EP1044908A1 - Method for positionning plate-shaped products in a feeding station of a treatment machine and device for carrying out the method - Google Patents
Method for positionning plate-shaped products in a feeding station of a treatment machine and device for carrying out the method Download PDFInfo
- Publication number
- EP1044908A1 EP1044908A1 EP00105172A EP00105172A EP1044908A1 EP 1044908 A1 EP1044908 A1 EP 1044908A1 EP 00105172 A EP00105172 A EP 00105172A EP 00105172 A EP00105172 A EP 00105172A EP 1044908 A1 EP1044908 A1 EP 1044908A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tablet
- shelf
- bar
- actuators
- plate element
- 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
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Classifications
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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
- B65H5/00—Feeding articles separated from piles; Feeding articles to machines
- B65H5/08—Feeding articles separated from piles; Feeding articles to machines by grippers, e.g. suction grippers
- B65H5/10—Reciprocating or oscillating grippers, e.g. suction or gripper tables
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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
- B65H5/00—Feeding articles separated from piles; Feeding articles to machines
- B65H5/08—Feeding articles separated from piles; Feeding articles to machines by grippers, e.g. suction grippers
- B65H5/085—Feeding articles separated from piles; Feeding articles to machines by grippers, e.g. suction grippers by combinations of endless conveyors and grippers
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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
- B65H9/00—Registering, e.g. orientating, articles; Devices therefor
- B65H9/10—Pusher and like movable registers; Pusher or gripper devices which move articles into registered position
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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
- B65H2301/00—Handling processes for sheets or webs
- B65H2301/40—Type of handling process
- B65H2301/44—Moving, forwarding, guiding material
- B65H2301/443—Moving, forwarding, guiding material by acting on surface of handled material
- B65H2301/4433—Moving, forwarding, guiding material by acting on surface of handled material by means holding the material
- B65H2301/44331—Moving, forwarding, guiding material by acting on surface of handled material by means holding the material at particular portion of handled material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
- B65H2511/20—Location in space
- B65H2511/23—Coordinates, e.g. three dimensional coordinates
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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
- B65H2553/00—Sensing or detecting means
- B65H2553/40—Sensing or detecting means using optical, e.g. photographic, elements
- B65H2553/41—Photoelectric detectors
Definitions
- the present invention relates to a method and a device for positioning of plate elements in the insertion station of a machine for processing sheet material, and more particularly at a device for positioning a sheet, paper, cardboard or material similar, very precisely in the machine introduction station, shortly before the front edge of that sheet is gripped by a transport comprising a series of clamps mounted on a crossbar integral with side chains thereafter taking that sheet in the various subsequent machine processing stations such as platinum printing, cutting or other.
- the sheet is teased on the margin table against front and side stops by means of advancement devices such as rollers or strips of material lower elastic resting on the table, or a pair of rollers arranged above and below the table.
- advancement devices such as rollers or strips of material lower elastic resting on the table, or a pair of rollers arranged above and below the table.
- the front and side stops used are arranged exactly with reference to the stations following.
- the sheet is then quickly pushed against the tabs by the advancement organs then gripped by the gripper bar.
- the stops are then retracted and the gripper bar can pull the sheet into the station next processing and position it precisely in relation to the tools of the that station's deck.
- Patent CH 676695 discloses a positioning device in which the cleats are motorized so as to be able to control a variation of their position and in which a printing mark or other distinctive sign of prior processing can be identified by means of optoelectronic reading in order to adjust the position of the cleats, sheet, directly depending on the brand or sign.
- pressing a sheet against a cleat can cause the formation of an unsightly mark on the corresponding edge.
- the bead of this brand can also hinder the introduction of the sheet in borderline circumstances.
- the object of the present invention is to provide a method and a device for positioning plate elements, such as sheets of paper, cardboard or the like, at the feed station processing machine, which is faster to allow an increase cadence, while remaining very precise, especially in the case of sheets having received prior treatment.
- the device should not leave no mark on the plate element.
- the design of this device must however, remain relatively simple to increase reliability, to simplify maintenance and reduce costs as much as possible production.
- the subsequent phase of advance can be used to make adjustments to the movement of the tablet compared to its base stroke to very dynamically correct the any longitudinal, lateral or skew errors of the element in plate.
- the plate element is raw, the corrections are made on the base of the identification of its edges, if the sheet has been previously treated, the corrections are advantageously made on the basis of a mark of identification of the distinctive sign (s) corresponding to said treatment.
- the corrections made on the fly allow you not to have to stop unnecessarily the plate element, therefore significantly increasing the rate possible from the machine.
- the positioning device control method consists of therefore, from the rear starting position of the tablet, order the actuators to advance the tablet forward until the front edge of the plate element has been detected by optoelectronic means, then at control the corresponding actuator to move the shelf until the side edge of the plate element has been detected by optoelectronic means.
- the control method consists, from the shelf in rear starting position, order actuators for advance the tablet forward at a constant speed until the bar clamps of the machine arrives in the waiting position for receiving an item in plate, then order the actuators to make adjustments to the displacement of the tablet relative to its basic stroke in order to correct the any longitudinal, lateral or skew errors of the element in plate determined as a function of the readings of the optoelectronic means, and to finally stop the front edge of the plate element in position in the clamps of the drive bar.
- the temporary pneumatic fastening means of the element in plate on the shelf may include a mesh of orifices provided on the upper face of the tablet in communication with an internal chamber connected by an electromagnetic opening / closing valve to a source of depression.
- pneumatic means prove to be relatively slow and delicate to implement.
- the fixing means temporary include a comb mounted to move pivotally above, near and parallel to the notched front edge of the tablet, the fingers of the comb being oriented forward so that each of them form with each protuberance of a shelf separating a notch a gripper for gripping the front edge of the plate element, as well as means for control of the angular position of the comb.
- the means for controlling the angular position of the comb comprise on the one hand one or more springs arranged between the shelf and the rear bar connecting the fingers of the comb so that, at rest, this spring goes up the rear bar and keeps this comb closed, that is to say with the fingers resting on their protuberance of the tablet, and on the other hand, integral with the station, one or more control members overlying vertical displacement, such as the end of a lever actuated in rotation or the output rod of a pneumatic or electromagnetic cylinder, and each connected by a telescopic pendulum rod to the rear bar of the comb so that you can press and lower the rear bar in the low position of the comb and thus keep the comb open during a displacement of the Tablet.
- one or more control members overlying vertical displacement such as the end of a lever actuated in rotation or the output rod of a pneumatic or electromagnetic cylinder
- the spring guarantees effective closing of the comb, thus a firm hold of the element in plate during its supply and its position corrections.
- the connecting rod When the connecting rod on the other hand is in the low position with its rod in abutment during removing the shelf back to its rear starting position, it opens the comb and keep it open despite the displacement of the tablet thanks to the pendulum arrangement of this connecting rod.
- the plate element is held along its edge before regularly and with almost constant pressure to avoid formation of any harmful mark.
- holding this front edge well flat on the shelf protrusions allows this element edge to be inserted in plate without any risk of snagging in the open clamps of the bar machine drive.
- the longitudinal translation is performed by a precision actuator which ensures the displacement and longitudinal position correction.
- the tablet is mounted each side on a lateral vertical pivot respectively secured to a carriage moved along a longitudinal slide by a supported linear actuator by the base rail.
- the tablet simply performs a purely complementary translational movement longitudinal forward.
- the introduction of a slight gap between the displacements of each of the side actuators allows to put voluntarily the cross shelf in a rotation about a vertical axis to make up for an initial cross of the plate element.
- the tablet is mounted in the middle on a central vertical pivot and on each side on a lateral vertical pivot, the central pivot being integral with a sliding carriage in a longitudinal slide capable of being moved transversely by a first linear actuator, each lateral pivot being integral with a carriage sliding in a cross slide capable of being moved longitudinally respectively by a second and third linear actuator, the first, second and third actuators being supported on the crossmember of based.
