EP2731735B1 - Extraction device for a machine for sorting flat objects, and method for extracting flat objects - Google Patents
Extraction device for a machine for sorting flat objects, and method for extracting flat objects Download PDFInfo
- Publication number
- EP2731735B1 EP2731735B1 EP12714811.2A EP12714811A EP2731735B1 EP 2731735 B1 EP2731735 B1 EP 2731735B1 EP 12714811 A EP12714811 A EP 12714811A EP 2731735 B1 EP2731735 B1 EP 2731735B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- flat
- unstacking
- nominal
- specialized
- default
- 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
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Classifications
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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
- B07C1/00—Measures preceding sorting according to destination
- B07C1/02—Forming articles into a stream; Arranging articles in a stream, e.g. spacing, orientating
- B07C1/04—Forming a stream from a bulk; Controlling the stream, e.g. spacing the articles
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- 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
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- 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
- B65H7/18—Modifying or stopping actuation of separators
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- 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
- B65H2511/20—Location in space
- B65H2511/22—Distance
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- 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
- B65H2511/40—Identification
- B65H2511/414—Identification of mode of operation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2515/00—Physical entities not provided for in groups B65H2511/00 or B65H2513/00
- B65H2515/10—Mass, e.g. mass flow rate; Weight; Inertia
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2515/00—Physical entities not provided for in groups B65H2511/00 or B65H2513/00
- B65H2515/81—Rigidity; Stiffness; Elasticity
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- 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 generally relates to an unstacking device for a flat object sorting machine, configured to accept flat objects in stack and to output said flat objects in series, separated from each other by a predetermined distance, said device unstacking device comprising at least first detection means adapted to detect the transition between an object N of a first specialized type of objects or of a type of objects by default and an object N + 1, consecutive, respectively of a second or first specialized type of object; a first dedicated unstacking program and a second specialized unstacking program, each adapted to maintain respectively a first nominal and a second nominal difference between two consecutive flat objects; a control / command unit capable of automatically executing one of said first and second specialized unstacking programs according to the type of objects detected.
- the invention also relates to a method of unstacking flat objects during which stacked flat objects are accepted at the entrance, a step of "unstacking" the flat objects is carried out in order to restore at output said series flat objects separated by a predetermined deviation, a "transition detection” step is performed during which the transition between an object N of a first specialized type of objects or of a type of objects by default and an object N + is detected. 1 consecutive and respectively of a second or first specialized type of objects, said predetermined difference is respectively modified according to the type of detected objects to apply a first nominal difference or a second corresponding nominal difference.
- the current flat object sorting machines are commonly used to manage the flow of flat objects of various types such as for example letters, postcards, open magazines, mail packed in a plastic material.
- the spectrum of types of objects to be unstacked and conveyed is often wide.
- These sorting machines incorporate guide means and various means for moving flat objects such as belt conveyors, for example perforated strips coupled to a suction chamber, conveyors with clamped belts.
- the physical, dimensional and material characteristics of these flat objects are very different from one type of object to another. These features have a noticeable impact on how flat objects of each type of object can be moved.
- the behavior of the flat objects in the conveying means is very different from one type of objects to another, some flat objects tend to be more sluggish than others.
- the publication EP 2 165 775 describes an unstacking device for flat objects sorting machine whose input receives homogeneous batches of flat objects to be sorted and distributed in a plurality of outlets, for example as a function of the successive delivery points.
- Each homogeneous batch of flat objects comprises flat objects having in common a dimensional and / or physical and / or material parameter.
- the sort is obtained in one or more often several passes.
- This unstacking device comprises sensors capable of detecting and recognizing the type of objects of the batch occurring at the entrance of the unstacking device, automatically and according to the type of objects recognized, adapting one of the operating parameters.
- the unstacking device such as the speed of displacement of said flat object, the distance between two flat objects, the acceleration ramp, the vacuum level in the suction chamber, the tripping time of a device multiple shots.
- detection means are particularly able to recognize plastic packaging, magazines connected by means of metal staples.
- a homogeneous batch can comprise a single flat object.
- the setting of the operating parameters of this unstacking device may vary from one flat object to another. This kind of unstacking device nevertheless has a limited flow.
- the object of the invention is to overcome these disadvantages by proposing a device and a method of unstacking flat objects to take into account the different types of objects, anticipating the risk of variation of gap between flat objects, while optimizing the unstacking rate.
- the object of the invention is also to propose a device and an unstacking method making it possible, in addition to taking into account different types of objects, to adapt the treatment of each object according to the specificities of this object within the type of objects to which it belongs, in particular to preserve the integrity of each flat object.
- gap here we mean the space without a flat object separating the downstream part of a first flat object and the upstream part of a second flat object following it according to the direction of movement of the flat objects.
- the unstacking device according to the invention makes it possible to effectively detect the transitions between types of depilated objects. Adjustment changes occurring only after confirmation of the need for these changes in setting obtained by reaching a predetermined threshold, the unstacking device according to the invention makes it possible to optimally adapt the differences between the objects. dishes with the risk of error.
- the invention also relates to a method of unstacking flat objects in which flat objects arranged in a stack are accepted at the entrance, a step of "unstacking" flat objects is carried out and said flat objects in series are outputted. separated by a predetermined distance, a "transition detection” step is performed during which the transition between an object N of a first specialized type of objects or of a type of objects by default and an object is detected.
- said predetermined difference is respectively modified according to the type of detected objects to apply a first nominal difference or a second corresponding nominal difference, characterized in that after detecting a transition, said flat objects are de-stained with a nominal nominal deviation different from said first and second nominal deviations, in that during a step "incrementation counter the said flat objects subsequent to the said transition are counted, in that during a step "verification threshold counting reached", the attainment by said count of a predetermined counting threshold is checked and, when said counting threshold is reached, until the next "transition detection", said subsequent flat objects are de-stained with said first, second nominal deviation corresponding to the detected object type.
- the difference between at least one characteristic is detected.
- the predetermined physical value of said punctured flat object and the predetermined nominal value of said physical characteristic for said corresponding specialized type of objects and in that during a "program modulation” step, the predetermined modulus is modulated as a function of this difference detection, said corresponding nominal difference respectively in said specialized unstacking program or by default.
- the flat objects sorting machine 1 comprises an unstacking device 2, conveying means 3 and sorting outlets 4, 4 ', 4 ".
- the unstacking device 2 receives flat objects 5
- the flat objects 5 are unstacked in a manner known to those skilled in the art and, at the outlet of the unstacking device 2, they are separated from each other with a predetermined distance to be moved in series on edge.
- the conveying means 3 comprise in particular a "closed" type belt conveyor, forming a loop along which the sorting outlets 4 are distributed, thus, once unstacked, the flat objects 5 are conveyed to the sorting outlets 4 according to a predetermined sorting logic.
- the direction of movement of the flat objects 5 on the belt conveyor is shown schematically by the arrows F. It is understood that the invention also applies to any machine for sorting flat objects whose conveyor is of the "open" type. and does not form a closed loop.
- the transitions can be known from the previous sorting pass during which a list can be established.
- the list includes objects and their corresponding object types.
- the detection means integrate this preset list.
- the transitions can be known in advance, for example by means of a list associated with each stack of flat objects, communicated by the transmitter of the batch containing the stack of objects. dishes. Like the previous one, this list may include the objects and their corresponding object types. In this case also, the detection means integrate this preset list.
- the detection of the specialized type of objects can be sequential and relative in the sense that the transition between a specialized type of previously detected objects and the specialized type of objects currently detected is detected.
