FR3046617A1 - MEMBRANE SEALING SYSTEM - Google Patents

Abstract

The invention relates to a sealing system (100) adapted to seal at the periphery of the skewer opening of a membrane (4) skewered on a rod section (10) extending in one direction. axial (X) and provided at its periphery with a plurality of primary ribs (12). The sealing system comprises at least a first jaw (120) adapted to be engaged on said rod section (11) by an engagement opening, the edge of the engagement opening being adapted to conform to the shape of said section rod, and means for locking said jaw in contact with said membrane.

Description

TECHNICAL AREA

This paper discusses wall insulation, including the isolation of perimeter walls from inside a building.

The present disclosure relates in particular to the doubling of a wall of a building, and more specifically the installation in this context of a membrane, in particular of the air-tight membrane type and possibly of the steam management of water.

BACKGROUND OF THE INVENTION

In recent years, any new building or any new part of an existing building must meet requirements of low energy consumption.

Good thermal insulation and good airtightness and water vapor are all parameters to meet these requirements. The airtightness of a building characterizes its sensitivity vis-à-vis the infiltration or leakage of air passing through the envelope of the building. These air leaks are synonymous with heat loss and reduced efficiency of thermal insulation. Today, airtightness must be measured at the end of the worksite.

The doubling of a wall such as a wall is frequently practiced, in renovation or new construction, to obtain or improve the thermal insulation of the building. A doubling facing is attached to a lining frame which is itself attached to structural elements of the wall to be doubled, at a given distance therefrom. An insulation liner, for example comprising one or more layers of insulating material, as well as an airtight membrane, is inserted between the wall to be doubled and the lining facing.

The waterproofing membrane may optionally have a vapor barrier function. According to its permeance, it limits or then prevents the movement of water vapor through the assembly formed by the wall and against the partition wall. The membrane may also have hygroregulating properties. This is known as a "smart vapor retarder membrane" whose permeability to water vapor varies depending on the humidity of the air.

The attachment of the doubling frame to the structural elements of the wall to be doubled is achieved by means of regularly spaced bracing accessories. Each bracing accessory typically comprises a rod-shaped main body extending transversely to the wall to be doubled and facing, one end of which is provided with means for its cantilever attachment to a structural member of the wall to be doubled and whose other end carries means of its assembly with the frame of doubling. Such bracing accessory is for example known from WO2006 / 061538.

During installation, the insulation seal is plugged onto the rods of the bracing accessories, which causes multiple piercing of the layers of fibrous material and, where appropriate, of the membrane. This drilling is particularly detrimental with regard to the membranes, because their function of airtightness and possibly hygrometric management is then impaired. The piercing of the membrane may further constitute a tear initiation likely to propagate if a tension is exerted on the membrane.

To partially avoid this problem, it is known to arrange the membrane on the inner side of the backing frame, between the latter and the lining face. The membrane is not traversed by the bracing accessory and can remain intact, at least initially.

This solution is however only partial. The attachment of the cladding to the backing frame involves the piercing of the membrane by the fastening elements (staples, screws, nails, etc.), which, although to a lesser extent, impairs the sealing of the membrane. .

The positioning of the membrane in front of the doubling frame raises another technical problem: it leaves no interstitial space between the membrane and the facing. However, it is often necessary to insert, behind the cladding facing, various cables or pipes including water network, ventilation, electricity or communication. It is therefore difficult to envisage placing the cables and wiring accessories between the membrane and the cladding. The cables could indeed be properly fixed only through openings in the membrane. The diaphragm could also be damaged or distended by cables or fittings for cladding, fixing or connection.

These cables can certainly be arranged behind the membrane. But it is no longer possible to access it for the maintenance or the evolution of the wiring installation without removing the membrane or opening it. In addition, cabling operations may, for reasons of logistics or changes in needs or technologies, occur after the doubling of the wall, which also requires the removal or opening of the membrane by stakeholders who do not are usually not specialized in wall lining and insulation.

OBJECT AND SUMMARY OF THE INVENTION One of the objectives of the present invention is to provide a system for overcoming the aforementioned drawbacks.

In particular, an object of the present invention is to provide a system to ensure a good airtightness of a building, while maintaining a technical space, accessible without drilling the membrane once installed.

This objective is achieved with a sealing system adapted to seal at the periphery of the skewed opening of a skewed membrane on a rod portion extending in an axial direction and provided at its periphery with a plurality of primary ribs, said sealing system comprising at least a first jaw adapted to be engaged on said rod section by an engagement opening, the edge of the engagement opening being adapted to conform to the shape of said section rod, and means for locking said jaw in contact with said membrane.

The system according to the invention makes it possible to restore the leaktightness of the membrane, lost because of its skewering on the stem, thanks to a cooperation between the first jaw and the stem on the one hand, and between the jaw and the membrane. 'somewhere else. The sealing is therefore performed at two levels: the edge of the engagement opening of the first jaw is adapted to cooperate closely with the rod section on which it is engaged to seal with the rod, in other words to prevent air to pass and / or limit the passage of air through said engagement opening, between the first jaw and the rod, and an area of the first jaw, located around its engagement opening, is adapted to be locked in contact with a zone of the membrane located around its skewed opening.

