EP1897813A2 - Contact for recyclable pallet, device for producing these contacts and associated application device - Google Patents

Abstract

The block has flaps (12-1-12-3) that are folded face to face and connected with each other along an axis (X-X), where the block is formed of a unique blank that is made of corrugated carton. Each flap has a length (L) and a width (I). The flaps are extended by closing flaps (16, 20), and a base flap (18). The flaps (16, 18, 20) form a U- shaped part in which the folded flaps are placed. The folded flaps are connected by connections (14). The flap (16) is connected to the flap (18) by a grooving type connection. Independent claims are also included for the following: (1) a device for manufacturing a block made of corrugated carton (2) a pallet comprising blocks (3) a device for installing and bonding blocks.

Description

The present invention relates to a pad for recyclable pallet.

The invention also covers the device for manufacturing these pads.

The invention also covers the laying device for these pads to produce pallets ready for use.

A patent application is known French N ° FR-2.874.594 in the name of the same holder concerning a handling pallet, mixed, with recyclable and reusable elements.

This palette provides the possibility of using wooden blocks, especially reconstituted wood, associated with two plates of specific corrugated cardboard, load support.

This arrangement is very interesting because the pads are reusable and the plates are recyclable, the materials used are fully adapted to withstand the mechanical stresses generated by the load and the manufacturing is fully industrializable.

If the market demand exists for this type of pallet, it turned out that the problem lies mainly in the stud which is one of the essential elements of a palette.

In the case of a pallet all cardboard to make it completely recyclable, in a nature of single material, the corrugated cardboard, it must be possible to have a pad of corrugated cardboard having the necessary characteristics.

Pallets comprising a corrugated board loading surface and corrugated board pads are known.

Nevertheless, it is also necessary to optimize the design of these types of pallets, in particular by making pads having dimensional parameters and mechanical strength sufficient to allow them to be arranged instead of wooden studs.

In addition, such a pad must also be of identical cost, or even less cost than that of a wooden pad, which necessarily implies a mechanizable manufacture from corrugated cardboard plates, raw, out of the box. corrugator, commonly used for the transformation of this material.

There is also another need for corrugated board pads for wooden pallets. This is due to two main reasons: on the one hand a shortage of wooden blocks and on the other hand the weight of wooden blocks which leads to heavy pallets which penalizes them.

The invention covers a corrugated pad, adapted to various configurations.

The invention also covers the device for producing the pads and the device for placing the pads thus made on corrugated cardboard plates to obtain a type of pallet, finalized, ready for use.

The invention also covers an arrangement of a wooden pallet with corrugated cardboard pads.

The arrangement of a pad according to the invention is now described as well as the two associated devices.

• figure 1 : une vue d'un flan permettant la réalisation du plot selon l'invention,
• figures 2A à 2C : trois vues d'un synoptique de réalisation de ce plot,
• figure 3: une vue du plot fini,
• figure 4 : une vue schématique d'un dispositif de réalisation de plots tels que celui de la figure 3,
• figure 5 : une vue en éclaté d'une palette tout carton équipée de plots selon l'invention,
• figure 6 : une vue schématique en élévation latérale d'un dispositif de pose de plots de la figure 3 et de réalisation d'une palette tout carton,
• figure 7 : une vue schématique en coupe transversale du dispositif de pose de plots de la figure 3,
• figure 8 : une vue schématique de dessus du dispositif de pose de plots de la figure 3,
• figure 9 : une vue d'une palette en bois avec des plots en carton selon l'invention,
• figure 10 : une vue en perspective d'une variante de réalisation de palette équipée partiellement de plots selon la présente invention,
• figure 11 : une vue de détail d'un flan destiné à la réalisation d'un ski destiné à recevoir des plots pour la palette de la figure 10,
• figure 12 : une vue en perspective d'un ski prêt à recevoir des plots selon l'invention,
• figure 13 : une vue de dessous de la palette de la figure 10, avant pose des plots, et
• figure 14 : une vue de dessus de la palette de la figure 10, avant pose des plots.

