EP0252495B1 - Apparatus for destacking flat objects - Google Patents

Apparatus for destacking flat objects Download PDF

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Publication number
EP0252495B1
EP0252495B1 EP87109802A EP87109802A EP0252495B1 EP 0252495 B1 EP0252495 B1 EP 0252495B1 EP 87109802 A EP87109802 A EP 87109802A EP 87109802 A EP87109802 A EP 87109802A EP 0252495 B1 EP0252495 B1 EP 0252495B1
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EP
European Patent Office
Prior art keywords
objects
magazine
jogging
strip
zone
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP87109802A
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German (de)
French (fr)
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EP0252495A1 (en
Inventor
Jean-Pierre Hamant
Michel Chaudy
Philippe Jeantin
Laurent Pellegrin
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Compagnie Generale dAutomatisme CGA HBS SA
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Compagnie Generale dAutomatisme CGA HBS SA
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Publication of EP0252495A1 publication Critical patent/EP0252495A1/en
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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
    • B65H1/00—Supports or magazines for piles from which articles are to be separated
    • B65H1/02—Supports or magazines for piles from which articles are to be separated adapted to support articles on edge
    • B65H1/025—Supports or magazines for piles from which articles are to be separated adapted to support articles on edge with controlled positively-acting mechanical devices for advancing the pile to present the articles to the separating device
    • 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

  • a device performing their unstacking ensures the automatic feeding of an indexing or readdressing and / or sorting machine for these folds.
  • devices for unstacking flat objects essentially comprise a magazine for storing folds in a stack and an unstacking head at the end of a magazine.
  • the unstacking head is equipped with suction and transfer means for the terminal fold of the stack.
  • the store is, for its part, equipped with means for driving objects in a stack toward the head and means for presenting the terminal fold in front of the unstacking head.
  • the means for presenting the pleats in front of the unstacking head must therefore ensure, as the pleats advance towards the unstacking head, in particular, the side jogging of the pleats, which must be presented at least in the end zone of the stack aligned on one of their edges, as well as the separation of the folds from each other in this same end zone. This allows the head to make sure and correct grip of the terminal fold put only from this single fold regardless of the characteristics of the terminal fold and those of the fold that follows it.
  • These presentation means may include a lateral jogging edge on the magazine and means mounted in the bottom of the magazine and driven in rotation to push the folds against the lateral jogging edge.
  • Document US-A 3 995 851 shows such a destacking device.
  • the object store has a side bank along its length. This bank is in two independent parts substantially in the extension of one another and, with the end part at the end of the magazine that can be made vibrating and cooperating with the jogging means mounted in the bottom of the magazine, for better separation. objects in the terminal part.
  • the store can also be equipped with means giving an inclination to the folds in its terminal area so that the terminal fold is presented with the foot against the the stop or the suction wall of the unstacking head.
  • These latter means can be constituted by a set of motorized belts or a blowing ramp acting on the feet of the folds in this terminal area.
  • the object of the present invention is to provide a device for unstacking objects which can have very different characteristics between them, leading by particularly reliable and simple means of operation to particularly improved performance.
  • the subject of the present invention is a device for unstacking flat objects comprising a magazine receiving said objects in a stack, a unstacking head at the end of the magazine, means for advancing said objects in stack on the magazine, along a first lateral bank of the magazine and towards the unstacking head and, in the terminal part of the magazine defined facing the unstacking head where the jogging and straightening of the objects takes place, a second lateral bank substantially parallel to the first and said bank reference jogging with respect to the unstacking means, means for jogging objects and means for separating objects arriving in front of the unstacking means, characterized in that it further comprises a third lateral bank known as a transition and of straightening of objects mounted at the end of the first bank, extending inclined towards the outside of the store, from rear to front in the direction of advance of said objects, on the maje another part, known as the transition and straightening zone, of said terminal part of the magazine, said second reference bank being disposed in a rece
  • the transition and straightening bank has an increasing inclination from upstream to downstream, with the upper edge of its terminal part more inclined than its lower edge.
  • the unstacking head 2 is illustrated of the suction cup type 3 mounted on an arm 4 pivoting facing the terminal fold of the stack and movable in translation laterally in front of the stack.
  • a stop 5 for the foot of the terminal fold of the stack is associated with the suction cup 3.
  • This type of unstacking head is as such known. Its control means has therefore simply been shown schematically in 6, it drives the suction cup in a back and forth tilting movement, indicated by the double arrow 7, for the removal of the terminal fold from the stack, the foot of which passes over the stop 5, then in a forward and backward translation movement, indicated by the double arrow 8, for the lateral transfer of the terminal fold taken.
  • This unstacking head is mounted in front of the open front face of the magazine on which the simple stop 5 for the base fold end of the stack is defined.
  • Tray 1 is of the type with manual loading of a stack of folds; it is open at least on its upper side which is not referenced, advantageously has its bottom 9 inclined to the horizontal, with an ascending slope from back to front and has a retaining pallet 10 at the rear of the stack. He receives an unorganized pile of pleats to be deposed resting on edge on its bottom and retained by the rear pallet. It has an internal lateral flank 11 retaining, if necessary, the stack of folds during loading.
  • This store is organized, according to its length considered from the rear of the store, into three zones denoted Zi, Z 2 , Zs.
  • the zone Zi corresponds to the major part of its length, it constitutes a zone known in advance as folds in stack towards the unstacking head.
  • Zone Z 3 of short length is the terminal zone in front of the unstacking head, it constitutes a so-called unstacking waiting zone.
  • Zone Z 2 is the intermediate zone; it is called the transition and straightening zone of the folds; it receives the folds as they appear from the zone Zi and simultaneously ensures their jogging and their straightening during their passage towards the unstacking waiting zone Z s for their presentation as favorable as possible for unstacking in front of the head of unstacking.
  • this store is differently equipped according to its areas.
  • the retaining pallet 10 at the rear of the stack is also coupled to the chain 17, for its advance in synchronism with the stack of plies.
  • This pallet is slidably mounted along a lateral guide 25 on the magazine and has a finger or lug 26 for hooking between the links of the chain 17.
  • This protruding finger or lug at the bottom of the pallet ensures the advance of the pallet according to arrow F practically up to the stop 5, at which the chain, fleeing on its idler roller 19 under the magazine, escapes it.
  • the return of the pallet to the rear of the magazine for a new loading of the magazine is ensured manually with a slight pivoting of the pallet avoiding during this rear return the catch of his finger on the chain while stopped.
  • This edge 31 is fixed to the internal lateral flank 11 of the magazine; for this purpose, it has a vertical end portion fixed to the internal lateral flank 11 in the zone Z1 1 and then is inclined, with respect to the advance of the folds according to the arrow F, essentially along the zone Z 2 . Its end in zone 2 2 is offset from the jogging reference bank 30 of zone Zs, which is more external to the magazine and is extends behind the bank 31 in zone Z 2 .
  • the jogging reference edge 30 is vertical.
  • edges 31 and 30 are associated with two jogging rollers 35 and 36 and two screws 37 and 38 with helical threads with reverse pitch from one screw to the other and called advance and delay of folds.
  • rollers and screws are mounted at the end of the magazine, with the screws interposed between the rollers. They are of axis parallel in advance according to the arrow F of the folds; they extend the bottom 9 of the magazine and the means for advancing the folds 12 which equip the bottom 9, up to the stop 5 while being in slight relief above the level of the bottom 9.
  • a bottom front plate 39 is associated with the rollers and screws 35, 36 and 37, 38; this cut plate defines slots inserted in the intervals between rollers and screws, and extends the bottom 9.
  • the threaded screw 37 following the roller 35 in the direction transverse to the magazine, is the screw for advancing the folds. It is threaded over the zone Z 2 , ie substantially over two thirds of its length; its end portion belonging to zone Z 3 is smooth and has its periphery substantially at the same level as that of the roller 35.
  • This advance screw 37 is disposed substantially opposite the unstacking head 2.
  • the second jogging roller 36 extends between the chain 17 and the delay screw 38, substantially on the external side of the magazine.
  • the two jogging rollers 35 and 36 and the two advance and delay screws 37 and 38 are rotated from the same geared motor 40.
  • a flat belt 41 and pulleys 42 with which tensioners 43 are associated ensure their training.
  • the speed of rotation of the rollers and screws is chosen to obtain a linear speed of advance in zone Z 2 greater than that due to the straps in zone Z i and a linear speed of delay in zone Z 3 of same order of magnitude as that in zone Z i .
  • a photoelectric cell 45 and an associated lamp 46 ensure the detection of folds in the unstacking waiting zone Zs.
  • the lamp 46 is mounted above the lateral edge jogging 30 of the zone Z 3 practically at the end of the edge 31, the photoelectric cell is mounted on the opposite side, substantially at the end of the stop 5; they define an axis of detection of the folds crossing obliquely the zone Zs.
  • This cell controls, when the beam emitted by the lamp is interrupted and then not picked up, in particular when there are folds in the zone Z s , l stopping the motor 20 ensuring the advance of the folds and, if not, starting it up. It also controls the stopping of this motor when the magazine is completely empty after a destacking operation, under these conditions the pallet having arrived in the zone Z s and interrupting the beam of the lamp 46.
  • a second stop 50 in front of the stop 5, defines with the latter a chute for receiving the fold gripped by the suction cup 3 and for guiding the fold during its transfer in translation by the suction cup.
  • the fold entered, which is transferred in translation along the arrow 8 between the stops 5 and 50, is then taken care of by a belt system generally designated by the reference 51, for its ejection and possible treatment.
  • FIGS. 4 and 5 there is illustrated separately and on a larger scale the bank of transmission and straightening 31, seen from the front and from above.
  • this bank 31 first of all has a vertical end tab 53 for attachment to the internal lateral flank 11 of the magazine.
  • Horizontal buttonholes 54 provided on this tab 53 allow adjustment of the positioning of the edge at the end of the internal lateral flank of the magazine.
  • the edge 31 proper is understood beyond the latching lug 53, it is inclined on the latching lug to extend towards the outside of the store and also widens over the height of the store.
  • This inclined part has a first flat portion 55 adjoining the vertical hooking tab and a second curved portion 56 substantially along a frustoconical surface.
  • the flat portion 55 forms with the hooking lug 53 a bias edge 58 after folding, on the face of the bank 31 facing the interior of the store.
  • the folding angle, noted A is advantageously chosen to be of the order of 20 degrees, it gives the inclination of the edge relative to the advance of the folds according to arrow F.
  • the lower edge of this planar portion 55 is parallel at the bottom of the magazine, its upper edge 59 is inclined to flare the bank in the direction of the front of the magazine.
  • the curved portion 56 extends the planar portion 55, without any really visible transition therefrom. This transition is shown diagrammatically by the dotted line 57.
  • the portion 56 results from preforming, then from polishing with the portion 55.
  • the radius of curvature of its lower edge is substantially double that of its upper edge, to accentuate the inclination, towards the outside of the store, of the upper part of this portion relative to that of its lower part and thus reduce even the slightest effort to slide folds on this terminal portion of the bank 31.
  • the radii of curvature R1 and R2 of its lower and upper edges tangent to the line 57 have been noted.
  • the internal face of the store of this bank 31 is covered with a coating or with a non-stick film not shown, such as a polyvinyl chloride film.
  • the advance of the folds as they have been loaded is ensured according to the arrow F by the belts 12.
  • these are requested by the action of the slight transverse force exerted on their foot, by friction on the jogging rollers, for jogging the folds against the inclined flat portion of the bank 31, and simultaneously by the advancing action exerted on their foot by the advancing screw .
  • the linear speed of advance of the folds in the zone Z 2 chosen to be greater than that of the advance of the stack in the zone Z i , releases these folds from the stack and allows the effective action of the jogging rollers.
  • the jogging rollers and the smooth portion of the advance screw hold the folds against the jogging reference edge.
  • the delay screw 38 continues its action on the folds; it gives the terminal fold a bias positioning of a few degrees relative to the stop 5, to avoid any possible packing of folds in this unstacking waiting zone Zs and a possible thrust which can lead to bonding of the terminal fold against the suction cup in rest position.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)