Since the edge of the engagement aperture of the first jaw is adapted to conform to the shape of the ribbed rod section, the first jaw can be mounted in a sealed manner indifferently over the entire length of the rod section.

Consequently, it is for example possible to seal around the skewer opening of a membrane disposed between two layers of insulation.

It is also possible to mount two sealing systems according to the invention on one or more ribbed sections of the same rod, particularly in the case of a lining comprising a plurality of membranes spaced apart for example by an insulating layer.

The system according to the invention also allows to maintain a technical space between the membrane and the facing, for the passage of cables, ventilation ducts, plumbing. This technical space is accessible without piercing the membrane once installed. Its dimensions can be adapted according to the needs.

In one example, the engagement opening of the first jaw has a profile similar to that of the stem section.

By a profile similar to the profile of the rod section, here means a profile identical to the profile of the rod section (of the same shape and dimensions) or a homothety of said profile (of the same shape but of different dimensions).

The profile of the stem section is defined as the profile of at least a portion of said portion considered in view in its axial direction, comprising at least one primary rib formed at its periphery.

The profile of the engagement opening is the profile of said opening, seen in a direction corresponding to the axial direction of the rod once the jaw mounted on the rod. Note, however, that the profile of the opening here means its original shape, resulting directly from the manufacturing process of the jaw, and not its shape after mounting on the rod. Generally, the axial direction of the rod corresponds to its axis of symmetry.

In one example, the edge of the engagement aperture of the first jaw may be deformable to conform to the profile of the stem portion. In one example, the engagement opening may be undersized with respect to the profile of the rod, so that the opening widens cooperating with the rod during its engagement therewith. In another example, the engagement opening may instead be oversized relative to the profile of the rod. In this case, the first jaw is deformable and means can be implemented to deform said jaw and return the edges of its engagement opening in contact with the rod, once the jaw is engaged on the rod, in the manner of a cable gland.

In this case, it may be advantageous for the profile of the engagement opening to correspond to the profile of the rod section (for example, a homothety of the profile of the rod section).

The primary ribs formed at the periphery of the rod section may be distinct from each other, and parallel to each other.

They may be perpendicular to the axial direction of the rod section, or form with said direction an angle other than 90 °.

The primary ribs may in particular form a thread.

According to one arrangement, the primary ribs of the stem section are truncated on at least a truncated primary angular portion of the rod. In this case, the edge of the engagement opening of the first jaw may be adapted to fit the edge of said truncated primary ribs, to seal with the rod.

In the remainder of the present description, the zone of said jaw, located around its engagement opening, intended to come into contact with a zone of the membrane located around its skewed opening, is called the contact zone of the first jaw. . According to one arrangement, this contact zone is continuous and closed on itself. For example, it forms a circle or an oval.

According to a particular arrangement, the first jaw may also comprise several contact zones, preferably all continuous and closed on themselves, and generally concentric, to achieve several successive levels of sealing.

The means for locking the first jaw in contact with the membrane may be of different natures.

They may for example include adhesive means.

In this case, the first jaw is adapted to stick on the membrane. For example, the contact zone of the first jaw with the membrane comprises at least one pre-bonded portion, optionally protected by a removable film. In this case, the seal can possibly be provided by the first single jaw.

According to a particular arrangement, the sealing system may also comprise a second jaw adapted to be engaged on the rod section.

The second jaw is obviously intended to be mounted on the rod on the side of the membrane which is opposite to the first jaw. The membrane is thus disposed between the two jaws.

The locking means may comprise means for locking the two jaws with respect to one another in a locking position in which the membrane is clamped between said jaws around its skewed opening.

The locking means may in particular comprise clipping means.

Alternatively, the locking means may comprise means for screwing one of the first and second jaws on the other jaw.

The locking means may also comprise locking means in translation of the jaws on the rod, in the axial direction.

According to an example, the second jaw is adapted to be engaged on the rod section by a mounting opening and said jaw has at least one secondary rib projecting inwardly from the mounting opening, the secondary rib being adapted to cooperating with primary ribs formed at the periphery of the rod section for locking in translation of said second jaw on the rod section.

In one example, the at least one secondary rib of the second jaw is truncated on at least one angular portion.

The first jaw may also have means for cooperating with the primary ribs of the rod section for locking in translation of said jaw with respect to the rod section, in the axial direction.

These means comprise for example at least one tongue protruding inwardly of the engagement opening, and adapted to deform elastically. During the engagement of the first jaw on the rod, the tongue deforms cooperating with the peripheral edges of the primary ribs. Then it returns elastically in its initial position, projecting from the periphery of the engagement opening towards the inside of said opening. In this position, it cooperates with at least one primary rib to block the translation of the first jaw on the rod, in the axial direction. Preferably, in this position, it is immobilized axially between two adjacent primary ribs of the rod section.

