FR2869883A1 - Rigid sheet e.g. windshield, package, has cardboard plate receiving sheet and having central panel with plastic film that is deformed in case of vertical shock of panel to absorb forces transmitted to package and to dampen shock - Google Patents

Abstract

The package has a cardboard plate (1) for receiving a rigid sheet. The plate has a central panel (6) with a plastic film (9) for integrating the sheet against the central panel of the plate. The sheet is maintained in suspension when the plate is in vertical position. The plastic film is deformed in case of vertical shock of the panel to absorb forces transmitted to the package due to the shock and to dampen the shock.

Description

The invention relates to the field of packaging made of cardboard or other material

  semi-rigid. It relates to the packaging of a product in the form of a rigid sheet, flat or curved, such as a windshield, a door or a bodywork element a vehicle hood, a glazing, a panel of 'insulation.

  Windshields are often desired to be packaged in individual packages to be packaged and transported to protect them from shocks, from the point of manufacture to the assembly site, at the place of assembly for move them in the workshops or in a repair shop. These individual packages make it possible to handle, transport and store windshields to the unit.

  Such packages are known, for example from patent EP 0 133 085. The packaging described in the latter consists of a rectangular cardboard blank formed of a central panel on which the windshield is placed, extended by two side panels that are folded on it. Cuttings are made transversely on the blank and serve as housing with two straps circling and maintaining the cohesion of the whole.

  The present invention aims to: - simplify the operations and handling of the parts at the time of packaging the product, to facilitate the handling of a packaged product, - that the packaged product occupies a volume as low as possible during storage, - to reduce the time of provision of the product when it is removed from its packaging, - to reduce the amount of material used and - to provide effective protection against any shocks received. The applicant has set a goal for a product weighing between 10 and 50 kg, that the package can dampen, without adverse effect on the product, three to four vertical drops of about thirty centimeters on its lower edge.

  To this end, the invention relates to a rigid sheet-shaped product package comprising a plate made of semi-rigid material for covering said sheet, the plate comprising at least one adhesive bonding means by which the rigid sheet is made integral with the plate, the sheet being able to be kept in suspension when the plate is erected in a vertical position, characterized in that the connecting means comprises a support arranged to deform in the event of a vertical drop and thus provide a function of damping of the fall.

  Preferably, the support comprises at least one sheet of plastic material.

  Advantageously, the support is bonded to the plate by at least two first surface portions, spaced apart from one another, an adhesive being applied to the support on the rigid sheet side at least on a second surface portion between the first two portions.

  Advantageously, the first two surface portions are coated with a first adhesive material.

  Advantageously in this case, the second surface portion is coated with a second adhesive material different from the first adhesive material.

  According to one characteristic of the invention, the plate comprises an upper edge, two lateral panels, articulated around at least one fold line, and a lower panel, articulated around at least one fold line, intended to cover at least one fold line, less in part the sheet.

  Preferably in this case, the side panels and the bottom panel comprise locking means to each other.

  More preferably, the side panels and the bottom panel are arranged to form feet on the lower side once the sheet is covered.

  According to a feature of the invention, the plate comprises fold lines to facilitate the deformation of the plate and its application against the rigid sheet when it is not flat.

  According to another characteristic of the invention, the plate has lateral handles through which it can be grasped.

  Advantageously, the packaging comprises an envelope of heat-shrinkable plastic material to cover the assembly formed by the plate and the sheet.

  In the preferred embodiment of the invention, the plate is made of corrugated cardboard, which has grooves perpendicular to the upper edge.

  The invention will be better understood with the aid of the following description of the preferred embodiment of the packaging of the invention, with reference to the attached plates, in which: FIG. 1 represents a view from above of the carton board of the preferred embodiment of the package of the invention; Figure 2 shows a top view of the carton of the preferred embodiment of the package of the invention, on which a windshield has been placed; FIG. 3 represents a sectional view of the plastic film of the preferred embodiment of the packaging of the invention; FIG. 4 shows a view of the rear face of the plastic film of the preferred embodiment of the packaging of the invention and FIG. 5 is a perspective view of the cardboard plate of the preferred embodiment of FIG. the packaging of the invention, closed on the windshield of Figure 2.

