EP0349436A1 - Device for supplying sheet-like materials - Google Patents

Device for supplying sheet-like materials Download PDF

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Publication number
EP0349436A1
EP0349436A1 EP89401872A EP89401872A EP0349436A1 EP 0349436 A1 EP0349436 A1 EP 0349436A1 EP 89401872 A EP89401872 A EP 89401872A EP 89401872 A EP89401872 A EP 89401872A EP 0349436 A1 EP0349436 A1 EP 0349436A1
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EP
European Patent Office
Prior art keywords
sheets
tray
bars
jack
bar
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP89401872A
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German (de)
French (fr)
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EP0349436B1 (en
Inventor
Jean-Claude Glain
César Felix
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CMB Packaging SA
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CMB Packaging SA
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Filing date
Publication date
Application filed by CMB Packaging SA filed Critical CMB Packaging SA
Priority to AT89401872T priority Critical patent/ATE79825T1/en
Publication of EP0349436A1 publication Critical patent/EP0349436A1/en
Application granted granted Critical
Publication of EP0349436B1 publication Critical patent/EP0349436B1/en
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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
    • B65H1/00—Supports or magazines for piles from which articles are to be separated
    • B65H1/26—Supports or magazines for piles from which articles are to be separated with auxiliary supports to facilitate introduction or renewal of the pile
    • B65H1/263—Auxiliary supports for keeping the pile in the separation process during introduction of a new pile
    • 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
    • B65H1/30—Supports or magazines for piles from which articles are to be separated with means for replenishing the pile during continuous separation of articles therefrom