Description

La présente invention concerne le dépilage d'objets plats, en vue de leur prélèvement un à un d'une pile et de leur distribution unitaire.The present invention relates to the unstacking of flat objects, with a view to their removal one by one from a stack and their unitary distribution.

Ces objets plats peuvent être en particulier des plis postaux.These flat objects can in particular be postal folds.

Un dispositif réalisant leur dépilage permet d'assurer l'alimentation automatique d'une machine d'indexation ou de réadressage et/ou de tri de ces plis.A device performing their unstacking ensures the automatic feeding of an indexing or readdressing and / or sorting machine for these folds.

D'une manière connue, les dispositifs de dépilage d'objets plats, tels que plis postaux, comportent essentiellement un magasin de stockage des plis en pile et une tête de dépilage en bout d'un magasin. La tête de dépilage est à moyens d'aspiration et de transfert du pli terminal de la pile. Le magasin est, quant à lui, équipé de moyens d'entraînement des objets en pile vers la tête et de moyens de présentation convenable du pli terminal devant la tête de dépilage.In a known manner, devices for unstacking flat objects, such as postal envelopes, essentially comprise a magazine for storing folds in a stack and an unstacking head at the end of a magazine. The unstacking head is equipped with suction and transfer means for the terminal fold of the stack. The store is, for its part, equipped with means for driving objects in a stack toward the head and means for presenting the terminal fold in front of the unstacking head.

A titre d'exemple, la tête de dépilage peut être constituée par une ventouse d'aspiration animée d'un mouvement de basculement avantageusement selon une course aller et retour et d'un mouvement de translation aller et retour, à laquelle est associée une butée pour le pli terminal avant son prélèvement de la pile. Elle peut aussi être constituée par une paroi à orifices d'aspiration à laquelle est associé un tambour de mise en vitesse du pli ou par une courroie ou un tambour d'aspiration et de mise en vitesse.By way of example, the unstacking head can be constituted by a suction cup animated with a tilting movement advantageously according to a back and forth stroke and a back and forth translation movement, with which a stop is associated for the final fold before removing it from the stack. It can also be constituted by a wall with suction orifices with which is associated a drum for speeding up the fold or by a belt or a drum for suction and speeding.