- the tablet simply performs a purely longitudinal translation forward, the carriage central pivot only following the movement within its slide longitudinal. Furthermore, the introduction of a slight gap between the displacements of the second and third actuators allows to induce willfully a crosstalk in the tablet to make up for an initial error corresponding to the plate element.
- the implementation of the first actuator induces a transverse movement to the tablet, the carriages lateral pivots only following this movement within their transverse slide.
- the first actuator is slaved in position relative to a setpoint which is established according to the transverse position error of the plate element as read by optoelectronic means.
- the second and third actuators are slaved in position according to a setpoint of correction of longitudinal and / or skew errors as also read by optoelectronic means.
- the tablet actuator it is slaved in position according to a fleeting instruction with reference to the cycle of the machine, usually identified by the angle of the motor output shaft main, this fleeting instruction being representative of the basic displacement from front to back for supplying the plate element.
- the linear actuators are linear electric motors, the rotor of which is in the form of a bar movable in translation furnished with a series of permanent magnets passing in front of one or more loops of a stator supplied with electric current, this bar directly supporting either the pivot support or the slide transverse within which slides the pivot carriage.
- the means optoelectronic element edge detection may not include than a pair of front photocells and a cell lateral photoelectric.
- optoelectronic means side element detection plate can be a row of photocells or CCD strip, which avoids printing at the tablet a transverse movement specially to locate the edge lateral.
- the optoelectronic means for detecting the marks or other distinctive signs of prior processing may be a CCD matrix or other camera capturing an image of the plate element during the passage of the tablet.
- CCD matrix or other camera capturing an image of the plate element during the passage of the tablet.
- a bar of pliers 10 having at its rear edge a plurality of bars 12 provided for grasp the front edge of a sheet 5.
- This bar 10 is hung in each of its two lateral ends to a drive chain towards subsequent treatment stations then back in a loop towards the initial position for waiting to receive a new sheet.
- a sheet 5 is brought in and exactly positioned in the clamps 12 by means of a shelf horizontal 14 performing on the one hand an alternative longitudinal displacement back and forth to find and bring this sheet and secondly making correction movements taking into account the position effective of that sheet on this tablet.
- the shelf 14 is first mounted on a cross member of horizontal base 8 which can pivot along its horizontal axis, thus ensuring transfer of the plate element from said shelf 14 to the clamp 12 carried by the clamp bar 10.
- the tablet, mounted on the cross member 8 is movable in longitudinal translation, in transverse translation and askew that is to say instantaneous rotation about a vertical axis.
- this shelf 14 is articulated on three vertical pivots respectively a central 48 and two lateral: a 68 on the left says “side conductor "CC and a 58 on the right says” opposite side to the conductor "COC.
- central articulation pivot 48 is integral with a sliding carriage inside a longitudinal slide 46, while the carriages of the lateral pivots 58 and 68 are both sliding inside cross slides 56 COC and 66 CC.
- the longitudinal central slide 46 is supported by a movable bar 44 comprising permanent magnets and forming the stator mobile of a central linear electric motor 40 whose stator 42 rests by a base 41 in the center of the base cross member 8.
- the slide transverse COC 56 and the transverse slide CC 66 are integral respectively a COC 54 bar and a CC 64 bar with magnets permanent forming a linear electric motor rotor COC 50 and CC 60 whose stators respectively 52 and 62 rest by their base 51 and 61 in each end of the base cross member 8.
- the movable bars 44, 54, 64 may have a row permanent magnets on one side of the bar, the stator not comprising while only one winding opposite; or, preferably, a row permanent magnets on both sides, the stator then having two windings respectively opposite each of the rows.
- Such permanent magnet actuators with good dynamic performance are commercially available, in particular are marketed by the company Swiss ETEL under the reference LMA11 / 50.
- linear motors 40, 50, 60 are mainly intended for print on the tablet 14 displacements and corrections on the order of ten at twenty millimeters over a total stroke of about one hundred millimeters.
- the two linear actuators COC 50, CC 60 advance in synchronism, the tablet 14 moves purely in longitudinal translation towards the gripper bar 10.
- one of the linear motors 50, 60 has voluntarily a displacement of amplitude different from that of the other, this causes cross bar 14 by pivoting around pivot 48 can simultaneously move forward or backward.
- the implementation of the central linear electric motor 40 induces a movement transverse to the shelf 14, the pivots 58 and 68 following this movement inside their respective slide 56, 66.
- the sheet 5 is temporarily fixed to the shelf 14 by a series of front clamps composed on the one hand of protrusions 16 of edge front of cooperating tablet with fingers 22 of a comb 20.
- the tablet edge protrusions 16 delimit notches 17 located in correspondence with the clamps 12 of the bar 10, these notches being significantly wider than the clamps 12 to allow any transverse displacements of the tablet 14 printed by the linear motor central 40.
- the fingers 22 are connected by a rear bar 21 to form together a comb 20 mounted at each of its lateral ends in pivoting by arms 24 and 25 allowing the opening and then the closing of the shelf clips.
- two springs side COC (side opposite the driver) 26 and CC (driver side) 27 are arranged between the shelf 14 and the rear bar 21 of comb 20 so that to maintain, normally at rest, the comb 20 therefore the pliers 16, 22, in the state closed.
- This clamp is particularly closed when it carries with it a sheet 5 to bring it and position it in the clamps 12 of the bar 10.
- a voluntary opening mechanism of the comb 20 comprises, in each lateral end, a pendulum telescopic connecting rod COC 34 and CC 35 articulated at the rear comb bar 21 by a lower ball joint 33, and at the end of a lever 31 by an upper ball joint 32, the lever 31 being capable of being raised or lowered by a rotating disc 30.
- the arm of the connecting rod telescopic slides freely and has no effect on the bar 21 which is then pushed upwards by the springs 26, 27.
- the discs 30 have rotated clockwise to lower their respective levers 31, the telescopic connecting rod rod abutting so as to press the rear bar 21 and thus tilt upwards the gripper fingers 22.
- a possible pivoting movement of the connecting rods around of their upper end 32 makes it possible to voluntarily maintain the combs 20 open throughout the return journey.
- the rear edge 18 of the shelf 14 is oblique downwards to facilitate the introduction of a new sheet on its upper face, therefore in the clamps 26/22.
- the comb opening mechanism 20 could advantageously be constructed by replacing the pendulum telescopic rod COC 34, respectively CC 35, comprising a second rotation disc connected to a cam while being independent of disc 30 so as to generate a stroke allowing the use of a non-telescopic zipper.
- each rotor bar has a graduated slide for reading by a cell respectively 43, 53, 63 for generating a feedback signal for controlling linear electric motors by position control according to a leaking position setpoint curve, this control being carried out so known within a microprocessor 100.
- the positioning device includes a pair of side-by-side cells 72, 64 for detecting the front edge a sheet 5 and a lateral cell strip 76 making it possible to detect the lateral edge of this same leaf.
- the results of reading these cells are also applied to microprocessor 100.
- the device can further include a reading cell 70 for detecting the presence of a sheet to enter or detection of the passage of the tablet only after a predetermined time to avoid any possible collision with the bar pliers 10.
- the operating mode of the positioning device according to Figures 1 and 2 will be better understood when studying the diagram in Figure 3 illustrating the stroke of the tablet 14 during a machine cycle.
- the reference of a cycle is usually the angular position of the motor output shaft main, the abscissa of the diagram corresponding to a full 360 ° turn. This cycle begins and ends at the same 220 ° "machine" reference corresponding to the moment when the tablet is momentarily furthest back motionless ready to go.
- the tablet 14 starts forward and picks up speed to reach that of advancement of the sheet that she grabs at stolen at time S, the disks 30 of the levers 31 rapidly rotating in direction counterclockwise to release the comb and close the pliers 16/22.
- the edge front of sheet 5 is detected by pair of cells 72, 4 and side edge is detected by the cell strip 76, allowing the microprocessor 100, knowing the base stroke of the tablet 14, to determine the error of positioning of the sheet 5 relative to its theoretical position.