In one example, the jaws are configured to pinch the membrane axially around its skew opening in the locking position.

As an alternative or in addition, the first and second jaws may comprise means adapted to cooperate to pinch the membrane radially around its skewed opening.

A pinching zone of the membrane between the first and second jaws is preferably a continuous zone and closed on itself.

According to a particular embodiment of the invention, the first and second jaws are configured to clamp the membrane on a first continuous zone and closed on itself, and on a second continuous and closed zone on itself, surrounding the first zone , in locked position.

In one example, the second jaw has a stiffness greater than that of the first jaw. The first jaw is for example made of thermoplastic elastomer, while the second jaw is for example polyolefin (for example polypropylene or polyethylene), filled or not with glass fibers or talc.

According to one example, the first jaw, which is more flexible, can then be adapted to deform elastically against the second jaw, in the locked position, the elastic return of the first jaw against the membrane sealing around the skewed opening .

The present disclosure also relates to a lining assembly of a wall comprising: - a sealing system as defined above, and - a spacer element comprising a rod having a free end of skew and at least one ribbed section provided with at its periphery a plurality of primary ribs, and fastening means to the wall to be doubled.

According to one example, the doubling unit further comprises a holding element of a doubling structure, adapted to be mounted on the spacer element.

In one example, the primary ribs of the stem section are truncated on at least a truncated primary angular portion of the rod.

According to one example, the sealing system comprises a second jaw adapted to be engaged on the rod section, the second jaw has at least one secondary rib adapted to cooperate with primary ribs formed at the periphery of the rod section for locking in translation of said second jaw on the rod section and the at least one secondary rib of the second jaw is truncated on at least a truncated secondary angular portion corresponding to the untruncated portion of the rod so that the second jaw is free of sliding along the rod section, in the axial direction, in at least one angular position around said rod section.

The present disclosure further relates to a doubling of a wall, comprising: - bracing elements fixed to the wall to be doubled, said bracing elements each comprising a rod having a free skew end and at least one ribbed section provided at its periphery with a plurality of primary ribs, - at least one layer of thermal and / or acoustic insulation skewed on or interposed between the bracing elements, - a membrane skewered on the bracing elements, - on each bracing element, at least a first jaw engaged by an engagement opening on the ribbed shaft section of said bracing member, said first jaw being in a locked position in contact with the membrane, and the edge of the opening engagement of each first jaw conforming to the shape of said stem section, - on each spacer element, a holding element of a dubbing structure.

In the present application, for example, a layer of thermal and / or acoustic insulation comprises or consists of a succession of panels or strips of insulating material, including a fibrous material of animal origin or vegetable or mineral wool.

A layer of thermal and / or acoustic insulation may also comprise or consist of one or more Vacuum Insulating Panels (also called PIV type panels) constituted in a known manner of a membrane envelope which seals the gases and a rigid panel made of a porous material having insulating properties, placed inside this envelope and kept under vacuum by means of this envelope. The porous panel, which is most often of a material such as fumed silica, precipitated silica, airgel, perlite, glass fibers, gives the panel its shape and gives it its mechanical strength.

The doubling may further comprise a doubling structure, fixed on the holding member. A doubling structure typically comprises a doubling frame element, in particular a profile (also called "fur"), and a facing plate, for example a plasterboard.

According to an example, the lining further comprises, on each spacer element, at least a second jaw engaged on the ribbed stem section of said spacer element, the first and second jaws being locked with respect to one another. another in a locking position in which the membrane is clamped between said jaws around its skewed opening.

The present disclosure finally comprises a method of doubling a wall comprising: a) fixing on the wall of bracing elements each comprising a rod having a free end of skew and at least one ribbed section provided at its periphery with a plurality of primary ribs, b) the skew on or intercalation between the bracing elements of at least one layer of thermal and / or acoustic insulation, c) in that order or in reverse order, sutting a membrane on the bracing members, engaging a first jaw on the ribbed stem portion of each brace element, the edge of the engagement opening of said first jaw conforming to the shape said rod section, and the locking of said first jaw in contact with the membrane, f) the engagement on each spacer element of a holding member of a doubling structure, and g) the contacting of u no doubling structure with at least one holding element.

According to an example, the doubling process further comprises, in step c), the engagement of a second jaw on the ribbed stem section of each spacer element, the locking of said first jaw against the membrane comprising the locking of the two jaws relative to each other in a locking position in which the membrane is clamped between said jaws around its skewed opening.

Several modes or examples of embodiments are described in this presentation. However, unless otherwise specified, the features described in connection with any one embodiment or embodiment may be applied to another embodiment or embodiment.

