EP3858759A1 - Device for wedging an object comprising a stack of cellular cardboard panels - Google Patents

Abstract

The invention relates to a device (1) for wedging an object comprising a stack of at least three panels (10, 20, 30) of assembled honeycomb cardboard, each panel comprising two parallel outer sheets of paper between which extend. a plurality of sheets of paper erected perpendicular or substantially perpendicular to the two outer sheets, the panels being assembled superimposed on the side of their outer sheets, and in which at least one panel of honeycomb board defines at least one housing (24) for receiving an object leading to at least one of its outer leaves.

Description

The subject of the invention is an object wedging device comprising a stack of honeycomb cardboard panels.

The transport of an object requires the use of wedging devices in order to avoid deterioration of the transported object. Currently, the wedging devices are made of polystyrene which has the advantage of being light, easy to mold and not very abrasive. As environmental concerns become more and more important, manufacturers are seeking to replace this material with another more ecological material. Certain molded cellulose wedging devices have thus been developed. This material, which is essentially made from recycled paper and water, nevertheless has the drawback of being heavy, difficult to mold into complex shapes, abrasive and generates dust. In addition, it does not absorb shocks well and the existing production capacity is insufficient to cover the needs of the market. It is also possible to use crumpled paper, but this does not always provide good cushioning for the most fragile objects.

Honeycomb cardboard wedging devices are also known. The latter is formed of two parallel sheets of paper between which stand a plurality of sheets of paper substantially perpendicular to the two parallel sheets of paper. The cellular board, although relatively bulky, has good impact resistance in a direction perpendicular to the two parallel sheets but much lower impact resistance in a parallel direction. A sheet of honeycomb cardboard can be stamped (crushed) perpendicular to the planes of the parallel sheets of paper in order to accommodate an object. This stamping makes the cellular board resilient, promoting shock absorption, but decreases the overall strength of the cellular board. It is also necessary to protect the objects to be wedged against abrasion, in particular when it is in contact with the edges of a recessed or stamped part of a cellular cardboard plate.

Finally, corrugated cardboard can also be used, but its impact resistance and shock absorption capacity are relatively limited. In addition, its edges are abrasive, requiring additional protection for the object to be wedged.

The invention aims to resolve all or part of the aforementioned drawbacks.

To this end, a first object of the invention relates to a device for wedging an object comprising a stack of at least three assembled honeycomb cardboard panels, each panel comprising two parallel outer sheets of paper between which a plurality extend. sheets of paper erected perpendicular or substantially perpendicular to the two outer sheets, the panels being assembled superimposed on the side of their outer sheets, and in which at least one cellular cardboard panel defines at least one housing for receiving an object opening onto at least one of its outer leaves.

This arrangement makes it possible to produce a resistant wedging device for receiving an object.

Advantageously, for better protection, the wedging device may comprise a stack of at least four panels of honeycomb cardboard superimposed and assembled, at least one of which defines at least one housing opening onto at least one of its outer sheets.

Advantageously, each housing can be chosen from a housing produced by stamping and a housing produced by cutting.

Advantageously, in order to make it possible to accommodate objects of large dimensions, at least one panel can have at least one housing communicating with a housing of an adjacent panel.

Advantageously, the panels of the stack can be of the same shapes and dimensions, at least in a plane parallel to their outer sheets. In one embodiment, two adjacent panels of the stack may be connected to each other by an edge of their facing outer sheets, these connections between the panels being located alternately on opposite sides of the stack. the stack or alternatively on adjacent sides of the stack. In other words, the panels of the stack can be either connected to each other alternately on either side of the stack, or connected to each other alternately on adjacent sides of the stack. Such an arrangement makes it possible to facilitate the mounting of the wedging device with a good positioning of the panels.

In a variant that is particularly easy to implement, these connections between the panels can be produced by fold lines connecting the outer sheets facing the stack.

