FR3068998A1 - SIMPLIFIED AIR SEALING SYSTEM FOR A DOUBLE WALL OF AN INSULATION. - Google Patents

Abstract

The invention relates to a system 1 for maintaining a gap E2 between a wall and a facing 2 and for laying an insulator 4 and an airtight sealing sheet 40 between this wall and this facing 2, comprising: - a rod 7 designed to be wall mounted; a sleeve 8 having a cylindrical portion and a passage 24 shaped to form an airtightness around the rod; an anchor 9 provided for fixing the facing to a head 14 of the rod; and, a seal 30 to form the airtightness around the cylindrical portion.

Description

The present invention relates to the field of thermal and / or sound insulation of buildings. It relates particularly to a device and a system for fixing a thermal and / or sound insulating building material to the interior face of a partition or a wall, this fixing implementing rigid supports on both sides. other insulating material. The invention relates in particular to a device and a system for guaranteeing air tightness.

One of the means for thermally insulating a house, or improving its sound insulation, consists in placing on the internal faces of the walls or walls a sparse material such as rock wool or glass wool. These insulating materials are supplied in rolls or in sheets of very different thicknesses as required. This insulating material is then coated with an interior facing. To support the facing and insulation, it is necessary to use supports, generally metallic, called furs. A first series of these supports is first fixed, generally horizontally, on the wall. A second series of supports, generally arranged vertically, makes it possible to fix the facing there, so that the insulating material is between the wall and the facing. An airtightness membrane, generally placed against the insulation and parallel to the wall, makes it possible to complete the thermal insulation.

-2Structure systems are used to fix the support series to each other and ensure a desired spacing between the two support series. Preferably, these spacers, which pass through the insulating material, must be able to be put in place as simply as possible on the supports and easily adapt to the greatest possible range of thicknesses of insulating material to limit the number of pieces in function. of the thickness of the material used. They must therefore allow the adjustment of the spacing of the two furs. In particular when the wall has flatness, verticality or alignment defects, it must be possible to make an additional adjustment of the spacing after the installation of the insulation, when fixing the second series of supports.

Document FR 2 970 493 (Fixing device for an insulating building covering) describes such a spacer. However, this attachment connects one to the other two supports, each disposed on a respective side of the insulation; however, if we want to double the insulation with an air-tight membrane, the air-tight membrane is necessarily crossed by the fixing. Air tightness is affected.

The object of the invention is to provide a system and a method for fixing a facing to an insulator which guarantees continuity of airtightness. It must also allow additional adjustment when installing the second series of supports.

To achieve its object, the invention proposes a bracing system to maintain a spacing along a bracing axis between a wall and a facing in order to lay an insulator and an air-tightness sheet between this wall and this facing, comprising:

- a spacer rod intended to be fixed, at least indirectly to the wall;

- A sleeve, provided with an externally substantially smooth and cylindrical portion around the bracing axis, the sleeve comprising an inner passage shaped to come to form an air tightness around the rod;

- An anchor intended to be fixed to a distal end of the rod; and,

- a seal;

the facing being provided to be fixed, at least indirectly to the anchor; and, the joint comprising:

- a hole intended to come elastically to form an air tightness around the cylindrical portion; and,

- around the hole on a rear face, an area, preferably pre-glued, intended to stick to the sealing sheet.

We call proximal what is close to the wall, and distal what is far from it.

The seal may include on its rear face, around the hole and between the hole and the pre-glued area, a dry area.

The sleeve may include a flange which extends radially around the bracing axis from a proximal end of the cylindrical portion.

The sleeve may further comprise a first part made of a first substantially rigid material which forms in particular the cylindrical portion and a second part made of a second material which is elastically deformable around the rod which internally lines the first part and forms the passage. It can also be made of a single material, elastically deformable around the rod.

Advantageously, the elastically deformable material is an elastomer, of

Preferably an elastomer whose shore A hardness is less than 85, preferably greater than 60 and even more preferably close to 70.

To reduce contact between the seal and the sleeve, in particular with the collar, the latter advantageously comprises a distal face having an adapted shape. This face is preferably chosen from a concave face, a face provided with studs, and a wavy face, or a combination of these forms, without this being limiting.