- the detection step may thus comprise detecting sub-steps as described below. For example, during a first detection sub-step, it is checked whether the flat object to be unstacked belongs to the fourth specialized type of object (flat items packaged in plastic) by detecting the material of its external faces. If this material is plastic and not paper, the flat object 5 is assigned to the fourth specialized type of object (flat items wrapped in plastic) and stripped with a fourth nominal gap separating the consecutive flat objects 5.
- the flat object 5 to be unstacked is assigned to the third specialized type of objects (magazines with staple (s)) and depilated with a third nominal gap separating the consecutive flat objects 5.
- the flat object 5 to be unstacked is assigned to the second specialized type of object (large flat paper sizes) and depilated with a second nominal gap separating the consecutive flat objects 5.
- the flat object 5 being unstacked is assigned to the first specialized type of objects (small flat paper sizes) and depilated with a first nominal gap separating the consecutive flat objects 5.
- the specialized types of objects may be predetermined according to criteria other than those described and that the detection sequence may be different.
- specialized types of objects can be more or less numerous.
- the first detection means 11 thus make it possible to detect any transition between the type of a flat object N depilated and the type of a flat object N + 1 subsequent to unstacking. As described later, this transition detection is used to adapt the operation of the unstacking device 2 and in particular the predetermined distance separating the consecutive flat objects according to their physical characteristics and the risks of slipping and offsets inherent to these physical characteristics.
- the first detection means 11 comprise for example a material sensor, a camera or any other suitable known means.
- the first detection means 11 may also be arranged facing the extraction slot 10 above the stack of flat objects 5.
- the unstacking device 2 further comprises a control / command unit (not shown) which automatically executes various unstacking programs respectively adapted to the different specialized types of objects detected by the first detection means 11.
- a first unstacking program The specialist is able to maintain a predetermined first predetermined difference between two consecutive flat objects belonging to the first specialized type of object (small flat paper sizes), for example 100 mm;
- a second specialized unstacking program is able to maintain a second predetermined nominal difference between two consecutive flat objects belonging to the second specialized type of objects (flat large format paper mailpieces), for example 150 mm;
- a third specialized unstacking program is able to maintain a third predetermined nominal gap between two consecutive flat objects belonging to the third specialized type of objects (magazines with staple (s)), for example 200 mm;
- a fourth specialized unstacking program is able to maintain a fourth predetermined nominal deviation between two consecutive flat objects belonging to the fourth specialized type of objects (magazines), for example 250 mm
- a default unstacking program is able to maintain a predetermined default nominal deviation between two consecutive flat objects 5 belonging to no specialized type of object, for example 300 mm. As described later, this default unstacking program will be used as a "safe haven" program when the flat objects have different features, and also at each transition.
- the control / command unit executes the default unstacking program and counts the subsequent flat objects upon detection of the transition. If another transition is detected, the counter is reset and counting resumes.
- the control / command unit executes the corresponding first, second, third or fourth dedicated unstacking program.
- the control / control unit executes the default unstacking program and strips the flat objects separated by the nominal deviation.
- the predetermined distance separating two flat objects 5 is adapted to the specialized type to which the objects depilated and the flat object to be depilated correspond.
- Each dedicated unstacking program and default unstacking program also correspond to operating parameters having specific predetermined values. These operating parameters are for example the speed of displacement of the flat object 5, the angle of the flat object 5 on edge, the position and the pressure of a blow applied on the flat object 5, the depression of An aspiration applied to the flat object 5.
- the adjustment of the angle of the flat object 5 on edge is obtained for example by varying separately the advance and the retreat of the instep 6 and the pallet 8 .
- Each type of object can correspond to different physical characteristics of the flat objects 5, for example characteristics of dimensions, stiffness, thickness, weight. So inside of a same specialized type of object, these physical characteristic values may vary.
- the control / command unit is arranged to store a nominal value for each of these physical characteristics, this nominal value being predetermined depending on the type of objects to which the flat objects belong. Each nominal value can also be a range of values.
- the unstacking device 2 comprises second detecting means 12 capable of detecting, for a specialized type of object, whether one of the predetermined physical characteristics of the flat object depilated is different from the predetermined nominal value. In the event of a difference, the control / control unit modulates, in a predetermined way, the operating parameters of the unstacking program used and therefore the nominal difference between two consecutive flat objects 5 depilated.
- the unstacking device 2 as described above can advantageously be coupled with one or more other unstacking devices 2 similar or different.
- the control / control unit executes the default unstacking program with the corresponding operating parameter settings, so that between two consecutive flat objects 5 default nominal deviation.
- This default nominal deviation for example 300 mm, is suitable for all types of objects.
- the default unstacking program is therefore a "haven" unstacking program for unstacking flat objects 5 with a default nominal deviation avoiding jamming and multiple gripping problems regardless of the type of flat objects unstacked.
- This default unstacking program is suitable for the worst cases. However, it does not achieve optimal performance of the unstacking device 2, hence the interest of specialized unstacking programs operating with lower nominal deviations and allowing the unstacker device 2 to achieve higher yields.
- the first detection means 11 are used to check whether the flat object 5 depicted belongs to one of the specialized types of objects.
- the flat object 5 to be unstacked is detected as being of a specialized type of objects different from the type of objects corresponding to the active unstacking program, then the process is continued by the 'step of checking active default program?' 23 during which it is checked whether the active unstacking program is the default unstacking program.
- a "default unloading program activation" step 24 is performed during which the default unstacking program is activated.
- the "default program activation” step 24 is followed by a "counter reset” step 25 during which the counter is reset to zero.
- step "incrementation counter" 26 is performed during which, at each flat object 5 to be unstacked, subsequent to the detection of the transition and which corresponds to the specialized type of detected objects, the counter is incremented by one. unit.
- step "check counting threshold reached” 27 it is checked whether the number of flat objects 5 counted, of the specialized type of objects detected after the transition, is equal to the predetermined counting threshold, for example of three flat objects 5 counted.
- the unstacking process is continued by the "special program activation" step 28 during which the control / command unit switches from the default unstacking program to one of the programs. specialized unstacking.
- the control / command unit changes the gap between the consecutive flat objects 5 depilated and optionally one or more of the other operating parameters of the unstacker 2 as described below.
- a "difference detecting" step 29 is performed in which the second detecting means 12 is used to check whether the predetermined physical characteristics of the pared flat object correspond to the nominal values provided by the special unstacking program. .
- These physical characteristics are, for example, the dimensions, the rigidity, the thickness, the weight of the flattened flat object.
- the difference detection may relate to one or more of these physical characteristics.
- the unstacking process is continued by the "program modulation" step 30 during which one or more operating parameters of the unstacking device 2 are modulated, in a predetermined manner, as a function of the difference in physical characteristic detected. It is thus possible, for example, to modulate one or more of the following parameters: the speed of displacement of the flat object 5, the angle of the flat object 5 on edge, the position and the pressure of a blow applied on the flat object 5, the depression of a suction applied to the flat object 5.
- step "check count threshold reached” 27 If during the step "check count threshold reached" 27, the predetermined threshold is not reached, the unstacking process is continued by the step “detection difference" 29 as previously described.
- the flat object 5 to be unstacked is of the same type of objects as that corresponding to the unstacking program that is active and in use, then the process is continued by the step "incrementation counter" 26 previously described.
- the previously described steps are individually controlled by the control / command unit.
- FIGS. 4 and 5 illustrate in simplified manner two operating sequences of the unstacking process according to the invention.
