EP2391566B1 - Device for positioning a flat element in an entrance station of a processing machine - Google Patents
Device for positioning a flat element in an entrance station of a processing machine Download PDFInfo
- Publication number
- EP2391566B1 EP2391566B1 EP10700708.0A EP10700708A EP2391566B1 EP 2391566 B1 EP2391566 B1 EP 2391566B1 EP 10700708 A EP10700708 A EP 10700708A EP 2391566 B1 EP2391566 B1 EP 2391566B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- holding means
- motor
- plate
- positioning
- cut
- 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.)
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Links
- 238000012545 processing Methods 0.000 title claims description 19
- 238000011144 upstream manufacturing Methods 0.000 claims description 22
- 238000001514 detection method Methods 0.000 claims description 19
- 238000005520 cutting process Methods 0.000 description 19
- 238000006073 displacement reaction Methods 0.000 description 11
- 230000006870 function Effects 0.000 description 11
- 238000007639 printing Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000012937 correction Methods 0.000 description 4
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 230000005693 optoelectronics Effects 0.000 description 3
- -1 polyethylene Polymers 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 238000004049 embossing Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 229920002457 flexible plastic Polymers 0.000 description 1
- 238000007647 flexography Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000007641 inkjet printing Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
Images
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
-
- 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
- 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
- B65H9/103—Pusher and like movable registers; Pusher or gripper devices which move articles into registered position acting by friction or suction on the article for pushing or pulling it into registered position, e.g. against a stop
- B65H9/105—Pusher and like movable registers; Pusher or gripper devices which move articles into registered position acting by friction or suction on the article for pushing or pulling it into registered position, e.g. against a stop using suction means
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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
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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
- B65H2511/22—Distance
- B65H2511/222—Stroke
-
- 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 device for positioning a plate element in an introduction station.
- the invention relates to an insertion station comprising such a device for positioning a plate element.
- the invention also relates to a processing machine incorporating such an introduction station.
- a processing machine for example a platen cut forming machine, is used in particular in the printing and packaging industry, for example for the manufacture of cardboard boxes from plate elements such as only leaves.
- the plate elements are removed from a stack located upstream of the machine, being taken by an introducer in an introducer station. These plate elements are grasped by a conveyor, in the form of clamp bars mounted at regular intervals on a train of endless chains. The latter makes it possible to take the elements in plate in the different subsequent stations of treatment of the machine.
- the train of chains moves and stops periodically in a timed run, so that during each move, all gripper bars that have gripped a plate member are moved from an upstream station to the adjacent downstream station that follows.
- the stations are successively a cutting station of the plate elements with a shape to be cut, a waste ejection station with an ejection form and a stack receiving station of these cut sheet elements. .
- the positioning of the plate elements within the different successive stations is a primordial operation.
- the positioning of the plate element must be precise so that the cutting tools are in perfect register with the printing or with the transformations that have been made beforehand on the plate element.
- the carrier ensures very precise transportation and shutdown of plate at different stations. This positioning therefore depends on the accuracy of the passage from the plate element, being free, to the plate element, being grasped by the conveyor, this passage being made in the insertion station.
- positioning devices consist in pressing the plate element on a margin table or various type of introducer against abutments or front and lateral stops by means of advancing members, such as rollers. or bands.
- advancing members such as rollers. or bands.
- the front and side cleats used are precisely arranged in relation to the following stations. The plate member is thus quickly tapped by the advancing members, and then grasped by the clip bar. The cleats are then retracted, and the clamp bar carries the plate element in the next processing station and positions it accurately with respect to the tools of the plate of this station.
- a positioning device in which optoelectronic reading means, such as a camera, are arranged above the margin table.
- the camera can read the front and side edges of the plate element or a printed area by a printing mark or other distinctive sign of the pre-treatment.
- Cleats are motorized, so as to be able to control a variation and an adjustment of their position and therefore of the plate element, according to the information received by the camera and according to parameters stored in a memory.
- this lug positioning device implies that the advance of each plate member is substantially stopped at the time of jogging and adjustment. This substantially limits the possible rate of scrolling of the plate elements in the machine.
- the document DE-25.20.232 discloses a device for feeding a machine with plate elements.
- a plate member from a collection point, is pushed to front cleats, located at the front of a shelf.
- the element in plate is retained by suction nozzles, formed in the surface of the tablet.
- Microswitches are located in the plane of the cleats, and control the exact positioning of the front edge of the plate member against microswitches and cleats. Other cleats hold the element in plate while it is pushed to the front cleats.
- the tablet moves forwards and backwards while being moved by a cam driven by a motor rotating in one direction.
- the cam pushes a pivoting arm provided with a ball joint at its end, the ball being placed in a housing formed under the tablet.
- the tablet comes back with the arm pulled by a spring.
- the cam must always make a full turn to advance the tablet to its maximum forward position, then have this tablet back to its starting position back. Due to the presence of the cam and cleats, the stroke of the back and forth movement of the tablet remains fixed, and entirely dependent on the shape of the cam.
- the format changes, in this case the length of the plate element, require a cam change, which is incompatible with the current requirements to minimize the adjustment times for the profitability of the machine.
- the starting frame corresponding to the rear longitudinal position is lost or is very imprecise, when the plate member is positioned against a starting gauge or when comes against a cleat, because of the flexibility of the laminated lower sheet.
- the positioning of the plate element gripped by the conveyor thus becomes imprecise, making the treatment by the machine imprecise.
- This tablet performs on the one hand a longitudinal movement back and forth, thanks to the crankshaft of the press, and on the other hand correction movements. These movements are around three vertical pins each secured to a carriage, a central carriage sliding in a longitudinal slide and two side carriages sliding in transverse rails.
- the correction movements of this tablet are generated by three specific linear motors controlled by optoelectronic detection means.
- the correction is effected during the drive of the plate member by the movable tablet, so as to bring the front edge of the plate member into a conveyor, in the form of a clip bar at a position of precise reference.
- the temporary fixing of the tablet can then release the plate element and the tablet can be returned to the starting position to take another plate element.
- a main object of the present invention is to develop a device for positioning a plate element in an introductory station of a processing machine of the element.
- a second objective is to provide a positioning device that is particularly simple to implement, to implement and inexpensive.
- a third objective is to equip an introduction station with a device for positioning an element, requiring only a minimum of modifications to operate accurately and quickly.
- Still another objective is to provide a plate element processing machine, allowing the subsequent conveyor to grasp the well aligned element, through an introducer station and a positioning device, and take it into stations to treat it effectively.
- the device is characterized in that the motor has a capacity to move these holding means from this upstream position to different downstream positions, depending on the signal emitted by the detection means, so as to bring this element from the rear positioning to the intermediate position.
- the sheet or sheet element is defined, by way of non-exhaustive example, as being of a material such as paper, cardboard, corrugated cardboard, laminated corrugated cardboard, flexible plastic, for example polyethylene (PE), polyethylene terephthalate (PET), bioriented polypropylene (BOPP), or other polymers, or other materials.
- PE polyethylene
- PET polyethylene terephthalate
- BOPP bioriented polypropylene
- the element undergoes a process of treatment in the processing machine.
- the treatment can be a cutting process.
- the treatment may be a printing process, in which one or more colors have been applied to the surface of the element, to affix graphic signs and / or to give it an aesthetic appearance.
- the treatment can also be a process of crushing, embossing, structuring, hot stamping (also known as hot foil stamping), sticking labels or holograms, or other again.
- This treated element may comprise a layer of varnish, covering all or part of the printed surface.
- the processing machine is defined, by way of non-exhaustive example, as a platen cutting machine, a printing machine, with at least one printing unit, for example in flexography, in heliography, in offset, or embossing group, or a crushing group, or a hot stamping group, a digital or inkjet printing machine, or others.
- the longitudinal direction is defined by referring to the direction of movement of the element in the machine along its median longitudinal axis.
- the upstream and downstream directions are defined with reference to the direction of movement of the element, along the longitudinal direction in the introduction station and in the whole of the processing machine.
- a motor is mechanically connected to the temporary holding means. Not only does this motor move the temporary holding means from upstream to downstream with a plate element and then downstream upstream without a plate element, but it also moves these same temporary upstream holding means downstream with a plate member, while taking into account inaccurate or erroneous rear positioning of the plate member on the temporary holding means.
- An update of an existing positioning device involves disassembly of the front cleats and the use of a motor driven and moving the holding means longitudinally.
- the existing mechanical drive for the positioning device is disconnected from the general drive of the machine and replaced by this motor.
