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EP1228994B1 - Sheet transport device - Google Patents

Sheet transport device Download PDF

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Publication number
EP1228994B1
EP1228994B1 EP02001294A EP02001294A EP1228994B1 EP 1228994 B1 EP1228994 B1 EP 1228994B1 EP 02001294 A EP02001294 A EP 02001294A EP 02001294 A EP02001294 A EP 02001294A EP 1228994 B1 EP1228994 B1 EP 1228994B1
Authority
EP
European Patent Office
Prior art keywords
station
independent motor
reductor
sheets
converting
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
EP02001294A
Other languages
German (de)
French (fr)
Other versions
EP1228994A3 (en
EP1228994A2 (en
Inventor
Mauro Chiari
Daniel Tapis
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.)
Bobst Mex SA
Original Assignee
Bobst SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bobst SA filed Critical Bobst SA
Publication of EP1228994A2 publication Critical patent/EP1228994A2/en
Publication of EP1228994A3 publication Critical patent/EP1228994A3/en
Application granted granted Critical
Publication of EP1228994B1 publication Critical patent/EP1228994B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/02—Delivering or advancing articles from machines; Advancing articles to or into piles by mechanical grippers engaging the leading edge only of the articles
    • B65H29/04—Delivering or advancing articles from machines; Advancing articles to or into piles by mechanical grippers engaging the leading edge only of the articles the grippers being carried by endless chains or bands
    • B65H29/042—Intermediate conveyors, e.g. transferring devices
    • B65H29/044—Intermediate conveyors, e.g. transferring devices conveying through a machine
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/44—Moving, forwarding, guiding material
    • B65H2301/449—Features of movement or transforming movement of handled material
    • B65H2301/4493—Features of movement or transforming movement of handled material intermittent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2403/00—Power transmission; Driving means
    • B65H2403/90—Machine drive
    • B65H2403/94—Other features of machine drive
    • B65H2403/943—Electronic shaft arrangement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2513/00—Dynamic entities; Timing aspects
    • B65H2513/20—Acceleration or deceleration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2513/00—Dynamic entities; Timing aspects
    • B65H2513/40—Movement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2513/00—Dynamic entities; Timing aspects
    • B65H2513/50—Timing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2553/00—Sensing or detecting means
    • B65H2553/51—Encoders, e.g. linear
    • 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
    • B65H2701/17—Nature of material
    • B65H2701/176—Cardboard
    • 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
    • B65H2801/42—Die-cutting

