EP3107663B1 - Procédé pour le tri postal des faibles flux de courrier - Google Patents

Procédé pour le tri postal des faibles flux de courrier Download PDF

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Publication number
EP3107663B1
EP3107663B1 EP15704336.5A EP15704336A EP3107663B1 EP 3107663 B1 EP3107663 B1 EP 3107663B1 EP 15704336 A EP15704336 A EP 15704336A EP 3107663 B1 EP3107663 B1 EP 3107663B1
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EP
European Patent Office
Prior art keywords
sorting
machine
outlet
destination
outlets
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.)
Not-in-force
Application number
EP15704336.5A
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German (de)
English (en)
French (fr)
Other versions
EP3107663A1 (fr
Inventor
Didier Tresse
Karim Kara
David Morisot
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.)
Solystic SAS
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Solystic SAS
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Publication of EP3107663A1 publication Critical patent/EP3107663A1/fr
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Publication of EP3107663B1 publication Critical patent/EP3107663B1/fr
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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
    • B07C3/003—Destination control; Electro-mechanical or electro- magnetic delay memories
    • B07C3/006—Electric or electronic control circuits, e.g. delay lines
    • 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 field of the invention is that of postal sorting.
  • the invention relates more particularly to a method for sorting mail items according to M sorting destinations in a postal sorting machine comprising N sorting outlets, with M> N, by using in the sorting machine a process for dynamically allocating sorting outlets to the sorting destinations and according to which if a sorting destination of a current mail item to be sorted is on-booking, substituting said sorting destination on-reserve for another sorting destination already assigned to a sorting destination; some sorting output of the machine for storing the current mail item in that certain sorting outlet.
  • Dynamic assignment or allocation is a process of assigning or allocating a sorting output of the sorting machine to a sorting destination as a mail item moves through the sorting machine after automatic evaluation. the address on this mail article.
  • the machine has a dynamic sorting plan with sorting destinations that are dynamically matched with the sorting outputs of the sorting machine.
  • the mechanism of over-booking in a process of dynamic assignment of the sorting outlets of a sorting machine makes it possible to operate a sorting machine that has fewer sorting outlets than there are sorting destinations and consists in use as a sort output to sort a current mail item corresponding to a certain sorting destination in the sorting plan, a sorting output already assigned to another sorting destination.
  • the mail items already sorted in this sorting outlet must then be evacuated from this sorting outlet to make room for the current mail item and the other subsequent mail items having the same sorting destination as this item. mail article.
  • Mail items evacuated from the sorting outlet can be transported out of the sorting machine into storage bins.
  • the low mail flows i.e., low volume mail batches having low sorting destinations
  • strong mail flows large volume mail lots
  • sorting outlets of the sorting machine can remain almost empty for sorting purposes when sorting low mail flows.
  • the almost empty sorting outlets can be exchanged for bins, but then the small content of these sorting outlets that is removed from the sorting machine, for example in bins. storage, which themselves remain almost empty, significantly affects the costs of mail transport, when for example, these almost empty storage bins are then transported by trucks, boats or other means of transport.
  • a method according to the preamble of claim 1 is known from the document WO-2009/081008 .
  • the object of the invention is to remedy these drawbacks and in particular to minimize the impact of weak mail flows in this type of process.
  • the idea behind the invention is to identify the weak mail flow dynamically during a sorting pass of this mail and to cause massification or grouping of mail items with low filling density. and reprocess these at the end of the sorting process during a new automatic sorting process.
  • the first threshold may be between 70 and 80% and the second threshold may be between 45 and 55%.
  • the method according to the invention can be applied to different types of postal objects, such as letters, flat items of large format, mail in plastic or paper envelopes or mixed mail, this list is not exhaustive.
  • the method according to the invention preferably applies to sorting the mail in a sorting pass in sorting centers.
  • the method according to the invention can also be applied for successively sorting a first mail flow and a second mail flow in a sorting machine without having to carry out a complete emptying of the sorting outlets of the sorting machine after the sorting of the sorting machine. first mail flow.
  • the two sorting plans of these two mail flows respectively are merged or grouped within a single sorting plan.
  • the mail items of the second mail flow will progressively replace the mail items of the first mail flow due to the over-booking mechanism, but overall the mail processing time will be reduced. compared to a separate sort of mail flow.
  • FIG. 1 very schematically illustrated a postal sorting facility comprising a mail sorting machine 1 adapted for carrying out the method according to the invention.
  • the postal sorting machine 1 here comprises, by way of example, an input 2 of mail items to be sorted which feeds a carousel with buckets 3, the cups of the carousel not being represented on the machine. figure 1 .
  • the carousel cups each normally carry one mail piece at a time and circulate in a loop over a set of physical sorting outlets 4 of the machine, here arranged in line on two opposite sides of the machine.
  • each sort outlet 4 is provided with a removable storage bin 5. More particularly, the article of mail that is transported in a cup 3 of the carousel falls by gravity in the storage bin 5 of the sorting outlet 4 which is assigned or allocated to the sorting destination corresponding to this mail item.
