WO2018069647A2 - Method and device for removing a blank from a stack - Google Patents
Method and device for removing a blank from a stack Download PDFInfo
- Publication number
- WO2018069647A2 WO2018069647A2 PCT/FR2017/052800 FR2017052800W WO2018069647A2 WO 2018069647 A2 WO2018069647 A2 WO 2018069647A2 FR 2017052800 W FR2017052800 W FR 2017052800W WO 2018069647 A2 WO2018069647 A2 WO 2018069647A2
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- WIPO (PCT)
- Prior art keywords
- blank
- flaps
- station
- box
- support
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
- B31B50/60—Uniting opposed surfaces or edges; Taping
- B31B50/62—Uniting opposed surfaces or edges; Taping by adhesives
- B31B50/624—Applying glue on blanks
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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
- B65H3/00—Separating articles from piles
- B65H3/08—Separating articles from piles using pneumatic force
- B65H3/0808—Suction grippers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B2100/00—Rigid or semi-rigid containers made by folding single-piece sheets, blanks or webs
- B31B2100/002—Rigid or semi-rigid containers made by folding single-piece sheets, blanks or webs characterised by the shape of the blank from which they are formed
- B31B2100/0022—Rigid or semi-rigid containers made by folding single-piece sheets, blanks or webs characterised by the shape of the blank from which they are formed made from tubular webs or blanks, including by tube or bottom forming operations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B2110/00—Shape of rigid or semi-rigid containers
- B31B2110/30—Shape of rigid or semi-rigid containers having a polygonal cross section
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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
- B65H2403/00—Power transmission; Driving means
- B65H2403/50—Driving mechanisms
- B65H2403/53—Articulated mechanisms
- B65H2403/531—Planar mechanisms
- B65H2403/5311—Parallelogram mechanisms
Definitions
- the present invention relates to a method of unstacking a blank of sheet material to be transferred, after sizing, to a forming station around a mandrel, to obtain a box or portion of box polygonal section.
- It also relates to a device for unstacking a blank of sheet material.
- This blank conventionally comprises a sequence of at least three parts, namely two extreme flaps located on either side of at least one intermediate flap, said flaps being connected to each other by parallel fold lines and provided with lateral flaps, respectively connected to said flaps by fold lines perpendicular to the fold lines connecting said flaps, the free edge of one of the end flaps being provided with a tongue connected to said end flap by a fold line parallel to the fold lines connecting said shutters.
- the blank has three flaps, it allows to obtain a part of a box (cover or bottom). When it has at least four parts, it makes it possible to obtain a box.
- This invention finds a particularly important, although not exclusive, application in the field of reinforced corrugated boxes.
- the blanks are typically stored in a store in the form of a stack.
- Various means can be provided for removing a blank from the storage magazine to lay it flat in the removal area of a sizing station.
- an adhesive is deposited on one side, on two side flaps and on the other hand, on the tongue of an end flap or near the free edge of the end flap opposite said tongue.
- the document EP 0 334 707 describes means for gripping by suction of the upper blank of a stack of blanks laid horizontally. These means are movable vertically and in the direction of transfer of the blanks in the machine. They thus make it possible to take successively the blanks of the stack to deposit them on a table.
- Klik Klok an unfolding device comprising a bar provided with a plurality of suction cups and pivotally mounted about an axis of rotation. This bar is supported by a fork having two articulated arms, each of them being attached to one end of the bar.
- This device has the advantage of reducing strokes and therefore allow faster rates, up to 120 blanks per minute. However, it has many disadvantages.
- the fork has a length greater than that of the blank of larger dimensions. Because of its size, it necessarily extends to the longitudinal edges of the machine.
- the design of the device requires a relatively large height differential between the bottom of the store and the removal area of the sizing station.
- the standards in force define the maximum limit at which an operator must lift a load.
- the object of the invention is to overcome these drawbacks by proposing a method and a device for unfolding a blank of sheet material making it possible to carry out unstacking with precision and by ensuring greater safety and good ergonomics for the personnel present, while allowing fast rates.
- the invention relates to a device for unstacking a blank of sheet material from a magazine in which the blanks are arranged in a stack, said device comprising means suction extraction of the blank of said stack and a single system of articulated arms, for rotating each blank extracted from the feed station and lay flat.
- one or more of the following provisions are also and / or in addition:
- the articulated arm system carries a bar provided with extraction extraction means, this bar extending in a transverse direction;
- the articulated arm system comprises at least one main arm rotatably mounted about a fixed axis relative to the frame, a secondary arm rotatably mounted around the main arm and around a support of said bar and a rod mounted in rotation on the main arm and on said support.
- the invention also relates to a method of unstacking a blank of sheet material from a feed station and being intended to be transferred, after unstacking and deposited on the support of a sizing station, to a station for forming a box or part of a box with a polygonal section, implemented with the device according to the invention, in which the blank is extracted by suction of a stack of blanks arranged inclined with respect to said support of gluing station, moved in rotation and released at the sizing station to be positioned flat on said support, support with which it is in contact with its underside.
- the extraction of said blank is carried out along a semi-linear trajectory.
- the invention also relates to a method of forming a box or box portion with a polygonal section from a blank of sheet material having a sequence of at least three flaps, namely two extreme flaps located from on either side of at least one intermediate flap, said flaps being connected to each other by parallel fold lines and provided with lateral flaps, respectively connected to said flaps by fold lines perpendicular to the fold lines connecting said flaps , the free edge of one of the end flaps of said flap assembly being provided with a tongue connected to said end flap by a folding line parallel to the fold lines connecting said flaps, in which process, in a forming station, is formed the flank by winding the flaps around a mandrel with a polygonal section whose external cross-section corresponds to the internal cross-section of the box or the part box to obtain, characterized in that the flank is previously depilated in an unstacking station, implementing the unstacking process according to the invention.
- the document EP 0 334 707 describes a method of successively taking the blanks in a store and the place on a table equipped with training fingers. They slide the blank on the table to bring it under the mandrel. During the transfer to the mandrel, the blank encounters gluing devices arranged above and below the table which deposit lines of adhesive on the blank, at the level of two lateral flaps and the tongue of an end flap or at a proximity of the free edge of the end flap opposite to the tongue.
- the adhesive intended to be deposited from below on the underside of the blank, at the level of the flaps, can lead to the frame of the machine, which is detrimental both to the final bonding of the box and to the maintenance of the machine.
- the invention therefore also aims to overcome these disadvantages by providing a method and a box forming machine for performing the removal of adhesive with high accuracy, while being a design and / or a simplified implementation. Therefore, in advantageous embodiments, one or more of the following provisions are also and / or in addition:
- an adhesive being deposited on the one hand, on two lateral flaps and on the other hand, on said tongue of an end flap or near the free edge of the end flap opposite said tongue and the blank being positioned flat on a support of a sizing station, support with which it is in contact with its lower face, the deposition of the adhesive is formed on the upper face of said at least two side flaps and said tab or the opposite flap opposite said tongue.
- the deposition of the adhesive is carried out by means of at least one nozzle associated with displacement means;
- the means for moving said at least one nozzle comprise at least one articulated arm
- the deposition of the adhesive on said flaps is carried out while the blank is immobile and said at least one nozzle in motion, thanks to said moving means;
- the invention also relates to a method for the automatic successive forming of boxes or parts of a box embodying a method of forming a box or part of a box according to the invention, characterized in that the blank n is forming of the blank n - 1.
- the invention also relates to a machine for forming a box or box portion with a polygonal section comprising a magazine in which the blanks are arranged in a stack, and a storage-unstacking station with an unstacking device according to the invention.
- a sizing station with a support for said blank and a forming station in which is formed the winding of the blank around a mandrel.
- one or more of the following provisions are also and / or in addition:
- the blanks are arranged inclined with respect to the support of the gluing station
- the gluing station also includes
- At least one nozzle capable of delivering an adhesive, positioned above the support and associated with displacement means and
- the sizing station comprises means for setting the blank on said support in a reference position
- the blank is moved from the gluing station to the forming station by a system of articulated arms, located under the support;
- the articulated arm system is associated with means for securing the blank, in particular by suction.
- FIG. 1 shows in plan view an embodiment of a blank that can be used with the method and the sizing device according to the invention.
- Figure 2 is a perspective view of a polygonal section box forming machine, from the blank shown in Figure 1, including a sizing device according to the invention.
- Figure 3 is a side view in longitudinal section of the machine shown in Figure 2, more precisely on the right side of the machine in the direction of routing of the blanks.
- Figures 4 and 5 are top views of the machine shown in Figure 2, Figure 5 differing from Figure 4 in that it also shows blanks being processed on the machine.
- Figure 6 is a perspective view illustrating the unstacking device blanks from a store.
- Figures 7A-7F are side views of the unfolding device, illustrating the various steps leading a blank from the feed magazine to its establishment at the sizing station.
- Fig. 8 is a perspective view illustrating means for delivering an adhesive.
- FIGS 9A to 9D illustrate the different steps of adhesive removal on the blank.
- Figure 10 is a perspective view of the blank moving means from the sizing station to the forming station.
- FIGS. 11A to 11D illustrate the different steps of moving the blank from the sizing station to the forming station.
- FIG. 1 shows a blank 1 of double-sided corrugated cardboard, for example of low grammage ( ⁇ 250 g / m 2) for example of thickness 3 mm intended to form a box.
- It comprises a sequence 2 of four rectangular main flaps 3, 4, 5, 6 terminated by a gluing tab 7 and interconnected by first fold lines parallel to one another, namely a first central or reference fold line. 8, first two lines of folding 9 and 10, and a first end fold line 11, junction with the tongue 7.
- the shutters 3 and 6 are called extreme shutters and the shutters 4 and 5, intermediate shutters.
- the blank comprises, in a manner known per se, a first set 12 of rectangular or substantially rectangular flaps 13 connected to the main flaps by second fold lines 14 perpendicular to the first and adapted to form the top of the box after filling and a second set 15 flaps 16a to 16d rectangular or substantially rectangular also connected to the main flaps by second fold lines 14 and fit to form the bottom of the box.
- the method and the device according to the invention can also use variants of the blank illustrated in FIG. 1 and in particular a blank comprising rectangular main shutters interconnected by rectangular secondary shutters.
- FIGS. 2 to 5 describe a machine for forming a box with a polygonal section from the blank shown in FIG. 1, this machine comprising an unstacking device according to the embodiment of the invention. 'invention more particularly described here, especially with reference to the other figures.
- This machine 20 comprises a frame or structure 21 forming a platform carrying subsets or independent modules, assembled to ensure the formation of a box from the blank shown in Figure 1.
- These modules can be manufactured independently and then mounted on the frame 22.
- the frame 21 provides the connection between the two end modules, namely the storage-unstacking module 30 and the extraction module 60.
- an electrical cabinet that includes a programmable machine control machine, known in itself.
- the first storage-unstacking module 30 comprises a storage magazine 31 in the semi-vertical position of the blanks 1 to be formed.
- This comprises two modular chains 32 driven by a system 33, comprising for example an asynchronous motor.
- the chains 32 are for example coupled to a freewheel 34 and allow to maintain a blank ready to be fed in front portion 36.
- the blanks are stored with the printed side facing the outside of the machine and the tab of the blank located on the right side of the machine in the direction of the blanks.
- This module 30 also comprises means 35 (see FIG. 3) for unstacking the blanks 1 from the magazine 31.
- these unstacking means comprise suction extraction means of the blank from the magazine 31 and a system of articulated arms.
- the gluing module 40 comprises the gluing device according to the embodiment of the invention more particularly described here.
- This comprises a plane support 41, such as a table, intended to receive a blank 1.
- a plane support 41 such as a table
- tabs 410 which are fixed with respect to the table, making it possible to position the blank. blank.
- the gluing device also comprises a system of articulated arms 42 supporting a nozzle 420 positioned above the support.
- the forming module 50 comprises a mandrel 51, that is to say a form tool, around which the blank previously glued by the sizing device will be formed.
- transfer means 43 comprising a system of articulated arms situated under the table 41 and capable of grasping a blank from below by means of FIG. aspiration. This articulated arm system and its operation will be described in more detail with reference to Figs. 10 and 11A-11C.