Definitions

  • the present invention relates to a sheet conveying device, in a press for forming sheets of paper or cardboard comprising at least one sheet feeding station, a forming station, a waste ejection station and a station for receiving the shaped sheets, said transport device comprising two endless chain trains arranged to transport the sheets from the introduction station to the receiving station, a transverse drive shaft carrying drive wheels of the endless chain trains and at least one sheet gripper attached to the endless chain trains.
  • transverse here designates a direction horizontal and perpendicular to the machine axis.
  • a single electric motor usually drives the entire machine.
  • This motor directly drives a flywheel, a clutch-brake device being interposed between this wheel and the rest of the machine.
  • This system drives all the elements operating in synchronism, in particular the movable bed base of the cutting board, the waste ejection and receiving stations, as well as the chain trains carrying the gripper bars for gripping and transporting. leaves from one station to the next.
  • a training and forming cycle of a sheet comprises a stopping phase of the sheet during which it undergoes a shaping operation, such as cutting or ejecting waste, and at least one movement phase during which the sheet is brought from one station to the next.
  • This movement phase necessarily comprises an acceleration phase and a deceleration phase, and, in general, between the two, a phase where the sheet moves at approximately constant speed.
  • the patent CH-411.555 proposes to place the drive of the toothed sector under the control of two cams imparting a rocking motion to a lever which, via a connecting rod drives the toothed sector, while among the two elements of the lever cooperating with the two cams, one, which transmits to the toothed sector the movement back empty, is elastically pressed against the cam.
  • the cam system makes it possible to modify the law of movement by softening the starting; however, for a given cam set, this motion law can no longer be modified except to change cams.
  • the document US-5,348,285 discloses a forming machine, in particular a platen press for sheets of paper or similar objects, operating in phases.
  • the machine comprises an introduction of the sheets, a forming station with a cutting board, a waste disposal and a receiving station shaped sheets.
  • the leaves are transported from the introduction to the receiving station by an endless chain conveyor equipped with sheet grippers.
  • the receiving station includes an endless conveyor belt conveyor to limit leaf deformations.
  • the insertion movement of the sheets is synchronized with the movement of the endless belt of the receiving station.
  • the object of the present invention is to provide a device for transporting sheets allowing high speeds while allowing to achieve at will an optimal training cycle leaves without too violent accelerations likely to break the points of attachment between the poses composing a leaf.
  • Another object of the invention is to allow the modification of the pace of a leaf drive cycle independently of the training cycle of the forming station.
  • the modification of the pace of a leaf drive cycle consists in acting on the acceleration and deceleration curves and the respective durations of the phases of a cycle depending on the type of work to be performed, without having to do so. proceed, between two works, exchanges of parts of the device of transport of leaves.
  • a sheet conveying device in a paper or cardboard forming press having at least one sheet feeding station, a converting station, a waste ejection station and a station for receiving the shaped sheets, said transport device comprising two endless chain trains arranged to transport the sheets from the introduction station to the receiving station, a transverse drive shaft carrying drive wheels of the endless chain trains and at least one sheet gripper attached to the endless chain trains, a sheet conveying device in which said transverse drive shaft is driven separately from the drive of the other press stations by at least one independent motor , said independent motor being a motor capable of operating by training cycles comprising at least one phase of movement and a deceleration and / or stop phase controlled by a control device, the duration of each drive cycle of the independent motor being equal to the duration of a shaping cycle of said forming station.
  • a control device driving the independent motor by delivering a suitable electric current is able to adjust with much more flexibility than a mechanical device, the characteristics of the acceleration phase, the deceleration phase and the stopping phase of the transport device.
  • the drive via the independent motor makes it possible in particular to better adjust the relative durations of the phases of movement and stopping of the train of chains with the stopping and moving phases of the cutting plate and, consequently, to reduce the duration of the stop phase of the platen, which increases the overall rate of the machine.
  • FIGS. 1a and 1b show an independent motor / gear unit 1 implanted in direct contact with an extension of the transverse drive shaft 2 which carries the driving wheels 3, 3 'endless chain trains 5, 6 of a forming press.
  • the motor is located at the compartment 4 which, in a prior art forming press, contained the parts of the mechanical drive device of the chain trains 5, 6 and the coupling parts with the motor driving the various stations of the press, parts which are here suppressed.
  • This independent motor / gearbox 1 can be implanted without modification of the whole of an existing machine.
  • the motor can also be implanted in a so-called “mirrored” position, that is to say on the opposite end of the transverse drive shaft of the chain train, so also in the so-called “driver's side” position CC in position "opposite side to driver” COC.
  • the independent motor / gearbox 1 can also be mounted in a position between the frames 7, 8 and drive the transverse shaft 2 by known means such as pinions, belts, chains, which makes it possible to remove the lateral compartment or compartments 4. drive and gain space.
  • the independent motor / gearbox driving the endless chain trains 5, 6 is preferably a high dynamic control electric motor.
  • This independent motor / gearbox 1 can be chosen from synchronous, asynchronous, DC, brake or non-brake motors, commercially available.
  • a synchronous brushless drive comprising a motor of the HXA60VH type marketed by ABB Normelec SA (Switzerland) enabled the endless chain trains 5, 6 d to be driven. a forming press at high speeds, by eliminating the original mechanical drives of this machine.
  • Several manufacturers offer electric motors in standard versions that can develop torques of 200-500 Nm, making it possible to reach chain train acceleration from 25 to 70m / s 2 . The cost of such standard motors is lower than the cost of all mechanical parts of known devices.
  • the figure 2 shows the circuit diagram of the electronic control device of the independent motor / gearbox 1.
  • the control device, CDE receives from an absolute and incremental encoder 9 a signal giving the exact position of the cutting board 10, this signal serving as real master to the entire system.
  • the command CDE also receives from an absolute and incremental encoder the absolute position of the string trains 5, 6; the command CDE finally receives the angular position of the independent motor / gearbox 1 detected by the absolute and incremental encoder 12.
  • the comparison of these signals enables the electronic control CDE to determine exactly the locking and unlocking times of the independent motor / gearbox 1 , that is to say to determine the beginning and the end of the stopping phase and to give the current / voltage supply instructions determining, at all times, the accelerations and the speeds of the independent motor / gearbox 1.
  • the figure 3 shows on the same graph five curves 13 to 17, showing in arbitrary units, for the curve 13, the voltage, for the curve 14, the intensity of the current supplying the motor / independent reducer 1, for the curve 15, the acceleration for the curve 16, the speed obtained as well as for the curve 17, the angular displacement of the independent motor / gearbox 1.
  • the x-axis represents the angular rotation of the independent motor / gearbox 1 over one revolution, ie 360 ° which correspond to the progress of a sheet from one station to the next.
  • these curves show the correspondence between setpoint voltage and speed as well as the absence of excessive accelerations.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Discharge By Other Means (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Advancing Webs (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Belt Conveyors (AREA)
  • Forming Counted Batches (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Control Of Multiple Motors (AREA)