- the upper part represents the state of the stack of flat objects presented at the entrance of the unstacking device
- the lower part graphically illustrates the stages of "transition detection” 22 and “verification threshold counting reaches “29, as well as switching between the various default and specialized unstacking programs.
- the direction of advance of the flat objects is illustrated by the arrow F.
- the "difference detection" step 23 is not shown in these figures.
- the flat objects of the first stacked objects 51 are of a non-predetermined type of objects.
- the control / control unit therefore executes the default unstacking program according to the "default program activation" steps 20 and 24.
- the flat objects are unstacked, separated by a nominal deviation by default.
- the first period of time L01 extends until the detection of a transition.
- the control / command unit continues to execute the program. by default unstacking the separated flat objects by default nominal deviation for a second period of time L02.
- the second period of time L02 extends until reaching the counting threshold or a new transition detection.
- the control / command unit executes the first specialized unstacking program.
- the control / control unit strips the flat objects, separated by a first nominal difference, this first nominal difference being different and preferably less than the nominal nominal deviation.
- the third period of time L03 extends to any new transition detection.
- the control unit / command executes the default unstacking program for a fourth period of time L04 until the corresponding threshold is reached.
- the control / control unit strips the flat objects with the nominal deviation by default.
- the control / control unit executes the second specialized unstacking program.
- the control / control unit strips the separated flat objects by a second nominal difference, this second nominal difference being different from the nominal nominal difference and the first nominal difference and preferably lower. the default nominal deviation.
- the fifth time period L05 extends to any new transition detection.
- the control / control unit executes the default unstacking program for a sixth period. time L06 until the corresponding threshold is reached.
- the control / control unit strips flat objects with the nominal nominal deviation. Since the objects of the fourth object packet 54 do not belong to any of the predetermined specialized object types, the operation according to the default unstacking program is extended until any new transition detection.
- the flat objects of the first object packet 501 are of a non-predetermined object type.
- the control / control unit therefore executes the default unstacking program according to the "default program" steps 20 and 24 by unsticking the separated flat objects by a nominal nominal deviation.
- the first period of time L11 extends until the detection of a transition.
- the control / command unit continues to execute the default unstacking program.
- the flat objects continue to be unstacked, separated by the nominal deviation by default.
- the second period of time L12 extends until the detection of a transition. Then, when in the "transition detection” step 22, the first flat object of a third object packet 503 belonging to a second specialized type of object is detected the control / command unit continues for a third time. L13 time period to run the default unstacking program by unstacking flat objects, separated by the nominal deviation by default. The third period of time L13 extends until the predetermined count threshold is reached or the detection of a new transition. In the illustrated example, when in the "transition detection” step 22, the first object of a fourth object packet 504 belonging to a third specialized type of object is detected the continuous control / command unit. executing the default unstacking program for a fourth period of time L14.
- the fourth period of time L14 extends until the predetermined count threshold is reached or the detection of a new transition.
- the control / command unit continues to execute the default unstacking program.
- the control / command unit continues to run the default unstacking program for a fifth time period L15.
- the fifth time period L15 extends until the predetermined count threshold is reached or the detection of a new transition.
- the control / command unit executes the second specialized unstacking program, in particular according to the "modulation" step. 25.
- the control / command unit executes the second specialized unstacking program, in particular according to the "modulation" step. 25.
- the control / command unit executes the second specialized unstacking program, in particular according to the "modulation" step. 25.
- flat objects are unstacked, separated by a second nominal gap.
- the sixth period of time L16 extends until the detection of a new transition.
- the control / command unit runs the default unstacking program.
- the flat objects are unstacked, separated by the nominal deviation by default.
- the seventh time period L17 extends until the predetermined count threshold is reached or the detection of a new transition.
- the control / command unit executes the first specialized unstacking program in accordance in particular with the "program modulation" step.
- the flat objects are unstacked, separated by a first nominal gap.
- the eighth time period L18 extends until the detection of a new transition.
- the control / control unit executes the default unstacking program for a ninth period of time. time L19.
- the ninth time period L19 extends to reaching the predetermined count threshold or the detection of a new transition.
- the objects of the seventh pack of objects 507 not belonging to a specialized type of object, the operation according to the default unstacking program is extended by the control / command unit and the flat objects are unstacked, separated by the nominal deviation by default.
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Description
L'invention concerne de façon générale un dispositif de dépilage pour machine de tri d'objets plats, configuré pour accepter en entrée des objets plats en pile et restituer en sortie lesdits objets plats en série, séparés entre eux par un écart prédéterminé, ledit dispositif de dépilage comprenant au moins des premiers moyens de détection aptes à détecter la transition entre un objet N d'un premier type spécialisé d'objets ou d'un type d'objets par défaut et un objet N+1, consécutif, respectivement d'un second ou premier type spécialisé d'objets ; un premier programme de dépilage spécialisé et un second programme de dépilage spécialisé, chacun apte à maintenir respectivement un premier écart nominal et un second écart nominal entre deux objets plats consécutifs ; une unité de contrôle/commande apte à exécuter automatiquement l'un desdits premier et second programmes de dépilage spécialisés selon le type d'objets détectés.The invention generally relates to an unstacking device for a flat object sorting machine, configured to accept flat objects in stack and to output said flat objects in series, separated from each other by a predetermined distance, said device unstacking device comprising at least first detection means adapted to detect the transition between an object N of a first specialized type of objects or of a type of objects by default and an object N + 1, consecutive, respectively of a second or first specialized type of object; a first dedicated unstacking program and a second specialized unstacking program, each adapted to maintain respectively a first nominal and a second nominal difference between two consecutive flat objects; a control / command unit capable of automatically executing one of said first and second specialized unstacking programs according to the type of objects detected.
L'invention concerne également un procédé de dépilage d'objets plats au cours duquel on accepte en entrée des objets plats disposés en pile, on réalise une étape de "dépilage" des objets plats pour restituer en sortie lesdits objets plats en série séparés par un écart prédéterminé, on réalise une étape de "détection de transition" au cours de laquelle on détecte la transition entre,un objet N d'un premier type spécialisé d'objets ou d'un type d'objets par défaut et un objet N+1 consécutif et respectivement d'un second ou premier type spécialisé d'objets, on modifie ledit écart prédéterminé respectivement selon le type d'objets détecté pour appliquer un premier écart nominal ou un second écart nominal correspondant.The invention also relates to a method of unstacking flat objects during which stacked flat objects are accepted at the entrance, a step of "unstacking" the flat objects is carried out in order to restore at output said series flat objects separated by a predetermined deviation, a "transition detection" step is performed during which the transition between an object N of a first specialized type of objects or of a type of objects by default and an object N + is detected. 1 consecutive and respectively of a second or first specialized type of objects, said predetermined difference is respectively modified according to the type of detected objects to apply a first nominal difference or a second corresponding nominal difference.
