastizität aufweisen. Ihr Transport erfolgt hintereinander mit möglichst geringen Abständen, vorzugsweise zwischen elastischen Riemen (Deckbandsystem) eingeklemmt. Damit beim Einstapeln die Vorderkanten der Gegenstände nicht auf die Hinterkanten der vorauslaufenden Gegenstände stoßen und dadurch Verklemmungen auslösen, ist es notwendig, die Hinterkanten der vorauslaufenden Gegenstände aus dem Weg der Vorderkante der nachfolgenden Gegenstände zu bringen, sogenanntes "Freimachen des Einschussdreiecks".The flat objects to be stacked, e.g. Shipments, can relatively large differences in length, height and Have elasticity. Their transport takes place one behind the other with the shortest possible distances, preferably between elastic belt (shroud system) clamped. With the Do not stack the leading edges of the items on top of them The trailing edges of the leading objects hit and thereby It is necessary to trigger the trailing edges the leading objects out of the way of the leading edge the subsequent objects to bring, so-called "Clearing the bullet triangle".

Um dies zu erreichen, wurde in der DE 3 317 865 A1 eine angetriebene Stapelspindel beschrieben, die sich dicht vor jedem Stapelfach befindet und die Gegenstände in Steigungsrichtung zum Stapel hin ablenkt, so dass die nachfolgenden Gegenstände nicht auf die Hinterkanten, sondern seitlich auf die schon eingestapelten Gegenstände stoßen. Die Krafteinleitung erfolgt an der Unterkante der Gegenstände. Dies hat aber zur Folge, dass insbesondere hohe Gegenstände infolge der Massenträgheit verdrillt werden, d.h. die obere hintere Ecke gibt das "Einschussdreieck" zu spät oder gar nicht frei. To achieve this, in DE 3 317 865 A1 a driven Stacking spindle described, which is close to each Stacking tray is located and the objects in the slope direction deflects towards the stack, leaving the following items not on the trailing edges, but on the side of the already pile up stacked objects. The force is applied at the lower edge of the objects. But this has to Result that especially high objects due to inertia twisted, i. the upper rear corner gives the "bullet triangle" too late or not at all free.

Es sind auch andere Ablenkelemente, z.B. schwenkbare Hebel, ähnlich wie Weichenflügel, bekannt geworden (US Re. 34,330). Hierbei ist das Ablenkelement als Gegenstromweichenelement ausgeführt, d.h. die Spitze zeigt im nicht ausgelenkten Zustand entgegen der Transportrichtung der Gegenstände. Wird das Ablenkelement nicht eingefahren, bevor es von der Vorderkante eines Gegenstandes erreicht wird, kommt es zu einer frontalen Kollision mit dem Gegenstand, was zu dessen Zerstörung führen kann.There are also other baffles, e.g. swiveling levers, Similar to switch wings, known (US Re. 34,330). Here, the deflection is as a countercurrent cross element executed, i. the tip shows in the undeflected state against the transport direction of the objects. Becomes The deflector did not retract before moving from the leading edge an object is reached, it comes to a frontal collision with the object, causing its destruction can lead.

Bei diesen bekannten Lösungen liegt der Krafteinleitungspunkt jeweils an einer festgelegten Stelle.In these known solutions is the force application point each at a specified location.

Hierdurch ist die Funktionsfähigkeit auf bestimmte Gegenstandslängen beschränkt. Bei zu langen Sendungen ist der Abstand der Gegenstandshinterkante zum Krafteinleitungspunkt zu groß. Die Gegenstände verformen sich bedingt durch ihre Massenträgheit, ihre Hinterkante wird nicht aus dem Einschussdreieck gebracht, und es besteht die Gefahr einer Kollision mit dem nachfolgenden Gegenstand. Bei zu kurzen Gegenständen wird die Hinterkante von dem Kraft einleitenden Funktionselement zu kurz oder gar nicht getroffen.As a result, the functionality is limited to certain object lengths limited. Too long broadcasts is the distance the object trailing edge to the force application point large. The objects deform due to their inertia, its trailing edge will not be out of the bullet triangle brought, and there is a risk of collision with the following item. With too short objects becomes the trailing edge of the force introducing functional element too short or not hit.