Abstract

An independent motor/reductor drives a conveyance device that feeds a converting press. The converting press includes a number of stations including a feeding station, a converting station, a waste stripping station and a delivery station. The conveyance device services the stations and includes two endless gripper bar chains to convey sheet material through the converting press. A transverse drive shaft drives the conveyance device under the control of the independent motor/reductor. The independent motor/reductor provides motion trajectories for the conveyance device that are independent of, but synchronized with, the serviced stations. The arrangement improves throughput, reduces machine wear and results in a simplified design.

Description

La présente invention concerne un dispositif de transport de feuilles, dans une presse de façonnage de feuilles de papier ou de carton comportant au moins une station d'introduction des feuilles, une station de façonnage, une station d'éjection des déchets et une station de réception des feuilles façonnées, ledit dispositif de transport comprenant deux trains de chaînes sans fin agencés pour transporter les feuilles de la station d'introduction à la station de réception, un arbre d'entraînement transversal portant des roues menantes des trains de chaînes sans fin et au moins un dispositif de saisie de feuilles attaché aux trains de chaînes sans fin.The present invention relates to a sheet conveying device, in a press for forming sheets of paper or cardboard comprising at least one sheet feeding station, a forming station, a waste ejection station and a station for receiving the shaped sheets, said transport device comprising two endless chain trains arranged to transport the sheets from the introduction station to the receiving station, a transverse drive shaft carrying drive wheels of the endless chain trains and at least one sheet gripper attached to the endless chain trains.

Le terme "transversal" désigne ici une direction horizontale et perpendiculaire à l'axe machine.The term "transverse" here designates a direction horizontal and perpendicular to the machine axis.

Dans les presses de façonnage connues, un seul moteur électrique entraîne usuellement l'ensemble de la machine. Ce moteur entraîne directement un volant d'inertie, un dispositif d'embrayage-frein étant intercalé entre ce volant et le reste de la machine. Ce système entraîne tous les éléments fonctionnant en synchronisme, notamment le sommier mobile de la platine de découpe, les stations d'éjection des déchets et de réception des poses, ainsi que les trains de chaînes portant les barres de pinces assurant la saisie et le transport des feuilles d'une station à la suivante.In known shaping presses, a single electric motor usually drives the entire machine. This motor directly drives a flywheel, a clutch-brake device being interposed between this wheel and the rest of the machine. This system drives all the elements operating in synchronism, in particular the movable bed base of the cutting board, the waste ejection and receiving stations, as well as the chain trains carrying the gripper bars for gripping and transporting. leaves from one station to the next.

Un cycle d'entraînement et de façonnage d'une feuille comprend une phase d'arrêt de la feuille pendant laquelle elle subit une opération de façonnage, telle que découpe ou éjection de déchets, et au moins une phase de mouvement pendant laquelle la feuille est amenée d'une station à la suivante. Cette phase de mouvement comprend nécessairement une phase d'accélération et une phase de décélération, et, en général, entre les deux, une phase où la feuille se déplace à vitesse à peu près constante.A training and forming cycle of a sheet comprises a stopping phase of the sheet during which it undergoes a shaping operation, such as cutting or ejecting waste, and at least one movement phase during which the sheet is brought from one station to the next. This movement phase necessarily comprises an acceleration phase and a deceleration phase, and, in general, between the two, a phase where the sheet moves at approximately constant speed.

Divers mécanismes réalisant ce type de cycle ont déjà été proposés, dans lesquels les roues menant les chaînes sont solidaires en rotation d'un organe d'accouplement qui, par déplacement axial alternativement se met en prise ou se dégage d'un organe d'entraînement, en même temps que des moyens d'immobilisation libèrent ou immobilisent les roues menant les chaînes, tandis que l'organe d'entraînement est alternativement entraîné dans l'un et l'autre sens de rotation.Various mechanisms producing this type of cycle have already been proposed, in which the wheels driving the chains are integral in rotation with a coupling member which, by axial displacement, alternately engages or disengages from a drive member. at the same time that immobilizing means release or immobilize the wheels driving the chains, while the drive member is alternately driven in one and the other direction of rotation.