  With reference to FIG. 1, the package comprises a plate 1, here made of corrugated cardboard. The corrugated cardboard generally comprises two cover sheets, between which are arranged one or more layers of grooves, which extend in the direction shown schematically by the lines contained in the triangle 2 which has been drawn on the plate 1 of FIGS. 2. This representation of the direction of the flutes is well known to those skilled in the art.

  The plate can also be made from another semirigid material, for example a cellular plastic material such as the product sold under the trademark Akylux by the applicant.

  The plate 1 is here of generally rectangular shape, for a rigid sheet, for example a windshield, also of generally rectangular shape. Other forms are possible, for example semi-oval.

  By means of a marking is meant a marking on the surface of the plate which aids in its folding. A groove is obtained by crushing the material along a line that constitutes the hinge line or, in the case of a corrugated board, by cutting one of the cover sheets along this line. line.

  The plate 1 comprises a said upper edge 3, rectilinear. Perpendicular to this edge, two double grooves (4, 4 '), (5, 5') delimit a central panel 6 and two side panels 7, 8. Each groove is spaced from the other groove of the double groove (4, 4 '), (5, 5') to which it belongs by a distance "e" corresponding to the thickness, or a little more, of the rigid sheet to be wrapped.

  In the remainder of the description, it will be considered that the plate 1 extends in a vertical plane, with its upper edge 3 placed at the top. All elements of the plate will be described in this reference. Note that if the plate 1 is corrugated cardboard, its grooves extend vertically.

  The central panel 6 comprises a surface portion comprising a sheet, or plastic film 9 arranged to retain the rigid sheet against the central panel 6 and deform in case of vertical shock. This plastic film will be described in more detail later.

  Each side panel 7, 8 comprises a lower edge 7 ', 8', respectively opposite and parallel to the upper edge 3 of the plate 1. Between these lower edges 7 ', 8', extends a lower panel 10 which extends the central panel 6 down. The lower panel 10 extends over the entire length of the central panel 6, between the inner channels 4, 5 of the double grooves (4, 4 '), (5, 5').

  The central panel 6 and the bottom panel 10 have six vertical channels 12 which extend from the upper edge 3 of the plate 1 to the lower edge 13 of the bottom panel 10. The central panel 6 comprises a double groove (11, 11 ') horizontal, whose raines 11, 11' are spaced the same distance "e" as before. The double groove (11, 1 l ') extends over the entire length between the two vertical raines 12 of the central panel 6 closest to the side panels 7, 8, but not between these two vertical raines 12 and the double grooves (4, 4 '), (5, 5'). The lower trench 11 'of the double trench 2869883 -5 (11, 11') extends at an altitude "h" above the altitude of the lower edges 7 ', 8' of the side panels 7, 8.

  The central panel 6 further comprises two cutouts 14, 14 ', located in its lower part and near the side panels 7, 8, symmetrical to one another with respect to a central vertical axis of the central panel 6. Only the left cut 14 will be described, the cut 14 'being deduced by symmetry.

  The left cut 14 firstly presents a first horizontal segment 14a, which has its source on the left at the left end of the lower edge 7 'of the left side panel 7 and extends to the right. It then comprises an oblique segment 14b which extends upwards and to the right. Following this oblique segment 14b, it comprises a second horizontal segment 14c which extends to the right to the groove 12 of the central panel 6 closest to the left lateral panel 7. This second horizontal segment 14c is located at an altitude "h" above the upper raine 11 of the horizontal double rane (11, 11 '), which is the same altitude "h" as that which separates the lower edge 7' of the left side panel 7, and therefore the first horizontal segment 14a, of the lower groove II 'of the horizontal double groove (11, 11'). From the second horizontal segment 14c, the cutout 14 comprises a vertical segment 14d which extends downwards, along the leftmost groove 12, to the lower horizontal groove 11 'of the horizontal double groove ( 11, 11 ') of the central panel 6.

