EP2096056A2 - Procédé et dispositif de séparation d'objets - Google Patents

Procédé et dispositif de séparation d'objets Download PDF

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Publication number
EP2096056A2
EP2096056A2 EP09153489A EP09153489A EP2096056A2 EP 2096056 A2 EP2096056 A2 EP 2096056A2 EP 09153489 A EP09153489 A EP 09153489A EP 09153489 A EP09153489 A EP 09153489A EP 2096056 A2 EP2096056 A2 EP 2096056A2
Authority
EP
European Patent Office
Prior art keywords
traction means
speed
traction
separating
article
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP09153489A
Other languages
German (de)
English (en)
Other versions
EP2096056A3 (fr
EP2096056B1 (fr
Inventor
Oliver Kutzer
Hauke LÜBBEN
Michael Schwarzbauer
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
Original Assignee
Siemens AG
Siemens Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE102008014676A external-priority patent/DE102008014676A1/de
Application filed by Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of EP2096056A2 publication Critical patent/EP2096056A2/fr
Publication of EP2096056A3 publication Critical patent/EP2096056A3/fr
Application granted granted Critical
Publication of EP2096056B1 publication Critical patent/EP2096056B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H3/00—Separating articles from piles
    • B65H3/46—Supplementary devices or measures to assist separation or prevent double feed
    • B65H3/52—Friction retainers acting on under or rear side of article being separated
    • B65H3/5246—Driven retainers, i.e. the motion thereof being provided by a dedicated drive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H5/00—Feeding articles separated from piles; Feeding articles to machines
    • B65H5/06—Feeding articles separated from piles; Feeding articles to machines by rollers or balls, e.g. between rollers
    • B65H5/062—Feeding articles separated from piles; Feeding articles to machines by rollers or balls, e.g. between rollers between rollers or balls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H7/00—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles
    • B65H7/02—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors
    • B65H7/06—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors responsive to presence of faulty articles or incorrect separation or feed
    • B65H7/12—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors responsive to presence of faulty articles or incorrect separation or feed responsive to double feed or separation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2220/00—Function indicators
    • B65H2220/09—Function indicators indicating that several of an entity are present
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/44—Moving, forwarding, guiding material
    • B65H2301/445—Moving, forwarding, guiding material stream of articles separated from each other
    • B65H2301/4451—Moving, forwarding, guiding material stream of articles separated from each other forming a stream or streams of separated articles
    • B65H2301/44514—Separating superposed articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/10—Rollers
    • B65H2404/14—Roller pairs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/50—Occurence
    • B65H2511/51—Presence
    • B65H2511/514—Particular portion of element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/50—Occurence
    • B65H2511/52—Defective operating conditions
    • B65H2511/524—Multiple articles, e.g. double feed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2513/00—Dynamic entities; Timing aspects
    • B65H2513/10—Speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2513/00—Dynamic entities; Timing aspects
    • B65H2513/10—Speed
    • B65H2513/11—Speed angular
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/13—Parts concerned of the handled material
    • B65H2701/131—Edges
    • B65H2701/1311—Edges leading edge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/13—Parts concerned of the handled material
    • B65H2701/131—Edges
    • B65H2701/1313—Edges trailing edge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/19—Specific article or web
    • B65H2701/1916—Envelopes and articles of mail

Definitions

  • the invention relates to a method for separating articles from a stack into a stream of articles, wherein the articles are withdrawn from the stack with a take-off means and overlapping objects are separated from each other with a release agent and attack respectively several traction means of the release agent on the object on both sides of the withdrawn article be operated with different propelling speed in the transport direction, traction means which attack the front of the object in the transport direction, are operated at a faster propulsion speed, as traction means which attack further behind the object.
  • the invention relates to a device for separating objects from a stack into an article stream with a withdrawal means for withdrawing the articles from the stack, a release agent for separating overlapping objects and a process means for controlling the singulation, wherein the release agent arranged on both sides of the release means
  • Each having a plurality of traction means for joint attack on the object and the traction means are operated at different propulsion speed in the transport direction and wherein the processing means is provided to drive traction means which attack the front of the object in the transport direction, with a faster propelling speed, as traction means, the farther back attack the object.
