EP1170228B1 - Device for controlling the means for feeding sheets in a machine - Google Patents

Device for controlling the means for feeding sheets in a machine Download PDF

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Publication number
EP1170228B1
EP1170228B1 EP01110578A EP01110578A EP1170228B1 EP 1170228 B1 EP1170228 B1 EP 1170228B1 EP 01110578 A EP01110578 A EP 01110578A EP 01110578 A EP01110578 A EP 01110578A EP 1170228 B1 EP1170228 B1 EP 1170228B1
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EP
European Patent Office
Prior art keywords
pile
level
stack
computer
sheets
Prior art date
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Expired - Lifetime
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EP01110578A
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German (de)
French (fr)
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EP1170228A3 (en
EP1170228A2 (en
Inventor
Jean-Claude Rebaud
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Bobst Mex SA
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Bobst SA
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Publication of EP1170228A3 publication Critical patent/EP1170228A3/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
    • B65H1/08—Supports or magazines for piles from which articles are to be separated with means for advancing the articles to present the articles to the separating device
    • B65H1/18—Supports or magazines for piles from which articles are to be separated with means for advancing the articles to present the articles to the separating device controlled by height of 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
    • B65H1/08—Supports or magazines for piles from which articles are to be separated with means for advancing the articles to present the articles to the separating device
    • B65H1/14—Supports or magazines for piles from which articles are to be separated with means for advancing the articles to present the articles to the separating device comprising positively-acting mechanical devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/10—Size; Dimensions
    • B65H2511/13—Thickness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/10—Size; Dimensions
    • B65H2511/15—Height, e.g. of stack
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/30—Numbers, e.g. of windings or rotations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2557/00—Means for control not provided for in groups B65H2551/00 - B65H2555/00
    • B65H2557/20—Calculating means; Controlling methods
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2557/00—Means for control not provided for in groups B65H2551/00 - B65H2555/00
    • B65H2557/30—Control systems architecture or components, e.g. electronic or pneumatic modules; Details thereof
    • B65H2557/32—Control systems architecture or components, e.g. electronic or pneumatic modules; Details thereof for modulating frequency or amplitude
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2801/00—Application field
    • B65H2801/03—Image reproduction devices
    • B65H2801/21—Industrial-size printers, e.g. rotary printing press
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S414/00—Material or article handling
    • Y10S414/10—Associated with forming or dispersing groups of intersupporting articles, e.g. stacking patterns
    • Y10S414/102—Associated with forming or dispersing groups of intersupporting articles, e.g. stacking patterns including support for group
    • Y10S414/103—Vertically shiftable
    • Y10S414/105—Shifted by article responsive means