Definitions

  • the invention relates to a device for feeding sheet material, such as for example sheets of cardboard, paper, tinplate, aluminum, etc.
  • the invention applies to a device of this kind designed to distribute such sheets one by one to a processing or processing station.
  • the sheets are stacked on an openwork tray, generally made of wood, commonly called a pallet.
  • the invention relates more particularly to a set of means making it possible to execute automatically or almost automatically all of the operations consisting in evacuating an empty tray and in setting up another tray supporting a new stack of sheets, without interrupting the dispensing of said sheets or significant disruption of the distribution process of said sheets.
  • the tray supporting the stack of sheets is placed on a lifting mechanism which gradually raises the assembly as the sheets are distributed, to compensate for the reduction in height of the stack.
  • the tray When only a limited number of sheets remain, the tray must be removed and a new stack supported by another tray must be installed.
  • support bars commonly called sabers, are manually slid between the non-contiguous planks of the tray to support the few remaining leaves. These bars are attached to fixed supports or an auxiliary lift to continue the distribution process. After the placement of these bars, the tray is lowered and evacuated. A new stack is then placed on the lifting mechanism which is raised until the top of the stack reaches the level of the bars or sabers, which are then removed.
  • This manual process involves the mobilization of at least one operator for a non-negligible time and requires a certain dexterity on its part because the operation of the support bars can be damaging for the products, the leaves in particular risking being scratched.
  • the invention solves this problem and therefore proposes a feeding device with automatic or quasi-automatic operation, in particular making it possible to change the plates with greater ease and without risk of damaging the sheets of material.
  • the invention therefore essentially relates to a device for supplying sheet material, said sheets being stacked on an openwork tray, of the type comprising a lifting mechanism capable of supporting such a tray loaded with sheets and a mechanism temporary support for supporting a certain number of sheets during a tray change, characterized in that said support mechanism comprises a plurality of bars linked to or forming part of respective jacks capable of moving them in their own longitudinal directions under said sheets in interstices of a said plate and in that said jacks are carried by respective mobile equipment arranged to place said bars opposite such respective interstices.
  • each support bar in association with its actuating cylinder, constitutes a feeler moved by the movable equipment along the plate, for an automatic search for a said gap.
  • the sheet feeding device 11 comprises an elevating mechanism of which only a base 12 has been shown, subject to moving vertically (under the action of any suitable mechanical means), a fixed stop 13 and a movable stop 14, both perpendicular to the direction of distribution (indicated by the arrow F) of the sheets 15 and two lateral flanges 17, 18 parallel to said direction of distribution and the positioning of which is adjustable according to the format of the sheets 15 Distribution means, not shown, are arranged at the upper part of the device for picking up the sheets one by one and discharging them in the direction of the arrow F.
  • the base 12 receives a stack of sheets 15; this pile is conventionally placed on a wooden skeleton 21, commonly called a pallet.
  • Such trays often of rudimentary construction, with non-adjoining planks, naturally include interstices 22 which are used to put in place the usual support bars which have been discussed above.
  • the dimensions of the plates are neither precise nor standardized, so that the positions of said interstices inside the square or rectangular frame delimited by the stops 13, 14 and the flanges 17, 18, vary from pile to the other.
  • the tray is sometimes askew (as shown) relative to the stack of sheets proper, which accentuates the problem relative to the locations of the interstices 22.
  • the feeder 11 is further equipped with a temporary support mechanism 25 to support a number of sheets during a tray change.
  • this mechanism comprises a plurality of bars 26 (four in the example shown) linked to or forming part of pneumatic cylinders 27.
  • the assembly is such that each bar can move in its own longitudinal direction, under the remaining sheets, by engaging in the aforementioned interstices 22.
  • the jacks 27 are carried by respective moving parts 29, arranged to place the bars opposite such interstices 22.
  • each jack 27 is arranged parallel to the corresponding bar 26, perpendicular to the direction of distribution F, to reduce the size of the device, on the sides.
  • One end of the bar is coupled to the rod 27a of the cylinder.
  • the free end 30 of the bar 26 acts as a probe capable of coming into contact with one side of a plate 21 during a movement of the corresponding moving element 29. To this end, this end 30 can be rounded, as shown, or provided with a roller.
  • each bar 26 is provided with a plurality of rollers 31 arranged to come into contact with the sheets and thus avoid scratches. As can be seen in Figure 2, the rollers 31 are mounted along the bar 26 alternately projecting upward and downward.
  • Each mobile assembly, on which a cylinder 27 is mounted is essentially constituted by a pneumatic cylinder 35 fixed by means of a support 36 to one of the two flanges 17, 18.
  • each bar 26 can therefore move along a certain stroke while remaining in contact with the edge of a plate 21 (when the latter has reached the level of the bars 26) and means for supplying actuating fluid are arranged to apply at the actuator 27 a low pressure during the displacement of the movable assembly, that is to say during part of the stroke of the corresponding actuator 35 and a high pressure at the end of a probing phase.
  • actuation fluid supply means are illustrated in FIG. 3.
  • the end of a probing phase is determined by detection means 38 sensitive to the stroke of the jack 27.
  • the jack 27 is supplied by one or the other of two compressed air sources, a low pressure source BP and a high pressure source HP, via a three-way solenoid valve 40 controlled by a control unit 41 of the electromechanical type or another whose design is within the reach of the skilled person.
  • the detection means 38 comprise, for example, a cam 42 whose position is representative of the longitudinal displacement of the bar 26, and a sensor 45, for example a simple electromechanical contactor, placed to be actuated by the cam and electrically connected to control the control unit 41.
  • the output of the latter is also connected to the control input of a solenoid valve 46 controlling the isolation of the jack 35 from its control pressure and its simultaneous venting.
  • the detection means 38 are combined with fluid switching means (40, 41) connected to supply the jack 27 at a low pressure or at a high pressure.
  • the pressure switching takes place as soon as the bar 26 has engaged, during probing, by a predetermined distance in a gap of a plate.
  • the moving element is controlled by or operates in synchronism with the fluidic switching means, so as to stop the actuator 35 from displacement of the assembly constituted by the jack 27 and the bar 26 substantially simultaneously with the admission of the high pressure into the jack 27.
  • the jacks 35 define the starting positions for the bars 26, these positions being the closest to the fixed and mobile stops 13, 14.
  • the starting position is fixed for the mobile equipment located in the side of the fixed stop 13 and "floating" depending on the format of the sheets, for the mobile equipment located on the side of the mobile stop 14.
  • each actuator 35 located on the side of the mobile stop has two opposite rods, l 'one supporting the cylinder 27 and the other forming a reference probe 48 coming into contact with the movable stop 14.
  • the assembly is completed by four retractable fingers 49 which deploy in the vicinity of the edges of the sheets. Two opposite fingers are provided, arranged in the direction of the distribution axis and two others in a perpendicular direction, between the bars 26.
  • the operation is as follows.
  • the latter is then discharged and replaced by a new battery, supported by another tray.
  • the base is raised until the top of the stack is again at the level of the support bars 26.
  • the bars are then removed by actuating the jacks 27 so that the last sheets of the previous stack come to rest on the new stack. The distribution process is thus practically undisturbed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Advancing Webs (AREA)
  • Passenger Equipment (AREA)

Abstract

System for automatically changing a tray in a device for supplying sheet-like material. According to the invention, provisional bars (26) are actuated by rams (27) so as to be able to engage gaps (22) of the tray (21); the bars (26) are displaced laterally by means of rams (35) in order to seek out such gaps. <IMAGE>

Description

L'invention se rapporte à un dispositif d'alimentation de matériau en feuilles, comme par exemple des feuilles de carton, papier, fer blanc, aluminium, etc...The invention relates to a device for feeding sheet material, such as for example sheets of cardboard, paper, tinplate, aluminum, etc.