Les moyens de présentation convenable des objets face à la tête de dépilage qui équipent le magasin de stockage doivent répondre à de nombreux objectifs, en particulier, face aux contraintes à prendre en compte dans le traitement de plis postaux pouvant présenter entre eux des caractéristiques très différentes. En effet, parmi ces contraintes à prendre en compte, on peut citer notamment :

  • - la disparité de poids et la disparité de format des plis d'un lot à traiter,
  • - la disparité des caractéristiques du matériau des plis, pouvant être en paper ou en plastique par exemple et conduisant à des plis peu lisses, poreux, glacés ou très lisses,
  • - la disparité de constitution ou de consistance des plis pouvant aller de la simple feuille pliée et à points de scellement, ou de la simple carte de réponse, aux enveloppes garnies ou aux documents sous bande ou film d'emballage et/ou d'adressage.
The means of suitable presentation of the objects facing the unstacking head which equip the storage warehouse must meet numerous objectives, in particular, in the face of the constraints to be taken into account in the treatment of postal envelopes which may have very different characteristics between them. . Among these constraints to be taken into account, we can cite in particular:
  • - the disparity of weight and the disparity of format of the folds of a batch to be treated,
  • - the disparity in the characteristics of the ply material, which may be made of paper or plastic for example and leading to not very smooth, porous, glazed or very smooth folds,
  • - the disparity in the constitution or consistency of the folds, which can range from a simple folded sheet with sealing points, or a simple response card, to filled envelopes or to documents in tape or wrapping and / or addressing film .

Les moyens de présentation des plis devant la tête de dépilage doivent en conséquence assurer, au fur et à mesure de l'avance des plis vers la tête de dépilage, en particulier, le taquage latéral des plis, devant se présenter tout au moins dans la zone terminale de la pile alignés sur un de leurs bords, ainsi que la séparation des plis les uns des autres dans cette même zone terminale. Ceci permet à la tête d'effectuer la prise certaine et correcte du pli terminal mis uniquement de ce seul plis quelles que soient les caractéristiques du pli terminal et celles du plis qui le suit. Ces moyens de présentation peuvent comporter une rive latérale de taquage sur le magasin et des moyens montés dans le fond du magasin et entraînés en rotation pour pousser les plis contre la rive latérale de taquage.The means for presenting the pleats in front of the unstacking head must therefore ensure, as the pleats advance towards the unstacking head, in particular, the side jogging of the pleats, which must be presented at least in the end zone of the stack aligned on one of their edges, as well as the separation of the folds from each other in this same end zone. This allows the head to make sure and correct grip of the terminal fold put only from this single fold regardless of the characteristics of the terminal fold and those of the fold that follows it. These presentation means may include a lateral jogging edge on the magazine and means mounted in the bottom of the magazine and driven in rotation to push the folds against the lateral jogging edge.

Le document US-A 3 995 851 montre un tel dispositif de dépilage. Le magasin d'objets a une rive latérale sur sa longueur. Cette rive est en deux parties indépendantes sensiblement dans le prolongement l'une de l'autre et, avec la partie terminale en bout du magasin pouvant être rendue vibrante et coopérant avec les moyens de taquage montés dans le fond du magasin, pour une meilleure séparation des objets dans la partie terminale.Document US-A 3 995 851 shows such a destacking device. The object store has a side bank along its length. This bank is in two independent parts substantially in the extension of one another and, with the end part at the end of the magazine that can be made vibrating and cooperating with the jogging means mounted in the bottom of the magazine, for better separation. objects in the terminal part.

En variante, on peut aussi prévoir des moyens de soufflage de jets d'air sur les bords libres des plis en particulier le bord supérieur des plis, pour séparer les plis dans la zone terminale de la pile et/ou retenir le pli qui suit le pli terminal à prélever.As a variant, it is also possible to provide means for blowing air jets on the free edges of the folds, in particular the upper edge of the folds, to separate the folds in the terminal area of the stack and / or retain the fold which follows the terminal fold to be taken.

Pour améliorer cette présentation des plis devant la tête et favoriser le prélèvement du seul pli terminal, le magasin peut en outre être équipé de moyens donnant une inclinaison aux plis dans sa zone terminale de sorte que le pli terminal se présente pied à l'avant contre la butée ou la paroi d'aspiration de la tête de dépilage. Ces derniers moyens peuvent être constitués par un jeu de courroies motorisées ou une rampe de soufflage agissant sur les pieds des plis dans cette zone terminale.To improve this presentation of the folds in front of the head and favor the removal of the only terminal fold, the store can also be equipped with means giving an inclination to the folds in its terminal area so that the terminal fold is presented with the foot against the the stop or the suction wall of the unstacking head. These latter means can be constituted by a set of motorized belts or a blowing ramp acting on the feet of the folds in this terminal area.

Ces moyens de présentation des objets en particulier de plis postaux devant la tête de dépilage restent d'action inégale sur les différents plis d'un lot à traiter et conduisent à des performances demeurant insuffisantes lorsque les plis à traiter ont un spectre de caractéristiques particulièrement large.These means for presenting objects, in particular postal envelopes in front of the unstacking head, remain uneven in their action on the various envelopes of a batch to be treated and lead to performance which remains insufficient when the envelopes to be treated have a particularly broad spectrum of characteristics. .

La présente invention a pour but de réaliser un dispositif de dépilage d'objets pouvant présenter entre eux des caractéristiques très différentes conduisant par des moyens simples et de fonctionnement très fiable à des performances particulièrement améliorées.The object of the present invention is to provide a device for unstacking objects which can have very different characteristics between them, leading by particularly reliable and simple means of operation to particularly improved performance.

La présente invention a pour objet un dispositif de dépilage d'objets plats comportant un magasin recevant lesdits objets en pile, une tête de dépilage en bout du magasin, des moyens d'avance desdits objets en pile sur le magasin, le long d'une première rive latérale du magasin et vers la tête de dépilage et, dans la partie terminale du magasin définie face à la tête de dépilage où s'effectue le taquage et le redressement des objets, une deuxième rive latérale sensiblement parallèle à la première et dite rive de référence de taquage par rapport aux moyens de dépilage, des moyens de taquage des objets et des moyens de séparation des objets arrivant devant les moyens de dépilage, caractérisé en ce qu'il comporte, en outre, une troisième rive latérale dite de transition et de redressement des objets montée en bout de la première rive, s'étendant inclinée vers l'extérieur du magasin, de l'arrière à l'avant selon le sens d'avance desdits objets, sur la majeure partie, dite zone de transition et de redressement, de ladite partie terminale du magasin, ladite deuxième rive de référence lui étant disposée en décrochement et en aval uniquement en bout de ladite partie terminale du magasin.The subject of the present invention is a device for unstacking flat objects comprising a magazine receiving said objects in a stack, a unstacking head at the end of the magazine, means for advancing said objects in stack on the magazine, along a first lateral bank of the magazine and towards the unstacking head and, in the terminal part of the magazine defined facing the unstacking head where the jogging and straightening of the objects takes place, a second lateral bank substantially parallel to the first and said bank reference jogging with respect to the unstacking means, means for jogging objects and means for separating objects arriving in front of the unstacking means, characterized in that it further comprises a third lateral bank known as a transition and of straightening of objects mounted at the end of the first bank, extending inclined towards the outside of the store, from rear to front in the direction of advance of said objects, on the maje another part, known as the transition and straightening zone, of said terminal part of the magazine, said second reference bank being disposed in a recess and downstream only at the end of said terminal part of the magazine.

