FR3038879A1 - MOUNTING A FLOOR FLOOR ON A FLOOR OF A MOTOR VEHICLE - Google Patents

Abstract

The invention relates to a mounting (1) of a raised floor (2) on a wall (3) of a motor vehicle floor, said false floor comprising a structure (4) made of molded plastic material, said structure comprising a plate ( 5) and a plurality of leg means (6a, 6b) coming from the rear face of said plate, said means having a bearing end (7) facing said wall so as to bear on said wall, said structure rests on said wall by at least three of said means, called main means (6a), comprises a plurality of other said means, called auxiliary means (6b), whose support end (7) is located, in absence of downward force applied to said plate at a distance (14) from said wall, said distance being less than or equal to 8 mm, and in particular less than or equal to 5 mm, and in particular between 3 and 5 mm.

Description

The invention relates to a mounting of a raised floor on a floor wall of a motor vehicle.

It is known to mount a false floor on a motor vehicle floor wall, said false floor comprising a structure of molded plastic material, said structure comprising a plate and a plurality of base means from the face of the vehicle. said plate, said means having a bearing end facing said wall so as to be supported on said wall.

With such an assembly, the number of base means being often important, especially greater than ten, the structure rests on the wall non-isostatically.

It is therefore generally necessary to have an intermediate damping layer - for example based on elastically compressible foam or felt - between the structure and the wall to avoid unwanted noise, which has an impact in terms of cost and weight . The invention aims to overcome this disadvantage. To this end, the invention proposes a mounting of a raised floor on a motor vehicle floor wall, said raised floor comprising a molded plastic material structure, said structure comprising a plate and a plurality of base means derived from the rear face of said plate, said means having a bearing end facing said wall so as to be able to bear on said wall, knowing that said structure: • rests on said wall by at least three of said means, called main means Comprises a plurality of other means, called auxiliary means, whose support end is located, in the absence of downward force applied to said plate, at a distance from said wall, said distance being less than equal to 8 mm, and especially less than or equal to 5 mm, and in particular between 3 and 5 mm.

In this description, the terms of positioning in the space (up, down, vertical, ...) are taken in reference to the assembly disposed in the vehicle.

With the proposed arrangement, the structure rests on the wall more isostatically than in the embodiments of the prior art, insofar as only the main means are supported on the wall, knowing that the ancillary means can possibly be find support only when a downward force is applied to the plate so as to deform said structure, in particular by supporting the feet of the passengers.

In particular, the structure - or one of its areas - can rest perfectly isostatic on the wall when the main means are limited - at least in said area - to three.

With such an arrangement, it is possible to dispense with the presence of an intermediate damping layer between the structure and the wall, which reduces the cost and the weight of the assembly. Other features and advantages of the invention will appear in the description which follows, made with reference to the appended figures, in which: FIG. 1 is a schematic view in partial vertical section of an assembly according to a first embodiment; FIG. 2 is a diagrammatic view from above of a false floor structure of the assembly of FIG. 1; FIG. 3 is a schematic perspective view of a false floor structure of an assembly according to a second embodiment; FIG. 4 is a schematic view in partial vertical section of the structure of FIG. 3.

Referring to the figures, there is described a mounting 1 of a raised floor 2 on a wall 3 of a motor vehicle floor, said false floor comprising a structure 4 of molded plastic material, said structure comprising a plate 5 and a plurality of means of base 6a, 6b from the rear face of said plate, said means having a bearing end 7 facing said wall so as to bear on said wall, knowing that said structure: • rests on said wall by a at least three of said means, called main means 6a, • comprises a plurality of other means, referred to as auxiliary means 6b, whose support end 7 is located, in the absence of downward force applied to said plate, remote 14 of said wall, said distance being less than or equal to 8 mm, and in particular less than or equal to 5 mm, and in particular between 3 and 5 mm.

According to the embodiments shown, the structure 4 rests directly, without interposition of intermediate damping layer, on the wall 3.

According to the first embodiment, the assembly 1 comprises at least two fastening means 8 - in particular in the form of pins passing through orifices 9 provided in the structure 4 and in the wall 3 - of the structure 4 to the wall 3, said means of fixing being located in a top view (see Figure 2) between a line passing through the center of two of the main means 6a and the center of a third main means 6a, said fixing means being mounted in stress - in particular so as to generate a slight elastic deformation of the structure 4 - so as to ensure a plating of said main means against said wall.

According to one embodiment, the base means 6a, 6b come from the material of the plate 5.

According to one embodiment, not shown, the structure 4 comprises at least two cellar areas with feet, each of said zones being provided with three main means 6a, the other base means being adjoining means 6b.

The structure 4 thus rests on the wall 3 in each of its zones in a perfectly isostatic manner.

According to the first embodiment, the plate 5 is in the general form of plate, the base means 6a, 6b being in the form of hollow pads, here of generally frustoconical shape.