  • FIG. 1 there is illustrated a stream of mail items 6 arranged in stack on edge in a feed magazine of a unstacker 2A placed at the feed inlet 2 of the sorting machine.
  • stacked mail items 6 are serialized by the unstacker 2A of the type for example perforated band and suction nozzles.
  • an image acquisition unit 2B Downstream of the unstacker 2A, an image acquisition unit 2B forms an image of the address block of each article and by OCR, this address is automatically recognized in the image by a data processing unit 7 which controls the equipment of the sorting machine.
  • the data processing unit 7 determines a sorting destination in a sorting plan that associates a sorting destination (sorting code) with a physical output of sorting of the sorting machine.
  • a sorting destination can be a postal code.
  • Mail items with the same postal code in their distribution address block can therefore be sorted into the same sorting output of the machine.
  • means 2C are provided for measuring the thickness of each serialized mail item so that the unit 7 can estimate by run-of-the-river accumulation for each sorting outlet as the items are stored.
  • mail a fill level in mail items. Subsequently, reference will be made to a relative level of storage or filling ratio between 0 and 100%.
  • the thickness of each mail piece can be measured by sensors or by imaging as is known to those skilled in the art.
  • the unit 7 is still arranged to record in correspondence with each sorting output, a date which corresponds to the date of storage of the last mail item in the sorting outlet. This date is an indication of seniority for the sorting output activity. This storage date may correspond to the date of determination of the unloading of the mail item in the sorting outlet in question by the unit 7. This date can be provided by an internal clock of the unit 7.
  • the number M of sorting destinations of the sorting plane is greater than the number N of physical sorting outlets of the sorting machine 1 and therefore the allocation of a physical sorting output 4 to a sorting destination for a mail item 6 to be sorted is done dynamically in the unit 7 at the time of the passage of this article of mail 6 and a mechanism is provided for changing the tray of a output sorting by an empty bin in the case of an over-booking situation as known to those skilled in the art.
  • the principle of the over-booking mechanism consists in forcing the emptying of the sorting outlet (removal of the storage bin already containing mail items corresponding to a certain sorting destination) and its replacement by an empty container to receive new ones. corresponding mail items to another sorting destination.
  • the method according to the invention resides more particularly in the particular selection of the sorting outlet where the exchange of bins takes place in such a way as to minimize as much as possible the volume losses, that is to say the losses generated by the overly systematic removal of trays lightly filled with mail items.
  • the sorting outlet with the most filled storage tank is favored in order to minimize the volume losses for the transport of the bins, but tests have shown that this selection criterion finds its limits as soon as possible. that the M / N ratio is greater than 1.06. The method according to the invention makes it possible to exceed this ratio without additional loss of volume.
  • the figure 2 illustrates the method according to the invention in which the criterion of selection of the sorting outlet for the exchange of bins in case of overbooking combines the taking into account of a tank filling criterion and a criterion of age of storage activity in the bin.
  • the method according to the invention is generally a data processing implemented in the unit 7.
  • the mailing address in the distribution address block 6A has been recognized from an OCR in the image of this mail item provided by the unit 2B.
  • the unit 7 determines from this recognized postal address the sorting destination DL which corresponds to it in the dynamic sorting plan loaded in the unit 7.
  • This sorting destination DL constitutes a grouping for sorting mail items.
  • the sorting destination DL may be, for example, a postal code or a part of a postal code.
  • step 21 the sorting process in unit 7 determines whether or not this sorting destination DL for the current mail item is a mass sorting destination, ie a destination already recognized by the mail item. unit 7 during the sorting process as part of a weak mail flow.
  • the mail items stored in a sorting outlet assigned to a mass sorting destination are grouped at the input of the sorting machine for a new sorting pass in the sorting outlets of the sorting machine.
  • the unit 7 can hold in memory, for example, a table 13 of all the sorting destinations of the sorting plane running in a machine in order to be able to record a indication of massification in association with each sorting destination.
  • This indication may be a binary data of type 1/0 and on the figure 2 for the example there is shown in front of the sorting destination DL a cross symbolizing this binary data.
  • step 21 it is a mass sorting destination
  • the process continues in 22 by sorting the current mail item into the sorting output that is dynamically allocated by the unit. 7 to massive sorting destinations.
  • a machine-specific sorting output can be dynamically allocated to one or more massive sorting destinations.
  • This sorting plan can still be a dynamic sorting plan.
  • step 21 the process continues in step 23.
  • step 23 the unit 7 searches whether a sorting output S is already allocated for the sorting destination DL of the current mailpiece.
  • the indication that a sorting output S is already allocated to the sorting destination DL can be obtained by the unit 7 through the exploration of a second table 14 stored in memory which establishes at each instant the dynamic correspondence of each sorting output of the machine S 1 ... S M with the sorting destinations D 1 ... D M.
  • an indication of filling level N and an indication storage activity duration T are matched with each sorting output S.
  • step 23 the process continues in step 24 by sorting the current mail item into the sorting output S identified by the unit 7.
  • step 23 the process continues in step 25.
