FR2618822A1 - Self-supporting structure intended for acoustic insulation and correction and its construction process - Google Patents

Abstract

Self-supporting structure suitable for the construction of panels intended for acoustic insulation and correction of the kind including at least one hollow rigid section, preferably of rectangular section, continuously open on one of its large sides by a slot 2 less wide than the width of this large side and centred on its longitudinal median axis, specially shaped to receive the edges of thin, rigid, plates, nonperforated 3 or perforated 3', with the edges folded in such a way 4 that they can be inserted totally or partially into the section 1 through the slot 2 or be positioned on the outside of this section.

Description

The present invention relates generally to the acoustic insulation and correction of any room, in particular for industrial use, and it relates more particularly to what is agreed to be called an acoustic panel, whether this is used to insulate a particular volume or that it is placed in an existing space or at the limits of this space to make corrections to the initial acoustic and possibly thermal characteristics.

The most commonly used acoustic panels to date, whatever the techniques used to make and use them, can be classified into two main categories: panels which are specifically intended for sound insulation and panels which are specifically intended for acoustic correction.

These acoustic panels are not without offering the services requested, but they are not immune to the following drawbacks - first and foremost these panels are fixed in a limited and conventional range whose operation removes any possibility of adapting them exactly to the problems acoustics installed and even in the places for which they are intended.The qualities and specific characteristics of these panels, produced each time for a very specific case, exclude any possibility of extrapolation for neighboring cases. or for any other reason requiring the unexpected modification of a project, there is no other recourse than that of replacing the inadequate panels.

- in addition, these panels with acoustic and geometrical characteristics fixed once and for all are delivered ready to use. Generally formed from thin metallic plates, ribbed according to a precise pitch, folded at the edges according to complex folding techniques (overlaps in overlaps with several plies), assembled around a central insulation by gluing, riveting, crimping or welding - all assembly precautions aimed at ensuring correct rigidity in handling and good resistance over time of these panels - there can be no question transform them on site to change their characteristics or use. They are finished industrial products.

- Finally, these panels, even self-supporting, cannot be put in place without the help of a more or less complicated network of posts and beams, which makes supplies and assemblies complex.

 The present invention generally relates to a structure which, suitable for constituting acoustic panels having acoustic insulation or acoustic correction properties or these two properties combined in the same panel, advantageously makes it possible to minimize or even to cancel the disadvantages succinctly set out above, while bringing other advantages.

 This structure is of the type comprising a hollow, rigid profile, preferably of rectangular section, for example metallic, one of the long sides of which is open over the entire length of the profile by a cutout which takes into account only part of the surface on this side -on either side of the longitudinal center line of said side.

This partially closed U-shaped profile serves both as an assembly element for the thin plates associated with it and which constitute the facade of the acoustic panels and serves as a load-bearing and holding element on the site of use, in vertical, horizontal or inclined parts. The cut-out in the profile also allows the passage of an insulator whose role will be to correct the cavity effect inherent in the shape of the profile and to ensure a homogeneous, acoustic cover, across the entire width of the panel.

The cutout arranged in the profile is also capable of receiving - by fitting out suitable dimensions - one or more profiles according to the invention, presented by their smaller side and engaged in this cutout, so that it is possible to constitute a network of self-supporting framework, load-bearing, by the cross-play of these profiles arranged at the desired pace.

On the other hand, this judiciously cut profile can be advantageously used to finish the uncovered sections of the aoeus tick panels, either by covering or by insertion.

 This structure, moreover, is generally characterized by the fact that are associated with this profile, thin, rigid plates, drilled in whole or in part or not, of desired length and width.

These thin plates already acquire their rigidity from their folded edges in harmony with the geometry of the profiles before being associated with them, which will give them their final rigidity. They can also be ribbed. In addition, the folding of the edges of these thin plates (the long sides, for example if they are rectangular) is provided so that the dimensions of this folding correspond to the short sides of the profile and to the returns left free on either side of the cut made precisely on this profile.

 The adjustment of the thin plates to the profile, to produce homogeneous finished acoustic panels, is done either by introducing the edges of the plates thus folded into the profile by the cut-out arranged therein, or by positioning these same edges of plates out of the profile but in contact with it, always keeping a correspondence between the specific geometry of the folding of the edges of the thin plates and the general shape of the profile. In the latter case of association we can have recourse, very punctually, to the means conventional screwing or riveting, to ensure good cohesion between the profiles and the plates.

