Structural element for a soundproof wall system

Abstract

The present invention relates to a structural element of a soundproof wall system, the element being at least partially formed by a monolithic profile comprising a first lateral wall and a second lateral wall opposite the first wall with respect to the profile, the structural element comprising a first face of the profile and a stop element forming a stop and arranged opposite the first face, the first face and the stop element being separated by a gaseous phase, the geometry of the structural element being configured such that pressure exerted on the first wall in the direction of the second wall and / or on the second wall in the direction of the first wall results in contact between the first face and the stop element. FIG. 9

Description

Title of the invention: Framing element for a soundproofing wall system Field of invention

[0001] The present invention relates to an acoustic insulation wall system and in particular to a wall system comprising a core formed by a metal frame. State of the art

[0002] It is known to manufacture a drywall panel comprising a core and two facing plates, for example made of plaster, fixed on either side of the core. The core may be formed by a frame, for example a metal frame. The frame may comprise furring strips, uprights, rails, angles and / or spacers. Each of these elements may be metallic.

[0003] With reference to [Fig. 1], it is for example known to manufacture an upright formed by a metal profile having a U-shaped section, that is to say having a first wall 5 and a second wall 6 connected by a base 19 of the upright. Such an upright has a sufficiently high stiffness for the panel to have a mechanical resistance meeting the criteria imposed by the construction of buildings. However, when using such an upright to manufacture the panel, the increase in the stiffness of the upright results in a reduction in the acoustic insulation of the partition panel. Indeed, an upright having a high stiffness allows transmission of an acoustic wave between the two plates without decoupling of the wave.

[0004] To this end, document WO 2012 / 131284 describes a partition wall upright comprising two parts separated from each other. Each of the parts comprises a side wall of the upright. The two parts are connected by an element formed by a material allowing acoustic decoupling. However, the manufacture of such an upright is complex, because it comprises separate manufacturing steps for each of the parts and a step of bonding each of the parts to the element allowing acoustic decoupling. In addition, the upright described has a lower mechanical strength than an upright without the element allowing acoustic decoupling when applying high loads. Statement of the invention

[0005] An aim of the invention is to propose a solution for manufacturing an acoustic insulation wall system, in particular a drywall panel, while reducing the quantity of material required for the manufacture of the system compared to known systems so as to reduce the carbon footprint associated with its manufacture.

[0006] This object is achieved within the scope of the present invention by means of a framework element of a soundproofing wall system, the element extending in a main direction and being at least partly formed by a monolithic profile comprising a first side wall adapted to be fixedly mounted to a first facing plate and a second side wall opposite the first wall with respect to the profile and adapted to be fixedly mounted to a planar wall structure, preferably to a second facing plate, the first wall and the second wall extending parallel in the main direction, the framework element comprising a first face of the profile and a stop element forming a stop and arranged opposite the first face, the first face and the stop element being separated by a gas phase,the geometry of the frame element being configured so that pressure exerted on the first wall towards the second wall and / or on the second wall towards the first wall causes contact between the first face and the stop element.

[0007] The present invention is advantageously supplemented by the following characteristics, taken individually or in any of their technically possible combinations:

[0008] - the profile is formed by a material chosen from metal and wood,

[0009] - the profile is formed by a metal sheet having a thickness less than 0.4 mm and preferably less than 0.3 mm,

[0010] - the first face and / or the stop element, preferably the first face and the stop element, are formed by the profile,

[0011] - the stop element is a second face of the profile,

[0012] - the frame element has a configuration in which, in the absence of a pressure exerted on the first wall in the direction of the second wall and / or on the second wall in the direction of the first wall, the first face and the stop element are at a distance from each other, a maximum distance between the first face and the stop element being less than or equal to a limit length ôUm between 1 pm and 5 mm, in particular between 5 pm and 2 mm, and preferably between 10 pm and 1 mm,

[0013] - the frame element has a first stiffness ki in compression strictly less than 30,000 N.m1, in particular strictly less than 20,000 N.m1, the first stiffness ki being measured by deforming the frame element of a first length ôi in a direction perpendicular to the main direction by pressure between the first wall and the second wall, the first length ôi being less than or equal to a limit length ôiim,

[0014] - the first stiffness ki is measured for a deformation excitation frequency of the frame element between 5 Hz and 30 Hz,