The system may include a tube forming an assembly with the rod, so that the length of said assembly is adjustable. Advantageously, the tube and the rod each comprise a rack, the racks being arranged so that the tube can assume, in rotation about the bracing axis, a first position in which the racks are in longitudinal engagement, one with the other and a position in which the rod can freely slide axially in the tube.

According to a second object, the invention provides a sleeve intended to be used in a bracing system according to the invention, characterized in that it comprises an externally substantially smooth and cylindrical portion around the bracing axis, the sleeve further comprising an inner passage shaped to come to form an air tightness around a rod of the bracing system.

According to a third object, the invention provides a seal intended for use in a bracing system according to the invention comprising an elastically deformable circular hole, and, on a rear face, around this hole, a pre-glued area. Preferably, such a seal comprises, between the hole and the pre-glued area, a dry area.

-5 Several embodiments of the invention will be described below, by way of non-limiting examples, with reference to the accompanying drawings in which:

- Figure 1 is a horizontal schematic section illustrating an embodiment for airtightness according to the invention, using a sleeve in a first embodiment;

- Figure 2 illustrates parts constituting a system according to the invention for achieving the air tightness of Figure 1;

- Figure 3 is an enlarged view of detail III of Figure 1;

îo - Figure 4 is a view in direction IV of Figure 3;

- Figure 5 is a perspective view of a seal for sealing according to the invention;

- Figure 6 is a perspective view in longitudinal section illustrating a second embodiment for the sleeve;

- Figure 7 is a longitudinal sectional view illustrating a third embodiment for the sleeve; and,

- Figure 8 is a view similar to that of Figure 7, illustrating a fourth embodiment for the sleeve.

Figure 1 illustrates the use of a bracing system 1 according to the invention. In the following description, this bracing system is called spacer 1, for the sake of simplification. This spacer 1 extends along a spacer axis Xl. It is arranged horizontally in order to maintain a spacing E2 chosen between a facing 2 and a load-bearing wall; the load-bearing wall is not shown in the figures. The facing 2 is fixed on furs arranged vertically; in the figure, a fur 3 is illustrated in cross section. The spacer 1 is designed to snap into the fur 3. It allows the installation of a thermal and / or phonic insulator 4 between the load-bearing wall and the facing 2.

-6The thermal insulation 4 is placed against the load-bearing wall and kept away from the facing 2. The insulation 4 is crossed horizontally by the spacer 1. In FIG. 1, part of the spacer 1 and the insulation 4 located load-bearing wall side (to the right of the figure) is not shown.

In the embodiment illustrated in Figure 1, the insulation 4 comprises, facing the facing 2, a vapor barrier film 42 which does not provide airtightness. The vapor barrier forms a distal side of the insulation. An airtightness sheet 40 is placed in front of the vapor barrier 42.

As is particularly detailed in Figure 2, in the example illustrated the spacer includes:

- a notched tube 6, that is to say provided with notches;

- a notched rod 7;

- a sleeve 8; and,

- an anchor 9.

The tube comprises a base 11. The base 11 constitutes a proximal end of the tube, that is to say an end close to the bearing wall. The base 11 is intended to snap onto a fur fixed to the load-bearing wall; this fur is not shown in the figures. A tubular portion 12 extends axially from the base 11; the tubular portion 12 is open at a distal end opposite the base 11.

The rod 7 comprises, at a distal end, a head 14 intended to engage with female engagement means 18 of the anchor 9.

The rod 7 further comprises a proximal end 13 intended to be introduced into the tubular portion 12. A body 70, provided with notches 77, extends between the proximal end 13 and the distal end 14. The notches of the

-7tube and the notches 77 of the rod are axially distributed in a regular pitch

P77; they are arranged so that the notched rod 7 can take:

- a first position in which it can freely move longitudinally in the tube; and,

- Another position in which the notches 77 of the rod are engaged with those of the tube, so that their relative positions are longitudinally fixed.

We pass from the first position to the second by rotating the rod 7 around the axis XI, relative to the tube 6. Thus, the rod 7 and the tube 6 allow, together, an adjustment in length of the spacer 1, therefore an adjustment of the spacing E2 between the facing 2 and the bearing wall.

The sleeve 8 is intended to be mounted in leaktight manner around the notched body 70. The sleeve is intended to be threaded axially, by sliding on the notched rod 7, from the distal end 14, as far as the notched body 70, according to the direction F7.