Der Erfindung liegt daher die Aufgabe zugrunde, eine gattungsgemäße Vorrichtung zum Einstapeln flacher, biegsamer, auf einer Schmalseite stehender Gegenstände in ein Stapelfach zu schaffen, die ein weitgehend störungsfreies Einstapeln ohne ein Zusammenstoßen der Hinter- und Vorderkanten aufeinanderfolgender Gegenstände auch bei Gegenständen mit einem großem Längenspektrum gewährleistet.The invention is therefore based on the object, a generic Device for stacking flat, flexible, on a narrow side standing objects in a stacking tray to create a largely trouble-free stacking without a collision of the leading and trailing edges of successive Objects also with objects with a large one Length spectrum guaranteed.

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

Durch den Einsatz mehrerer, hintereinander auf dem Weg in jedes Stapelfach angeordneter Ablenkelemente zum Ablenken der in Bewegungsrichtung hinteren Teile, das Ermitteln der Abstände zwischen Gegenständen, deren Längen und ihrer Lage zu bestimmten Zeitpunkten und in Auswertung dieser Werte die Auswahl und durch die zeitliche Ansteuerung der Ablenkelemente derart, dass sowohl bei kurzen als auch bei langen Gegenständen die hinteren Teile der Gegenstände dann ablenkbar sind, sobald deren Vorderteile den Bereich der Stapelrolle erreicht haben, wird ein Zusammenstoßen der Hinterkanten mit den Vorderkanten der nachfolgenden Gegenstände auch bei Gegenständen mit unterschiedlichen Längen vermieden.By using several, one after the other on the way to each Stacking arranged deflecting elements for deflecting the in the direction of movement rear parts, determining the distances between objects, their lengths and their location too certain times and in evaluation of these values the Selection and by the timing of the deflection such that both short and long items then deflect the back parts of the objects are as soon as their front parts the area of the stacking roll have reached, a collision of the trailing edges with the leading edges of the subsequent objects even with objects avoided with different lengths.

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

So ist es vorteilhaft, den Startzeitpunkt der Ablenkbewegung des/der ermittelten jeweiligen Ablenkelemente so festzulegen, dass ein Berührungspunkt zwischen Ablenkelement und Gegenstand einen Maximalabstand von der Hinterkante nicht überschreitet. Damit wird verhindert, dass bei sehr biegsamen, dünnen Gegenständen diese sich um den Berührungspunkt herum durchbiegen und die Hinterkante annähernd in der unausgelenkten Lage verbleibt.So it is advantageous, the starting time of the deflection movement determine the determined respective baffles so that is a point of contact between the deflector and the object does not exceed a maximum distance from the trailing edge. This prevents that at very flexible, thin objects around the point of contact bend and the trailing edge approximately in the undeflected Situation remains.

Vorteilhaft ist es auch, die Ablenkelemente als Weichenflügel auszuführen, deren Flügelenden im nicht ausgelenkten Zustand in Transportrichtung der Gegenstände zeigen (Mitstromweiche). Dadurch wird ein frontales Zusammenstoßen der Gegenstände mit dem Weichenflügel vermieden, wie es bei einem Flügel einer Gegenstromweiche möglich ist.It is also advantageous, the baffles as switch wings perform their wing ends in the undeflected state pointing in the transport direction of the objects (Mitstromweiche). This will cause a frontal collision of the objects avoided the switch wing, as it is in a wing of a Countercurrent switch is possible.

Wird der Weichenflügel so ausgeführt, dass die Seiten vom Drehpunkt aus auseinanderlaufen und dass das Flügelende einen Kreisbogen bildet, so dass beim Auslenken kein freier Zwischenraum zwischen Weichenflügel und Führung besteht, so kann ein von einer Anschlagwand zurückprallender Gegenstand nicht in einen Zwischenraum geraten und verklemmen. If the switch wing is designed so that the sides of the Fulcrum from diverge and that the wing end a Arc forms, so that when deflecting no free space between soft wing and leadership, so can an object rebounding from a stop wall is not get into a gap and get stuck.