  • Flat items such as letters, large letters, postcards, shrink-wrapped magazines and the like are sorted in letter centers or large post offices in huge numbers according to their address and stored in a variety of stacking compartments.
  • the flat objects are first stacked and then singulated from the stack and into a stream of articles brought in which the objects are spaced apart and can be steered independently of each other.
  • An apparatus for separating flat objects is known from DE 10 2004 037 422 B3 known.
  • the objects to be separated are accelerated by several independently controllable in their speed belt and fed to a transport line.
  • retaining elements are arranged opposite the belts, by which double-peeled objects are retained.
  • the object directed to the method is achieved by a method of the type mentioned, in which according to the invention the traction means are each driven at one side of the article with a higher propulsion speed than the respectively opposite traction means.
  • the retention of a double-peeled object must therefore not be done by static retaining elements, but can be done by driven traction means, for example, cause a slower propulsion, stopping or a return of the double-peeled object. Retention of double-peeled objects can thereby be controlled and performed very efficiently and reliably.
  • the traction means When operating the traction means on both sides of the withdrawn article each with different propulsion speed - On each side of the article, the traction means are thus operated at the same time with a different propelling speed - also a retention depending on the position of the object can be controlled in the release agent.
  • the separation of the overlapping objects by the release agent may take place during or after removal of the articles by the withdrawal means.
  • the traction means are preferably controlled by a process means with different propulsion speed, wherein advantageously all traction means are individually controlled, the traction means can thus be addressed individually by the processing means.
  • the traction means are advantageously arranged in pairs opposite the object and serve to transport the article in the transport direction. By “opposite” and “on both sides of the withdrawn article” it can be understood that the traction means are connected to e.g. two flat sides of the object are arranged, the object is thus arranged between the traction means.
  • the objects run on a transport path through the separating means, wherein the traction means are arranged on both sides of the transport path and can thereby attack from both sides of the object in the transport path.
  • the items may be postal items of any kind, especially postal items such as letters, large letters, flats, magazines, catalogs, books, parcels or packages.
  • the articles are flat articles whose thickness does not exceed 20%, preferably 10%, of their height.
  • the height refers to an object standing on a longitudinal edge.
  • the withdrawal means expediently has a trigger element for pulling on an object to be deducted, which applies a force in the withdrawal direction to the object and thus pulls it off.
  • An article stream comprises a plurality of objects transported one behind the other and each standing on its longitudinal edge.
  • the Pulling means arranged in pairs opposite to the object.
  • two traction means each can apply a force and a counter force to the object and transport it at a defined speed.
  • all traction means are arranged in pairs.
  • two identical traction means are arranged opposite to each other, in particular with an exactly opposite to the object engaging bearing surface.
  • a fine gradation of speeds or accelerations of the objects can be achieved if the traction means have rollers for bearing against the objects. It can be dispensed with straps and a contact lines or contact surface of the rollers on an object can be kept small.
  • a further advantageous embodiment of the invention provides that such traction means, which act in the transport direction at the front of the object, so e.g. are arranged in the transport direction at the front in the means of transport, are operated at a faster transport speed, as such traction means which attack further behind the object, that are arranged further back in the transport.
  • This allows the item to be held tight.
  • overlapping and staggered objects can be separated from each other. This can be achieved because, with increasing forward speed of the traction means in the transport path, a further rearwardly arranged object is relatively retained. Front and back can be seen in relation to the transport movement of an item away from the stack and into the item stream.
  • the transport speed in the transport is divided into several different, preferably at least four different propulsion speeds.
  • the traction means may each have one or more tension elements, eg rollers.
  • a particularly finely graduated speed increase and a fine spatial resolution of a speed determination of an object can be achieved if the transport speed of traction means to traction means in the transport path increases.
  • the climb is to be seen here in the transport direction, ie generally from back to front.
  • a reliable measurement of a speed of an object in the release agent can be achieved if such traction means, which act on the object in the transport direction at the front, engage the object with a higher frictional torque than traction means which engage further behind the object. As a result, the objects are gripped the strongest at the front and pulled through the release agent.
  • An increasing frictional torque can be realized by an increasing pressure with which the traction means press on the object.