- an introducer station for a plate member processing machine is characterized in that it comprises a device having one or more of the technical features described below and claimed.
- a processing machine of a plate element is characterized in that it comprises an insertion station having one or more technical features described below and claimed.
- a plate-like processing machine here a platen press (1), comprises in the order different treatment stations (2, 3, 4 and 6), an introduction station (2), an cutting station (3), a waste ejection station (4) and a receiving station (6).
- the element in plate that is to say the sheets of cardboard to be cut (7) are grasped and transported through the press (1) by a conveyor.
- the conveyor may generally be constituted by a gripping member, here a series of grippers mounted on a transverse bar of grippers (8), which can be secured to a string of chains (9), shown schematically in dashed lines, driving in the direction longitudinal (arrow L) the leaves to be cut (7).
- the gripper bar (8) grasps the sheet to be cut (7) in a predetermined intermediate position, and the chain train (9) brings them in synchronous succession in the successive treatment stations (2, 3, 4 and 6). ).
- the chain train (9) is transported and periodically stops in a timed run, so that during a transport, each clamp bar (8) with its sheet (7) is passed from an upstream station to the downstream station adjacent.
- the position of the clip bar stops (8) is dictated by a transport of the chain train (9) over a constant distance.
- the cutting station (3) comprises a movable lower bed (11), on which are fixed the cutting counter-form, and a fixed upper bed (12), on the underside of which is fixed the cutting tool , or conversely a fixed lower bed base and a movable upper bed base.
- the cut sheet (13) is separated from the gripper bar (8) at the receiving station (6), the gripper bar (8) still holding the front waste.
- the receiving station (6) is surmounted by a conveyor belt (14) for discharging the front waste from the cut sheets (13).
- the cut sheets (13) are then discharged in a pile out of the press (1).
- the introduction station (2) is provided with a device for positioning the sheet to be cut (15), bringing the sheet to be cut (7) from the insertion station (2) to the cutting station (3).
- the sheets to be cut (7) are arranged in a stack (16), which is supported in particular against a gauge (17).
- the positioning device (15) firstly comprises means for temporarily holding the cutting sheet (7) or introducer (18). With a gap left at the bottom of the gauge (17), the sheets to be cut (7) are removed one by one from the bottom of the stack (16) by means of the introducer (18).
- the introducer (18) moves longitudinally alternately from an upstream position to a downstream position, and vice versa, from a downstream position to an upstream position (arrows A, Aa, Ab and Ac in Figures 2 and 3 ).
- the introducer (18) takes the sheet to cut (7) in a rear position at the bottom of the stack (16) and brings it to the predetermined intermediate position, at the precise location in which the gripper bar (8) is to be grasped.
- the introducer (18) then returns empty to its upstream position.
- the introducer may be in the form of a shelf (18) movable longitudinally (A).
- the shelf (18) can favorably slide longitudinally (A) on two lower longitudinal rails (19), mounted on a frame (21).
- the tablet (18) may have suction ports (22), connected to a vacuum source (not shown), to take the sheets to be cut (7) by their underside.
- Vacuum suction control means are also provided for releasing the sheet to be cut (7) at the precise moment when the gripper bar (8) will grab it.
- the positioning device (15) then comprises a motor (23) moving longitudinally (A) the introducer (18), from the upstream position to the downstream position, and reciprocally, depending on the clocked running of the press (1).
- the motor (23) of the introducer (18) is slaved in position according to the clockwise running of the chain of chains (9) of the press (1), usually marked by the angle of the output shaft of the crankshaft of the press (1).
- the motor (23) has an ability to move (A, Aa, Ab and Ac) said temporary holding means, that is to say the introducer (18), from the upstream position to different downstream positions, as a function of the signal emitted by the detection means, so as to bring the sheet to be cut (7) from the rear position to the intermediate position.
- the positioning device (15) may preferably comprise a drive arm (24).
- a hinge piece (25) provides the mechanical connection between the arm (24) and the introducer (18).
- the arm (24) can mechanically secure the introducer (18) to a drive shaft (26) of the motor (23).
- the positioning device (15) also comprises means for detecting a longitudinal rear positioning (27), in which the sheet to be cut (7) is located, emitting a positioning signal.
- These detection means (27) are located directly downstream of the gauge (17).
- These detection means (27) are of the optoelectronic sensor type. These means (27) can detect either a leading edge of the cutting sheet (7), and / or a pre-printed mark on the upper surface of the cutting sheet (7), and / or a mark imprinted on the lower surface of the cutting sheet (7), the detection means (27) being then arranged under the introducer (18).
- the motor (23) rotates (arrows T, Ta, Tb and Tc in Figures 2 and 3 ) its drive shaft (26) in an angular stroke, which is a function of the cadence of the train of chains (9) of the press (1) and of the signal emitted by the detection means (27) detecting the precise positioning of the the cutting sheet (7).
- the crankshaft of the press (1) drives not only the lower mobile base (11) of the cutting station (3), but also the shaft (26) which moves the introducer ( 18) from upstream to downstream and vice versa.
- the shaft (26) is mechanically disengaged from the main motor of the press (1), and the displacement of the introducer (18) is controlled by a calculation unit (28) at a time as a function of the clockwise running of the press (1) and according to the signal emitted by the detection means (27).
- the drive shaft (26) tilts (T, Ta, Tb and Tc) the arm (24) upstream and downstream and vice versa, so as to move (A, Aa, Ab and Ac) the introducer (18) from the upstream position to different downstream positions to bring the cut sheet (7) of different rear longitudinal positions to a single intermediate position at the clamp bar (8).
- the detection means (27) will send a signal corresponding to the calculation unit (28) which will drive the motor ( 23).
- the arm (24) will be tilted (Ta) and the introducer (18) will be moved (Aa) by the motor (23) in a calculated stroke, so as to cause the sheet to be cut (7a) exact rear positioning towards the precise intermediate positioning.
- the detection means (27) When the sheet to be cut (7b or 7c) is located in a position too far back in the stack (16), the detection means (27) will send a signal corresponding to the calculation unit (28) which will drive the motor (23).
- the arm (24) will be tilted (Tb or Tc) and the introducer (18) will be moved (Ab or Ac) by the motor (23) in a calculated stroke, so as to bring the sheet to be cut (7b or 7c) positioning too far back to the accurate and corrected intermediate positioning at the clamp bar (8).
- the tablet-shaped introducer (18) may have a gripper movably pivotally mounted to temporarily take the sheet to be cut (7) by its leading edge.
- Gripper control means are also provided for releasing the sheet to be cut (7) at the precise moment when the gripper bar (8) will grab it.
- the temporary holding means for the sheets to be cut (7) may be in the form of a vacuum conveyor with endless belts driven by the motor, for example substantially similar to those described in the document EP 0.501.213 .
- These types of temporary holding means comprise a vacuum box whose one face is perforated with numerous suction orifices and which is connected with a vacuum source such as a vacuum suction pump.
- a set of endless conveyor belts or belts are guided and driven by pulleys at the front and back ends of the box and pass along the perforated face of the box to return through the opposite face.
- the driven motor drives one of the end pulleys.
- the sheets to be cut (7) are thus pressed by the suction against the endless belts, then brought to a precise intermediate position, to be seized by the conveyor (8).
- the displacement distance of the sheets to be cut (7) is a function of their initial rear longitudinal positioning, identified by the detection means (27).
- the temporary holding means for the sheets to be cut (7) may be in the form of a vacuum transport with rollers driven by the motor, for example substantially similar to those described in the document EP 0.363.662 .
- These types of temporary holding means comprise a frame consisting of two longitudinal members interconnected by a series of sleepers. These side rails carry in integrated bearings a series of trees, parallel to each other, orthogonal to the direction of movement of the sheets to be cut (7). These trees have a series of driving rollers carved in the mass.
- a plate covers the underside of the frame, except at rectangular openings through which the lower part of the rollers, which thus emerge out of the plate.
- the driven motor drives the shafts and thus the rollers.
- the sheets to be cut (7) are thus pressed by the suction against the rollers, then brought to a precise intermediate position, to be seized by the carrier (8).
- the displacement distance of the sheets to be cut (7) is a function of their initial rear longitudinal positioning, identified by the detection means (27).
- the temporary holding means for the cutting sheets (7) may be in the form of a vacuum conveyor plate and toothed belt driven by the motor.
- These types of temporary holding means comprise at least three gears, arranged in the form of a triangle.
- One or more belts are mounted on these gears being arranged parallel to each other.