De tels dispositifs mécaniques ont été décrits par exemple dans les brevets CH- 219.422 et CH- 411.555 . Dans les dispositifs de ce type, un secteur denté oscillant agissant sur l'arbre d'entraînement transversal du train de chaînes via un pignon est actionné par une bielle reliée à un excentrique monté sur l'extrémité d'un arbre entraîné par le dispositif d'entraînement général de la machine, qui effectue une rotation complète par course aller et retour du secteur denté oscillant.Such mechanical devices have been described for example in patents CH-219.422 and CH-411.555 . In devices of this type, an oscillating toothed sector acting on the transverse drive shaft of the train of chains via a pinion is actuated by a connecting rod connected to an eccentric mounted on the end of a shaft driven by the device. general drive of the machine, which performs a complete rotation by outward and return stroke of the oscillating toothed sector.

Par ce type d'entraînement mécanique, on est lié à une loi de mouvement unique, déterminé par la géométrie des pièces. Ce type d'entraînement est bien adapté aux cadences basses ou moyennes jusqu'à environ 5'000-6'000 feuilles/heure ; au-delà, les accélérations et décélérations au début et à la fin de la phase de mouvement deviennent très violentes. Or, après l'opération de découpe de la feuille en poses, ces dernières ne sont plus liées entre elles que par les points d'attache, qui peuvent se rompre en cas d'accélération brutale, provoquant un bourrage de la machine.By this type of mechanical drive, one is bound to a unique law of motion, determined by the geometry of the pieces. This type of training is well adapted to low or medium rates up to about 5,000-6,000 sheets / hour; beyond that, accelerations and decelerations at the beginning and at the end of the movement phase become very violent. However, after the cutting operation of the sheet in poses, the latter are no longer linked to each other only by the attachment points, which can break in case of sudden acceleration, causing a jamming of the machine.

Plusieurs dispositifs mécaniques ont été proposés pour remédier à ce défaut. Le brevet CH- 411.555 propose de placer l'entraînement du secteur denté sous le contrôle de deux cames communiquant un mouvement de balancement à un levier qui, par l'intermédiaire d'une bielle entraîne le secteur denté, alors que parmi les deux éléments du levier coopérant avec les deux cames, l'un, celui qui transmet au secteur denté le mouvement de retour à vide, est élastiquement pressé contre la came. Le système de cames permet de modifier la loi de mouvement en adoucissant le démarrage ; toutefois, pour un jeu de cames données, cette loi de mouvement ne peut plus être modifiée, sauf à changer de cames.Several mechanical devices have been proposed to remedy this defect. The patent CH-411.555 proposes to place the drive of the toothed sector under the control of two cams imparting a rocking motion to a lever which, via a connecting rod drives the toothed sector, while among the two elements of the lever cooperating with the two cams, one, which transmits to the toothed sector the movement back empty, is elastically pressed against the cam. The cam system makes it possible to modify the law of movement by softening the starting; however, for a given cam set, this motion law can no longer be modified except to change cams.

On connaît aussi des dispositifs dans lesquels on a tenté de supprimer le temps d'arrêt nécessaire à l'opération de découpe. Dans l'un de ces dispositifs, le constructeur a imaginé de donner un mouvement linéaire aux deux sommiers de la station de découpage de sorte que ceux-ci accompagnent le déplacement de la feuille en cours de découpage, solution qui permettait de supprimer le temps d'arrêt en modulant le mouvement linéaire de déplacement des trains de chaînes sans fin.Devices are also known in which attempts have been made to eliminate the downtime required for the cutting operation. In one of these devices, the constructor has imagined to give a linear movement to the two bed bases of the cutting station so that they accompany the displacement of the sheet being cut, a solution which made it possible to suppress the time of cutting. stopping by modulating the linear movement of endless chain trains.

Le document US- 5.348.285 décrit une machine de façonnage, notamment une presse à platine pour feuilles de papier ou objets analogues, fonctionnant par phases. La machine comprend une introduction des feuilles, une station de façonnage avec une platine de découpe, une déjection des déchets et une station de réception des feuilles façonnées. Les feuilles sont transportées de l'introduction à la station de réception par un convoyeur à chaîne sans fin équipé avec des dispositifs de saisie de feuilles. La station de réception comprend un transport vacuum à courroie sans fin, pour limiter des déformations des feuilles. Le mouvement d'introduction des feuilles est synchronisé avec le déplacement de la courroie sans fin de la station de réception.The document US-5,348,285 discloses a forming machine, in particular a platen press for sheets of paper or similar objects, operating in phases. The machine comprises an introduction of the sheets, a forming station with a cutting board, a waste disposal and a receiving station shaped sheets. The leaves are transported from the introduction to the receiving station by an endless chain conveyor equipped with sheet grippers. The receiving station includes an endless conveyor belt conveyor to limit leaf deformations. The insertion movement of the sheets is synchronized with the movement of the endless belt of the receiving station.