The invention also relates to a cellular cardboard blank for producing a wedging device according to the invention, characterized in that it is formed from a single cellular cardboard blank having two outer sheets of paper. parallel between which extend a plurality of sheets of paper erected perpendicular or substantially perpendicular to the two outer sheets, the blank having on each outer sheet cutting and folding lines defining panels, each folding line being located opposite a line for cutting the other outer sheet of the blank in a direction perpendicular to the outer sheets of the blank, and the cutting and folding lines being arranged so that, after shaping, the panels are superimposed, two adjacent panels being connected to each other by a single fold line.

It is thus possible to produce the wedging device according to the invention in a very simple manner and to assemble it rapidly without risk of error, the panels being connected to each other.

In a variant, the cutting and folding lines may be parallel and alternate in a direction perpendicular to the lines. In this case, each cut line of an outer sheet of the blank is located opposite a fold line of the other outer sheet of the blank in a direction perpendicular to the outer sheets of the blank.

In another variant, the cutting and folding lines can be perpendicular, and optionally the cutting lines can be parallel two by two and in the extension of one another and the fold lines can be parallel two by two. and in continuation of one another. In this case, each fold line of an outer sheet of the blank is located opposite a cut line of the other outer sheet of the blank in a direction perpendicular to the outer sheets of the blank and the cut lines of a outer sheet of the blank are located opposite cut lines of the other outer sheet of the blank in the same perpendicular direction.

The invention thus also relates to a method of shaping the cellular cardboard blank according to the invention, in which the blank is folded until the outer sheets of adjacent panels are superposed, connected by a fold line.

Advantageously, the adjacent superimposed panels can be assembled by at least one technique chosen from gluing, interlocking, stapling.

• La figure 1 représente schématiquement une vue en perspective d'un dispositif de calage selon un mode de réalisation.
• La figure 2 représente une vue en coupe transversale du dispositif de calage de
• la figure 1.
• La figure 3 représente une vue en perspective d'un flan en carton alvéolaire pour la réalisation d'un dispositif de calage selon un autre mode de réalisation.
• La figure 4 représente une vue de côté du flan de la figure 3 en cours de mise en forme.
• La figure 5 représente une vue en perspective d'un flan en carton alvéolaire pour la réalisation d'un dispositif de calage selon un autre mode de réalisation.
• La figure 6 représente une vue en perspective du flan de la figure 5 en cours de mise en forme.

The invention is now described with reference to the accompanying drawings, which are not limiting, in which:

• The figure 1 schematically shows a perspective view of a wedging device according to one embodiment.
• The figure 2 shows a cross-sectional view of the wedging device
• the figure 1 .
• The figure 3 shows a perspective view of a cellular cardboard blank for producing a wedging device according to another embodiment.
• The figure 4 represents a side view of the blank of the figure 3 being formatted.
• The figure 5 shows a perspective view of a cellular cardboard blank for producing a wedging device according to another embodiment.
• The figure 6 represents a perspective view of the blank of the figure 5 being formatted.

In the description of the figures, the same elements are designated by the same references, optionally followed by a prime (').

By substantially parallel or perpendicular is meant a direction / a plane deviating by at most ± 20 °, or even at most 10 ° or at most 5 ° from a direction / plane parallel or perpendicular .

The figure 1 shows a wedging module 1 comprising a stack of three assembled honeycomb cardboard panels 10, 20, 30.

Each cellular cardboard panel 10, 20, 30 comprises two parallel outer sheets of paper 11, 12, respectively; 21, 22; 31, 32 between which extend a plurality of sheets of paper, respectively 13, 23, 33 erected perpendicular or substantially perpendicular to the two outer sheets 11, 12; 21, 22; 31, 32.

The panels 10, 20, 30 are assembled superimposed on the side of their outer sheets. In other words, two adjacent panels of the stack have facing outer sheets.

In the example, the panels 10, 20, 30 have the same shapes and dimensions so that the stack has substantially continuous faces. This can facilitate the insertion of the wedging device inside a package. Note, however, that the panels may have identical shapes and dimensions parallel to their outer sheets but a different dimension perpendicular to their outer sheets. In other words, panels of different heights (measured perpendicular to the outer sheets) can be used.