[0015] - the frame element has a second stiffness k2 in compression greater than 30,000 N.m1, the second stiffness k2 being measured by deforming the frame element by a second length ô2 in a direction perpendicular to the main direction by pressure between the first wall and the second wall, the second length ô2 being strictly greater than the limit length ôUm,

[0016] - the second stiffness k2 is measured for a deformation excitation frequency of the frame element between 5 Hz and 30 Hz,

[0017] - the profile comprises two ends, each of the ends extending along the main direction, the profile comprising a first fold formed along an axis parallel to the main direction, the first face being formed between the first fold and one of the two ends, the stop element preferably being a second face and the profile preferably comprising a second fold formed along an axis parallel to the main direction, the second face being formed between the second fold and the other of the two ends,

[0018] - the profile comprises a fold oriented along an axis parallel to the direction main, the folding comprising the first face and the stop element,

[0019] - the frame element comprises a stiffening part, the stiffening part being fixedly mounted to the profile between the first wall and the second wall, the first face being formed by the profile and the stop element being formed by the stiffening part,

[0020] - the frame element comprises a plurality of stiffening parts, the parts stiffening being mounted fixed to the frame element so as to be distributed along a length of the frame element in the main direction,

[0021] - the stiffening part extends in the main direction over a length su greater than or equal to one third of a length of the frame element in the main direction, in particular greater than or equal to half of a length of the frame element in the main direction,

[0022] - the stiffening part is removably mounted on the frame element,

[0023] - the stiffening piece is clipped to the frame element,

[0024] - the stiffening part is screwed to the frame element,

[0025] - the first wall and the second wall are connected by a base, the base comprising a plurality of recesses,

[0026] - the first wall and the second wall are connected by a base, the element frame comprising a stiffening part formed by folding a portion of the base between the first wall and the second wall, the portion being formed by an incision in the base.

[0027] Another aspect of the invention is an upright for a frame formed by a frame element according to an embodiment of the invention.

[0028] Another aspect of the invention is a frame element of a soundproofing wall system, preferably a drywall panel, the element extending in a main direction and being at least partly formed by a monolithic profile comprising a first side wall adapted to be fixedly mounted to a first facing plate and a second side wall opposite the first wall with respect to the profile adapted to be fixedly mounted to a planar wall structure, preferably to a second facing plate, the first wall and the second wall extending parallel in the main direction, the frame element comprising a first face of the profile and a stop element forming a stop and arranged opposite the first face, the first face and the stop element being separated by an acoustic damping part,the geometry of the frame element being configured so that pressure exerted on the first wall in the direction of the second wall and / or on the second wall in the direction of the first wall causes the first face and the stop element to move closer together.

[0029] Advantageously, the acoustic damping part is formed by a material having a Young's modulus of less than 500 MPa and a loss factor q of greater than 0.1.

[0030] Another aspect of the invention is an acoustic insulation wall system, comprising: - a core formed by a frame extending along a main plane, the frame comprising a frame element according to one embodiment of the invention, - a first facing plate and a planar wall structure, the first plate and the structure being arranged on either side of the frame and each extending in a plane parallel to the main plane, the first plate being fixedly mounted to a first side wall of the frame element and the structure being fixedly mounted to the second side wall of the frame element.

[0031] Advantageously, the structure is a second facing plate, the system forming a drywall panel.

[0032] Advantageously, the system has a third stiffness k3 in compression strictly less than 30,000 N.m1, in particular strictly less than 20,000 N.m1, the third stiffness k3 being measured by deforming the first plate by the first length ôi in a direction perpendicular to the main plane at a point on the first plate, the first length ôi being less than or equal to the limit length Ôlim-

[0033] The third stiffness k3 is advantageously measured for a deformation excitation frequency of the first plate between 5 Hz and 30 Hz.

[0034] Advantageously, the system has a fourth stiffness k4 in compression strictly greater than the third stiffness k3, the fourth stiffness k4 being measured by deforming the first plate of the second length ô2 in a direction perpendicular to the main plane at the point of the first plate, the fourth stiffness k4 being preferably greater than 30,000 N.m1.

[0035] The fourth stiffness k4 is advantageously measured for a deformation excitation frequency of the first plate between 5 Hz and 30 Hz.