Selon une autre particularité de l'invention, une vis d'avance et une vis de retard des objets sont interposées entre des rouleaux de taquage avec lesquels ils sont associés au regard de la rive de transition et de redressement et de la rive de référence de taquage.According to another feature of the invention, a feed screw and a screw for delaying objects are interposed between jogging rollers with the which they are associated with regard to the transition and straightening bank and the jogging reference bank.

En particulier, la rive de transition et de redressement présente une inclinaison croissant d'amont en aval, avec l'arête supérieure de sa partie terminale plus inclinée que son arête inférieure.In particular, the transition and straightening bank has an increasing inclination from upstream to downstream, with the upper edge of its terminal part more inclined than its lower edge.

Les caractéristique et avantages de la présente invention apparaîtront plus clairement au cours de la description d'un exemple de réalisation illustré dans le dessin annexé. Dans ce dessin:

  • - la figure 1 est une vue de dessus du dispositif selon l'invention,
  • - la figure 2 est une vue en coupe du même dispositif donnée selon la ligne II-II de la figure 1,
  • - la figure 3 est une vue de dessus partielle de la partie avant du dispositif, donnée à l'échelle agrandie par rapport à la figure 1,
  • - les figures 4 et 5 sont deux vues l'une de face l'autre de dessus de l'un des éléments du dispositif selon l'invention.
The characteristics and advantages of the present invention will appear more clearly during the description of an exemplary embodiment illustrated in the appended drawing. In this drawing:
  • FIG. 1 is a top view of the device according to the invention,
  • FIG. 2 is a sectional view of the same device given along line II-II of FIG. 1,
  • FIG. 3 is a partial top view of the front part of the device, given on an enlarged scale with respect to FIG. 1,
  • - Figures 4 and 5 are two views one facing the other from above of one of the elements of the device according to the invention.

Le mode de réalisation donné dans le dessin est décrit ci-après dans le cadre du dépilage de plis postaux.The embodiment given in the drawing is described below in the context of unstacking postal folds.

Dans les figures 1 et 2, on voit que le dispositif de dépilage comporte un magasin 1 pour le stockage des plis postaux à dépiler et une tête de dépilage 2 montée en bout ou avant du magasin.In FIGS. 1 and 2, it can be seen that the unstacking device comprises a magazine 1 for storing postal folds to be unstacked and a unstacking head 2 mounted at the end or before the magazine.

La tête de dépilage 2 est illustrée du type à ventouse d'aspiration 3 montée sur un bras 4 pivotant face au pli terminal de la pile et mobile en translation latéralement devant la pile. Une butée 5 pour le pied du pli terminal de la pile est associée à la ventouse d'aspiration 3. Ce type de tête de dépilage est en tant que tel connu. Son moyen de commande a donc simplement été schématisé en 6, il entraîne la ventouse selon un mouvement de basculement aller et retour, indiqué par la flèche double 7, pour le prélèvement du pli terminal de la pile, dont le pied passe par dessus la butée 5, puis selon un mouvement de translation aller et retour, indiqué par la flèche double 8, pour le transfert latéral du pli terminal prélevé.The unstacking head 2 is illustrated of the suction cup type 3 mounted on an arm 4 pivoting facing the terminal fold of the stack and movable in translation laterally in front of the stack. A stop 5 for the foot of the terminal fold of the stack is associated with the suction cup 3. This type of unstacking head is as such known. Its control means has therefore simply been shown schematically in 6, it drives the suction cup in a back and forth tilting movement, indicated by the double arrow 7, for the removal of the terminal fold from the stack, the foot of which passes over the stop 5, then in a forward and backward translation movement, indicated by the double arrow 8, for the lateral transfer of the terminal fold taken.

Cette tête de dépilage est montée devant la face avant ouverte du magasin sur laquelle est définie la simple butée 5 pour le pied du pli terminal de la pile.This unstacking head is mounted in front of the open front face of the magazine on which the simple stop 5 for the base fold end of the stack is defined.

Le magasin 1 est du type à chargement manuel d'une pile de plis ; il est ouvert tout au moins sur sa face supérieure non référencée, a avantageusement son fond 9 incliné sur l'horizontale, avec une pente ascendante d'arrière à avant et présente une palette 10 de retenue à l'arrière de la pile. Il reçoit une pile non organisée de plis à dépiler reposant sur chant sur son fond et retenus par la palette arrière. Il a un flanc latéral interne 11 retenant le cas échéant la pile de plis lors du chargement.Tray 1 is of the type with manual loading of a stack of folds; it is open at least on its upper side which is not referenced, advantageously has its bottom 9 inclined to the horizontal, with an ascending slope from back to front and has a retaining pallet 10 at the rear of the stack. He receives an unorganized pile of pleats to be deposed resting on edge on its bottom and retained by the rear pallet. It has an internal lateral flank 11 retaining, if necessary, the stack of folds during loading.

Ce magasin est organisé, selon sa longueur considérée depuis l'arrière du magasin, en trois zones notées Zi, Z2, Zs. La zone Zi correspond à la majeure partie de sa longueur, elle constitue une zone dite d'avance des plis en pile vers la tête de dépilage. La zone Z3 de faible longueur est la zone terminale devant la tête de dépilage, elle constitue une zone dite d'attente de dépilage. La zone Z2 est la zone intermédiaire elle est dite zone de transition et de redressement des plis ; elle reçoit les plis tels qu'ils se présentent de la zone Zi et assure simultanément leur taquage et leur redressement au cours de leur passage vers la zone d'attente de dépilage Zs pour leur présentation la plus favorable possible au dépilage devant la tête de dépilage.This store is organized, according to its length considered from the rear of the store, into three zones denoted Zi, Z 2 , Zs. The zone Zi corresponds to the major part of its length, it constitutes a zone known in advance as folds in stack towards the unstacking head. Zone Z 3 of short length is the terminal zone in front of the unstacking head, it constitutes a so-called unstacking waiting zone. Zone Z 2 is the intermediate zone; it is called the transition and straightening zone of the folds; it receives the folds as they appear from the zone Zi and simultaneously ensures their jogging and their straightening during their passage towards the unstacking waiting zone Z s for their presentation as favorable as possible for unstacking in front of the head of unstacking.