  • the friction torque increases in several different, preferably at least four different torque levels in the transport path, expediently from traction means to traction means.
  • a transport of objects with a defined transport speed at different speeds propulsion of the traction means can be achieved when the traction means attacking the object are pulled by the object in a freewheel.
  • a front of the object attacking and fastest running Gebombzip determine the transport speed of the article and further back arranged and slower driven transport pairs can run in a freewheel and so hold the object with only a small force, so that the foremost Switzerlandstoffschreib not or only very Slipping little on the object.
  • traction means which are arranged behind a respective foremost on the object traction means operable in a freewheel, in which they transported with the faster than their propulsion speed follow the object.
  • two successively arranged traction means can be driven at the same speed, so that many downstream traction means can be freewheeled without the object slips on the foremost two traction means.
  • a propulsion can be switched off. However, this requires a certain amount of control. This can be avoided if on the object attacking and running in the freewheeling traction means are further controlled with a propulsion speed.
  • the control with the slower propulsion speed does not disturb the pulling in the faster freewheel, so that can be dispensed with an interruption of the control of the propulsion.
  • the freewheel is thus operable with simultaneous propulsion, when the attacked item runs faster - the running speed is thus higher - than the propulsion.
  • traction means are each driven at a higher propulsion speed on one side of the object than the respectively opposite traction means, a shearing force is produced on the object. Two overlapping objects are thereby pushed together and separated.
  • speed sensors are present, which detect the running speed of the traction means. Based on the running speed can be determined how fast an object is transported through the release agent.
  • the location of an object in the separating means can be determined by a speed detection spatially resolved from traction means to traction means.
  • speed detection when two overlapping objects are arranged in the release agent.
  • the running speed of the traction means is their instantaneous speed of movement or rotational speed.
  • the speed sensors which are provided for detecting the speed of the traction means, may be part of the traction means, for example servomotors whose speed is sensed, or be separate from the traction means.
  • the sensor may be a sensor line having a plurality of sensor elements arranged along the transport path.
  • the sensor can be with electromagnetic Radiation in the visible or invisible area or be operated with ultrasound or otherwise work, eg capacitive or by scanning.
  • a transport speed of an object in the separating means is determined with the aid of the optical sensor. As a result, an actual speed of the object can be detected with high reliability.
  • Slippage of an object on a traction means can be detected when a detected by the optical sensor speed of the object is compared with the running speed of the traction means.
  • the length of an object which is arranged in the release agent or even before it is detected it can be determined how many traction means will attack or attack the object and which forces will be applied to it.
  • an article is divided into at least one front and one behind it, and traction means of one side are switched to a restraint mode as soon as the rear region has reached an intended position in the separating means. In this way, a stripping force on the object for stripping an overlapping object can be increased if the object to be transported has already been adequately captured by the release agent and thus safely transported on.
  • Switching into a restraint mode can be done by braking means of a side relative to the respective opposite traction means are braked or run backwards.
  • the splitting is done in the front and the rear area depending on an object characteristic.
  • the determination of a reliable gripping of the object can be made dependent on its length, thickness, speed or another size.
  • the restraint mode Before switching to the restraint mode, it is expedient to carry out a check as to whether the object has already been reliably gripped by one or more traction means which are not intended for switching to the restraint mode. This can be done, for example, by detecting an acceleration of the object and making a switch to the restraint mode dependent on the acceleration of the object.
  • the article may be divided into front, middle and rear regions, and traction means located in the central region may be switched to restraint. If no or little delay of the object is caused by this retention, the and / or further traction means can be switched to the retention mode.
  • the object directed to the device is achieved by a device of the aforementioned type, in which the process means according to the invention is provided to drive the traction means on one side of the article each with a higher propulsion speed than the respectively opposite traction means.
  • the propulsion speed is expediently controlled by the process means, which is provided for this purpose for controlling the traction means, each with a different propulsion speed.
  • the traction means each have their own drive and are individually controllable by the process means.
  • the traction means advantageously comprise servomotors, which are provided on the one hand for applying the propulsion speed to the traction means and their running speed can be tapped, so that in this way the running speed of the individual traction means can be detected.
  • the running speed can be advantageously detected even when the running speed is higher than the driving speed.