BRIEF DESCRIPTION OF THE DRAWINGS The invention will be better understood and its advantages will appear better, on reading the detailed description which follows, of several embodiments shown by way of non-limiting examples. The description refers to the accompanying drawings in which:

Fig. 1 is a cross-sectional view of a wall lining using a sealing system according to a first embodiment of the present invention;

Figure 2 is a sectional view along II-II of Figure 1;

Figure 3 is a more detailed view of the sealing system of Figure 1, in the locked position on the rod of a spacer element (the membrane between the two jaws being omitted for the sake of clarity);

Figure 4 is an exploded view of Figure 3;

Figure 5 is a perspective view of the rear face of the first jaw of the sealing system of Figure 3;

FIG. 6 illustrates a sealing system according to a second embodiment of the invention, in the locked position on the rod of a spacer element (the membrane between the two jaws being omitted for the sake of clarity);

Figure 7 is a perspective view of the front face of the first jaw of the sealing system of Figure 6;

Figure 8 is a perspective view of the rear face of the second jaw of the sealing system of Figure 6;

Figures 9 and 10 illustrate the respective front and rear faces of a sealing system according to a third embodiment of the invention;

FIGS. 11 and 12 illustrate an alternative embodiment of the first embodiment of FIGS. 1 to 5. DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS FIGS. 1 and 2 illustrate an insulating inner lining 1 of a wall F of a building , in particular a peripheral wall, by means of a sealing system according to the invention.

The lining 1 typically comprises: a plurality of bracing elements 2 fixed on the wall F by their rear end, and each having a rod 10, provided with a ribbed section 11 and a free skew end 10a to their front end, at least one layer of thermal and / or acoustic insulation 3 constituted for example by a succession of panels or strips of insulating material, in particular a fibrous material of animal origin or vegetable or mineral wool, or, according to another example, a sucess of PIV type panels, hooked on or interposed between the bracing elements 10, a sealing membrane 4 (with airtight function and possibly vapor barrier, in particular hygroregulante) skewered on the bracing elements 2, at the front of the insulating layer 60, in particular a polypropylene or polyamide membrane, for example with a thickness of between 200 and 400 μm, holding elements 5 of a doubling structure 6, fixed to the front end of the bracing elements 2.

According to the invention, the lining 1 further comprises, on each bracing member 2, a sealing system (here according to a first embodiment) 100 adapted to achieve the sealing at the periphery of the opening of skew 4a of the membrane 4 skewered on the rod 10 of this spacer element 2.

For the rest of the present description, an axial direction is defined as a direction parallel to the axis X of the rod of a spacer element 2.

A radial direction is further defined as a direction orthogonal to the axial direction and passing through the X axis.

Finally, an axial plane is defined as a plane passing through the X axis, and a radial plane as a plane orthogonal to the X axis.

The terms front and rear are used hereinafter in connection with the axial direction X and the mounting direction of the doubling 1. Thus, a front portion of an element will be further from the wall to be doubled P and closer to the facing of dubbing than a back part of the same element.

The rod 10 of a spacer member 2 is for example an injection molded part, made of polyamide.

Each spacer device 2 comprises, at a first end 10b of the rod 10, said rear, means of its cantilevered attachment to the wall F. Once the spacer element 2 fixed, its rod 10 generally extends orthogonally to the wall to be doubled F.

These fixing means cantilevered to the wall comprise, for example, clipping means on a profile P previously fixed to the wall, in particular by screwing. As illustrated in FIGS. 3 and 4, the bracing member may for example comprise a clipping base 16 provided at its periphery with notches 16a (here two parallel notches) intended to receive the curved arms of a profile. P, usually in C.

These means may, as an alternative or in addition as is the case in the illustrated example, comprise at least one mounting plate 17 provided with at least one screw hole 17a for fixing the spacer element 2 to the wall F or the profile P fixed beforehand on the wall F, by means of screws.

The second end 10a of the rod 10, said front end (its end farthest from the wall to be doubled in the mounted position), is configured to allow the piercing of the sealing membrane 4 and possibly the skew of the or layers of insulation 3, and for this purpose a pointed termination.

As illustrated in Figures 3 and 4, the rod 10 has at its periphery, on at least one section 11, a plurality of ribs 12 said primary ribs, here regularly spaced from each other, parallel to each other, and orthogonal to the direction axial X.

In the particular example shown, the rod 10 (with its ribs) is truncated on two truncated primary angular portions 13a, 13b, here diametrically opposed, each truncated primary angular portion 13a, 13b extending over an angle strictly greater than 90 ° , for example but not limited to between 120 and 150 degrees. Between these truncated primary portions are defined untruncated primary portions 14a, 14b of the rod.

Each rib thus comprises two rib portions located respectively at a non-truncated primary portion 14a, 14b, diametrically opposed and symmetrical with respect to an axial plane of the spacer element.

Each of these rib portions 12a, 12b is in the form of a ring sector comprising, in radial section, a curved main edge 15a, and two lateral edges 15b, 15c forming between them an angle strictly less than 90 ° , for example but not limited to between 30 and 60 degrees.

At least one stiffening rib may optionally be provided at the level of the truncated primary angular portions 13a, 13b of the rod 10. As illustrated in FIG. 3, the rod 10 comprises, for example, an axial stiffening rib 18 at the right of each angular portion. truncated primary 13a, 13b, and a plurality of radial ribs 19 preferably evenly spaced in the axial direction X, connecting the primary rib portions 12a, 12b.

