EP2253390A1 - Procédé et dispositif destiné au tri d'objets postaux - Google Patents

Procédé et dispositif destiné au tri d'objets postaux Download PDF

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Publication number
EP2253390A1
EP2253390A1 EP10160254A EP10160254A EP2253390A1 EP 2253390 A1 EP2253390 A1 EP 2253390A1 EP 10160254 A EP10160254 A EP 10160254A EP 10160254 A EP10160254 A EP 10160254A EP 2253390 A1 EP2253390 A1 EP 2253390A1
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EP
European Patent Office
Prior art keywords
sequence
separating element
subsequence
pair
separating
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.)
Withdrawn
Application number
EP10160254A
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German (de)
English (en)
Inventor
Armin Zimmermann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
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Siemens AG
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Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP2253390A1 publication Critical patent/EP2253390A1/fr
Withdrawn legal-status Critical Current

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    • 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

Definitions

  • the invention relates to a method and a device for sorting various types of objects, in particular flat postal items, according to a predetermined feature.
  • a method having the features of the preamble of claim 1 and an apparatus having the features of the preamble of claim 1 are made DE 10 2006 029 723 B3 known.
  • EP 1093402 B1 For example, a method and apparatus for merging multiple stacks of mail into a total stack is described.
  • the mailpieces of each stack have already been sorted according to the destination information on the mailpieces and a predetermined order under destination points before merging.
  • the total stack is formed by depositing the mailpieces on a transport line according to a certain procedure.
  • the device has three separating elements ("plates 35, 36, 37"). These separating elements 35, 36, 37 can be linearly reciprocated. In an engaged position, a separator engages from the side into a stack of mailpieces. This stack consists of mail that stands upright on a base. Of the Stack can be moved past a separator in a release position. The device spends a partial stack of this stack in a container that stands under the pad. The partial stack falls through an opening, which is opened at the right time, from above into the container. For this purpose, a partial element moves into the stack and thereby generates a partial stack.
  • This separating element is moved toward a second separating element, so that these two separating elements define the partial stack and compress it between them and, by their movement, pass the partial stack over the opening.
  • Two door leaves in the opening are opened for a short time, so that the partial stack can fall down.
  • the invention has for its object to provide a method having the features of the preamble of claim 1 and an apparatus having the features of the preamble of claim 8, by which it is avoided that a flat object is damaged during insertion.
  • the method according to the solution and the device according to the invention are designed to sort objects according to a predetermined characteristic.
  • the characteristic to be sorted is specified.
  • the range of values of this feature includes discrete values or is decomposed into discrete values. Among these possible values of the sorting feature, a feature value order is given.
  • an insertion step is performed repeatedly.
  • the handling machine inserts at least one object into a sequence.
  • the handling machine inserts the object into the sequence in such a way that a subsequence of the sequence whose objects all have the same feature value as the object to be inserted is supplemented by the object to be inserted.
  • the insertion step is performed such that there is no object between the separators of the pair of separators after the insertion step.
  • the dividers prevent an item from being inserted directly between two other already sorted items. Such a direct insertion could kink or otherwise damage an object. In addition, objects could adhere to each other. Rather, an object is inserted between two separating elements. By suitable design of the separating elements ensures that damage is avoided.
  • the separating elements Thanks to the separating elements, it is possible to place even flat flexible articles in an order without damaging them, for example flat postal items, bills, food, books, etc.
  • the handling machine inserts a further separating element between two separating elements of the determined separating element pair.
  • the flat objects to be sorted are mail items, ie standard letters, large letters, catalogs, postcards, etc. Each item of mail extends in an object plane.
  • Each mail item to be sorted is to be transported to one destination each. All these destinations are in a given area, the z. B. the catchment area of a Sorting center belongs.
  • the area is subdivided into disjoint subareas, ie each possible destination point belongs to exactly one subarea.
  • Each subarea is assigned to a delivery agent.
  • Each item of mail is provided with information about the destination to which this item of mail is to be transported.