Furthermore, according to the invention, at least one cellular cardboard panel defines at least one housing for receiving an object opening onto at least one of its outer sheets.

In the example, the central panel 20 has a single housing 24, here passing through, in other words opening onto its two outer sheets. Thus, an object introduced inside the housing is protected by the outer panels 10 and 30 perpendicular to the outer sheets thereof and by the central panel 20 parallel to the outer sheets. This housing 24 is here of parallelepiped shape.

The invention is of course not limited by the shape and the number of housings which can be chosen as a function of the number of objects to be wedged and the dimensions of the object or objects to be wedged.

Housing may also be provided on the panels 10 and 30, possibly extending over part of the height of these panels (measured perpendicularly to their outer sheets), or entirely passing through. Finally, adjacent panel housings may communicate to accommodate an object having a dimension greater than the height of a single panel.

In general, a housing may extend over the entire height of the upright sheets 13, 23, 33, in particular when the housing is produced by cutting, or over part of the height of the upright sheets 13, 23, 33, in particular when the housing is produced by stamping (crushing).

A honeycomb board panel usually has a thickness (or height), measured perpendicular to its outer sheets, of the order of 1 to 10 cm. The direction in which the strength of a cellular board panel is greatest is the direction perpendicular to its outer sheets.

In the example shown, two adjacent panels of the stack are connected to each other by an edge of their facing outer sheets, these connections between the panels being located alternately on opposite sides of the 'stacking. Thus, as seen more clearly figure 2 , panels 10 and 20 are connected on the left side of the stack (when looking at the figure 2 ) by a link 15, while the panels 20 and 30 are connected on the right side of the stack (when looking at the figure 2 ) by a link 25.

These connections can be obtained by bonding an adhesive tape or be fold lines, for example when the wedging device 1 is obtained by shaping a blank of the type described with reference to figure 3 . On this figure 3 , is shown a blank 100 of cellular cardboard having two parallel outer sheets of paper 101, 102 between which extend a plurality of sheets of paper 103 erected perpendicular or substantially perpendicular to the two outer sheets 101, 102.

The blank 100 has on each outer sheet 101, 102 cutting lines 104 and alternating parallel fold lines 105 defining between them the panels, here four panels 10, 20, 30, 40. On the figure 3 , the cutting lines 104 are represented by double lines, the fold lines 105 by single lines.

It will be noted that a cutting line 104 of an outer sheet 101 of the blank is located opposite a fold line 105 of the other outer sheet 102 of the blank in a direction perpendicular to the outer sheets of the blank.

In this example, the blank 100 has two housings 24, 34 arranged on adjacent panels 20, 30 and arranged so as to communicate when these panels are superimposed. In particular, when the panels 20 and 30 are superimposed, the housings 24, 34 thus form a single housing, the walls of which are continuous.

The particular arrangement of the cutting lines 104 and folding lines 105 allows the blank 100 to be shaped as shown. figure 4 . This shaping is carried out by folding the blank 100 along the folding lines 105 in order to bring the panels 10, 20, 30, 40 together as shown by the arrows of the figures 3 and 4 until these panels are superimposed and form a stack of the type shown figures 1 and 2 . This shaping by folding makes it possible to avoid any error during the assembly of the panels and to position the panels correctly with respect to each other, which is particularly advantageous when adjacent panels have housings 24, 34 which must communicate. to form a large housing, as in the example shown.

The figure 5 shows another embodiment of the blank 100 'for the production of a wedging device having four panels.

The blank 100 'has on each outer sheet 101', 102 'cutting lines 104' and folding lines 105 'defining between them four panels 10', 20 ', 30', 40 '. On the figure 5 , the cutting lines 104 'are represented by double lines, the fold lines 105' by single lines.