[0036] Another aspect of the invention is a method of manufacturing a frame element according to an embodiment of the invention, the frame element comprising a stiffening part, the stiffening part being fixedly mounted to the profile between the first wall and the second wall, the first face being formed by the profile and the stop element being formed by the stiffening part, the method comprising a step of mounting the stiffening part to the profile, preferably by clipping, gluing and / or screwing.

[0037] Another aspect of the invention is a method of manufacturing a soundproofing wall system, the system being a system according to one embodiment of the invention, the system comprising a frame element according to one embodiment of the invention and comprising a stiffening part, the stiffening part being fixedly mounted to the profile between the first wall and the second wall, the first face being formed by the profile and the stop element being formed by the stiffening part, the method comprising a step of screwing, by the same screw, both the stiffening part to the profile and both the first facing plate or the structure to the profile. Description of figures

[0038] Other characteristics, aims and advantages of the invention will emerge from the following description, which is purely illustrative and non-limiting, and which must be read in conjunction with the appended drawings in which:

[0039] [Fig-1] - [Fig.l] schematically illustrates a known frame element,

[0040] [Fig.2] - [Fig.2] schematically illustrates a frame element according to a method of realization of the invention,

[0041] [Fig.3] - [Fig.3] illustrates a variation in the stiffness of a frame element according to an embodiment of the invention with a displacement of the first wall of the element,

[0042] [Fig.4] - [Fig.4] schematically illustrates a frame element according to a method of realization of the invention,

[0043] [Fig.5] - [Fig.5] schematically illustrates a frame element according to a method of realization of the invention,

[0044] [Fig.6] - [Fig.6] schematically illustrates a frame element according to a method of realization of the invention,

[0045] [Fig.7] - [Fig.7] schematically illustrates a frame element according to one embodiment of the invention,

[0046] [Fig.8] - [Fig.8] schematically illustrates a frame element according to one embodiment of the invention,

[0047] [Fig.9] - [Fig.9] schematically illustrates a frame element according to one embodiment of the invention,

[0048] [Fig. 10] - [Fig. 10] schematically illustrates a frame element according to one embodiment of the invention,

[0049] [Fig. 11] - [Fig. 11] schematically illustrates a frame element according to one embodiment of the invention,

[0050] [Fig. 12] - [Fig. 12] schematically illustrates a frame element according to one embodiment of the invention,

[0051] [Fig. 13] - [Fig. 13] schematically illustrates a frame element according to one embodiment of the invention,

[0052] [Fig. 14] - [Fig. 14] schematically illustrates a frame element according to one embodiment of the invention,

[0053] [Fig. 15] - [Fig. 15] schematically illustrates a frame element according to one embodiment of the invention,

[0054] [Fig. 16] - [Fig. 16] schematically illustrates a frame element according to one embodiment of the invention,

[0055] [Fig. 17] - [Fig. 17] schematically illustrates a frame element according to one embodiment of the invention,

[0056] [Fig. 18] - [Fig. 18] schematically illustrates a system according to an embodiment of the invention and more particularly a drywall panel,

[0057] [Fig. 19] - [Fig. 19] schematically illustrates a system according to an embodiment of the invention and more particularly a drywall panel,

[0058] [Fig.20] - [Fig.20] illustrates sound insulation performances of known systems and systems according to embodiments of the invention,

[0059] [Fig.21] - [Fig.21] schematically illustrates a frame element comprising a stiffening part,

[0060] [Fig.22] - [Fig.22] schematically illustrates a frame element comprising a stiffening part formed by a part of a base of the element folded between the walls of the element,

[0061] Throughout the figures, similar elements bear identical references. Definitions

[0062] A stiffness, in particular a stiffness of a frame element in compression between two points or two surfaces, can be calculated in a known manner using a computer program implementing a digital mechanical simulation of the element by the finite element method. In particular, such a simulation can be implemented by predetermining the element geometry, the element material, and the boundary conditions applied to the framing element and / or the system, in particular to the drywall panel. The paper Guigou-Carter et al. (Guigou-Carter, C., Foret, R., Igeleke, A., & Bailhache, S., 2012, April, Characterization of metallic studs used in gypsum board single frame walls, in Acoustics 2012) describes a method for measuring a compressive stiffness of framing elements and drywall panels comprising framing elements using finite element modeling.