  • these destination information acts as the feature values according to which the objects are to be sorted. It is of course possible that there is an "endorsement" and that the item of mail is to be transported in accordance with this preliminary order.
  • Each delivery point sequence is predetermined by the sequence in which the deliverer visits the destination points of the subarea assigned to him in order to deliver the mailpieces and to deposit or deliver them to the respective destination points.
  • the destination point order is the default feature order.
  • a sorting system is to sort all mailpieces for destination addresses in the area such that all mailpieces are sorted according to the destination point orders for the subareas, and this for all formats of mailpieces.
  • the mail items for a sub-area are to be spent after sorting in one or more transport containers and sorted in these transport containers transported to the respective delivery post office. There, a deliverer receives the mail for his sub-area. The deliverer no longer has to sort the mailpieces because the mailpieces in the containers are arranged so that they are sorted according to the course sequence.
  • a first class of mail items contains the standard letters, that is to say the mail items whose width, height and thickness are within predetermined value ranges.
  • a second class contains each mailing with a Dimension that is outside the given value range, ie long or thick mail.
  • the mail items are divided according to their dimensions on the at least two predetermined classes.
  • a format separation device is preferably used, for. B. a drum with different width slats or a device with different width slots.
  • Such devices are DE 10148226 C1 .
  • a large consignor delivers mail from the outset sorted by class, eg. B. to save transport charges.
  • a first sorting system sorts the mail items of the first class, that is, the standard letters.
  • the first sorting system has been optimized for high throughput and can therefore sort standard letters quickly.
  • a second sorting system sorts the mail items of the second class, that is, the large letters, catalogs, etc.
  • the second sorting system is optimized for being able to process mailpieces of different dimensions quickly. Such sorting are z. B. off WO 2006100594 A1 .
  • a single sorting system for both classes of mailpieces would achieve a lower throughput than the two sorting systems optimized for their respective task.
  • the first sorting run is carried out both by the first sorting installation and by the second sorting installation.
  • a third sorting installation sorts the mailpieces of both classes in a subsequent second sorting run and produces the predetermined destination point sequences under these mailpieces.
  • This merge sorting system is responsible for the area into which the mailpieces are to be transported.
  • Each feeder for a class is configured to successively feed stacks of mail of that class to the feeder and the feeder separates the fed mail so as to form a stream of spaced-apart mail of a class.
  • the feeder for the first class of mail (standard letters) in the embodiment has a higher throughput than the feeder for the second class (large letters). As a rule, significantly more standard letters than large letters are to be sorted.
  • the transport device 21 transports the sequence of mutually spaced and upright mail items through the sorting system.
  • the transport means 21 comprises a system of several vertically arranged Endless conveyor belts, two of which pinch a mail item temporarily between them. It is possible that a mail item is turned by two conveyor belts.
  • the reading device 22 In each case generates a digital image of that side of a mail item on which the data for the delivery address have been applied.
  • the reading device 22 evaluates this image and first tries to automatically decipher the delivery address, z. B. by "Optical Character Recognition” (OCR) or by "bar code reading". If this is not successful, the image is displayed on a screen of a video coding station. An editor reads the delivery address and enters it into a keyboard or similar.
  • OCR Optical Character Recognition
  • the machine controller 24 evaluates a computer-available sorting plan SP.
  • This sorting plan SP assigns each delivery address of a mail item to an output device.
  • the sorting plan SP determines that mailpieces with which delivery addresses are to be ejected into which output device.
  • there are considerably more possible delivery addresses than output devices so that the sorting plan SP generally assigns a plurality of delivery addresses to an output device 2.1, 2.2,.... It is possible that the sorting plan SP reserves individual output devices for only one delivery address at a time, because many postal items are addressed to this delivery address.
  • the transfer device 21 transports the mail item further to the discharge device 23.
  • This discharge device 23 preferably comprises a sequence of points, namely in each case at least one point per output device 2.1, 2.2, .... In each case a discharge path connects the transport path with the output device.
  • the switch selectively redirects a mail item into the removal path or leaves the item of mail in the transport path.
  • the actual transport speed of each transport path is measured.