- a vacuum plate provided with suction openings is fixed on this or these belts.
- the driven motor drives one of the pinions, the driving pinion, the belt or belts and thus the vacuum plate.
- the sheets to be cut (7) are thus pressed by the suction against the vacuum plate, then brought to a precise intermediate position, to be seized by the conveyor (8).
- the displacement distance of the sheets to be cut (7) is a function of their initial rear longitudinal positioning identified by the detection means (27).
- the temporary holding means for the sheets to be cut (7) may be in the form of a vacuum transport plate and rack-pinion driven by the engine. These types of temporary holding means comprise a rack driven in displacement by a pinion. A vacuum plate provided with suction openings is fixed on this rack.
- the driven motor drives this motor pinion and thus the vacuum plate.
- the sheets to be cut (7) are thus pressed by the suction against the vacuum plate, then brought to a precise intermediate position, to be seized by the conveyor (8).
- the displacement distance of the sheets to be cut (7) is a function of their initial rear longitudinal positioning identified by the detection means (27).
- the temporary holding means for the cutting sheets (7) may be in the form of a vacuum transport plate and electric jack acting as the engine.
- These types of temporary holding means comprise an electric jack consisting of a fixed shaft and a moving part driven in displacement, inserted on the fixed shaft. A vacuum plate provided with suction openings is fixed on this moving part.
- the engine cylinder is driven according to the invention and thus drives the vacuum plate.
- the sheets to be cut (7) are thus pressed by the suction against the vacuum plate, then brought to a precise intermediate position, to be seized by the conveyor (8).
- the displacement distance of the sheets to be cut (7) is a function of their initial rear longitudinal positioning identified by the detection means (27).
- the temporary holding means for the sheets to be cut (7) can be in the form of a vacuum transport plate, cam and electric jack acting as the engine.
- These types of temporary holding means comprise a pivoting arm in reciprocating movement, in a manner analogous to that described for the first embodiment, in first and second variants.
- a vacuum plate with suction openings is attached to the end of this arm.
- a cam control drives the arm.
- an electric jack is inserted between the arm and the cam control.
- the engine cylinder is driven according to the invention and thus drives the vacuum plate.
- the sheets to be cut (7) are thus pressed by the suction against the vacuum plate, then brought to a precise intermediate position, to be seized by the conveyor (8).
- the displacement distance of the sheets to be cut (7) is a function of their initial rear longitudinal positioning identified by the detection means (27).
- the temporary holding means for the sheets to be cut (7) may be in the form of a vacuum transport plate and ball screw acting as the engine.
- These types of temporary holding means comprise a ball screw consisting of a rotary worm and a movable nut driven in displacement, inserted on the worm.
- a vacuum plate with suction openings is attached to the nut.
- the driven motor according to the invention rotates the worm, this nut and thus the vacuum plate.
- the sheets to be cut (7) are thus pressed by the suction against the vacuum plate, then brought to a precise intermediate position, to be seized by the conveyor (8).
- the displacement distance of the sheets to be cut (7) is a function of their initial rear longitudinal positioning identified by the detection means (27).
Description
La présente invention concerne un dispositif de positionnement d'un élément en plaque dans une station d'introduction. L'invention se rapporte à une station d'introduction comprenant un tel dispositif de positionnement d'un élément en plaque. L'invention concerne également une machine de traitement intégrant une telle station d'introduction.The present invention relates to a device for positioning a plate element in an introduction station. The invention relates to an insertion station comprising such a device for positioning a plate element. The invention also relates to a processing machine incorporating such an introduction station.
Une machine de traitement, par exemple une machine de façonnage par découpe à platine, est utilisée notamment dans l'industrie de l'impression et de l'emballage, par exemple pour la confection de boîtes en carton à partir d'éléments en plaque tels que des feuilles.A processing machine, for example a platen cut forming machine, is used in particular in the printing and packaging industry, for example for the manufacture of cardboard boxes from plate elements such as only leaves.
Les éléments en plaque sont retirés d'une pile située en amont de la machine, en étant prises par un introducteur dans une station d'introduction. Ces éléments en plaque sont saisis par un transporteur, se présentant sous la forme de barres de pinces montées à intervalles réguliers sur un train dé chaînes sans fin. Ce dernier permet d'emmener les éléments en plaque dans les différentes stations ultérieures de traitement de la machine. Le train de chaînes se déplace et s'arrête périodiquement dans un défilement cadencé, de sorte que, durant chaque déplacement, toutes les barres de pinces ayant saisi un élément en plaque sont passées d'une station amont à la station aval adjacente qui suit.The plate elements are removed from a stack located upstream of the machine, being taken by an introducer in an introducer station. These plate elements are grasped by a conveyor, in the form of clamp bars mounted at regular intervals on a train of endless chains. The latter makes it possible to take the elements in plate in the different subsequent stations of treatment of the machine. The train of chains moves and stops periodically in a timed run, so that during each move, all gripper bars that have gripped a plate member are moved from an upstream station to the adjacent downstream station that follows.
Dans la machine de découpe, les stations sont successivement une station de découpage des éléments en plaque avec une forme à découper, une station d'éjection des déchets avec une forme d'éjection et une station de réception en pile de ces éléments en plaque découpés.In the cutting machine, the stations are successively a cutting station of the plate elements with a shape to be cut, a waste ejection station with an ejection form and a stack receiving station of these cut sheet elements. .
Pour obtenir une découpe de qualité, le positionnement des éléments en plaque au sein des différentes stations successives est une opération primordiale. Dans le cas du découpage d'un élément en plaque déjà imprimé ou avec un refoulage préalable de lignes de pliage, le positionnement de l'élément en plaque doit être précis pour que les outils de découpe soient en parfait registre avec l'impression ou avec les transformations qui ont été faites au préalable sur l'élément en plaque. En raison de sa construction, le transporteur assure un transport et un arrêt très précis des éléments en plaque aux différentes stations. Ce positionnement dépend donc de la précision du passage de l'élément en plaque, se trouvant libre, à l'élément en plaque, se trouvant saisi par le transporteur, ce passage se faisant dans la station d'introduction.To obtain a quality cut, the positioning of the plate elements within the different successive stations is a primordial operation. In the case of cutting an already printed plate element or with a pre-folding of fold lines, the positioning of the plate element must be precise so that the cutting tools are in perfect register with the printing or with the transformations that have been made beforehand on the plate element. Because of its construction, the carrier ensures very precise transportation and shutdown of plate at different stations. This positioning therefore depends on the accuracy of the passage from the plate element, being free, to the plate element, being grasped by the conveyor, this passage being made in the insertion station.
Pour obtenir un tel positionnement, des dispositifs de positionnement consistent à plaquer l'élément en plaque sur une table de marge ou divers type d'introducteurs contre des butées ou taquets frontaux et latéraux au moyen d'organes d'avancée, tels que des galets ou des bandes. Dans le cas d'éléments en plaque brutes, les taquets frontaux et latéraux utilisés sont disposés de manière précise, par rapport aux stations suivantes. L'élément en plaque est ainsi rapidement taqué par les organes d'avancée, et ensuite saisi par la barre de pinces. Les taquets sont alors escamotés, et la barre de pinces transporte l'élément en plaque dans la station de traitement suivante et le positionne avec précision par rapport aux outils de la platine de cette station.In order to obtain such positioning, positioning devices consist in pressing the plate element on a margin table or various type of introducer against abutments or front and lateral stops by means of advancing members, such as rollers. or bands. In the case of raw plate elements, the front and side cleats used are precisely arranged in relation to the following stations. The plate member is thus quickly tapped by the advancing members, and then grasped by the clip bar. The cleats are then retracted, and the clamp bar carries the plate element in the next processing station and positions it accurately with respect to the tools of the plate of this station.
On connaît d'après le document
Toutefois, ce dispositif de positionnement à taquets implique que l'avance de chaque élément en plaque soit pratiquement arrêtée au moment du taquage et de l'ajustement. Ceci limite sensiblement la cadence possible de défilement des éléments en plaque dans la machine.However, this lug positioning device implies that the advance of each plate member is substantially stopped at the time of jogging and adjustment. This substantially limits the possible rate of scrolling of the plate elements in the machine.
En outre, le fait d'appuyer un élément en plaque contre un taquet entraîne la formation d'une zone plus ou moins abîmée, visible sur le bord correspondant. Cette zone abîmée peut se retrouver ensuite sur la découpe. Cette zone abîmée entraîne des bourrages des éléments en plaque dans la machine.In addition, the fact of pressing a plate member against a cleat causes the formation of a more or less damaged area, visible on the corresponding edge. This damaged area can then be found on the cut. This damaged area causes jams of the plate elements in the machine.