Le but de la présente invention est de proposer un dispositif de transport de feuilles autorisant des cadences élevées tout en permettant de réaliser à volonté un cycle d'entraînement optimal des feuilles sans accélérations trop violentes susceptibles de rompre les points d'attaches entre les poses composant une feuille. Un autre but de l'invention est de permettre la modification de l'allure d'un cycle d'entraînement des feuilles indépendamment du cycle d'entraînement de la station de façonnage. La modification de l'allure d'un cycle d'entraînement des feuilles consiste à agir sur les courbes d'accélération et de décélération et les durées respectives des phases d'un cycle en fonction du type de travail à exécuter, sans pour cela devoir procéder, entre deux travaux, à des échanges de pièces du dispositif de transport de feuilles.The object of the present invention is to provide a device for transporting sheets allowing high speeds while allowing to achieve at will an optimal training cycle leaves without too violent accelerations likely to break the points of attachment between the poses composing a leaf. Another object of the invention is to allow the modification of the pace of a leaf drive cycle independently of the training cycle of the forming station. The modification of the pace of a leaf drive cycle consists in acting on the acceleration and deceleration curves and the respective durations of the phases of a cycle depending on the type of work to be performed, without having to do so. proceed, between two works, exchanges of parts of the device of transport of leaves.

Ces buts sont atteints par un dispositif de transport de feuilles, dans une presse de façonnage de feuilles de papier ou de carton comportant au moins une station d'introduction des feuilles, une station de façonnage, une station d'éjection des déchets et une station de réception des feuilles façonnées, ledit dispositif de transport comprenant deux trains de chaînes sans fin agencés pour transporter les feuilles de la station d'introduction à la station de réception, un arbre d'entraînement transversal portant des roues menantes des trains de chaînes sans fin et au moins un dispositif de saisie de feuilles attaché aux trains de chaînes sans fin, dispositif de transport de feuilles dans lequel ledit arbre d'entraînement transversal est entraîné séparément de l'entraînement des autres stations de la presse, par au moins un moteur indépendant, ledit moteur indépendant étant un moteur capable de fonctionner par cycles d'entraînement comprenant au moins une phase de mouvement et une phase de décélération et/ou d'arrêt commandées par un dispositif de commande, la durée de chaque cycle d'entraînement du moteur indépendant étant égale à la durée d'un cycle de façonnage de ladite station de façonnage.These objects are achieved by a sheet conveying device in a paper or cardboard forming press having at least one sheet feeding station, a converting station, a waste ejection station and a station for receiving the shaped sheets, said transport device comprising two endless chain trains arranged to transport the sheets from the introduction station to the receiving station, a transverse drive shaft carrying drive wheels of the endless chain trains and at least one sheet gripper attached to the endless chain trains, a sheet conveying device in which said transverse drive shaft is driven separately from the drive of the other press stations by at least one independent motor , said independent motor being a motor capable of operating by training cycles comprising at least one phase of movement and a deceleration and / or stop phase controlled by a control device, the duration of each drive cycle of the independent motor being equal to the duration of a shaping cycle of said forming station.

