FR2849079A1 - NEW PARTITION COMPRISING PLASTERBOARDS WITH IMPROVED ACOUSTIC PROPERTIES - Google Patents

Abstract

The object of the invention is a partition comprising a plurality of uprights and a plurality of plasterboards on each side, in which the unit spaces delimited by the uprights and the boards are divided into 3 to 1000 volumes per m2, and preferably at less 6 volumes per m2. The invention also relates to a method of manufacturing a partition according to the invention.

Description

i

  NEW PARTITION COMPRISING PLASTER PLATES

IMPROVED ACOUSTIC PROPERTIES

  The invention relates to a new partition comprising plasterboard, which offers improved acoustics.

  Partitions comprising plasterboard, as well as these plates, have been known for many years. Partitions are described in particular in the Unified Technical Document DTU 25 41; these partitions are defined as a self-supporting, non-load-bearing distribution or wall lining wall, reigning over the height between floor and ceiling. These walls include metal frameworks, generally having a substantially U-shaped profile, for example consisting of a steel sheet of nominal thickness greater than or equal to 0.60 mm. Appropriate wooden frameworks are also described. The partitions include low and high beams (the rails) between which the uprights are arranged. The uprights can be doubled, nested or leaned As an example of a partition, the DTU in question mentions the partitions obtained with amounts of 48 25 mm and a simple facing of plates 12.5 mm thick and the partitions obtained with amounts of 48 mm and a double facing of 12.5 mm thick plates. These last two types of partition are those currently the most widespread on the French market.

  However, these partitions pose certain problems in terms of noise transmission.

  The use of glass wool or rock wool in these partitions is known to improve the sound insulation of these systems, the gain obtained being approximately 6 d B However, these wools pose problems during their handling, being very irritating In addition, these wools pose storage problems due to their large volume.

  The use of other products having an open porosity, such as polyurethane foams, is also known. However, such foams are difficult to use in the case of partitions with uprights and plates and are expensive compared to a solution. with glass wool.

  Finally, solutions such as sandwiches (for example with expanded polystyrene, possibly made elastic), if they are suitable for doubling, cannot be transposed to the case of the partition with uprights and plates.

  This is why there is a need for a partition 15 having acoustic properties, but which does not use these wools.

  The invention makes it possible to solve the problems mentioned above. The invention therefore provides a partition comprising a plurality of uprights and a plurality of plates on each side, in which the unit spaces delimited by the uprights and the plates are divided into 3 to 1000 volumes per m 2, and preferably at least 6 volumes per m 2.

  According to one embodiment, the unit spaces are delimited by strips glued on one side of the set of plates, preferably having a thickness less than the interval between the plates, the unit spaces forming 3 to 20 volumes per m 2, and preferably 6 to 20 volumes per m 2.

  According to another embodiment, the unit spaces are divided into 200 to 1000, and preferably 35 200 to 600, volumes per m 2.

  According to yet another embodiment, the unit spaces are divided by a network, this network being glued at most on one side of the set of plates, having a thickness less than the interval between the plates. According to another embodiment, the network has a thickness of 70 to 98% of the interval between the plates.

  According to another embodiment, the network is a honeycomb network.

  According to another embodiment, the network is made of cardboard. According to another embodiment, the unit spaces are divided by a network, this network not being glued to the set of plates.

  According to another embodiment, the plates are plasterboard.

  According to another embodiment, the partition comprises top and bottom rails holding the uprights and between which the network is maintained.

  According to another embodiment, the top and bottom rails comprise precut tabs which can be folded inwards and which are inserted into the network.

  The invention also provides a method of manufacturing a partition according to the invention, comprising providing a plurality of uprights and a plurality of plates, and dividing the unit spaces delimited by the uprights and plates.

  According to one embodiment, the method is intended for the manufacture of a partition, in which the unit spaces are divided into 200 to 1000, and preferably 200 to 600, volumes per m 2, by a network not being 30 glued to the set of plates according to the invention, the partition comprising top and bottom rails holding the uprights and between which the network is maintained, in which process the network is attached to one of the rails, the network is extended up to the other rail and it is fixed on the latter, in particular by folding back precut tabs present in the rails to insert the latter into the network.

  The invention is now described in more detail.

  in the following description, and with reference to

  drawings, in which: FIG. 1a is a first variant of a first embodiment; FIG. 1b is a second variant of a first embodiment; Figure 2 is a second embodiment; Figure 3 is an enlargement of a rail used in the second embodiment.

  With reference to FIG. 1, the partition 1 comprises a plurality of uprights (2 a, 2 b), here metallic, which support plasterboards 3 Two top and bottom rails (4 a, 4 b) block the uprights, in a classic way.

  Between the uprights are arranged strips (5 a, 5 b, 5 c, 5 d) of expanded polystyrene, blocked between the uprights.

  These strips thus divide the unit spaces delimited by the uprights and the plates. The air space (here 48 mm) (the space between the plates) can be divided in several ways, for example with strips forming Z or any other arrangement The thickness of the strips is typically less than the thickness of the air space, for example 40 mm to 46 mm The polystyrene strips are preferably held by blocking between the uprights It would however be possible to glue them on one side of the plates, or even both if the thickness allows (the latter method of installation is not preferred, however) The strips are strips of Polystyrene Other types of strip, for example metal strips or strips of material with open or closed porosity bring the same phenomenon In figures la and lb, the amounts are metal amounts of 48 mm conventionally spaced 60 cm In figure la, the bands used are strips of 1000 x 50 x 40; there are approximately 3.5 volumes per m 2 In Figure 1b, the bands used are bands of 560 x 100 x 46; there are approximately 6 volumes per m 2 The respective gains of these partitions compared to the partitions according to the prior art are 2 and 4 d B. With reference to FIG. 2, the partition 1 comprises the same amounts (2 a, 2 b), plasterboard 3 and top and bottom rails (4 a, 4 b) blocking the uprights Between the uprights is arranged a network 6, here in honeycomb.