  • step 25 the unit 7 searches whether a sorting output S of the sorting machine not yet allocated is available for the sorting destination DL. In this sorting output not yet allocated, the storage bin 5 is empty.
  • step 25 the process continues in step 26 by assigning this available sorting output to the sorting destination DL and the unit 7 ordering sorting of the mail item in this sorting output available.
  • step 26 the unit 7 at the same time records the assignment A between this available sorting output and the sorting destination DL.
  • the N and T indications in the table 14 are also updated in correspondence with this available sorting output.
  • step 27 If not, the process continues in step 27.
  • step 27 the unit 7 identifies among the set of sorting outlets of the machine, by exploring here the table 14, the sorting outlets which have a filling level N greater than a first threshold s1.
  • This first threshold may be between 70% and 80%, for example 75%.
  • the value of this threshold s1 can be made adjustable to take into account the specificities of the mail flows to be sorted.
  • step 27 the unit 7 then searches in step 28 among these sorting outlets for the one with the oldest storage activity, here by scanning the table 14, that is to say the one with the date T of the last storage activity which is the oldest.
  • step 29 The process then continues in step 29 with a bin change in this sorting outlet of older storage activity.
  • the DL sorting destination is substituted in the dynamic sorting plan at the destination that was allocated before that sorting out of the oldest storage activity.
  • the bin that is extracted from this sorting outlet is therefore filled to more than 75% of mail items. It is taken by the conveyor of full bins 8 or 9 on the figure 1 and is then led to a discharge outlet 10 of full bins out of the machine for removal by truck or the like.
  • An empty bin 5 is brought by the empty bin conveyor 11 into this sorting outlet.
  • step 31 the current mail item is sorted in this sorting output and the N and T indications in table 14 are updated. with the parameters found with the current mail item.
  • steps 27 to 31 relate to the processing of dense mail flows.
  • step 27 If, on the other hand, in step 27, no sorting output S is identified by the unit 7, the process continues in step 32 by searching and determining the sorting output S from all the outputs of sorting that has the oldest storage activity or seniority date T in table 14.
  • step 33 if this sorting output of the oldest storage activity has a filling level greater than a second threshold s2 between 45% and 55%, here set at for example 50%, the process continues to step 34 by a bin change in this sorting outlet.
  • the tray filled with mail items is extracted from the sorting outlet and an empty bin is set up in this sorting outlet.
  • This second threshold s2 may be adjustable to take into account the specificities of the mail flows to be sorted.
  • step 34 the sorting destination DL is substituted for the old sorting destination DL 'to which this sorting output was allocated in the sorting plan.
  • the indications D and T in the table 14 are initialized.
  • this former logical destination DL ' is identified by the unit 7 in the table 13 as a sorting destination to be massified, so that the next mail items having this sorting destination DL' will be processed according to the steps 21 and 22 in the figure 2 .
  • step 35 the tray filled with mail items taken from the sorting outlet is fed through the full bin conveyor 8,9 to an outflow 10 of the sorting machine.
  • step 36 the current mail item is sorted in the empty bin of this sorting outlet and the N and T indications are updated in the table 14 with the parameters noted for the article of current mail by means 2B and 2C on the figure 1 .
  • step 33 the sorting output of the oldest storage activity has a filling level lower than the second threshold s2
  • the process continues in step 37 with a bin change as for step 34. and by substitution of DL and DL 'sorting destinations with respect to the sorting output.
  • the old sorting destination DL ' is identified by the unit 7 in the table 13 as a sorting destination to be massified.
  • step 38 the tray filled with mail items that is retrieved from the sorting outlet is returned to the feed inlet 2 of the machine for recycling the mail items it contains.
  • step 39 the current mail item is sorted in the empty bin of this sorting outlet and the N and T indications in the table 14 are updated with the parameters noted for the current mail item.
  • the sorting process is repeated for a new mail item.
  • the table 13 is deleted and the mail items from the mass sorting output and those already brought into storage bins at the feed inlet of the machine are retrieved according to a new sorting pass in the sorting outlets of the machine.
  • a sorting outlet can be allocated to several sorting destinations so as to best fill the storage bins in the sorting outlets and to minimize the cost of transporting the bins filled with mail items.
  • the method according to the invention can also be applied to sorting outlets for which the storage receptacles of sorted mail items are stackers.
  • the evacuation of a tray as described above in a sorting outlet can be achieved by the unloading of a spacer in the sorting outlet stacker as is known to those skilled in the art and by the use of a light at the sorting exit which signals to a Machine Operator that he must manually transfer the contents of the stacker to a storage bin to which a container label will be affixed, the tray being able to then be moved to a discharge outlet of the machine or to the feed inlet of the sorting machine.
  • the method of the invention is applicable to the sorting of mixed mail comprising small format mail items such as letters and large format mail items such as magazines.
  • the method according to the invention applies, as indicated above, to the sorting of several mail streams according to a single dynamic sorting plan resulting from a merger of the respective dynamic sorting planes of the mail flows loaded in a machine.
  • the mail flows are successively loaded at the input of the machine and there is no emptying of the sorting outlets during the first sorting pass of all these mail items which allows a better use performance of the sorting machine.