  • the machine controller 24 therefore "knows” when each mailpiece is at which position in the transport device 21.
  • the machine controller 24 "knows” the respective delivery address of each mailpiece after the reader 22 deciphers that delivery address.
  • the machine controller 24 controls the switch that connects the transport path with the discharge path that leads to the output device into which the mail item is to be removed in accordance with the read delivery address and the sorting plan SP.
  • the mail item is removed by means of the switch from the transport path and transported on the discharge path to the output device.
  • the plurality of output devices 2.1, 2.2,... are arranged one behind the other as seen in a longitudinal direction L.
  • the longitudinal direction L is away from the feeder. It is possible that the output devices 2.1, 2.2, ... are mounted in several rows and the rows are arranged vertically or obliquely one above the other. Each row extends along the longitudinal direction L.
  • the conveyor device 1 also extends along the longitudinal direction L.
  • the endless conveyor belt 11 transports mailpieces from the output units 2.1, 2.2,... Either in the transport direction T to the endless conveyor belt 26.1, so that the mailpieces in a second sorting cycle again carry out the merging process. Can go through sorting system, or in the opposite direction.
  • a support device 10 prevents mail from the conveyor belt 11 can fall.
  • each dispensing unit comprises a support surface and a coupling point for temporarily coupling one transport container each.
  • a transport container will connect in a defined position with the output unit, is automatically filled by the sorting with sorted mail and is separated after filling again from the output unit and transported away.
  • each dispensing unit each contains a sorting compartment for postal items and a support surface for at least one transport container.
  • the sorting system discharges the mail items for a transport container into the sorting compartment of the output unit. After all mail items have been sorted, the sorted mail items are each transported from a sorting compartment into a transport container, wherein the transport container stands on the support surface, and transported away in this transport container.
  • a stack of flat and upright postal items is formed in or on each dispensing unit. All object levels of the mailpieces of this stack are approximately perpendicular to a stacking direction in which the stack extends.
  • the bottom of the dispensing unit is inclined.
  • This also a transport container, which is in the output unit, inclined.
  • This configuration causes the flat and upright mailpieces are aligned in the output unit on a side wall or edge of the output unit and on the ground, ie at two levels.
  • the direction in which the bottom of the dispensing unit is inclined is in one embodiment perpendicular to the stacking direction. Seen in the stacking direction, the bottoms of adjacent output units form a sawtooth-shaped line.
  • a support member compresses the stack.
  • the growing stack displaces this support element against the force of a spring.
  • the output units are arranged in one or more rows so that at least one output unit order is formed.
  • Each row consists of a number of adjacent output units.
  • several rows of output units are perpendicular or obliquely one above the other.
  • the merge sorting system applies a computer-available sorting plan.
  • This sorting plan allocates one output unit to each possible destination point of the area. Because there are many more possible destination points than output units, the sorting plan assigns the same output unit to each of several possible destination points. Preferably, the sorting plan ensures that the predetermined destination order corresponds to the output unit order. This means that the sorting plan assigns two possible destination points, which follow each other in the same destination order, either the same output unit or two directly adjacent output units.
  • Each dispensing unit also has a respective guide element and a plurality of movable separating elements.
  • Each separating element has in one embodiment a separating surface and a connecting member.
  • the connecting link connects the separating surface with the guide unit.
  • the separating element has the shape of a paddle and has a smooth surface, so that a mail item can slide along the separating surface with little friction.
  • the parting surface is preferably so rigid that inserting a mailpiece does not bend the parting surface.
  • the guide member is attached to one side of the dispensing unit.
  • the stack with the mail lies next to the guide element, for. B. obliquely above the guide element.
  • Each separator can be moved by a linear movement in the opposite direction and the stacking direction.
  • the guide element ensures that the separating element is only able to perform linear movements along a limited distance on both sides.
  • the interface extends approximately parallel to the article planes of the flat mailpieces of the stack.