This description is made with reference to the appended drawings, according to a particular, nonlimiting embodiment, the various figures representing:

• FIG. 1: a view of a blank allowing the realization of the pad according to the invention,
• FIGS. 2A to 2C: three views of a block diagram of this plot,
• FIG. 3: a view of the finished block,
• FIG. 4: a schematic view of a device for producing pads such as that of FIG. 3,
• FIG. 5 is an exploded view of an all-board pallet equipped with pads according to the invention;
• FIG. 6 is a diagrammatic view in side elevation of a device for placing pads of FIG. 3 and for producing an all-cardboard pallet;
• FIG. 7 is a diagrammatic cross-sectional view of the padding device of FIG.
• FIG. 8 is a diagrammatic view from above of the padding device of FIG. 3,
• FIG. 9: a view of a wooden pallet with cardboard pads according to the invention,
• FIG. 10 is a perspective view of an embodiment of a pallet partially equipped with pads according to the present invention;
• FIG. 11 is a detailed view of a blank intended for producing a ski intended to receive studs for the pallet of FIG. 10,
• FIG. 12: a perspective view of a ski ready to receive studs according to the invention,
• FIG. 13 is a view from below of the pallet of FIG. 10, before laying the pads, and
• Figure 14: a top view of the pallet of Figure 10, before laying the pads.

The blank 10 for producing a pad P is cut from corrugated cardboard, for example double / double corrugated cardboard comprising a first groove of 5.9mm in 145g, and a second groove of 3.9mm in 110g with two 140g kraft paper covers leading to a thickness of 10mm.

This blank 10 comprises n flaps 12-1, 12-2, ...., 12-n linked to each other along an axis XX ' . In the present case, in the representation of FIG. 1, this blank comprises 6 shutters. Each flap has a length L along the axis XX ' and a width I.

The flaps comprise between them links 14 of the "slitte" type inverted every other time so as to make a collapsible portion accordion.

The bonds of the type "slit" consist of cutting all the layers of the corrugated cardboard except one of the covers so as to allow a hinge effect and a perfect setting back to back of two successive parts.

This set of flaps is extended on one side, always along the axis XX ' , by a first flap 16 cover, a flap 18 base and a second flap 20 cover.

The first cover flap 16 is connected to the flap 18 base which is juxtaposed with a connection 22 of the raining type, that is to say with a marking by crushing of the groove, which allows and facilitates a folding along this connection, subject to compliance with a bending angle limited to about 90 °, beyond a cut with attachment points would be necessary.

Similarly, the second cover flap 20 is also connected to the flap 18 base by a connection 24 of the raining type.

This also makes it possible to retain the entirety of the mechanical strength, in particular to traction.

FIGS. 2A to 2C show a block diagram illustrating the successive folding phases of the blank 10 to obtain a pad P.

In FIG. 2A, the flaps 12-1, 12-2 are folded face-to-face around the link 14 of the inverted slit type which allows this folding to be 180 °.

In this same Figure 2A, the following flaps are also folded face against face to the link 14. This provides a parallelepiped.

In Figure 2B, the folding of the blank is completed before folding the first shutter 16.

In Figure 2C, the folding of the blank is completed by folding 90 ° around the connection 22 of the raining type, the flap 18 base which is pressed against the folds of all the flaps.

The folding of the blank is finalized by folding in turn 90 ° around the link 24, the second shutter 20 closing.

It can be seen that the pad thus obtained, also represented in FIG. 3, comprises a U- shaped envelope composed of the first closure flap 16, the base flap 18 and the second closure flap 20.

It will be recalled that these three elements are bound together by the totality of the sheets constituting the corrugated cardboard since the connection, of the raining type, does not generate any cut, which makes it possible to preserve suitable mechanical properties.

Within this U- shaped envelope, there is a succession of flaps, folds resulting from folding thanks to the inverted slits being supported on the inner face of the flap 18 base.

At the right of the opening of this U- shaped envelope, the juxtaposed folds also form a surface S , the upper face of the parallelepiped, particularly visible in this FIG.