- the forming module 50 (see FIG. 4) comprises two pods 52, 53, integral with the frame 21 and arranged on either side of the mandrel 51, transversely and symmetrically with respect to the direction of delivery. flan from the gluing station.
- nacelles comprise, in the example illustrated in Figures 2 to 5, the winding means of the flaps and the tongue of the fixing means.
- the extraction module 60 makes it possible to extract a box or portion of box with a polygonal section from the mandrel 51 where it has been formed, by means of extractor means 61.
- the latter comprise, in the illustrated example, suction means of the box or part of box and are designed to be able to deposit the box or part of box thus extracted on one or the other of the conveyors 62, 63.
- the storage-unstacking module 30 and the gluing module 40 will now be described in more detail.
- FIGS. 6 and 7A to 7F schematically illustrate the magazine 31 of blanks 1 stored in semi-vertical position (angle ⁇ , for example of the order of 75 °) as well as the unstacking means 35.
- These unstacking means 35 essentially comprise a pair of main arms 350 interconnected by two axes 351 and 353. As illustrated in FIG. 6, the two shafts 351 and 353 are spaced apart from one another and they extend substantially transversely, that is to say substantially perpendicular to the direction of movement of the blanks in the machine. These main arms are able to move in rotation about the axis 351 which is fixed relative to the frame 21.
- Each main arm 350 supports a secondary arm 352.
- the two secondary arms 352 are, at one of their ends, rotatably mounted about the axis 353 common to the two main arms 350.
- this articulated arm system 350, 352 can be positioned in the machine so as to be substantially centered with respect to the magazine 31, in the transverse direction of the machine, that is to say in the middle part of the machine.
- the secondary arms are mounted to rotate on supports 357 for a bar 354.
- This bar 354 extends substantially perpendicular to the longitudinal axis of the machine 20 or to the direction in which the blanks 1 move inside the machine 20.
- the length of this bar is much smaller than the transverse dimension of the store and is therefore completely the inside of the surface defined by the blank, whatever its dimensions.
- This bar comprises suction means 355 capable of coming into contact with a blank 1.
- suction means are conventionally constituted by a suction cup system supplied with vacuum.
- the unstacking means 35 comprise a link 356 for each of the secondary arms 352 which is rotatably mounted at one end on the main arm 350, at the axis 353 and via a part 356a. , and at the other end, on a support 357 integral with the bar 354.
- this piece 356a could be omitted.
- Figs. 7A to 7E there is illustrated a front stop 358 and a rear pusher 359 located above the table 41 (not shown in the figures).
- FIG. 7A schematically shows blanks 1 stored in the magazine 31, the blanks bearing on the two chains 32 illustrated in FIGS. 2, 4 and 5.
- the blanks are stored with their printed side towards the outside of the machine, the sticking tongue being located on the right in the direction of movement of the blanks inside the machine.
- the suction means 355 carried by the bar 354 bear against the blank 1, located at the front portion 36 of the magazine 31, and are activated to grip the blank.
- the main shafts 350 then rotate about the shaft 351 in a counter-clockwise direction as illustrated in FIGS. 7B-7C.
- the movement of the main shafts is controlled by a servomotor. Furthermore, the secondary arms 352 rotate about the axis 353, in the direction of clockwise and here in a ratio of 36/45.
- FIG. 7B illustrates the extraction of the cutout thanks to the suction means 355 which is carried out along a semi-linear trajectory, thanks to the link 356.
- Figure 7C illustrates the rotation of the blank 1, the movement of the rod 356 is then amplified.
- Figure 7D shows the blank 1 substantially horizontally, and therefore parallel to the table 41 shown in Figure 3, the blank turned by 105 ° when the angle is 75 °.
- the suction means 355 are then disabled and the blank 1 is released so as to bear on the table 41 (not shown in Figure 7E).
- Figure 7F illustrates the last step of unstacking and shows the function of the front stop 358 and the rear pusher 359.
- the pusher 359 is in the retracted position in all the steps illustrated in FIGS. 7A to 7E and in extended position during the step illustrated in FIG. 7F. This allows positioning the blank against the stop before 358 and to ensure proper positioning of the blank before the removal of the adhesive.
- the unstacking means comprises a single system of articulated arms 350, 352, unlike many embodiments of the state of the art. This considerably reduces the clutter inside the machine and therefore facilitates maintenance and reduces the risk of accidents for operators.
- the articulated arm system 350, 352 can be positioned in the middle part of the machine or slightly offset, as illustrated in Figures 4 and 5. It can thus be located substantially in the central third of the machine.
- system of articulated arms is located substantially in alignment with the mandrel 51 or against the flap of the blank intended to come under the mandrel, during the formation of a box.
- system of articulated arms is sufficiently far from the edges of the machine to ensure the safety of the operators.
- the unstacking device makes it possible to reduce the height differential between the bottom of the magazine and the removal zone of the gluing station.
- FIG. 8 illustrates in more detail the sizing means 42 of the sizing module 40, seen from the storage-unstacking module 30.
- These means 42 here comprise a main arm 420 rotatably mounted about an axis 421 integral with the frame 21 of the machine.
- They also comprise a secondary arm 422 rotatably mounted on the main arm 420 about the axis 423.
- This secondary arm supports, at its end opposite the axis 423, an L-shaped support 424 for a nozzle 425.
- the support 424 is articulated on the secondary arm 422 about an axis 426.
- the blank 1 is positioned on the table 1 thanks to the catches 410 illustrated in FIG. 3, in contact with the transverse edges 17 and 18 of the blank 1 and by the front stop 358 and the rear pusher 359 illustrated on the FIGS. FIGS. 7A to 7F, in contact with the transverse edges 19 of the blank.
- the blank 1 is stationary and the sizing means 42 are controlled by a servomotor so as to position the nozzle between the flaps 16d and 16c.
- Means 42 are then controlled so that the nozzle moves transversely or perpendicularly to the blank feed direction, and deposits lines of adhesive 427 on the flap 16c.
- the result obtained is shown in Figure 9B.
- FIG. 9D illustrates a last step of the sizing process, in which the means 42 remain stationary and the blank 1 is moved longitudinally towards the front of the machine, as will be described in more detail with reference to FIGS. 10 and 11A to 11C.
- this line of adhesive 429 may be deposited about 10 mm from the free edge of the shutter 3.
- the invention is not limited to this mode of implementation and the line of adhesive 429 could also be deposited on the tongue 7.
- transfer means 43 which allow the transfer of a blank from the sizing station to the forming station.
- These means comprise an articulated arm system which is located below the level of the table 41, as illustrated for example in FIG.
- This articulated arm system comprises a pair of main arms 430 interconnected by two axes 431 and 432, spaced apart from each other.
- the main arms 430 are rotatably mounted about the axis 431 which is fixed relative to the frame 21.
- the system also comprises two secondary arms 433 which are mounted at one end, in rotation about the axis 432.
- the secondary arms 433 are interconnected by an axis 434 around which two support means 435 are rotatably mounted, so as to remain in a substantially vertical position, whatever the position of the main arms and the secondary arms.
- FIG. 11A very schematically illustrates the sizing station with the sizing device 42 which has just been described with reference to FIGS. 8 and 9A to 9D.
- a blank 1 is present in the sizing station and the sizing means 42 finish the deposition of the adhesive lines 428 on the flap 16a.
- the transfer means are then in a position such that the suction means 436 are located under the blank 1 and away from it.
- each support means 435 comprises two rods telescopically mounted.
- the suction means 436 are supported by the inner rod 435a and are movable in vertical translation in the outer rod 435b of each support means.
- Fig. 11A also schematically illustrates the forming station, showing only the mandrel 51.
- FIG. 11B illustrates the next step, the main 430 and secondary arms 433 remaining stationary.
- the suction means 436 are then actuated to grip the blank 1.
- FIG. 11B illustrates the next step in which the transfer means 43 are controlled so that the main shafts 430 rotate around the axis 431 in the counterclockwise direction, while the secondary arms 433 about the axis 432 clockwise.
- This step corresponds to that illustrated in FIG. 9D, during which the adhesive line 429 is deposited near the free edge of the shutter 3.
- the main arms 430 continue their rotational movement about the axis 431, in a counterclockwise direction, while the secondary arms 433 continue their rotational movement about the axis 432 in the clockwise direction.
- FIG. 11D illustrates the end of the movement of the articulated arm system 43, the blank 1 being then positioned under the mandrel 51.
- a first blank 1 is extracted by semi-linear movement and is tilted horizontally (see FIGS. 7A to 7B).
- adhesive lines 427, 428 are deposited on at least two lateral flaps 16c and 16a, on the upper face of the blank, the lower face constituting the printed face of the blank.
- the blank is then transferred from the sizing station to the forming station and is carried out, during this transfer, the deposition of the adhesive line 429 near the free edge of the flap 3 or on the tongue 7.
- the blank 1 being positioned under the mandrel, it is wound around the mandrel, here by means of two nacelles 52 and 53.
- this forming can be achieved by any means.
- the flap 3 is glued to the tongue 7 and the side flaps 16a and 16c are glued to the flaps 16b and 16d to form the bottom of the box on the end face 510 of the mandrel. The latter is turned on the side of the extraction module 60.
- the latter extracts, by any appropriate means, the box thus formed from the mandrel 51, so as to deposit it on one or other of the conveyors 62 or 63.
- the above description also applies to the formation of a box part, in particular a lid or a bottom.
- this method is implemented in the context of a successive and automatic forming of boxes or box parts, so that blank is glued during forming of the blank n-1.
- the storage-unstacking module 30 and the module 40 for gluing the blanks are designed so that the movements of the blank are ensured by rotational movements, in particular by articulated arm systems. , so as to avoid the presence of linearly moving means. Indeed, such means are sources of play, which generates wear and inaccuracy in positioning.
- the invention therefore allows greater precision, which eliminates the guiding or abutment means which are associated with the linear displacement means.
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- Sheets, Magazines, And Separation Thereof (AREA)
Abstract
The present invention relates to a device for removing a blank (1) of sheet material from a magazine in which the blanks are stacked, said device comprising suction-based extraction means (355) for extracting the blank from the stack and a single system of articulated arms (350, 352) for rotating each blank extracted from the supply unit (30) and laying said blank flat.
Description
PROCEDE ET DISPOSITIF DE DEPILAGE D ' UN FLAN METHOD AND DEVICE FOR DEPILING A FLAN
La présente invention concerne un procédé de dépilage d'un flan de matière en feuille destiné à être transféré, après encollage, à un poste de formage autour d'un mandrin, pour obtenir une boîte ou partie de boîte à section polygonale. The present invention relates to a method of unstacking a blank of sheet material to be transferred, after sizing, to a forming station around a mandrel, to obtain a box or portion of box polygonal section.
Elle concerne également un dispositif de dépilage d'un flan de matière en feuille. It also relates to a device for unstacking a blank of sheet material.
Ce flan comporte classiquement une suite d'au moins trois volets, à savoir deux volets extrêmes situés de part et d' autre d' au moins un volet intermédiaire, lesdits volets étant reliés les uns aux autres par des lignes de pliage parallèles et pourvus de rabats latéraux, reliés respectivement auxdits volets par des lignes de pliage perpendiculaires aux lignes de pliage reliant lesdits volets, le bord libre d'un des volets extrêmes étant pourvu d'une languette reliée audit volet extrême par une ligne de pliage parallèle aux lignes de pliage reliant lesdits volets. This blank conventionally comprises a sequence of at least three parts, namely two extreme flaps located on either side of at least one intermediate flap, said flaps being connected to each other by parallel fold lines and provided with lateral flaps, respectively connected to said flaps by fold lines perpendicular to the fold lines connecting said flaps, the free edge of one of the end flaps being provided with a tongue connected to said end flap by a fold line parallel to the fold lines connecting said shutters.
Lorsque le flan comporte trois volets, il permet d'obtenir une partie d'une boîte (couvercle ou fond) . Lorsqu'il comporte au moins quatre volets, il permet d'obtenir une boîte. When the blank has three flaps, it allows to obtain a part of a box (cover or bottom). When it has at least four parts, it makes it possible to obtain a box.