Les machines de tri d'objets plats actuelles sont couramment utilisées pour gérer les flux d'objets plats de divers types tels que par exemple des lettres, cartes postales, magazines ouverts, courrier emballé dans un matériau plastique. Le spectre des types d'objets à dépiler et convoyer est souvent large. Ces machines de tri intègrent des moyens de guidage et différents moyens de déplacement des objets plats tels que notamment des convoyeurs à bandes, par exemple des bandes perforées couplées à une chambre d'aspiration, des convoyeurs à courroies pincées. Les caractéristiques physiques, dimensionnelles et de matière de ces objets plats sont très différentes d'un type d'objets à un autre. Or ces caractéristiques ont un impact notable sur la façon dont les objets plats de chaque type d'objets peuvent être déplacés. Ainsi, le comportement des objets plats dans les moyens de convoyage est très différent d'un type d'objets à l'autre, certains objets plats ayant tendance à être plus ralentis que d'autre. Cette différence peut être accentuée en fonction du type de convoyeurs utilisés. C'est particulièrement le cas pour les convoyeurs à courroies pincées de grandes longueurs et formant des virages. Avec le ralentissement de certains objets plats, l'écart entre objets plats de différents types a tendance à varier au fil du déplacement des objets plats, ce qui risque de provoquer des bourrages et/ou des rattrapages de deux objets plats consécutifs. Il est donc important que ces machines de tri intègrent des dispositifs de dépilage aptes à gérer de manière optimale les écarts entre objets plats.The current flat object sorting machines are commonly used to manage the flow of flat objects of various types such as for example letters, postcards, open magazines, mail packed in a plastic material. The spectrum of types of objects to be unstacked and conveyed is often wide. These sorting machines incorporate guide means and various means for moving flat objects such as belt conveyors, for example perforated strips coupled to a suction chamber, conveyors with clamped belts. The physical, dimensional and material characteristics of these flat objects are very different from one type of object to another. These features have a noticeable impact on how flat objects of each type of object can be moved. Thus, the behavior of the flat objects in the conveying means is very different from one type of objects to another, some flat objects tend to be more sluggish than others. This difference can be accentuated according to the type of conveyors used. This is particularly the case for conveyors with long, pinched belts forming turns. With the slowing down of some flat objects, the gap between flat objects of different types tends to vary with the movement of the flat objects, which may cause jams and / or catch-ups of two consecutive flat objects. It is therefore important that these sorting machines include unstacking devices able to optimally manage the gaps between flat objects.
La publication
Le but de l'invention est de remédier à ces inconvénients en proposant un dispositif et un procédé de dépilage d'objets plats permettant de prendre en compte les différents types d'objets, en anticipant les risques de variation d'écart entre objets plats, tout en optimisant le débit de dépilage. L'invention a également pour but de proposer un dispositif et un procédé de dépilage permettant, outre la prise en compte de différents types d'objets, d'adapter le traitement de chaque objet en fonction des spécificités propres de cet objet au sein du type d'objets auquel il appartient, notamment pour préserver au mieux l'intégrité de chaque objet plat.The object of the invention is to overcome these disadvantages by proposing a device and a method of unstacking flat objects to take into account the different types of objects, anticipating the risk of variation of gap between flat objects, while optimizing the unstacking rate. The object of the invention is also to propose a device and an unstacking method making it possible, in addition to taking into account different types of objects, to adapt the treatment of each object according to the specificities of this object within the type of objects to which it belongs, in particular to preserve the integrity of each flat object.
A cet effet, l'invention a pour objet un dispositif de dépilage pour machine de tri d'objets plats, configuré pour accepter en entrée des objets plats en pile et restituer en sortie lesdits objets plats en série séparés entre eux par un écart prédéterminé, ledit dispositif de dépilage comprenant au moins :
- des premiers moyens de détection aptes à détecter la transition entre un objet N d'un premier type spécialisé d'objets ou d'un type d'objets par défaut et un objet N+1, consécutif, respectivement d'un second ou d'un premier type spécialisé d'objets,
- un premier programme de dépilage spécialisé et un second programme de dépilage spécialisé, chacun apte à maintenir respectivement un premier écart nominal et un second écart nominal entre deux objets plats dépilés consécutifs,
- une unité de contrôle/commande apte à exécuter automatiquement l'un desdits premier et second programmes de dépilage spécialisés selon le type d'objets détecté,
- first detection means adapted to detect the transition between an object N of a first specialized type of object or of a type of objects by default and an object N + 1, consecutive, respectively of a second or of a first specialized type of objects,
- a first specialized unstacking program and a second specialized unstacking program, each able to maintain respectively a first nominal difference and a second nominal difference between two consecutive depilated flat objects,
- a control / command unit able to automatically execute one of said first and second specialized unstacking programs according to the type of detected objects,
On entend ici par écart, l'espace sans objet plat séparant la partie aval d'un premier objet plat et la partie amont d'un second objet plat le suivant selon le sens de déplacement des objets plats.By gap, here we mean the space without a flat object separating the downstream part of a first flat object and the upstream part of a second flat object following it according to the direction of movement of the flat objects.
Le dispositif de dépilage selon l'invention permet de détecter efficacement les transitions entre types d'objets dépilés. Les changements de réglages n'intervenant qu'après confirmation de la nécessité de ces changements de réglage obtenue par l'atteinte d'un seuil prédéterminé, le dispositif de dépilage selon l'invention permet d'adapter de manière optimale les écarts entre les objets plats en moyennant les risques d'erreur.The unstacking device according to the invention makes it possible to effectively detect the transitions between types of depilated objects. Adjustment changes occurring only after confirmation of the need for these changes in setting obtained by reaching a predetermined threshold, the unstacking device according to the invention makes it possible to optimally adapt the differences between the objects. dishes with the risk of error.
Le dispositif selon l'invention peut avantageusement présenter les particularités suivantes :
- ledit écart nominal par défaut est plus grand que ledit second écart nominal lui-même plus grand que ledit premier écart nominal,
- le dispositif de dépilage comprend au moins un troisième programme de dépilage spécialisé apte à maintenir un troisième écart nominal entre deux objets plats consécutifs, et un quatrième programme de dépilage spécialisé apte à maintenir un quatrième écart nominal entre deux objets plats consécutifs,
- ledit troisième écart nominal est plus grand que ledit second écart nominal et plus petit que ledit écart nominal par défaut, et ledit quatrième écart nominal est plus grand que ledit troisième écart nominal et plus petit que ledit écart nominal par défaut,
- lesdits premiers moyens de détection sont agencés pour détecter au moins l'un desdits premier, second, troisième et quatrième types spécialisés d'objets selon au moins un type d'objets prédéterminé correspondant respectivement aux envois plats au format lettre, envois plats grand format, magazines, envois plats emballés,
- le dispositif de dépilage comporte en outre des seconds moyens de détection agencés pour détecter la différence entre au moins une caractéristique physique prédéterminée dudit objet plat dépilé et la valeur nominale prédéterminée de ladite caractéristique physique pour le type spécialisé d'objets auquel ledit objet plat correspond, ladite unité de contrôle/commande étant apte à moduler, de manière prédéterminée en fonction de cette détection de différence, ledit écart nominal correspondant,
- ladite unité de commande est apte à modifier ledit écart prédéterminé ou à moduler l'un desdits écarts nominaux en appliquant une valeur prédéterminée à au moins l'un des paramètres de fonctionnement dudit dispositif de dépilage choisi dans le groupe comprenant au moins la vitesse de déplacement dudit objet plat, l'inclinaison dudit objet plat sur chant, la position et la pression d'un soufflage appliqué sur ledit objet plat, la dépression d'une aspiration appliquée sur ledit objet plat,
- ladite caractéristique physique prédéterminée est choisie dans le groupe comprenant au moins les dimensions, la rigidité, l'épaisseur, le poids dudit objet plat dépilé.