L'invention s'applique à un dispositif de ce genre conçu pour distribuer de telles feuilles une à une vers un poste de traitement ou de transformation. Dans un tel système, les feuilles sont empilées sur un plateau à claire-voie, généralement en bois, couramment appelé palette.The invention applies to a device of this kind designed to distribute such sheets one by one to a processing or processing station. In such a system, the sheets are stacked on an openwork tray, generally made of wood, commonly called a pallet.

L'invention concerne tout particulièrement un ensemble de moyens permettant d'exécuter automatiquement ou quasi-automatiquement l'ensemble des opérations consistant à évacuer un plateau vide et à mettre en place un autre plateau supportant une nouvelle pile de feuilles, sans interruption de la distribution desdites feuilles ni perturbation notable du processus de distribution desdites feuilles.The invention relates more particularly to a set of means making it possible to execute automatically or almost automatically all of the operations consisting in evacuating an empty tray and in setting up another tray supporting a new stack of sheets, without interrupting the dispensing of said sheets or significant disruption of the distribution process of said sheets.

Dans un dispositif du genre défini ci-dessus, le plateau supportant la pile de feuilles est placé sur un mécanisme élévateur qui rehausse l'ensemble progressivement au fur et à mesure que les feuilles sont distribuées, pour compenser la diminution de hauteur de la pile. Lorsqu'il ne reste qu'un nombre limité de feuilles, il faut évacuer le plateau et mettre en place une nouvelle pile supportée par un autre plateau. Si on veut éviter de perturber le processus de distribution, des barres de soutien, couramment appelées sabres, sont glissées manuellement entre les planches non jointives du plateau pour soutenir les quelques feuilles restantes. Ces barres sont solidarisées à des supports fixes ou à un élévateur auxiliaire pour poursuivre le processus de distribution. Après la mise en place de ces barres, le plateau est abaissé et évacué. Une nouvelle pile est ensuite mise en place sur le mécanisme élévateur qui est remonté jusqu'à ce que le haut de la pile arrive au niveau des barres ou sabres, lesquelles sont alors retirées. Ce processus manuel implique la mobilisation d'au moins un opérateur pendant un temps non négligeable et nécessite de sa part une certaine dextérité car la manoeuvre des barres de soutien peut être dommageable pour les produits, les feuilles risquant notamment d'être rayées.In a device of the kind defined above, the tray supporting the stack of sheets is placed on a lifting mechanism which gradually raises the assembly as the sheets are distributed, to compensate for the reduction in height of the stack. When only a limited number of sheets remain, the tray must be removed and a new stack supported by another tray must be installed. To avoid disturbing the distribution process, support bars, commonly called sabers, are manually slid between the non-contiguous planks of the tray to support the few remaining leaves. These bars are attached to fixed supports or an auxiliary lift to continue the distribution process. After the placement of these bars, the tray is lowered and evacuated. A new stack is then placed on the lifting mechanism which is raised until the top of the stack reaches the level of the bars or sabers, which are then removed. This manual process involves the mobilization of at least one operator for a non-negligible time and requires a certain dexterity on its part because the operation of the support bars can be damaging for the products, the leaves in particular risking being scratched.

Les tentatives d'automatisation de ce processus se sont jusqu'à présent heurtées à une difficulté liée aux écarts de dimension et aux variations de positionnement des plateaux ou palettes. En effet, si le plateau est décalé, ou de travers par rapport à la pile, les interstices par lesquels on peut engager lesdites barres de soutien sont à des emplacements variables et imprévisibles.Attempts to automate this process have so far encountered a difficulty related to dimensional differences and variations in positioning of the trays or pallets. Indeed, if the plate is offset, or skewed relative to the stack, the interstices through which one can engage said support bars are in variable and unpredictable locations.

L'invention permet de résoudre ce problème et propose donc un dispositif d'alimentation au fonctionnement automatique ou quasi-automatique, permettant notamment de changer les plateaux avec plus de facilité et sans risque de détériorer les feuilles de matériau.The invention solves this problem and therefore proposes a feeding device with automatic or quasi-automatic operation, in particular making it possible to change the plates with greater ease and without risk of damaging the sheets of material.