Le fait d'entraîner le dispositif de transport de feuilles par un moteur autonome au lieu de l'entraîner par le même moteur que les autres stations de la presse de façonnage se heurtait à un préjugé, à savoir la crainte d'un défaut de synchronisation entre l'avance séquentielle des feuilles et le fonctionnement de la platine de découpe des stations en aval. Les inventeurs ont constaté au contraire qu'une commande, notamment une commande électronique, qui reçoit un signal représentatif de la position de la platine de la station de découpe et un signal représentatif de la position du train de chaînes permet de commander le moteur indépendant pilotant l'avancement du train de chaînes en synchronisme parfait avec le cycle de la platine. A l'intérieur d'un cycle d'entraînement, un dispositif de commande pilotant le moteur indépendant par délivrance d'un courant électrique approprié est capable d'ajuster avec beaucoup plus de souplesse que ne pourrait le faire un dispositif mécanique, les caractéristiques de la phase d'accélération, de la phase de décélération et de la phase d'arrêt du dispositif de transport. L'entraînement par l'intermédiaire du moteur indépendant permet en particulier de mieux ajuster les durées relatives des phases de mouvement et d'arrêt du train de chaînes avec les phases d'arrêt et de mouvement de la platine de découpe et, par conséquent, de diminuer la durée de la phase d'arrêt de la platine, ce qui permet d'augmenter la cadence d'ensemble de la machine.The fact of driving the sheet-carrying device by an autonomous motor instead of driving it by the same motor as the other stations of the forming press was prejudiced, namely the fear of a synchronization defect. between the sequential advance of the sheets and the operation of the cutting board of downstream stations. The inventors have found, on the contrary, that a control, in particular an electronic control, which receives a signal representative of the position of the plate of the cutting station and a signal representative of the position of the train of chains makes it possible to control the independent motor driving the progress of the chain train in perfect synchronism with the cycle of the stage. Within a driving cycle, a control device driving the independent motor by delivering a suitable electric current is able to adjust with much more flexibility than a mechanical device, the characteristics of the acceleration phase, the deceleration phase and the stopping phase of the transport device. The drive via the independent motor makes it possible in particular to better adjust the relative durations of the phases of movement and stopping of the train of chains with the stopping and moving phases of the cutting plate and, consequently, to reduce the duration of the stop phase of the platen, which increases the overall rate of the machine.

D'autres particularités et avantages de l'invention apparaîtront à l'homme du métier à la lecture de la description d'un mode d'exécution, en se référant au dessin, dans lequel;

  • les figures 1a et 1b montrent l'implantation d'un moteur d'entraînement d'un dispositif de transport dans une presse de façonnage, respectivement en vue latérale et en vue de dessus;
  • la figure 2 est une vue schématique du dispositif de commande de ce moteur;
  • la figure 3 représente l'enregistrement des caractéristiques d'un cycle.
Other features and advantages of the invention will become apparent to those skilled in the art upon reading the description of an embodiment, with reference to the drawing, in which;
  • the Figures 1a and 1b show the implementation of a drive motor of a transport device in a forming press, respectively in side view and in top view;
  • the figure 2 is a schematic view of the control device of this engine;
  • the figure 3 represents the recording of the characteristics of a cycle.

Les figures 1a et 1b montrent un ensemble moteur/réducteur indépendant 1 implanté en prise directe avec un prolongement de l'arbre d'entraînement transversal 2 qui porte les roues menantes 3, 3' des trains de chaînes sans fin 5, 6 d'une presse de façonnage. Comme le montre notamment la figure 1a, le moteur est implanté au niveau du compartiment 4 qui, dans une presse de façonnage de l'art antérieur, contenait les pièces du dispositif d'entraînement mécanique des trains de chaînes 5, 6 et les pièces d'accouplement avec le moteur entraînant les diverses stations de la presse, pièces qui sont ici supprimées. Ce moteur/réducteur indépendant 1 peut donc être implanté sans modification de l'ensemble d'une machine existante. L'homme du métier comprendra aisément que le moteur peut également être implanté dans une position dite "en miroir", c'est-à-dire sur l'extrémité opposée de l'arbre d'entraînement transversal du train de chaînes, donc aussi bien en position dite "côté conducteur" CC qu'en position "côté opposé au conducteur" COC. Le moteur/réducteur indépendant 1 peut aussi être monté dans une position entre les bâtis 7, 8 et entraîner l'arbre transversal 2 par des moyens connus tels que pignons, courroies, chaînes, ce qui permet de supprimer le ou les compartiments latéraux 4 d'entraînement et de gagner en encombrement.The Figures 1a and 1b show an independent motor / gear unit 1 implanted in direct contact with an extension of the transverse drive shaft 2 which carries the driving wheels 3, 3 'endless chain trains 5, 6 of a forming press. As shown in particular figure 1a , the motor is located at the compartment 4 which, in a prior art forming press, contained the parts of the mechanical drive device of the chain trains 5, 6 and the coupling parts with the motor driving the various stations of the press, parts which are here suppressed. This independent motor / gearbox 1 can be implanted without modification of the whole of an existing machine. Those skilled in the art will readily understand that the motor can also be implanted in a so-called "mirrored" position, that is to say on the opposite end of the transverse drive shaft of the chain train, so also in the so-called "driver's side" position CC in position "opposite side to driver" COC. The independent motor / gearbox 1 can also be mounted in a position between the frames 7, 8 and drive the transverse shaft 2 by known means such as pinions, belts, chains, which makes it possible to remove the lateral compartment or compartments 4. drive and gain space.