Le document
La tablette se déplace vers l'avant puis vers l'arrière en étant mise en mouvement par une came entraînée par un moteur tournant dans un seul sens. La came pousse un bras pivotant muni d'une rotule à son extrémité, la rotule venant se placer dans un logement ménagé sous la tablette. La tablette revient en arrière avec le bras en étant tirée par un ressort. Lorsque la came fait un tour complet, le bras et ainsi la tablette font alternativement un aller-retour.The tablet moves forwards and backwards while being moved by a cam driven by a motor rotating in one direction. The cam pushes a pivoting arm provided with a ball joint at its end, the ball being placed in a housing formed under the tablet. The tablet comes back with the arm pulled by a spring. When the cam makes a complete turn, the arm and thus the tablet are alternately a round trip.
Cependant, la came doit toujours faire un tour complet pour faire avancer la tablette à sa position maximale en avant, puis faire replacer cette tablette à sa position de départ en arrière. En raison de la présence de la came et des taquets, la course du déplacement en va-et-vient de la tablette reste toujours fixe, et entièrement dépendante de la forme de la came. Les modifications de format, dans ce cas de la longueur de l'élément en plaque, nécessitent un changement de came, ce qui est incompatible avec les exigences actuelles de diminuer au maximum les temps de réglages pour la rentabilité de la machine.However, the cam must always make a full turn to advance the tablet to its maximum forward position, then have this tablet back to its starting position back. Due to the presence of the cam and cleats, the stroke of the back and forth movement of the tablet remains fixed, and entirely dependent on the shape of the cam. The format changes, in this case the length of the plate element, require a cam change, which is incompatible with the current requirements to minimize the adjustment times for the profitability of the machine.
Dans ce document antérieur, il n'est pas possible d'obtenir une variation ou un réglage longitudinal de la position de la tablette et ainsi de l'élément en plaque. En cas de mauvais placement longitudinal de l'élément en plaque, la tablette ne pourra pas effectuer de correction.In this prior document, it is not possible to obtain a variation or a longitudinal adjustment of the position of the tablet and thus of the plate element. In case of bad longitudinal placement of the plate element, the tablet can not make correction.
De plus, aucun moyen n'est prévu ni décrit pour détecter, sans contact, le bord avant de l'élément en plaque. Les éléments en plaque sont de ce fait abimés en raison de leur taquage frontal. Cette situation est d'autant plus accentuée que l'élément devant être traité est un carton ondulé contrecollé. Le bord avant de la feuille inférieure contrecollée vient en porte-à-faux par rapport aux ondulations et à la feuille supérieure. Le taquage d'un tel carton fait que la feuille inférieure s'abîme sur une longueur et/ou se replie vers le haut ou vers le bas ou contre la tranche avant du carton.In addition, no means is provided or described for detecting, without contact, the leading edge of the plate member. The plate elements are therefore damaged because of their frontal jogging. This situation is even more accentuated that the element to be treated is a corrugated cardboard laminated. The front edge of the laminated lower sheet is cantilevered with respect to the corrugations and the topsheet. The jogging of such a carton causes the bottom sheet to become damaged over a length and / or fold up or down or against the front edge of the carton.
En outre, avec un élément en plaque en carton ondulé contrecollé, le référentiel de départ correspondant à la position longitudinale arrière est perdu ou est très imprécis, lorsque l'élément en plaque est positionné contre une jauge de départ ou lorsqu'elle vient contre un taquet, en raison de la souplesse de la feuille inférieure contrecollée. Le positionnement de l'élément en plaque saisi par le transporteur devient ainsi imprécis, rendant imprécis le traitement par la machine.In addition, with a laminated corrugated board member, the starting frame corresponding to the rear longitudinal position is lost or is very imprecise, when the plate member is positioned against a starting gauge or when comes against a cleat, because of the flexibility of the laminated lower sheet. The positioning of the plate element gripped by the conveyor thus becomes imprecise, making the treatment by the machine imprecise.
On connaît également d'après le document
Cette tablette effectue d'une part un déplacement longitudinal d'avant en arrière, grâce au vilebrequin de la presse, et d'autre part des mouvements de correction. Ces mouvements se font autour de trois pivots verticaux solidaires chacun d'un chariot, un chariot central coulissant dans une glissière longitudinale et deux chariots latéraux coulissant dans des glissières transversales. Les mouvements de correction de cette tablette sont générés par trois moteurs linéaires spécifiques commandés par des moyens de détection optoélectroniques.This tablet performs on the one hand a longitudinal movement back and forth, thanks to the crankshaft of the press, and on the other hand correction movements. These movements are around three vertical pins each secured to a carriage, a central carriage sliding in a longitudinal slide and two side carriages sliding in transverse rails. The correction movements of this tablet are generated by three specific linear motors controlled by optoelectronic detection means.
La correction s'effectue pendant l'entraînement de l'élément en plaque par la tablette mobile, de manière à amener le bord avant de l'élément en plaque dans un transporteur, sous la forme d'une barre de pinces en une position de référence précise. La fixation temporaire de la tablette peut alors libérer l'élément en plaque et la tablette peut être ramenée en position de départ pour reprendre un autre élément en plaque. Ce dispositif à positionnement précis en continu de l'élément en plaque en cours de son transport économise le temps nécessaire au taquage des éléments en plaque, ce qui permet d'augmenter sensiblement la cadence de la machine de traitement.The correction is effected during the drive of the plate member by the movable tablet, so as to bring the front edge of the plate member into a conveyor, in the form of a clip bar at a position of precise reference. The temporary fixing of the tablet can then release the plate element and the tablet can be returned to the starting position to take another plate element. This device continuously accurate positioning of the plate element during its transportation saves the time required for jogging plate elements, which allows to significantly increase the rate of the processing machine.
Toutefois, l'augmentation de productivité ainsi obtenue nécessite un investissement important. En effet, l'augmentation de coût entre un système de taquage classique et un tel dispositif de positionnement en continu est considérable et ne se justifie économiquement que sur certains types de machines. Selon le type d'élément en plaque à traiter, l'utilisateur n'a pas forcément besoin d'un dispositif de positionnement aussi efficace et aussi complexe. Le document
Un objectif principal de la présente invention consiste à mettre au point un dispositif de positionnement d'un élément en plaque dans une station d'introduction d'une machine de traitement de l'élément. Un deuxième objectif est de réaliser un dispositif de positionnement qui soit particulièrement simple à réaliser, à mettre en oeuvre et peu coûteux. Un troisième objectif est d'équiper une station d'introduction avec un dispositif pour positionner un élément, ne nécessitant qu'un minimum de modifications pour fonctionner de manière précise et rapide. Un autre objectif encore est celui de prévoir une machine de traitement d'un élément en plaque, permettant au transporteur ultérieur de saisir l'élément bien aligné, grâce à une station d'introduction et un dispositif de positionnement, et de l'emmener dans lès stations pour le traiter efficacement.A main object of the present invention is to develop a device for positioning a plate element in an introductory station of a processing machine of the element. A second objective is to provide a positioning device that is particularly simple to implement, to implement and inexpensive. A third objective is to equip an introduction station with a device for positioning an element, requiring only a minimum of modifications to operate accurately and quickly. Still another objective is to provide a plate element processing machine, allowing the subsequent conveyor to grasp the well aligned element, through an introducer station and a positioning device, and take it into stations to treat it effectively.
L'invention vise un dispositif de positionnement d'un élément en plaque dans une station d'introduction d'une machine de traitement de l'élément. La machine de traitement est équipée avec un transporteur, qui saisit cet élément se trouvant dans un positionnement intermédiaire prédéterminé, et amène cet élément en défilement cadencé dans des stations de traitement successives. Le dispositif est du type comprenant :
- des moyens de maintien temporaires de cet élément, se déplaçant longitudinalement alternativement d'une position amont vers une position aval, et réciproquement, pour prendre cet élément dans un positionnement arrière et l'amener vers le positionnement intermédiaire, et revenir à vide,
- un moteur déplaçant longitudinalement les moyens de maintien, de la position amont vers la position aval, et réciproquement, en fonction du défilement cadencé, et
- des moyens de détection d'un positionnement longitudinal arrière dans lequel se trouve cet élément, émettant un signal de positionnement.