In einer weiteren vorteilhaften Ausgestaltung ist in dem in das Stapelfach führenden Transportpfad eine elastische und/oder elastisch befestigte Transportrolle angeordnet, die die Gegenstände gegen die Führung drückt und in Transportrichtung mit Transportgeschwindigkeit bewegt. Der Abstand der Transportrolle von der Anschlagwand ist kürzer als die längsten Gegenstände, so dass diese langen Gegenstände, wenn sie an der Anschlagwand abgebremst werden und von der Transportrolle aber weitertransportiert werden, in Richtung Anlagewand/Stapel in der Mitte durchgebogen werden. Verlässt die Hinterkante dann die Transportrolle, so wird durch die Transportrolle und die Eigenspannung infolge Durchbiegung der hintere Teil des langen Gegenstandes in Richtung Stapel geschleudert.In a further advantageous embodiment is in the in the stacking tray leading transport path an elastic and / or elastically mounted transport roller arranged, the pushes the objects against the guide and in the direction of transport moved at transport speed. The distance of Transport roller from the stop wall is shorter than the longest Objects so that these long items when they are be braked on the stop wall and the transport roller but be transported further, towards the plant wall / stack to be bent in the middle. Leave the Trailing then the transport roller, so is by the transport roller and the residual stress due to deflection of the rear Part of the long object thrown in the direction of the pile.

Damit keine ungewollten Berührungen der Ablenkelemente mit den nachfolgenden Gegenständen auftreten, sind Zeitpunkt und -dauer der Auslenkungen der Ablenkelemente so festgelegt, dass die Ablenkelemente wieder ihre Nulllage erreicht haben, wenn die jeweils nachfolgenden Gegenstände in den Bereich der Ablenkelemente gelangen.So that no unwanted contact with the baffles the following items occur, are time and duration of deflections of the deflector elements so determined that the deflecting elements have reached their zero position again, if the respective subsequent objects in the range of Get deflecting.

Wird längere Zeit kein Gegenstand eingestapelt, d.h. gelangen keine Gegenstände in den Bereich der Ablenkelemente, so ist es vorteilhaft, die Ablenkelemente in dieser Zeit im ausgelenkten Zustand zu belassen, um ein Zurückbewegen der hinteren Teile der eingestapelten Gegenstände durch Gewichtskräfte oder Eigenspannungen in das "Einschussdreieck" zu verhindern.If no item is being stacked for a long time, i. reach no objects in the area of the baffles, so is it is advantageous to deflect the deflecting elements during this time Leave condition to move back the rear Parts of the stacked objects by weight forces or to prevent residual stresses in the "bullet triangle".

Anschließend wird die Erfindung anhand der Zeichnung in einem Ausführungsbeispiel näher erläutert.Subsequently, the invention with reference to the drawing in a Embodiment explained in more detail.

Dabei zeigen

FIG 1
eine Draufsicht einer Einstapelstelle eines Stapelfaches mit einer kurzen eingestapelten Sendung und einer folgenden nächsten Sendung.
FIG 2
eine Draufsicht einer Einstapelstelle mit einer einzustapelnden Sendung, deren hinterer Teil im Wirkungsbereich eines in Transportrichtung hinteren Weichenflügels liegt.
FIG 3
eine Draufsicht einer Einstapelstelle mit einer einzustapelnden Sendung, deren hinterer Teil im Wirkungsbereich eines in Transportrichtung vorderen Weichenflügels liegt.
FIG 4
eine Draufsicht einer Einstapelstelle mit einer einzustapelnden langen Sendung, deren hinterer Teil im Wirkungsbereich einer Transportrolle liegt.
Show
FIG. 1
a plan view of a stacking point of a stacking tray with a short stacked mail and a subsequent next broadcast.
FIG. 2
a top view of a stacking point with a einzustapelnden consignment, the rear part is in the range of action in the transport direction rear switch wing.
FIG. 3
a plan view of a stacking point with a einzustapelnden consignment, the rear part is in the range of action of a front sweeper wing in the transport direction.
FIG. 4
a plan view of a stacking point with a einzustapelnden long consignment, the rear part is in the range of action of a transport roller.

In den Figuren sind in schematischer Darstellung die Einstapelvorgänge in ein Stapelfach für schmale Sendungen 1,2 als flache Gegenstände in der Draufsicht dargestellt. In einer Sortiermaschine befinden sich mehrere solcher Stapelfächer hintereinander. Die Sendungen 1,2 werden in einem Haupttransportstrang zwischen Riemen eines Deckbandsystems eingeklemmt hintereinander an den Stapelfächern entlang transportiert. Soll eine bestimmte Sendung aufgrund ihrer gelesenen Empfängeradresse in ein bestimmtes Stapelfach sortiert werden, so wird sie über vorgelagerte Gegenstromweichen 10 in Richtung des jeweiligen Stapelfaches abgelenkt.In the figures, the stacking operations are in a schematic representation in a stacker for narrow broadcasts 1,2 as flat objects shown in plan view. In a Sorting machine are several such stackers behind each other. The shipments 1,2 are in a main transport line sandwiched between belts of a shroud system transported one after the other along the stacking compartments. Should a specific shipment be based on its read recipient address sorted into a specific stack tray, so It is about upstream countercurrent 10 in the direction deflected the respective stacking tray.