As illustrated in Figure 2, each holding element of a doubling structure 5 is adapted to be mounted on the rod 10 at its front end 10a. A doubling structure holding member 5 is advantageously (but not exclusively) of the type described in the patent application WO2006 / 061538. In this case, it comprises a cavity 5a through which it is adapted to be mounted on the rod, said cavity being threaded to cooperate with the primary ribs 12 of the rod portion 11, for its locking in translation in the axial direction X. Typically , the lining structure holding member 5 comprises clipping means 5b to a profile of the lining frame, in particular in the form of notches adapted to receive the curved arms of the profile. For more details, reference will be made to the text of the aforementioned application.

The doubling structure 6 typically comprises profiles 6a adapted to be clipped onto the holding elements 5, and facing plates 7 adapted to be screwed onto said profiles 6a.

The sealing system 100 of FIGS. 1 and 2 will now be described in more detail with reference to FIGS. 3 to 5.

As indicated above, the sealing system 100 is adapted to seal at the periphery of the skewer opening 4a of the membrane 4 connected to the rod 10.

In the example, it comprises a first jaw 120, having an engagement opening 121 whose edge 122 is adapted to match the profile of the ribbed rod section 11 and thus make a seal with the rod 10, a second jaw 130, and means for locking the first jaw 120 in contact with the membrane 4.

As illustrated in FIGS. 1 to 3 in particular, the second jaw 130 is intended to be mounted on the rod 10 before skew of the membrane 4, while the first jaw 120 is intended to be mounted on the rod 10 after skewering of the membrane 4. In mounted position, the second jaw 130 is placed at the rear of the membrane 4, and the first jaw 120, at the front.

Both jaws here are adapted to be locked both on the rod in a relative locking position in which the membrane 4 is clamped between said jaws 120, 220 around its skew opening 4a.

In the particular example shown, the jaws are configured to clamp the membrane in the axial direction at a first contact zone, and in the radial direction, at two other concentric contact zones.

The first and second jaws are described in more detail below.

In the example, the second jaw 130 is in the form of a relatively rigid plate, for example made of polypropylene (reinforced or not with glass fibers). The plate 130 has a central mounting opening 131, of generally circular section, for mounting on the rod 10 (by the free end 10a thereof).

As will be described in the following, the plate 130 is adapted to be mounted and locked on the rod in a bayonet type system or "quarter turn".

As illustrated in FIG. 4, an annular rib 132, hereinafter secondary rib, projects inwardly from the central mounting opening 131.

In the example, the secondary rib 132 is truncated on two angular sectors 133a, 133b of angle greater than the angle of the untruncated primary portions 13a, 13b of the rod, and opposite diametrically.

The plate 130 is thus free to slide along the rod portion 11, in the axial direction X, when its secondary rib portions 132a, 132b are opposite the truncated portions 13a, 13b of the rod and that its truncated portions 133a , 133b are facing non-truncated portions of the rod 14a, 14b, carrying the rib portions 12a, 12b (unlocked position of the plate). On the other hand, the plate 130 is locked in translation in the axial direction X along the rod 10 when its secondary rib portions 132a, 132b lie opposite the non-truncated portions of the rod 14a, 14b, and that its portions truncated 133a, 133b are opposite the truncated portions 13a, 13b of the rod (locked position of the plate).

According to an advantageous arrangement of the invention, at least one of the secondary rib portions 132a, 132b is provided with an end stop 134 configured to block the rotation of the plate 130 with respect to the rod 10 in a direction of rotation R about the X axis, cooperating with a side edge 15b or 15c of a primary rib 12 or two parallel adjacent primary ribs, in a locked position.

The plate 130 is thus mounted on the rod 10 by performing a translational-rotational movement typical of bayonet systems. It is first translated along the rod 10, in the axial direction X, in the unlocked position, then rotated about the axis of the rod, in the direction R, its secondary ribs then sliding between two primary ribs of the section rod until the stop 134 comes into contact with the lateral edge of at least one of these primary ribs 12. The pivoting is generally a quarter turn. Gripping notches 138 may advantageously be provided on the periphery of the plate 130 so as to facilitate its rotation by the user.

In the example, the first jaw 120 is a flexible pellet, for example made of thermoplastic elastomer (for example SEBS). It presents here a circular section, of diameter Dl.

In the example illustrated in FIGS. 4 and 5, the pellet 120 is curved, with its concave front face 120a and its convex rear face 120b.

As illustrated in FIG. 4, the pellet 120 is provided with a central orifice forming an engagement opening 121 whose edge 122 has a profile identical to that of the section of ribbed rod 11.

Because of its flexibility, the pellet 120 can easily be engaged on the rod 10 and moved along it, in the axial direction X.

Once the pellet 120 mounted on the rod 10 (see Figure 3), the edge of the engagement opening 122 exactly follows the edges of the ribs 12 it surrounds, as well as the edge of any stiffening grooves 18 of the rod, blocking the passage of air between the pellet 120 and the rod 10.