  • FIG. 1 shows a device 2 for separating objects 4 from a stack 6 in an article stream 8, which is transported by a further transport line 10 in the transport direction 12.
  • the items are flat postal items, especially letters, large letters, flats and magazines.
  • the device 2 comprises a withdrawal means 14 with a circulating belt 16 and a suction system 18 for sucking the articles 4 to the belt 16. From the belt 16, the respective adjacent object is transported in the transport direction 12 to a release agent 20 of the device 2, which - as well the withdrawal means 14 - is controlled by a processing means 22.
  • the processing means 22 may comprise an electronic data processing system and is prepared for carrying out individual or all described method steps by one or more corresponding data processing programs.
  • the separating means 20 comprises 24 pulling means 24 arranged in pairs opposite each other, each having a roller 26 for direct contact with an object 4 arranged in the separating means 20.
  • the traction means 24 are each driven by a servomotor, which can be used as a speed sensor 28 and whose measurement signal is read out by the processing means 22.
  • the separating means 20 comprises a sensor 30 for detecting a leading edge 32 and a trailing edge 34 of an object 4 arranged in the separating means 20.
  • the sensor 30 is constructed from a multiplicity of sensor elements 36 which are arranged along a transport path 38 through the separating means 20.
  • the optical sensor elements 36 are relative positioned to the traction means 24 so that their measuring beam past the traction means 24, for example by being arranged above or below them.
  • the separating means 20 may include sensors 40 for measuring a deflection of the traction means 24 from a rest position, so that from the deflection of the traction means 24 from its rest position, a thickness of the articles 4 can be estimated.
  • sensors 40 for measuring a deflection of the traction means 24 from a rest position, so that from the deflection of the traction means 24 from its rest position, a thickness of the articles 4 can be estimated.
  • sensors 40 for example, in FIG. 1 Twelve traction means 24 shown above fixed in position and the twelve traction means 24 shown below transversely to the transport direction 12 deflected so that they can be pushed by the objects 4 to the side. It is also conceivable that all traction means 24 are deflectable and, for example, provided with sensors 40.
  • the 24 traction means 24 are arranged in such a way that half of the traction means 24 are arranged on one side of the transport path 38 and the other half of the traction means 24 on the other side of the transport path 38. It is thus - as in FIG. 1 shown - on both sides of a withdrawn article 4 each twelve traction means 24 are arranged, of which more and more attack on each side of the article 4. In each case two traction means 24 are arranged exactly opposite each other, so that the connection of its axis of rotation is oriented perpendicular to the transport direction 12. In this case, the two traction means 24 of each pair of traction means are constructed identically in terms of their shape, so that they rest in each case with a same bearing surface on the object 4 clamped between them.
  • FIG. 2 shows the release agent 20 in a functional manner.
  • the sensor elements 36 it is shown in which the sensor elements 36 whose measuring beam is interrupted by at least one of the articles 4 embodied as postal items 42, 44.
  • the traction means 24 are individually distinguished by the reference numerals Z 1 - Z 12 and Z ' 1 - Z' 12 .
  • the traction means Z 1 - 2 '12 are so controlled by the processing means 22, that the foremost upper traction means Z 1 is driven at the propulsion speed v 1 , the following traction means Z 2 at the propulsion speed v 2 , the third traction means Z 3 at the propulsion speed v 3 , etc. up to the last traction means Z 12 , which is at the propulsion speed v 12 is driven.
  • the traction means Z " 1 - 2 '12 of the lower row are driven in an analogous manner, namely the foremost pulling means Z' 1 with the driving speed v ' 1 and so on until the last pulling means Z' 12 with the driving speed v" 12 .
  • the lower traction means Z ' 1 - Z' 12 are pressed with different spring pressure in the direction of the mailpieces 42, 44, so that the frictional torque of the mailpieces 42, 44 between the first, foremost pair of traction means Z 1 , Z ' 1 is greater as the frictional torque of the mail items 42, 44 to the next pair of traction means Z 2 , Z ' 2 , etc., lying thereunder, to the last pair of traction means Z 12 , Z' 12 , between which the mail items 42, 44 with the lowest frictional torque are guided.