Pour assurer ces fonctions attribuées ci-dessus aux zones Zi, Z2 et Z3 le long du magasin, ce magasin est différemment équipé selon ses zones.To provide these functions assigned above to zones Zi, Z 2 and Z 3 along the store, this store is differently equipped according to its areas.

Dans la zone Zi, des moyens d'entraînement assurent l'avance de la pile de plis tels qu'ils ont été chargés. Ces moyens sont constitués par un jeu de courroies sans fin de convoyage 12 montées dans le fond du magasin, en venant en légère saillie au dessus du fond. Ces courroies 12 sont tendues entre des poulies d'entraînement 13 portés par un arbre d'entraînement 14 à l'arrière du magasin et des poulies de renvoi 15 portées par un arbre de renvoi 16, sensiblement à la partie terminale de la zone d'avance Zi. Une chaîne motrice sans fin 17 court sur la longeur des zones Zi, Z2 et 23. Elle est tendue entre un pignon 18 porté par l'arbre arrière 14 et un galet de renvoi 19 monté en bout du magasin, à l'avant de l'arbre 16. Elle est couplée à un moteur 20 par un pignon 21. Elle transmet la motorisation aux courroies 12, par l'arbre 14 et les poules 13, pour l'avance des plis en pile, tels qu'ils ont été chargés. Cette avance est indiquée par la flèche F.In the zone Zi, drive means ensure the advance of the stack of folds as they have been loaded. These means consist of a set of endless conveyor belts 12 mounted in the bottom of the store, coming in slight projection above the bottom. These belts 12 are stretched between drive pulleys 13 carried by a drive shaft 14 at the rear of the magazine and return pulleys 15 carried by a return shaft 16, substantially at the end part of the zone of Zi advances. An endless drive chain 17 runs along the length of zones Z i , Z 2 and 2 3 . It is stretched between a pinion 18 carried by the rear shaft 14 and a deflection roller 19 mounted at the end of the magazine, at the front of the shaft 16. It is coupled to a motor 20 by a pinion 21. It transmits the motorization with the belts 12, by the shaft 14 and the hens 13, for advancing the folds in the stack, as they were loaded. This advance is indicated by the arrow F.

La palette de retenue 10 à l'arrière de la pile est également couplée à la chaîne 17, pour son avance en synchronisme avec la pile de plis.The retaining pallet 10 at the rear of the stack is also coupled to the chain 17, for its advance in synchronism with the stack of plies.

Cette palette est montée coulissante le long d'un guide latéral 25 sur le magasin et présente un doigt ou ergot 26 d'accrochage entre les maillons de la chaîne 17. Ce doigt ou ergot saillant au bas de la palette assure l'avance de la palette selon la flèche F pratiquement jusque la butée 5, au niveau de laquelle la chaîne, fuyant sur son galet de renvoi 19 sous le magasin, lui échappe. Le retour de la palette à l'arrière du magasin pour un nouveau chargement du magasin est assuré manuellement avec un léger pivotement de la palette évitant pendant ce retour arrière la prise de son doigt sur la chaîne alors à l'arrêt.This pallet is slidably mounted along a lateral guide 25 on the magazine and has a finger or lug 26 for hooking between the links of the chain 17. This protruding finger or lug at the bottom of the pallet ensures the advance of the pallet according to arrow F practically up to the stop 5, at which the chain, fleeing on its idler roller 19 under the magazine, escapes it. The return of the pallet to the rear of the magazine for a new loading of the magazine is ensured manually with a slight pivoting of the pallet avoiding during this rear return the catch of his finger on the chain while stopped.

Dans la zone 23 une rive latérale de taquage 30 donne la référence de taquage des plis par rapport à la tête de dépilage. Dans la zone Z2, une autre rive latérale de taquage 31 assure la transition entre le bord latéral interne 11 du magasin et la rive latérale de référence 30. Cette rive est profilée ainsi qu'il sera vu ci-après pour assurer également le redressement des plis mis en butée contre elle et se présentant trop inclinés, afin d'assurer leur présentation optimale devant la tête de dépilage dès leur passage dans la zone Zs d'attente de dépilage. Cette rive 31 est fixée sur le flanc latéral interne 11 du magasin ; elle présente à cet effet une portion terminale verticale fixée au flanc latéral interne 11 dans la zone Z1 1puis est inclinée, par rapport à l'avance des plis selon la flèche F, essentiellement le long de la zone Z2. Son extrémité dans la zone 22 est en décalage sur la rive 30 de référence de taquage de la zone Zs, qui est plus extérieure sur le magasin et se prolonge à l'arrière de la rive 31 dans la zone Z2. La rive 30 de référence de taquage est verticale.In the zone 2 3, a lateral jogging edge 30 gives the jogging reference for the plies relative to the unstacking head. In zone Z 2 , another lateral jogging edge 31 ensures the transition between the internal lateral edge 11 of the magazine and the reference lateral edge 30. This edge is profiled as will be seen below to also ensure straightening folds abutted against it and presenting themselves too inclined, in order to ensure their optimal presentation in front of the unstacking head as soon as they pass through the zone Zs for unstacking. This edge 31 is fixed to the internal lateral flank 11 of the magazine; for this purpose, it has a vertical end portion fixed to the internal lateral flank 11 in the zone Z1 1 and then is inclined, with respect to the advance of the folds according to the arrow F, essentially along the zone Z 2 . Its end in zone 2 2 is offset from the jogging reference bank 30 of zone Zs, which is more external to the magazine and is extends behind the bank 31 in zone Z 2 . The jogging reference edge 30 is vertical.

Dans les zones Z2 et Zs, aux rives 31 et 30 sont associés deux rouleaux de taquage 35 et 36 et deux vis 37 et 38 à filets hélicoïdaux à pas inverse d'une vis à l'autre et dites vis d'avance et de retard des plis.In zones Z 2 and Zs, the edges 31 and 30 are associated with two jogging rollers 35 and 36 and two screws 37 and 38 with helical threads with reverse pitch from one screw to the other and called advance and delay of folds.

En regard de la figure 1 ou 2 ou de la figure 3, on voit que ces rouleaux et vis sont montés en bout du magasin, avec les vis interposées entre les rouleaux. Ils sont d'axe parallèle à l'avance selon la flèche F des plis ; ils prolongent le fond 9 du magasin et les moyens d'avance des plis 12 qui équipent le fond 9, jusqu'à la butée 5 en étant en léger relief au dessus du niveau du fond 9. Une plaque avant de fond 39 est associée aux rouleaux et vis 35, 36 et 37, 38 ; cette plaque découpée définit des créneaux s'insérant dans les intervalles entre rouleaux et vis, et prolonge le fond 9.With reference to FIG. 1 or 2 or to FIG. 3, it can be seen that these rollers and screws are mounted at the end of the magazine, with the screws interposed between the rollers. They are of axis parallel in advance according to the arrow F of the folds; they extend the bottom 9 of the magazine and the means for advancing the folds 12 which equip the bottom 9, up to the stop 5 while being in slight relief above the level of the bottom 9. A bottom front plate 39 is associated with the rollers and screws 35, 36 and 37, 38; this cut plate defines slots inserted in the intervals between rollers and screws, and extends the bottom 9.