- means for temporarily holding this element, moving longitudinally alternately from an upstream position to a downstream position, and vice versa, to take this element in a rear position and bring it to the intermediate position, and return to empty,
- a motor longitudinally displacing the holding means, from the upstream position to the downstream position, and vice versa, as a function of the clocked running, and
- means for detecting a rear longitudinal position in which this element is located, emitting a positioning signal.
Conformément à un aspect de la présente invention, le dispositif est caractérisé en ce que le moteur présente une capacité à déplacer ces moyens de maintien de cette position amont vers différentes positions aval, en fonction du signal émis par les moyens de détection, de façon à amener cet élément du positionnement arrière vers le positionnement intermédiaire.According to one aspect of the present invention, the device is characterized in that the motor has a capacity to move these holding means from this upstream position to different downstream positions, depending on the signal emitted by the detection means, so as to bring this element from the rear positioning to the intermediate position.
Dans l'ensemble de la description, l'élément en plaque ou en feuille est défini, à titre d'exemple non exhaustif, comme étant en un matériau tel que du papier, du carton plat, du carton ondulé, du carton ondulé contrecollé, du plastique flexible, par exemple du polyéthylène (PE), du polyéthylène téréphtalate (PET), du polypropylène biorienté (BOPP), ou d'autres polymères, ou d'autres matériaux encore.Throughout the description, the sheet or sheet element is defined, by way of non-exhaustive example, as being of a material such as paper, cardboard, corrugated cardboard, laminated corrugated cardboard, flexible plastic, for example polyethylene (PE), polyethylene terephthalate (PET), bioriented polypropylene (BOPP), or other polymers, or other materials.
L'élément subit un processus de traitement dans la machine de traitement. Le traitement peut être un processus de découpage. Le traitement peut être un processus d'impression, au cours duquel une ou plusieurs couleurs ont été appliquées à la surface de l'élément, pour y apposer des signes graphiques et/ou à lui donner un aspect esthétique. Le traitement peut également être un processus de refoulage, de gaufrage, de structuration, d'estampage à chaud (également connu sous la dénomination anglaise de « hot foil stamping »), de collage d'étiquettes ou d'hologrammes, ou d'autres encore. Cet élément traité pourra comprendre une couche de vernis, recouvrant tout ou partie de la surface imprimée.The element undergoes a process of treatment in the processing machine. The treatment can be a cutting process. The treatment may be a printing process, in which one or more colors have been applied to the surface of the element, to affix graphic signs and / or to give it an aesthetic appearance. The treatment can also be a process of crushing, embossing, structuring, hot stamping (also known as hot foil stamping), sticking labels or holograms, or other again. This treated element may comprise a layer of varnish, covering all or part of the printed surface.
La machine de traitement est définie, à titre d'exemple non exhaustif, comme étant une machine de découpe à platine, une machine d'impression, avec au moins un groupe imprimeur, par exemple en flexographie, en héliographie, en offset, ou un groupe de gaufrage, ou un groupe de refoulage, ou un groupe d'estampage à chaud, une machine d'impression numérique ou à jet d'encre, ou d'autres encore.The processing machine is defined, by way of non-exhaustive example, as a platen cutting machine, a printing machine, with at least one printing unit, for example in flexography, in heliography, in offset, or embossing group, or a crushing group, or a hot stamping group, a digital or inkjet printing machine, or others.
La direction longitudinale est définie en faisant référence au sens de déplacement de l'élément dans la machine, selon son axe longitudinal médian. Les sens amont et aval sont définis en faisant référence au sens de déplacement de l'élément, suivant la direction longitudinale dans la station d'introduction et dans l'ensemble de la machine de traitement.The longitudinal direction is defined by referring to the direction of movement of the element in the machine along its median longitudinal axis. The upstream and downstream directions are defined with reference to the direction of movement of the element, along the longitudinal direction in the introduction station and in the whole of the processing machine.
Autrement dit, un moteur est mécaniquement connecté aux moyens de maintien temporaires. Non seulement, ce moteur fait déplacer les moyens de maintien temporaires d'amont en aval avec un élément en plaque puis d'aval en amont à vide sans élément en plaque, mais encore il fait déplacer ces mêmes moyens de maintien temporaires d'amont en aval avec un élément en plaque, tout en tenant compte d'un positionnement arrière imprécis ou erroné de l'élément en plaque se trouvant sur les moyens de maintien temporaires.In other words, a motor is mechanically connected to the temporary holding means. Not only does this motor move the temporary holding means from upstream to downstream with a plate element and then downstream upstream without a plate element, but it also moves these same temporary upstream holding means downstream with a plate member, while taking into account inaccurate or erroneous rear positioning of the plate member on the temporary holding means.
Un positionnement longitudinal est réalisé de manière précise et suffisante, grâce à un seul moteur pour déplacer les moyens de maintien temporaires. Le taquage frontal avec ses taquets est supprimé. Le signal émis par les moyens de détection sert à calculer une position instantanée arrière de l'élément, position qui est ensuite comparée à une position de référence. Ce signal permet ensuite d'amener l'élément du positionnement arrière vers le positionnement intermédiaire choisi.Longitudinal positioning is achieved accurately and sufficiently, thanks to a single motor to move the temporary holding means. Front jogging with cleats is removed. The signal emitted by the detection means is used to calculate an instantaneous rear position of the element, which position is then compared to a reference position. This signal then makes it possible to bring the positioning element back to the chosen intermediate position.
Une mise à jour d'un dispositif de positionnement existant passe par le démontage des taquets frontaux et l'utilisation d'un moteur piloté et déplaçant longitudinalement les moyens de maintien. L'entraînement mécanique existant pour le dispositif de positionnement est déconnecté de l'entraînement général de la machine et remplacé par ce moteur.An update of an existing positioning device involves disassembly of the front cleats and the use of a motor driven and moving the holding means longitudinally. The existing mechanical drive for the positioning device is disconnected from the general drive of the machine and replaced by this motor.
Dans un autre aspect de l'invention, une station d'introduction pour une machine de traitement d'un élément en plaque est caractérisée en ce qu'elle comprend un dispositif présentant une ou plusieurs caractéristiques techniques décrites ci-dessous et revendiquées.In another aspect of the invention, an introducer station for a plate member processing machine is characterized in that it comprises a device having one or more of the technical features described below and claimed.
Selon un autre aspect encore de l'invention, une machine de traitement d'un élément en plaque est caractérisée en ce qu'elle comprend une station d'introduction présentant une ou plusieurs caractéristiques techniques décrites ci-dessous et revendiquées.According to yet another aspect of the invention, a processing machine of a plate element is characterized in that it comprises an insertion station having one or more technical features described below and claimed.
L'invention sera bien comprise et ses divers avantages et différentes caractéristiques ressortiront mieux lors de la description suivante, de l'exemple non limitatif de réalisation, en référence aux dessins schématiques annexés, dans lesquels :
- la
Figure 1 représente une vue latérale synoptique d'une machine de traitement d'un élément ; - la
Figure 2 représente une vue en perspective partielle d'une station d'introduction de la machine de traitement de laFigure 1 , équipée avec un dispositif de positionnement de l'élément selon l'invention ; et - la
Figure 3 représente une vue latérale synoptique du dispositif de positionnement de l'élément de laFigure 2 , dans une position amont et trois positions aval.
- the
Figure 1 represents a synoptic side view of an element processing machine; - the
Figure 2 represents a partial perspective view of an introduction station of the machine for processing theFigure 1 equipped with a device for positioning the element according to the invention; and - the
Figure 3 represents a synoptic side view of the positioning device of the element of theFigure 2 , in an upstream position and three downstream positions.
Comme l'illustre la
Le transporteur peut généralement être constitué par un organe de saisie, ici une série de pinces montées sur une barre transversale de pinces (8), pouvant être solidaire d'un train de chaînes (9), représenté schématiquement en pointillés, entraînant dans le sens longitudinal (Flèche L) les feuilles à découper (7). La barre de pince (8) saisit la feuille à découper (7) se trouvant dans un positionnement intermédiaire prédéterminé, et le train de chaînes (9) les amène en défilement cadencé dans les stations de traitement successives (2, 3, 4 et 6).The conveyor may generally be constituted by a gripping member, here a series of grippers mounted on a transverse bar of grippers (8), which can be secured to a string of chains (9), shown schematically in dashed lines, driving in the direction longitudinal (arrow L) the leaves to be cut (7). The gripper bar (8) grasps the sheet to be cut (7) in a predetermined intermediate position, and the chain train (9) brings them in synchronous succession in the successive treatment stations (2, 3, 4 and 6). ).