- the microprocessor can then establish the presence, or absence and magnitude possible positioning errors, both longitudinal and transverse or even askance of the sheet and establish correction instructions.
- the subsequent phase Av lasting approximately 30 °, corresponds to a brought from the sheet by the tablet 14 at a constant speed calculated such so as to first pass and arrive the gripper bar 10 in position waiting.
- the microprocessor 100 can then apply the linear instructions to linear electric motors 40, 50, 60 correction so as to move the tablet accordingly.
- This phase Z of correction has a duration of the order of 90 ° and the amplitude of the stroke of the tablet is then dependent on the extent of the corrections as shown by the minimum and maximum stroke.
- the next phase Ar lasting approximately 20 °, corresponds to the stop from the front edge of the sheet 5 in the middle of the clips 12 which close, only then allowing the opening of the comb 20 by lowering the levers 31.
- Phase R corresponds to the return of the tablet to the initial position at constant speed, this displacement being on the one hand imprinted by the basic cross member 8 and on the other hand by linear electric motors returning respectively in neutral position. A new leaf feeding cycle can then start again.
- the system positioning of a plate element according to the invention is remarkable to the extent that he manages to grab a sheet on the fly and, while bringing it towards the clamps of the drive bar, to read its position to calculate possible errors, and, while continuing to advance, to compensate for these possible errors to finally position this sheet just in time to remarkably precise within the bar clamps.
- the correction of positioning here did not need to stop the progression of the sheet this which significantly increases the speed of the machine to reach values up to 12,000 sheets / hour.
- the use of electric motors linear significantly simplifies the design of the device therefore its costs of realization and maintenance.
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- Mechanical Engineering (AREA)
- Engineering & Computer Science (AREA)
- Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
- Registering Or Overturning Sheets (AREA)
- Warehouses Or Storage Devices (AREA)
- Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
- Manufacture Of Motors, Generators (AREA)
- Manufacturing Of Printed Wiring (AREA)
- Container, Conveyance, Adherence, Positioning, Of Wafer (AREA)
- Turning (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
- Apparatuses And Processes For Manufacturing Resistors (AREA)
- Feeding Of Workpieces (AREA)
- Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
- Inking, Control Or Cleaning Of Printing Machines (AREA)
Abstract
Description
La présente invention est relative à un procédé et à un dispositif de positionnement d'éléments en plaque dans la station d'introduction d'une machine de traitement d'une matière en feuille, et plus particulièrement à un dispositif de positionnement d'une feuille, de papier, de carton ou de matière similaire, de manière très précise dans la station d'introduction de la machine, peu avant que le bord avant de celle feuille ne soit saisi par un dispositif de transport comprenant une série de pinces montées sur une barre transversale solidaire de chaínes latérales emmenant par la suite celle feuille dans les différentes stations de traitement ultérieures de la machine telles que platine d'impression, de découpe ou autres.The present invention relates to a method and a device for positioning of plate elements in the insertion station of a machine for processing sheet material, and more particularly at a device for positioning a sheet, paper, cardboard or material similar, very precisely in the machine introduction station, shortly before the front edge of that sheet is gripped by a transport comprising a series of clamps mounted on a crossbar integral with side chains thereafter taking that sheet in the various subsequent machine processing stations such as platinum printing, cutting or other.
Dans les dispositifs de positionnement couramment utilisés, la feuille est taquée sur la table de marge contre des butées frontales et latérales au moyen d'organes d'avancée tels que des galets ou bandes en matériau élastique supérieur descendant en appui sur la table, ou une paire de galets agencés au-dessus et en dessous de la table.In commonly used positioning devices, the sheet is teased on the margin table against front and side stops by means of advancement devices such as rollers or strips of material lower elastic resting on the table, or a pair of rollers arranged above and below the table.
Dans le cas de feuilles brutes, les butées frontales et latérales utilisées sont disposées exactement par rapport aux références des stations suivantes. La feuille est alors rapidement poussée contre les taquets par les organes d'avancée puis saisie par la barre de pinces. Les butées sont alors escamotées et la barre de pinces peut tirer la feuille dans la station de traitement suivante et la positionner avec précision par rapport aux outils de la platine de celle station.In the case of raw sheets, the front and side stops used are arranged exactly with reference to the stations following. The sheet is then quickly pushed against the tabs by the advancement organs then gripped by the gripper bar. The stops are then retracted and the gripper bar can pull the sheet into the station next processing and position it precisely in relation to the tools of the that station's deck.
Le positionnement est un peu plus délicat lorsque la feuille a subi au préalable un ou plusieurs traitements, par exemple d'impression ou de refoulage de lignes de pliage, et que les traitements suivants doivent être effectués très exactement en référence aux résultats des traitements précédents. Le brevet CH 676695 divulgue un dispositif de positionnement dans lequel les taquets sont motorisés de telle sorte à pouvoir commander une variation de leur position et dans lequel une marque d'impression ou autre signe distinctif du traitement préalable peut être repéré par des moyens de lecture optoélectroniques afin d'ajuster la position des taquets, donc de la feuille, directement en fonction de la marque ou du signe. The positioning is a little more delicate when the sheet has undergone one or more treatments, for example printing or bending of fold lines, and that the following treatments must be performed very precisely with reference to the results of the treatments previous. Patent CH 676695 discloses a positioning device in which the cleats are motorized so as to be able to control a variation of their position and in which a printing mark or other distinctive sign of prior processing can be identified by means of optoelectronic reading in order to adjust the position of the cleats, sheet, directly depending on the brand or sign.
Toutefois, ces dispositifs de positionnement à taquets impliquent que l'avance de chaque feuille soit pratiquement arrêtée pendant toute la durée de son opération de taquage et d'ajustement, ce qui limite sensiblement la cadence possible de défilement des feuilles dans la machine.However, these cleat positioning devices involve that the advance of each sheet is practically stopped for the entire duration of its jogging and adjustment operation, which appreciably limits the possible rate of sheet movement in the machine.
En outre, le fait d'appuyer une feuille contre un taquet peut entraíner la formation d'une marque disgracieuse sur le bord correspondant. Le bourrelet de cette marque peut par ailleurs gêner l'introduction de la feuille dans des circonstances limites.Also, pressing a sheet against a cleat can cause the formation of an unsightly mark on the corresponding edge. The bead of this brand can also hinder the introduction of the sheet in borderline circumstances.
Le but de la présente invention consiste à procurer un procédé et un dispositif de positionnement d'éléments en plaque, tels que des feuilles de papier, de carton ou de matière similaire, dans la station d'introduction d'une machine de traitement, qui soit plus rapide afin de permettre une augmentation de la cadence, tout en restant très précis, notamment dans le cas de feuilles ayant reçu un traitement préalable. De préférence, le dispositif ne doit laisser aucune marque sur l'élément en plaque. La conception de ce dispositif doit toutefois rester relativement simple pour en augmenter la fiabilité, pour en simplifier la maintenance et en réduire autant que possible les coûts de réalisation.The object of the present invention is to provide a method and a device for positioning plate elements, such as sheets of paper, cardboard or the like, at the feed station processing machine, which is faster to allow an increase cadence, while remaining very precise, especially in the case of sheets having received prior treatment. Preferably, the device should not leave no mark on the plate element. The design of this device must however, remain relatively simple to increase reliability, to simplify maintenance and reduce costs as much as possible production.