Definitions

  • the present invention relates to a servo device organs delivering sheets from a stack, to a machine the working.
  • a device described in CH 651 807 comprising a lifting mechanism of said stack, a sheet introduction member provided with an element of gripping means for detecting the upper level of said stack comprising a front level detector of said battery connected to a computer acting on an electric motor of said elevator mechanism said stack and means for raising said stack according to said level superior.
  • a rising control pulse of this battery is sent to the engine drive that drives the lifting mechanism of the stack by pulse.
  • the duration of the pulse is modulated to obtain steps of variable size, to bring back the top surface of the stack at the same level consecutively to the departure of each sheet of this pile.
  • the object of the present invention is to remedy, at least in part to this disadvantage.
  • this invention relates to a device enslavement of the organs delivering sheets from a stack, to a machine working them, as defined by claim 1.
  • the feed station represented by FIG. 1 is of the type of that described in CH 651 807 to which reference may be made for more details. It includes a stack elevator with a lifting grid 1 suspended on chains 2. One end of each chain 2 is attached to the lifting grid 1 by means of legs 3 to the number of minus two, preferably four, placed on either side of the stack sheet supply 4. Each chain 2 is connected to its other end, to a fastener part traversed by a screw. Each chain 2 passes around a chain wheel 7 mounted on trees. the vertical drive of the lifting grid 1 by the chains 2.
  • This device may be constituted by the attachment piece which is of course guided during its movement along the screw by slides (not shown). The opinion is supported by two bearings (not shown) and driven by an engine gearbox 11 equipped with an encoder 41. It is obvious that any geared motor device able to generate the rotation of the shaft 8 secured to the wheels to 7 chains can be used.
  • the introduction station also comprises a fixed nozzle group 12 on a chassis 13 suspended at the end of at least one, in this case of at least two chains 14 by means of brackets 15.
  • the other end of the chains 14 is attached to the output axis of a linear motor 18.
  • the or the chains 14 pass around the chain wheels 22 mounted on a tree 23.
  • One of the ends of the frame 13 rests so as to be able to slide on a spacer 24 while the other is equipped with a device guide arranged in the supports 27 fixed on each of the lateral uprights 28 racks 47, 48 of the feeding station. This provision ensures an unchanged position of the squeegee group 12 with respect to the rear edge of the stack of leaves 4, when it ascends or descends under the action of the engine 18.
  • the squeegee group 12 includes several suckers 29 (only one has been shown to simplify the drawing), as well as a first detector member 30 which will be described in more detail below. It is specified that the sucking group 12 is only described to understand how feeding is done in leaves of the machine but that this known squeegee group 12 is not part of the present invention and will not be described here in all its details.
  • the first detector member 30, which comprises a crowbar 19 and a read cell 20, is placed in the vicinity of the upper part back of the stack of sheets 4 on a theoretical axis corresponding to the axis theoretical median of the stack of leaves 4.
  • a second detector member 32 is placed in front of the upper front of the stack of leaves 4 on the axis median of this pile.
  • This second detector member 32 consists of preferably by a fixed linear camera arranged in the direction of the height of the stack of sheets 4, so as to provide an analog signal depending on the measured level.
  • a retractable front stop 33 is pivotally mounted around a axis 34, near the upper level of the front face of the stack of sheets 4.
  • the pivoting movement of the front stop 33 is obtained by means of a lever 35 controlled by a cam 36, actuated by the drive device of the feeding station fed by the sheets of the stack 4.
  • This stop 33 has a window (not shown) centered on the median axis of the stack of sheets 4, to allow the detector 32 to constantly see the level top of this stack 4.
  • the first detector member 30 is electrically connected to one circuits of a computer 37 by a cable 38, while the second organ detector 32 is connected to a second circuit of the same computer 37 using of a cable 39.
  • the computer 37 receives a signal from the first detector member 30, it transmits positive or negative direction information to be transmitted by the cable 40 to the motor 18 governing the vertical movement of the sucking group 12.
  • other information provided by the second detector 32 are provided to the circuit of the computer 37 for controlling the speed of the reducing motor 11.
  • information is related to the rate of the machine, which is given by the values emitted by a pulse generator 17 indicating how often the squeegee group 12 removes the leaves from the pile 4.
  • the thickness of the leaves of cardboard constitutes the other datum introduced into the computer 37.
  • These two are the data used to determine the speed theoretical to which the gear motor 11 must raise the stack of sheets 4. This speed, calculated on the basis of these data, constitutes the speed of reducer motor reference 11.
  • the analog signal supplied to the computer by the second detector 32 allows it to evaluate in real time the gap between the upper level of the battery, measured by the second detector 32 and the higher level of reference of this stack.
  • This comparison between these two levels makes it possible to form a speed signal at the output of the calculator which will be compared to the real-time speed of the gear motor 11 provided by a encoder 41 associated with this engine.
  • the result of the comparison between these two speed signals is used to change in more or less frequency supply of the motor by means of a frequency converter 42 connected to this reducing motor 11.
  • the reduction motor 11 causes the battery to rise. sheets 4 continuously with a speed constantly adapted to the actual level of the stack compared to the reference level.
  • the introductory station may also include a auxiliary supply device 50, commonly called non-stop (NS), to perform the battery change without interruption of flow of leaf.
  • This auxiliary supply device 50 is composed of a frame 51 allowing the establishment of bars 52 supporting the battery when the grid 1 main stack climb has reached a level requiring reloading a new pile of leaves.
  • the introduction of these bars 52 under the main battery makes it possible to form an auxiliary grid then supporting the battery key so that grid 1 can be lowered back into position allowing the charging of the new battery.
  • This non-stop device is generally equipped with a drive having a kinematics similar to that of the rise of grid 1, and it comprises inter alia a gear motor 53 intended to drive wheels to 54 chain around which run the chains 55 ensuring the movement vertical frame 51.
  • the gear motor 53 is also connected to the calculator 37.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Pile Receivers (AREA)
  • Controlling Sheets Or Webs (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)

Abstract

A device for controlling delivery of sheets from a stack includes a lift for a stack of sheets. A sheet inserter removes sheets from the top of the stack to move them. A detector detects the front top level of the stack and measures the extent of variations in the level of the stack. A computer receives a measurement from the detector and acts on a first electric motor for the lift to raise the stack. A source of information connected to the computer relates to the supply frequency in real time and to the nominal thickness of the sheets. The computer output is connecting to a sheet supply frequency varying device for controlling the first motor to the lift. The computer is programmed so that the signal at its output is characteristic of the difference between the measured level of the stack and the calculated level thereof. An auxiliary supply device may support and raise the stack, based on the computer program, independently of the lift.