Le train de chaînes (9) est transporté et s'arrête périodiquement en un défilement cadencé, de sorte que durant un transport, chaque barre de pinces (8) avec sa feuille (7) est passée d'une station amont à la station aval adjacente. La position des arrêts des barres de pinces (8) est dictée par un transport du train de chaînes (9) sur une distance constante.The chain train (9) is transported and periodically stops in a timed run, so that during a transport, each clamp bar (8) with its sheet (7) is passed from an upstream station to the downstream station adjacent. The position of the clip bar stops (8) is dictated by a transport of the chain train (9) over a constant distance.
Généralement, la station de découpage (3) comprend un sommier inférieur mobile (11), sur lequel sont fixés la contre-forme de découpage, et un sommier supérieur fixe (12), sur la face inférieure duquel est fixé l'outil de découpage, ou inversement un sommier inférieur fixe et un sommier supérieur mobile. La feuille découpée (13) est séparée de la barre de pince (8) au niveau de la station de réception (6), la barre de pince (8) tenant encore le déchet frontal. La station de réception (6) est surmontée d'un tapis roulant (14) destiné à évacuer les déchets frontaux des feuilles découpées (13). Les feuilles découpées (13) sont ensuite évacuées en pile hors de la presse (1).Generally, the cutting station (3) comprises a movable lower bed (11), on which are fixed the cutting counter-form, and a fixed upper bed (12), on the underside of which is fixed the cutting tool , or conversely a fixed lower bed base and a movable upper bed base. The cut sheet (13) is separated from the gripper bar (8) at the receiving station (6), the gripper bar (8) still holding the front waste. The receiving station (6) is surmounted by a conveyor belt (14) for discharging the front waste from the cut sheets (13). The cut sheets (13) are then discharged in a pile out of the press (1).
La station d'introduction (2) est munie d'un dispositif pour positionner la feuille à découper (15), amenant la feuille à découper (7) de la station d'introduction (2) à la station de découpage (3). Dans la station d'introduction (2), les feuilles à découper (7) sont disposées en une pile (16), laquelle prend appui notamment contre une jauge (17). Le dispositif de positionnement (15) comprend tout d'abord des moyens de maintien temporaires de la feuille à découper (7) ou introducteur (18). Grâce à un intervalle laissé au bas de la jauge (17), les feuilles à découper (7) sont retirées une à une du bas de la pile (16) au moyen de l'introducteur (18).The introduction station (2) is provided with a device for positioning the sheet to be cut (15), bringing the sheet to be cut (7) from the insertion station (2) to the cutting station (3). In the introduction station (2), the sheets to be cut (7) are arranged in a stack (16), which is supported in particular against a gauge (17). The positioning device (15) firstly comprises means for temporarily holding the cutting sheet (7) or introducer (18). With a gap left at the bottom of the gauge (17), the sheets to be cut (7) are removed one by one from the bottom of the stack (16) by means of the introducer (18).
L'introducteur (18) se déplace longitudinalement alternativement d'une position amont vers une position aval, et réciproquement, d'une position aval vers une position amont (Flèches A, Aa, Ab et Ac en
Dans une première forme de réalisation et de manière avantageuse, l'introducteur peut être sous la forme d'une tablette (18) mobile longitudinalement (A). La tablette (18) peut favorablement coulisser longitudinalement (A) sur deux glissières longitudinales inférieures (19), montées sur un bâti (21).In a first embodiment and advantageously, the introducer may be in the form of a shelf (18) movable longitudinally (A). The shelf (18) can favorably slide longitudinally (A) on two lower longitudinal rails (19), mounted on a frame (21).
Dans une première variante de la première forme de réalisation, la tablette (18) peut posséder des orifices d'aspiration (22), connectés à une source vacuum (non représentée), pour prendre les feuilles à découper (7) par leur face inférieure. Des moyens de commande de l'aspiration vacuum sont également prévus pour relâcher la feuille à découper (7) au moment précis où la barre de pince (8) va la saisir.In a first variant of the first embodiment, the tablet (18) may have suction ports (22), connected to a vacuum source (not shown), to take the sheets to be cut (7) by their underside. . Vacuum suction control means are also provided for releasing the sheet to be cut (7) at the precise moment when the gripper bar (8) will grab it.
Le dispositif de positionnement (15) comprend ensuite un moteur (23) déplaçant longitudinalement (A) l'introducteur (18), de la position amont vers la position aval, et réciproquement, en fonction du défilement cadencé de la presse (1). Le moteur (23) de l'introducteur (18) est asservi en position selon le défilement cadencé du train de chaînes (9) de la presse (1), usuellement repéré par l'angle de l'arbre de sortie du vilebrequin de la presse (1).The positioning device (15) then comprises a motor (23) moving longitudinally (A) the introducer (18), from the upstream position to the downstream position, and reciprocally, depending on the clocked running of the press (1). The motor (23) of the introducer (18) is slaved in position according to the clockwise running of the chain of chains (9) of the press (1), usually marked by the angle of the output shaft of the crankshaft of the press (1).
Selon l'invention, le moteur (23) présente une capacité à déplacer (A, Aa, Ab et Ac) lesdits moyens de maintien temporaires, c'est-à-dire l'introducteur (18), de la position amont vers différentes positions aval, en fonction du signal émis par les moyens de détection, de façon à amener la feuille à découper (7) du positionnement arrière vers le positionnement intermédiaire.According to the invention, the motor (23) has an ability to move (A, Aa, Ab and Ac) said temporary holding means, that is to say the introducer (18), from the upstream position to different downstream positions, as a function of the signal emitted by the detection means, so as to bring the sheet to be cut (7) from the rear position to the intermediate position.
Le dispositif de positionnement (15) peut préférentiellement comprendre un bras d'entraînement (24). Une pièce d'articulation (25) assure la liaison mécanique entre le bras (24) et l'introducteur (18). Le bras (24) peut mécaniquement solidariser l'introducteur (18) à un arbre d'entraînement (26) du moteur (23).The positioning device (15) may preferably comprise a drive arm (24). A hinge piece (25) provides the mechanical connection between the arm (24) and the introducer (18). The arm (24) can mechanically secure the introducer (18) to a drive shaft (26) of the motor (23).
Le dispositif de positionnement (15) comprend également des moyens de détection d'un positionnement longitudinal arrière (27), dans lequel se trouve la feuille à découper (7), émettant un signal de positionnement. Ces moyens de détection (27) sont situés directement en aval de la jauge (17). Ces moyens de détection (27) sont de type capteur optoélectronique. Ces moyens (27) peuvent détecter soit un bord avant de la feuille à découper (7), et/ou une marque imprimée au préalable sur la surface supérieure de la feuille à découper (7), et/ou une marque imprimée au préalable sur la surface inférieure de la feuille à découper (7), les moyens de détection (27) étant alors disposés sous l'introducteur (18).The positioning device (15) also comprises means for detecting a longitudinal rear positioning (27), in which the sheet to be cut (7) is located, emitting a positioning signal. These detection means (27) are located directly downstream of the gauge (17). These detection means (27) are of the optoelectronic sensor type. These means (27) can detect either a leading edge of the cutting sheet (7), and / or a pre-printed mark on the upper surface of the cutting sheet (7), and / or a mark imprinted on the lower surface of the cutting sheet (7), the detection means (27) being then arranged under the introducer (18).
Le moteur (23) fait pivoter (Flèches T, Ta, Tb et Tc en
Dans l'état de la technique, le vilebrequin de la presse (1) entraîne non seulement le sommier mobile inférieur (11) de la station de découpage (3), mais également l'arbre (26) qui fait déplacer l'introducteur (18) d'amont en aval et inversement. Dans l'invention, l'arbre (26) est mécaniquement désolidarisé du moteur principal de la presse (1), et le déplacement de l'introducteur (18) est piloté par une unité de calcul (28) à la fois en fonction du défilement cadencé de la presse (1) et en fonction du signal émis par les moyens de détection (27).In the state of the art, the crankshaft of the press (1) drives not only the lower mobile base (11) of the cutting station (3), but also the shaft (26) which moves the introducer ( 18) from upstream to downstream and vice versa. In the invention, the shaft (26) is mechanically disengaged from the main motor of the press (1), and the displacement of the introducer (18) is controlled by a calculation unit (28) at a time as a function of the clockwise running of the press (1) and according to the signal emitted by the detection means (27).