  Referring to Figure 3, the plastic film 9 is in the form of a rectangular sheet, the length of which is at least twice as large as the width. In the preferred embodiment of the invention, it has a thickness of 80 m. On a first face, referred to as the front face 15, the film is coated uniformly with a coating of adhesive material 16. This adhesive material 16 is intended to form a bond with the rigid sheet to be wrapped, here the windshield. It is chosen so that the resistance to the shearing forces of the connection is sufficient so that the windshield remains suspended from the film 9, in the vertical position, but that the windshield can be detached from the film 9 by the effort of an operator, without this leaving him any traces. Such an adhesive is for example similar to those which are stuck on the bodies of new cars to protect them but can be peeled without damaging the paint.

  The plastic film 9 comprises, on its opposite face, the rear face 17, three adhesive strips 18a, 18b, 18c, extending along the length of the film 9. Two strips 18a, 18c extend along the lengths of the film 9. lateral edges of the film 9 and a strip 18b in the center of the latter, and delimit between them two zones 19, 19 'non-adhesive symmetrical with respect to the central strip 18b. These adhesive strips 18a, 18b, 18c are double-sided adhesive tapes, one face being bonded to the plastic film 9 and the other being intended to be adhered, in a strong connection, to the central panel 6 of the plate 1. These strips 18a, 18b, 18c could also be obtained by applying a hot glue on the film 9.

  The plate 1 comprises two oval-shaped cutouts 20, 21 horizontally overlapping the double vertical rakes (4, 4 '), (5, 5'), at an altitude corresponding to approximately two-thirds of their height. Each cutout 20, 21 is symmetrical with respect to the double groove (4, 4 '), (5, 5') that it overlaps and the two cuts 20, 21 are symmetrical to one another with respect to a vertical central axis of the central panel 6.

  Each side panel 7, 8 comprises a cutout 22, 23, respectively, intended to cooperate with a corresponding tongue 24, 25, respectively, located on the lower panel 10, when a rigid sheet is packaged, as will be seen later.

  The method of placing a rigid sheet package of the invention will now be described in more detail with reference to Figures 1, 2 and 5.

  Plate 1 is laid flat. The plastic film 9 is bonded by the adhesive strips 18a, 18b, 18c of its rear face 17, in the center of the central panel 6 of the plate 1. The film 9 is bonded so that its lateral edges, the lengths of the rectangle of which it has the shape, are parallel to the raines 12 of the central panel 6, its width does not exceed the distance between the two central grooves 12 between which it is glued.

  If the coating 16 of the front face 15 of the film 9 was protected by a protective film, the latter is removed. A windshield 26 is deposited on the plate, so that its lower edge 27 extend along the upper groove 11 of the horizontal double groove (11, 11 ') of the central panel 6 and that its lateral edges 28, 29 extend along the inner channels 4, 5, respectively, of the vertical double grooves (4, 4 '), (5, 5') of the side panels 7, 8. Its upper edge 30 is located inside the central panel 6, spaced from the upper edge 3 of the latter. The lower edge 27 of the windshield 26 may advantageously extend above the upper horizontal groove 11, spaced upwardly thereof; the advantages of this configuration will be seen later.

  The side panels 7, 8 are folded along the vertical double rolls (4, 4 '), (5, 5'), on the windshield 26. The width surface "e" between the grooves of the vertical double rolls (4, 4 '), (5, 5') makes it possible to wrap the thickness of the windshield 26.

  If the windshield 26 is curved, which is most often the case, the plate 1 is deformed around the vertical raines 12 and its surface comes into contact with that of the windshield 26. It is then pressed in the region of the film 9 to form the connection between the windshield 26 and the plate 9, through the coating of adhesive material 16, which is glued to the windshield 26.