Description

La présente invention se rapporte à un dispositif d'asservissement des organes délivrant des feuilles à partir d'une pile, à une machine les travaillant.The present invention relates to a servo device organs delivering sheets from a stack, to a machine the working.

L'opération qui consiste à prélever successivement la feuille supérieure d'une pile de feuilles pour former une nappe de feuilles en vue de les introduire dans une machine d'impression ou de découpage est bien connue et de nombreux dispositifs réalisant cette fonction existent. Dans le cas de l'alimentation feuille à feuille de carton compact ou ondulé, on est fréquemment confronté à des problèmes de planéité, de sorte que la surface supérieure de la pile peut présenter des différences de niveau notables. Ceci est dû au fait que l'épaisseur d'une feuille de carton est susceptible de varier en fonction de plusieurs facteurs externes, tels que l'humidité ambiante, les conditions de stockage, etc., de sorte que l'on constate une différence de hauteur entre l'avant et l'arrière de la pile, de même qu'entre le centre et les bords de cette pile.The operation of taking the sheet successively top of a stack of leaves to form a sheet of leaves in order to introduce them into a printing or cutting machine is well known and many devices performing this function exist. In the case from sheet-fed to compact or corrugated board, one is frequently faced with flatness problems, so the surface The top of the stack may have noticeable level differences. This is due to the fact that the thickness of a cardboard sheet is likely to vary depending on several external factors, such as ambient humidity, storage conditions, etc., so that there is a difference in height between the front and back of the stack, as well as between the center and the edges of this pile.

On a déjà proposé de remédier à cet inconvénient grâce à un dispositif décrit dans le CH 651 807, comprenant un mécanisme élévateur de ladite pile, un organe d'introduction de feuille muni d'un élément de préhension, des moyens de détection du niveau supérieur de ladite pile comprenant un détecteur du niveau avant de ladite pile connecté à un calculateur agissant sur un moteur électrique dudit mécanisme élévateur de ladite pile et des moyens pour faire monter ladite pile en fonction dudit niveau supérieur. Lorsque le détecteur de niveau avant ne voit plus la pile de feuilles, une impulsion de commande de montée de cette pile est envoyée au moteur d'entraínement qui entraíne le mécanisme élévateur de la pile par impulsion. Selon l'épaisseur des feuilles empilées, la durée de l'impulsion est modulée pour obtenir des pas de montée de grandeur variable, permettant de ramener la surface supérieure de la pile au même niveau consécutivement au départ de chaque feuille de cette pile.It has already been proposed to remedy this drawback by means of a device described in CH 651 807, comprising a lifting mechanism of said stack, a sheet introduction member provided with an element of gripping means for detecting the upper level of said stack comprising a front level detector of said battery connected to a computer acting on an electric motor of said elevator mechanism said stack and means for raising said stack according to said level superior. When the front level sensor no longer sees the stack of leaves, a rising control pulse of this battery is sent to the engine drive that drives the lifting mechanism of the stack by pulse. Depending on the thickness of the stacked sheets, the duration of the pulse is modulated to obtain steps of variable size, to bring back the top surface of the stack at the same level consecutively to the departure of each sheet of this pile.

Si un tel dispositif permet d'améliorer sensiblement la précision du niveau supérieur de la pile et en particulier celui de la face verticale avant, il n'en demeure pas moins que la montée de la pile de feuilles par impulsions présente l'inconvénient que le moindre décalage dans les impulsions successives peut entraíner une variation dans le pas de la nappe de feuilles ainsi formée. Or, au-delà d'une certaine tolérance de ce pas, la machine qui traite la nappe de feuilles s'arrête, nécessitant une remise en marche entraínant une perte de production substantielle.If such a device makes it possible to appreciably improve the accuracy of the top level of the pile and especially that of the front vertical face it the fact remains that the rise of the pile of leaves by pulses has the disadvantage that the slightest offset in the pulses successive steps may cause a variation in the pitch of the sheet of leaves thus formed. However, beyond a certain tolerance of this step, the machine which treats the sheet of leaves stops, requiring a restart causing a substantial loss of production.