  • each separating element can be rotated about a rotation axis that runs parallel to the stacking direction. As a result, the separating element can be moved between an engaging position in which the separating element can be inserted into a stack in the output unit engages, and a release position in which the separating element does not engage in the stack, swing back and forth. It is also possible that each or at least some of the separating elements can be pivoted back and forth by a vertical linear movement between the engagement position and the release position.
  • each separating element consists only of a flat parting surface, which are not connected to the output unit.
  • the merge sorting system also has at least one handling machine, z. B. a robot.
  • This handling machine is able to insert a mail item between two mailpieces of a stack in an output unit, in each position in the stack.
  • Each output unit of the merge sorting system can be reached by at least one handling machine, at each position of a stack with mailpieces in this dispensing unit.
  • one of the handling machines can also position a separating element at any desired position of each dispensing unit. For example, the automatic handling machine spends the separating element in the release position, displaces the separating element along the guide element and spends the separating element at the desired position into the engaged position. Or the handling machine removes the separator from a supply of not used dividing elements and positions the separator at the desired position. It is possible that an automatic handling machine can reach several output units.
  • the merge-sorting system per output unit each has an automatic handling machine.
  • FIG. 1 schematically four handling machines 12.1, 12.2, 12.3 and 12.4 are shown, which are assigned to the four output units 2.1, 2.2, 2.3 and 2.4.
  • the handling machine 2.2 is shown schematically. Each handling machine 2.1, 2.2, ... can a separating element and another mail item in a stack in the assigned output unit 2.1, 2.2, ... insert and remove the separator again from this stack.
  • Each output unit is still assigned a cache.
  • the transport device spends each mail item from the respective feed device via a transport path to the buffer of the output unit into which this mail item is to be ejected. If this buffer is filled, then the transport device spends the mail item in another buffer, which is currently free, z. B. in the cache of an adjacent output unit.
  • the temporary storage device is, for example, a pocket or a narrow compartment into which a postal item is inserted, or a surface onto which the postal item is placed, or a staple which temporarily grips the postal item.
  • the buffer comprises a sensor which detects and notifies whether there is currently a mail item in the buffer or not.
  • the two classes of mail items in the first sorting run are sorted separately from one another, namely the mailpieces of the first class from the first sorting system and those of the second class from the second sorting system.
  • a stream of mail for the area reaches the merge sorting facility.
  • first of all the mail items of the first class for the area (the standard letters) reach the merging sorting plant and then the mail items of the second class (the large letters) or vice versa. It is also possible that mailings of both classes in mixed order reach the merge sorting system.
  • the merge sorting system determines to which destination this mail item is to be transported. Read this for this the merge sorting system either a machine-readable encoding, z. As a bar pattern ("bar code") on the mailpiece. Or the merge-sorting system uses a method of "fingerprinting" to recognize the mailpiece based on a feature vector and to retrieve the already read and stored destination information. Such methods are z. In DE 4000603 C2 . EP 1222037 B1 and WO 2008059017 A1 described.
  • the merging sorting system evaluates the sorting plan, determines which output unit is associated with the destination of the mailpiece, and thereby determines into which output unit this mail item is to be ejected.
  • a transport device of the merge sorting system transports the mail item to the buffer of this determined output unit.
  • This additional mail item is now to be inserted into the stack of mail items already in the dispensing unit, namely at the correct position, that is to say at the position which is defined by the destination address of the additional mail item and by the predetermined destination order.
  • the mail items of the stack are already sorted according to the destination order and may contain mail items of all classes. Those mail items of the stack which are to be transported to the same destination point form a partial stack in the stack.
  • the stack thus comprises a sequence of sub-stacks. The order in which the mail items for the same destination point are sorted into the sub-stack or are in this sub-stack does not matter.
  • the stack consists of a sequence of two separating elements in the engaged position, then two partial stacks of mail items, then again two separating elements in the engaged position, then again two partial stacks of mail items and so forth.
  • the partial stacks are already sorted according to the destination order. Because a total of two separating elements engage less in the stack, as partial stacks are present, separating elements are compared saved an embodiment in which always a separating element between two separating elements is always provided. As a result, separating elements and space in the stacking direction can be saved.