[0063] In the present invention, the term "stiffness" means a stiffness measured at an excitation frequency of the element whose stiffness is measured between 5 Hz and 30 Hz. This frequency range defines a regime called "quasi-static". Indeed, this frequency range makes it possible to measure a stiffness independent of the dimensions of the element and the boundary conditions applied at the edge of the element. Detailed description of the invention

[0064] General architecture of element 1 of framework 2

[0065] With reference to [Fig. 2], one aspect of the invention is a frame element 1 of a soundproofing wall system 15. The element 1 extends along a main direction 3. The element 1 is at least partly formed by a monolithic profile 4. The profile 4 comprises a first side wall 5 adapted to be fixedly mounted to a first facing plate 17 of a soundproofing wall system 15, preferably a drywall panel. The profile 4 comprises a first side wall 5 adapted to be fixedly mounted to a second side wall 6 opposite the first wall 5 with respect to the profile 4. The second side wall 6 is adapted to be fixedly mounted to a planar wall structure 18, preferably to a second facing plate. The first wall 5 and the second wall 6 extend parallel in the main direction 3. The frame element 1 2 comprises a first face 7 of the profile 4 and a stop element 8 forming a stop.The stop element 8 is arranged opposite the first face 7. The first face 7 and the stop element 8 are separated by a gas phase, in particular by air. The geometry of the frame element 1 of the frame 2 is configured so that a pressure exerted on the first wall 5 in the direction of the second wall 6 and / or on the second wall 6 in the direction of the first wall 5 causes contact between the first face 7 and the stop element 8. Thus, it is possible to simply manufacture, from a single monolithic profile 4, a frame element having, on the one hand, a sufficiently high stiffness to allow the system to have sufficient mechanical strength when the pressure exerted on one of the walls causes contact between the first face 7 and the element. stop 8 and, on the other hand, a stiffness small enough to dampen acoustic waves incident on a wall of the system 15 when the pressure exerted by an acoustic wave on one of the walls does not cause contact between the first face 7 and the stop element 8. Such non-linearity of the stiffness of the frame element makes it possible to manufacture a system 15, and preferably a drywall panel, having superior acoustic insulation to a known system for equal mechanical resistance.

[0066] The profile 4 may be formed by a material chosen from metal, a polymer material and wood, and preferably may be formed by metal.

[0067] With reference to [Fig. 3], a variation in the stiffness of the frame element 1 2, for a pressure exerted on the first wall 5 in the direction of the second wall 6 and / or on the second wall 6 in the direction of the first wall 5, has two distinct regimes. In a first regime, the first face 7 is not in contact with the stop element 8. The frame element 1 2 has a minimum stiffness and does not vary substantially with the pressure exerted. This first regime is illustrated by [Fig. 3] for a relative displacement of the first face 7 with respect to the stop element 8 of between 0.3 mm and 0.9 mm. In a second regime, the first face 7 is in contact with the stop element 8. The frame element 2 has an increasing stiffness with the pressure exerted, which corresponds to the deformation of the profile 4. This regime is illustrated by [Fig.3] for a relative displacement of the first face 7 with respect to the stop element 8 of between 0.9 mm and 1.6 mm.

[0068] The profile 4 may be formed by a metal sheet having a thickness of less than 0.4 mm and preferably less than 0.3 mm. Indeed, in a known frame element, a profile has a thickness strictly greater than 0.4 mm, so as to have sufficient mechanical resistance to deformation for the use of the element in the field of building construction, without however allowing sufficient acoustic insulation. Due to the non-linear rigidity of the element 1, it is possible to reduce the thickness of the profile 4 for equal mechanical rigidity in the second stiffness regime.It is thus possible to reduce the quantity of material used for the manufacture of the profile 4, while presenting mechanical properties in the second regime comparable to those presented by a known element and by increasing the acoustic insulation properties of a system comprising the element 1 with respect to a system comprising the known element.

[0069] The first wall 5 and the second wall 6 may be connected by a base 19. The base 19 may comprise a plurality of recesses 20. Due to the non-linear rigidity of the element 1, it is possible to increase the proportion of the base 19 having recesses for equal mechanical rigidity in the second stiffness regime. It is thus possible to reduce the quantity of material used for the manufacture of the profile 4, while exhibiting mechanical properties in the second regime comparable to those exhibited by a known element 1 and increasing the acoustic insulation properties of a system comprising element 1 with respect to a system comprising the known element.