- said nominal deviation by default is larger than said second nominal deviation itself larger than said first nominal deviation,
- the unstacking device comprises at least a third specialized unstacking program capable of maintaining a third nominal gap between two consecutive flat objects, and a fourth specialized unstacking program capable of maintaining a fourth nominal gap between two consecutive flat objects,
- said third nominal deviation is greater than said second nominal deviation and smaller than said nominal deviation by default, and said fourth nominal deviation is larger than said third nominal deviation and smaller than said nominal nominal deviation,
- said first detection means are arranged to detect at least one of said first, second, third and fourth specialized types of objects according to at least one predetermined type of object corresponding respectively to letter-flat, wide-format flat mail, magazines, packaged flat items,
- the unstacking device further comprises second detecting means arranged to detect the difference between at least one predetermined physical characteristic of said unstacked flat object and the predetermined nominal value of said physical characteristic for the specialized type of object to which said flat object corresponds, said control / control unit being able to modulate, in a predetermined way according to this difference detection, said corresponding nominal difference,
- said control unit is adapted to modify said predetermined distance or to modulate one of said nominal deviations by applying a predetermined value to at least one of the operating parameters of said unstacking device selected from the group comprising at least the speed of displacement said flat object, the inclination of said flat object on edge, the position and the pressure of a blow applied on said flat object, the vacuum of a suction applied to said flat object,
- said predetermined physical characteristic is chosen from the group comprising at least the dimensions, the rigidity, the thickness, the weight of said flat object depilated.
L'invention a également pour objet un procédé de dépilage d'objets plats au cours duquel on accepte en entrée des objets plats disposés en pile, on réalise une étape de "dépilage" des objets plats et on restitue en sortie lesdits objets plats en série séparés par un écart prédéterminé, on réalise une étape de "détection de transition" au cours de laquelle on détecte la transition entre un objet N d'un premier type spécialisé d'objets ou d'un type d'objets par défaut et un objet N+1 consécutif et respectivement d'un second ou premier type spécialisé d'objets, on modifie ledit écart prédéterminé respectivement selon le type d'objets détecté pour appliquer un premier écart nominal ou un second écart nominal correspondant, caractérisé en ce qu'après détection d'une transition, on dépile lesdits objets plats avec un écart nominal par défaut différent desdits premier et second écarts nominaux, en ce qu'au cours d'une étape "incrémentation compteur" on comptabilise lesdits objets plats subséquents à ladite transition, en ce qu'au cours d'une étape « vérification seuil comptage atteint" on vérifie l'atteinte par ledit comptage d'un seuil de comptage prédéterminé et, lorsque ledit seuil de comptage est atteint, jusqu'à la prochaine "détection de transition", on dépile lesdits objets plats subséquents avec ledit premier, second écart nominal correspondant au type d'objets détecté.The invention also relates to a method of unstacking flat objects in which flat objects arranged in a stack are accepted at the entrance, a step of "unstacking" flat objects is carried out and said flat objects in series are outputted. separated by a predetermined distance, a "transition detection" step is performed during which the transition between an object N of a first specialized type of objects or of a type of objects by default and an object is detected. N + 1 consecutive and respectively of a second or first specialized type of objects, said predetermined difference is respectively modified according to the type of detected objects to apply a first nominal difference or a second corresponding nominal difference, characterized in that after detecting a transition, said flat objects are de-stained with a nominal nominal deviation different from said first and second nominal deviations, in that during a step "incrementation counter the said flat objects subsequent to the said transition are counted, in that during a step "verification threshold counting reached", the attainment by said count of a predetermined counting threshold is checked and, when said counting threshold is reached, until the next "transition detection", said subsequent flat objects are de-stained with said first, second nominal deviation corresponding to the detected object type.
De manière avantageuse, au cours d'une étape de "détection de différence", on détecte la différence entre au moins une caractéristique physique prédéterminée dudit objet plat dépilé et la valeur nominale prédéterminée de ladite caractéristique physique pour ledit type spécialisé d'objets correspondant, et en ce qu'au cours d'une étape de "modulation de programme", on module de manière prédéterminée en fonction de cette détection de différence, ledit écart nominal correspondant respectivement dans ledit programme de dépilage spécialisé ou par défaut.Advantageously, during a "difference detection" step, the difference between at least one characteristic is detected. the predetermined physical value of said punctured flat object and the predetermined nominal value of said physical characteristic for said corresponding specialized type of objects, and in that during a "program modulation" step, the predetermined modulus is modulated as a function of this difference detection, said corresponding nominal difference respectively in said specialized unstacking program or by default.
La présente invention sera mieux comprise et d'autres avantages apparaîtront à la lecture de la description détaillée d'un mode de réalisation pris à titre d'exemple nullement limitatif et illustré par les dessins annexés, dans lesquels :
- la
figure 1 est une vue de dessus d'une machine de tri d'objets plats comportant un dispositif de dépilage selon l'invention ; - la
figure 2 est une vue schématique partielle en perspective du dispositif de dépilage selon l'invention ; - la
figure 3 est un organigramme représentant schématiquement les étapes du procédé de dépilage selon l'invention ; - les
figures 4 sont des schémas illustrant deux séquences de fonctionnement du procédé de dépilage.et 5
- the
figure 1 is a top view of a flat objects sorting machine comprising an unstacking device according to the invention; - the
figure 2 is a partial schematic perspective view of the unstacking device according to the invention; - the
figure 3 is a flowchart showing schematically the steps of the unstacking process according to the invention; - the
Figures 4 and 5 are diagrams illustrating two operating sequences of the unstacking process.
En référence à la
En référence à la
- un premier type spécialisé d'objets correspondant aux envois plats petits formats papier, par exemple de type format lettre,
- un second type spécialisé d'objets correspondant aux envois plats grands formats papier,
- un troisième type spécialisé d'objets correspondant aux magazines avec agrafe(s),
- un quatrième type spécialisé d'objets correspondant aux envois plats emballés dans du plastique.
- a first specialized type of objects corresponding to small flat paper format mail items, for example of the letter size type,
- a second specialized type of objects corresponding to flat large format paper shipments,
- a third specialized type of objects corresponding to magazines with clip (s),
- a fourth specialized type of objects corresponding to flat items packaged in plastic.
Selon un mode de réalisation non représenté, lors d'une seconde passe de tri ou d'une passe ultérieure, les transitions peuvent être connues de la passe de tri précédente au cours de laquelle une liste peut être établie, cette liste comportant par exemple les objets et leurs types d'objets correspondants. Dans ce cas, les moyens de détection intègrent cette liste préétablie.According to an embodiment that is not represented, during a second sorting pass or a subsequent pass, the transitions can be known from the previous sorting pass during which a list can be established. For example, the list includes objects and their corresponding object types. In this case, the detection means integrate this preset list.
Selon un autre mode de réalisation non représenté, les transitions peuvent être connues à l'avance, par exemple par le biais d'une liste associée à chaque pile d'objets plats, communiquée par l'émetteur du lot contenant la pile d'objets plats. Comme la précédente, cette liste peut comporter les objets et leurs types d'objets correspondants Dans ce cas également, les moyens de détection intègrent cette liste préétablie.According to another embodiment not shown, the transitions can be known in advance, for example by means of a list associated with each stack of flat objects, communicated by the transmitter of the batch containing the stack of objects. dishes. Like the previous one, this list may include the objects and their corresponding object types. In this case also, the detection means integrate this preset list.