Sensiblement les deux-tiers des rouleaux et vis, considérés selon leur axe, appartiennent à la zone Z2 de transition et de redressement et leur portion terminale restante à la zone Zs. Le rouleau de taquage le plus interne dans le magasin 1 est monté sous la rive de taquage 31. Du fait de l'inclinaison de cette rive 31 par rapport à l'avance des plis donnée par la flèche F, la rive 31 s'étend en biais au dessus de ce rouleau 35, avec son bord terminal fuyant vers l'extérieur du magasin et en retrait sur ce rouleau 35.Significantly two-thirds of the rollers and screws, considered along their axis, belong to the transition and straightening zone Z 2 and their remaining end portion to the zone Zs. The innermost jogging roller in magazine 1 is mounted under the jogging edge 31. Due to the inclination of this edge 31 relative to the advance of the folds given by the arrow F, the edge 31 extends obliquely above this roller 35, with its trailing end edge towards the outside of the store and set back on this roller 35.

La vis filtée 37, faisant suite au rouleau 35 dans la direction transversale au magasin, est la vis d'avance des plis. Elle est filetée sur la zone Z2, soit sensiblement sur les deux tiers de sa longueur ; sa portion terminale appartenant à la zone Z3 est lisse et a sa périphérie sensiblement au niveau de celle du rouleau 35. Cette vis d'avance 37 est disposée sensiblement face à la tête de dépilage 2.The threaded screw 37, following the roller 35 in the direction transverse to the magazine, is the screw for advancing the folds. It is threaded over the zone Z 2 , ie substantially over two thirds of its length; its end portion belonging to zone Z 3 is smooth and has its periphery substantially at the same level as that of the roller 35. This advance screw 37 is disposed substantially opposite the unstacking head 2.

L'autre vis filetée 38, à la suite du rouleau 35 et de la vis d'avance 37, qui est la vis de retard des plis, n'est filetée que dans sa position terminale appartenant à la zone Z3 et tout au bout de la zone Z2. Sa portion principale, appartenant à la zone Z2 et correspondant sensiblement aux deux tiers de sa longueur, est lisse et a sa périphérie qui vient au niveau des rouleaux de taquage et contribue au taquage.The other threaded screw 38, following the roller 35 and the advancing screw 37, which is the fold delay screw, is only threaded in its end position belonging to zone Z 3 and at the very end of zone Z 2 . Its main portion, belonging to zone Z 2 and corresponding substantially to two thirds of its length, is smooth and has its periphery which comes at the level of the jogging rollers and contributes to jogging.

Le deuxième rouleau de taquage 36 s'étend entre la chaîne 17 et la vis de retard 38, sensiblement sur le côté externe du magasin.The second jogging roller 36 extends between the chain 17 and the delay screw 38, substantially on the external side of the magazine.

Les deux rouleaux de taquage 35 et 36 et les deux vis d'avance et de retard 37 et 38 sont entraînés en rotation à partir d'un même motoréducteur 40. Une courroie plate 41 et des poulies 42 auxquelles sont associées des tendeurs 43 assurent leur entraînement.The two jogging rollers 35 and 36 and the two advance and delay screws 37 and 38 are rotated from the same geared motor 40. A flat belt 41 and pulleys 42 with which tensioners 43 are associated ensure their training.

La vitesse de rotation des rouleaux et vis est choisie pour l'obtention d'une vitesse linéaire d'avance dans la zone Z2 supérieure à celle due aux corroies dans la zone Zi et une vitesse linéaire de retard dans la zone Z3 de même ordre de grandeur que celle dans la zone Zi.The speed of rotation of the rollers and screws is chosen to obtain a linear speed of advance in zone Z 2 greater than that due to the straps in zone Z i and a linear speed of delay in zone Z 3 of same order of magnitude as that in zone Z i .

A l'avant du magasin, ainsi que montré dans la figure 3, une cellule photoélectrique 45 et une lampe associée 46 assurent la détection de plis dans la zone d'attente de dépilage Zs. La lampe 46 est montée au dessus de la rive latérale de taquage 30 de la zone Z3 pratiquement en bout de rive 31, la cellule photoélectrique est montée sur le côté opposé, sensiblement au bout de la butée 5 ; elles définissent un axe de détection des plis traversant en biais la zone Zs. Cette cellule commande, lorsque le faisceau émis par la lampe est interrompu et alors non capté, en particulier lorsqu'il y a présence de plis dans la zone Zs, l'arrêt du moteur 20 assurant l'avance des plis et dans le cas contraire, sa mise en route. Elle commande aussi l'arrêt de ce moteur quand le magasin se trouve entièrement vide après une opération de dépilage, dans ces conditions la palette étant arrivée dans la zone Zs et venant interrompre le faisceau de la lampe 46.At the front of the magazine, as shown in FIG. 3, a photoelectric cell 45 and an associated lamp 46 ensure the detection of folds in the unstacking waiting zone Zs. The lamp 46 is mounted above the lateral edge jogging 30 of the zone Z 3 practically at the end of the edge 31, the photoelectric cell is mounted on the opposite side, substantially at the end of the stop 5; they define an axis of detection of the folds crossing obliquely the zone Zs. This cell controls, when the beam emitted by the lamp is interrupted and then not picked up, in particular when there are folds in the zone Z s , l stopping the motor 20 ensuring the advance of the folds and, if not, starting it up. It also controls the stopping of this motor when the magazine is completely empty after a destacking operation, under these conditions the pallet having arrived in the zone Z s and interrupting the beam of the lamp 46.

En outre à l'avant du magasin, une seconde butée 50, devant la butée 5, définit avec cette dernière une goulotte de réception du pli saisi par la ventouse 3 et de guidage du pli lors de son transfert en translation par la ventouse. Le pli saisi, qui est transféré en translation selon la flèche 8 entre les butées 5 et 50, est alors pris en charge par un système à courroies désigné globalement par la référence 51, pour son éjection et un éventuel traitement.In addition, at the front of the magazine, a second stop 50, in front of the stop 5, defines with the latter a chute for receiving the fold gripped by the suction cup 3 and for guiding the fold during its transfer in translation by the suction cup. The fold entered, which is transferred in translation along the arrow 8 between the stops 5 and 50, is then taken care of by a belt system generally designated by the reference 51, for its ejection and possible treatment.