Le moteur/réducteur indépendant entraînant les trains de chaînes sans fin 5, 6 est de préférence un moteur électrique de régulation à haute dynamique. Ce moteur/réducteur indépendant 1 peut être choisi parmi les moteurs synchrones, asynchrones, à courant continu, avec frein ou sans frein, commercialement disponibles. A titre d'exemple, lors d'essais effectués par le déposant, un entraînement brushless synchrone comportant un moteur de type HXA60VH commercialisé par la société ABB Normelec S.A. (Suisse) a permis d'entraîner les trains de chaînes sans fin 5, 6 d'une presse de façonnage à des cadences importantes, en supprimant les entraînements mécaniques d'origine de cette machine. Plusieurs fabricants offrent des moteurs électriques en exécutions standard pouvant développer des couples de 200-500 Nm, permettant d'atteindre des accélérations des trains de chaînes de 25 à 70m/s2. Le coût de tels moteurs standards est inférieur au coût de l'ensemble des pièces mécaniques des dispositifs connus.The independent motor / gearbox driving the endless chain trains 5, 6 is preferably a high dynamic control electric motor. This independent motor / gearbox 1 can be chosen from synchronous, asynchronous, DC, brake or non-brake motors, commercially available. By way of example, during tests carried out by the applicant, a synchronous brushless drive comprising a motor of the HXA60VH type marketed by ABB Normelec SA (Switzerland) enabled the endless chain trains 5, 6 d to be driven. a forming press at high speeds, by eliminating the original mechanical drives of this machine. Several manufacturers offer electric motors in standard versions that can develop torques of 200-500 Nm, making it possible to reach chain train acceleration from 25 to 70m / s 2 . The cost of such standard motors is lower than the cost of all mechanical parts of known devices.

La figure 2 montre le schéma de principe du dispositif de commande électronique du moteur/réducteur indépendant 1. Le dispositif de commande, CDE, reçoit d'un codeur absolu et incrémentiel 9 un signal donnant la position exacte de la platine de découpe 10, ce signal servant de maître réel à l'ensemble du système. La commande CDE reçoit également d'un codeur absolu et incrémentiel 11 la position absolue des trains de chaînes 5, 6; la commande CDE reçoit enfin la position angulaire du moteur/réducteur indépendant 1 détectée par le codeur absolu et incrémentiel 12. La comparaison de ces signaux permet à la commande électronique CDE de déterminer exactement les temps de blocage et de déblocage du moteur/réducteur indépendant 1, c'est-à-dire de déterminer le début et la fin de la phase d'arrêt et de donner les consignes d'alimentation courant/tension déterminant, à tout instant, les accélérations et les vitesses du moteur/réducteur indépendant 1.The figure 2 shows the circuit diagram of the electronic control device of the independent motor / gearbox 1. The control device, CDE, receives from an absolute and incremental encoder 9 a signal giving the exact position of the cutting board 10, this signal serving as real master to the entire system. The command CDE also receives from an absolute and incremental encoder the absolute position of the string trains 5, 6; the command CDE finally receives the angular position of the independent motor / gearbox 1 detected by the absolute and incremental encoder 12. The comparison of these signals enables the electronic control CDE to determine exactly the locking and unlocking times of the independent motor / gearbox 1 , that is to say to determine the beginning and the end of the stopping phase and to give the current / voltage supply instructions determining, at all times, the accelerations and the speeds of the independent motor / gearbox 1.

La figure 3 montre sur un même graphique cinq courbes 13 à 17, montrant en unités arbitraires, pour la courbe 13, la tension, pour la courbe 14, l'intensité du courant alimentant le moteur/réducteur indépendant 1, pour la courbe 15, l'accélération, pour la courbe 16, la vitesse obtenue ainsi que pour la courbe 17, le déplacement angulaire du moteur/réducteur indépendant 1. Dans cette figure, l'axe des abscisses représente la rotation angulaire du moteur/réducteur indépendant 1 sur un tour, soit 360° qui correspondent à l'avancement d'une feuille d'une station à la suivante immédiate.The figure 3 shows on the same graph five curves 13 to 17, showing in arbitrary units, for the curve 13, the voltage, for the curve 14, the intensity of the current supplying the motor / independent reducer 1, for the curve 15, the acceleration for the curve 16, the speed obtained as well as for the curve 17, the angular displacement of the independent motor / gearbox 1. In this figure, the x-axis represents the angular rotation of the independent motor / gearbox 1 over one revolution, ie 360 ° which correspond to the progress of a sheet from one station to the next.