En référence aux figures, la détection du type spécialisé d'objets peut être séquentielle et relative dans le sens où l'on détecte la transition entre un type spécialisé d'objets précédemment détecté et le type spécialisé d'objets couramment détecté. L'étape de détection peut ainsi comporter des sous-étapes de détection telles que décrites ci-après. Par exemple, lors d'une première sous-étape de détection, on vérifie si l'objet plat 5 à dépiler appartient au quatrième type spécialisé d'objets (envois plats emballés dans du plastique) en détectant le matériau de ses faces externes. Si ce matériau est du plastique et non du papier, l'objet plat 5 est affecté au quatrième type spécialisé d'objets (envois plats emballés dans du plastique) et dépilé avec un quatrième écart nominal séparant les objets plats 5 consécutifs. Si ce matériau n'est pas détecté comme du plastique, lors d'une deuxième sous-étape de détection, on vérifie si l'objet plat à dépilé comporte une ou plusieurs agrafes. En cas de présence d'agrafe, l'objet plat 5 à dépiler est affecté au troisième type spécialisé d'objets (magazines avec agrafe(s)) et dépilé avec un troisième écart nominal séparant les objets plats 5 consécutifs. En cas de non détection d'agrafe, lors une troisième sous-étape de détection, on vérifie si les dimensions de l'objet plat 5 à dépilé correspondent aux objets du deuxième type spécialisé d'objets (envois plats grands formats papier). Dans l'affirmative, l'objet plat 5 à dépiler est affecté au second type spécialisé d'objets (envois plats grands formats papier) et dépilé avec un second écart nominal séparant les objets plats 5 consécutifs. Dans la négative, l'objet plat 5 en cours de dépilage est affecté au premier type spécialisé d'objets (envois plats petits formats papier) et dépilé avec un premier écart nominal séparant les objets plats 5 consécutifs. Il est bien entendu que les types spécialisés d'objets peuvent être prédéterminés selon d'autres critères que ceux décrits et que la séquence de détection peut être différente. De même les types spécialisés d'objets peuvent être plus ou moins nombreux. Les premiers moyens de détection 11 permettent ainsi de détecter toute transition entre le type d'un objet plat N dépilé et le type d'un objet plat N+1 consécutif à dépiler. Comme décrit ultérieurement, cette détection de transition est utilisée pour adapter le fonctionnement du dispositif de dépilage 2 et en particulier l'écart prédéterminé séparant les objets plats 5 consécutifs en fonction de leurs caractéristiques physiques et des risques de glissement et décalages inhérents à ces caractéristiques physiques. Les premiers moyens de détection 11 comportent par exemple un capteur de matériau, une caméra ou tout autre moyen connu adapté. Les premiers moyens de détection 11 peuvent également être disposés en regard de la fente d'extraction 10 au-dessus de la pile d'objets plats 5.With reference to the figures, the detection of the specialized type of objects can be sequential and relative in the sense that the transition between a specialized type of previously detected objects and the specialized type of objects currently detected is detected. The detection step may thus comprise detecting sub-steps as described below. For example, during a first detection sub-step, it is checked whether the flat object to be unstacked belongs to the fourth specialized type of object (flat items packaged in plastic) by detecting the material of its external faces. If this material is plastic and not paper, the
Le dispositif de dépilage 2 comprend en outre une unité de contrôle/commande (non représentée) qui exécute automatiquement différents programmes de dépilage adaptés respectivement aux différents types spécialisés d'objets détectés par les premiers moyens de détection 11. Ainsi, un premier programme de dépilage spécialisé est apte à maintenir un premier écart nominal prédéterminé entre deux objets plats 5 consécutifs appartenant au premier type spécialisé d'objets (envois plats petits formats papier), par exemple de 100 mm; un second programme de dépilage spécialisé est apte à maintenir un second écart nominal prédéterminé entre deux objets plats 5 consécutifs appartenant au second type spécialisé d'objets (envois plats grands formats papier), par exemple de 150 mm ; un troisième programme de dépilage spécialisé est apte à maintenir un troisième écart nominal prédéterminé entre deux objets plats 5 consécutifs appartenant au troisième type spécialisé d'objets (magazines avec agrafe(s)), par exemple de 200 mm ; un quatrième programme de dépilage spécialisé est apte à maintenir un quatrième écart nominal prédéterminé entre deux objets plats 5 consécutifs appartenant au quatrième type spécialisé d'objets (magazines), par exemple de 250 mm. De plus, un programme de dépilage par défaut est apte à maintenir un écart nominal par défaut prédéterminé entre deux objets plats 5 consécutifs n'appartenant à aucun type spécialisé d'objets, par exemple de 300 mm. Comme décrit ultérieurement, ce programme de dépilage par défaut sera utilisé comme programme "refuge" lorsque les objets plats 5 dépilés ont des caractéristiques hétérogènes, et également à chaque transition. Ainsi, lorsqu'une transition est détectée, l'unité de contrôle/commande exécute le programme de dépilage par défaut et comptabilise les objets plats 5 subséquents à la détection de la transition. Si une autre transition est détectée, le compteur est remis à zéro et le comptage reprend. Lorsqu'après une transition, un seuil comptage prédéterminé est atteint, l'unité de contrôle/commande exécute le premier, second, troisième ou quatrième programme de dépilage spécialisé correspondant. Tant que le seuil comptage n'est pas atteint, l'unité de contrôle/commande exécute le programme de dépilage par défaut et dépile les objets plats 5 séparés par l'écart nominal. Ainsi, une fois le seuil de comptage atteint, l'écart prédéterminé séparant deux objets plats 5 dépilés est adapté au type spécialisé auquel correspondent les objets dépilés et l'objet plat à dépiler suivant. A chaque programme de dépilage spécialisé et programme de dépilage par défaut, correspondent également des paramètres de fonctionnement ayant des valeurs prédéterminées spécifiques. Ces paramètres de fonctionnement sont par exemple la vitesse de déplacement de l'objet plat 5, l'angle de l'objet plat 5 sur chant, la position et la pression d'un soufflage appliqué sur l'objet plat 5, la dépression d'une aspiration appliquée sur l'objet plat 5. Le réglage de l'angle de l'objet plat 5 sur chant s'obtient par exemple en faisant varier séparément l'avance et le recul du tapis de pied 6 et de la palette 8.The
A chaque type d'objets, spécialisé ou par défaut, peuvent correspondre différentes caractéristiques physiques des objets plats 5, par exemple des caractéristiques de dimensions, rigidité, épaisseur, poids. Ainsi à l'intérieur d'un même type spécialisé d'objets, ces valeurs de caractéristiques physiques peuvent varier. L'unité de contrôle/commande est agencée pour mémoriser une valeur nominale pour chacune de ces caractéristiques physiques, cette valeur nominale étant prédéterminée en fonction du type d'objets auxquels les objets plats 5 appartiennent. Chaque valeur nominale peut également être une plage de valeurs. Le dispositif de dépilage 2 comprend des seconds moyens de détection 12 aptes à détecter, pour un type spécialisé d'objets, si l'une des caractéristiques physiques prédéterminée de l'objet plat 5 dépilé est différente de la valeur nominale prédéterminée. En cas de différence, l'unité de contrôle/commande module, de manière prédéterminée, les paramètres de fonctionnement du programme de dépilage utilisé et donc l'écart nominal entre deux objets plats 5 dépilés consécutifs.Each type of object, specialized or default, can correspond to different physical characteristics of the
Le dispositif de dépilage 2 tel que décrit précédemment peut avantageusement être couplé avec un ou plusieurs autres dispositifs de dépilage 2 similaires ou différents.The
Le procédé de dépilage selon l'invention est décrit ci-après en référence à la
Au cours d'une étape de "détection de transition" 22, on utilise les premiers moyens de détection 11 afin de vérifier si l'objet plat 5 dépilé appartient à l'un des types spécialisés d'objets.During a "transition detection"
Si à cette étape "détection de transition" 22, l'objet plat 5 à dépiler est détecté comme étant d'un type spécialisé d'objets différent du type d'objets correspondant au programme de dépilage actif, alors le procédé est poursuivi par l'étape de "vérification programme par défaut actif ?" 23 au cours de laquelle on vérifie si le programme de dépilage actif est le programme de dépilage par défaut.If at this stage "transition detection" 22, the
Dans la négative, si le programme de dépilage utilisé est différent du programme de dépilage par défaut, on réalise une étape "activation programme de dépilage par défaut" 24 au cours de laquelle on active le programme de dépilage par défaut. L'étape "activation programme par défaut" 24 est suivie d'une étape de "mise à zéro compteur" 25 au cours de laquelle on remet le compteur à zéro.If not, if the unstacking program used is different from the default unstacking program, a "default unloading program activation"
Dans l'affirmative, si le programme de dépilage utilisé lors de l'étape "vérification programme par défaut actif ?" 23 est le programme de dépilage par défaut, on procède directement à l'étape de "mise à zéro compteur" 25.If yes, if the unstacking program used during the step "check program default active?" 23 is the default unstacking program, it proceeds directly to the step of "counter zero" 25.