It will be noted that each fold line 105 'of an outer sheet 101' of the blank is located opposite a cut line 104 'of the other outer sheet 102' of the blank in a direction perpendicular to the outer sheets of the blank.

In this example, the blank 100 has two housings 24 ', 34' arranged on adjacent panels 20 ', 30' and arranged so as to communicate when these panels are superimposed. In particular, when the panels 20 'and 30' are superimposed, the housings 24 ', 34' thus form a single housing, the walls of which are continuous after shaping of the blank.

The particular arrangement of the cutting lines 104 'and folding 105' allows the blank 100 'to be shaped as shown. figure 6 . This shaping is carried out by folding the blank 100 ′ along the folding lines 105 ′ in order to bring the panels 10 ′, 20 ′, 30 ′, 40 ′ closer to each other as shown by the arrows of the figures 5 and 6 until these panels are superimposed and form a stack of the type shown figures 1 and 2 , but with links provided alternately on adjacent sides of the stack. It will thus be understood that with judicious positioning of the cutting and folding lines, it is possible to produce a stack of panels in which two adjacent superimposed panels are connected by a single folding line. Stacks comprising three, four or more panels can thus be easily produced.

Whatever the embodiment of the blank, the panels, after shaping of the blank or during the latter, are assembled by gluing, stapling, interlocking or any other suitable technique.

The invention has been described with reference to a wedging device comprising three or four stacked panels. The invention is not however limited to a number of panels, the latter being chosen according to the thickness of the panels and the dimensions of the objects to be wedged.

Claims (10)

Wedging device (1) for an object comprising a stack of at least three panels (10, 20, 30, 40; 10 ', 20', 30 ', 40') of assembled honeycomb cardboard, each panel comprising two sheets parallel outer sheets of paper between which extend a plurality of sheets of paper drawn up perpendicular or substantially perpendicular to the two outer sheets, the panels being assembled superimposed on the side of their outer sheets,
and wherein at least one panel of cellular cardboard defines at least one housing (24, 34, 24 ', 34') for receiving an object opening onto at least one of its outer sheets. A wedging device (1) according to claim 1, comprising a stack of at least four stacked and assembled honeycomb cardboard panels, at least one of which defines at least one housing opening onto at least one of its outer sheets. A wedging device (1) according to claim 1 or 2, in which each housing is chosen from a housing produced by stamping and a housing produced by cutting. A wedging device (1) according to any one of claims 1 to 3, in which at least one panel has at least one housing communicating with a housing of an adjacent panel. A wedging device (1) according to any one of claims 1 to 4, in which the panels of the stack have the same shapes and dimensions, at least in a plane parallel to their outer sheets. Wedging device (1) according to any one of claims 1 to 5, in which two adjacent panels of the stack are connected to each other by an edge of their facing outer sheets, these connections between the panels being located alternately on opposite sides of the stack or alternately on adjacent sides of the stack. A wedging device (1) according to claim 6, in which the links are fold lines connecting external sheets facing the stack. Blank (100, 100 ') of cellular cardboard for producing a wedging device (1) according to any one of claims 1 to 7, characterized in that it is formed from a single blank (100, 100 ') of honeycomb board having two parallel outer sheets of paper between which extend a plurality of sheets of paper erected perpendicular or substantially perpendicular to the two outer sheets, the blank having on each outer sheet cutting (104, 104 ') and folding (105, 105') lines defining panels, each folding line ( 105, 105 ') being located opposite a cutting line (104, 104') of the other outer sheet of the blank in a direction perpendicular to the outer sheets of the blank, and the cutting and folding lines being arranged so that, after shaping, the panels are superimposed, two adjacent panels being connected to each other by a single fold line. A method of forming the honeycomb board blank (100, 100 ') according to claim 8, wherein the honeycomb board blank is folded over to overlap the outer sheets of adjacent panels connected by a fold line. Method according to Claim 9, in which the adjacent superimposed panels are assembled by at least one technique chosen from gluing, interlocking, stapling.

Images