Cette invention trouve une application particulièrement importante bien que non exclusive dans le domaine des boîtes renforcées en carton ondulé . This invention finds a particularly important, although not exclusive, application in the field of reinforced corrugated boxes.
Les flans sont classiquement stockés dans un magasin sous la forme d'une pile.
Différents moyens peuvent être prévus pour retirer un flan du magasin de stockage pour le déposer à plat dans la zone de dépose d'un poste d'encollage. The blanks are typically stored in a store in the form of a stack. Various means can be provided for removing a blank from the storage magazine to lay it flat in the removal area of a sizing station.
C'est dans ce poste que, pour permettre l'obtention d'une boîte ou d'une partie d'une boîte, un adhésif est déposé d'une part, sur deux rabats latéraux et d'autre part, sur la languette d'un volet extrême ou à proximité du bord libre du volet extrême opposé à ladite languette. It is in this position that to obtain a box or part of a box, an adhesive is deposited on one side, on two side flaps and on the other hand, on the tongue of an end flap or near the free edge of the end flap opposite said tongue.
Ainsi, le document EP 0 334 707 décrit des moyens de prise par aspiration du flan supérieur d'une pile de flans déposés horizontalement. Ces moyens sont mobiles verticalement et selon le sens de transfert des flans dans la machine. Ils permettent ainsi de prélever successivement les flans de la pile pour les déposer sur une table. Thus, the document EP 0 334 707 describes means for gripping by suction of the upper blank of a stack of blanks laid horizontally. These means are movable vertically and in the direction of transfer of the blanks in the machine. They thus make it possible to take successively the blanks of the stack to deposit them on a table.
Ces moyens de dépilage présentent l'inconvénient d'une cadence relativement lente, de l'ordre de 20 flans par minute du fait des courses importantes imposées aux moyens de prise. Il convient de noter de surcroit que ces courses augmentent avec la taille des flans. These unstacking means have the disadvantage of a relatively slow rate, of the order of 20 blanks per minute because of the large strokes imposed on the gripping means. It should be noted in addition that these races increase with the size of the blanks.
On connaît également un dispositif de dépliage dit « Klik Klok » comprenant une barre munie d'une pluralité de ventouses et montée pivotante autour d'un axe de rotation. Cette barre est supportée par une fourche présentant deux bras articulés, chacun d'eux étant fixé à une extrémité de la barre. Also known is an unfolding device called "Klik Klok" comprising a bar provided with a plurality of suction cups and pivotally mounted about an axis of rotation. This bar is supported by a fork having two articulated arms, each of them being attached to one end of the bar.
Ce dispositif présente l'avantage de réduire les courses et donc de permettre des cadences plus rapides, pouvant atteindre 120 flans par minute.
Il présente cependant de nombreux inconvénients.This device has the advantage of reducing strokes and therefore allow faster rates, up to 120 blanks per minute. However, it has many disadvantages.
En effet, entre les deux bras articulés, la fourche a une longueur supérieure à celle du flan de plus grandes dimensions. Du fait de son encombrement, elle s'étend nécessairement jusqu'aux bords longitudinaux de la machine. Indeed, between the two articulated arms, the fork has a length greater than that of the blank of larger dimensions. Because of its size, it necessarily extends to the longitudinal edges of the machine.
Ceci est une source de risques pour les opérateurs, notamment lors de la maintenance de la machine. C'est pourquoi un tel dispositif de dépilage peut ne pas remplir les normes de sécurité actuelles. This is a source of risk for the operators, especially during the maintenance of the machine. This is why such an unstacking device may not meet the current safety standards.
Par ailleurs, la conception du dispositif nécessite un différentiel de hauteur relativement important entre le bas du magasin et la zone de dépose du poste d'encollage. Furthermore, the design of the device requires a relatively large height differential between the bottom of the store and the removal area of the sizing station.
Ceci est une source de pénibilité pour les opérateurs qui doivent remplir le magasin de stockage pour assurer le fonctionnement de la machine. This is a source of difficulty for operators who must fill the storage warehouse to ensure the operation of the machine.
A cet égard, les normes en vigueur définissent la limite maximale à laquelle un opérateur doit soulever une charge. In this respect, the standards in force define the maximum limit at which an operator must lift a load.
L'invention a pour objet de pallier ces inconvénients en proposant un procédé et un dispositif de dépliage d'un flan de matière en feuille permettant de réaliser le dépilage avec précision et en assurant une plus grande sécurité et une bonne ergonomie pour le personnel présent, tout en permettant des cadences rapides. The object of the invention is to overcome these drawbacks by proposing a method and a device for unfolding a blank of sheet material making it possible to carry out unstacking with precision and by ensuring greater safety and good ergonomics for the personnel present, while allowing fast rates.
Ainsi, l'invention concerne un dispositif de dépilage d'un flan de matière en feuille à partir d'un magasin dans lequel les flans sont disposés en pile, ledit dispositif comprenant des moyens
d'extraction par aspiration du flan de ladite pile et un seul système de bras articulés, pour déplacer en rotation chaque flan extrait du poste d'alimentation et le déposer à plat. Thus, the invention relates to a device for unstacking a blank of sheet material from a magazine in which the blanks are arranged in a stack, said device comprising means suction extraction of the blank of said stack and a single system of articulated arms, for rotating each blank extracted from the feed station and lay flat.
Dans des modes de réalisation avantageux, on a par ailleurs et/ou de plus recours à l'une et/ou à l'autre des dispositions suivantes : In advantageous embodiments, one or more of the following provisions are also and / or in addition:
- le système de bras articulés porte une barre munie des moyens d'extraction par aspiration, cette barre s' étendant selon une direction transversale ; the articulated arm system carries a bar provided with extraction extraction means, this bar extending in a transverse direction;
- le système de bras articulés comporte au moins un bras principal monté en rotation autour d'un axe fixe par rapport au bâti, un bras secondaire monté en rotation autour du bras principal et autour d'un support de ladite barre et une biellette montée en rotation sur le bras principal et sur ledit support. the articulated arm system comprises at least one main arm rotatably mounted about a fixed axis relative to the frame, a secondary arm rotatably mounted around the main arm and around a support of said bar and a rod mounted in rotation on the main arm and on said support.
L' invention concerne également un procédé de dépilage d'un flan de matière en feuille provenant d'un poste d'alimentation et étant destiné à être transféré, après dépilage et dépose sur le support d'un poste d'encollage, à un poste de formage pour obtenir une boîte ou partie de boîte à section polygonale, mis en œuvre avec le dispositif selon l'invention, procédé dans lequel le flan est extrait par aspiration d'une pile de flans, disposés de façon inclinée par rapport audit support du poste d'encollage, déplacé en rotation et libéré au poste d'encollage pour être positionné à plat sur ledit support, support avec lequel il est en contact avec sa face inférieure.
De façon préférée, l'extraction dudit flan est réalisée selon une trajectoire semi-linéaire. The invention also relates to a method of unstacking a blank of sheet material from a feed station and being intended to be transferred, after unstacking and deposited on the support of a sizing station, to a station for forming a box or part of a box with a polygonal section, implemented with the device according to the invention, in which the blank is extracted by suction of a stack of blanks arranged inclined with respect to said support of gluing station, moved in rotation and released at the sizing station to be positioned flat on said support, support with which it is in contact with its underside. Preferably, the extraction of said blank is carried out along a semi-linear trajectory.
L' invention concerne également un procédé de formation d'une boîte ou d'une partie de boîte à section polygonale à partir d'un flan de matière en feuille comportant une suite d'au moins trois volets, à savoir deux volets extrêmes situés de part et d'autre d'au moins un volet intermédiaire, lesdits volets étant reliés les uns aux autres par des lignes de pliage parallèles et pourvus de rabats latéraux, reliés respectivement auxdits volets par des lignes de pliage perpendiculaires aux lignes de pliage reliant lesdits volets, le bord libre d'un des volets extrêmes dudit ensemble de volets étant pourvu d'une languette reliée audit volet extrême par une ligne de pliage parallèle aux lignes de pliage reliant lesdits volets, procédé selon lequel, dans un poste de formage, on forme le flanc par enroulement des volets autour d'un mandrin à section polygonale dont la section transversale externe correspond à la section transversale interne de la boîte ou de la partie de boîte à obtenir, caractérisé en ce que le flanc est préalablement dépilé dans un poste de dépilage, en mettant en œuvre le procédé de dépilage selon 1' invention . The invention also relates to a method of forming a box or box portion with a polygonal section from a blank of sheet material having a sequence of at least three flaps, namely two extreme flaps located from on either side of at least one intermediate flap, said flaps being connected to each other by parallel fold lines and provided with lateral flaps, respectively connected to said flaps by fold lines perpendicular to the fold lines connecting said flaps , the free edge of one of the end flaps of said flap assembly being provided with a tongue connected to said end flap by a folding line parallel to the fold lines connecting said flaps, in which process, in a forming station, is formed the flank by winding the flaps around a mandrel with a polygonal section whose external cross-section corresponds to the internal cross-section of the box or the part box to obtain, characterized in that the flank is previously depilated in an unstacking station, implementing the unstacking process according to the invention.
Il convient également de noter que de nombreux procédés et dispositifs d'encollage de flan sont connus . It should also be noted that many methods and devices for gluing blanks are known.
Ainsi, le document EP 0 334 707, cité plus haut, décrit un procédé consistant à prélever successivement les flans dans un magasin et à les
déposer sur une table munie de doigts d' entraînement . Ces derniers font glisser le flan sur la table pour l'amener sous le mandrin. Pendant le transfert vers le mandrin, le flan rencontre des encolleurs disposés au-dessus et au-dessous de la table qui déposent des lignes d'adhésif sur le flan, au niveau de deux rabats latéraux et de la languette d'un volet extrême ou à une proximité du bord libre du volet extrême opposé à la languette. Thus, the document EP 0 334 707, cited above, describes a method of successively taking the blanks in a store and the place on a table equipped with training fingers. They slide the blank on the table to bring it under the mandrel. During the transfer to the mandrel, the blank encounters gluing devices arranged above and below the table which deposit lines of adhesive on the blank, at the level of two lateral flaps and the tongue of an end flap or at a proximity of the free edge of the end flap opposite to the tongue.
De nombreuses variantes de ce procédé ont été proposées et elles apportent globalement satisfaction . Many variants of this process have been proposed and they provide overall satisfaction.
Ces procédés présentent néanmoins des inconvénients car ils prévoient tous que la dépose de l'adhésif s'effectue lors du transfert du flan, ce qui impose de guider très précisément les flans pour s'assurer que la boîte obtenue sera effectivement formable de façon équerrée. These methods nevertheless have disadvantages since they all provide that the removal of the adhesive is effected during the transfer of the blank, which requires very precise guidance of the blanks to ensure that the box obtained will actually be formally squared.
Par ailleurs, l'adhésif destiné à être déposé par en-dessous sur la face inférieure du flan, au niveau des rabats, peut aboutir sur le bâti de la machine, ce qui est préjudiciable à la fois au collage final de la boîte et à la maintenance de la machine. Furthermore, the adhesive intended to be deposited from below on the underside of the blank, at the level of the flaps, can lead to the frame of the machine, which is detrimental both to the final bonding of the box and to the maintenance of the machine.
L'invention a donc également pour objet de pallier ces inconvénients en proposant un procédé et une machine de formation d'une boîte permettant de réaliser la dépose d'adhésif avec une grande précision, tout en étant d'une conception et/ou d'une mise en œuvre simplifiée.