 By first assuming that the long sides of the profile are perpendicular to the facade plane of the finished acoustic panels, we observe that - acoustic panels whose thickness is less than the overall dimensional value of the long sides of the profile can be produced This is precisely the case for mounting where all the lateral folding of the thin plates is introduced into the profile. The acoustic panel thus produced appears hollow and the profiles stand out in a sharp frame. This can in itself be an advantage decorative and offers the possibility of fixing various easements on the exposed profiles.

- acoustic panels for which - thanks to the possibilities of positioning the lateral folds of the thin plates on the short sides of the profile, for example by simply inverting the said plates, it is easy to obtain either a general alignment in the bare of the small sides of the profile or a general overflow of the thin plates which has the effect of positioning the profile hollow.

 Of course, all kinds of intermediate or variegated assemblies are possible, which consequently gives all kinds of thicknesses of acoustic panels, objects of the invention, whether these panels are aligned with the profiles or are offset by one one way or another.

As the acoustic insulation and correction of the acoustic panels commonly encountered depend first of all on the spacing of the thin plates which generally constitute them, this spacing can be chosen according to the acoustic requirements by combining, through the panel elements acoustics object of the invention, the possibilities of junction or contact between the profile and the thin plates.

 Also according to the invention, it is possible to combine acoustic insulation (provided by non-perforated plates) and acoustic correction (provided by perforated plates) by combining these two types of plates and combining their lateral folds so that these two acoustic functions can be felt correctly, thus obtaining either acoustic panels with predominantly insulation (large spacing between non-perforated plates) and low acoustic correction (small spacing between perforated and non-perforated plates), or acoustic panels with insulation and balanced acoustic correction (equal spacing of perforated and non-perforated plates), or any other nuance in the acoustic effects sought outside the two examples just given.

 It is advantageous to have conventional insulating products, such as glass or rock fibers, between the thin plates, perforated or non-perforated. It should be noted that the judicious choice of thickness and elasticity (in accordance with the desired purpose) of insulation allows effects to be obtained which result in maintaining a constant spacing of the thin plates opposite one another. Thus in the case of mounting "hollow" of the acoustic panels (folding lateral thin plates fully inserted into the profile, by cutting in this profile), we get a very good mounting cohesion and even some disassembly.This excludes all ancillary means of screwing or riveting.

 In the case of acoustic correction at the limits of a room (for example against a wall, a ceiling, a roof, etc.) it suffices to arrange and fix a row of profiles according to the invention along these walls to process and then have a single row of thin perforated sheets, looking for the best possible combination of profiles / sheets for the targeted acoustic performance.

 Doors, suspended baffles, mobile partial screens, screens along the motorway ... can advantageously be produced according to the invention.

 In the raw state, the structure according to the invention is reduced to a semi-finished product consisting of a rigid, hollow profile, open continuously on one side, and of thin plates, perforated or non-perforated having lateral folds allowing them to be easily associated with the profile, it is up to the user to assemble all these elements as he sees fit to make a finished product, in the form of an acoustic panel, perfectly suited to the aim pursued and capable of '' be changed over time if the need arises.

As in the state of the invention> the user can make all the products commonly used today, especially in industrial acoustics such as: partitions, screens, suspended baffles, doors, lining of walls, silencer slides. independence of the elements, profiles and thin plates, and the possibility of assembling them in a way outside of any pre-established range, constitute in themselves an advantage both in terms of checking and maintaining the assemblies and in terms of assembly and hanging of the finished elements on the chosen site.

The characteristics and advantages of the invention will become apparent from the description which follows, by way of example, with reference to the appended schematic drawings in which
FIG. 1 is a partial view in cross section of the main elements, objects of the invention,
FIG. 2 is a partial view in cross section of the main elements, objects of the invention assembled between them to give an acoustic panel with only one side,
FIG. 3 is a partial view in cross section of the main elements, objects of the invention assembled between them to form an acoustic panel with two sides,
FIG. 4 is a partial view in cross section of the main elements, objects of the invention, in different configurations of symmetrical arrangements,
FIG. 5 is a partial cross-sectional view of the main elements, objects of the invention, in the mounting configuration associating insulation and acoustic corrections,
FIG. 6 is a partial view in cross section of the main elements, objects of the invention, in different configurations of non-symmetrical arrangements,
FIG. 7 is a partial perspective view of an assembled acoustic panel, closed by a profile element,
Figure 8 is a partial perspective view of an assembly of two sections to form a load-bearing structure.