Ces buts sont réalisés par un procédé de positionnement d'éléments en plaque dans la station d'introduction d'une machine de traitement consistant, à partir de la tablette en position arrière de départ, à enclencher des moyens de fixation d'un élément en plaque sur la tablette, puis à commander des actuateurs pour avancer la tablette en avant et si nécessaire de côté et/ou de travers en fonction des lectures de moyens optoélectroniques, effectuées au début de l'avance de la tablette, de telle sorte à amener et finalement arrêter le bord avant de l'élément en plaque dans les pinces d'une barre d'entraínement en une position prédéterminée, puis à relâcher les moyens de fixation, puis à ramener la tablette en position arrière de départ.These goals are achieved by a positioning process of plate elements in the introduction station of a processing machine consisting, from the shelf in the rear starting position, to engage means for fixing a plate element to the shelf, then to be ordered actuators to move the tablet forward and if necessary sideways and / or skewed according to the readings of optoelectronic means, taken at start of the tablet advance, so as to bring and ultimately stop the front edge of the plate element in the clamps of a drive bar in a predetermined position, then to release the fastening means, then to return the tablet to the rear starting position.
Ainsi, après la lecture de la position effective de l'élément en plaque par rapport à la tablette par les moyens optoélectroniques lors d'une première phase de l'avance de la tablette, la phase ultérieure d'avance peut être mise à profit pour effectuer des ajustements du déplacement de la tablette par rapport à sa course de base pour corriger de manière très dynamique les éventuelles erreurs longitudinales, latérales ou de travers de l'élément en plaque. Si l'élément en plaque est brut, les corrections sont effectuées sur la base du repérage de ses bords, si feuille a préalablement été traitée, les corrections sont avantageusement effectuées sur la base d'une marque de repérage du ou des signes distinctifs correspondant audit traitement. Les corrections réalisées ainsi à la volée permettent de ne pas devoir arrêter inutilement l'élément en plaque, donc d'augmenter sensiblement la cadence possible de la machine.So, after reading the actual position of the element in plate relative to the tablet by optoelectronic means during a first phase of advance of the tablet, the subsequent phase of advance can be used to make adjustments to the movement of the tablet compared to its base stroke to very dynamically correct the any longitudinal, lateral or skew errors of the element in plate. If the plate element is raw, the corrections are made on the base of the identification of its edges, if the sheet has been previously treated, the corrections are advantageously made on the basis of a mark of identification of the distinctive sign (s) corresponding to said treatment. The corrections made on the fly allow you not to have to stop unnecessarily the plate element, therefore significantly increasing the rate possible from the machine.
Le procédé de commande du dispositif de positionnement consiste donc, à partir de la position arrière de départ de la tablette, à commander les actuateurs pour avancer la tablette en avant jusqu'à ce que le bord frontal de l'élément en plaque ait été détecté par les moyens optoélectroniques, puis à commander l'actuateur correspondant pour déplacer transversalement la tablette jusqu'à ce que le bord latéral de l'élément en plaque ait été détecté par les moyens optoélectroniques.The positioning device control method consists of therefore, from the rear starting position of the tablet, order the actuators to advance the tablet forward until the front edge of the plate element has been detected by optoelectronic means, then at control the corresponding actuator to move the shelf until the side edge of the plate element has been detected by optoelectronic means.
De préférence, le procédé de commande consiste, à partir de la tablette en position arrière de départ, à commander les actuateurs pour avancer la tablette en avant à vitesse constante jusqu'à ce que la barre de pinces de la machine arrive en position d'attente de réception d'un élément en plaque, puis à commander les actuateurs pour effectuer des ajustements du déplacement de la tablette par rapport à sa course de base afin de corriger les éventuelles erreurs longitudinales, latérales ou de travers de l'élément en plaque déterminées en fonction des lectures des moyens optoélectroniques, et pour finalement arrêter le bord avant de l'élément en plaque en position dans les pinces de la barre d'entraínement.Preferably, the control method consists, from the shelf in rear starting position, order actuators for advance the tablet forward at a constant speed until the bar clamps of the machine arrives in the waiting position for receiving an item in plate, then order the actuators to make adjustments to the displacement of the tablet relative to its basic stroke in order to correct the any longitudinal, lateral or skew errors of the element in plate determined as a function of the readings of the optoelectronic means, and to finally stop the front edge of the plate element in position in the clamps of the drive bar.
En reportant ainsi les mouvements de correction de la tablette en fin de parcours seulement une fois que la barre de pinces est arrivée en position attente, on évite ainsi tout risque de collision néfaste entre ces deux éléments susceptibles d'être provoquée par une accélération imprévisible de la tablette.By thus deferring the correction movements of the tablet in only after the gripper bar has reached standby position, thus avoiding any risk of a harmful collision between these two elements likely to be caused by an unpredictable acceleration of the Tablet.
Le dispositif de positionnement d'éléments en plaque, dans la
station d'introduction d'une machine de traitement comprenant un dispositif de
transport composé par une ou plusieurs barres de pinces d'entraínement de
l'élément en plaque dans les stations ultérieures, comporte:
Les moyens de fixation temporaires pneumatiques de l'élément en plaque sur la tablette peuvent comprendre un maillage d'orifices ménagés sur la face supérieure de la tablette en communication avec une chambre interne reliée par un clapet électromagnétique d'ouverture/fermeture à une source de dépression. Toutefois, de tels moyens pneumatiques s'avèrent relativement lents et délicats à mettre en ouvre.The temporary pneumatic fastening means of the element in plate on the shelf may include a mesh of orifices provided on the upper face of the tablet in communication with an internal chamber connected by an electromagnetic opening / closing valve to a source of depression. However, such pneumatic means prove to be relatively slow and delicate to implement.
Selon un mode de réalisation préféré, les moyens de fixation temporaires comprennent un peigne monté mobile en pivotement au dessus, à proximité et parallèlement au bord avant échancré de la tablette, les doigts du peigne étant orientés vers l'avant de telle sorte à ce que chacun d'entre eux forme avec chaque protubérance de tablette séparant une échancrure une pince de saisie du bord avant de l'élément en plaque, ainsi que des moyens de commande de la position angulaire du peigne.According to a preferred embodiment, the fixing means temporary include a comb mounted to move pivotally above, near and parallel to the notched front edge of the tablet, the fingers of the comb being oriented forward so that each of them form with each protuberance of a shelf separating a notch a gripper for gripping the front edge of the plate element, as well as means for control of the angular position of the comb.
Utilement, les moyens de commande de la position angulaire du peigne comprennent d'une part un ou plusieurs ressorts agencés entre la tablette et la barre arrière de raccordement des doigts du peigne de telle sorte que, au repos, ce ressort remonte la barre arrière et maintient ce peigne fermé, c'est-à-dire avec les doigts en appui sur leur protubérance de tablette, et d'autre part, solidaires de la station, un ou plusieurs organes de commande sus-jacents à déplacement vertical, tels que l'extrémité d'un levier actionné en rotation ou la tige de sortie d'un vérin pneumatique ou électromagnétique, et chacun relié par une bielle pendulaire télescopique à la barre arrière du peigne de telle sorte à pouvoir, en position basse, appuyer et abaisser la barre arrière du peigne et ainsi maintenir le peigne ouvert pendant un déplacement de la tablette.Usefully, the means for controlling the angular position of the comb comprise on the one hand one or more springs arranged between the shelf and the rear bar connecting the fingers of the comb so that, at rest, this spring goes up the rear bar and keeps this comb closed, that is to say with the fingers resting on their protuberance of the tablet, and on the other hand, integral with the station, one or more control members overlying vertical displacement, such as the end of a lever actuated in rotation or the output rod of a pneumatic or electromagnetic cylinder, and each connected by a telescopic pendulum rod to the rear bar of the comb so that you can press and lower the rear bar in the low position of the comb and thus keep the comb open during a displacement of the Tablet.
Ainsi, lorsque la bielle pendulaire télescopique est en position haute avec sa tige coulissant librement lors de l'avance de la tablette, le ressort garantit une fermeture effective du peigne, donc un maintien ferme de l'élément en plaque pendant son amenée et ses corrections de position. Lorsque la bielle télescopique est par contre en position basse avec sa tige en butée lors du retrait de la tablette de retour vers sa position de départ arrière, elle ouvre le peigne et le maintient ainsi ouvert malgré le déplacement de celle tablette grâce à l'agencement pendulaire de celle bielle.So when the telescopic pendulum rod is in position high with its rod sliding freely when advancing the tablet, the spring guarantees effective closing of the comb, thus a firm hold of the element in plate during its supply and its position corrections. When the connecting rod on the other hand is in the low position with its rod in abutment during removing the shelf back to its rear starting position, it opens the comb and keep it open despite the displacement of the tablet thanks to the pendulum arrangement of this connecting rod.