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  • Sorting Of Articles (AREA)
  • Character Discrimination (AREA)
EP15704336.5A 2014-02-17 2015-01-14 Procédé pour le tri postal des faibles flux de courrier Not-in-force EP3107663B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1451231A FR3017546B1 (fr) 2014-02-17 2014-02-17 Procede pour le tri postal des faibles flux de courrier
PCT/FR2015/050087 WO2015121554A1 (fr) 2014-02-17 2015-01-14 Procédé pour le tri postal des faibles flux de courrier

Publications (2)

Publication Number Publication Date
EP3107663A1 EP3107663A1 (fr) 2016-12-28
EP3107663B1 true EP3107663B1 (fr) 2018-03-14

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Application Number Title Priority Date Filing Date
EP15704336.5A Not-in-force EP3107663B1 (fr) 2014-02-17 2015-01-14 Procédé pour le tri postal des faibles flux de courrier

Country Status (6)

Country Link
US (1) US9669430B2 (ja)
EP (1) EP3107663B1 (ja)
JP (1) JP6310564B2 (ja)
FR (1) FR3017546B1 (ja)
SG (1) SG11201605365WA (ja)
WO (1) WO2015121554A1 (ja)

Families Citing this family (6)

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US10745210B2 (en) 2017-03-10 2020-08-18 Walmart Apollo, Llc Sorting machine with dynamic lane routing
US11727347B2 (en) 2017-11-28 2023-08-15 United States Postal Service Automated system for management of receptacles
CN111914379A (zh) * 2019-05-07 2020-11-10 顺丰科技有限公司 一种动态仿真方法及装置
CN112184096B (zh) * 2019-07-05 2023-02-28 顺丰科技有限公司 一种分拣格口分配方法、系统、终端及存储介质
US11548035B2 (en) * 2019-07-26 2023-01-10 United States Postal Service Item sorting with delivery point compression
CN110802030B (zh) * 2019-11-15 2021-07-02 南华大学 一种包裹分拣方法、装置、设备及可读存储介质

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DE19528803C1 (de) * 1995-08-05 1997-01-30 Licentia Gmbh Verfahren zum Sortieren von Sendungen
JPH09239325A (ja) * 1996-03-11 1997-09-16 Hitachi Ltd 郵便物配達順並べ替え区分方法および装置
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US8504192B2 (en) * 2007-12-13 2013-08-06 Solystic Method of sorting mailpieces by using a process for dynamically allocating sorting outlets
FR2945462B1 (fr) * 2009-05-15 2011-04-22 Solystic Procede pour trier des envois postaux dans une machine de faible capacite.

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Publication number Publication date
WO2015121554A1 (fr) 2015-08-20
US9669430B2 (en) 2017-06-06
FR3017546A1 (fr) 2015-08-21
SG11201605365WA (en) 2016-09-29
US20160339480A1 (en) 2016-11-24
JP2017510433A (ja) 2017-04-13
FR3017546B1 (fr) 2016-02-05
EP3107663A1 (fr) 2016-12-28
JP6310564B2 (ja) 2018-04-11

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