The axial clamping of the membrane between the two jaws is achieved when the pellet is placed in an axial position sufficiently close to the plate 130 (locked position of the system). It then comes to deform elastically against a portion, preferably flat, of the front face 130a of the plate 130, the plate 130 and the chip 120 thus taking the membrane 4 in the axial direction X. Due to its elastic deformation, the pellet 120 is then locked in contact with the membrane 4 on a first contact zone.

To ensure its locking on the rod 10 in the axial direction X, the pellet 120 is provided with two tabs 123 projecting inwardly of the engagement opening 121, and adapted to deform elastically. During the engagement of the first jaw 120 on the rod 10, each tab 123 deforms by cooperating with the peripheral edges 15a of the primary ribs 12. Once the pellet 120 is stopped in position, each tab 123 elastically returns to its initial state projecting inwardly of said engagement opening 121 from the periphery thereof. In this position, it is immobilized axially between two adjacent primary ribs 12 of the rod portion 11 to block the translation of the chip 120 on the rod 10, in the axial direction X.

In the example illustrated, the plate 130 and the pellet 120 are further adapted to pinch the membrane radially in the locked position.

As illustrated in FIG. 5, for this purpose, the pellet 120 has, on its rear face, a protruding portion 124 having a radially outer axially extending nip 124a, said surface 124a being annular, continuous, and closed on itself around the engagement opening 121.

As illustrated in Figure 4, the plate 130 is further provided with two annular ribs on its front face.

A first rib 135, located near the mounting opening, delimits, with its radially inner face 135a, a cylindrical cavity, preferably flared towards the front.

Once the system in the locked position, the projecting portion 124 of the pellet 120 is engaged in the cavity 135 of the plate 130, the membrane 4 is thus clamped between the radially inner surface 135a of the cavity 135 and the surface radially. external projection 124.

A second rib 136 runs along the peripheral edge of the plate 130. Its radially inner surface 136a has, in FIG. 4, a diameter D2 slightly greater than the diameter DI of the pellet 120.

Once the system is in the locked position, the peripheral edge 125 of the pellet 120 (which is widened in its crushed position) thus cooperates with the radially internal surface of the rib 136, so as to radially pinch the membrane 4 between the pellet 120 and the plate 130 on a third continuous zone and closed on itself.

Between the first and the second rib, the front face of the plate 130 is generally flat.

A doubling process implementing the sealing system 100 described above comprises at least the following steps:

In a first step, bracing elements 2 are fixed to the doubling wall F, for example by snapping their clipping base 13 onto a profile P, generally horizontal, previously fixed on said wall F.

In a second step, at least one thermal and / or acoustic insulation layer 3 is hooked on or interposed between the bracing elements 2.

In a third step, a plate 130 is engaged on the section of ribbed rod 11 of each spacer member 2, and locked in position, generally against the insulating layer 3, by a quarter turn.

In a fourth step, a membrane 4 is plugged onto the bracing elements 2,

In a fifth step, a pellet 120 is engaged on the rod 10 to a locked position in which it is elastically deformed, its rear face being in axial abutment against the flat portion of the front face of the plate 130. In this position , the projecting portion 124 of the pellet 120 is engaged in the cavity 135 of the plate 130, and the peripheral edge of the pellet 120 comes into contact with the rib 136 of the plate 130. The membrane 4 is thus in contact with the pellet around its skewed opening 4a, at three concentric contact zones, continuous and closed on itself, corresponding to the nip regions of the two jaws.

In a sixth step, a holding element 5 of a doubling structure is engaged on each spacer element 2.

In a seventh step, a doubling structure 6 is brought into contact with at least one holding element 5. The example described above is not limiting. An alternative embodiment of this first embodiment is illustrated in particular in FIGS. 11 and 12.

The first jaw here is devoid of tabs 123, and the locking means in position of the two jaws relative to each other in the locking position comprise clipping means.

As illustrated in Figure 11, the first jaw 120 comprises male elements 127, in particular in the form of harpoons or mushrooms, projecting from its rear face 120b.

These male elements 127 are adapted to cooperate with corresponding orifices 137 formed on the front face of the second jaw (see Figure 12), without perforating the membrane.

In the example of Figures 11 and 12, the male elements 127 are dimensioned so that the assembly formed by their head covered by the membrane is adapted to be clipped into a respective orifice 137.

Figures 6 to 8 illustrate a sealing system 200 according to a second embodiment of the invention.

In this embodiment, the system 200 comprises a first jaw (hereinafter body) 220 having an engagement aperture 221 whose engagement edge 222 is adapted to match the profile of the ribbed rod portion 11 and thereby achieve a sealing with the rod 10, a second jaw (hereinafter nut) 230, and means for locking the first jaw in contact with the membrane.

As illustrated in Figure 6, the body 220 is intended to be mounted on the rod 10 before skew of the membrane 4, while the nut 230 is intended to be mounted on the rod 10 after skew of the membrane 4. In position mounted, the body 220 is placed at the rear of the membrane 4, and the nut 230 at the front.