Dies geschieht, in dem die Gegenstromweichenflügel 11 in den Haupttransportstrang geschwenkt werden und so die Sendungen 1,2 schräg nach unten ablenkt. Die die Sendungen 1,2 führenden Riemen sind schmal ausgeführt, so dass über- und unterhalb der Riemen die Weichenflügel in die Transportbahnen schwenken können.This happens in which the countercurrent vanes 11 in the Main transport line to be panned and so the shipments 1,2 deflects diagonally downwards. The leading the consignments 1.2 Belts are made narrow so that over and under the belt the switch wings in the transport lanes can swing.

Vor jeder Gegenstromweiche 10 befindet sich eine Lichtschranke 6, mit der die Vorder- und Hinterkanten der Sendungen 1,2 detektiert werden. Da die Transportgeschwindigkeit bekannt ist, können damit die Längen der Sendungen, die Abstände zwischen den Sendungen und die Schaltzeitpunkte der Weichenflügel in einer nicht dargestellten Steuereinrichtung ermittelt werden.Before each countercurrent switch 10 is a photocell 6, with the front and rear edges of the shipments 1,2 be detected. As the transport speed is known is, so that the lengths of the shipments, the distances between the shipments and the switching times of the switch wings determined in a control device, not shown become.

Nach der Gegenstromweiche 10 werden die ausgeschleusten Sendungen 1,2 durch schräg nach unten bis zu einer Transportrolle 7 geführte Transportriemen 15 des Haupttransportstranges und über Umlenkrollen 14 und eine Stapelrolle 12 am Stapelfacheingang geführten Transportriemen 13 in Richtung Stapelfach abgelenkt. Da an der Transportrolle 7 die Transportriemen 15 wieder zurückgeführt werden, werden die Sendungen 1,2 bis zur Stapelrolle nur durch die Transportriemen 13 an einer Seite geführt an die Stapelrolle 12 geleitet. Die Sendungen 1,2 werden an einer Anschlagwand 8 abgebremst. Zur Stapelbegrenzung im Bereich der Stapelrolle 12 ist an der Anschlagwand 8 parallel zu einer Anlagewand 9 eine zusätzliche Begrenzungswand befestigt. Die Sendungen 1,2 legen sich mit ihren Längsseiten an der Anlagewand 9 bzw. an den schon eingestapelten Sendungen 1,2 an. Diese parallel geführte Anlagewand 9 wird mit Federkraft in Richtung Stapelrolle 12 gedrückt. Die Stapelrolle 12 mit einem hohen Reibungskoeffizienten gewährleistet, dass die Sendungen 1,2 sicher gegen den Reibungswiderstand der Anlagewand 9 bzw. der schon eingestapelten Sendungen 1,2 gefördert werden.After the countercurrent switch 10 are the discharged shipments 1,2 through an angle down to a transport roller 7 guided transport belt 15 of the main transport line and over pulleys 14 and a stacking roller 12 at the stacker entrance guided transport belt 13 in the direction of the stacking tray distracted. As on the transport roller 7, the transport belt 15 be returned, the shipments are 1,2 to the pile role only by the conveyor belt 13 at one Guided led to the stacking roller 12. The shipments 1,2 are braked on a stop wall 8. For stack limitation in the region of the stacking roller 12 is on the stop wall 8 parallel to a plant wall 9 an additional Fixed boundary wall. The shipments 1.2 are with their longitudinal sides on the plant wall 9 or at the already stacked Shipments 1,2. This parallel guided investment wall 9 is pressed by spring force in the direction of stacking roller 12. The stacking roller 12 with a high coefficient of friction ensures that the shipments 1,2 safely against the frictional resistance of the plant wall 9 or already stacked Shipments 1.2 are encouraged.

Durch den beim Abstapeln ausgeübten Druck auf die federnd gelagerte Anlagewand 9 bewegt sie sich mit wachsendem Stapel 5 von der Stapelrolle 12 weg.By the pressure exerted on the spring-loaded when stacking Investment wall 9 moves with increasing stack. 5 away from the stacking roll 12.