  The lower panel 10, along the double groove (11, 11 '), is folded over the side panels 7, 8 and the windshield 26, the surface of width "e" between the grooves 11, 11' allowing Wrap the thickness of the windshield 26. In doing so, the cutouts 14, 14 'pivot about the double horizontal rille (11, 11') of the central panel 6. The second horizontal segment 14c of the left cutout 14 is then found, according to the previously mentioned dimensions (especially the two dimensions h), at the lower edge 7 'of the left side panel 7. The same is true of the right side, by symmetry.

  With reference to FIG. 5, the plate 1 then comprises a compression edge of the lower edge of the windshield 26, consisting of the surface between the two horizontal raines 11, 11 ', of width e. There is advantageously no contact between these two edges, as announced above. Below this surface, the plate 1 has two feet 31, 32, constituted by the lower part of the side panels 7, 8 and the surfaces of the central panel 6, located between the cutouts 14, 14 ', which have pivoted when the the bottom panel 10 has been folded up. These feet 31, 32 thus have a ground clearance of a height h. The tabs 24, 25 of the bottom panel 10 are tucked into the recesses 22, 23 of the side panels 7, 8 to lock the assembly together. The respective positions of the tongues 24, 25 and cutouts 22, 23 have been arranged so that these elements face each other once the packaging in this folded configuration. It goes without saying that the tabs could be arranged on the side panels 7, 8 and the cutouts on the bottom panel 10, the objective being anyway to obtain a locking system of the lower panel 10 on the panels lateral 7, 8.

  The cutouts 20, 21 which overlapped the vertical double rolls (4, 4 '), (5, 5') form, once the packaging is formed, grip handles on either side of the package.

  Once the plate 1 and the windshield 26 thus assembled, the assembly is presented to a wrapping station, not shown. It comprises means for wrapping the entire film of heat-shrinkable material. The latter, under a flow of appropriate hot air, heats to the temperature where it retracts. The casing thus formed provides protection of the assembly, and also exerts pressure on the latter, in order to constrain the windshield 26 to remain stuck to the plate 1 and the lower panel 10 to remain attached to the side panels 7, 8, the locking by the tabs 24, 25 and the cutouts 22, 23 being thereby completed and ensured.

  The packaging of the windshield 26 thus formed makes it possible not only to condition the windshield 26 and to place it on the feet 31, 32 vertically, but also to ensure damping of the forces in the event of a vertical fall. Indeed, suppose that the packaging, in vertical position, falls vertically. It lands on the feet 31, 32, which absorb some of the forces, by compression of the various surfaces of the cardboard that compose them. In addition, the windshield 26 may have been voluntarily positioned at a higher altitude on the central panel 6, so that its lower edge 27 does not come into contact with the surface between the horizontal raines 11, 11 . This is feasible because the coating of adhesive material 16 on the front face 15 of the plastic film 9 ensures the suspension of the windshield 26 on the central panel 6. The shock tends to slide the windshield 26 downwards. Since the plastic film 9 is integral with the windshield 26 over its entire front face 15 and is secured to the plate 1 only along the strips 18a, 1b, 18c, the windshield 26 will tend to deform the film 9 by dragging it downwards, but only in the zones 19, 19 'which do not adhere to the plate 1. This deformation of the plastic film 9 makes it possible to absorb the forces transmitted to the packaging of the make the fall and amortize the latter.

  The packaging of the invention is dimensioned so as to assume, without damaging the windshield 26, three to four falls of about thirty centimeters in altitude, for a windshield weighing 10 to 50 kg. As we have seen, the damping is provided by the feet 31, 32 and the deformation of the plastic film 26.

  It is also possible to roll the package along its faces passing from one face to another because the connection between the central panel 6 and the windshield 26 is strong enough to keep the windshield in suspension on the central panel 6 during such an operation, especially when it is the upper edge 3 of the plate 1 which comes to the ground. A fall on the upper edge 3, however, can not be depreciated because it does not include damping feet.