As will be described in more detail below, the first and second jaws 220, 230 form a gland type system. The nut 230 is adapted to cooperate radially with the first jaw (body of the gland) 220 to deform the edge of the engagement opening 222 of the jaw 220 until it conforms to the profile of the jaw 220. section of ribbed rod 11, thereby sealing with the rod 10. This position corresponds to the locked position of the system.

In this position, the nut 230 and the body 220 are further adapted to clamp the membrane 4 between them axially.

The locking means of the two jaws in the locking position here comprise screwing means.

The structure of the body 220 and the nut 230 is described in more detail below.

As illustrated in FIG. 7, the body 220 has a generally cylindrical hollow shape, the through-cavity 221 of which forms an engagement opening for the engagement of said body 220 on the rod 10 of a spacer element 2.

The body 220 is preferably made of a relatively flexible material, especially a thermoplastic elastomer such as SEBS. In the particular embodiment shown, the profile of the edge 222 of the engagement opening 221 is a homothety of that of the rod portion 11. The engagement opening 221 is thus wide enough to allow the engagement of the body. 220 on the rod portion 11, but narrow enough so that the friction of the edge 222 on the rod portion 11 temporarily holds the body 220 before the establishment of the nut 230. In mounted position but not locked, the body 220 does not seal with the rod 10.

As illustrated in Figure 7, the body 220 comprises at least: a threaded portion 223 provided with a thread at its periphery, an outer flange 224 extending radially outwardly, preferably on one side (rear side) said threaded portion 223 and an end sealing portion 225 on the other side (front side) of said threaded portion 223.

Preferably, as illustrated in FIG. 7, the sealing portion 225 has, over at least a portion of its axial length, a gradually narrowed section towards the front end of the body 220a. For example, it has a generally frustoconical shape.

The sealing portion 225 is further provided with a plurality of substantially parallel through-slots 226 extending axially to the front end 220a of the body 220 where they open. The notches 226 thus delimit a plurality of disjoint sectors. The nut 230 is illustrated in greater detail in FIG.

Like the body 220, the nut 230 has a generally cylindrical shape. But it is preferably made of a more rigid material than that forming the body, in particular a polyolefin, for example polypropylene or polyethylene (filled or not with fiberglass or talc).

As illustrated in the figure, the nut 230 is provided with a cavity 231 opening at least at the rear end 230b, by which it is adapted to be mounted on the body 220. The nut 230 comprises at least: a threaded cavity section 233 adapted to cooperate by screwing with the threaded portion 223 of the body, further forward, a guide cavity portion 235 adapted to cooperate with the body sealing portion 225 to deform said portion by moving the radially inwardly, so as to bring the edge of the engagement opening 222 into close contact with the rod portion 11, and an outer collar 234 adapted to approach the outer collar 224 of the body 220 during the screwing, the two flanges 224, 234 being located axially opposite one another so as to be able to clamp the membrane 4 between them in the locked position of the system.

During assembly, the body 220 is first mounted on the rod 10. Then the membrane 4 is plugged on the rod 4, and possibly on the rear part of the body 220. Then the nut 230 is mounted on the rod 10, and screwed on the body 220. By penetrating the guide portion 235 of the cavity of the nut 230, the sealing portion 225 of the body 220 is deformed, to come to achieve sealing at the periphery of the rod 10. At the same time, the membrane 4 is clamped between the two collars 224, 234, respectively of the body 220 and the nut 230, to seal around the skewer opening 4a of the membrane 4. The membrane can also be pinched radially between the body 220 and the nut 230.

Figures 9 and 10 illustrate a sealing system 300 according to a third embodiment of the invention.

In this third embodiment, the sealing system 300 comprises a single jaw 320, in the form of a patch. As in the first embodiment described above, the jaw 320 has an engagement opening 321 whose profile is identical to that of the section of ribbed rod 11. The means for locking said jaw 321 in contact with the membrane 4 comprise here a strip of adhesive material 329 disposed on the rear face 320b of the jaw 320.

Preferably, to facilitate gluing, the rear face 320b of the jaw 320, or at least said pre-glued portion, is flat.

During assembly, the jaw 320 is simply engaged on the rod section 11 and then bonded to the membrane 4, bringing the strip 329 into contact with the front face of the membrane 4.

The examples described above are however not limiting.

In particular, although the set of jaws previously described in connection with the figures are presented as monolithic elements, each of these parts could, alternatively, be made of several parts fixed together appropriately.

Moreover, although FIGS. 1 and 2 illustrate a lining comprising a single membrane and a single layer of insulation, it is also possible to implement a sealing system according to the invention for sealing a membrane disposed between two layers of insulation. It is also possible to use several sealing systems according to the invention, of the same type or of different types, on the same spacer element, in the case of a lining comprising several membranes, for example separated by one or several layers of insulation.