The reciprocal engagement of the anchor 9 on the head 14 of the notched rod 7 is such that the anchor 9 and the rod 7 are immobilized with respect to each other, both longitudinally and in rotation around the axis XI, so that a rotation of the anchor 9 around the axis XI causes the same rotation of the notched rod 7.

In the example illustrated, the anchor 9 comprises handles 19 provided for rotating the anchor around the axis XI. Thus, a rotation of the anchor causing a rotation of the extension which causes a rotation of the rod, it suffices to rotate the anchor using the handles to move the rod from its second position to the first, to adjust the spacing E2 of the facing 2, then to the second to fix this spacing.

The reciprocal engagement of the sleeve 8 on the notched rod 7 is such that they are immobilized with respect to each other, both longitudinally and in rotation around the axis XI, so that a rotation of the notched rod 7 around the axis

XI causes the same rotation of the sleeve 8.

The sleeve 8 will now be described in more detail, in particular with reference to the section of FIG. 3 and to the axial view of FIG. 4.

The sleeve 8 is substantially of revolution around an extension axis X8 designed to merge with the spacer axis XI under the conditions of use illustrated in FIG. 1. In the example illustrated, the sleeve 8 comprises a ring 21 and a sheath 22.

The ring 21 is substantially cylindrical, in a rigid material, for example of the same plastic material as the notched rod and tube 6, 7. The ring is provided with a flange 23 which extends radially at a proximal end d 'a cylindrical portion 25. This cylindrical portion 25, substantially smooth, forms an outer diameter D8 of the sleeve 8. The cylindrical portion 25 has an axial length L25, measured on an outer surface of the ring, equal to or greater than a distance provided for adjusting the spacing E24, when fitting the fur 3.

The sheath 22 lines the ring 21 over an axial length L20 less than the axial length L21.

In the example illustrated, it is provided with a collar 26 which extends radially at a proximal end thereof; this flange is in contact with a proximal face of the flange 23 of the ring 21.

-9The sheath forms an axial passage 24 of complex cross section S24, substantially constant, conforming to the cross section S77 of the notched body 70 at the top of a notch ΊΊ. The section S24 of the passage 24 is advantageously proportionally smaller than the corresponding section S77 of the notched body 70, so that the sheath forms a seal around the notched body 70, at the location of at least one notch 77. Preferably , the axial length L22 of the sheath 22, including the collar 26, is greater than the pitch P77 of the notches ΊΊ, in order to ensure that the sheath is not between two notches. In the example illustrated, the length L22 of the sheath 22 is greater than twice the pitch P77. Although this is not illustrated in the figures, the passage is advantageously chamfered, at least at its proximal end.

The sheath is made of a sufficiently flexible material, preferably of the elastomer type, to be able to be threaded axially and elastically form the seal around the notched body. In the example illustrated, the hardness of the sheath, measured on the Shore A scale, is 70.

The sleeve 8 can be produced by bi-material injection. It can also be by gluing the sheath inside the ring, each having been manufactured individually.

In order to ensure the desired air tightness, a fastening system according to the invention further comprises a seal 30, particularly illustrated in FIG. 5. In the example illustrated, the seal 30 is a flexible seal, in an elastomeric material, of substantially constant thickness E30, which can be between 0.5 and 1 millimeter; it has a substantially square shape, in its dimensions L30xL30 perpendicular to its thickness.

The seal 30 is pierced at its center, depending on its thickness, with a through hole 31. The diameter D31 of the hole 31, at rest, that is to say when the seal is not elastically stressed, is less the outside diameter D8 of the cylindrical portion 25 of the sleeve 8. The diameter D31 is also large enough for the sleeve 8 to be introduced therein by elastically deforming the seal 30.

In addition to sealing, the particular shape of the section S24 of the passage 24 ensures good rotation of the sleeve 8 on the notched rod 7. Thus, when the spacing E24 is adjusted, the sleeve is rotated by the rod 7. The joint ensures with the cylindrical portion 25 the function of a rotary joint, the joint 30 being fixed and the cylindrical portion being mobile. Thus, the spacing E24 can be adjusted by a length substantially equal to the axial length L25 of the cylindrical portion 25 of the sleeve 8.