Dans cet esprit, l'invention concerne donc essentiellement un dispositif d'alimentation de matériau en feuilles, lesdites feuilles étant empilées sur un plateau à claire-voie, du type comportant un mécanisme élévateur susceptible de soutenir un tel plateau chargé de feuilles et un mécanisme de soutien provisoire pour soutenir un certain nombre de feuilles pendant un changement de plateau, caractérisé en ce que ledit mécanisme de soutien comporte une pluralité de barres liées à ou faisant partie de vérins respectifs susceptibles de les déplacer suivant leurs propres directions longitudinales sous lesdites feuilles dans des interstices d'un plateau précité et en ce que lesdits vérins sont portés par des équipages mobiles respectifs agencés pour placer lesdites barres en regard de tels interstices respectifs.In this spirit, the invention therefore essentially relates to a device for supplying sheet material, said sheets being stacked on an openwork tray, of the type comprising a lifting mechanism capable of supporting such a tray loaded with sheets and a mechanism temporary support for supporting a certain number of sheets during a tray change, characterized in that said support mechanism comprises a plurality of bars linked to or forming part of respective jacks capable of moving them in their own longitudinal directions under said sheets in interstices of a said plate and in that said jacks are carried by respective mobile equipment arranged to place said bars opposite such respective interstices.

Selon une autre particularité avantageuse de l'invention, chaque barre de soutien, en association avec son vérin d'actionnement, constitue un palpeur déplacé par l'équipage mobile le long du plateau, pour une recherche automatique d'un interstice précité.According to another advantageous feature of the invention, each support bar, in association with its actuating cylinder, constitutes a feeler moved by the movable equipment along the plate, for an automatic search for a said gap.

L'invention sera mieux comprise et d'autres avantages de celle-ci apparaîtront plus clairement à la lumière de la description qui va suivre d'un mode de réalisation possible d'un dispositif conforme à son principe, donnée uniquement à titre d'exemple et faite en référence aux dessins annexés dans lesquels:

  • - la figure 1 est une vue générale en plan d'un dispositif d'alimentation de feuilles conforme à l'invention;
  • -la figure 2 est une vue de détail montrant une barre de soutien et son vérin d'actionnement; et
  • - la figure 3 est un schéma de principe illustrant la commande de l'un des équipages mobiles du dispositif.
The invention will be better understood and other advantages thereof will appear more clearly in the light of the following description of a possible embodiment of a device in accordance with its principle, given solely by way of example and made with reference to the accompanying drawings in which:
  • - Figure 1 is a general plan view of a sheet feeding device according to the invention;
  • FIG. 2 is a detail view showing a support bar and its actuating cylinder; and
  • - Figure 3 is a block diagram illustrating the control of one of the mobile equipment of the device.

En se reportant aux dessins, le dispositif d'alimentation de feuilles 11 comporte un mécanisme élévateur dont on n'a représenté qu'une embase 12 assujettie à se déplacer verticalement (sous l'action de tout moyen mécanique convenable), une butée fixe 13 et une butée mobile 14, toutes deux perpendiculaires à la direction de distribution (indiquée par la flèche F) des feuilles 15 et deux flasques latéraux 17, 18 parallèles à ladite direction de distribution et dont le positionnement est réglable en fonction du format des feuilles 15. Des moyens de distribution, non représentés, sont agencés à la partie supérieure du dispositif pour prélever les feuilles une par une et les évacuer dans la direction de la flèche F. L'embase 12 reçoit une pile de feuilles 15; cette pile est classiquement posée sur un plateau à claire-voie 21, en bois, couramment appelé palette. De tels plateaux, de construction souvent rudimentaire, à planches non jointives, comportent naturellement des interstices 22 qui sont mis à profit pour la mise en place des habituelles barres de soutien dont il a été question ci-dessus. Cependant, les dimensions des plateaux ne sont ni précises, ni normalisées, de sorte que les positions desdits interstices à l'intérieur du cadre carré ou rectangulaire délimité par les butées 13, 14 et les flasques 17, 18, varient d'une pile à l'autre. D'autre part, le plateau se présente parfois de travers (comme représenté) par rapport à la pile de feuilles proprement dite, ce qui accentue le problème relativement aux emplacements des interstices 22.Referring to the drawings, the sheet feeding device 11 comprises an elevating mechanism of which only a base 12 has been shown, subject to moving vertically (under the action of any suitable mechanical means), a fixed stop 13 and a movable stop 14, both perpendicular to the direction of distribution (indicated by the arrow F) of the sheets 15 and two lateral flanges 17, 18 parallel to said direction of distribution and the positioning of which is adjustable according to the format of the sheets 15 Distribution means, not shown, are arranged at the upper part of the device for picking up the sheets one by one and discharging them in the direction of the arrow F. The base 12 receives a stack of sheets 15; this pile is conventionally placed on a wooden skeleton 21, commonly called a pallet. Such trays, often of rudimentary construction, with non-adjoining planks, naturally include interstices 22 which are used to put in place the usual support bars which have been discussed above. However, the dimensions of the plates are neither precise nor standardized, so that the positions of said interstices inside the square or rectangular frame delimited by the stops 13, 14 and the flanges 17, 18, vary from pile to the other. On the other hand, the tray is sometimes askew (as shown) relative to the stack of sheets proper, which accentuates the problem relative to the locations of the interstices 22.