These figures illustrate, by way of example, the application of the invention to the construction of acoustic panels,
FIG. 1 represents the two main elements according to the invention produced from a section of rectangular section 1) open continuously on one of its long sides by a cut 2) centered on the longitudinal median axis of this large side, and a thin plate 3) two of its sides of which are folded at 4) in a geometrical configuration with the specific shape of the profile,
FIG. 2 represents these two basic elements such as the profile 1) and the thin plate specially folded at its edges 4) assembled by fitting through the cutout 3),
Figure 3 shows that the profiles 1) and thin plates 3) with folded edges 4) assembled around an insulating material 5) give rise to the construction of an acoustic panel.

Figure 4 shows how we can assemble the elements 1) and 3) thanks to the folds of the thin plates 4) by choosing either to accommodate the plate edges in the profile (in whole or in part) or to position these plate edges outside the profiled,
FIG. 5 shows different possibilities for mounting acoustic panels by combining the insulations (non-perforated plates) and the acoustic corrections (perforated plates) in the same panel where we find associated with the profile 1), housed in its cutout 2) the folded edges 4) of non-perforated thin plates 3) and perforated 3 ') - thin plates themselves associated with insulators of variable thickness 5). The folded edges can be rejected out of the profile.

Figure 6 is similar to the previous figure with assemblies of elements according to the invention arranged asymmetrically
FIG. 7 shows how the profile 1) and its cutout 2) can be used to finish the edges of the acoustic panels produced according to the method. By the combined play of the elasticity of the insulation 5) and of the closure part of slightly oversized edge, an autonomous acoustic panel is obtained without screwing.

 FIG. 8 shows that by uniformly dimensioning the short sides of the profile 1) and the width of the cutout 2), it is possible to interlock the profiles 1) between them to the point of producing autonomous frame elements.

Claims (7)

RE \ tNDI CATIONS  1- Self-supporting structure, suitable for constituting panels intended for sound insulation and for acoustic correction, of the type comprising at least one rigid rigid section, preferably of rectangular section 1) continuously open on one of its long sides by a cut 2) less in width than the width of this large side and centered on the longitudinal median axis thereof, suitable for receiving the edges of thin, rigid non-perforated plates 3) or perforated 31), folded edges of such so 4) that they can be fully or partially inserted into the profile 1) through the cutout 2), or position themselves outside of this profile with which they fully or partially conform to the particular geometrical configuration.  2- Self-supporting structure, suitable for constituting panels intended for acoustic insulation and for acoustic correction, according to claim 1- in that the thin plates, perforated or non-perforated, offer variable thicknesses of acoustic panels by the mere fact of their positioning, by their specially folded edges 4), relative to the profile.  3- Self-supporting structure, suitable for constituting panels intended for acoustic insulation and for acoustic correction, according to claims 1- and 2- in that the thin plates can be combined with one another to give panels insulation (with non-perforated plates 3)) or corrective panels (with perforated plates 3 ')) or mixed panels providing both acoustic insulation and correction.  4- Self-supporting structure, suitable for constituting panels intended for acoustic insulation and for acoustic correction, according to claims 1-, 2-, 3-, in that an insulating material of thickness and elasticity adapted to the aim pursued, disposed between the plates 3) and 3 ′), ensures their permanent separation as a spring working for crushing between these two types of plates would do.  5- self-supporting structure, suitable for the constitution of panels intended for acoustic insulation and correction, according to claim 1- characterized in that by cutting 2) a profile can be inserted perpendicular to this profile, the Extremity of another profile according to the invention presented, by the short side, at the opening of the cut 2).  6- Self-supporting structure, suitable for constituting panels intended for acoustic insulation and correction, according to claims 1-, 5-, in that the insertion of the profiles 1) relative to each other allows the setting in instead of a self-supporting frame.  7- Self-supporting structure, suitable for constituting panels intended for sound insulation and for acoustic correction according to claims 1-, 5-, 6-, in that the profile 1) can advantageously be used to constitute a piece of closing of the sections of the acoustic panels produced according to the invention.