Die Sendungen 1,2 treffen mit ihren Vorderkanten schräg auf die Längsseiten der schon eingestapelten, entlang der Anlagewand 9 ausgerichteten eingestapelten Sendungen. Bei kurzen Abständen zwischen den Sendungen 1,2 und kurzen Sendungen 1,2 ist dies gewährleistet, da der kurze Überhang nach der Stapelrolle 12 aufgrund der Elastizität/Eigensteifigkeit der Sendungen so schnell in die zur Anlagewand 9 parallele Lage kommt, dass ein Zusammenstoßen der Vorderkanten der nachfolgenden Sendungen 1 mit den Hinterkanten der schon eingestapelten kurzen Sendungen 2A vermieden wird (FIG 1). Bei längeren Sendungen und kurzen Lücken reicht die Zeit des Ausrichtens auf der Basis der Eigensteifigkeit nicht mehr aus, das sogenannte Einschussdreieck freizumachen, so dass Vorder- und Hinterkanten zusammenstoßen würden. Deshalb sind auf dem Weg ins Stapelfach mehrere Weichenflügel 3,4 hintereinander als Ablenkelemente angeordnet.The shipments 1,2 hit with their leading edges at an angle the long sides of the already stacked, along the investment wall 9 aligned stacked shipments. In short Intervals between shipments 1,2 and short shipments 1,2 This is ensured because of the short overhang after the stacking roll 12 due to the elasticity / inherent rigidity of Shipments so quickly in the investment wall 9 parallel position comes that a collision of the leading edges of the following Shipments 1 with the trailing edges of already stacked short broadcasts 2A is avoided (FIG 1). For longer Shipments and short gaps ranges the time of alignment based on the inherent rigidity no longer off, the so-called bullet triangle free, so that front and Trailing edges would collide. That's why we're on our way in the stacker a plurality of Weichenflügel 3,4 successively as Bending arranged.

Die Schwenkpunkte sind dicht hinter den Führungsriemen 13 platziert und die Enden der Weichenflügel 3,4 zeigen in der Ruheposition in Richtung Stapelrolle 12.The pivot points are close behind the guide belt thirteenth placed and the ends of the switch wings 3,4 show in the Rest position in the direction of stacking roller 12.

Damit die längeren Überstände nach der Stapelrolle 12 der längeren Sendungen 2 rechtzeitig den Transportpfad in das Stapelfach für die nachfolgenden Sendungen 1 freimachen, werden die entsprechenden Weichenflügel 3,4 als Ablenkelemente kurzzeitig in den Transportpfad ausgelenkt und drücken dadurch die hinteren Teile der Sendungen in Richtung Stapel 5. Dabei wird jeweils der Weichenflügel 3,4 ausgelenkt, der in dem Zeitraum zwischen Erreichen des Bereiches der Stapelrolle 12 durch die Sendung 1 und Auftreffen der Vorderkante an der Anschlagwand 8 den hinteren Teil der jeweiligen Sendung 2 in dem Bereich zwischen Hinterkante und einem festgelegten Maximalabstand von der Hinterkante berührt und ablenkt. Ist der Abstand des Berührungspunktes von der Hinterkante zu groß, so können bei besonders biegsamen Sendungen diese um den Berührungspunkt herum gebogen werden, ohne dass die Hinterkanten nennenswert ausgelenkt werden. Damit bestände also trotzdem die Gefahr des Aufeinanderprallens der Vorder- und Hinterkanten.Thus, the longer supernatants after the stacking roller 12 of the longer shipments 2 in time the transport path in the Unpack the stacker tray for the following programs 1 the corresponding switch wings 3,4 as baffles momentarily deflected into the transport path and thereby press the back parts of the mail items in the direction of stack 5. In each case, the switch wing 3.4 is deflected in the time between reaching the area of the stack roll 12 by the mission 1 and hitting the leading edge the stop wall 8 the rear part of the respective shipment. 2 in the area between the trailing edge and a specified one Maximum distance from the trailing edge touched and deflected. is the distance of the point of contact from the trailing edge to big, so can be for particularly flexible shipments to these be bent around the point of contact without the trailing edges be significantly deflected. So that would be nevertheless the danger of the collision of the front and Trailing edges.