Le dispositif d'alimentation 11 est en outre équipé d'un mécanisme de soutien provisoire 25 pour soutenir un certain nombre de feuilles pendant un changement de plateau. Selon l'invention, ce mécanisme comporte une pluralité de barres 26 (quatre dans l'exemple représenté) liées à ou faisant partie de vérins 27, pneumatiques. Le montage est tel que chaque barre puisse se déplacer suivant sa propre direction longitudinale, sous les feuilles restantes, en s'engageant dans des interstices 22 précités. En outre, les vérins 27 sont portés par des équipages mobiles 29 respectifs, agencés pour placer les barres en regard de tels interstices 22. Dans l'exemple représenté, chaque vérin 27 est disposé parallèlement à la barre 26 correspondante, perpendiculairement à la direction de distribution F, pour réduire l'encombrement de l'appareil, sur les côtés. Une extrémité de la barre est donc couplée à la tige 27a du vérin. L'extrémité libre 30 de la barre 26 fait office de palpeur susceptible d'entrer en contact avec un côté d'un plateau 21 pendant un déplacement de l'équipage mobile 29 correspondant. A cet effet, cette extrémité 30 peut être arrondie, comme représenté, ou munie d'un galet de roulement. De plus, chaque barre 26 est munie d'une pluralité de galets de roulement 31 disposés pour rentrer en contact avec les feuilles et éviter ainsi les rayures. Comme cela est visible sur la figure 2, les galets 31 sont montés le long de la barre 26 en dépassant alternativement vers le haut et vers le bas. Chaque équipage mobile, sur lequel est monté un vérin 27, est essentiellement constitué par un vérin pneumatique 35 fixé par l'intermédiaire d'un support 36 à l'un des deux flasques 17, 18. L élongation de ce vérin 35 conditionne donc la position de l'ensemble constitué par la barre 26 et le vérin 27 le long d'un côté de la pile. L'extrémité 30, formant palpeur, de chaque barre 26 peut donc se déplacer le long d'une certaine course en restant en contact avec le bord d'un plateau 21 (lorsque celui-ci est parvenu au niveau des barres 26) et des moyens d'alimentation en fluide d'actionnement sont agencés pour appliquer au vérin 27 une basse pression pendant le déplacement de l équipage mobile, c'est-à-dire pendant une partie de la course du vérin 35 correspondant et une haute pression à la fin d'une phase de palpage. Ces moyens d'alimentation en fluide d actionnement sont illustrés à la figure 3. La fin d'une phase de palpage est déterminée par des moyens de détection 38 sensibles à la course du vérin 27. Dans l'exemple spécifiquement décrit, le vérin 27 est alimenté par l'une ou l'autre de deux sources d'air comprimé, une source à basse pression BP et une source à haute pression HP, via une électrovanne à trois voies 40 pilotée par une unité de commande 41 de type électromécanique ou autre dont la conception est à la portée de l'homme du métier. Les moyens de détection 38 comportent, par exemple, une came 42 dont la position est représentative du déplacement longitudinal de la barre 26, et un capteur 45, par exemple un simple contacteur électromécanique, placé pour être actionné par la came et connecté électriquement pour piloter l'unité de commande 41. La sortie de cette dernière est aussi reliée à l'entrée de commande d'une électrovanne 46 commandant l'isolement du vérin 35 de sa pression de commande et sa mise à l'air libre simultanée. On conçoit donc que les moyens de détection 38 sont combinés à des moyens de commutation fluidique (40, 41) connectés pour alimenter le vérin 27 à une basse pression ou à une haute pression. La commutation de pression se fait dès que la barre 26 s'est engagée, au cours du palpage, d'une distance prédéterminée dans un interstice d'un plateau. En outre, il apparaît que, grâce à la liaison entre l'unité de commande 41 et l'électrovanne 46, l'équipage mobile est commandé par ou fonctionne en synchronisme avec les moyens de commutation fluidique, de façon à arrêter le vérin 35 de déplacement de l'ensemble constitué par le vérin 27 et la barre 26 sensiblement simultanément à l'admission de la haute pression dans le vérin 27.The feeder 11 is further equipped with a temporary support mechanism 25 to support a number of sheets during a tray change. According to the invention, this mechanism comprises a plurality of bars 26 (four in the example shown) linked to or forming part of pneumatic cylinders 27. The assembly is such that each bar can move in its own longitudinal direction, under the remaining sheets, by engaging in the aforementioned interstices 22. In addition, the jacks 27 are carried by respective moving parts 29, arranged to place the bars opposite such interstices 22. In the example shown, each jack 27 is arranged parallel to the corresponding bar 26, perpendicular to the direction of distribution F, to reduce the size of the device, on the sides. One end of the bar is coupled to the rod 27a of the cylinder. The free end 30 of the bar 26 acts as a probe capable of coming into contact with one side of a plate 21 during a movement of the corresponding moving element 29. To this end, this end 30 can be rounded, as shown, or provided with a roller. In addition, each bar 26 is provided with a plurality of rollers 31 arranged to come into contact with the sheets and thus avoid scratches. As can be seen in Figure 2, the rollers 31 are mounted along the bar 26 alternately projecting upward and downward. Each mobile assembly, on which a cylinder 27 is mounted, is essentially constituted by a pneumatic cylinder 35 fixed by means of a support 36 to one of the two flanges 17, 18. The elongation of this cylinder 35 therefore conditions the position of the assembly constituted by the bar 26 and the jack 27 along one side of the stack. The end 30, forming a feeler, of each bar 26 can therefore move along a certain stroke while remaining in contact with the edge of a plate 21 (when the latter has reached the level of the bars 26) and means for supplying actuating fluid are arranged to apply at the actuator 27 a low pressure during the displacement of the movable assembly, that is to say during part of the stroke of the corresponding actuator 35 and a high pressure at the end of a probing phase. These actuation fluid supply means are illustrated in FIG. 3. The end of a probing phase is determined by detection means 38 sensitive to the stroke of the jack 27. In the example specifically described, the jack 27 is supplied by one or the other of two compressed air sources, a low pressure source BP and a high pressure source HP, via a three-way solenoid valve 40 controlled by a control unit 41 of the electromechanical type or another whose design is within the reach of the skilled person. The detection means 38 comprise, for example, a cam 42 whose position is representative of the longitudinal displacement of the bar 26, and a sensor 45, for example a simple electromechanical contactor, placed to be actuated by the cam and electrically connected to control the control unit 41. The output of the latter is also connected to the control input of a solenoid valve 46 controlling the isolation of the jack 35 from its control pressure and its simultaneous venting. It will therefore be understood that the detection means 38 are combined with fluid switching means (40, 41) connected to supply the jack 27 at a low pressure or at a high pressure. The pressure switching takes place as soon as the bar 26 has engaged, during probing, by a predetermined distance in a gap of a plate. In addition, it appears that, thanks to the connection between the control unit 41 and the solenoid valve 46, the moving element is controlled by or operates in synchronism with the fluidic switching means, so as to stop the actuator 35 from displacement of the assembly constituted by the jack 27 and the bar 26 substantially simultaneously with the admission of the high pressure into the jack 27.