  • each separating element is provided with a machine-readable marking. In another embodiment, the separating elements are indistinguishable.
  • Fig. 2 shows by way of example a stack in an output unit 2.2 before inserting an additional mail item Ps. Shown is the section of the stack, which consists of the sub-stacks TS (9) to TS (14) for the destination points ZP (9) to ZP (14).
  • the destination order determines the order of: ZP (1) first, then ZP (2), then ZP (3), and so on.
  • the buffer Zw2 of the output unit 2.2 indicated.
  • the separating elements TE1 and TE2 separate the mail pieces of the partial stacks TS (9) and TS (10), the dividing elements TE3 and TE4 separate the mailpieces of the partial stacks TS (11) and TS (12), and the separating elements TE5 and TE6 separate the mailpieces the partial stack TS (13) and TS (14).
  • the boundaries between the sub-stacks TS (9), TS (10), ... are indicated by dashed lines.
  • the sub-stacks TS (12) and TS (13) and between the sub-stacks TS (14) and TS (15) there are no separators or other separations.
  • the merging sorting system has stored the information as to which items of mail have already been discharged into the output unit 2.2 and are in which sub-stacks. In addition, the merge sorting system has stored, which partial stacks by two separating elements are separated from each other and which are not. If the separating elements are provided with machine-readable markings, then the merging sorting system has stored which separating element is located between which sub-stacks. Otherwise, the merge sorting system has stored which partial stacks (ie partial stacks for which target points) are separated by separating elements.
  • the merge sorting system has determined that this item of mail Ps is to be transported to the destination point ZP (10) and therefore the sub-stack TS (10) is to be supplemented by this item of mail Ps.
  • the merging sorting system determines that the output unit 2.2 has been assigned to the destination point ZP (10). Therefore, the merge sorting system transports the additional mail item Ps to the buffer memory Zw2 of the output unit 2.2.
  • the automatic handling machine automatically detects that the partial stack TS (10) is located between the pair of separating elements with the separating elements TE2 and TE3 and is adjacent to the separating element TE2.
  • the separating element TE1 adjoins the separating element TE2.
  • the handling machine evaluates the information about partial stacks and separating elements for this determination, which has determined and stored the merge sorting system as described above. If the separating elements are provided with machine-readable markings, a reading device of the automatic handling machine evaluates these markings. Otherwise, a reader counts the dividers beginning with the first separator in the output unit 2.2 to find the pair of dividers to which the partial stack TS (10) adjoins.
  • the additional mail item Ps is intended to supplement the partial stack TS (10).
  • the additional mail item Ps is therefore inserted between the two separating elements TE1 and TE2.
  • the separating element TE2 is subsequently displaced, namely inserted between the additional mail item Ps and the separating element TE1.
  • the separating element TE2 damaged when inserting the additional mail item Ps or another mail item.
  • the output unit 2.2 has at least one additional separating element TE7.
  • This additional separating element TE7 is currently either in a release position and is in a separate parking position. Or the additional separating element TE7 is in an engaged position and is located at the point in the stack in the output unit 2.2 at which the automatic handling machine has previously inserted the additional separating element TE7.
  • the handling machine initially positions the additional separating element TE7 in the stack in an engaging position such that the additional separating element TE7 is located between the two separating elements TE1 and TE2.
  • the additional separating element TE7 does not come into contact with mailpieces. This contact avoid the two separating elements TE1 and TE2.
  • the dividing elements TE1, TE7 and TE3 are now located between the two sub-stacks TS (9) and TS (10). This situation shows Fig. 3 ,
  • the additional mail item Ps is inserted between two of these three separators TE1, TE7 and TE2.
  • the additional mail item Ps is intended to supplement the partial stack TS (10). Therefore, the additional mail item Ps is inserted between the separator TE2 adjacent to the destination sub-stack TS (10) for the destination point ZP (10) of the additional mail item Ps and the separator TE7 adjacent to the separator TE2.
  • the automatic handling machine grips the mail item Ps to be inserted from the intermediate memory Zw2 of the output unit 2.2 and inserts the mail item Ps between the separating elements TE2 and TE7.