  However, any type of elementary cell network 10, in particular a substantially oblique, substantially square, substantially rectangular or substantially hexagonal network, would be acceptable. A cardboard network, of the type already used for the lining partitions which include, will be used with advantage. a sandwich of two plates and a cardboard honeycomb between the two The network extends between the top and bottom rails, between the uprights It is possible to choose a network such that once unfolded it substantially fills the space between the uprights Such a network very well tolerates variations in height of a few tens of cm without losing its effectiveness This network thus divides the unit spaces delimited by the uprights and the plates A network can be used having a pitch for example of 55 mm It is possible to cut a network 25 cardboard easily, by hand or by machine The thickness of the network is typically less smaller than the thickness of the air space, for example 40 mm to 46 mm This network is preferably independent of the two plates (ie it is not glued to any plate) It is advantageously "stretched" between the top rails and low, but it could also be stretched or put in compression between the uprights, or glued on one of the plates In figure 2, the uprights are metallic uprights of 48 mm conventionally spaced by 60 cm The network used has a pitch of 55 mm and a thickness of 40 mm There are approximately 500 volumes per m 2 (number of cells of the network per m 2) The gain compared to the partitions according to the prior art is 5 d B. The number of cells per m 2 varies according to the inverse of the square of the lattice pitch It would be fully conceivable to provide any cell array, with a pitch comprised, for example, in the interval 40 to 100 mm, which would correspond approximately to a range from 200 to 1000 volumes per m 2.

  With reference to FIG. 3, the top or bottom rail (4 a, 4 b) has pre-cut tabs (7 a, 7 b) which are foldable inwards and thus fit into the network (the reference 7 a indicates the folded tab while the reference 7 b in dotted lines indicates the tab before folding) With these rails provided with these tabs, it is easy to manufacture partitions 15 according to the invention Firstly, the folded network is inserted into the rail, for example high, then fold the tabs inwards This has the effect of keeping the network in this rail Then, we "stretch" and "unfold" the network towards the other rail, and we proceed 20 as before with the folding of the corresponding tabs of this rail. Such an embodiment is very simple, robust and effective.

  However, other means of attachment to the network, such as screws, tabs or hooks could be suitable for the above embodiment.

  In the event of the end of the network link, a simple stapling allows joining from one network to another, the scraps can thus be used.

  Thanks to the invention, it is now possible to use filling materials which are not of open porosity, are easy to handle, are non-irritant, have a low storage volume and are easy to handle.

  The invention is not limited to the embodiments described but is capable of numerous variations easily accessible to those skilled in the art. For example, the material used for the plates can be cement or plywood, as is known in Likewise, tests have shown that it is possible to use strips of metallic material or of material with open or closed porosity, rather than polystyrene, to divide the unit spaces delimited by the uprights and plates.

Claims (9)

  1 Partition (1) comprising a plurality of uprights (2 a, 2 b) and a plurality of plates 5 (3) on each side, in which the unit spaces delimited by the uprights and plates (3) are divided into 3 to 1000 volumes per m 2, and preferably at least 6 volumes per m. 2 partition (1) according to claim 1, wherein the unit spaces are delimited by strips (Sa, 5 b, 5 c, 5 d) glued on one side of the set of plates (3), preferably having a thickness less than the interval between the plates (3), the unit spaces forming 3 to 20 volumes per m 2, and preferably 6 to 20 volumes per m 2.   3 partition (1) according to claim 1, wherein the unit spaces are divided into 200 to 1000, and preferably 200 to 600, volumes per m 2.   4 partition (1) according to claim 3, wherein the unit spaces are divided by a network (6), this network (6) being glued at most on one side of the set of plates (3), having a lower thickness at the interval 30 between the plates (3).   Partition (1) according to claim 4, in which the network (6) has a thickness of 70 to 98% of the gap between the plates 35 (3).   6 partition (1) according to claim 4 or 5, wherein the network (6) is a honeycomb network. 7 partition (1) according to one of claims 4 to 6, wherein the network (6) is cardboard.   8 partition (1) according to one of claims 3 to 7, wherein the unit spaces are divided by a network (6), this network not being glued to the set of plates (3).   9 Partition (1) according to one of claims 1 to 8, wherein the plates (3) are plasterboards.   Partition (1) according to claim 8 or 9, comprising top rails (4a) and bottom holding the uprights and between which the network (6) is maintained.   11 Partition (1) according to claim 10, wherein the top rails (4 a) and bottom include pre-cut tabs (7 a, 25 7 b) foldable inwardly and inserting into the network (6).   12 A method of manufacturing a partition (1) according to one of claims 1 to 11, comprising the supply of a plurality of uprights (2 a, 2 b) and a plurality of plates (3), and the division of the unit spaces delimited by the uprights and the plates (3).   13 Method according to claim 12 for the manufacture of a partition (1) according to claim 10 or 11, in which the network (6) is attached to one of the rails, the network (6) is extended to the other rail and we fix it on the latter.