  • the postal item 42 is impressed by the traction means Z ' 4 with a small shearing force, which pushes the underside of the item of mail 42 slightly to the rear.
  • this shearing force is low, since the free-running resistance of the traction means Z ' 4 is considerably lower than the frictional torque with which it would cause a propulsion of the mail piece 42.
  • the traction means Z 5 and Z ' 5 are pulled along, so that they run in the freewheel with the running speed v 4 .
  • the upper traction means Z 6 is also pulled along with the propulsion speed v 4 of the fourth traction means Z 4 and runs along.
  • the opposite traction means Z '6 is slower because all running in free running pulling means 2' 4 - Z '12 exert a retaining force on the lower mailpiece 44 and brake it.
  • the speed with which the mail item 44 is transported in the transport direction 12 is thus the advance speed v ' 6 of the traction mechanism Z' 6 which pulls the mail item 44 forward.
  • the more rearwardly arranged traction means Z ' 7 - Z' 12 again run in the freewheel with the propulsion speed v ' 6 , which is the running speed for them.
  • the advance speed v ' 7 to v' 12 thus differs from the currently applied freewheeling speed v ' 6 .
  • the respectively present driving speed or freewheeling speed of all traction means Z 1 -Z " 12 is measured in the corresponding speed sensors 28 of the separating means 20 or the traction means Z 1 -Z" 12 and detected by the processing means 22.
  • the processing means 22 Due to the different speeds at the tension means Z 1 to Z 'rest 12, the processing means 22 detects that the upper pulling means Z 4 - Z 10, a first mail item 42 and to the lower pulling means Z' is a second 6 to Z '12 Mailing 44 is present. Because it is overlapping mail 42, 44, it is recognized by the processing means 22 that one of the mailpieces 42, 44 must be retained in order to separate them from one another. Since the retarded of the mailpieces 42, 44 is expediently the postal item 44 arranged further back, the processing means 22 causes, for example, the stopping of the traction means Z ' 6 - Z' 12 .
  • This condition is in FIG. 3 shown.
  • the rear postal item 44 remains dormant in the release agent 20, whereas the front postal item 42 is driven further.
  • this mail item 42 as it progresses further through the separating means 20, first accelerates to the advancing speed v 3 , then to the advancing speed v 2 and finally to the fastest advancing speed v 1 , the respective following traction means Z 4 - Z 9 , Z 3 - Z 8 , Z 2 - Z 7 are freewheel with the respective running speed v 3 , v 2 , v 1 pulled along.
  • the upper traction means Z 6 - Z 12 are also set with their propulsion speed to zero, so that the rear postal item 44 is kept in position.
  • the front postal item 42 is transported away to the front.
  • a gap is formed which is detected by at least one of the sensor elements 36, as in FIG FIG. 3 is shown.
  • the item of mail 42 is categorized individually by the processing means 22 and transported away.
  • the following mail item 44 can be started immediately for further transport. However, the gap between the mailpieces 42, 44 must reach a minimum size. If the trailing edge 34 is sufficiently far forward and the gap sufficiently large, the traction means Z 6 to Z '12 are driven and the rear postal item 44 is transported in the transport direction 12, with increasing transport speed and constant shear forces between the top and bottom of the mailing 44.
  • the second postal item 44 it is also possible to immediately move the second postal item 44 at the same speed, that is, v 1 , connected to the shear forces associated with the freewheel. In this way, a high throughput can be achieved by the release agent 20. The throughput can be further increased if the resulting gap between the mail items 42, 44 is reduced to a minimum gap. This can be done by transporting the rear postal item 44 at a speed v which is higher than the speed v 1 with which the front postal item 42 is transported away, until the gap has contracted to minimum size. The size of the gap is monitored by the sensor 30.
  • another mail item 48 is clamped completely invisibly from the outside between the mailpieces 42, 44.
  • the processing means 22 registers based on the different running speeds v 8, v '8 at the tension means Z 9 - Z' 12, that there must be at least two postal items 42, 44, which are arranged to overlap in the release agent 20th Accordingly, the traction means Z " 8 to 2 '12 are stopped, as in FIG. 5 is shown.
  • the upper traction means Z 1 to Z 12 run first with their propulsion speed v 1 to v 12 and the corresponding higher speed, at the time as in FIG. 5 represented with the running speed v 5 .