It is noted that the flaps which form the branches of the U have a slightly longer length than the other flaps so as to take into account the thickness of the flap 18 base. The corresponding slices of these shutters complete the surface 5.

The pad P thus produced is intended to come into contact with the ground via the outer face of the base flap 18 while the surface S is intended to be attached by gluing as explained below in the case of producing a pallet all cardboard.

FIG. 4 diagrammatically shows a device making it possible to produce pads as represented in FIGS. 1 to 3.

There is shown a feed station 26 which comprises a feeder 28 with a stack of blanks 10 or plates constituting blank multiples.

In the case of pre-cut blanks, pusher means of these blanks one by one are provided, the second one pushes first and so on. The blanks are in this case pre-cut, slit, ready to bend.

In the case of slabs in situ, they are slit, slit and drawn by means of a suitable tool arranged upstream in a complementary manner, which allows to easily vary the dimensions of the pads.

It is also advisable to provide, in this case, means for making the slits and the ups and downs.

This arrangement allows a greater flexibility of work with very fast variations of dimensions of the pads according to the demand, this on the same station.

The single or complete supply station 26 is followed by a flap folding station 32 comprising, in one embodiment, folding aid bars B or folding shafts, of known type, inclined upwards and downwards. alternately bottom and converging at an angle adapted to initiate bending and extend, only the reference R being in the output alignment ZZ ' .

As schematically shown, a specific guiding slide 34 ensures the recovery of the first closure flap 16 which serves as a reference plane.

The base flap 18 and the second closure flap 20 align vertically in the same reference plane.

The device further comprises a finishing station 36, positioned immediately at the exit of the folding station, which comprises a jack 38 which plates the various successive flaps.

The shutter 18 base is simultaneously folded under the shutters and plated.

The inner face of the second closure flap 20 is glued in particular with a glue by any suitable means known.

A recovery of the stud is performed from above by means of a jack 40 to a conveyor 42 which raises and ensures the plating of the first closure flap 20 glued against the flap vis-à-vis during the opening time of the glue.

The length of the conveyor corresponds to the setting time of the glue.

The pad P thus obtained is therefore entirely made of corrugated cardboard.

This pad P is particularly adapted to be associated in multiple ways with corrugated sheets to form a pallet.

This pallet is shown in Figure 5, in its best embodiment and comprises two lower sheets 44 and upper 46 of corrugated cardboard.

The lower sheet 44 has openings 48 for generating flanges 50.

The peripheral edges 52 of this bottom sheet are folded upwards to position the future load. In each of these edges are also cut flasks 50.

The flanges 50, in the example shown, are 9 in number thus generating 9 housings provided to each receive a pad P.

The upper sheet 46 is a solid sheet which is superimposed on the lower sheet 44 so as to provide a continuous surface for the future charge and to increase the mechanical properties.

The pads P must be reported on the underside of the upper sheet 46 and through the lower sheet 44 with the interposition of glue, the flanges 50 must be spaced and folded against the outer faces of the first and second closure flaps constituting the branches of the U there too with interposition of glue.

• d'une part par le dessus contre la face inférieure de la feuille 46 supérieure sur une surface égale sensiblement à la surface S, et
• d'autre part latéralement aux flasques 50 de la feuille 44 inférieure.

Also each plot is pasted:

• on the one hand from above against the lower face of the upper sheet 46 on a surface substantially equal to the surface S , and
• on the other hand laterally to the flanges 50 of the lower sheet 44.

This arrangement frees the passage of the forks of the handling equipment while ensuring excellent subjection of each stud on the sheets.

Thus, the loaded pallet is based on its studs which themselves are oriented with the flap 18 base flat on the ground and held in this position by the flanges 50. Keeping the studs secured and properly oriented allows to benefit from the all of the mechanical properties of said pads.

The present invention also proposes a device for positioning the pads on the corrugated sheets for producing pallets.