C'est pourquoi, dans des modes de réalisation avantageux, on a par ailleurs et/ou de plus recours à l'une et/ou à l'autre des dispositions suivantes : The invention therefore also aims to overcome these disadvantages by providing a method and a box forming machine for performing the removal of adhesive with high accuracy, while being a design and / or a simplified implementation. Therefore, in advantageous embodiments, one or more of the following provisions are also and / or in addition:
- un adhésif étant déposé d'une part, sur deux rabats latéraux et d'autre part, sur ladite languette d'un volet extrême ou à proximité du bord libre du volet extrême opposé à ladite languette et le flan étant positionné à plat sur un support d'un poste d'encollage, support avec lequel il est en contact avec sa face inférieure, le dépôt de l'adhésif est réalisé sur la face supérieure desdits au moins deux rabats latéraux et de ladite languette ou du volet extrême opposé à ladite languette. an adhesive being deposited on the one hand, on two lateral flaps and on the other hand, on said tongue of an end flap or near the free edge of the end flap opposite said tongue and the blank being positioned flat on a support of a sizing station, support with which it is in contact with its lower face, the deposition of the adhesive is formed on the upper face of said at least two side flaps and said tab or the opposite flap opposite said tongue.
- le dépôt de l'adhésif est réalisé au moyen d'au moins une buse associée à des moyens de déplacement ; the deposition of the adhesive is carried out by means of at least one nozzle associated with displacement means;
- les moyens de déplacement de ladite au moins une buse comprennent au moins un bras articulé ; the means for moving said at least one nozzle comprise at least one articulated arm;
- le dépôt de l'adhésif sur lesdits rabats est réalisé alors que le flan est immobile et ladite au moins une buse en mouvement, grâce auxdits moyens de déplacement ; the deposition of the adhesive on said flaps is carried out while the blank is immobile and said at least one nozzle in motion, thanks to said moving means;
- le dépôt d'adhésif, sur ladite languette ou le volet extrême opposé à ladite languette est réalisé lorsque le flan est déplacé selon un mouvement linéaire vers le poste de formage, ladite buse étant immobile . - The deposition of adhesive on said tab or the end flap opposite said tab is formed when the blank is moved in a linear motion to the forming station, said nozzle being stationary.
- le flan est saisi par des moyens d'aspiration et déplacé du poste d'encollage au poste de formage par un mouvement de translation desdits moyens d'aspiration de direction parallèle aux lignes de pliage entre les volets du flan.
L' invention concerne également un procédé de formage successif automatique de boîtes ou parties de boîte mettant un œuvre un procédé de formation d'une boîte ou partie de boîte selon l'invention, caractérisé en ce que l'on encolle le flan n pendant le formage du flan n - 1. the blank is gripped by suction means and moved from the sizing station to the forming station by a translational movement of said direction suction means parallel to the fold lines between the flaps of the blank. The invention also relates to a method for the automatic successive forming of boxes or parts of a box embodying a method of forming a box or part of a box according to the invention, characterized in that the blank n is forming of the blank n - 1.
L' invention concerne également une machine de formation d'une boîte ou d'une partie de boîte à section polygonale comprenant un magasin dans lequel les flans sont disposés en pile, et une poste de stockage-dépilage avec un dispositif de dépilage selon l'invention, un poste d'encollage avec un support pour ledit flan et un poste de formage dans lequel est réalisé l'enroulement du flan autour d'un mandrin. The invention also relates to a machine for forming a box or box portion with a polygonal section comprising a magazine in which the blanks are arranged in a stack, and a storage-unstacking station with an unstacking device according to the invention. invention, a sizing station with a support for said blank and a forming station in which is formed the winding of the blank around a mandrel.
Dans des modes de réalisation avantageux, on a par ailleurs et/ou de plus recours à l'une et/ou à l'autre des dispositions suivantes : In advantageous embodiments, one or more of the following provisions are also and / or in addition:
dans le magasin, les flans sont disposés de façon inclinée par rapport au support du poste d' encollage in the magazine, the blanks are arranged inclined with respect to the support of the gluing station
- le poste d'encollage comprend également - the gluing station also includes
• au moins une buse susceptible de délivrer un adhésif, positionnée au-dessus du support et associée à des moyens de déplacement et At least one nozzle capable of delivering an adhesive, positioned above the support and associated with displacement means and
• des moyens de commande desdits moyens de déplacement pour assurer le dépôt d'adhésif par le dessus sur lesdits rabats et ladite languette ou ledit volet extrême opposé à ladite languette.
- le poste d'encollage comprend des moyens de calage du flan sur ledit support dans une position de référence ; Means for controlling said moving means to ensure the adhesive deposit from above on said flaps and said tongue or said end flap opposite to said tongue. the sizing station comprises means for setting the blank on said support in a reference position;
- le flan est déplacé du poste d'encollage au poste de formage par un système de bras articulés, situé sous le support ; - The blank is moved from the gluing station to the forming station by a system of articulated arms, located under the support;
- le système de bras articulés est associé à des moyens de solidarisation du flan, notamment par aspiration . the articulated arm system is associated with means for securing the blank, in particular by suction.
L' invention sera mieux comprise et ses avantages apparaîtront plus clairement à la lecture de la description qui suit de modes de réalisation donnés à titre d'exemples non limitatifs. La description se réfère aux dessins qui l'accompagnent dans lesquels : The invention will be better understood and its advantages will appear more clearly on reading the following description of embodiments given as non-limiting examples. The description refers to the accompanying drawings in which:
La figure 1 montre en vue de dessus un mode de réalisation d'un flan utilisable avec le procédé et le dispositif d'encollage selon l'invention. FIG. 1 shows in plan view an embodiment of a blank that can be used with the method and the sizing device according to the invention.
La figure 2 est une vue en perspective d'une machine de formation d'une boîte à section polygonale, à partir du flan illustré à la figure 1, incluant un dispositif d'encollage selon l'invention. Figure 2 is a perspective view of a polygonal section box forming machine, from the blank shown in Figure 1, including a sizing device according to the invention.
La figure 3 est une vue de côté en coupe longitudinale de la machine illustrée à la figure 2, plus précisément du côté droit de la machine dans le sens d'acheminement des flans. Figure 3 is a side view in longitudinal section of the machine shown in Figure 2, more precisely on the right side of the machine in the direction of routing of the blanks.
Les figures 4 et 5 sont des vues de dessus de la machine illustrée à la figure 2, la figure 5 différant de la figure 4 en ce qu'elle représente également des flans en cours de traitement sur la machine.
La figure 6 est une vue en perspective illustrant le dispositif de dépilage des flans depuis un magasin . Figures 4 and 5 are top views of the machine shown in Figure 2, Figure 5 differing from Figure 4 in that it also shows blanks being processed on the machine. Figure 6 is a perspective view illustrating the unstacking device blanks from a store.
Les figures 7A à 7F sont des vues de côté du dispositif de dépliage, illustrant les différentes étapes conduisant un flan depuis le magasin d'alimentation jusqu'à sa mise en place au poste d' encollage . Figures 7A-7F are side views of the unfolding device, illustrating the various steps leading a blank from the feed magazine to its establishment at the sizing station.
La figure 8 est une vue en perspective illustrant des moyens pour délivrer un adhésif. Fig. 8 is a perspective view illustrating means for delivering an adhesive.
Les figures 9A à 9D illustrent les différentes étapes de dépose d'adhésif sur le flan. Figures 9A to 9D illustrate the different steps of adhesive removal on the blank.
La figure 10 est une vue en perspective des moyens de déplacement du flan depuis le poste d'encollage vers le poste de formage. Figure 10 is a perspective view of the blank moving means from the sizing station to the forming station.
Les figures 11A à 11D illustrent les différentes étapes du déplacement du flan depuis le poste d'encollage vers le poste de formage. FIGS. 11A to 11D illustrate the different steps of moving the blank from the sizing station to the forming station.
Les éléments communs aux différentes figures seront désignés par les mêmes références. The elements common to the different figures will be designated by the same references.
La figure 1 montre un flan 1 en carton ondulé double face, par exemple à faible grammage (< 250 g/m2) par exemple d'épaisseur 3 mm destiné à former une boîte. FIG. 1 shows a blank 1 of double-sided corrugated cardboard, for example of low grammage (<250 g / m 2) for example of thickness 3 mm intended to form a box.
II comporte une suite 2 de quatre volets principaux rectangulaires 3, 4, 5, 6 terminés par une languette de collage 7 et reliés entre eux par des premières lignes de pliage, parallèles entre elles, à savoir une première ligne de pliage centrale ou de référence 8, deux premières lignes de pliage
latérales 9 et 10, et une première ligne de pliage d'extrémité 11, de jonction avec la languette 7. It comprises a sequence 2 of four rectangular main flaps 3, 4, 5, 6 terminated by a gluing tab 7 and interconnected by first fold lines parallel to one another, namely a first central or reference fold line. 8, first two lines of folding 9 and 10, and a first end fold line 11, junction with the tongue 7.
Les volets 3 et 6 sont dénommés volets extrêmes et les volets 4 et 5, volets intermédiaires. The shutters 3 and 6 are called extreme shutters and the shutters 4 and 5, intermediate shutters.
Le flan comprend de façon connue en elle-même un premier jeu 12 de rabats 13 rectangulaires ou sensiblement rectangulaires reliés aux volets principaux par des deuxièmes lignes de pliage 14 perpendiculaires aux premières et propres à former le dessus de la boîte après remplissage et un deuxième jeu 15 de rabats 16a à 16d rectangulaires ou sensiblement rectangulaires également reliés aux volets principaux par des deuxièmes lignes de pliage 14 et propres à former le fond de la boîte. The blank comprises, in a manner known per se, a first set 12 of rectangular or substantially rectangular flaps 13 connected to the main flaps by second fold lines 14 perpendicular to the first and adapted to form the top of the box after filling and a second set 15 flaps 16a to 16d rectangular or substantially rectangular also connected to the main flaps by second fold lines 14 and fit to form the bottom of the box.
Le procédé et le dispositif selon l'invention peuvent également utiliser des variantes du flan illustré à la figure 1 et notamment un flan comportant des volets principaux rectangulaires reliés entre eux par des volets secondaires rectangulaires. The method and the device according to the invention can also use variants of the blank illustrated in FIG. 1 and in particular a blank comprising rectangular main shutters interconnected by rectangular secondary shutters.
De façon connue, ces volets secondaires forment, sur la boîte finale, les angles biseautés de cette dernière . In known manner, these secondary flaps form, on the final box, the bevelled angles of the latter.
Ils peuvent également utiliser des flans comportant un volet intermédiaire et deux volets extrêmes pour l'obtention d'une partie de boîte. They can also use blanks comprising an intermediate flap and two extreme flaps to obtain a box portion.
Il est tout d'abord fait référence aux figures 2 à 5 pour décrire une machine de formation d'une boîte à section polygonale à partir du flan illustré à la figure 1, cette machine comprenant un dispositif de dépilage selon le mode de réalisation de l'invention
plus particulièrement décrit ici, notamment en référence aux autres figures. Reference is first made to FIGS. 2 to 5 to describe a machine for forming a box with a polygonal section from the blank shown in FIG. 1, this machine comprising an unstacking device according to the embodiment of the invention. 'invention more particularly described here, especially with reference to the other figures.
Cette machine 20 comporte un bâti ou structure 21 formant une plateforme porteuse de sous-ensembles ou modules indépendants, assemblés pour assurer la formation d'une boîte à partir du flan illustré à la figure 1. This machine 20 comprises a frame or structure 21 forming a platform carrying subsets or independent modules, assembled to ensure the formation of a box from the blank shown in Figure 1.
Il s'agit du module 30 de stockage-dépilage des flans, du module 40 d'encollage des flans, du module 50 de formage, et du module 60 d'extraction. This is the blank storage-unstacking module 30, the module 40 for gluing the blanks, the forming module 50, and the extraction module 60.
Ces modules peuvent être fabriqués indépendamment et montés ensuite sur le bâti 22. These modules can be manufactured independently and then mounted on the frame 22.
Ainsi, le bâti 21 assure la liaison entre les deux modules d'extrémité, à savoir le module de stockage- dépilage 30 et le module d'extraction 60. Thus, the frame 21 provides the connection between the two end modules, namely the storage-unstacking module 30 and the extraction module 60.
Dans les poteaux 22 du bâti, peut être prévue une armoire électrique qui comprend un automate programmable de pilotage de la machine, connu en lui- même . In the posts 22 of the frame, can be provided an electrical cabinet that includes a programmable machine control machine, known in itself.