Ainsi, l'élément en plaque est tenu le long de son bord avant de manière régulière et avec une pression pratiquement constante pour éviter la formation de toute marque néfaste. De plus, le fait de tenir ce bord avant bien à plat sur les protubérances de tablette permet d'insérer ce bord d'élément en plaque sans aucun risque d'accroc dans les pinces ouvertes de la barre d'entraínement de la machine.Thus, the plate element is held along its edge before regularly and with almost constant pressure to avoid formation of any harmful mark. In addition, holding this front edge well flat on the shelf protrusions allows this element edge to be inserted in plate without any risk of snagging in the open clamps of the bar machine drive.
Selon un mode de réalisation préféré, la translation longitudinale est effectuée par un actuateur de précision qui assure le déplacement et la correction de position longitudinale.According to a preferred embodiment, the longitudinal translation is performed by a precision actuator which ensures the displacement and longitudinal position correction.
Selon un mode de réalisation avantageux, la tablette est montée de chaque côté sur un pivot vertical latéral respectivement solidaire d'un chariot déplacé le long d'une glissière longitudinale par un actuateur linéaire supporté par la traverse de base.According to an advantageous embodiment, the tablet is mounted each side on a lateral vertical pivot respectively secured to a carriage moved along a longitudinal slide by a supported linear actuator by the base rail.
Alors, lorsque les actuateurs avancent en synchronisme, la tablette effectue simplement un déplacement en translation complémentaire purement longitudinal vers l'avant. Par contre, l'introduction d'un léger décalage entre les déplacements de chacun des actuateurs latéraux permet de mettre volontairement la tablette de travers selon une rotation autour d'un axe vertical pour rattraper un travers initial de l'élément en plaque.So when the actuators move in synchronism, the tablet simply performs a purely complementary translational movement longitudinal forward. On the other hand, the introduction of a slight gap between the displacements of each of the side actuators allows to put voluntarily the cross shelf in a rotation about a vertical axis to make up for an initial cross of the plate element.
Selon un autre mode de réalisation avantageux, la tablette est montée en son milieu sur un pivot vertical central et de chaque côté sur un pivot vertical latéral, le pivot central étant solidaire d'un chariot coulissant dans une glissière longitudinale susceptible d'être déplacée transversalement par un premier actuateur linéaire, chaque pivot latéral étant solidaire d'un chariot coulissant dans une glissière transversale susceptible d'être déplacée longitudinalement respectivement par un second et troisième actuateur linéaire, les premier, second et troisième actuateurs étant supportés sur la traverse de base.According to another advantageous embodiment, the tablet is mounted in the middle on a central vertical pivot and on each side on a lateral vertical pivot, the central pivot being integral with a sliding carriage in a longitudinal slide capable of being moved transversely by a first linear actuator, each lateral pivot being integral with a carriage sliding in a cross slide capable of being moved longitudinally respectively by a second and third linear actuator, the first, second and third actuators being supported on the crossmember of based.
Comme précédemment, lorsque les deuxième et troisième actuateurs avancent en synchronisme, la tablette effectue simplement un déplacement en translation purement longitudinale vers l'avant, le chariot du pivot central ne faisant que suivre le mouvement au sein de sa glissière longitudinale. Par ailleurs, l'introduction d'un léger décalage entre les déplacements des second et troisième actuateurs permet d'induire volontairement un travers dans la tablette pour rattraper une erreur initiale correspondante de l'élément en plaque. Par contre, la mise en ouvre du premier actuateur induit un déplacement transversal à la tablette, les chariots des pivots latéraux ne faisant que suivre ce mouvement au sein de leur glissière transversale.As before, when the second and third actuators move in synchronism, the tablet simply performs a purely longitudinal translation forward, the carriage central pivot only following the movement within its slide longitudinal. Furthermore, the introduction of a slight gap between the displacements of the second and third actuators allows to induce willfully a crosstalk in the tablet to make up for an initial error corresponding to the plate element. However, the implementation of the first actuator induces a transverse movement to the tablet, the carriages lateral pivots only following this movement within their transverse slide.
Grâce à celle cinématique symétrique par rapport au plan vertical longitudinal médian, on peut aisément imprimer à la tablette une quelconque correction longitudinale, transversale ou en pivotement sur elle-même, et ceci par pilotage séparé de seulement trois actuateurs linéaires.Thanks to the symmetrical kinematics with respect to the vertical plane longitudinal median, you can easily print any tablet longitudinal, transverse or pivoting correction on itself, and this by separate control of only three linear actuators.
Dans ce dernier dispositif de positionnement selon l'invention, le premier actuateur est asservi en position par rapport à une consigne qui est établie en fonction de l'erreur de position transversale de l'élément en plaque telle que lue par les moyens optoèlectroniques. Les second et troisième actuateurs sont quant à eux asservis en position selon une consigne de correction d'erreurs longitudinales et/ou de travers telles que lues également par les moyens optoélectroniques. Quant à l'actuateur de la tablette, il est asservi en position selon une consigne fuyante en référence au cycle de la machine, usuellement repéré par l'angle de l'arbre de sortie du moteur principal, cette consigne fuyante étant représentative du déplacement de base d'avant en arrière d'amenée de l'élément en plaque.In this latter positioning device according to the invention, the first actuator is slaved in position relative to a setpoint which is established according to the transverse position error of the plate element as read by optoelectronic means. The second and third actuators are slaved in position according to a setpoint of correction of longitudinal and / or skew errors as also read by optoelectronic means. As for the tablet actuator, it is slaved in position according to a fleeting instruction with reference to the cycle of the machine, usually identified by the angle of the motor output shaft main, this fleeting instruction being representative of the basic displacement from front to back for supplying the plate element.
Comme actuateur linéaire, on peut envisager un chariot coulissant le long d'une glissière et dont le taraudage transversal est engagé sur une tige filetée sans fin dont l'une des extrémités est entraínée en rotation par un moteur électrique. On peut également envisager une crémaillère montée libre en coulissement sur des paliers et dont les dents sont en prise avec un pignon entraíné par un moteur électrique. Toutefois, ces actuateurs mettent en ouvre des liaisons mécaniques intermédiaires transformant le mouvement de rotation de l'arbre de sortie d'un moteur électrique en un mouvement de translation, lesquelles liaisons présentent toujours une relative inertie et un certain jeu de fonctionnement.As a linear actuator, we can consider a sliding carriage along a slide and whose transverse thread is engaged on a rod endless threaded one end of which is rotated by a electric motor. We can also consider a free-mounted rack sliding on bearings and whose teeth are engaged with a pinion driven by an electric motor. However, these actuators are implementing intermediate mechanical links transforming the rotational movement the output shaft of an electric motor in a translational movement, which links always have a relative inertia and a certain play of operation.
Selon un mode de réalisation préféré, les actuateurs linéaires sont des moteurs électriques linéaires dont le rotor se présente sous la forme d'une barre mobile en translation garnie d'une série d'aimants permanents passant devant une ou plusieurs boucles d'un stator alimenté en courant électrique, cette barre supportant directement soit le support de pivot, soit la glissière transversale au sein de laquelle coulisse le chariot de pivot.According to a preferred embodiment, the linear actuators are linear electric motors, the rotor of which is in the form of a bar movable in translation furnished with a series of permanent magnets passing in front of one or more loops of a stator supplied with electric current, this bar directly supporting either the pivot support or the slide transverse within which slides the pivot carriage.