Auf der Basis der Lichtschrankenmessergebnisse und deren Auswertung wird bei Sendungen 2B, die kürzer sind als der Abstand zwischen Anschlagwand und Berührungspunkt mit dem ausgelenkten, der Stapelrolle am nächsten befindlichen Weichenflügel 4 zuzüglich des maximal zulässigen Abstandes zur Hinterkante aber nicht kürzer sind als der Abstand zwischen dem Berührungspunkt der Sendung mit der Stapelrolle und diesem Weichenflügel 4, dieser Weichenflügel 4 aktiviert (FIG 2).Based on the photocell measurement results and their evaluation will ship 2B, which are shorter than the distance between stop wall and point of contact with the deflected, the stacking roll closest to the switch wing 4 plus the maximum permissible distance to the trailing edge but not shorter than the distance between the Touch point of the consignment with the stacking roller and this Weichenflügel 4, this switch wing 4 activated (FIG 2).

Sind die Sendungen 2C, die gerade eingestapelt werden, nicht länger als der Abstand zwischen Anschlagwand 8 und Berührungspunkt mit dem der Transportrolle 7 am nächsten befindlichen Weichenflügel 3 zuzüglich des maximal zulässigen Abstandes der Hinterkante zu dem Berührungspunkt mit diesem Weichenflügel 3 und nicht kürzer als der Abstand zwischen dem Berührungspunkt mit der Stapelrolle und den Berührungspunkt mit dem Weichenflügel 3, so wird dieser Weichenflügel 3 aktiviert (FIG 3).Are the shipments 2C being stacked up not longer than the distance between the stop wall 8 and touch point with the transport roller 7 closest Switch wing 3 plus the maximum permissible distance the trailing edge to the point of contact with this switch wing 3 and not shorter than the distance between the Contact point with the stacking roller and the point of contact with the switch wing 3, this switch wing 3 is activated (FIG 3).

Bei Sendungen mit kritischen Zwischenlängen, d.h. mit Längen, die in einem Bereich unterhalb der Längen sind, ab denen nur der der Transportrolle 7 am nächsten befindliche Weichenflügel 3 aktiviert wird, ist es vorteilhaft, sobald die Sendung den Bereich der Stapelrolle 12 erreicht hat, zuerst den Weichenflügel 3 und dann den Weichenflügel 4 auszulenken.For programs with critical intermediate lengths, i. with lengths, which are in an area below the lengths from which only the transfer roller 7 closest to the switch wing 3 is activated, it is advantageous once the shipment has reached the area of the stacking roller 12, first the switch wing 3 and then deflect the switch wing 4.

Bei den "längsten" Sendungen wird das Freimachen des Einschussdreiecks zusätzlich durch eine rotierende Transportrolle 7, ausgeführt als Schaumrolle, unterstützt. Die Achse der Schaumrolle befindet sich an der Stelle, an der die Sendungen von den Deckbändern freigegeben werden und ist so positioniert, dass eine "längste" Sendung 2D mit ihrem hinteren Teil gerade noch zwischen den Deckbändern gefasst ist, wenn sie mit ihrer Vorderkante die Anschlagwand 8 erreicht. Somit erfährt die Sendung 2D auch nach dem Erreichen der Anschlagwand weiterhin eine Kraft in Transportrichtung. Weil sich die Sendung 2D nicht weiter in Richtung Anschlagwand 8 bewegen kann, wird sie verformt, d.h. sie wölbt sich und steht dadurch unter Spannung. Dadurch wird ihre Hinterkante gegen die rotierende Schaumrolle gepresst. Durch den hohen Reibwert der Schaumrolle haftet die Sendungshinterkante an dieser und wird durch deren rotierende Bewegung in Richtung Sendungsstapel 5 geschleudert, macht also das Einschussdreieck frei (FIG 4).The "longest" shipments will clear the bullet triangle additionally by a rotating transport roller 7, designed as a foam roller, supported. The axis of Foam roller is located at the point where the shipments be released from the shrouds and is positioned so that a "longest" broadcast 2D with its rear part just caught between the shrouds when they are reaches the stop wall 8 with its front edge. Thus learns the program 2D also after reaching the stop wall still a force in the transport direction. Because the broadcast 2D can not move further towards the stop wall 8, if it is deformed, i. it bulges and is thereby submerged Tension. This will make their trailing edge against the rotating Foam roll pressed. Due to the high coefficient of friction of Foam roller adheres to the shipment trailing edge at this and will by their rotating movement in the direction of the mail stack 5 hurled, thus making the bullet triangle free (FIG 4).