[0070] With reference to [Fig. 2], the element 1 may have a configuration in which, in the absence of pressure exerted on the first wall 5 in the direction of the second wall 6 and / or on the second wall 6 in the direction of the first wall 5, the first face 7 and the stop element 8 are at a distance from each other, and a maximum distance between the first face 7 and the stop element 8 is less than or equal to a limit length δUm of between 1 μm and 5 mm, in particular of between 5 μm and 2 mm, and preferably of between 10 μm and 1 mm. Thus, the element 1 has a first stiffness regime adapted to allow the first wall 5 and / or the second wall 6 to be displaced within a range of displacement amplitudes exerted by audible acoustic waves. Element 1 may have a first stiffness ki in compression strictly less than 30,000 Nm', and preferably strictly less than 20,000 N.m ', the first stiffness ki being measured by deforming the frame element 1 2 by a first length ôi in a direction perpendicular to the main direction 3 by pressure between the first wall 5 and the second wall 6, the first length ôi being less than or equal to a limit length ôiim. The element 1 may have a second stiffness k2 in compression greater than 30,000 Nm ', preferably greater than 50,000 Nm ', the second stiffness k2 being measured by deforming the frame element 1 2 by a second length ô2 in a direction perpendicular to the main direction 3 by pressure between the first wall 5 and the second wall 6, the second length ô2 being strictly greater than the limit length ôUm. .

[0071] The element 1 may be an element chosen from a frame upright, a furring, a rail, an angle iron, a spacer or a point support device adapted for the bracing of the first plate and the structure. Preferably, the element 1 is an upright. The upright is adapted to receive one or more facing plate(s). In the case where the element 1 is a point support device, the core may be formed by a two-dimensional network of point support devices.

[0072] 15-Wall Sound Insulation System

[0073] With reference to [Fig.18] and [Fig.19], another aspect of the invention is a soundproofing wall system 15. The system 15 comprises a core formed by a frame 2 extending along a main plane 16. The frame 2 comprises a frame element 1 2. The system 15 comprises a first facing plate 17 and a planar wall structure 18.

[0074] The planar wall structure 18 may be chosen from a wall, a second plate facing, for example a second plasterboard facing, a floor and a ceiling. In the case where the structure 18 is a second facing board, the system 15 forms a drywall panel. The structure 18 may also be made of concrete.

[0075] The first plate 17 and the structure 18 are arranged on either side of the frame 2 and each extend in a plane parallel to the main plane 16. The first plate 17 is fixedly mounted to the first side wall 5 of the frame element 1 of the frame 2. The structure 18 is fixedly mounted to the second side wall 6 of the frame element 1 of the frame 2.

[0076] The system 15 may have a third stiffness k3 in compression strictly less than 30,000 N.m1, preferably strictly less than 20,000 N.m1, the third stiffness k3 being measured by deforming the first plate 17 by the first length ôi in a direction perpendicular to the main plane 16 at a point on the first plate 17. The first length ôi is less than or equal to the limit length ôiim.

[0077] The system 15 may have a fourth stiffness k4 in compression strictly greater than the third stiffness k3, the fourth stiffness k4 being measured by deforming the first plate 17 by the second length ô2 in a direction perpendicular to the main plane 16 at the point of the first plate 17, the fourth stiffness k4 being preferably greater than 30,000 N.nr1.

[0078] Thus, it is possible to simply manufacture, from a frame element 1 of a frame 2 according to an embodiment of the invention, a soundproofing wall system 15 having, on the one hand, a stiffness large enough to have sufficient mechanical strength when the pressure exerted on one of the walls causes contact between the first face 7 and the stop element 8 and, on the other hand, a stiffness small enough to dampen acoustic waves incident on a wall of the system 15 when the pressure exerted by an acoustic wave on one of the walls does not cause contact between the first face 7 and the stop element 8. Such non-linearity of the stiffness of the system 15, conferred by the element 1, allows the system 15 to have superior soundproofing to known soundproofing wall systems.