  • the situation after this insertion shows Fig. 4 . Because the Handling machine inserts a mail item between the two parting surfaces of the separating elements TE2 and TE7, it is impossible that the inserted mail item Ps or a mail already in the stack is kinked or otherwise damaged by the process of insertion or that the mail item Ps with another Staples mail together. This advantage is achieved no matter how large the mail item Ps is.
  • the handling machine concludes the insertion of the mail item Ps in the stack. Subsequently, the separating element TE2 is no longer needed to insert the mail item Ps. The separating element TE2 now functions as the additional separating element of the output unit 2.2, thus assuming the function which previously occupied the separating element TE7.
  • the separator TE2 remains in the stack at that location and in the engaged position until another mail item is to be inserted into the stack or the sorting is completed.
  • the automatic handling machine removes the separating element TE2 from the stack, for example by the automatic handling machine immediately transferring the separating element TE2 from the engaging position into the release position.
  • Fig. 5 shows the situation after removal of the separator TE2. If necessary, the separating elements push together the stack in the output unit 2.2 and thus close the gap that has arisen due to the removal of the separating element TE2.
  • the output unit 2.2 has a retaining element.
  • This retaining element prevents a mail item from being pulled out of the stack in the dispensing unit when the automatic handling machine removes the separating element TE2 from the stack.
  • the retaining element is designed as a retaining edge or as a rod. The automatic handling machine inserts a mail item into the stack, wherein the automatic handling machine leads the mail item around the retaining element.
  • the buffer Zw2 of the output unit 2.2 has been used to buffer the additional mail item Ps. After the mail item Ps has been inserted into the stack, this buffer Zw2 is again available for further mailings.
  • the sensor of the intermediate memory Zw2 notifies the merge sorting system whether the intermediate memory Zw2 is currently occupied or free.
  • the handling machine is able to grip over a plurality of output units and therefore to remove a mail item, optionally, from one of a plurality of reachable buffer stores.
  • the output unit 2.2 preferably has a fill level sensor. It is possible that the merge sorting system determines that the output unit 2.2 has reached a predetermined level and can no longer receive further mail items. This determines the merge sorting system either on the basis of a message from the fill level sensor or by counting the number of mailpieces that the merge sorting system has hitherto discharged into the output unit 2.2 or measures and adds the thicknesses of these mailpieces. If then further mail item "actually"striaschleusen in the output unit 2.2, so preferably the steps described below are performed.
  • the merge sorting system changes the default sorting plan. For two target points ZP (n) and ZP (n + 1), the changed sorting plan no longer allocates the completely filled output unit 2.2, but another, less filled output unit 2.x. These two target points ZP (n) and ZP (n + 1) are selected so that they immediately follow one another in the target point sequence and the two partial stacks TS (n) and TS (n + 1) for these two selected target points are located between two separators.
  • the automatic handling machine extracts the two partial stacks TS (n) and TS (n + 1) from the filled output unit 2.2.
  • the handling machine introduces a gripping hand or a similar gripping element between the two separating elements and the two partial stacks TS (n) and TS (n + 1) into the stack.
  • the gripping element grips the two partial stacks TS (n) and TS (n + 1), removes them from the output unit 2.2 and inserts them into the less-filled output unit 2.x.
  • the handling machine removes the separating elements, for example by transferring all separating elements from the engagement position to the release position.
  • the retaining elements prevent a mail item from being removed unintentionally from an output unit when the separating elements TE1, TE2,... Are removed.
  • LIST OF REFERENCE NUMBERS reference numeral importance 2.1, 2.2, ... output units 2.2 Output unit with the sub-stacks TS (9), TS (10), ...

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EP10160254A 2009-05-11 2010-04-19 Procédé et dispositif destiné au tri d'objets postaux Withdrawn EP2253390A1 (fr)

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DE102009020664A DE102009020664A1 (de) 2009-05-11 2009-05-11 Verfahren und Vorrichtung zur Sortierung von verschiedenartigen Gegenständen

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