Le but de la présente invention est de remédier, au moins en partie à cet inconvénient.The object of the present invention is to remedy, at least in part to this disadvantage.

A cet effet, cette invention a pour objet un dispositif d'asservissement des organes délivrant des feuilles à partir d'une pile, à une machine les travaillant, tel que défini par la revendication 1.For this purpose, this invention relates to a device enslavement of the organs delivering sheets from a stack, to a machine working them, as defined by claim 1.

Le dessin annexé illustre, schématiquement et à titre d'exemple, une forme d'exécution du dispositif d'asservissement objet de cette invention.

  • La figure 1 est une vue de profil d'un poste d'alimentation en feuilles;
  • la figure 2 est un schéma bloc de la commande du mécanisme pour faire monter la pile d'alimentation en feuilles.
The accompanying drawing illustrates, schematically and by way of example, an embodiment of the servo device object of this invention.
  • Figure 1 is a side view of a sheet feed station;
  • Figure 2 is a block diagram of the mechanism control for mounting the sheet feed stack.

Le poste d'alimentation représenté par la figure 1 est du type de celui décrit dans le CH 651 807 auquel on pourra se référer pour plus de détails. Il comprend un élévateur de pile comportant une grille de levage 1 suspendue à des chaínes 2. L'une des extrémités de chaque chaíne 2 est attachée à la grille de levage 1 par l'intermédiaire de pattes 3 au nombre d'au moins deux, préférentiellement quatre, placées de part et d'autre de la pile d'alimentation en feuilles 4. Chaque chaíne 2 est connectée, à son autre extrémité, à une pièce d'attache traversée par une vis. Chaque chaíne 2 passe autour d'une roue à chaíne 7 montée sur des arbres 8. Un dispositif assure l'entraínement vertical de la grille de levage 1 par les chaínes 2. Ce dispositif peut-être constitué par la pièce d'attache qui est bien entendu guidée lors de son déplacement le long de la vis par des coulisses (non représentées). La vis est supportée par deux paliers (non représentés) et entraínée par un moteur réducteur 11 équipé d'un codeur 41. Il est évident que tout dispositif moto-réducteur capable de générer la rotation de l'arbre 8 solidaire des roues à chaínes 7 peut être utilisé.The feed station represented by FIG. 1 is of the type of that described in CH 651 807 to which reference may be made for more details. It includes a stack elevator with a lifting grid 1 suspended on chains 2. One end of each chain 2 is attached to the lifting grid 1 by means of legs 3 to the number of minus two, preferably four, placed on either side of the stack sheet supply 4. Each chain 2 is connected to its other end, to a fastener part traversed by a screw. Each chain 2 passes around a chain wheel 7 mounted on trees. the vertical drive of the lifting grid 1 by the chains 2. This device may be constituted by the attachment piece which is of course guided during its movement along the screw by slides (not shown). The opinion is supported by two bearings (not shown) and driven by an engine gearbox 11 equipped with an encoder 41. It is obvious that any geared motor device able to generate the rotation of the shaft 8 secured to the wheels to 7 chains can be used.