Le premier module 30 de stockage-dépilage comporte un magasin 31 de stockage en position semi-verticale des flans 1 à former. The first storage-unstacking module 30 comprises a storage magazine 31 in the semi-vertical position of the blanks 1 to be formed.
Celui-ci comprend deux chaînes modulaires 32 entraînées par un système 33, comprenant par exemple un moteur asynchrone. This comprises two modular chains 32 driven by a system 33, comprising for example an asynchronous motor.
Les chaînes 32 sont par exemple couplées à une roue libre 34 et permettent de maintenir un flan prêt à être alimenté en partie frontale 36. The chains 32 are for example coupled to a freewheel 34 and allow to maintain a blank ready to be fed in front portion 36.
Dans le magasin de stockage 31, les flans sont stockés avec la face imprimée tournée vers l'extérieur de la machine et la languette du flan
située du côté droit de la machine dans le sens de défilement des flans. In the storage magazine 31, the blanks are stored with the printed side facing the outside of the machine and the tab of the blank located on the right side of the machine in the direction of the blanks.
Ce module 30 comporte également des moyens 35 (cf. figure 3) de dépilage des flans 1 depuis le magasin 31. This module 30 also comprises means 35 (see FIG. 3) for unstacking the blanks 1 from the magazine 31.
Comme cela sera décrit plus précisément au regard des figures 6 et 7A à 7F, ces moyens de dépilage comprennent des moyens d'extraction par aspiration du flan depuis le magasin 31 et un système de bras articulés. As will be more specifically described with reference to FIGS. 6 and 7A to 7F, these unstacking means comprise suction extraction means of the blank from the magazine 31 and a system of articulated arms.
Le module d'encollage 40 comporte le dispositif d'encollage selon le mode de réalisation de l'invention plus particulièrement décrit ici. The gluing module 40 comprises the gluing device according to the embodiment of the invention more particularly described here.
Celui-ci comporte un support plan 41, tel qu'une table, destiné à recevoir un flan 1. Sur les bords longitudinaux de cette table 41, sont prévus des taquets 410 fixes par rapport à la table, permettant d'assurer le positionnement du flan. This comprises a plane support 41, such as a table, intended to receive a blank 1. On the longitudinal edges of this table 41, there are provided tabs 410 which are fixed with respect to the table, making it possible to position the blank. blank.
Le dispositif d'encollage comporte également un système de bras articulés 42 supportant une buse 420 positionnée au-dessus du support. The gluing device also comprises a system of articulated arms 42 supporting a nozzle 420 positioned above the support.
Le module 50 de formage comporte un mandrin 51, c'est-à-dire un outil de forme, autour duquel le flan préalablement encollé par le dispositif d'encollage sera formé. The forming module 50 comprises a mandrel 51, that is to say a form tool, around which the blank previously glued by the sizing device will be formed.
Pour déplacer le flan 1 depuis le dispositif d'encollage jusque sous le mandrin 51, sont prévus des moyens de transfert 43 comprenant un système de bras articulés, situés sous la table 41 et susceptibles de saisir par en dessous un flan par des moyens d'aspiration.
Ce système de bras articulés ainsi que son fonctionnement sera décrit plus en détail en référence aux figures 10 et 11A à 11C. In order to move the blank 1 from the gluing device to the mandrel 51, there are provided transfer means 43 comprising a system of articulated arms situated under the table 41 and capable of grasping a blank from below by means of FIG. aspiration. This articulated arm system and its operation will be described in more detail with reference to Figs. 10 and 11A-11C.
Le module de formage 50 (cf. figure 4) comporte quant à lui deux nacelles 52, 53, solidaires du bâti 21 et disposées de part et d'autre du mandrin 51, transversalement et de façon symétrique par rapport à la direction d'amenée du flan depuis le poste d' encollage . The forming module 50 (see FIG. 4) comprises two pods 52, 53, integral with the frame 21 and arranged on either side of the mandrel 51, transversely and symmetrically with respect to the direction of delivery. flan from the gluing station.
Ces nacelles comportent, dans l'exemple illustré sur les figures 2 à 5, les moyens d'enroulement des volets et les moyens de fixation de la languette. These nacelles comprise, in the example illustrated in Figures 2 to 5, the winding means of the flaps and the tongue of the fixing means.
Le module d'extraction 60 permet d'extraire une boîte ou partie de boîte à section polygonale depuis le mandrin 51 où elle a été formée, grâce à des moyens extracteurs 61. The extraction module 60 makes it possible to extract a box or portion of box with a polygonal section from the mandrel 51 where it has been formed, by means of extractor means 61.
Ces derniers comportent, dans l'exemple illustré, des moyens d' aspiration de la boîte ou partie de boîte et sont conçus pour pouvoir déposer la boîte ou partie de boîte ainsi extraite sur l'un ou l'autre des convoyeurs 62, 63. The latter comprise, in the illustrated example, suction means of the box or part of box and are designed to be able to deposit the box or part of box thus extracted on one or the other of the conveyors 62, 63.
Le module 30 de stockage-dépilage et le module d'encollage 40 vont maintenant être décrits plus en détail . The storage-unstacking module 30 and the gluing module 40 will now be described in more detail.
Ainsi, les figures 6 et 7A à 7F illustrent schématiquement le magasin 31 de flans 1 stockés en position semi-verticale (angle a par exemple de l'ordre de 75°) ainsi que les moyens de dépilage 35. Thus, FIGS. 6 and 7A to 7F schematically illustrate the magazine 31 of blanks 1 stored in semi-vertical position (angle α, for example of the order of 75 °) as well as the unstacking means 35.
Ces moyens de dépilage 35 comprennent essentiellement une paire de bras principaux 350 reliés entre eux par deux axes 351 et 353. Comme
l'illustre la figure 6, les deux axes 351 et 353 sont espacés l'un de l'autre et ils s'étendent sensiblement transversalement, c'est-à-dire sensiblement perpendiculairement à la direction de déplacement des flans dans la machine 20. Ces bras principaux sont susceptibles de se déplacer en rotation autour de l'axe 351 qui est fixe par rapport au bâti 21. These unstacking means 35 essentially comprise a pair of main arms 350 interconnected by two axes 351 and 353. As illustrated in FIG. 6, the two shafts 351 and 353 are spaced apart from one another and they extend substantially transversely, that is to say substantially perpendicular to the direction of movement of the blanks in the machine. These main arms are able to move in rotation about the axis 351 which is fixed relative to the frame 21.
Chaque bras principal 350 supporte un bras secondaire 352. Each main arm 350 supports a secondary arm 352.
Les deux bras secondaires 352 sont, à l'une de leurs extrémités, montés mobiles en rotation autour de l'axe 353 commun aux deux bras principaux 350. The two secondary arms 352 are, at one of their ends, rotatably mounted about the axis 353 common to the two main arms 350.
Comme le montre la figure 6, ce système de bras articulés 350, 352 peut être positionné dans la machine de façon à être sensiblement centré par rapport au magasin 31, selon la direction transversale de la machine, c'est-à-dire dans la partie médiane de la machine. As shown in Figure 6, this articulated arm system 350, 352 can be positioned in the machine so as to be substantially centered with respect to the magazine 31, in the transverse direction of the machine, that is to say in the middle part of the machine.
A leur extrémité opposée à celle montée en rotation sur l'axe 353, les bras secondaires sont montés mobiles en rotation sur des supports 357 pour une barre 354. At their end opposite to that mounted in rotation on the axis 353, the secondary arms are mounted to rotate on supports 357 for a bar 354.
Cette barre 354 s'étend sensiblement perpendiculairement à l'axe longitudinal de la machine 20 ou encore à la direction selon laquelle les flans 1 se déplacent à l'intérieur de la machine 20. This bar 354 extends substantially perpendicular to the longitudinal axis of the machine 20 or to the direction in which the blanks 1 move inside the machine 20.
Comme le montre la figure 6, la longueur de cette barre est bien inférieure à la dimension transversale du magasin et elle s'inscrit donc complètement à
l'intérieur de la surface définie par le flan, quelles que soient ses dimensions. As shown in Figure 6, the length of this bar is much smaller than the transverse dimension of the store and is therefore completely the inside of the surface defined by the blank, whatever its dimensions.
Cette barre comporte des moyens d'aspiration 355 susceptibles de venir en contact avec un flan 1. This bar comprises suction means 355 capable of coming into contact with a blank 1.
Ces moyens d'aspiration sont classiquement constitués par un système à ventouses alimenté en vide . These suction means are conventionally constituted by a suction cup system supplied with vacuum.
Enfin, les moyens de dépilage 35 comprennent une biellette 356 pour chacun des bras secondaires 352 qui est montée en rotation, à une extrémité, sur le bras principal 350, au niveau de l'axe 353 et par l'intermédiaire d'une pièce 356a, et, à l'autre extrémité, sur un support 357 solidaire de la barre 354. Finally, the unstacking means 35 comprise a link 356 for each of the secondary arms 352 which is rotatably mounted at one end on the main arm 350, at the axis 353 and via a part 356a. , and at the other end, on a support 357 integral with the bar 354.
II convient de noter que cette pièce 356a pourrait être omise. It should be noted that this piece 356a could be omitted.
Comme cela sera expliqué au regard des figures 7A à 7F, ces biellettes permettent la rotation de la barre 354 sur elle-même. As will be explained with reference to Figures 7A to 7F, these rods allow the rotation of the bar 354 on itself.
Le fonctionnement des moyens de dépilage va maintenant être décrit en référence aux figures 7A à 7F. The operation of the unstacking means will now be described with reference to FIGS. 7A to 7F.
Sur les figures 7A à 7E sont illustrés une butée avant 358 et un pousseur arrière 359 situés au-dessus de la table 41 (non illustrée sur les figures) . In Figs. 7A to 7E there is illustrated a front stop 358 and a rear pusher 359 located above the table 41 (not shown in the figures).
La figure 7A montre schématiquement des flans 1 stockés dans le magasin 31, les flans étant en appui sur les deux chaînes 32 illustrées sur les figures 2, 4 et 5. FIG. 7A schematically shows blanks 1 stored in the magazine 31, the blanks bearing on the two chains 32 illustrated in FIGS. 2, 4 and 5.
Ces deux chaînes sont entraînées de façon indépendante au moyen d'une motorisation asynchrone,
ce qui permet de maintenir les flans en position devant les moyens de dépilage 35. These two chains are driven independently by means of an asynchronous motor, which keeps the blanks in position in front of the unstacking means 35.
Dans le magasin 31, les flans sont stockés avec leur face imprimée vers l'extérieur de la machine, la languette de collage étant située à droite selon le sens de déplacement des flans à l'intérieur de la machine . In the magazine 31, the blanks are stored with their printed side towards the outside of the machine, the sticking tongue being located on the right in the direction of movement of the blanks inside the machine.
A la figure 7A, les moyens d'aspiration 355 portés par la barre 354 viennent en appui sur le flan 1, situé à la partie frontale 36 du magasin 31, et sont activés pour saisir le flan. In FIG. 7A, the suction means 355 carried by the bar 354 bear against the blank 1, located at the front portion 36 of the magazine 31, and are activated to grip the blank.
Les arbres principaux 350 tournent alors autour de l'arbre 351, dans un sens contraire aux aiguilles d'une montre, comme l'illustrent les figures 7B à 7C. The main shafts 350 then rotate about the shaft 351 in a counter-clockwise direction as illustrated in FIGS. 7B-7C.
Le mouvement des arbres principaux est piloté par un servomoteur. Par ailleurs, les bras secondaires 352 tournent autour de l'axe 353, dans le sens des aiguilles d'une montre et ici dans un rapport de 36/45. The movement of the main shafts is controlled by a servomotor. Furthermore, the secondary arms 352 rotate about the axis 353, in the direction of clockwise and here in a ratio of 36/45.
En particulier, la figure 7B illustre l'extraction de la découpe grâce aux moyens d'aspiration 355 qui s'effectue selon une trajectoire semi-linéaire, grâce à la biellette 356. In particular, FIG. 7B illustrates the extraction of the cutout thanks to the suction means 355 which is carried out along a semi-linear trajectory, thanks to the link 356.