On constate notamment sur ces courbes la correspondance entre tension de consigne et vitesse ainsi que l'absence d'accélérations excessives. Par modification de la courbe de tension préprogrammée, on peut aisément supprimer la phase de mouvement à vitesse constante, prolonger ou raccourcir la durée de la phase de mouvement à l'intérieur d'un cycle.In particular, these curves show the correspondence between setpoint voltage and speed as well as the absence of excessive accelerations. By changing the preprogrammed voltage curve, the motion phase at a constant speed can be easily suppressed, or the duration of the movement phase within a cycle can be prolonged or shortened.

Claims (5)

  1. Conveying device for sheets in a press for converting paper or cardboard sheets comprising at least a sheets infeed station, a converting station comprising a diecutting platen (10), a waste stripping station and a delivery station of the converted sheets, said conveying device comprising two endless gripper bar chains (5, 6) arranged for conveying the sheets from the infeed station to the delivery station, a transverse drive shaft (2) carrying wheels (3, 3') for driving the endless gripper bar chains (5, 6) and at least one sheet gripping device attached to the endless gripper bar chains (5, 6), characterized in that said transverse drive shaft (2) is driven independently from the drive for the other stations of the press, by at least one independent motor/reductor (1), electric of high dynamic regulation operable by drive cycles including at least a motion phase and a deceleration phase and/or stop phase, said phases being controlled as a function of the exact position of the diecutting platen (10), by a control device (CDE), able to adjust, for each drive cycle, at least the durations and amplitudes of an acceleration phase, a deceleration phase and a stop phase, the duration of each drive cycle of the independent motor/reductor (1) being equal to the duration of a converting cycle of said converting station, and in that it comprises an absolute and incremental encoder (9) giving the exact position of the diecutting platen (10), an encoder (11) of the position of the endless gripper bar chains (5, 6) and an encoder (12) of the angular position of the independent motor (1) connected to said electronic control device (CDE).
  2. Conveying device according to claim 1, characterized in that said independent motor/reductor (1) is selected among the synchronous, asynchronous, DC motors, with brake or brakeless.
  3. Conveying device according to claim 2, characterized in that said independent motor/reductor (1) is mounted in the extension of said transverse drive shaft (2), operator's side (CC).
  4. Conveying device according to claim 2, characterized in that said independent motor/reductor (1) is mounted in the extension of said transverse drive shaft (2), opposite operator's side (COC).
  5. Conveying device according to claim 2, characterized in that said independent motor/reductor (1) is mounted between frames (7, 8).
EP02001294A 2001-02-01 2002-01-18 Sheet transport device Expired - Lifetime EP1228994B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH00179/01A CH694638A5 (en) 2001-02-01 2001-02-01 A sheet conveying device.
CH1792001 2001-02-01

Publications (3)

Publication Number Publication Date
EP1228994A2 EP1228994A2 (en) 2002-08-07
EP1228994A3 EP1228994A3 (en) 2004-03-31
EP1228994B1 true EP1228994B1 (en) 2010-07-14

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EP02001294A Expired - Lifetime EP1228994B1 (en) 2001-02-01 2002-01-18 Sheet transport device

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US (2) US6691997B2 (en)
EP (1) EP1228994B1 (en)
JP (1) JP3735072B2 (en)
KR (1) KR100435248B1 (en)
CN (1) CN1172835C (en)
AT (1) ATE473939T1 (en)
AU (1) AU1471402A (en)
BR (1) BR0200270B1 (en)
CA (1) CA2369940C (en)
CH (1) CH694638A5 (en)
DE (1) DE60236977D1 (en)
ES (1) ES2348292T3 (en)
TW (1) TW536519B (en)

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Also Published As

Publication number Publication date
CA2369940A1 (en) 2002-08-01
US6691997B2 (en) 2004-02-17
ATE473939T1 (en) 2010-07-15
US6845979B2 (en) 2005-01-25
EP1228994A3 (en) 2004-03-31
US20020101028A1 (en) 2002-08-01
DE60236977D1 (en) 2010-08-26
EP1228994A2 (en) 2002-08-07
TW536519B (en) 2003-06-11
AU1471402A (en) 2002-08-08
BR0200270B1 (en) 2010-06-01
CA2369940C (en) 2007-12-04
KR100435248B1 (en) 2004-06-11
CN1172835C (en) 2004-10-27
CN1369369A (en) 2002-09-18
CH694638A5 (en) 2005-05-13
KR20020064171A (en) 2002-08-07
US20040036209A1 (en) 2004-02-26
JP2002284419A (en) 2002-10-03
BR0200270A (en) 2002-10-08
JP3735072B2 (en) 2006-01-11
ES2348292T3 (en) 2010-12-02

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