[0079] Configurations of the frame element 1 2

[0080] With reference to [Fig.2], [Fig.4], [Fig.5], [Fig.6], [Fig.7], [Fig.8], [Fig.9] and [Fig.10], the first face 7 and / or the stop element 8, preferably the first face 7 and the stop element 8, are formed by the profile 4. In particular, the stop element 8 may be a second face of the profile 4. Thus, the quantity of material used for the manufacture of the profile 4 is reduced compared to the quantity of material used for a known profile.

[0081] With reference to [Fig.2], [Fig.4], [Fig.8], [Fig.9] and [Fig.10], the profile 4 comprises two ends 10. Each of the ends 10 extends along the main direction 3. The profile 4 may comprise a first fold 11 formed along an axis parallel to the main direction 3. The first face 7 may be formed between the first fold 11 and one of the two ends 10. The stop element 8 may be a second face and the profile 4 may comprise a second fold 12 formed along an axis parallel to the main direction 3, the second face being formed between the second fold 12 and the other of the two ends. Thus, it is possible to simplify the manufacture of the element 1.

[0082] With reference to [Fig.5], [Fig.6] and [Fig.7], the profile 4 may comprise a fold 13 oriented along an axis parallel to the main direction 3, the fold comprising the first face 7 and the stop element 8. Thus, it is possible to simplify the manufacture of the element 1 while keeping a known geometry of the ends 10, so as to ensure assembly compatibility with other known parts of a frame.

[0083] Stiffening part 14

[0084] With reference to [Fig.11], [Fig.12], [Fig.13], [Fig.14], [Fig.15], [Fig.21] and [Fig.22], the element 1 may comprise a stiffening piece 14. The stiffening piece 14 may be fixedly mounted to the profile 4 between the first wall 5 and the second wall 6. The first face 7 may be formed by the profile 4 and the stop element 8 may be formed by the stiffening piece 14. Thus, it is possible to manufacture an element 1 by mounting a stiffening element 14 on a known frame element.

[0085] The element 1 may comprise a plurality of stiffening pieces 14. The stiffening pieces 14 may be fixedly mounted to the frame element 1 of the frame 2 so as to be distributed along a length of the frame element 1 of the frame 2 in the main direction 3. Thus, the frame element may comprise a plurality of stop elements 8, distributed along the profile 4. This configuration makes it possible to simplify the manufacture of the stiffening pieces 14. Indeed, the use of point stiffening pieces makes it possible to adapt to different lengths of a profile 4.

[0086] The stiffening part 14 may extend along the main direction 3 over a length greater than or equal to one third of a length of the frame element 1 2 along the main direction 13, and in particular greater than or equal to half of a length of the frame element 1 2 along the main direction 13 and preferably equal to the length of the frame element 1 2 along the main direction 13. Thus, it is possible to limit the number of stiffening parts 14 to be installed and thus to reduce the assembly time of the frame element 1 2.

[0087] The stiffening part 14 can be removably mounted to the frame element 1 of the frame 2. In particular, the stiffening part 14 can be clipped to the element 1 frame element 2. Thus, it is possible to simplify the transformation of a known frame element into a frame element 1 according to an embodiment of the invention. The stiffening piece 14 can be screwed to the frame element 1 2. Thus, it is possible to simplify the manufacture of a system 15 comprising an element 1, itself manufactured from a known frame element, by screwing together at the same time a facing plate, the known element and the stiffening piece 14.

[0088] With reference to [Fig.22], the first wall 5 and the second wall 6 may be connected by the base 19 and the stiffening part 14 may be formed by folding a portion of the base 19. The folding of the portion is implemented between the first wall 5 and the second wall 6. The portion is formed by an incision of the base 19. The stop element 8 may then be formed by an edge of the portion and the first face 7 may be formed by the first wall 5 and / or the second wall 6, in particular by the first wall 5 in the embodiment illustrated by [Fig.22].