La figure 7C illustre quant à elle la rotation du flan 1, le mouvement de la biellette 356 étant alors amp1ifié . Figure 7C illustrates the rotation of the blank 1, the movement of the rod 356 is then amplified.
La figure 7D montre le flan 1 sensiblement à l'horizontale, et donc parallèle à la table 41 illustrée à la figure 3, le flan ayant tourné de 105° lorsque l'angle a est de 75°.
Comme l'illustre la figure 7E, les moyens d'aspiration 355 sont alors désactivés et le flan 1 est lâché de façon à venir en appui sur la table 41 (non représentée sur la figure 7E) . Figure 7D shows the blank 1 substantially horizontally, and therefore parallel to the table 41 shown in Figure 3, the blank turned by 105 ° when the angle is 75 °. As illustrated in Figure 7E, the suction means 355 are then disabled and the blank 1 is released so as to bear on the table 41 (not shown in Figure 7E).
La figure 7F illustre la dernière étape du dépilage et montre la fonction de la butée avant 358 et du pousseur arrière 359. Figure 7F illustrates the last step of unstacking and shows the function of the front stop 358 and the rear pusher 359.
Ainsi, le pousseur 359 est en position rétractée dans toutes les étapes illustrées aux figures 7A à 7E et en position étendue lors de l'étape illustrée à la figure 7F. Ceci permet de positionner le flan contre la butée avant 358 et d'assurer un bon positionnement du flan avant la dépose de l'adhésif. Thus, the pusher 359 is in the retracted position in all the steps illustrated in FIGS. 7A to 7E and in extended position during the step illustrated in FIG. 7F. This allows positioning the blank against the stop before 358 and to ensure proper positioning of the blank before the removal of the adhesive.
Il ressort de la description qui précède que les moyens de dépilage comporte un seul système de bras articulés 350, 352, contrairement à de nombreuses réalisations de l'état de la technique. Ceci permet de réduire considérablement l'encombrement à l'intérieur de la machine et donc de faciliter la maintenance et de limiter les risques d'accident pour les opérateurs. It follows from the foregoing description that the unstacking means comprises a single system of articulated arms 350, 352, unlike many embodiments of the state of the art. This considerably reduces the clutter inside the machine and therefore facilitates maintenance and reduces the risk of accidents for operators.
Le système de bras articulés 350, 352 peut être positionné dans la partie médiane de la machine ou légèrement décalé, comme illustré sur les figures 4 et 5. Il peut ainsi être situé sensiblement dans le tiers central de la machine. The articulated arm system 350, 352 can be positioned in the middle part of the machine or slightly offset, as illustrated in Figures 4 and 5. It can thus be located substantially in the central third of the machine.
De manière générale, le système de bras articulés est situé sensiblement dans l'alignement du mandrin 51 ou encore en regard du volet du flan destiné à venir sous le mandrin, lors de la formation d'une boîte .
Dans tous les cas, le système de bras articulés est suffisamment éloigné des bords de la machine pour assurer la sécurité des opérateurs. In general, the system of articulated arms is located substantially in alignment with the mandrel 51 or against the flap of the blank intended to come under the mandrel, during the formation of a box. In any case, the system of articulated arms is sufficiently far from the edges of the machine to ensure the safety of the operators.
Par ailleurs, le dépilage d'un flan est obtenu grâce à un mouvement semi-linéaire, lors de l'extraction depuis le magasin, complété par une rotation. Tous ces mouvements sont obtenus grâce à des pièces en rotation. In addition, unstacking of a blank is obtained by a semi-linear movement, during the extraction from the store, completed by a rotation. All these movements are obtained thanks to rotating parts.
Il convient encore de noter que le dispositif de dépilage permet de réduire le différentiel de hauteur entre le bas du magasin et la zone de dépose du poste d' encollage . It should also be noted that the unstacking device makes it possible to reduce the height differential between the bottom of the magazine and the removal zone of the gluing station.
Ceci est obtenu grâce au fait que l'axe de rotation de la barre 354 qui porte les moyens d'aspiration, n'est pas fixe comme c'est le cas par exemple dans un dispositif du type « Klik Klok ». En effet, cet axe de rotation est déterminé par les mouvements de la biellette 356. This is achieved by the fact that the axis of rotation of the bar 354 which carries the suction means is not fixed as is the case for example in a device of the "Klik Klok" type. Indeed, this axis of rotation is determined by the movements of the rod 356.
Il est maintenant fait référence à la figure 8 qui illustre de façon plus détaillée les moyens d'encollage 42 du module d'encollage 40, vus depuis le module 30 de stockage-dépilage . Reference is now made to FIG. 8 which illustrates in more detail the sizing means 42 of the sizing module 40, seen from the storage-unstacking module 30.
Ces moyens 42 comprennent ici un bras principal 420 monté en rotation autour d'un axe 421 solidaire du bâti 21 de la machine. These means 42 here comprise a main arm 420 rotatably mounted about an axis 421 integral with the frame 21 of the machine.
Ils comportent également un bras secondaire 422 monté en rotation sur le bras principal 420 autour de l'axe 423. They also comprise a secondary arm 422 rotatably mounted on the main arm 420 about the axis 423.
Ce bras secondaire supporte, à son extrémité opposée à l'axe 423, un support en L 424 pour une
buse 425. Le support 424 est articulé sur le bras secondaire 422 autour d'un axe 426. This secondary arm supports, at its end opposite the axis 423, an L-shaped support 424 for a nozzle 425. The support 424 is articulated on the secondary arm 422 about an axis 426.
Les étapes de dépose de l'adhésif sur le flan 1 vont maintenant être décrites en référence aux figures 9A à 9C. The steps of removing the adhesive on the blank 1 will now be described with reference to Figures 9A to 9C.
Ces figures représentent le flan en appui sur la table 41 (non illustrée sur ces figures) , vu depuis l'arrière de la machine, la languette 7 étant alors située à gauche. La face supérieure du flan, visible sur ces figures, n'est pas la face imprimée. These figures represent the blank resting on the table 41 (not shown in these figures), seen from the rear of the machine, the tongue 7 then being located on the left. The upper face of the blank, visible in these figures, is not the printed face.
A la figure 9A, le flan 1 est positionné sur la table 1 grâce aux taquets 410 illustrés sur la figure 3, en contact avec les bords transversaux 17 et 18 du flan 1 et par la butée avant 358 et le pousseur arrière 359 illustrés sur les figures 7A à 7F, en contact avec les bords transversaux 19 du flan. In FIG. 9A, the blank 1 is positioned on the table 1 thanks to the catches 410 illustrated in FIG. 3, in contact with the transverse edges 17 and 18 of the blank 1 and by the front stop 358 and the rear pusher 359 illustrated on the FIGS. FIGS. 7A to 7F, in contact with the transverse edges 19 of the blank.
Le flan 1 est immobile et les moyens d'encollage 42 sont commandés par un servomoteur de façon à positionner la buse entre les rabats 16d et 16c. The blank 1 is stationary and the sizing means 42 are controlled by a servomotor so as to position the nozzle between the flaps 16d and 16c.
Des moyens 42 sont alors commandés pour que la buse se déplace transversalement ou encore perpendiculairement à la direction d'amenée de flans, et dépose des lignes d'adhésif 427 sur le rabat 16c. Le résultat obtenu est illustré à la figure 9B . Means 42 are then controlled so that the nozzle moves transversely or perpendicularly to the blank feed direction, and deposits lines of adhesive 427 on the flap 16c. The result obtained is shown in Figure 9B.
Le mouvement de rotation du bras 420 autour de l'axe 421 et du bras 422 autour de l'axe 423 se poursuit de façon à continuer le déplacement transversal de la buse 425, celle-ci déposant des lignes de colle 428 sur le rabat 16a, comme l'illustre la figure 9C.
Ces rabats 16a et 16c correspondent aux rabats formant le fond de la boîte obtenue à partir du flan 1. The rotational movement of the arm 420 about the axis 421 and the arm 422 about the axis 423 continues so as to continue the transverse displacement of the nozzle 425, the latter depositing glue lines 428 on the flap 16a as shown in Figure 9C. These flaps 16a and 16c correspond to the flaps forming the bottom of the box obtained from the blank 1.
La figure 9D illustre une dernière étape du procédé d'encollage, dans laquelle les moyens 42 restent immobiles et le flan 1 est déplacé longitudinalement vers l'avant de la machine, comme cela sera décrit plus en détail en référence aux figures 10 et 11A à 11C. FIG. 9D illustrates a last step of the sizing process, in which the means 42 remain stationary and the blank 1 is moved longitudinally towards the front of the machine, as will be described in more detail with reference to FIGS. 10 and 11A to 11C.
C'est lors de ce déplacement longitudinal qu'une ligne d'adhésif 429 est déposée à proximité du bord libre du volet 3. It is during this longitudinal displacement that a line of adhesive 429 is deposited near the free edge of the flap 3.
En pratique, cette ligne d'adhésif 429 peut être déposée à environ 10 mm du bord libre du volet 3. In practice, this line of adhesive 429 may be deposited about 10 mm from the free edge of the shutter 3.
L'invention n'est pas limitée à ce mode de mise en œuvre et le trait d'adhésif 429 pourrait également être déposé sur la languette 7. The invention is not limited to this mode of implementation and the line of adhesive 429 could also be deposited on the tongue 7.
Ainsi, il ressort de la description qui précède que la dépose de l'adhésif s'effectue sur la face supérieure (non imprimée) du flan 1 et ce, pour toutes les lignes d'adhésif 427 à 429. De plus, le flan 1 est immobile lorsque l'adhésif est déposé sur les rabats latéraux, seule la ligne d'adhésif 429 étant déposée sur le volet 3 lors du déplacement longitudinal du flan. Thus, it is apparent from the foregoing description that the removal of the adhesive takes place on the upper face (not printed) of the blank 1 and this, for all the lines of adhesive 427 to 429. In addition, the blank 1 is stationary when the adhesive is deposited on the side flaps, only the line of adhesive 429 being deposited on the flap 3 during the longitudinal movement of the blank.
Il est maintenant fait référence à la figure 10 pour décrire les moyens de transfert 43 qui permettent le transfert d'un flan depuis le poste d'encollage vers le poste de formage.
Ces moyens comprennent un système de bras articulés qui est situé sous le niveau de la table 41, comme l'illustre par exemple la figure 3. Reference is now made to FIG. 10 to describe the transfer means 43 which allow the transfer of a blank from the sizing station to the forming station. These means comprise an articulated arm system which is located below the level of the table 41, as illustrated for example in FIG.
Ce système de bras articulés comprend une paire de bras principaux 430 reliés entre eux par deux axes 431 et 432, espacés l'un de l'autre. This articulated arm system comprises a pair of main arms 430 interconnected by two axes 431 and 432, spaced apart from each other.
Les bras principaux 430 sont montés en rotation autour de l'axe 431 qui est fixe par rapport au bâti 21. The main arms 430 are rotatably mounted about the axis 431 which is fixed relative to the frame 21.
Le système comporte également deux bras secondaires 433 qui sont montés, à l'une de leur extrémité, en rotation autour de l'axe 432. The system also comprises two secondary arms 433 which are mounted at one end, in rotation about the axis 432.
A leur extrémité opposée à celle montée en rotation sur l'axe 432, les bras secondaires 433 sont reliés entre eux par un axe 434 autour duquel deux moyens de support 435 sont montés en rotation, de façon à rester en position sensiblement verticale, quelle que soit la position des bras principaux et des bras secondaires. At their opposite end to that mounted in rotation on the axis 432, the secondary arms 433 are interconnected by an axis 434 around which two support means 435 are rotatably mounted, so as to remain in a substantially vertical position, whatever the position of the main arms and the secondary arms.
Ces moyens 435 sont conçus pour supporter des moyens d'aspiration 436 et leur structure comme leur fonctionnement seront décrits plus en détail en référence aux figures 11A à 11D. These means 435 are designed to support suction means 436 and their structure and operation will be described in more detail with reference to Figs. 11A-11D.