Grâce à de tels moteurs électriques linéaires, on agit directement de manière très dynamique sur la pièce à déplacer, que ce soit le support de pivot ou une glissière intermédiaire. Notamment, en cas de risque de conflit entre la tablette et la barre de pinces, il suffit d'inverser la polarité de branchement des boucles de stator pour pouvoir instantanément stopper et reculer la tablette.Thanks to such linear electric motors, we act directly very dynamically on the part to be moved, whether it is the support of pivot or an intermediate slide. In particular, in the event of a risk of conflict between the shelf and the clamp bar, simply reverse the polarity of connection of the stator loops to be able to instantly stop and move the tablet back.
Dans le cas d'éléments en plaque bruts, les moyens optoélectroniques de détection des bords de l'élément peuvent ne comprendre qu'une paire de cellules photoélectriques frontales et une cellule photoélectrique latérale.In the case of raw plate elements, the means optoelectronic element edge detection may not include than a pair of front photocells and a cell lateral photoelectric.
Selon une alternative avantageuse, les moyens optoélectroniques de détection du bord latéral de l'élément en plaque peuvent être une rangée de cellules photoélectriques ou barrette CCD, ce qui permet d'éviter d'imprimer à la tablette un déplacement transversal spécialement pour repérer le bord latéral.According to an advantageous alternative, optoelectronic means side element detection plate can be a row of photocells or CCD strip, which avoids printing at the tablet a transverse movement specially to locate the edge lateral.
Dans le cas d'éléments en plaque ayant subi au préalable un ou plusieurs traitements, les moyens optoélectroniques de détection de la ou des marques ou autres signes distinctifs du traitement préalable peuvent être une matrice CCD ou autre caméra saisissant une image de l'élément en plaque lors du passage de la tablette. On connaít des moyens électroniques de traitement de l'image permettant de repérer des marques et leur formes afin d'en déduire des erreurs de positionnement longitudinal et latéral.In the case of plate elements having previously undergone one or several treatments, the optoelectronic means for detecting the marks or other distinctive signs of prior processing may be a CCD matrix or other camera capturing an image of the plate element during the passage of the tablet. We know electronic means of processing of the image making it possible to identify marks and their forms in order to deduce therefrom longitudinal and lateral positioning errors.
L'invention sera mieux comprise à l'étude d'un mode de réalisation pris à titre nullement limitatif et illustré dans les figures annexées dans lesquelles :
- la figure 1 est une vue schématique en perspective d'un dispositif de positionnement selon l'invention,
- la figure 2 est une vue schématique des moyens optoélectroniques et des moyens électroniques de commande du dispositif de positionnement selon l'invention, et
- la figure 3 est un diagramme du déplacement de la tablette du dispositif de positionnement selon l'invention en fonction d'une référence du cycle de la machine.
- FIG. 1 is a schematic perspective view of a positioning device according to the invention,
- FIG. 2 is a schematic view of the optoelectronic means and the electronic means for controlling the positioning device according to the invention, and
- Figure 3 is a diagram of the movement of the tablet of the positioning device according to the invention as a function of a reference of the machine cycle.
Sur la partie gauche de la figure 1 est illustrée une barre de pinces
10 présentant en son bord arrière une pluralité de barres 12 prévues pour
appréhender le bord frontal d'une feuille 5. Cette barre 10 est accrochée en
chacune de ses deux extrémités latérales à une chaíne d'entraínement vers
des stations de traitement ultérieures puis de retour selon une boucle
supérieure vers la position initiale d'attente de réception d'une nouvelle feuille.On the left side of Figure 1 is illustrated a bar of
Plus particulièrement selon l'invention, une feuille 5 est amenée et
positionnée de manière exacte dans les pinces 12 au moyen d'une tablette
horizontale 14 effectuant d'une part un déplacement longitudinal alternatif
d'avant en arrière pour chercher cette feuille et l'amener et d'autre part
effectuant des déplacements de correction tenant compte de la position
effective de celle feuille sur cette tablette.More particularly according to the invention, a
A ce titre, la tablette 14 est d'abord montée sur une traverse de
base horizontale 8 pouvant pivoter suivant son axe horizontal, assurant ainsi le
transfert de l'élément en plaque de ladite tablette 14 à la pince 12 portée par la
barre de pince 10.As such, the
Plus particulièrement selon l'invention, la tablette, montée sur la
traverse 8, est mobile en translation longitudinale, en translation transversale
et de travers c'est-à-dire en rotation instantanée autour d'un axe vertical.
Notamment, cette tablette 14 est articulée sur trois pivots verticaux
respectivement un central 48 et deux latéraux : un 68 à gauche dit "côté
conducteur" CC et un 58 à droite dit "côté opposé au conducteur" COC. Le
pivot d'articulation central 48 est solidaire d'un chariot coulissant à l'intérieur
d'une glissière longitudinale 46, alors que les chariots des pivots latéraux 58 et
68 sont tous deux coulissants à l'intérieur de glissières transversales 56 COC et
66 CC.More particularly according to the invention, the tablet, mounted on the
cross member 8 is movable in longitudinal translation, in transverse translation
and askew that is to say instantaneous rotation about a vertical axis.
In particular, this
La glissière centrale longitudinale 46 est quant à elle supportée par
une barre mobile 44 comprenant des aimants permanents et formant le stator
mobile d'un moteur électrique linéaire central 40 dont le stator 42 repose par un
socle 41 au centre de la traverse de base 8. De manière analogue, la glissière
transversale COC 56 et la glissière transversale CC 66 sont solidaires
respectivement d'une barre COC 54 et d'une barre CC 64 à aimants
permanents formant un rotor de moteur électrique linéaire COC 50 et CC 60
dont les stators respectivement 52 et 62 reposent par leur socle 51 et 61 en
chacune des extrémités de la traverse 8 de base. The longitudinal
Les barres mobiles 44, 54, 64 peuvent présenter une rangée
d'aimants permanents sur l'une des faces de la barre, le stator ne comprenant
alors qu'un seul enroulement en vis-à-vis ; ou, de préférence, une rangée
d'aimants permanents de part et d'autre, le stator présentant alors deux
enroulements respectivement en regard de chacune des rangées. De tels
actuateurs à aimants permanents ayant un bon rendement dynamique sont
disponibles dans le commerce, notamment sont commercialisés par la société
suisse ETEL sous la référence LMA11/50.The
Ces moteurs linéaires 40, 50, 60 sont principalement prévus pour
imprimer à la tablette 14 des déplacements et des corrections de l'ordre de dix
à vingt millimètres sur une course totale d'environ cent millimètres. Notamment,
si les deux actuateurs linéaires COC 50, CC 60 avancent en synchronisme, la
tablette 14 effectue un déplacement purement en translation longitudinale vers
la barre de pinces 10. Par contre, si l'un des moteurs linéaires 50, 60 présente
volontairement un déplacement d'amplitude différent de celui de l'autre, ceci
entraíne une mise en travers de la barre 14 par pivotement autour du pivot 48
pouvant simultanément avancer ou reculer. En outre, la mise en oeuvre du
moteur électrique linéaire central 40 induit un mouvement transversal à la
tablette 14, les pivots 58 et 68 suivant ce mouvement à l'intérieur de leur
glissière respective 56, 66.These
Par ailleurs, la feuille 5 est temporairement fixée à la tablette 14 par
une série de pinces avant composées d'une part de protubérances 16 de bord
avant de tablette coopérantes avec des doigts 22 d'un peigne 20. Notamment,
les protubérances de bord de tablette 16 délimitent des échancrures 17 situées
en correspondance avec les pinces 12 de la barre 10, ces échancrures étant
sensiblement plus larges que les pinces 12 afin d'autoriser les éventuels
déplacements transversaux de la tablette 14 imprimés par le moteur linéaire
central 40.Furthermore, the
Les doigts 22 sont reliés par une barrette arrière 21 pour former
ensemble un peigne 20 monté en chacune de ses extrémités latérales en
pivotement par des bras 24 et 25 permettant l'ouverture puis la fermeture des
pinces de tablettes. Plus particulièrement selon l'invention, deux ressorts
latéraux COC (côté opposé au conducteur) 26 et CC (côté conducteur) 27 sont
agencés entre la tablette 14 et la barrette arrière 21 de peigne 20 de telle sorte