The following description is carried out indifferently with reference to FIGS. 6, 7 or 8. This description relates to a device for producing pallets with 9 pads, made entirely of corrugated cardboard, able to work with the different standard dimensions.

This device comprises a frame 54 equipped with a supply station 56 in lower sheets 44 of corrugated cardboard having previously been pre-cut and thus comprising flanges 50. These flanges are retained in the plane of the sheet to allow stacking.

The feed station 56 is equipped with a set of cardboard clamps, linked to means 58 for translational movement of the clamps of said set.

The pads P are also made with the device described above and the feed station 56 comprises three chutes 60 distribution of these pads, by gravity. The end of each chute is carried by a movable distribution head 62 to position the distributed pads at the required locations depending on the type of pallet and dimensions.

The frame 54 also supports a station 63 for bonding and clamping these pads. This station 63 comprises three bonding heads 64 each provided with nozzles 66 for dispensing glue onto the flanges 50. The bonding heads 64 are integral with translation movement means 66 according to the type of pallet.

This station also comprises three lower clamping heads 68, also movable in translation, by means 70 for driving so as to adapt to the type of pallet.

These lower clamping heads comprise fingers 72, movable in rotation, able to lift the glued flanges, to rotate and to press against the previously positioned studs.

The frame 54 supports a transfer station 74 for a resumption and to transfer this assembly, the lower sheet 44 equipped with glued pads P , to a laminating station of the upper sheet 46 on the lower sheet 44 so as to obtain a pallet ready in use.

The pallet thus obtained is perfectly recyclable because made entirely of corrugated cardboard. This pallet is simple to manufacture, generates very few drops, has mechanical strength properties equivalent to those of a wooden pallet and its manufacture is perfectly industrializable.

The cardboard pad according to the present invention is also applicable to the production of mixed pallets wood / cardboard.

In the case of a wood pallet, the load bearing surface is made of wood and the feet 54 are composed of corrugated cardboard pads according to the invention, sandwiched between two strips 76 of wood. In the case of a standard paddle with 9 pads, there are 3 feet 78 with 3 pads, as shown in FIG. 9.

The two blades 76 of wood are tightened by links 80 of the strapping type, immobilizing the studs. Preferably, there are provided three or six strapping, one or two to the right of each stud.

These strapping are extremely easy to perform, simultaneously, and on the same station.

Then simply bring these feet on the load support surface.

Such a pallet is thus much lighter and remains composed of perfectly recyclable materials.

We also note that the strapping is very simple to eliminate, which facilitates the recycling and separation of materials.

According to the present invention, it is also possible to make a pallet all cardboard and simplified in its constitution.

Thus, in FIG. 10, there is the pallet 82 comprising skis 84, of which there are three skis in the chosen embodiment. These skis are parallel as the feet 54 in the previous embodiment.

Each ski includes three pads P.

Each ski 84 is preferably made from a blank as shown in FIG. 11. This blank has its surface divided into two plates 86-1 and 86-2 carrying a double longitudinal slitting 88 so as to allow folding. despite the thickness of the cardboard. On both sides of this double slitting, there is also provided a creasing 90 so as to allow folding.

One of the plates 86-1 has cutouts 92-1 oriented to form longitudinal flaps 94-1.

The other of the plates 86-2 comprises, symmetrically, cutouts 92-2 oriented to form transverse flaps 94-2.

In Figure 12 which shows the ski mounted, the plates 86-1 were folded and glued against the plate 86-2, one against the other, the two slits allowing a fold face to face.

The cuts 92-1 and 92-2 are found strictly superimposed, the transverse flaps 94-2 can therefore be folded down.

The longitudinal flaps 94-1 pass through the cuts 92-2 of the transverse flaps and are folded down. The height of projecting under the plate 86-2 is lower than that of the transverse flaps.

At the right of each pair of cuts 92-1 / 92-2, there are four flaps surrounding the cut.

Each ski also comprises a flap 96 consisting of two zones on either side of the double slit, glued together.

The pallet 82 comprises two sheets 98 of corrugated cardboard, supported by the three skis 84 as is particularly visible in FIGS. 13 and 14.