Le fonctionnement des moyens de transfert 43 va maintenant être décrit en référence aux figures 11A à 11D. The operation of the transfer means 43 will now be described with reference to Figs. 11A to 11D.
La figure 11A illustre très schématiquement le poste d'encollage avec le dispositif d'encollage 42 qui vient d'être décrit en référence aux figures 8 et 9A à 9D.
Un flan 1 est présent dans le poste d'encollage et les moyens d'encollage 42 terminent le dépôt des lignes d'adhésif 428 sur le rabat 16a. FIG. 11A very schematically illustrates the sizing station with the sizing device 42 which has just been described with reference to FIGS. 8 and 9A to 9D. A blank 1 is present in the sizing station and the sizing means 42 finish the deposition of the adhesive lines 428 on the flap 16a.
Les moyens de transfert sont alors dans une position telle que les moyens d'aspiration 436 sont situés sous le flan 1 et à l'écart de celui-ci. The transfer means are then in a position such that the suction means 436 are located under the blank 1 and away from it.
On voit sur la figure 11A que chaque moyen de support 435 comprend deux tiges montées de façon télescopique . It can be seen in FIG. 11A that each support means 435 comprises two rods telescopically mounted.
Les moyens d'aspiration 436 sont supportés par la tige interne 435a et sont mobiles en translation verticale dans la tige externe 435b, de chaque moyen de support. The suction means 436 are supported by the inner rod 435a and are movable in vertical translation in the outer rod 435b of each support means.
Dans la position illustrée à la figure 11A, la tige interne 435a est en position basse. In the position illustrated in Figure 11A, the inner rod 435a is in the down position.
La figure 11A illustre également schématiquement le poste de formage, en représentant seulement le mandrin 51. Fig. 11A also schematically illustrates the forming station, showing only the mandrel 51.
La figure 11B illustre l'étape suivante, les bras principaux 430 et secondaires 433 restant immobiles. FIG. 11B illustrates the next step, the main 430 and secondary arms 433 remaining stationary.
Lorsque les lignes d'adhésif 428 sont déposées sur le flan 1, les moyens de support 435 sont actionnés de façon à ce que leur tige intérieure 435a se déplace en direction de la face inférieure du flan et les moyens d'aspiration 436 viennent en contact avec cette dernière. When the lines of adhesive 428 are deposited on the blank 1, the support means 435 are actuated so that their inner rod 435a moves towards the underside of the blank and the suction means 436 come into contact with this last.
Les moyens d'aspiration 436 sont alors actionnés pour saisir le flan 1. The suction means 436 are then actuated to grip the blank 1.
La figure 11B illustre l'étape suivante dans laquelle les moyens de transfert 43 sont commandés de façon à ce que les arbres principaux 430 tournent
autour de l'axe 431 dans le sens anti-horaire, alors que les bras secondaires 433 autour de l'axe 432 dans le sens horaire. FIG. 11B illustrates the next step in which the transfer means 43 are controlled so that the main shafts 430 rotate around the axis 431 in the counterclockwise direction, while the secondary arms 433 about the axis 432 clockwise.
Ce mouvement de bras principaux et secondaires permet d'assurer le transfert du flan 1 en direction du mandrin 51. This movement of main and secondary arms makes it possible to transfer the blank 1 towards the mandrel 51.
Cette étape correspond à celle illustrée à la figure 9D, au cours de laquelle la ligne d'adhésif 429 est déposée à proximité du bord libre du volet 3. This step corresponds to that illustrated in FIG. 9D, during which the adhesive line 429 is deposited near the free edge of the shutter 3.
Les bras principaux 430 poursuivent leur mouvement de rotation autour de l'axe 431, selon le sens inverse des aiguilles d'une montre, tandis que les bras secondaires 433 poursuivent leur mouvement de rotation autour de l'axe 432 dans le sens horaire. The main arms 430 continue their rotational movement about the axis 431, in a counterclockwise direction, while the secondary arms 433 continue their rotational movement about the axis 432 in the clockwise direction.
La figure 11D illustre la fin du mouvement du système de bras articulés 43, le flan 1 étant alors positionné sous le mandrin 51. FIG. 11D illustrates the end of the movement of the articulated arm system 43, the blank 1 being then positioned under the mandrel 51.
On comprend que le transfert du flan du poste d'encollage au poste de formage par le système de bras articulé 43 est extrêmement précis. Il permet donc de supprimer l'ensemble des guides qui doivent être présents dans des machines classiques dans lesquelles le transfert du flan s'effectue par exemple au moyen de doigts d' entraînement . Ceci permet également de supprimer la butée avant qui est prévue, dans les machines classiques, pour bien positionner le flan sous le mandrin. It is understood that the transfer of the blank of the sizing station to the forming station by the articulated arm system 43 is extremely accurate. It thus makes it possible to eliminate all the guides which must be present in conventional machines in which the transfer of the blank is carried out for example by means of driving fingers. This also eliminates the front stop which is provided in conventional machines to position the blank under the mandrel.
On va maintenant décrire le fonctionnement de la machine permettant la formation d'une boîte en référence aux figures.
A partir du magasin 31 de stockage de flans, on extrait un premier flan 1 grâce à un mouvement semi- linéaire et on le fait basculer à l'horizontale (voir figure 7A à 7B) . We will now describe the operation of the machine for forming a box with reference to the figures. From the blank storage magazine 31, a first blank 1 is extracted by semi-linear movement and is tilted horizontally (see FIGS. 7A to 7B).
On le lâche alors sur la table 41 (figure 7E) et on le positionne précisément sur la table 41 (figure 7G) . It is then dropped on the table 41 (Figure 7E) and positioned precisely on the table 41 (Figure 7G).
Le flan étant immobile, on dépose des lignes d'adhésif 427, 428 sur au moins deux rabats latéraux 16c et 16a, sur la face supérieure du flan, la face inférieure constituant la face imprimée du flan. The blank being stationary, adhesive lines 427, 428 are deposited on at least two lateral flaps 16c and 16a, on the upper face of the blank, the lower face constituting the printed face of the blank.
Le flan est ensuite transféré du poste d'encollage vers le poste de formage et l'on procède, lors de ce transfert, au dépôt de la ligne d'adhésif 429 à proximité du bord libre du volet 3 ou sur la languette 7. The blank is then transferred from the sizing station to the forming station and is carried out, during this transfer, the deposition of the adhesive line 429 near the free edge of the flap 3 or on the tongue 7.
Le flan 1 étant positionné sous le mandrin, on procède à son enroulement autour du mandrin, ici au moyen de deux nacelles 52 et 53. Cependant, ce formage peut être réalisé par tout moyen. A l'issue de l'étape de formage, le volet 3 est collé sur la languette 7 et les rabats latéraux 16a et 16c sont collés sur les rabats 16b et 16d pour former le fond de la boîte sur la face d'extrémité 510 du mandrin. Cette dernière est tournée du côté du module d'extraction 60. The blank 1 being positioned under the mandrel, it is wound around the mandrel, here by means of two nacelles 52 and 53. However, this forming can be achieved by any means. At the end of the forming step, the flap 3 is glued to the tongue 7 and the side flaps 16a and 16c are glued to the flaps 16b and 16d to form the bottom of the box on the end face 510 of the mandrel. The latter is turned on the side of the extraction module 60.
Celui-ci extrait, par tout moyen approprié, la boîte ainsi formée du mandrin 51, de façon à la déposer sur l'un ou l'autre des convoyeurs 62 ou 63.
La description qui précède s'applique également à la formation d'une partie de boîte, notamment un couvercle ou un fond. The latter extracts, by any appropriate means, the box thus formed from the mandrel 51, so as to deposit it on one or other of the conveyors 62 or 63. The above description also applies to the formation of a box part, in particular a lid or a bottom.
Bien entendu, ce procédé est mis en œuvre dans le cadre d'un formage successif et automatique de boîtes ou de parties de boîte, de telle sorte que flan n est encollé pendant le formage du flan n - 1. Of course, this method is implemented in the context of a successive and automatic forming of boxes or box parts, so that blank is glued during forming of the blank n-1.
Comme cela a été souligné au cours de la description, le module de stockage-dépilage 30 et le module 40 d'encollage des flans sont conçus pour que les déplacements du flan soient assurés par des mouvements de rotation, notamment par des systèmes de bras articulés, de façon à éviter la présence de moyens se déplaçant linéairement. En effet, de tels moyens sont des sources de jeu, ce qui génère de l'usure et de l'imprécision dans le positionnement. L' invention permet donc une plus grande précision, ce qui permet de supprimer les moyens de guidage ou de butée qui sont associés aux moyens de déplacement linéaire. As has been pointed out during the description, the storage-unstacking module 30 and the module 40 for gluing the blanks are designed so that the movements of the blank are ensured by rotational movements, in particular by articulated arm systems. , so as to avoid the presence of linearly moving means. Indeed, such means are sources of play, which generates wear and inaccuracy in positioning. The invention therefore allows greater precision, which eliminates the guiding or abutment means which are associated with the linear displacement means.
Comme il va de soi et comme il résulte également de ce qui précède, la présente invention n'est pas limitée aux modes de réalisation plus particulièrement décrits. Elle en embrasse au contraire toutes les variantes.
As is obvious and as also follows from the above, the present invention is not limited to the embodiments more particularly described. On the contrary, it embraces all variants.
Claims
1. Dispositif de dépilage d'un flan (1) de matière en feuille à partir d'un magasin (31) dans lequel les flans sont disposés en pile, ledit dispositif comprenant des moyens d'extraction par aspiration (355) du flan de ladite pile et un seul système de bras articulés (350, 352), pour déplacer en rotation chaque flan extrait du poste d'alimentation (30) et le déposer à plat. 1. Device for unstacking a blank (1) of sheet material from a magazine (31) in which the blanks are arranged in a stack, said device comprising extraction extraction means (355) of the blank of said stack and a single articulated arm system (350, 352) for rotating each blank taken from the feed station (30) and laying it flat.
2. Dispositif selon la revendication 1, caractérisé en ce que le système de bras articulés (350, 352) porte une barre (354) munie des moyens d'extraction par aspiration (355), cette barre s' étendant selon une direction transversale. 2. Device according to claim 1, characterized in that the articulated arm system (350, 352) carries a bar (354) provided with extraction extraction means (355), this bar extending in a transverse direction.
3. Dispositif selon la revendication 2, caractérisé en ce que le système de bras articulés (350, 352) comporte au moins un bras principal (350) monté en rotation autour d'un axe (351) fixe par rapport au bâti, un bras secondaire (352) monté en rotation autour dudit au moins un bras principal (350) et autour d'un support (357) de ladite barre et une biellette (356) montée en rotation sur le bras principal et sur ledit support (357) . 3. Device according to claim 2, characterized in that the articulated arm system (350, 352) comprises at least one main arm (350) rotatably mounted about an axis (351) fixed relative to the frame, an arm secondary member (352) rotatably mounted about said at least one main arm (350) and around a support (357) of said bar and a link (356) rotatably mounted on the main arm and on said support (357).
4. Procédé de dépilage d'un flan (1) de matière en feuille provenant d'un poste d'alimentation et étant destiné à être transféré, après dépilage et dépose sur le support d'un poste d'encollage, à un poste de formage pour obtenir une boîte ou partie de boîte à section polygonale, mis en œuvre avec le dispositif selon l'une des
revendications 1 à 3, procédé dans lequel le flan (1) est extrait par aspiration d'une pile de flans, disposés de façon inclinée par rapport audit support (41) du poste d'encollage, déplacé en rotation et libéré au poste d'encollage (40) pour être positionné à plat sur ledit support, support avec lequel il est en contact avec sa face inférieure. 4. A method of unstacking a blank (1) of sheet material from a feed station and being intended to be transferred, after unstacking and deposited on the support of a sizing station, at a station of forming to obtain a box or portion of box with polygonal section, implemented with the device according to one of Claims 1 to 3, in which the blank (1) is extracted by suction from a stack of blanks, arranged inclined with respect to said support (41) of the sizing station, rotated and released to the station of sizing (40) to be positioned flat on said support, support with which it is in contact with its underside.