L'arbre d'entraînement (26) fait basculer (T, Ta, Tb et Tc) le bras (24) d'amont en aval et réciproquement, de façon à faire déplacer (A, Aa, Ab et Ac) l'introducteur (18) de la position amont vers différentes positions aval pour amener la feuille à découper (7) de différents positionnements longitudinaux arrière vers un seul positionnement intermédiaire au niveau de la barre de pince (8).The drive shaft (26) tilts (T, Ta, Tb and Tc) the arm (24) upstream and downstream and vice versa, so as to move (A, Aa, Ab and Ac) the introducer (18) from the upstream position to different downstream positions to bring the cut sheet (7) of different rear longitudinal positions to a single intermediate position at the clamp bar (8).
Comme le montre la
Lorsque la feuille à découper (7b ou 7c) est située dans un positionnement trop en arrière dans la pile (16), les moyens de détection (27) vont envoyer un signal correspondant à l'unité de calcul (28) qui va piloter le moteur (23). Le bras (24) va être basculé (Tb ou Tc) et l'introducteur (18) va être déplacé (Ab ou Ac) par le moteur (23) selon une course calculée, de façon à amener la feuille à découper (7b ou 7c) du positionnement trop en arrière vers le positionnement intermédiaire précis et corrigé au niveau de la barre de pince (8).When the sheet to be cut (7b or 7c) is located in a position too far back in the stack (16), the detection means (27) will send a signal corresponding to the calculation unit (28) which will drive the motor (23). The arm (24) will be tilted (Tb or Tc) and the introducer (18) will be moved (Ab or Ac) by the motor (23) in a calculated stroke, so as to bring the sheet to be cut (7b or 7c) positioning too far back to the accurate and corrected intermediate positioning at the clamp bar (8).
Dans une deuxième variante de la première forme de réalisation, l'introducteur sous forme de tablette (18) peut posséder une pince de saisie, montée mobile en pivotement, pour prendre temporairement la feuille à découper (7) par son bord avant. Des moyens de commande de la pince sont également prévus pour relâcher la feuille à découper (7) au moment précis où la barre de pince (8) va la saisir.In a second variant of the first embodiment, the tablet-shaped introducer (18) may have a gripper movably pivotally mounted to temporarily take the sheet to be cut (7) by its leading edge. Gripper control means are also provided for releasing the sheet to be cut (7) at the precise moment when the gripper bar (8) will grab it.
Dans une deuxième forme de réalisation, les moyens de maintien temporaires pour les feuilles à découper (7) peuvent être sous la forme d'un transport vacuum à courroies sans fin entraînées par le moteur, par exemple sensiblement analogues à ceux décrits dans le document
Le moteur piloté selon l'invention entraîne l'une des poulies d'extrémité. Les feuilles à découper (7) sont ainsi plaquées par l'aspiration contre les courroies sans fin, puis amenées au niveau d'un positionnement intermédiaire précis, pour y être saisies par le transporteur (8). La distance de déplacement des feuilles à découper (7) est fonction de leur positionnement longitudinal arrière de départ, repéré par les moyens de détection (27).The driven motor according to the invention drives one of the end pulleys. The sheets to be cut (7) are thus pressed by the suction against the endless belts, then brought to a precise intermediate position, to be seized by the conveyor (8). The displacement distance of the sheets to be cut (7) is a function of their initial rear longitudinal positioning, identified by the detection means (27).
Dans une troisième forme de réalisation, les moyens de maintien temporaires pour les feuilles à découper (7) peuvent être sous la forme d'un transport vacuum à rouleaux entraînés par le moteur, par exemple sensiblement analogues à ceux décrits dans le document
Le moteur piloté selon l'invention entraîne les arbres et ainsi les rouleaux. Les feuilles à découper (7) sont ainsi plaquées par l'aspiration contre les rouleaux, puis amenées au niveau d'un positionnement intermédiaire précis, pour y être saisies par le transporteur (8). La distance de déplacement des feuilles à découper (7) est fonction de leur positionnement longitudinal arrière de départ, repéré par les moyens de détection (27).The driven motor according to the invention drives the shafts and thus the rollers. The sheets to be cut (7) are thus pressed by the suction against the rollers, then brought to a precise intermediate position, to be seized by the carrier (8). The displacement distance of the sheets to be cut (7) is a function of their initial rear longitudinal positioning, identified by the detection means (27).
Dans une quatrième forme de réalisation, les moyens de maintien temporaires pour les feuilles à découper (7) peuvent être sous la forme d'un transport vacuum à plaque et courroie crantée entraînée par le moteur. Ces types de moyens de maintien temporaires comprennent au moins trois pignons, disposés en forme de triangle. Une ou plusieurs courroies sont montées sur ces pignons en étant disposées parallèlement les unes par rapport aux autres. Une plaque vacuum munie d'ouvertures d'aspiration est fixée sur cette ou ces courroies.In a fourth embodiment, the temporary holding means for the cutting sheets (7) may be in the form of a vacuum conveyor plate and toothed belt driven by the motor. These types of temporary holding means comprise at least three gears, arranged in the form of a triangle. One or more belts are mounted on these gears being arranged parallel to each other. A vacuum plate provided with suction openings is fixed on this or these belts.
Le moteur piloté selon l'invention entraîne l'un des pignons, le pignon moteur, la ou les courroies et ainsi la plaque vacuum. Les feuilles à découper (7) sont ainsi plaquées par l'aspiration contre la plaque vacuum, puis amenées au niveau d'un positionnement intermédiaire précis, pour y être saisies par le transporteur (8). La distance de déplacement des feuilles à découper (7) est fonction de leur positionnement longitudinal arrière de départ repéré par les moyens de détection (27).The driven motor according to the invention drives one of the pinions, the driving pinion, the belt or belts and thus the vacuum plate. The sheets to be cut (7) are thus pressed by the suction against the vacuum plate, then brought to a precise intermediate position, to be seized by the conveyor (8). The displacement distance of the sheets to be cut (7) is a function of their initial rear longitudinal positioning identified by the detection means (27).
Dans une cinquième forme de réalisation, les moyens de maintien temporaires pour les feuilles à découper (7) peuvent être sous la forme d'un transport vacuum à plaque et crémaillère-pignon entraîné par le moteur. Ces types de moyens de maintien temporaires comprennent une crémaillère entraînée en déplacement par un pignon. Une plaque vacuum munie d'ouvertures d'aspiration est fixée sur cette crémaillère.In a fifth embodiment, the temporary holding means for the sheets to be cut (7) may be in the form of a vacuum transport plate and rack-pinion driven by the engine. These types of temporary holding means comprise a rack driven in displacement by a pinion. A vacuum plate provided with suction openings is fixed on this rack.
Le moteur piloté selon l'invention entraîne ce pignon moteur et ainsi la plaque vacuum. Les feuilles à découper (7) sont ainsi plaquées par l'aspiration contre la plaque vacuum, puis amenées au niveau d'un positionnement intermédiaire précis, pour y être saisies par le transporteur (8). La distance de déplacement des feuilles à découper (7) est fonction de leur positionnement longitudinal arrière de départ repéré par les moyens de détection (27).The driven motor according to the invention drives this motor pinion and thus the vacuum plate. The sheets to be cut (7) are thus pressed by the suction against the vacuum plate, then brought to a precise intermediate position, to be seized by the conveyor (8). The displacement distance of the sheets to be cut (7) is a function of their initial rear longitudinal positioning identified by the detection means (27).
Dans une sixième forme de réalisation, les moyens de maintien temporaires pour les feuilles à découper (7) peuvent être sous la forme d'un transport vacuum à plaque et vérin électrique jouant le rôle du moteur. Ces types de moyens de maintien temporaires comprennent un vérin électrique constitué d'un arbre fixe et d'une partie mobile entraînée en déplacement, insérée sur l'arbre fixe. Une plaque vacuum munie d'ouvertures d'aspiration est fixée sur cette partie mobile.In a sixth embodiment, the temporary holding means for the cutting sheets (7) may be in the form of a vacuum transport plate and electric jack acting as the engine. These types of temporary holding means comprise an electric jack consisting of a fixed shaft and a moving part driven in displacement, inserted on the fixed shaft. A vacuum plate provided with suction openings is fixed on this moving part.
Le vérin moteur est piloté selon l'invention et entraîne ainsi la plaque vacuum. Les feuilles à découper (7) sont ainsi plaquées par l'aspiration contre la plaque vacuum, puis amenées au niveau d'un positionnement intermédiaire précis, pour y être saisies par le transporteur (8). La distance de déplacement des feuilles à découper (7) est fonction de leur positionnement longitudinal arrière de départ repéré par les moyens de détection (27).The engine cylinder is driven according to the invention and thus drives the vacuum plate. The sheets to be cut (7) are thus pressed by the suction against the vacuum plate, then brought to a precise intermediate position, to be seized by the conveyor (8). The displacement distance of the sheets to be cut (7) is a function of their initial rear longitudinal positioning identified by the detection means (27).