  Advantageously, the corrugated cardboard is chosen so that its flutes are lighter than the sheets of blankets. For example, grooves of 105 g / m2 and cover sheets of more than 200 g / m2 can be selected. The cardboard thus offers a better resistance to tearing forces, which is important, in particular, for the tongues 24, 25. The cardboard must also be able to deform to absorb vertical drops while having a sufficient resistance to tearing.

  According to a preferred embodiment of the invention, the length of the plastic film 9 is equal to at least three quarters of the height of the central panel 6 between the upper horizontal rim 11 and the upper edge 3.

  The damping related to the film is obtained because the strips 18a, 18b, 18c make the portions of the corresponding film 9 integral with the plate 1, while the zones 19, 19 'situated between them are not integral with the plate 1 but integral with the rigid sheet 26, while being integral with the portions of the film 9 corresponding to the strips, since it is the same film 9. These differences in solidarity cause deformation of the film 9 in the event of vertical stress on the sheet rigid 26, since the zones 19, 19 'which are integral therewith will deform downwards with respect to the zones 18a, 18b, 18c integral with the plate 1 and which can not, as a result, be deformed.

  2869883 -Io- A similar behavior of the film could be obtained in various ways. Indeed, the number of bands 18a, 18b, 18c must be at least two, but may be greater. The strips are not necessarily attached to the plate by an adhesive, but may be attached by any other fastening means, for example by stapling, nailing or riveting. In addition, the front face of the film 9 is not necessarily glued to the rigid sheet 26 homogeneously over its entire surface, it is sufficient that it be in the zones 19, 19 'between the strips 18a, 18b, 18c .

Claims (1)

2869883 CLAIMS   1. - Packaging for rigid sheet-shaped product (26) comprising a plate (1) of semi-rigid material for covering said sheet (26), the plate (1) comprising at least one adhesive connection means (9) by which the rigid sheet (26) is made integral with the plate (1), the sheet (26) being able to be kept in suspension when the plate (1) is erected in a vertical position, characterized in that the connecting means ( 9) comprises a support (9) arranged to deform in the event of a vertical fall and thus provide a damping function of the fall.   2. - Package according to claim 1, wherein the support (9) comprises at least one sheet of plastic material (9).   3. - Package according to one of claims 1 and 2, wherein the carrier (9) is bonded to the plate (1) by at least two first surface portions (18a, 18b, 18c) spaced one of the another, an adhesive (16) being applied on the side (15) of the rigid sheet (26) on a second portion (19, 19 ') between the two first portions (18a, 18b, 18c).   4. - Package according to claim 3, wherein the first two surface portions (18a, 18b, 18c) are coated with a first adhesive material.   5. - Package according to claim 4, wherein the second surface portion (19, 19 ') is coated with a second adhesive material (15) different from the first adhesive material.   6. - Package according to one of claims 1 to 5, wherein the plate (1) comprises an upper edge (3), two side panels (7, 8) articulated around at least one fold line ((4 , 4 '), (5, 5')), and a lower panel (10) hinged about at least one fold line (11, 11 ') for at least partially covering the rigid sheet (26). ).   7. - Package according to claim 6, wherein the side panels (7, 8) and the lower panel (10) comprise locking means ((22, 23), (24, 25)) to each other.   - 12 - 8. - Packaging according to one of claims 6 or 7, the side panels (7, 8) and the lower panel (10) are arranged to form feet (31, 32) of the lower side, once the covered sheet.   9. - Packaging according to one of claims 1 to 8, the plate (1) comprises fold lines (12) to facilitate the deformation of the plate (1) and its application against the rigid sheet (26) when it is not flat.   10. - Packaging according to one of claims 1 to 9, having lateral handles (20, 21) by which it can be grasped.   11. - Package according to one of claims 1 to 10, comprising a shroud of heat-shrinkable plastic material to cover the assembly formed by the plate (1) and the rigid sheet (26).   12. - Packaging according to one of claims 1 to 11, whose plate (1) is corrugated cardboard.   13. - Packaging according to claim 12 and claim 6, the corrugated cardboard has grooves perpendicular to the upper edge (3).