5. Procédé de dépilage selon la revendication 4, dans lequel l'extraction dudit flan est réalisée selon une trajectoire semi-linéaire. 5. unstacking process according to claim 4, wherein the extraction of said blank is carried out in a semi-linear trajectory.
6. Procédé de formation d'une boîte ou d'une partie de boîte à section polygonale à partir d'un flan (1) de matière en feuille comportant une suite d'au moins trois volets (3 à 6) , à savoir deux volets extrêmes (3, 6) situés de part et d'autre d'au moins un volet intermédiaire (4, 5), lesdits volets étant reliés les uns aux autres par des lignes de pliage (8 à 10) parallèles et pourvus de rabats latéraux (13 ; 16a à 16d), reliés respectivement auxdits volets par des lignes de pliage (14) perpendiculaires aux lignes de pliage (8 à 10) reliant lesdits volets (3 à 6) , le bord libre d'un des volets extrêmes dudit ensemble de volets étant pourvu d'une languette (7) reliée audit volet extrême (6) par une ligne de pliage (11) parallèle aux lignes de pliage (8 à 10) reliant lesdits volets (3 à 6) , procédé selon lequel, dans un poste de formage (50), on forme le flanc (1) par enroulement des volets (3 à 6) autour d'un mandrin (51) à section polygonale dont la section transversale externe correspond à la section transversale interne de la boîte ou de la partie de
boîte à obtenir, caractérisé en ce que le flanc (1) est préalablement dépilé dans un poste de dépilage (30), en mettant en œuvre le procédé de dépilage selon l'une des revendications 4 ou 5. A method of forming a box or box portion with a polygonal section from a blank (1) of sheet material having a sequence of at least three flaps (3 to 6), namely two end flaps (3, 6) located on either side of at least one intermediate flap (4, 5), said flaps being connected to each other by parallel fold lines (8 to 10) provided with flaps lateral (13; 16a to 16d), respectively connected to said flaps by fold lines (14) perpendicular to the fold lines (8 to 10) connecting said flaps (3 to 6), the free edge of one of the extreme flaps of said set of flaps being provided with a tongue (7) connected to said end flap (6) by a fold line (11) parallel to the fold lines (8 to 10) connecting said flaps (3 to 6), according to which method, in a forming station (50), the flank (1) is formed by winding the flaps (3 to 6) around a mandrel (51) with a polygonal cross section whose external cross section corresponds to the internal cross section of the box or part of box to obtain, characterized in that the sidewall (1) is previously depilated in an unstacking station (30), implementing the unstacking method according to one of claims 4 or 5.
7. Procédé selon la revendication 6, dans lequel un adhésif est déposé d'une part, sur deux rabats latéraux (16a, 16c) et d'autre part, sur ladite languette (7) d'un volet extrême ou à proximité du bord libre (18) du volet extrême (3) opposé à ladite languette (7), caractérisé en ce que le flan (1) étant positionné à plat sur un support (41) d'un poste d'encollage (40), le dépôt de l'adhésif est réalisé sur la face supérieure desdits au moins deux rabats latéraux (16a, 16c) et de ladite languette (7) ou du volet extrême (3) opposé à ladite languette . 7. The method of claim 6, wherein an adhesive is deposited on the one hand, on two side flaps (16a, 16c) and on the other hand, on said tab (7) of an end flap or near the edge. free (18) of the end flap (3) opposite said tongue (7), characterized in that the blank (1) being positioned flat on a support (41) of a sizing station (40), the deposit adhesive is made on the upper face of said at least two side flaps (16a, 16c) and said tongue (7) or the end flap (3) opposite said tongue.
8. Procédé selon la revendication 7, caractérisé en ce que le dépôt de l'adhésif est réalisé au moyen d'au moins une buse (425) associée à des moyens de déplacement. 8. Method according to claim 7, characterized in that the deposition of the adhesive is achieved by means of at least one nozzle (425) associated with displacement means.
9. Procédé selon la revendication 8, caractérisé en ce que les moyens de déplacement (42) de ladite au moins une buse comprennent au moins un bras articulé (420, 422) . 9. The method of claim 8, characterized in that the displacement means (42) of said at least one nozzle comprise at least one articulated arm (420, 422).
10. Procédé selon la revendication 8 ou 9, caractérisé en ce que le dépôt de l'adhésif sur lesdits rabats (16a, 16c) est réalisé alors que le flan (1) est immobile et ladite au moins une buse (425) en mouvement, grâce auxdits moyens de déplacement.
10. The method of claim 8 or 9, characterized in that the deposition of the adhesive on said flaps (16a, 16c) is performed while the blank (1) is immobile and said at least one nozzle (425) in motion , thanks to said moving means.
11. Procédé selon l'une des revendications 8 à 10, caractérisé en ce que le dépôt d'adhésif, sur ladite languette (7) ou le volet extrême (3) opposé à ladite languette, est réalisé lorsque le flan est déplacé selon un mouvement linéaire vers le poste de formage (50), ladite buse (425) étant immobile. 11. Method according to one of claims 8 to 10, characterized in that the deposition of adhesive on said tongue (7) or the end flap (3) opposite said tongue, is performed when the blank is moved in a manner. linear motion to the forming station (50), said nozzle (425) being stationary.
12. Procédé selon l'une des revendications 6 à 11, caractérisé en ce que le flan (1) est saisi par des moyens d'aspiration (355) et déplacé du poste d'encollage (40) au poste de formage (50) par un mouvement de translation desdits moyens d'aspiration (355) de direction parallèle aux lignes de pliage (8 à 10) entre les volets du flan. 12. Method according to one of claims 6 to 11, characterized in that the blank (1) is gripped by suction means (355) and moved from the sizing station (40) to the forming station (50) by a translation movement of said suction means (355) of direction parallel to the fold lines (8 to 10) between the flaps of the blank.
13. Procédé de formage successif automatique de boîtes ou de parties de boîte mettant en œuvre un procédé selon l'une quelconque des revendications 6 à 12, caractérisé en ce que l'on encolle le flan n pendant le formage du flan n - 1. 13. A method of automatically forming successive boxes or box parts implementing a method according to any one of claims 6 to 12, characterized in that the flan n is glued during the forming of the blank n - 1.
14. Machine de formation d'une boîte ou d'une partie de boîte à section polygonale comprenant un magasin (31) dans lequel les flans sont disposés en pile, et un poste de stockage-dépilage (30) avec un dispositif de dépilage selon l'une des revendications 1 à 3, un poste d'encollage avec un support (41) pour ledit flan et un poste de formage 14. Machine for forming a box or part of a box with a polygonal section comprising a magazine (31) in which the blanks are arranged in a stack, and a storage-unstacking station (30) with an unstacking device according to one of claims 1 to 3, a sizing station with a support (41) for said blank and a forming station
(50) dans lequel est réalisé l'enroulement du flan(50) in which is made the winding of the blank
(1) autour d'un mandrin (51) . (1) around a mandrel (51).
15. Machine selon la revendication 14, caractérisé en ce que, dans le magasin (31), les flans sont disposés de façon inclinée par rapport au support (41) du poste d'encollage (40).
15. Machine according to claim 14, characterized in that, in the magazine (31), the blanks are arranged in an inclined manner with respect to the support (41) of the sizing station (40).
16. Machine selon les revendications 14 ou 15, caractérisée en ce que le poste d'encollage comprend également : Machine according to claims 14 or 15, characterized in that the sizing station also comprises:
- une buse (425) susceptible de délivrer un adhésif, positionnée au-dessus du support et associée à des moyens de déplacement (42) et a nozzle (425) capable of delivering an adhesive, positioned above the support and associated with displacement means (42) and
- des moyens de commande desdits moyens de déplacement pour assurer le dépôt d'adhésif sur lesdits rabats (16a, 16c) et ladite languette (7) ou ledit volet extrême (3) opposé à ladite languette. - Control means of said moving means for depositing adhesive on said flaps (16a, 16c) and said tongue (7) or said end flap (3) opposite to said tongue.
17. Machine selon la revendication 16, caractérisée en ce que le poste d'encollage comprend des moyens de calage du flan (358, 359) sur ledit support (41), dans une position de référence. 17. Machine according to claim 16, characterized in that the sizing station comprises means for setting the blank (358, 359) on said support (41) in a reference position.
18. Machine selon l'une des revendications 18. Machine according to one of the claims
15 à 17, caractérisée en ce que le flan (1) est déplacé du poste d'encollage (40) au poste de formage (50) par un système de bras articulés (430, 433), situé sous le support (41). 15 to 17, characterized in that the blank (1) is moved from the sizing station (40) to the forming station (50) by a system of articulated arms (430, 433), located under the support (41).
19. Machine selon la revendication 18, caractérisée en ce que le système de bras articulés (430, 433) est associé à des moyens de solidarisation du flan (436) , notamment par aspiration .
19. Machine according to claim 18, characterized in that the system of articulated arms (430, 433) is associated with means for securing the blank (436), in particular by suction.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1659823A FR3057203B1 (en) | 2016-10-11 | 2016-10-11 | METHOD AND DEVICE FOR BONDING A BLANKET. |
FR1659823 | 2016-10-11 |
Publications (2)
Publication Number | Publication Date |
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WO2018069647A2 true WO2018069647A2 (en) | 2018-04-19 |
WO2018069647A3 WO2018069647A3 (en) | 2018-06-14 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/FR2017/052800 WO2018069647A2 (en) | 2016-10-11 | 2017-10-11 | Method and device for removing a blank from a stack |
Country Status (2)
Country | Link |
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FR (1) | FR3057203B1 (en) |
WO (1) | WO2018069647A2 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0334707A1 (en) | 1988-03-22 | 1989-09-27 | Otor | Method and machine for the production of polygonal boxes from sheet material and boxes obtained thereby |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5024709A (en) * | 1990-01-22 | 1991-06-18 | Slautterback Corporation | Contact-free method of forming sift-proof seals |
FR2665137B1 (en) * | 1990-07-24 | 1994-07-01 | Otor Sa | CRATES IN A SHEET MATERIAL, BLANKS AND MACHINE FOR THE PRODUCTION OF SUCH CRATES. |
FR2767282B1 (en) * | 1997-08-12 | 1999-10-29 | Jean Claude Serre | METHOD AND MACHINE FOR MOUNTING A BOX WITH POLYGONAL SECTION FROM A CORRUGATED CARDBOARD CUT |
DE10328891A1 (en) * | 2003-06-26 | 2005-01-20 | Hulverscheidt, Anna Madeleine | Method for the production of blanks from cardboard and apparatus for carrying out the method |
ITBO20060123A1 (en) * | 2006-02-20 | 2007-08-21 | Marchesini Group Spa | METHOD FOR WITHDRAWAL OF PUNCHED TUBULARS ATTACHED BY A WAREHOUSE AND FOR THEIR MOVEMENT TO A VOLUME STATION AND EQUIPMENT THAT OPERATES THIS METHOD. |
US9409367B2 (en) * | 2010-10-26 | 2016-08-09 | Westrock Shared Services, Llc | Machine for forming multiple types of containers |
US9878512B2 (en) * | 2013-09-06 | 2018-01-30 | Westrock Shared Services, Llc | Methods and machine for forming a shipping and display container from a blank assembly using a pre-fold mandrel section |
DE102014105794B4 (en) * | 2014-04-24 | 2018-06-21 | Baumer Hhs Gmbh | packing method |
-
2016
- 2016-10-11 FR FR1659823A patent/FR3057203B1/en not_active Expired - Fee Related
-
2017
- 2017-10-11 WO PCT/FR2017/052800 patent/WO2018069647A2/en active Application Filing
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0334707A1 (en) | 1988-03-22 | 1989-09-27 | Otor | Method and machine for the production of polygonal boxes from sheet material and boxes obtained thereby |
Also Published As
Publication number | Publication date |
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FR3057203B1 (en) | 2021-11-19 |
WO2018069647A3 (en) | 2018-06-14 |
FR3057203A1 (en) | 2018-04-13 |
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