  • a gap between the mailpieces 42, 44 is detected, as in FIG. 6 is shown. If the gap between the mailpieces 42, 44 is sufficiently large and the trailing edge 34 is sufficiently far forward, further transport of the mail item 44 is initiated. As a result, however, that the coated propulsion speeds of the lower traction means Z 8 - Z 12 are less than the uncoated propelling speeds of the upper traction means Z 8 - Z 12 , a shear force is applied to the two mail items 44, 48. As a result, the upper postal item 48 is transported to the front faster than the lower postal item 44.
  • the process means 22 can determine on the basis of the measurement results that there are two mail items 44, 48 in the release agent 20. First of all, the two mail items 44, 48 move at different speeds through the separating means 20, as is the case FIG. 2 described. In addition, the leading edge 32 of the mail piece 48 eventually moves forward more rapidly than the trailing edge of the mail piece 44. This obscures an increasing number of sensor elements 36, which would be impossible with a single mail piece 44. As a result, the process means 22 recognizes the presence of two overlapping mailpieces 44, 48 in the release agent 20.
  • the process means 22 recognizes that at a position of the mailpieces 44, 48, as in FIG. 6 shown, the last upper traction means Z 12 is no longer entrained with the running speed v 7 , whereas the last lower traction means Z '12 is very well still entrained with the running speed v' 7 . This is only possible with two overlapping mailpieces 44, 48. Thus, an overlapping of mailpieces 44, 48 can also be detected from the monitoring of the running speeds.
  • the middle postal item 48 remains hanging on the upper, front postal item 42 and is transported by it.
  • the rearmost mail piece 44 is stopped, as to FIG. 5 described, and the other two mail items 42, 48 are transported forward. Since the traction means Z ' 5 - Z' 8 retain the under postal item 48, it is transported at the lower forward speed v ' 5 than the upper postal item 42, which is transported at the advancing speed v 4 .
  • the process means 22 recognizes on the one hand that it involves two separate postal items 42, 48 and, on the other hand, that the upper postal item has already reached the fourth pair of traction means Z 4 , Z ' 4 , and the concealed lower postal item 48 only at the fifth traction means Z ' 5 has arrived.
  • the process means 22 now causes that the lower traction means Z ' 5 - Z' 7 are stopped, so that the lower mail piece 48 is stopped. If the mail item 42 is transported away, then the six traction means Z 5 - Z ' 7 are driven with their corresponding advancing speeds v 5 - v' 7 and thereby the item of mail 48 alone is transported further forward, provided with a shearing force, possibly a further unrecognized item of mail to identify.
  • FIGS. 8-11 Such an example is shown with reference to FIGS. 8-11.
  • the two postal items 42, 44 are transported into the release agent 20 without the presence of two separate postal items 42, 44 would be recognizable, as in FIG. 8 is shown.
  • the lower traction means Z ' 9 - Z' 12 exert a retention torque on the lower postal item 44, so that this would have to be transported at the advance speed v ' 9 , however, a hooking 50 prevents the item of mailing 44 from moving relative to the postal item 42 moves behind.
  • the processing means 22 switches to the in FIG. 9 shown driving speeds v 1 - v 12 and v ' 1 - v' 12 so that now the upper traction Z 1 - Z 12 with the smaller coated driving speeds and the lower traction Z ' 1 - Z' 12 with the larger uncoated Driving speeds are driven. In this way, it can be effected that the lower postal item 44 is pushed forward relative to the upper postal item 42, so that the entanglement 50 can be released.
  • the process means 22 therefore controls the lower traction means Z ' 4 - Z' 10 successively for a short time with a particularly fast propulsion speed v S.
  • the traction means Z ' 4 is driven with this high propulsion speed v S , so that the whole package from the two mail items 42, 44 is transported at this high propulsion speed v S.
  • this step can be omitted since it would only be effective if both mail items 42, 44 were clamped between the fourth pair of traction means Z 4 , Z ' 4 . In this case, switching from the coated to the uncoated driving speeds and vice versa would already be sufficient.
  • the process means 22 ensures that no gaps are completely closed in order to avoid collisions to the rear and thus possible damage to the mail.