Dans une septième forme de réalisation, les moyens de maintien temporaires pour les feuilles à découper (7) peuvent être sous la forme d'un transport vacuum à plaque, came et vérin électrique jouant le rôle du moteur. Ces types de moyens de maintien temporaires comprennent un bras pivotant en déplacement de va-et-vient, de manière analogue à ce qui a été décrit pour la première forme de réalisation, en première et deuxième variante. Une plaque vacuum munie d'ouvertures d'aspiration est fixée à l'extrémité de ce bras. Une commande à came entraîne le bras. De plus, un vérin électrique est inséré entre le bras et la commande à came.In a seventh embodiment, the temporary holding means for the sheets to be cut (7) can be in the form of a vacuum transport plate, cam and electric jack acting as the engine. These types of temporary holding means comprise a pivoting arm in reciprocating movement, in a manner analogous to that described for the first embodiment, in first and second variants. A vacuum plate with suction openings is attached to the end of this arm. A cam control drives the arm. In addition, an electric jack is inserted between the arm and the cam control.
Lorsque la came fait un tour complet, le bras et ainsi la tablette font un va-et-vient selon le défilement cadencé. Le vérin moteur est piloté selon l'invention et entraîne ainsi la plaque vacuum. Les feuilles à découper (7) sont ainsi plaquées par l'aspiration contre la plaque vacuum, puis amenées au niveau d'un positionnement intermédiaire précis, pour y être saisies par le transporteur (8). La distance de déplacement des feuilles à découper (7) est fonction de leur positionnement longitudinal arrière de départ repéré par les moyens de détection (27).When the cam makes a complete turn, the arm and thus the tablet back and forth according to the timed scrolling. The engine cylinder is driven according to the invention and thus drives the vacuum plate. The sheets to be cut (7) are thus pressed by the suction against the vacuum plate, then brought to a precise intermediate position, to be seized by the conveyor (8). The displacement distance of the sheets to be cut (7) is a function of their initial rear longitudinal positioning identified by the detection means (27).
Dans une huitième forme de réalisation, les moyens de maintien temporaires pour les feuilles à découper (7) peuvent être sous la forme d'un transport vacuum à plaque et vis à bille jouant le rôle du moteur. Ces types de moyens de maintien temporaires comprennent une vis à bille constituée d'une vis sans fin rotative et d'un écrou mobile entraîné en déplacement, inséré sur la vis sans fin. Une plaque vacuum munie d'ouvertures d'aspiration est fixée sur l'écrou.In an eighth embodiment, the temporary holding means for the sheets to be cut (7) may be in the form of a vacuum transport plate and ball screw acting as the engine. These types of temporary holding means comprise a ball screw consisting of a rotary worm and a movable nut driven in displacement, inserted on the worm. A vacuum plate with suction openings is attached to the nut.
Le moteur piloté selon l'invention entraîne en rotation la vis sans fin, cet écrou et ainsi la plaque vacuum. Les feuilles à découper (7) sont ainsi plaquées par l'aspiration contre la plaque vacuum, puis amenées au niveau d'un positionnement intermédiaire précis, pour y être saisies par le transporteur (8). La distance de déplacement des feuilles à découper (7) est fonction de leur positionnement longitudinal arrière de départ repéré par les moyens de détection (27).The driven motor according to the invention rotates the worm, this nut and thus the vacuum plate. The sheets to be cut (7) are thus pressed by the suction against the vacuum plate, then brought to a precise intermediate position, to be seized by the conveyor (8). The displacement distance of the sheets to be cut (7) is a function of their initial rear longitudinal positioning identified by the detection means (27).
La présente invention n'est pas limitée aux modes de réalisation décrits et illustrés. De nombreuses modifications peuvent être réalisées, sans pour autant sortir du cadre défini par la portée du jeu de revendications.The present invention is not limited to the embodiments described and illustrated. Many modifications can be made, without departing from the scope defined by the scope of the set of claims.
Claims (11)
- Device for positioning a plate element (7) in an infeed station (2) of a machine for treating the element (1), fitted with a conveyor (8, 9), gripping said element (7) found in a predetermined intermediate position, and carrying said element (7) in a rated running into successive processing stations (3, 4, 6), of the type comprising:- means (18) for temporarily holding said element (7), moving longitudinally alternatively (A) from an upstream position to a downstream position, and vice-versa, to pick up said element (7) in a rear position and bring it to the intermediate position, and to return empty,- a motor (23) moving longitudinally the holding means (18), from the upstream position to the downstream position, and vice-versa, as a function of the rated running, and- means (27) for detecting a rear longitudinal position in which said element (7, 7a, 7b, 7c) is found, emitting a position signal,characterized in that the motor (23) is able to move (A, Aa, Ab, Ac) said holding means (18) from said upstream position to various downstream positions, as a function of the signal emitted by the detection means (27), so as to bring said element (7, 7a, 7b, 7c) from the rear position to the intermediate position.
- Device according to Claim 1, characterized in that the holding means are in the form of a shelf (18) that can move longitudinally.
- Device according to Claim 1 or 2, characterized in that it comprises a drive arm (24) mechanically securing the holding means (18) to a drive shaft (26) of the motor (23).
- Device according to Claim 2 or 3, characterized in that the shelf (18) slides longitudinally on two lower longitudinal slides (19).
- Device according to any one of Claims 2 to 4, characterized in that the shelf (18) has suction holes (22) connected to a vacuum source, to pick up the element (7, 7a, 7b, 7c).
- Device according to any one of Claims 2 to 4, characterized in that the shelf has a gripping gripper, pivotably mounted to pick up the element (7, 7a, 7b, 7c) by its front edge.
- Device according to Claim 1, characterized in that the holding means are in the form of a vacuum conveyor with endless belts driven by the motor (23).
- Device according to Claim 1, characterized in that the holding means are in the form of a vacuum conveyor with rollers driven by the motor (23).
- Device according to any one of the preceding claims, characterized in that the conveyor comprises a series of grippers mounted on a transverse bar (8) secured to lateral chains (9).
- Infeed station for a machine (1) for treating a plate element (7, 7a, 7b, 7c), characterized in that it comprises a device (15) according to any one of the preceding claims.
- Machine for treating a plate element (7, 7a, 7b, 7c), characterized in that it comprises an infeed station (2) according to Claim 10.
Priority Applications (1)
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EP10700708.0A EP2391566B1 (en) | 2009-02-02 | 2010-01-14 | Device for positioning a flat element in an entrance station of a processing machine |
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EP09001392 | 2009-02-02 | ||
EP10700708.0A EP2391566B1 (en) | 2009-02-02 | 2010-01-14 | Device for positioning a flat element in an entrance station of a processing machine |
PCT/EP2010/000170 WO2010086087A1 (en) | 2009-02-02 | 2010-01-14 | Device for positioning a plate element in an insertion station of a processing machine |
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EP2391566A1 EP2391566A1 (en) | 2011-12-07 |
EP2391566B1 true EP2391566B1 (en) | 2015-01-07 |
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- 2010-01-14 US US13/145,384 patent/US8727346B2/en active Active
- 2010-01-14 KR KR1020117020557A patent/KR101299908B1/en active IP Right Grant
- 2010-01-14 ES ES10700708.0T patent/ES2528940T3/en active Active
- 2010-01-14 WO PCT/EP2010/000170 patent/WO2010086087A1/en active Application Filing
- 2010-01-22 TW TW099101738A patent/TWI486299B/en active
Also Published As
Publication number | Publication date |
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KR101299908B1 (en) | 2013-08-23 |
EP2391566A1 (en) | 2011-12-07 |
WO2010086087A1 (en) | 2010-08-05 |
JP5364174B2 (en) | 2013-12-11 |
ES2528940T3 (en) | 2015-02-13 |
US20110286820A1 (en) | 2011-11-24 |
TWI486299B (en) | 2015-06-01 |
KR20110112469A (en) | 2011-10-12 |
CN102300794A (en) | 2011-12-28 |
CN102300794B (en) | 2015-05-20 |
TW201029909A (en) | 2010-08-16 |
JP2012516275A (en) | 2012-07-19 |
US8727346B2 (en) | 2014-05-20 |
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