Au début de chaque cycle de changement de plateau, les vérins 35 définissent des positions de départ pour les barres 26, ces positions étant les plus rapprochées des butées fixes et mobiles 13, 14. La position de départ est fixe pour les équipages mobiles situés du côté de la butée fixe 13 et "flottante" en fonction du format des feuilles, pour les équipages mobiles situés du côté de la butée mobile 14. Pour ce faire, chaque vérin 35 situé du côté de la butée mobile comporte deux tiges opposées, l'une supportant le vérin 27 et l'autre formant palpeur de référence 48 venant en contact avec la butée mobile 14. L'ensemble est complété par quatre doigts rétractables 49 venant se déployer au voisinage des bords des feuilles. On prévoit deux doigts opposés disposés suivant la direction de l'axe de distribution et deux autres suivant une direction perpendiculaire, entre les barres 26.At the start of each plate change cycle, the jacks 35 define the starting positions for the bars 26, these positions being the closest to the fixed and mobile stops 13, 14. The starting position is fixed for the mobile equipment located in the side of the fixed stop 13 and "floating" depending on the format of the sheets, for the mobile equipment located on the side of the mobile stop 14. To do this, each actuator 35 located on the side of the mobile stop has two opposite rods, l 'one supporting the cylinder 27 and the other forming a reference probe 48 coming into contact with the movable stop 14. The assembly is completed by four retractable fingers 49 which deploy in the vicinity of the edges of the sheets. Two opposite fingers are provided, arranged in the direction of the distribution axis and two others in a perpendicular direction, between the bars 26.

Le fonctionnement est le suivant.The operation is as follows.