The two side skis 84 are positioned so that the flaps 96 remain external. These flaps 96 are designed to be folded against the load and protect it from possible damage to the stowage of this load on said pallet.

The pallet thus produced can now be equipped with pads P.

Thus, each stud takes place in each housing consisting of flaps 94-1 and 94-2.

Each pad P is adhered by its upper face directly on the respective sheets 98 when they are arranged under one of these sheets and on the four flaps 94-1 and 94-2.

For the central ski, the pads P are only glued on the four shutters.

This fully cardboard pallet is immediately recyclable, it is achievable by cutting from reduced surface sheets, it requires a limited amount of material.

Claims (10)

Plot intended to be attached to a pallet, characterized in that it has come to fold from a single blank (10) of corrugated cardboard comprising flaps (12-1, 12-2 .... 12-n ) folded face against face, and a first shutter (16), a flap (18) base and a second (20) closure flap so as to form a U in which are disposed said folded flaps. Plot according to claim 1, characterized in that the links (14) between the flaps (12-1, 12-2 .... 12-n) are slit type. Plot according to claim 1 or 2, characterized in that the links (22,24) between the first shutter (16) and the shutter (18) base on the one hand and between the flap (18) base and the second shutter (20) on the other hand are of the raining type. Plot according to any one of the preceding claims, characterized in that the length of the first and second flaps (16,20) closure takes into account the thickness of the flap (18) base so that their sections form with the sections of the shutters (12-1, 12-2 .... 12-n) a surface S of gluing. Device for producing a corrugated cardboard pad P , according to any one of the preceding claims, characterized in that it comprises a feed station (26), a flap folding aid station (32) comprising folding bars B or push-up shafts, inclined upwards and downwards alternately and converging at an angle suitable for initiating the folds and extending them, a slideway (34) for guiding the straightening of the first shutter (16). ), a finishing station (36) positioned immediately at the exit of the folding station comprising a jack (38) which plates the various successive flaps, a cylinder (40) for taking up the stud, a conveyor (42) which reports and ensures the plating of the second shutter (20) closing against the shutter vis-à-vis. Pallet entirely of corrugated board, equipped with pads P according to one of claims 1 to 4, characterized in that it comprises two corrugated sheets, the first sheet (46) being upper solid and the second sheet (44) lower comprising flanges (50) cut and intended to be connected to the pads P by gluing. Pallet (82) entirely of corrugated cardboard, equipped with pads P according to one of claims 1 to 4, characterized in that it comprises skis (84) provided with longitudinal flaps (94-1) and transverse flaps (94-2 ) intended to be reported by gluing on said pads and at least one sheet (98) for connecting said skis. Pallet (82) according to claim 7, characterized in that each ski (84) comprises flaps (96). Pallet (82) according to claim 7 or 8, characterized in that each ski (84) came from folding and gluing from a blank comprising two plates (86-1) and (86-2) separated by a double longitudinally slit (88), one of the plates (86-1) has cutouts (92-1) oriented to form longitudinal flaps (94-1) and the other of the plates (86-2) comprises, symmetrical cutouts (92-2) oriented to constitute flaps (94-2 transverse), so that the cuts (92-1, 92-2) are found strictly superimposed, the transverse flaps (94-2) being folded down downwards and the longitudinal flaps (94-1) being folded down through the cutouts (92-2) transverse flaps. Device for placing and bonding pads P according to one of claims 1 to 4 on a pallet according to claim 6, characterized in that it comprises a frame (54) equipped with a feed station (56) in lower sheets (44) of corrugated cardboard including flanges (50), this post feeding device (56) being equipped with a set of cardboard grippers and plinth distribution channels (60), the end of each chute being carried by a distribution head (62), a gluing station (63) and clamping the studs, gluing heads (64) each provided with glue dispensing nozzles (66) on the flanges (50), lower clamping heads (68) comprising rotatable fingers (72), able to lift the glued flanges, to rotate them and to press them against the previously positioned studs P.

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