La station d'introduction comprend aussi un groupe suceur 12 fixé sur un châssis 13 suspendu à l'extrémité d'au moins une, dans le cas présent d'au moins deux chaínes 14 par l'intermédiaire de pattes de fixation 15. L'autre extrémité des chaínes 14 est fixée à l'axe de sortie d'un moteur linéaire 18. La ou les chaínes 14 passent autour des roues à chaínes 22 montées sur un arbre transversal 23. L'une des extrémités du châssis 13 repose de façon à pouvoir glisser sur une entretoise 24 alors que l'autre est munie d'un dispositif de guidage aménagé dans les supports 27 fixés sur chacun des montants latéraux 28 des bâtis 47, 48 du poste d'alimentation. Cette disposition permet d'assurer une position inchangée du groupe suceur 12 par rapport au bord arrière de la pile de feuilles 4, lorsqu'il monte ou qu'il descend sous l'action du moteur 18. Le groupe suceur 12 comprend plusieurs ventouses 29 (une seule a été représentée pour simplifier le dessin), ainsi qu'un premier organe détecteur 30 qui sera décrit plus en détail ci-après. Il est précisé que le groupe suceur 12 n'est décrit que pour comprendre comment s'effectue l'alimentation en feuilles de la machine, mais que ce groupe suceur 12 connu ne fait pas partie de la présente invention et ne sera pas décrit ici dans tous ses détails.The introduction station also comprises a fixed nozzle group 12 on a chassis 13 suspended at the end of at least one, in this case of at least two chains 14 by means of brackets 15. The other end of the chains 14 is attached to the output axis of a linear motor 18. The or the chains 14 pass around the chain wheels 22 mounted on a tree 23. One of the ends of the frame 13 rests so as to be able to slide on a spacer 24 while the other is equipped with a device guide arranged in the supports 27 fixed on each of the lateral uprights 28 racks 47, 48 of the feeding station. This provision ensures an unchanged position of the squeegee group 12 with respect to the rear edge of the stack of leaves 4, when it ascends or descends under the action of the engine 18. The squeegee group 12 includes several suckers 29 (only one has been shown to simplify the drawing), as well as a first detector member 30 which will be described in more detail below. It is specified that the sucking group 12 is only described to understand how feeding is done in leaves of the machine but that this known squeegee group 12 is not part of the present invention and will not be described here in all its details.

Le premier organe détecteur 30, qui comprend un pied de biche 19 et une cellule de lecture 20, est placé au voisinage de la partie supérieure arrière de la pile de feuilles 4 sur un axe théorique correspondant à l'axe médian théorique de la pile de feuilles 4. Un second organe détecteur 32 est placé en face de la partie supérieure avant de la pile de feuilles 4 sur l'axe médian de cette pile. Ce second organe détecteur 32 est constitué de préférence par une caméra linéaire fixe disposée dans le sens de la hauteur de la pile de feuilles 4, de manière à fournir un signal analogique fonction du niveau mesuré.The first detector member 30, which comprises a crowbar 19 and a read cell 20, is placed in the vicinity of the upper part back of the stack of sheets 4 on a theoretical axis corresponding to the axis theoretical median of the stack of leaves 4. A second detector member 32 is placed in front of the upper front of the stack of leaves 4 on the axis median of this pile. This second detector member 32 consists of preferably by a fixed linear camera arranged in the direction of the height of the stack of sheets 4, so as to provide an analog signal depending on the measured level.

Une butée avant escamotable 33 est montée pivotante autour d'un axe 34, à proximité du niveau supérieur de la face avant de la pile de feuilles 4. Le mouvement pivotant de la butée avant 33 est obtenu à l'aide d'un levier 35 commandé par une came 36, actionnée par le dispositif d'entraínement de la station d'introduction alimentée par les feuilles de la pile 4. Cette butée 33 comporte une fenêtre (non représentée) centrée sur l'axe médian de la pile de feuilles 4, pour permettre au détecteur 32 de voir constamment le niveau supérieur de cette pile 4.A retractable front stop 33 is pivotally mounted around a axis 34, near the upper level of the front face of the stack of sheets 4. The pivoting movement of the front stop 33 is obtained by means of a lever 35 controlled by a cam 36, actuated by the drive device of the feeding station fed by the sheets of the stack 4. This stop 33 has a window (not shown) centered on the median axis of the stack of sheets 4, to allow the detector 32 to constantly see the level top of this stack 4.

Le premier organe détecteur 30 est connecté électriquement à l'un des circuits d'un calculateur 37 par un câble 38, alors que le second organe détecteur 32 est relié à un second circuit de ce même calculateur 37 à l'aide d'un câble 39. Lorsque le calculateur 37 reçoit un signal provenant du premier organe détecteur 30, il émet une information de sens positif ou négatif destinée à être transmise par le câble 40 au moteur 18 régissant le mouvement vertical du groupe suceur 12. The first detector member 30 is electrically connected to one circuits of a computer 37 by a cable 38, while the second organ detector 32 is connected to a second circuit of the same computer 37 using of a cable 39. When the computer 37 receives a signal from the first detector member 30, it transmits positive or negative direction information to be transmitted by the cable 40 to the motor 18 governing the vertical movement of the sucking group 12.