Claims (7)

  1. Device for stacking flat flexible objects standing on a narrow side in a stacking compartment, in which they are also stacked standing on a narrow side, in which the objects (1, 2) supplied individually one after another are led obliquely in relation to a displaceable contact wall (9), against which they are placed with their long sides, guided on their long sides facing away from the contact wall (9), into the stacking compartment, where they are conveyed as far as a stop wall (8) with the aid of a stacking roller (12), characterized in that, at the side on the path of the objects (1, 2) into the stacking compartment, there are arranged at least two deflection elements for deflecting the rear parts of the objects (1, 2) in the direction of movement in the direction of the contact wall (9), in that sensors are provided for registering the leading and trailing edges of the objects (1, 2) transported at a predefined speed, and evaluation means for determining the length of each object (1, 2), the distances between the objects (1, 2) and their positions at specific times, in that control means are provided for activating the drives of the deflection elements independently of one another as a function of the lengths of the objects (1, 2) and their time-variable positions in such a way that the rear region in the direction of movement of each object (2), at the earliest at the time when its front part has arrived in the region of the stacking roller (12) or later, within a fixed maximum distance from the trailing edge, is deflected in the direction of the contact wall (9), so that the following object (1) cannot strike the trailing edge of the preceding object (2).
  2. Device according to Claim 1, characterized in that the respective starting time of the deflection movement of the respective deflection element(s) determined for deflection in accordance with the measured length of the object (2) after the leading edge has been gripped by the stacking roller (12) is defined in such a way that a point of contact between deflection element and object (2) does not exceed a maximum distance from the trailing edge.
  3. Device according to Claim 1, characterized in that the deflection elements provided are diverter wings (3, 4), whose wing ends point in the transport direction of the objects (1, 2) when they are not deflected.
  4. Device according to Claim 3, characterized in that the sides of the diverter wings (3, 4) run away from each other from the pivot and the wing end forms a circular arc which is so large that there is no free interspace between diverter wing (3, 4) and guide during deflection, into which an object (2) bouncing back can get.
  5. Device according to Claim 1, characterized in that in the transport path leading into the stacking compartment there is arranged an elastic and/or elastically fixed transport roller (7), which presses the objects (1, 2) against the guide and moves them in the transport direction at the transport speed, the distance to the braking stop wall (8) being only so much shorter than the longest objects (1, 2) that the longest objects, after they reach the stop wall (8) between the stacking roller (12) and the transport roller (7), are bent in the direction of the contact wall (9) or stack (5) and, by using their inherent stress, the rear parts of the objects (2) are deflected in the direction of the contact wall (9).
  6. Device according to Claim 1, characterized in that the time and duration of the deflections of the deflection elements are defined such that the deflection elements have reached their zero position again when the respectively following objects (1) arrive in the region of the deflection elements.
  7. Device according to Claim 6, characterized in that the deflection elements are left in the deflected state for a relatively long time if no object (1, 2) arrives in their region during this time.
EP02761868A 2001-04-17 2002-04-11 Device for stacking flat, flexible objects Expired - Fee Related EP1379458B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10118758 2001-04-17
DE10118758A DE10118758C1 (en) 2001-04-17 2001-04-17 Stacking device, for flat flexible objects, has at least two diverting elements at side of track of object
PCT/DE2002/001324 WO2002083534A2 (en) 2001-04-17 2002-04-11 Device for stacking flat, flexible objects

Publications (2)

Publication Number Publication Date
EP1379458A2 EP1379458A2 (en) 2004-01-14
EP1379458B1 true EP1379458B1 (en) 2005-10-12

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EP02761868A Expired - Fee Related EP1379458B1 (en) 2001-04-17 2002-04-11 Device for stacking flat, flexible objects

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US (1) US6776407B2 (en)
EP (1) EP1379458B1 (en)
JP (1) JP2004518597A (en)
DE (2) DE10118758C1 (en)
WO (1) WO2002083534A2 (en)

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Also Published As

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WO2002083534A3 (en) 2003-01-09
WO2002083534A2 (en) 2002-10-24
DE10118758C1 (en) 2002-05-23
EP1379458A2 (en) 2004-01-14
US6776407B2 (en) 2004-08-17
JP2004518597A (en) 2004-06-24
US20040084836A1 (en) 2004-05-06
DE50204533D1 (en) 2005-11-17

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