According to the second embodiment: • the plate 5 seen from above is generally a network of contiguous cells 10 defining a repeating pattern deployed in two axes, said cells being generally open upwardly and downwardly, • said cells are delimited by partitions 11 extending generally vertically, two contiguous cells having at least a portion of partition 11 common, • the material constituting the structure 4 has a fluidity MFR - according to ISO 1133 - greater than or equal to 50, and in particular between 50 and 80, said partitions generally have a thickness of between 0.6 and 1.6 mm, and in particular between 0.7 and 1.4 mm, and in particular between 0.8 and 1.2 mm. said thickness varying in a progressive manner so as to have at least one undercut enabling demoulding, said partitions extend, at least for one party e of them, downwards by tabs resulting from molding forming the base means 6a, 6b said tabs having a thickness similar to that of said partitions.

In one embodiment, the cells 10 are deployed along the two axes in a maximum pitch of 50 mm, and in particular at a maximum pitch of 30 mm.

According to the embodiment shown, the two axes in which the cells 10 are deployed are perpendicular.

According to the embodiment shown, the cell pattern 10 is a square.

According to the embodiment shown, as visualized in FIG. 3, the structure 4 comprises at least three clusters 12 of contiguous tabs whose bearing end 7 rests on the wall 3 so as to form main means 6a, the bearing end 7 of the other tabs being located at a distance 14 from said wall so as to form additional means 6b, said clusters being spaced apart from each other so as to form three base blocks resting on said wall.

In particular, the bearing ends 7 of the legs 6a of the clusters 12 are interconnected by a bottom wall 13, so that said clusters have a general form of stud.

In a manner not shown, on all the embodiments, it is in particular provided to have on the tray 5 an appearance coating layer, for example based carpet.

Claims (9)

1. Assembly (1) of a raised floor (2) on a wall (3) of motor vehicle floor, said false floor comprising a structure (4) of molded plastic material, said structure comprising a plate (5) and a plurality of leg means (6a, 6b) coming from the rear face of said plate, said means having a bearing end (7) facing said wall so as to be able to bear on said wall, said mounting being characterized in that said structure: • rests on said wall by at least three of said means, called main means (6a), • comprises a plurality of other said means, called auxiliary means (6b), whose support end ( 7) is located, in the absence of downward force applied to said plate, at a distance (14) from said wall, said distance being less than or equal to 8 mm, and in particular less than or equal to 5 mm, and especially included between 3 and 5 mm. 2. Assembly according to claim 1, characterized in that the structure (4) rests directly, without interposition of intermediate damping layer, on the wall (3). 3. Assembly according to one of claims 1 or 2, characterized in that it comprises at least two fastening means (8) of the structure (4) to the wall (3), said fixing means being located in view between a line passing through the center of two of the main means (6a) and the center of a third main means (6a), said fastening means being mounted in a constraint so as to ensure a plating of said main means against said wall . 4. Assembly according to any one of claims 1 to 3, characterized in that the base means (6a, 6b) are derived from the material of the plate (5). 5. Assembly according to any one of claims 1 to 4, characterized in that the structure (4) comprises at least two cellar areas with feet, each of said zones being provided with three main means (6a), the other means of base being ancillary means (6b). 6. Assembly according to any one of claims 1 to 5, characterized in that the plate (5) is generally plate-shaped, the base means (6a, 6b) being in the form of hollow studs, in particular of general shape. truncated. 7. An assembly according to any one of claims 1 to 6, characterized in that: • the plate (5) seen from above is generally an array of cells (10) contiguous defining a repeating pattern deploying along two axes said cells being generally open upwards and downwards, said cells are delimited by generally vertically extending partitions (11), two contiguous cells having at least one common partition portion (11), the constituent material of the structure (4) has a fluidity MFR - according to ISO 1133 - greater than or equal to 50, and especially between 50 and 80, • said partitions generally have a thickness of between 0.6 and 1.6 mm, and in particular between 0.7 and 1.4 mm, and especially between 0.8 and 1.2 mm, said thickness varying gradually so as to have at least one body allowing demoula ge, • said partitions are extended, at least for part of them, downwards by tabs resulting from molding forming the base means (6a, 6b), said tabs having a thickness similar to that of said partitions. 8. Assembly according to claim 7, characterized in that the structure (4) comprises at least three clusters (12) of contiguous tabs whose bearing end (7) rests on the wall so as to form main means (6a ), the support end of the other legs being located at a distance (14) from said wall so as to form auxiliary means (6b), said clusters being arranged at a distance from each other so as to form three blocks of resting base on said wall. 9. Assembly according to claim 8, characterized in that the bearing ends (7) of the legs of the clusters (12) are interconnected by a bottom wall (13), so that said clusters have a general shape of stud.