Comme illustré par le schéma-bloc de la figure 2, d'autres informations que celles fournies par le second détecteur 32 sont fournies au circuit du calculateur 37 pour asservir la vitesse du moteur réducteur 11. Ces informations sont relatives à la cadence de la machine, qui est donnée par les valeurs émises par un générateur d'impulsions 17 indiquant à quelle fréquence le groupe suceur 12 enlève les feuilles de la pile 4. L'épaisseur des feuilles de carton constitue l'autre donnée introduite dans le calculateur 37. Ces deux indications constituent les données permettant de déterminer la vitesse théorique à laquelle le moteur réducteur 11 doit faire monter la pile de feuilles 4. Cette vitesse, calculée sur la base de ces données constitue la vitesse de consigne du moteur réducteur 11. Le signal analogique fourni au calculateur par le second détecteur 32 permet à celui-ci d'évaluer en temps réel l'écart entre le niveau supérieur de la pile, mesuré par le second détecteur 32 et le niveau supérieur de référence de cette pile. Cette comparaison entre ces deux niveaux permet de former un signal de vitesse à la sortie du calculateur qui sera comparé à la vitesse en temps réel du moteur réducteur 11 fournie par un codeur 41 associé à ce moteur. Le résultat de la comparaison entre ces deux signaux de vitesses est utilisé pour modifier en plus ou en moins la fréquence d'alimentation du moteur grâce à un variateur de fréquence 42 connecté à ce moteur réducteur 11. De ce fait, le moteur réducteur 11 fait monter la pile de feuilles 4 en continu avec une vitesse constamment adaptée au niveau réel de la pile comparé au niveau de référence.As illustrated by the block diagram of Figure 2, other information provided by the second detector 32 are provided to the circuit of the computer 37 for controlling the speed of the reducing motor 11. information is related to the rate of the machine, which is given by the values emitted by a pulse generator 17 indicating how often the squeegee group 12 removes the leaves from the pile 4. The thickness of the leaves of cardboard constitutes the other datum introduced into the computer 37. These two are the data used to determine the speed theoretical to which the gear motor 11 must raise the stack of sheets 4. This speed, calculated on the basis of these data, constitutes the speed of reducer motor reference 11. The analog signal supplied to the computer by the second detector 32 allows it to evaluate in real time the gap between the upper level of the battery, measured by the second detector 32 and the higher level of reference of this stack. This comparison between these two levels makes it possible to form a speed signal at the output of the calculator which will be compared to the real-time speed of the gear motor 11 provided by a encoder 41 associated with this engine. The result of the comparison between these two speed signals is used to change in more or less frequency supply of the motor by means of a frequency converter 42 connected to this reducing motor 11. As a result, the reduction motor 11 causes the battery to rise. sheets 4 continuously with a speed constantly adapted to the actual level of the stack compared to the reference level.

La station d'introduction peut également comprendre aussi un dispositif d'alimentation auxiliaire 50, communément appelé non-stop (NS), permettant d'effectuer le changement de pile sans interruption de débit de feuille. Ce dispositif d'alimentation auxiliaire 50 est composé d'un cadre 51 permettant la mise en place de barres 52 supportant la pile lorsque la grille 1 de montée de pile principale a atteint un niveau nécessitant le rechargement d'une nouvelle pile de feuilles. Ainsi, l'introduction des ces barres 52 sous la pile principale permet de former une grille auxiliaire supportant alors la pile principale de façon à ce que l'on puisse faire redescendre la grille 1 en position basse autorisant le chargement de la nouvelle pile.The introductory station may also include a auxiliary supply device 50, commonly called non-stop (NS), to perform the battery change without interruption of flow of leaf. This auxiliary supply device 50 is composed of a frame 51 allowing the establishment of bars 52 supporting the battery when the grid 1 main stack climb has reached a level requiring reloading a new pile of leaves. Thus, the introduction of these bars 52 under the main battery makes it possible to form an auxiliary grid then supporting the battery key so that grid 1 can be lowered back into position allowing the charging of the new battery.

Ce dispositif non-stop est généralement doté d'un entraínement ayant une cinématique semblable à celle de la montée de la grille 1, et il comprend entre autres un moteur-réducteur 53 destiné à entraíner des roues à chaíne 54 autour desquelles passent les chaínes 55 assurant le mouvement vertical du cadre 51. Le moteur-réducteur 53 est lui aussi connecté au calculateur 37. Lorsque les feuilles sont débitées par le groupe suceur 12 depuis ce dispositif d'alimentation auxiliaire 50, la régulation de montée de la grille 1 est utilisée par ce dispositif d'alimentation auxiliaire 50.This non-stop device is generally equipped with a drive having a kinematics similar to that of the rise of grid 1, and it comprises inter alia a gear motor 53 intended to drive wheels to 54 chain around which run the chains 55 ensuring the movement vertical frame 51. The gear motor 53 is also connected to the calculator 37. When the leaves are cut by the nozzle group 12 from this auxiliary supply device 50, the rising control of the gate 1 is used by this auxiliary supply device 50.