Dans les figures 4 et 5 on a illustré séparémment et à plus grande échelle la rive de transmition et de redressement 31, vue de face et de dessus. En regard de ces figures 4 et 5 et en se référant également à la figure 1, il apparait que cette rive 31 présente tout d'abord une patte terminale verticale 53 d'accrochage sur le flanc latéral interne 11 du magasin. Des boutonnières horizontales 54 prévues sur cette patte 53 permettent un ajustage du positionnement de la rive en bout du flanc latéral interne du magasin. La rive 31 proprement dit s'entend au-delà de la patte d'accrochage 53, elle est inclinée sur la patte d'accrochage pour s'étendre vers l'extérieur du magasin et s'évase également sur la hauteur du magasin. Cette partie inclinée a une première portion plane 55 attenante à la patte verticale d'accrochage et une seconde portion galbée 56 sensiblement selon une surface tronconique. La portion plane 55 forme avec la patte d'accrochage 53 une arête biaise 58 issue de pliage, sur la face de la rive 31 tournée vers l'intérieur du magasin. L'angle de pliage, noté A est avantageusement choisi de l'ordre de 20 degrés, il donne l'inclinaison de la rive par rapport à l'avance des plis selon la flèche F. Le bord inférieur de cette portion plane 55 est parallèle au fond du magasin, son bord supérieur 59 est incli- neé pour évaser la rive en direction de l'avant du magasin.In Figures 4 and 5 there is illustrated separately and on a larger scale the bank of transmission and straightening 31, seen from the front and from above. With reference to these FIGS. 4 and 5 and with reference also to FIG. 1, it appears that this bank 31 first of all has a vertical end tab 53 for attachment to the internal lateral flank 11 of the magazine. Horizontal buttonholes 54 provided on this tab 53 allow adjustment of the positioning of the edge at the end of the internal lateral flank of the magazine. The edge 31 proper is understood beyond the latching lug 53, it is inclined on the latching lug to extend towards the outside of the store and also widens over the height of the store. This inclined part has a first flat portion 55 adjoining the vertical hooking tab and a second curved portion 56 substantially along a frustoconical surface. The flat portion 55 forms with the hooking lug 53 a bias edge 58 after folding, on the face of the bank 31 facing the interior of the store. The folding angle, noted A is advantageously chosen to be of the order of 20 degrees, it gives the inclination of the edge relative to the advance of the folds according to arrow F. The lower edge of this planar portion 55 is parallel at the bottom of the magazine, its upper edge 59 is inclined to flare the bank in the direction of the front of the magazine.

La portion galbée 56 prolonge la portion plane 55, sans transition réellement apparente avec elle. Cette transition est schématisée par la ligne pointillée 57. La portion 56 est issue de préformage, puis de polissage avec la portion 55.The curved portion 56 extends the planar portion 55, without any really visible transition therefrom. This transition is shown diagrammatically by the dotted line 57. The portion 56 results from preforming, then from polishing with the portion 55.

Le rayon de courbure de son bord inférieur est sensiblement double de celui de son bord supérieur, pour accentuer l'inclinaison, vers l'extérieur du magasin, de la partie supérieure de cette portion par rapport à celle de sa partie inférieure et ainsi réduire en hauteur l'effort, même faible, de glissement des plis sur cette portion terminale de la rive 31. On a noté dans la figure 5 les rayons de courbures R1 et R2 de ses arêtes inférieure et supérieure tangentes à la ligne 57.The radius of curvature of its lower edge is substantially double that of its upper edge, to accentuate the inclination, towards the outside of the store, of the upper part of this portion relative to that of its lower part and thus reduce even the slightest effort to slide folds on this terminal portion of the bank 31. In FIG. 5, the radii of curvature R1 and R2 of its lower and upper edges tangent to the line 57 have been noted.

Avantageusement, la face interne au magasin de cette rive 31 est recouverte d'un enduit ou d'un film d'anti-adhérence non illustré, tel qu'un film de poly- chlorure de vinyle.Advantageously, the internal face of the store of this bank 31 is covered with a coating or with a non-stick film not shown, such as a polyvinyl chloride film.

En complément de la description du dépileur donnée ci-avant, on précise des valeurs de paramètres, choisies de manière préférentielle :

  • - inclinaison du fond du magasin sur l'horizontale : 10°
  • - inclinaison de la palette sur la perpendiculaire au fond du magasin : 7°
  • - vitesse d'avance des courroies et de la chaîne : 15 mm/s
  • - pas des filets de la vis d'avance : 7mm
  • - pas des filets de la vis de retard : 3,5mm
  • - vitesse de rotation des rouleaux et vis : 250 tours/m, pour laquelle la vitesse linéaire transmise par la vis d'avance est voisine de 30 mm/s et celle linéaire donnée par la vis de retard est de 15 mm/s.
In addition to the description of the destacker given above, we specify the parameter values, chosen preferentially:
  • - inclination of the bottom of the store on the horizontal: 10 °
  • - inclination of the pallet on the perpendicular to the bottom of the store: 7 °
  • - feed speed of belts and chain: 15 mm / s
  • - threads of the feed screw: 7mm
  • - not the threads of the delay screw: 3.5mm
  • - rotation speed of the rollers and screws: 250 revolutions / m, for which the linear speed transmitted by the feed screw is close to 30 mm / s and that linear given by the delay screw is 15 mm / s.

En fonctionnement, l'avance des plis tels qu'ils ont été chargés est assurée selon la flèche F par les courroies 12. Dès l'arrivée des premiers plis dans la zone Z2, ceux-ci sont sollicités par l'action de la légère force transversale exercée sur leur pied, par friction sur les rouleaux de taquage, pour le taquage des plis contre la portion plane inclinée de la rive 31, et simultanément par l'action d'avance exercée sur leur pied par la vis d'avance. La vitesse linéaire d'avance des plis dans la zone Z2, choisie supérieure à celle d'avance de la pile dans la zone Zi, libère ces plis de la pile et permet l'action efficace des rouleaux taquage.In operation, the advance of the folds as they have been loaded is ensured according to the arrow F by the belts 12. As soon as the first folds arrive in the zone Z 2 , these are requested by the action of the slight transverse force exerted on their foot, by friction on the jogging rollers, for jogging the folds against the inclined flat portion of the bank 31, and simultaneously by the advancing action exerted on their foot by the advancing screw . The linear speed of advance of the folds in the zone Z 2 , chosen to be greater than that of the advance of the stack in the zone Z i , releases these folds from the stack and allows the effective action of the jogging rollers.

Cette action de taquage des premiers plis, mis sans pression l'un contre l'autre au cours de leur avance dans la zone Z2, conjugée avec le profil galbé de la portion terminale 56 de la rive de taquage 31, conduit au rendressement des plis trop inclinés qui sont maintenus en butée contre cette rive 31.This jogging action of the first plies, put without pressure against each other during their advance in the zone Z 2 , combined with the curved profile of the terminal portion 56 of the jogging edge 31, leads to the recovery of the folds too inclined which are held in abutment against this bank 31.

En bout de la zone Z2, le redressement des plis toujours taqués contre la rive 31 est en outre favorisé par l'action supplémentaire des filets de la vis de retard qui, combinée avec celle de la vis, d'avance, donne un effet de pivotement sur le pied des plis. Ces plis successivement redressés et libres de pression viennent dans la zone d'attente de dépilage où ils se présentent avec une inclinaison optimale sensiblement de 7° degrés devant la tête de dépilage.At the end of the zone Z 2 , the straightening of the folds still stuck against the bank 31 is further favored by the additional action of the threads of the delay screw which, combined with that of the screw, in advance, gives an effect. pivot on the base of the folds. These successively straightened and pressure-free folds come into the unstacking waiting zone where they are presented with an optimum inclination substantially of 7 ° degrees in front of the unstacking head.