Claims (18)

1. Sealing system (100, 200, 300) adapted to seal at the periphery of the skewer opening (4a) of a membrane (4) skewered on a rod section (11) s' extending in an axial direction (X) and provided at its periphery with a plurality of primary ribs (12), said sealing system comprising at least a first jaw (120, 220, 320) adapted to be engaged on said section of rod (11) by an engagement aperture (121, 221, 321), the edge (122, 222, 322) of the engagement aperture being adapted to conform to the shape of said rod portion (11), and means for locking said jaw in contact with said membrane. The sealing system (100, 300) of claim 1, wherein the engagement opening (121, 321) of the first jaw (120, 230) has a profile similar to that of the rod portion (11). ). The sealing system (200) according to claim 1 or 2, wherein the edge of the engagement opening (221) of the first jaw (220) is deformable to conform to the profile of the stem portion (it ). 4. Sealing system (300) according to any one of claims 1 to 3, wherein the locking means comprise adhesive means. The sealing system (100, 200, 300) according to any one of claims 1 to 4, wherein the contact area of the first jaw (120, 220, 320) with the membrane (4) is continuous and closed on itself. 6. sealing system (100, 200) according to any one of claims 1 to 5, further comprising a second jaw (130, 230) adapted to be engaged on the rod section (il). 7. A sealing system (100, 200) according to claim 6, wherein the locking means comprise means for locking the two jaws with respect to each other in a locking position in which the membrane (4) ) is clamped between said jaws (120, 220, 130, 230) around its skewed opening (4a). 8. sealing system (100, 200) according to claim 7, wherein the locking means comprise clipping means (127, 137). 9. Sealing system (100, 200) according to claims 7 or 8, wherein the locking means comprise screwing means (223, 233) of one of the first and the second jaw on the other jaw. . 10. A sealing system (100, 200) according to any one of claims 6 to 9, wherein the jaws (120, 220; 130, 230) are configured to axially clamp the membrane (4) around its opening. skewer, in the locking position. 11. Sealing system (100, 200) according to any one of claims 6 to 10, wherein the first and the second jaw (120, 130) comprise means adapted to cooperate to pinch the membrane radially around its skewer opening. 12. sealing system (100, 200) according to any one of claims 6 to 11, wherein the second jaw (130, 230) has a stiffness greater than that of the first jaw (120, 220). 13. Sealing system (100) according to any one of claims 6 to 12, wherein the first jaw (120) and / or the second jaw has means for cooperating with the primary ribs (12) of the stem section. (11) for translational locking of said jaw (120) relative to the rod portion (11) in the axial direction (X). 14. A wall lining assembly (F) comprising - a sealing system (100, 200, 300) according to any one of the preceding claims, - a spacer element (2) comprising a rod (10) having a skewered free end (10a) and at least one ribbed section (11) provided at its periphery with a plurality of primary ribs (12), and means for attachment to the wall to be doubled (13, 14, 15 ). 15. Dubbing of a wall, comprising - bracing elements (2) fixed on the wall to be doubled (F), said bracing elements (2) each comprising a rod (10) having a free end of skewering (10a) and at least one ribbed section (11) provided at its periphery with a plurality of primary ribs (12), - at least one layer of thermal and / or acoustic insulation (3) hooked on or interposed between the elements bracing (2), - a membrane (4) connected to the spacer elements (2), - on each bracing member (2), at least a first jaw (120, 220, 320) engaged by a engagement opening (121, 221, 321) on the ribbed shaft section (11) of said bracing member (2), said first jaw (120, 220, 320) being in a locked position in contact with the membrane (4) , and the edge of the engagement aperture (122, 222, 322) of each first jaw conforming to the shape of said rod section (11), - on each spacer element (2), a holding element (5) of a doubling structure (6). 16. Dubbing according to claim 15, further comprising, on each spacer element (2), at least one second jaw (130, 230) engaged on the ribbed rod section (11) of said spacer element (2). the first and second jaws (120, 130, 220, 230) being locked relative to one another in a locking position in which the membrane (4) is clamped between said jaws around its openings; skew (4a). 17. A method of doubling a wall (F) comprising: a) fixing on the wall of spacer elements (2) each comprising a rod (10) having a free end of skewering (10a) and at least a ribbed section (11) provided at its periphery with a plurality of primary ribs (12), b) the embrocherner on or intercalation between the bracing elements (2) of at least one layer of thermal insulation and / or acoustically (3), c) in this order or in reverse order, recoiling of a membrane (4) on the bracing elements (2), the engagement of a first jaw (120, 220, 320) on the ribbed rod section (11) of each spacer element (2), the edge of the engagement opening (121, 221, 321) of said first jaw (120, 220, 320) conforming to form of said rod section (11), and the locking of said first jaw (120, 220, 320) in contact with the membrane (4), f) the engagement on each spacer element isement (2) of a holding element (5) of a doubling structure (6), and g) contacting a doubling structure (6) with at least one holding element (5). 18. A method of doubling according to claim 17, further comprising, in step c), the engagement of a second jaw (130, 230) on the ridge stem section (11) of each spacer element ( 2), locking said first jaw (120, 220) against the membrane (4) comprising locking the two jaws with respect to each other in a locking position in which the membrane (4) is clamped between said jaws around its skewed opening (4a).