Ensuite, on réalise, une étape "incrémentation compteur" 26 au cours de laquelle, à chaque objet plat 5 à dépiler, subséquent à la détection de la transition et qui correspond au type spécialisé d'objets détecté, on incrémente le compteur d'une unité.Then, a step "incrementation counter" 26 is performed during which, at each
Ensuite, au cours de l'étape "vérification seuil comptage atteint" 27, on vérifie si le nombre d'objets plats 5 comptés, du type spécialisé d'objets détecté après la transition, est égal au seuil de comptage prédéterminé, par exemple de trois objets plats 5 comptés.Then, during the step "check counting threshold reached" 27, it is checked whether the number of
Si le seuil de comptage prédéterminé est atteint, le procédé de dépilage est poursuivi par l'étape "activation programme spécial" 28 au cours de laquelle, l'unité de contrôle/commande passe du programme de dépilage par défaut à l'un des programmes de dépilage spécialisés. Ainsi, l'unité de contrôle/commande modifie l'écart entre les objets plats 5 consécutifs dépilés et éventuellement l'un ou plusieurs des autres paramètres de fonctionnement du dispositif de dépilage 2 comme décrit plus loin.If the predetermined count threshold is reached, the unstacking process is continued by the "special program activation"
Ensuite, on réalise une étape de "détection de différence" 29 au cours de laquelle on utilise les seconds moyens de détection 12 pour vérifier si les caractéristiques physiques prédéterminées de l'objet plat 5 dépilé correspondent aux valeurs nominales prévues par le programme de dépilage spécial. Ces caractéristiques physiques sont par exemple les dimensions, la rigidité, l'épaisseur, le poids de l'objet plat dépilé. La détection de différence peut porter sur une ou plusieurs de ces caractéristiques physiques.Then, a "difference detecting"
Si à cette étape "détection différence" 29, les caractéristiques physiques de l'objet plat 5 dépilé correspondent individuellement aux valeurs nominales prévues, il n'y a pas de détection d'une différence, et le procédé de dépilage est poursuivi par l'étape "détection de transition" 22 précédemment décrite.If at this stage "difference detection" 29, the physical characteristics of the flat object depilated correspond individually to the nominal values provided, there is no detection of a difference, and the unstacking process is continued by the step "transition detection" 22 previously described.
Si à l'étape "détection différence" 29, l'une (ou plusieurs) des caractéristiques physiques de l'objet plat 5 dépilé ne correspond(ent) pas à sa(ses) valeur(s) nominale(s) préétablie(s) selon le programme de dépilage actif, il y a détection d'une différence et le procédé de dépilage est poursuivi par l'étape "modulation de programme" 30 au cours laquelle on module un ou plusieurs paramètres de fonctionnement du dispositif de dépilage 2, de manière prédéterminée, en fonction de la différence de caractéristique physique détectée. On peut ainsi, par exemple, moduler un ou plusieurs des paramètres suivants : la vitesse de déplacement de l'objet plat 5, l'angle de l'objet plat 5 sur chant, la position et la pression d'un soufflage appliqué sur l'objet plat 5, la dépression d'une aspiration appliquée sur l'objet plat 5.If at the "difference detection"
Après l'étape "modulation de programme" 30, on continue le dépilage dans le programme de dépilage en cours avec les paramètres de fonctionnement modulés et on réalise l'étape "détection de transition" 22 telle que précédemment décrite.After the "program modulation"
Si au cours de l'étape "vérification seuil comptage atteint" 27, le seuil prédéterminé n'est pas atteint, le procédé de dépilage est poursuivi par l'étape "détection différence" 29 telle que précédemment décrite.If during the step "check count threshold reached" 27, the predetermined threshold is not reached, the unstacking process is continued by the step "detection difference" 29 as previously described.
L'étape de "vérification seuil atteint" 27 permet ainsi de moyenner le risque d'erreurs et de préserver le temps nécessaires aux changements de paramètres de fonctionnement entre deux réglages différents. Les dispositifs de dépilage connus réagissent objet par objet, aussi ils sont souvent instables puisqu'ils sont susceptibles, à chaque objet plat à dépiler, de changer de programme de dépilage. Ils sont également peu efficaces car, de manière fréquente, le nouveau paramètre de fonctionnement n'a pas eu le temps d'être atteint qu'il doit déjà être modifié pour s'adapter au nouvel objet plat à dépiler. De plus, les dispositifs de dépilage connus prennent en compte les erreurs de détection. Ainsi en cas de détection erronée de la nécessité de changer de programme de dépilage, le programme de dépilage est modifié sans possibilité d'éviter cette modification. Ainsi, le dispositif de dépilage 2 et le procédé de dépilage selon l'invention permettent de prendre en compte de telles erreurs de détection et d'avoir un fonctionnement stable au cours duquel les consignes de réglages ont le temps d'être atteintes avant tout autre changement. En effet, en cas d'une détection ponctuelle erronée, le seuil ne sera soit :
- pas atteint, la détection des objets
plats 5 subséquents permettant de corriger l'erreur de détection si les détections subséquentes des caractéristiques des objets plats 5 ne confirment pas la détection erronée préalable ; - atteint si les objets
plats 5 subséquents à la détection erronée sont du même type d'objets que l'objetplat 5 à la source de la détection erronée.
- not achieved, detecting subsequent flat objects for correcting the detection error if subsequent detections of flat object characteristics do not confirm the prior erroneous detection;
- achieved if the flat objects subsequent to the erroneous detection are of the same type of objects as the flat object at the source of the erroneous detection.
Si à l'étape "détection de transition" 22, l'objet plat 5 à dépiler est du même type d'objets que celui correspondant au programme de dépilage actif et en cours d'utilisation, alors le procédé est poursuivi par l'étape "incrémentation compteur" 26 précédemment décrite. Les étapes précédemment décrite sont individuellement commandées par l'unité de contrôle/commande.If in the "transition detection"
Les
En référence à la
En référence à la
Il est bien entendu que ces deux séquences de fonctionnement ne sont données qu'à titre d'exemple et qu'une multitude d'autres séquences de fonctionnement sont possibles.It is understood that these two operating sequences are given by way of example and a multitude of other operating sequences are possible.