Dans cette zone d'attente de dépilage Zs, les rouleaux de taquage et la portion lisse de la vis d'avance maintiennent les plis contre la rive de référence de taquage. La vis 38 de retard continue son action sur les plis ; elle donne au pli terminal un positionnement en biais de quelques degrés par rapport à la butée 5, pour éviter tout éventuel tassement de plis dans cette zone d'attente de dépilage Zs et une éventuelle poussée qui peut conduire à un collage du pli terminal contre la ventouse d'aspiration en position de repos.In this unstacking waiting zone Zs, the jogging rollers and the smooth portion of the advance screw hold the folds against the jogging reference edge. The delay screw 38 continues its action on the folds; it gives the terminal fold a bias positioning of a few degrees relative to the stop 5, to avoid any possible packing of folds in this unstacking waiting zone Zs and a possible thrust which can lead to bonding of the terminal fold against the suction cup in rest position.

La présente invention a été décrite en regard de l'ensemble de réalisation illustré. Il est évident que l'on pourra y apporter des modifications de détail et/ou remplacer certains moyens par d'autres techniquement équivalents sans sortir du cadre de l'invention. Il est évident que les valeurs des paramètres indiquées ci-avant n'ont été données que relativement les unes par rapport aux autres et ne concernent qu'une réalisation préférentielle du dispositif selon l'invention.The present invention has been described with reference to the illustrated embodiment assembly. It is obvious that it will be possible to make detailed modifications to it and / or replace certain means by others which are technically equivalent without departing from the scope of the invention. It is obvious that the values of the parameters indicated above have been given only relatively with respect to each other and relate only to a preferred embodiment of the device according to the invention.

Claims (10)

1. A device for unstacking flat objects, comprising a magazine (1) for receiving said stacked objects, an unstacking head (2) located at the end of the magazine, means (10, 12) for advancing said stacked objects across the magazine along a first lateral strip (11) of the magazine towards the unstacking head, and, in the terminal portion (Z2, Zs) of the magazine defined face to the unstacking head, where the jogging and the realigning of the objects take place, a second lateral strip (30) substantially parallel to the first one and referred to as jogging reference strip in relation to the unstacking means, jogging means (35, 36) and separating means (37) for the objects arriving in front of the unstacking means, characterized in that the device further comprises a third lateral strip (31), referred to as transition and alignment strip for the objects, mounted at the end of the first strip (11) and extending in an inclined manner towards the outside of the magazine, extending from the rear to the front according to the advance direction of said objects and over the major part, referred to as transition and alignment zone (22), of said terminal portion of the magazine, said second reference strip (30) being disposed offset and downstream thereto only at the end of the terminal portion of the magazine.
2. A device according to claim 1, characterized in that said separating means include a screw (37) for advancing said objects, said screw being inserted between the jogging means, referred to as jogging rolls (35, 36), and disposed in succession to said means (12) for advancing said objects towards said unstacking head, the axis of said advance screw being substantially parallel to the ones of the rolls and to the advance direction of said objects towards said unstacking head, said advance screw being mounted substantially face to said unstacking head, and imparting to said objects, while being jogged, a linear speed which is higher than the one of said means (12) for advancing the stacked envelopes.
3. A device according to claim 2, characterized in that said separating means further include a screw (38) for delaying said objects, said screw being interposed together with said advance screw (37) between the jogging rolls and substantially parallel to said advance screw, while being located more distant from the transition strip (31) and said alignment and jogging reference strip (30) than said advance screw and imparting to said objects an opposite linear speed of substantially the same value as that of said means (12) for advancing the stacked objects.
4. A device according to claim 3, characterized in that said advance screw (37) and said delay screw (38) are threaded only along a portion of their length within said terminal zone of the magazine, on which they define one after the other and following a first zone, referred to as advance zone (Zi) of the stacked envelopes, to which belong said means (12) for advancing stacked objects, a second zone, constituting a transition and alignment zone (Z2), to which belong substantially the threaded advance portion of the advance screw (37), said transition and alignment strip (31), the non-threaded portion of the delay screw (38) and the corresponding portion of the jogging rolls (35, 36), and a third zone, referring to as unstacking standby zone (Zs), to which belong substantially the threaded portion of the delay screw (38), said reference jogging strip (30), the non-threaded portion of the advance screw (37) and the corresponding second portion of the jogging rolls (35, 36).
5. A device according to claim 4, characterized in that the non-threaded portions of the screws (37, 38) constitute, within the zones to which they belong, jogging portions which are substantially identical to the jogging rolls.
6. A device according to anyone of the claims 1 to 5, characterized in that said transition and alignment strip (31) has, in addition, an upward inclination according to the height of the magazine, this inclination increasing from the rear towards the front of said stacked objects.
7. A device according to claim 6, characterized in that the downstream terminal portion (56) of said transition and alignment strip (31) has an upper edge which is more inclined than that of its lower edge.
8. A device according to claim 6 or 7, characterized in that said transition and alignment strip (30) is directly coupled to said first strip (11) which it extends over said terminal zone (22, 23) of the magazine, and has a skew bending ridge (58) formed on an attachment lug (53) which is substanitally parallel to the advance of said stacked objects.
9. A device according to claim 8, characterized in that said attachment lug (53) comprises elongated slots (54) for adjusting the position for the transition and alignment strip (31) across the terminal portion (Z2, 23) of the magazine.
10. A device according to anyone of the claims 1 to 9, characterized in that it includes a photoelectric cell for detecting objects and an associated lamp (45, 46) mounted on either side of said terminal portion in order to monitor in a slant direction the end of the terminal portion, which is limited laterally by said jogging reference strip (30), and in order to control said means (12) for advancing stacked objects.
EP87109802A 1986-07-09 1987-07-07 Apparatus for destacking flat objects Expired - Lifetime EP0252495B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8610007 1986-07-09
FR8610007A FR2601342B1 (en) 1986-07-09 1986-07-09 DEVICE FOR STACKING FLAT OBJECTS

Publications (2)

Publication Number Publication Date
EP0252495A1 EP0252495A1 (en) 1988-01-13
EP0252495B1 true EP0252495B1 (en) 1990-10-10

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EP87109802A Expired - Lifetime EP0252495B1 (en) 1986-07-09 1987-07-07 Apparatus for destacking flat objects

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US (1) US4757985A (en)
EP (1) EP0252495B1 (en)
CA (1) CA1289155C (en)
DE (1) DE3765474D1 (en)
FR (1) FR2601342B1 (en)

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Also Published As

Publication number Publication date
FR2601342B1 (en) 1988-09-23
CA1289155C (en) 1991-09-17
FR2601342A1 (en) 1988-01-15
US4757985A (en) 1988-07-19
DE3765474D1 (en) 1990-11-15
EP0252495A1 (en) 1988-01-13

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