  • the lower mail piece 44 is transported away to the front, wherein the different propulsion speeds of the traction means Z 1 - Z ' 3, for example, to FIG. 3 described shear effect is applied to the mail piece 44, so that any further hidden mail item would be separated from this.
  • the upper traction means Z 4 - Z 12 are driven at the slow return speed -V 13 , whereas the lower traction means Z ' 4 - Z' 12 are subjected to a slow advance.
  • the traction means Z ' 5 - Z' 12 Due to the freewheeling function, in this case in the direction opposite to the transport direction 12, the traction means Z ' 5 - Z' 12, however, run backwards, but exert a shearing force on the mail piece 42, so that a mail item possibly further hidden behind it is forward would be transported and recognized.
  • FIG. 12 shows a further embodiment, in the first of the embodiment FIG. 2 is assumed.
  • the upper mail piece 42 is here so heavy or so smooth that it is not properly gripped by the two traction means Z 4 , Z ' 4 , but slips slightly between these two traction means Z 4 , Z' 4 .
  • the mail item 42 is not transported at the propulsion speed v 4 , but only at the somewhat slower propulsion speed v 5 of the fifth upper traction mechanism Z 5 .
  • the transport speed of the mail piece 42 is monitored by means of the movement speed of the front edge 32 of the mail piece 42 with the aid of the sensor elements 36. From this, the process means 22 recognizes that the front edge 32 moves forward only at the transport speed v 5 , and therefore the front part of the mail piece 42 is not gripped without any doubt by the two traction means Z 4 , Z ' 4 .
  • FIG. 13 shows a starting situation analogous to FIG. 2 .
  • the propulsion speed of the sixth upper traction means Z 6 is temporarily switched from the freewheeling speed v 4 to a lower propulsion speed v 6 , the freewheeling of the sixth traction means Z 6 is thus canceled out at short notice.
  • this traction means Z 6 brings a high frictional torque and thus a greater braking force to the mail piece 42 than only the traction means Z 5 - Z 10 running in the freewheel.
  • this postal item 42 is measured, namely on the basis of the sensor elements 36 and additionally on the basis of the free-running pulling elements Z 5 , Z 7 , Z 8 , etc. If it is determined that the postal item 42 is decelerating, this is not yet strong enough in the frontmost one Anlagenstoffpas Z 4 , Z ' 4 gripped and the increased braking torque of the traction means Z 6 is canceled and applied again to a further test on the mail piece 42 after a predetermined waiting time. If it is determined that the postal item 42, despite the increased braking torque unchanged with the correct propulsion speed, in the example of FIG. 13 with v 4 , is transported, so further traction Z 7 , Z 8 , etc.
  • the lower traction means Z ' 6 , Z' 7 , 2 ' 8 , etc. are switched in a restraint mode by their freewheel canceled and brought an increased braking torque on the overlapping mailpiece 44 and possibly existing mail, and these can safely from the front Mailing 42 are separated.
  • FIGS. 14 and 15 A more detailed embodiment of this method is in FIGS. 14 and 15 shown.
  • the length of the mail piece 42 is detected, for example on the basis of the sensor elements 36 or on the basis of the deflection sensors 40 or other sensors.
  • the mail piece 42 is divided by the processing means 22 into a front region 52 and a rear region 54 and optionally additionally into a central region 56.
  • the mail piece 42 is retracted into the separating means 20, such as for example FIG. 2
  • the uncoated propulsion speeds are greater than the coated propulsion speeds.
  • FIG. 16 A flowchart of the method is shown in FIG. 16 shown.
  • a mail item 42 is transported in the transport function 60 in the separating means 20.
  • a thickness of the mailpieces 42, 44 may be considered. Since the thickness of the mailpieces 42, 44 generally corresponds to their weight and thus to their inertia, a thicker mail item 42, 44 must usually be gripped better than a thinner mail item 42, 44. However, inclusion of the thickness described here can also be used be dispensed with, since the test procedure alone is reliable.
  • the thickness of the mail piece 42 or of a plurality of mailpieces 42, 44 can therefore optionally be detected by means of the sensors 40 on the basis of the deflection of the lower traction means Z ' 1 - Z' 12 .