Lorsque l'embase 12 a atteint une certaine hauteur et que le plateau (ne comportant plus qu'une faible quantité de feuilles) se trouve à hauteur des barres 26, la basse pression est admise dans les vérins 27 en même temps que les vérins 35 sont alimentés pour commencer à engendrer le palpage des bords du plateau par les différentes extrémités 30 des barres 26. Chaque barre finit ainsi par rencontrer un interstice 22 et s'y engager. Lorsqu'une barre est suffisamment engagée dans l'interstice, la came 42 correspondante actionne le contacteur 45, ce qui commande à la fois l'augmentation de pression dans le vérin 27 et l'arrêt du vérin 35 qui est alors rendu libre . La barre 26 peut alors s'engager au maximum dans l'interstice. Lorsque les quatre barres sont engagées, les feuilles, qui restent sur le plateau, sont soutenues et l'embase 12 peut être abaissée avec ledit plateau vide. Ce dernier est alors évacué et remplacé par une nouvelle pile, supportée par un autre plateau. L'embase est rehaussée jusqu'à ce que le haut de la pile soit à nouveau au niveau des barres de soutien 26. Les barres sont alors retirées par actionnement des vérins 27 de sorte que les dernières feuilles de la pile précédente viennent reposer sur la nouvelle pile. Le processus de distribution n'est ainsi pratiquement pas perturbé.When the base 12 has reached a certain height and the plate (comprising only a small quantity of sheets) is at the height of the bars 26, low pressure is admitted into the jacks 27 at the same time as the jacks 35 are fed to begin to generate the probing of the edges of the plate by the different ends 30 of the bars 26. Each bar thus ends up meeting a gap 22 and engaging therein. When a bar is sufficiently engaged in the gap, the corresponding cam 42 actuates the contactor 45, which controls both the increase in pressure in the jack 27 and the stop of the jack 35 which is then made free. The bar 26 can then engage as far as possible in the gap. When the four bars are engaged, the sheets, which remain on the tray, are supported and the base 12 can be lowered with said empty tray. The latter is then discharged and replaced by a new battery, supported by another tray. The base is raised until the top of the stack is again at the level of the support bars 26. The bars are then removed by actuating the jacks 27 so that the last sheets of the previous stack come to rest on the new stack. The distribution process is thus practically undisturbed.

Claims (7)

1- Dispositif d'alimentation de matériau en feuilles (15), lesdites feuilles étant empilées sur un plateau à claire-voie (21), du type comportant un mécanisme élévateur susceptible de soutenir un tel plateau chargé de feuilles et un mécanisme de soutien provisoire (25) pour soutenir un certain nombre de feuilles pendant un changement de plateau, caractérisé en ce que ledit mécanisme de soutien provisoire (25) comporte une pluralité de barres (26) liées à ou faisant partie de vérins (27) respectifs susceptibles de les déplacer suivant leurs propres directions longitudinales sous lesdites feuilles dans des interstices (22) d'un plateau précité et en ce que lesdits vérins sont portés par des équipages mobiles (29) respectifs agencés pour placer lesdites barres en regard de tels interstices respectifs.1- Device for feeding sheet material (15), said sheets being stacked on an openwork tray (21), of the type comprising a lifting mechanism capable of supporting such a tray loaded with sheets and a provisional support mechanism (25) for supporting a certain number of sheets during a tray change, characterized in that said temporary support mechanism (25) comprises a plurality of bars (26) connected to or forming part of respective cylinders (27) capable of moving them move in their own longitudinal directions under said sheets in interstices (22) of a said plate and in that said cylinders are carried by respective moving parts (29) arranged to place said bars opposite such respective interstices. 2- Dispositif selon la revendication 1, caractérisé en ce que l'extrémité libre (30) de chaque barre (26) constitue un palpeur susceptible d'entrer en contact avec un côté d'un tel plateau (21) pendant un déplacement de l'équipage mobile (29) correspondant, et en ce que des moyens d'alimentation en fluide d'actionnement de ce vérin (27) sont agencés pour lui appliquer une basse pression (BP) pendant ledit déplacement de l'équipage mobile et une haute pression (HP) à la fin d'une phase de palpage.2- Device according to claim 1, characterized in that the free end (30) of each bar (26) constitutes a probe capable of coming into contact with one side of such a plate (21) during a movement of the mobile equipment (29) corresponding, and in that means for supplying actuating fluid to this jack (27) are arranged to apply a low pressure (BP) during said movement of the mobile equipment and a high pressure (HP) at the end of a probing phase. 3- Dispositif selon la revendication 2, caractérisé en ce qu'il comprend des moyens de détection (42, 45) sensibles à la course dudit vérin (27) et des moyens de commutation fluidique (40) connectés pour alimenter ledit vérin à une basse pression ou à une haute pression.3- Device according to claim 2, characterized in that it comprises detection means (42, 45) sensitive to the stroke of said cylinder (27) and fluid switching means (40) connected to supply said cylinder at a low pressure or high pressure. 4- Dispositif selon la revendication 3, caractérisé en ce que chaque équipage mobile est commandé en déplacement par ou en synchronisme avec lesdits moyens de commutation fluidique pour arrêter ledit déplacement sensiblement simultanément à l'admission de la haute pression dans ledit vérin.4- Device according to claim 3, characterized in that each moving element is controlled to move by or in synchronism with said fluid switching means to stop said movement substantially simultaneously with the admission of high pressure into said cylinder. 5- Dispositif selon la revendication 4, caractérisé en ce que ledit équipage mobile (29) comporte un vérin (35) et en ce que des moyens de commutation commandés (46) sont agencés pour isoler ce vérin (35) de sa pression de commande.5- Device according to claim 4, characterized in that said movable assembly (29) comprises a jack (35) and in that controlled switching means (46) are arranged to isolate this jack (35) from its control pressure . 6- Dispositif selon l'une des revendications précédentes, caractérisé en ce que chaque barre de soutien provisoire (26) est pourvue de galets de roulement (31) disposés pour entrer en contact avec lesdites feuilles.6- Device according to one of the preceding claims, characterized in that each provisional support bar (26) is provided with rollers (31) arranged to come into contact with said sheets. 7- Dispositif selon la revendication 6, caractérisé en ce que ces galets (31) sont montés le long de cette barre en dépassant alternativement vers le haut et vers le bas.7- Device according to claim 6, characterized in that these rollers (31) are mounted along this bar projecting alternately upward and downward.
EP89401872A 1988-06-29 1989-06-29 Device for supplying sheet-like materials Expired - Lifetime EP0349436B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89401872T ATE79825T1 (en) 1988-06-29 1989-06-29 DEVICE FOR FEEDING SHEET MATERIAL.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8808750A FR2633598B1 (en) 1988-06-29 1988-06-29 SHEET MATERIAL FEEDING DEVICE
FR8808750 1988-06-29