The seal 30 comprises, on a rear face visible in FIG. 5, a circular limit 32, concentric with the hole 31. This limit 32 is formed between a pre-glued area 33 and a dry area 34, that is to say without glue . The pre-glued zone is formed between the limit 32 and a peripheral edge 35 of the joint 30. The dry zone 34 is formed between the limit 32 and the hole 31. The limit has a gluing diameter D32 larger than the diameter D 21 of the collar 21. A peel 36 is provided on the seal 30 to protect the pre-glued area before the seal is put in place. The peel 36 is provided so as not to cover the dry area, which facilitates the removal of this peel. The seal 30 has a dry front face 38.

For economic reasons, unlike that described in Figure 5, a joint can be pre-glued over its entire rear face, that is to say, it does not include a dry area. Indeed, taking into account the method of fitting the seal and the shape of the sleeve, the contact of the rear face of the seal with the sleeve

- 11 and its possible flange is weak or nonexistent. Furthermore, in particular due to the complex cross section of the rod, the rotation of the sleeve on the rod is strong. Thus, the rotation of the rod during the adjustment of the spacing is not notably prevented.

However, to reduce the torque exerted by the flange 23 of the sleeve 8 on the seal 30 and to avoid excessive deformation of the seal under the effect of this torque, the flange may have a shape and / or a texture which reduces the surface of contact between the seal and the flange. Figures 6 to 8 describe such embodiments of the sleeve.

FIG. 6 illustrates a second embodiment of the sleeve 8. In this embodiment the flange 23 of the ring is concave towards the distal end of the ring; thus, it has on the side that can serve as a support for a glued face of the joint, only a sharp annular edge. Such an edge is not very conducive to bonding the joint; rotation of the seal is facilitated by such an arrangement. In this embodiment, the sleeve 22 does not include a flange and covers the entire interior of the ring axially 21. At each end of the passage 24, the sharp edges of the section S24 are broken by chamfers 39. These chamfers are more progressive at the distal end than at the proximal end.

These Figures 7 and 8 illustrate only the ring 21, which will be described in that it differs from that of the first embodiment and the second embodiment described above.

FIG. 7 illustrates a third embodiment of the ring 21, and in particular of the collar 23. In this embodiment of the pads 51 substantially hemispherical are distributed on the distal face 52 of the collar

- 1223. Thus, the seal can hardly be stuck on the face 52, between the studs.

FIG. 8 illustrates a fourth embodiment of the ring 21, and in particular of the collar 23. In this embodiment the collar 23 has radial undulations. Thus, the joint can hardly be stuck on the collar, in the hollows of the corrugations.

When performing a doubling as illustrated in Figure 1, the following 10 steps are carried out:

- fixing of a first coat, not shown, on the load-bearing wall; then,

- Attachment of the tube 6 to this fur, the rod 7 having preferably been previously introduced into the tube 6; then,

- laying of the insulation 4 against the load-bearing wall, so that it is crossed by the rod 7 and the tube 6,

- adjusting the length of the spacer 1, so that the rod head 14 is visible in front of the insulation 4; then,

- installation of the airtightness sheet 40, if the insulation is not already fitted; and,

- Laying the sleeve on the rod 7, so that the cylindrical portion 25 is transversely substantially at the location of the distal face 43 of the insulator 4; then,

- Installation of the seal 30 around the cylindrical part 25 of the sleeve 8; and,

- Removal of the peel 36, so that the glued area 33 comes to stick on the sealing sheet 40; then,

- fixing of the anchor 9 on the head 14; and,

- adjustment of the length of the spacer 1 in order to ensure the desired spacing E2; then,

- laying of the second fur 3 and facing 2.

- 13 In the example illustrated, the sleeve 8 was placed after the sealing sheet

40; the opposite is possible.

Of course, the invention is not limited to the preferred embodiments which have just been described but, on the contrary, the invention is defined by the claims which follow.

It will appear to those skilled in the art that various modifications can be made to the embodiments described above, in the light of the teaching which has just been disclosed to him.

Thus, instead of the sheath extending only over part of the axial length of the ring, it can extend over its entire length, so that it completely covers the interior of the ring.

Also, the sleeve, instead of being in two pieces, that is to say a ring and a sheath, it can be made in one piece, in a single elastomeric material.

The sleeve may also have no collar. The main role of the flange is to ensure a better grip for the person who places the extension on the rod head; it makes it possible to bear with the hand on the flange and to more easily exert an axial force in order to press it in force on the notched rod. The flange also serves as a stop when installing the seal.