[0089] Element 1 comprising an acoustic damping part 9

[0090] With reference to [Fig. 16] and [Fig. 17], another aspect of the invention is a frame element 1 of a soundproofing wall system 15, in which the first face 7 and the stop element 8 are separated by an acoustic damping part 9. In this embodiment of the invention, the geometry of the frame element 1 is configured so that pressure exerted on the first wall 5 in the direction of the second wall 6 and / or on the second wall 6 in the direction of the first wall 5 causes the first face 7 and the stop element 8 to move closer together. The movement can cause the acoustic damping part 9 to be compressed.Thus, it is possible to simply manufacture, from a single monolithic profile 4 and a damping material, a frame element having, on the one hand, a stiffness large enough to allow the system 15 to have sufficient mechanical resistance when the pressure exerted on one of the walls causes contact between the first face 7 and the stop element 8 and, on the other hand, a stiffness small enough to dampen acoustic waves incident on a wall of the system 15 when the pressure exerted by an acoustic wave on one of the walls does not cause contact between the first face 7 and the stop element 8. Such non-linearity of the stiffness of the frame element makes it possible to manufacture a wall-mounted acoustic insulation system 15 having superior acoustic insulation to known systems.

[0091] The acoustic damping part 9 may be formed by a material having a Young's modulus of less than 500 MPa and a loss factor q of greater than 0.1. Thus, the vibration energy can be dissipated through the element 1 rather than through the air, which improves the dissipation efficiency.

[0092] Method of manufacturing the element 1 of the frame 2

[0093] Another aspect of the invention is a method of manufacturing a frame element 1 2. The frame element 1 2 comprises a stiffening part 14. The stiffening part 14 is fixedly mounted to the profile 4 between the first wall 5 and the second wall 6. The first face 7 is formed by the profile 4 and the stop element 8 is formed by the stiffening part 14. The method comprises a step of mounting the stiffening part 14 to the profile 4, preferably by clipping, gluing and / or screwing. Thus, it is possible to manufacture a frame element 1 2 according to an embodiment of the invention from a known frame element.

[0094] The method may comprise a step of screwing, by the same screw, both the stiffening part 14 to the profile 4 and both the first facing plate 17 or the structure 18 to the profile 4. Thus, it is possible to simplify the manufacture of a system comprising an element 1, itself manufactured from a known framework element, by stiffening the framework element with respect to a known element, which makes it easier for the screw to penetrate into the element 1.

[0095] Acoustic characterization

[0096] With reference to [Fig. 20], curve (c) illustrates an acoustic performance factor of a soundproofing wall system 15 comprising a stud formed by a frame element illustrated by [Fig. 1], comprising a profile having a thickness equal to 0.5 mm and having side walls with a length equal to 40 mm. Curve (d) illustrates an acoustic performance factor of a system 15 comprising a stud formed by a frame element illustrated by [Fig. 1], comprising a profile having a thickness equal to 0.3 mm and having side walls with a length equal to 40 mm. Curve (e) illustrates an acoustic performance factor of a system 15 according to an embodiment of the invention comprising a stud formed by a frame element 1 2 according to an embodiment of the invention illustrated by [Fig.4], comprising a profile having a thickness equal to 0.5 mm and having side walls with a length equal to 100 mm. Curve (f) illustrates acoustic insulation of a system 15 according to an embodiment of the invention comprising an upright formed by a frame element 1 2 according to an embodiment of the invention illustrated by [Fig.4], comprising a profile having a thickness equal to 0.3 mm and having side walls with a length equal to 100 mm.

Claims

Claims

1. Element (1) of a framework (2) of a soundproofing wall system, the element (1) extending in a main direction (3) and being at least partly formed by a monolithic profile (4) comprising a first lateral wall (5) adapted to be fixedly mounted to a first facing plate (17) and a second lateral wall (6) opposite the first wall (5) relative to the profile (4) and adapted to be fixedly mounted to a planar wall structure (18), preferably to a second facing plate, the first wall (5) and the second wall (6) extending parallel in the main direction (3), the element (1) of the framework (2) comprising a first face (7) of the profile (4) and a stop element (8) forming a stop and arranged opposite the first face (7), the first face (7) and the stop element (8) being separated by a phase gaseous,the geometry of the frame (2) element (1) being configured so that a pressure exerted on the first wall (5) in the direction of the second wall (6) and / or on the second wall (6) in the direction of the first wall (5) causes contact between the first face (7) and the stop element (8).,

2. Element (1) of a frame (2) according to the preceding claim, in which the profile (4) is formed by a metal sheet having a thickness of less than 0.4 mm and preferably less than 0.3 mm.