à maintenir, normalement au repos, le peigne 20 donc les pinces 16, 22, à l'état
fermé. Cette pince est notamment fermée lorsqu'elle entraíne avec elle une
feuille 5 pour l'amener et la positionner dans les pinces 12 de la barre 10.The
Un mécanisme d'ouverture volontaire du peigne 20 comprend, en
chaque extrémité latérale, une bielle télescopique pendulaire COC 34 et CC 35
articulée au niveau de la barrette arrière de peigne 21 par une rotule inférieure
33, et en l'extrémité d'un levier 31 par une rotule supérieure 32, le levier 31
étant susceptible d'être monté ou descendu par un disque de rotation 30. Ainsi,
lorsque le levier 31 est maintenu en position haute, le bras de la bielle
télescopique coulisse librement et n'exerce aucun effet sur la barrette 21 qui
est alors repoussée vers le haut par les ressorts 26, 27. A l'inverse, notamment
pendant tout le trajet de retour de la tablette 14 vers la position arrière, les
disques 30 ont pivoté dans le sens des aiguilles d'une montre pour abaisser
leurs leviers respectifs 31, la tige de bielle télescopique venant en butée de
telle sorte à appuyer sur la barrette arrière 21 et ainsi basculer vers le haut les
doigts de pinces 22. Un possible déplacement en pivotement des bielles autour
de leur extrémité supérieure 32 permet de maintenir volontairement les peignes
20 ouverts pendant tout le trajet de retour.A voluntary opening mechanism of the
Il convient de noter que le bord arrière 18 de la tablette 14 est
oblique orienté vers le bas pour faciliter l'introduction d'une nouvelle feuille sur
sa face supérieure, donc dans les pinces 26/22. Il est bien entendu que le
mécanisme d'ouverture du peigne 20 pourrait avantageusement être construit
en remplaçant la bielle télescopique pendulaire COC 34, respectivement CC
35, comportant un second disque de rotation relié à une came tout en étant
indépendant du disque 30 de manière à générer une course autorisant
l'utilisation d'une tirette non télescopique.It should be noted that the
Sur la figure 2 sont illustrés schématiquement les moyens de contrôle du dispositif de positionnement décrit en référence à la figure 1.In Figure 2 are schematically illustrated the means of control of the positioning device described with reference to Figure 1.
On y reconnaít notamment les barres-rotors et les stators
respectivement COC 54/52, centrales 42/44 et CC 64/62 des moteurs linéaires
supportant la tablette 14 sur la traverse 8. Comme illustré, chaque barre-rotor
présente une réglette graduée pour lecture par une cellule respectivement 43,
53, 63 permettant de générer un signal de contre-réaction permettant de piloter
les moteurs électriques linéaires par asservissement en position suivant une
courbe fuyante de consigne de position, ce contrôle étant effectué de manière
connue au sein d'un microprocesseur 100. We recognize in particular the rotor bars and stators
COC 54/52, central 42/44 and
Par ailleurs, le dispositif de positionnement selon l'invention
comprend une paire de cellules côte-à-côte 72, 64 de détection du bord frontal
d'une feuille 5 et une barrette de cellule latérale 76 permettant de détecter le
bord latéral de cette même feuille. Les résultats de la lecture de ces cellules
sont appliqués également au microprocesseur 100. Si désiré, le dispositif peut
comporter en outre une cellule de lecture 70 de détection de la présence d'une
feuille à saisir ou de la détection du passage de la tablette seulement après un
moment prédéterminé pour éviter toute collision possible avec la barre de
pinces 10.Furthermore, the positioning device according to the invention
includes a pair of side-by-
Le mode de fonctionnement du dispositif de positionnement selon
les figures 1 et 2 sera mieux compris à l'étude du diagramme de la figure 3
illustrant la course de la tablette 14 lors d'un cycle de machine. La référence
d'un cycle est usuellement la position angulaire de l'arbre de sortie du moteur
principal, l'abscisse du diagramme correspondant à un tour complet de 360°.
Ce cycle débute et s'achève à la même référence "machine" de 220°
correspondant au moment où la tablette est momentanément le plus en arrière
immobile prête à repartir.The operating mode of the positioning device according to
Figures 1 and 2 will be better understood when studying the diagram in Figure 3
illustrating the stroke of the
Lors d'une première phase, la tablette 14 démarre en avant et
prend de la vitesse pour atteindre celle d'avancée de la feuille qu'elle saisit à la
volée à l'instant S, les disques 30 des leviers 31 tournant rapidement en sens
inverse des aiguilles d'une montre pour relâcher le peigne et fermer les pinces
16/22.During a first phase, the
Pendant la phase suivante Zlec, de durée d'environ 30°, le bord
frontal de la feuille 5 est détecté par la paire de cellules 72, 4 et le bord latéral
est détecté par la barrette de cellule 76, permettant au microprocesseur 100,
connaissant la course de base de la tablette 14, de déterminer l'erreur de
positionnement de la feuille 5 par rapport à sa position théorique. Le
microprocesseur peut alors établir la présence, ou l'absence et l'ampleur
d'éventuelles erreurs de positionnement tant longitudinales que transversales
voire de travers de la feuille et établir des consignes de correction.During the next Zlec phase, lasting approximately 30 °, the edge
front of
La phase ultérieure Av, de durée d'environ 30°, correspond à une
amenée de la feuille par la tablette 14 à une vitesse constante calculée de telle
sorte à d'abord laisser passer et arriver la barre de pinces 10 en position
d'attente.The subsequent phase Av, lasting approximately 30 °, corresponds to a
brought from the sheet by the
Une fois la barre de pinces passée, le microprocesseur 100 peut
alors appliquer aux moteurs électriques linéaires 40, 50, 60, les consignes de
correction de telle sorte à déplacer la tablette en conséquence. Celle phase Z
de correction a une durée de l'ordre de 90° et l'amplitude de la course de la
tablette est alors dépendante de l'ampleur des corrections comme représenté
par la course minimum et maximum.Once the clamp bar has passed, the
La phase suivante Ar, de durée d'environ 20°, correspond à l'arrêt
du bord frontal de la feuille 5 au milieu des pinces 12 qui se referment,
permettant seulement alors l'ouverture du peigne 20 par descente des leviers
31.The next phase Ar, lasting approximately 20 °, corresponds to the stop
from the front edge of the
La phase R correspond au retour de la tablette en position initiale de départ à vitesse constante, ce déplacement étant d'une part imprimé par la traverse de base 8 et d'autre part par les moteurs électriques linéaires revenant respectivement en position neutre. Un nouveau cycle d'amenée d'une feuille peut alors recommencer.Phase R corresponds to the return of the tablet to the initial position at constant speed, this displacement being on the one hand imprinted by the basic cross member 8 and on the other hand by linear electric motors returning respectively in neutral position. A new leaf feeding cycle can then start again.
Comme on a pu le constater à la lecture de cet exposé, le dispositif de positionnement d'un élément en plaque selon l'invention est remarquable dans la mesure où il parvient à saisir une feuille à la volée et, tout en l'amenant vers les pinces de la barre d'entraínement, à lire sa position pour calculer d'éventuelles erreurs, et, tout en poursuivant son avance, à compenser ces éventuelles erreurs pour finalement positionner cette feuille juste à temps de manière remarquablement précise au sein des pinces de la barre. A l'inverse des dispositifs à taquets selon l'état de la technique, la correction de positionnement n'a nécessité ici aucun arrêt de la progression de la feuille ce qui permet d'augmenter sensiblement la cadence de la machine pour atteindre des valeurs jusqu'à 12000 feuilles/heure. L'emploi de moteurs électriques linéaires simplifie sensiblement la conception du dispositif donc ses coûts de réalisation et sa maintenance.As we have seen from this presentation, the system positioning of a plate element according to the invention is remarkable to the extent that he manages to grab a sheet on the fly and, while bringing it towards the clamps of the drive bar, to read its position to calculate possible errors, and, while continuing to advance, to compensate for these possible errors to finally position this sheet just in time to remarkably precise within the bar clamps. Conversely cleat devices according to the state of the art, the correction of positioning here did not need to stop the progression of the sheet this which significantly increases the speed of the machine to reach values up to 12,000 sheets / hour. The use of electric motors linear significantly simplifies the design of the device therefore its costs of realization and maintenance.