If the sleeve has a collar, this can have an outside diameter proportionally larger than that illustrated in the figures.

- 14 The hardness of the elastomer, measured according to the Shore A scale, is advantageously less than 85.

The joint can also be circular instead of being square. The square shape is preferred, since it makes it possible to have less fall when cutting the joint during its manufacture, which also makes it possible, by having a larger glued area, to guarantee better adhesion of the joint to the sheet of paper. air tightness.

The joint can also be entirely pre-glued, that is to say it does not include a dry area. Indeed, taking into account the method of fitting the seal and the shape of the sleeve, the contact of the rear face of the seal with the sleeve and its possible flange is weak or non-existent. Furthermore, in particular due to the complex cross section of the rod, the rotation of the sleeve on the rod is strong. Thus, rotation of the rod when adjusting the spacing is not significantly prevented.

If the joint is pre-glued over its entire surface, provision may also be made for the peel to be precut, so that a central part remains on the joint, between the joint and the flange, when an additional part is removed to allow the bonding of the seal on the airtightness sheet.

Claims (12)

claims 1. Bracing system (1, 8, 30) for maintaining a spacing (E2) along a bracing axis (Xl) between a wall and a facing (2) in order to lay an insulator (4) and a sheet of air tightness (40) between said wall and said facing (2), characterized in that it comprises: - a spacer rod (7) intended to be fixed, at least indirectly to the wall; - A sleeve (8) provided with a portion (25) which is externally substantially smooth and cylindrical around the bracing axis (Xl), said sleeve comprising an internal passage (24) shaped to come to form an air tightness around said rod; - An anchor (9) intended to be fixed to a distal end (14) of said rod; and, - a seal (30); said facing being designed to be fixed, at least indirectly to said anchor; and, said seal (30) comprising: - A hole (31) provided to come elastically to form an air tightness around said cylindrical portion (25); and, - Around the hole on a rear face, an area (33), preferably pre-glued, intended to be stuck on said sealing sheet (40). 2. System according to claim 1, characterized in that the seal comprises on its rear face, around the hole (31) and between said hole (31) and the pre-glued area (33), a dry area (34). 3. System according to claim 2, characterized in that the sleeve (8) comprises a flange (23) which extends radially around the bracing axis (XI) from a proximal end of the cylindrical portion (25) . 4. System according to claim 3, characterized in that the flange (23) comprises a distal face (52) having a shape adapted to have reduced contact with the seal (30), said face preferably being chosen from a concave face , a face provided with studs (51), and a corrugated face. 5. System according to one of claims 1 to 4, characterized in that the sleeve comprises a first part made of a first substantially rigid material (21) which in particular forms the cylindrical portion (25) 15 and a second part in a second material (22) elastically deformable around the rod (7) which lines the inside of the first part and forms the passage (24). 6. System according to one of claims 1 to 5, characterized in that the 20 sleeve is made of a single material, elastically deformable around the rod (7). 7. System according to one of claims 5 and 6, characterized in that the elastically deformable material is an elastomer, preferably a 25 elastomer whose shore A hardness is less than 85, preferably greater than 60 and even more preferably close to 70. 8. System according to one of claims 1 to 7, characterized in that it comprises a tube (6) forming an assembly with the rod (7), so that the length of said assembly is adjustable. 9. System according to claim 8, characterized in that the tube (6) and the rod (7) each comprise a rack, said racks being arranged so that the tube can rotate in rotation around the bracing axis. , a first position in which the racks are in longitudinal engagement with each other and a position in which said rod can freely slide axially in said tube. 10. Sleeve (8) intended to be used in a bracing system (1, 8, 30) according to one of claims 1 to 9, characterized in that it comprises a portion (25) externally substantially smooth and cylindrical around the bracing axis (XI), said sleeve comprising an inner passage (24) shaped to come to form an air tightness around a rod of said bracing system. 11. Joint (30) intended to be used in a bracing system (1, 8, 30) according to one of claims 1 to 9, characterized in that it comprises: - an elastically deformable circular hole (31); and, - On a rear face, around the hole (31), a pre-glued area (33). 12. Joint according to claim 10, characterized in that it comprises, between the hole (31) and the pre-glued area (33), a dry area (34).