Publications (2)

Publication Number Publication Date
EP0349436A1 true EP0349436A1 (en) 1990-01-03
EP0349436B1 EP0349436B1 (en) 1992-08-26

Family

ID=9367858

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89401872A Expired - Lifetime EP0349436B1 (en) 1988-06-29 1989-06-29 Device for supplying sheet-like materials

Country Status (7)

Country Link
EP (1) EP0349436B1 (en)
AT (1) ATE79825T1 (en)
DE (1) DE68902606T2 (en)
ES (1) ES2034694T3 (en)
FR (1) FR2633598B1 (en)
GR (1) GR3006196T3 (en)
PT (1) PT91007B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0897883A1 (en) * 1997-08-19 1999-02-24 MAN Roland Druckmaschinen AG Method and device for positioning in an automatic pile changer

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005022868A (en) 2003-06-30 2005-01-27 Heidelberger Druckmas Ag Device for receiving auxiliary piled-up paper sheets during renewal of main piled up paper sheets at feeding of sheets of paper to printing-technical machine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1095297B (en) * 1958-03-25 1960-12-22 Mabeg Maschb G M B H Nachf Hen Sheet feeder with several pile hoists
FR1415298A (en) * 1964-03-06 1965-10-22 Schnellpressenfab Heidelberg Paper stack table for continuous feed feeder
FR2354272A1 (en) * 1976-06-09 1978-01-06 Jurine Powered hoist feeder for stacks of sheets - has frames with four axles running in vertical grooves and alignment mechanism on unloading side of stack
GB2059390A (en) * 1979-10-02 1981-04-23 Sig Schweiz Industrieges Apparatus for separating sheets of packing material

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1095297B (en) * 1958-03-25 1960-12-22 Mabeg Maschb G M B H Nachf Hen Sheet feeder with several pile hoists
FR1415298A (en) * 1964-03-06 1965-10-22 Schnellpressenfab Heidelberg Paper stack table for continuous feed feeder
FR2354272A1 (en) * 1976-06-09 1978-01-06 Jurine Powered hoist feeder for stacks of sheets - has frames with four axles running in vertical grooves and alignment mechanism on unloading side of stack
GB2059390A (en) * 1979-10-02 1981-04-23 Sig Schweiz Industrieges Apparatus for separating sheets of packing material

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0897883A1 (en) * 1997-08-19 1999-02-24 MAN Roland Druckmaschinen AG Method and device for positioning in an automatic pile changer

Also Published As

Publication number Publication date
GR3006196T3 (en) 1993-06-21
EP0349436B1 (en) 1992-08-26
ES2034694T3 (en) 1993-04-01
PT91007A (en) 1989-12-29
PT91007B (en) 1994-06-30
ATE79825T1 (en) 1992-09-15
DE68902606D1 (en) 1992-10-01
FR2633598A1 (en) 1990-01-05
DE68902606T2 (en) 1993-04-08
FR2633598B1 (en) 1991-04-05

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