  • an assignment 62 in which a number of Switzerlandstoffschreiben, between which the mailpiece must be 42, the corresponding mailing thickness is assigned.
  • the assignment may look like this, for example: Broadcast thickness [mm] Number of pairs of traction means ⁇ 1 1 1 1 2 2 3 2 4 2 5 2 6 3 7 3 8th 3 9 4 10 4 > 10 5
  • the thickness of the mail piece 42 is below 1 mm, then it is sufficient for the mail piece 42 to have been detected by a traction means pair which is downstream of the selected pair of traction means which performs a retention. In the example off FIG. 14 is therefore sufficient if the mail item 42 would be detected by the two traction means Z 9 , Z ' 9 .
  • the mailing thickness is between 5 mm and 6 mm, then the mail item must be covered by at least two traction means pairs located downstream. With a mailing thickness of more than 6 mm, the postal item 42 must be covered by three pairs of pulling means in order to be reliably gripped.
  • the retention mode is only then switched on as a test basis and the selected pair of traction means, in the example, off FIG. 14 the traction means the Z 10 and Z 10 , switched to the retention mode.
  • the query 64 it is determined whether the postal item 42 has already been detected by at least as many Wergoen as was assigned in the assignment 62 of the shipment thickness. If this is the case, the retention test 66 can take place.
  • a gap in front of the mail item 42 has reached at least a minimum size. This query is necessary in order to provide the postal item 42 with a necessary distance to a possibly preceding item of mail, so that at least a minimal gap between the items of mail is set. If the minimum gap or a larger gap exists, then the mail item 42 can be transported further, so that after the corresponding query 68, the transport function 60 is switched over again. If the minimum gap is not reached, the mail item 42 must be braked in any case and it is switched to the restraint test 66.
  • a query 70 determines whether the transport speed of the postal item 42 is constant. If this is the case, then it can be switched to the full restraint mode 72.
  • the retention mode 42 is maintained for a predetermined period of time or maintained until the mailpiece 42 has left the restrained pair of traction means. If the shipment speed is not constant, that is, the retention test 66 is negative, the process is returned to the transport function 60, and the mailpiece 42 is transported on for a predetermined period of time.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sorting Of Articles (AREA)
  • Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
  • Controlling Sheets Or Webs (AREA)
  • De-Stacking Of Articles (AREA)
EP09153489.1A 2008-02-28 2009-02-24 Procédé et dispositif de séparation d'objets Not-in-force EP2096056B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008011651 2008-02-28
DE102008014676A DE102008014676A1 (de) 2008-02-28 2008-03-18 Verfahren und Vorrichtung zum Vereinzeln von Gegenständen

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EP2096056A2 true EP2096056A2 (fr) 2009-09-02
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EP2096056B1 EP2096056B1 (fr) 2017-08-16

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3961786A (en) 1975-06-23 1976-06-08 International Business Machines Corporation Self clearing roller feed assembly for document feed apparatus
US4451027A (en) 1980-01-09 1984-05-29 Burroughs Corp. Constant spacing document feeder
DE102004037422B3 (de) 2004-07-30 2006-03-09 Siemens Ag Vereinzelungsstrecke für überlappte flache Sendungen in stehender Position

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4050690A (en) * 1976-09-16 1977-09-27 Ncr Corporation Document separator mechanism
US6644660B2 (en) * 2001-10-26 2003-11-11 Pitney Bowes Inc. Dynamic pitch correction for an output inserter subsystem
JP4342249B2 (ja) * 2003-09-01 2009-10-14 株式会社東芝 紙葉類分離搬送装置
JP4184904B2 (ja) * 2003-09-03 2008-11-19 株式会社東芝 紙葉類分離搬送装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3961786A (en) 1975-06-23 1976-06-08 International Business Machines Corporation Self clearing roller feed assembly for document feed apparatus
US4451027A (en) 1980-01-09 1984-05-29 Burroughs Corp. Constant spacing document feeder
DE102004037422B3 (de) 2004-07-30 2006-03-09 Siemens Ag Vereinzelungsstrecke für überlappte flache Sendungen in stehender Position

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EP2096056B1 (fr) 2017-08-16

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