Claims (3)

  1. A device for controlling the means delivering sheets from a pile (4) to a machine processing them, comprising at least one mechanism (1) for lifting the pile, a sheet-inserting means comprising gripping means (29) for supplying sheets to the machine, means for detecting the upper level of the pile comprising a detector of the front level (32) of the pile (4) connected to an input of a computer (37) acting on at least one electric motor (11) of the pile-lifting mechanism (1), and means for raising the pile (4) in dependence on the upper level, characterized in that the detector of the front level (32) of the pile (4) comprises means for measuring the extent of variations in the level of the pile and in that an input of the computer (37) is also connected to a source of information (17) relating to the supply rate of the machine in real time and to the nominal thickness of the sheets, and the output of the computer (37) is connected to at least one frequency varying means (42) for controlling the electric motor or motors (11), the computer (37) being designed so that the value of the signal appearing at its output characterises the difference between the measured level of the pile (4) and the level calculated on the basis of the said nominal thickness and the supply rate and generates a variation in the frequency of the one or more varying means (42) tending to modify the forward speed of the motor (11) in order to make the measured level coincide with a set level.
  2. A device according to claim 1, characterized in that the detector (32) of the front level of the pile (4) is a linear camera disposed in the vertical direction of the pile.
  3. A device according to claim 1, characterized in that the lifting mechanism (1) is associated with an auxiliary supply device (50) controlled by a motor (53) connected to the computer (37) such that its forward speed is determined by the same information as used for controlling the one or more electric motors (11) of the lifting mechanism (1).
EP01110578A 2000-05-16 2001-04-30 Device for controlling the means for feeding sheets in a machine Expired - Lifetime EP1170228B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH00963/00A CH693850A5 (en) 2000-05-16 2000-05-16 A servo-control bodies delivering sheets to a machine.
CH9632000 2000-05-16

Publications (3)

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EP1170228A2 EP1170228A2 (en) 2002-01-09
EP1170228A3 EP1170228A3 (en) 2003-01-08
EP1170228B1 true EP1170228B1 (en) 2005-12-28

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Application Number Title Priority Date Filing Date
EP01110578A Expired - Lifetime EP1170228B1 (en) 2000-05-16 2001-04-30 Device for controlling the means for feeding sheets in a machine

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US (2) US20010042954A1 (en)
EP (1) EP1170228B1 (en)
JP (1) JP3488212B2 (en)
KR (1) KR100426418B1 (en)
CN (1) CN1141233C (en)
AT (1) ATE314297T1 (en)
AU (1) AU777199B2 (en)
BR (1) BR0101972B1 (en)
CA (1) CA2347477C (en)
CH (1) CH693850A5 (en)
DE (1) DE60116191T2 (en)
ES (1) ES2255524T3 (en)
TW (1) TW533179B (en)

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Also Published As

Publication number Publication date
DE60116191T2 (en) 2006-08-24
KR20010105195A (en) 2001-11-28
TW533179B (en) 2003-05-21
US20040061275A1 (en) 2004-04-01
DE60116191D1 (en) 2006-02-02
AU4382001A (en) 2001-11-22
BR0101972B1 (en) 2010-11-03
AU777199B2 (en) 2004-10-07
BR0101972A (en) 2001-12-26
CH693850A5 (en) 2004-03-15
CA2347477C (en) 2005-03-15
ATE314297T1 (en) 2006-01-15
EP1170228A3 (en) 2003-01-08
JP3488212B2 (en) 2004-01-19
EP1170228A2 (en) 2002-01-09
US6874780B2 (en) 2005-04-05
CN1323729A (en) 2001-11-28
KR100426418B1 (en) 2004-04-08
CN1141233C (en) 2004-03-10
US20010042954A1 (en) 2001-11-22
ES2255524T3 (en) 2006-07-01
JP2002012328A (en) 2002-01-15
CA2347477A1 (en) 2001-11-16

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