3. Frame element (1) (2) according to one of the preceding claims, in which the first face (7) and / or the stop element (8) are formed by the profile (4).

4. Element (1) of a frame (2) according to one of the preceding claims, the element having a configuration in which, in the absence of pressure exerted on the first wall (5) in the direction of the second wall (6) and / or on the second wall (6) in the direction of the first wall (5), the first face (7) and the stop element (8) are at a distance from each other, a maximum distance between the first face (7) and the stop element (8) being less than or equal to a limit length ôUm of between 1 pm and 5 mm.

5. Element (1) of a frame (2) according to claim 4, having a first stiffness ki in compression strictly less than 30,000 Nm *, the first stiffness ki being measured by deforming the element (1) of a frame (2) by a first length ôi in a direction perpendicular to the main direction (3) by pressure between the first wall (5) and the second wall (6), the first length ôi being less than or equal to a limit length ôUm.

6. Element (1) of a frame (2) according to claim 5, having a second stiffness k2 in compression greater than 30,000 N.m1, the second stiffness k2 being measured by deforming the element (1) of a frame (2) by a second length ô2 in a direction perpendicular to the main direction (3) by pressure between the first wall (5) and the second wall (6), the second length ô2 being strictly greater than the limit length ôUm.

7. Element (1) of a frame (2) according to one of the preceding claims, in which the profile (4) comprises two ends (10), each of the ends (10) extending in the main direction (3), the profile (4) comprising a first fold (11) formed along an axis parallel to the main direction (3), the first face (7) being formed between the first fold (11) and one of the two ends (10), the stop element (8) preferably being a second face and the profile (4) preferably comprising a second fold (12) formed along an axis parallel to the main direction (3), the second face being formed between the second fold (12) and the other of the two ends.

8. Element (1) of a frame (2) according to one of the preceding claims, comprising a stiffening part (14), the stiffening part (14) being fixedly mounted to the profile (4) between the first wall (5) and the second wall (6), the first face (7) being formed by the profile (4) and the stop element (8) being formed by the stiffening part (14).

9. Frame element (1) (2) according to one of the preceding claims, in which the stiffening part (14) is removably mounted to the frame element (1) (2).

10. Frame element (1) (2) according to one of the preceding claims, in which the first wall (5) and the second wall (6) are connected by a base (19), the frame element (1) (2) comprising a stiffening part (14) formed by folding a part of the base (19) between the first wall (5) and the second wall (6), the part being formed by an incision of the base (19).

11. Upright (1) for a frame (2) formed by an element (1) of frame (2) according to one of the preceding claims.

12. Soundproofing wall system (15), comprising: - a core formed by a frame (2) extending along a main plane (16), the frame (2) comprising a frame element (1) (2) according to one of claims 1 to 10, - a first facing plate (17) and a planar wall structure (18), the first plate (17) and the structure (18) being arranged on either side of the frame (2) and each extending in a plane parallel to the main plane (16), the first plate (17) being fixedly mounted to a first side wall (5) of the frame element (1) (2) and the structure (18) being fixedly mounted to the second side wall (6) of the frame element (1) (2).

13. Soundproofing wall system (15) according to the preceding claim, wherein the structure (18) is a second facing plate, the system (15) forming a drywall panel.

14. A method of manufacturing a frame element (1) (2), the frame element (1) (2) being defined by claim 1 and comprising a stiffening part (14), the stiffening part (14) being fixedly mounted to the profile (4) between the first wall (5) and the second wall (6), the first face (7) being formed by the profile (4) and the stop element (8) being formed by the stiffening part (14), the method comprising a step of mounting the stiffening part (14) to the profile (4), preferably by clipping, gluing and / or screwing.

15. A method of manufacturing a soundproofing wall system (15), the system (15) being defined by claim 12, the system (15) comprising a frame (2) element (1), the frame (2) element (1) being defined by claim 1 and comprising a stiffening part (14), the stiffening part (14) being fixedly mounted to the profile (4) between the first wall (5) and the second wall (6), the first face (7) being formed by the profile (4) and the stop element (8) being formed by the stiffening part (14), the method comprising a step of screwing, by the same screw, both the stiffening part (14) to the profile (4) and both the first facing plate (17) or the structure (18) to the profile (4).

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