De nombreuses améliorations peuvent être apportées à ce dispositif dans le cadre des revendications.Many improvements can be made to this device within the scope of the claims.
Claims (10)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH00671/99A CH693378A5 (en) | 1999-04-09 | 1999-04-09 | A method of positioning sheet elements in the introduction station of a processing machine and device for carrying out the method. |
CH67199 | 1999-04-09 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1044908A1 true EP1044908A1 (en) | 2000-10-18 |
EP1044908B1 EP1044908B1 (en) | 2003-05-28 |
Family
ID=4192452
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00105172A Revoked EP1044908B1 (en) | 1999-04-09 | 2000-03-11 | Method for positionning plate-shaped products in a feeding station of a treatment machine and device for carrying out the method |
Country Status (14)
Country | Link |
---|---|
US (1) | US6378862B1 (en) |
EP (1) | EP1044908B1 (en) |
JP (1) | JP2000327179A (en) |
KR (1) | KR100337044B1 (en) |
CN (1) | CN1114553C (en) |
AT (1) | ATE241556T1 (en) |
AU (1) | AU770094B2 (en) |
BR (1) | BR0001565B1 (en) |
CA (1) | CA2304419C (en) |
CH (1) | CH693378A5 (en) |
DE (1) | DE60002942T2 (en) |
DK (1) | DK1044908T3 (en) |
ES (1) | ES2200742T3 (en) |
TW (1) | TW562744B (en) |
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EP1772405A1 (en) | 2005-10-05 | 2007-04-11 | Bobst S.A. | Method for positioning plate-shaped products in a treatment machine |
WO2010063380A1 (en) * | 2008-12-05 | 2010-06-10 | Bobst Sa | Method of calibration in a machine for processing plate-like items |
WO2010086087A1 (en) | 2009-02-02 | 2010-08-05 | Bobst Sa | Device for positioning a plate element in an insertion station of a processing machine |
EP2014589A3 (en) * | 2007-07-09 | 2010-11-10 | Heidelberger Druckmaschinen Aktiengesellschaft | Sheet-fed punching and embossing machine and method for sheet alignment |
WO2011009567A1 (en) | 2009-07-24 | 2011-01-27 | Bobst Sa | Device and method for positioning plate elements in a treatment machine |
DE102011116220A1 (en) | 2011-10-17 | 2013-04-18 | Heidelberger Druckmaschinen Aktiengesellschaft | Method for operating sheet punching machine for punching sheets used for packing e.g. cosmetics, involves controlling linear electromagnetic actuators during sheet transport process such that sheet is greatly accelerated |
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- 2000-03-11 ES ES00105172T patent/ES2200742T3/en not_active Expired - Lifetime
- 2000-03-11 DK DK00105172T patent/DK1044908T3/en active
- 2000-03-11 DE DE60002942T patent/DE60002942T2/en not_active Revoked
- 2000-03-11 AT AT00105172T patent/ATE241556T1/en not_active IP Right Cessation
- 2000-03-11 EP EP00105172A patent/EP1044908B1/en not_active Revoked
- 2000-03-15 US US09/525,504 patent/US6378862B1/en not_active Expired - Lifetime
- 2000-03-29 AU AU22656/00A patent/AU770094B2/en not_active Expired
- 2000-04-03 CA CA002304419A patent/CA2304419C/en not_active Expired - Lifetime
- 2000-04-07 BR BRPI0001565-2A patent/BR0001565B1/en not_active IP Right Cessation
- 2000-04-07 CN CN00105812A patent/CN1114553C/en not_active Expired - Lifetime
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Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1151833A2 (en) * | 2000-05-05 | 2001-11-07 | Bobst S.A. | Apparatus for positioning sheets in a machine station |
EP1151833A3 (en) * | 2000-05-05 | 2003-10-22 | Bobst S.A. | Apparatus for positioning sheets in a machine station |
EP1739039A2 (en) * | 2005-06-28 | 2007-01-03 | Heidelberger Druckmaschinen Aktiengesellschaft | Method and device for transporting sheets to a printing machine |
EP1739039A3 (en) * | 2005-06-28 | 2009-04-15 | Heidelberger Druckmaschinen Aktiengesellschaft | Method and device for transporting sheets to a printing machine |
EP1772405A1 (en) | 2005-10-05 | 2007-04-11 | Bobst S.A. | Method for positioning plate-shaped products in a treatment machine |
US7603198B2 (en) | 2005-10-05 | 2009-10-13 | Bobst S.A | Method of positioning thin flat objects in a processing machine |
EP2014589A3 (en) * | 2007-07-09 | 2010-11-10 | Heidelberger Druckmaschinen Aktiengesellschaft | Sheet-fed punching and embossing machine and method for sheet alignment |
WO2010063380A1 (en) * | 2008-12-05 | 2010-06-10 | Bobst Sa | Method of calibration in a machine for processing plate-like items |
KR101285421B1 (en) * | 2008-12-05 | 2013-07-12 | 봅스트 맥스 에스에이 | Method of calibration in a machine for processing plate-like items |
US8667658B2 (en) | 2008-12-05 | 2014-03-11 | Bobst Mex Sa | Calibration method in a machine for processing plate elements |
WO2010086087A1 (en) | 2009-02-02 | 2010-08-05 | Bobst Sa | Device for positioning a plate element in an insertion station of a processing machine |
WO2011009567A1 (en) | 2009-07-24 | 2011-01-27 | Bobst Sa | Device and method for positioning plate elements in a treatment machine |
KR101273058B1 (en) * | 2009-07-24 | 2013-06-10 | 봅스트 맥스 에스에이 | Device and method for positioning plate elements in a treatment machine |
US8960410B2 (en) | 2009-07-24 | 2015-02-24 | Bobst Mex Sa | Device and method for placing plate-like elements in a processing machine |
DE102011116220A1 (en) | 2011-10-17 | 2013-04-18 | Heidelberger Druckmaschinen Aktiengesellschaft | Method for operating sheet punching machine for punching sheets used for packing e.g. cosmetics, involves controlling linear electromagnetic actuators during sheet transport process such that sheet is greatly accelerated |
US10717616B2 (en) | 2016-05-24 | 2020-07-21 | Bobst Mex Sa | Register, a processing machine and a method for placing plate-like elements |
Also Published As
Publication number | Publication date |
---|---|
CA2304419C (en) | 2004-05-25 |
KR100337044B1 (en) | 2002-05-16 |
CA2304419A1 (en) | 2000-10-09 |
JP2000327179A (en) | 2000-11-28 |
DE60002942D1 (en) | 2003-07-03 |
KR20000071624A (en) | 2000-11-25 |
AU770094B2 (en) | 2004-02-12 |
DK1044908T3 (en) | 2003-09-22 |
TW562744B (en) | 2003-11-21 |
ATE241556T1 (en) | 2003-06-15 |
BR0001565B1 (en) | 2009-05-05 |
AU2265600A (en) | 2000-10-12 |
CN1270134A (en) | 2000-10-18 |
DE60002942T2 (en) | 2004-03-11 |
EP1044908B1 (en) | 2003-05-28 |
ES2200742T3 (en) | 2004-03-16 |
BR0001565A (en) | 2000-10-31 |
CH693378A5 (en) | 2003-07-15 |
US6378862B1 (en) | 2002-04-30 |
CN1114553C (en) | 2003-07-16 |
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