Claims (10)
- An unstacker device (2) for a sorting machine (1) for sorting flat articles (5), said unstacker device being configured to accept at its inlet flat articles (5) in a stack, and to deliver at its outlet said flat articles (5) in series, and with a predetermined gap between them, said unstacker device (2) including at least:· first detection means (11) suitable for detecting the transition between an article N of a first specialized article type or of a default article type and a consecutive article N+1, respectively of a second specialized article type or of a first specialized article type;· a first specialized unstacking program and a second specialized unstacking program, each of which is suitable for maintaining respectively a first nominal gap and a second nominal gap between two consecutive unstacked flat articles (5); and· a monitoring/control unit suitable for automatically executing one of said first and second specialized unstacking programs depending on the article type that is detected;said unstacker device being characterized in that it includes a default unstacking program suitable for maintaining a default nominal gap between two consecutive unstacked articles (5), which default nominal gap is different from said first and second nominal gaps, said monitoring/control unit being arranged for automatically executing said default unstacking program in response to detection of said transition, for counting said flat articles (5) subsequent to said transition, and, in response to a predetermined counting threshold being reached, for executing, for said subsequent flat articles (5) and until the next transition detection, that one of said first and second specialized unstacking programs that corresponds to the detected specialized article type.
- An unstacker device (2) according to the preceding claim, characterized in that said default nominal gap is larger than said second nominal gap, which is itself larger than said first nominal gap.
- An unstacker device (2) according to claim 1, characterized in that it includes at least one third specialized unstacking program suitable for maintaining a third nominal gap between two consecutive flat articles (5), and a fourth specialized unstacking program suitable for maintaining a fourth nominal gap between two consecutive flat articles (5).
- An unstacker device (2) according to the preceding claim, characterized in that said third nominal gap is larger than said second nominal gap and is smaller than said default nominal gap, and said fourth nominal gap is larger than said third nominal gap and smaller than said default nominal gap.
- An unstacker device (2) according to any preceding claim, characterized in that said first detection means (11) are arranged to detect at least one of said first, second, third, and fourth specialized article types on the basis of at least one predetermined article type and corresponding respectively to letter-format flat articles, to large-format flat articles, to magazines, and to wrapped flat mailpieces.
- An unstacker device (2) according to any preceding claim, characterized in that it further includes second detection means (12) arranged to detect the difference between at least one predetermined physical characteristic of said unstacked flat article (5) and the predetermined nominal value of said physical characteristic for the specialized article type to which said flat article (5) corresponds, said monitoring/control unit being suitable for modulating said corresponding nominal gap in predetermined manner as a function of this difference detection.
- An unstacker device (2) according to any preceding claim, characterized in that said control unit is suitable for modifying said predetermined gap or for modulating one of said nominal gaps by applying a predetermined value to at least one of the operating parameters of said unstacker device (2) chosen from the group comprising at least the speed of movement of said flat article (5), the inclination of said flat article (5) on edge, the position and the pressure of blowing applied to said flat article (5), the magnitude of suction applied to said article (5).
- An unstacker device (2) according to the preceding claim, characterized in that said predetermined physical characteristic is chosen from the group comprising at least the dimensions, the stiffness, the thickness, and the weight of said unstacked flat article.
- A method of unstacking flat articles (5), during which method flat articles (5) disposed as a stack are accepted as input, and an "unstacking" step (21) is performed for unstacking the flat articles (5) and said flat articles (5) are delivered as output in series and separated by a predetermined gap, a "transition detection" step (22) is performed during which the transition between an article N of a first specialized article type or of a default article type and a consecutive article N+1 respectively of a second or of a first specialized article type is detected, and said predetermined gap is modified respectively depending on the article type that is detected so as to apply a corresponding first nominal gap or a corresponding second nominal gap, said method being characterized in that, after a transition has been detected, said flat articles (5) are unstacked with a default nominal gap that is different from said first and second nominal gaps, in that, during an "increment counter" step (26), said flat articles (5) subsequent to said transition are counted, in that, during a "counting threshold reached" step (27) a check is made to determine whether said counting has reached a predetermined counting threshold, and, when said counting threshold is reached, and until the next transition detection in the "transition detection" step (22), said subsequent flat articles (5) are unstacked with said first or second nominal gap corresponding to the detected article type.
- An unstacking method according to the preceding claim, characterized in that, during a "difference detection" step (23), a check is made to detect the difference between at least one predetermined physical characteristic of said unstacked flat article (5) and the predetermined nominal value of said physical characteristic for said corresponding specialized or default article type, and in that, during a "modulate program" step (30), said corresponding nominal gap is modulated in predetermined manner respectively in said specialized or in said default unstacking program as a function of said difference detection.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1156392A FR2977814B1 (en) | 2011-07-13 | 2011-07-13 | DEPILING DEVICE FOR FLAT OBJECT SORTING MACHINE AND METHOD FOR DISPOLVING FLAT OBJECTS |
PCT/FR2012/050575 WO2013007904A1 (en) | 2011-07-13 | 2012-03-19 | Extraction device for a machine for sorting flat objects, and method for extracting flat objects |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2731735A1 EP2731735A1 (en) | 2014-05-21 |
EP2731735B1 true EP2731735B1 (en) | 2015-05-27 |
Family
ID=45974431
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12714811.2A Not-in-force EP2731735B1 (en) | 2011-07-13 | 2012-03-19 | Extraction device for a machine for sorting flat objects, and method for extracting flat objects |
Country Status (6)
Country | Link |
---|---|
US (1) | US8583275B2 (en) |
EP (1) | EP2731735B1 (en) |
AU (1) | AU2012282384B2 (en) |
DK (1) | DK2731735T3 (en) |
FR (1) | FR2977814B1 (en) |
WO (1) | WO2013007904A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3069791B1 (en) * | 2017-08-04 | 2019-08-16 | Solystic | INSTALLATION FOR SORTING MAIL PRODUCTS |
CN110802030B (en) * | 2019-11-15 | 2021-07-02 | 南华大学 | Package sorting method, device and equipment and readable storage medium |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004012378B3 (en) * | 2004-03-13 | 2005-09-22 | Siemens Ag | Method and device for sorting flat shipments |
EP2165776B1 (en) * | 2008-09-18 | 2012-02-01 | Selex Elsag S.P.A. | System for sorting and sequencing postal objects |
US8091885B2 (en) * | 2009-07-10 | 2012-01-10 | Northrop Grumman Systems Corporation | Mail doubles detection and correction system |
US8408380B2 (en) * | 2009-08-28 | 2013-04-02 | Dematic Corp. | Conveyor induct |
-
2011
- 2011-07-13 FR FR1156392A patent/FR2977814B1/en not_active Expired - Fee Related
-
2012
- 2012-03-19 WO PCT/FR2012/050575 patent/WO2013007904A1/en active Application Filing
- 2012-03-19 EP EP12714811.2A patent/EP2731735B1/en not_active Not-in-force
- 2012-03-19 AU AU2012282384A patent/AU2012282384B2/en not_active Ceased
- 2012-03-19 DK DK12714811.2T patent/DK2731735T3/en active
- 2012-03-19 US US13/521,438 patent/US8583275B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
FR2977814B1 (en) | 2013-07-12 |
DK2731735T3 (en) | 2015-06-29 |
US8583275B2 (en) | 2013-11-12 |
EP2731735A1 (en) | 2014-05-21 |
AU2012282384B2 (en) | 2014-09-11 |
US20130030563A1 (en) | 2013-01-31 |
AU2012282384A1 (en) | 2014-01-16 |
FR2977814A1 (en) | 2013-01-18 |
WO2013007904A1 (en) | 2013-01-17 |
AU2012282384A8 (en) | 2014-01-23 |
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