FR3027327B1 - DETECTION DEVICE FOR FIXING A SUPPORT PROFILE OF A DUAL-WALL FENCE OF A WALL TO BE ISOLATED - Google Patents

Abstract

The present invention relates to a bracing device (10) for the adjustable fixing of a support profile of a lining partition remote from a wall to be doubled by a fibrous insulation, said device comprising: - a rod Device (30) having a rear end (11) provided with a fixing plate (20) to said wall to be doubled and a front end (12) terminating in a point (32) and provided with means (50, 60) for in the active position of use, clamping a membrane to hold it at a desired distance from said wall, - a head (60) for supporting the profile adapted to be positioned at the front end (12) of the rod (30) , characterized in that the clamping means (50, 60) comprise a stop ring (50) formed integrally with the longitudinal rod (30), and said support head (60) coming into position d use, to fix itself around the rod (30) to form, with the ring (50), an axial locking jaw of e the membrane.

Description

The present invention relates to a bracing device for the adjustable fixing of a support profile of a lining wall remote from a wall to be doubled by a thermal and / or sound insulation of fibrous type.

There are currently various ways of thermally and / or acoustically isolating a wall such as a wall, a ceiling or a roof of building using an insulation complex (fibrous insulation), whether in a new construction or during a renovation.

For this, it is common to use a partition (against wall or false ceiling) said dubbing (for example a thin plasterboard type BA13 or other) that is just fixed, usually not screwing, on a metal framework consisting of rails to place it away from the wall.

However, these rails must be fixed to said wall to be insulated, for example to beams such as rafters or ceiling joists, using spacers that maintain the insulation and a membrane membrane -air (wind and / or vapor barrier) between the lining wall and the wall to be doubled. This membrane is most often interposed between the layer of fibrous material and the lining wall, typically contiguous to the partition, optionally interposed between two layers of fibrous material. Thus, to cover an entire surface to be insulated, multiple regularly spaced spacers are used.

Each spacer typically comprises a rod-shaped main body extending transversely to the wall to be doubled and to the doubling wall, one end of which is provided with means for attachment to a structural element of the wall to be doubled and whose another end is provided with means for supporting the metal backing frame. Such a bracing accessory is for example known from WO 2006/061538.

During installation, the insulation complex is socketed on the rod of each spacer accessory, which causes multiple piercing layers of fibrous material and, where appropriate, the air barrier membrane. This piercing is particularly detrimental with respect to the membranes, because their sealing function, permanent or selective, is then altered. The piercing of the membrane may further constitute a tear initiation likely to spread if too much tension is exerted.

To partially avoid this problem, it is known to have the membrane on the inner side of the metal frame, between the latter and the lining wall. The membrane is not pierced by a spacer and can remain intact, at least initially. However, the attachment of the lining wall to the metal frame involves the piercing of the membrane by fasteners (staples, or self-drilling screws for example), which, although to a lesser extent, adversely affects sealing of the membrane.

The positioning of the membrane in front of the metal frame raises another technical problem. Indeed, this configuration leaves no space (air gap) between the membrane and the lining wall. However, it is often necessary to insert, behind the dubbing wall, different cables (electricity, ventilation, telecommunications, computer) or pipes (water network, air conditioning). It is therefore difficult to envisage, if not impossible, to place these accessories between the membrane and the lining wall.

These cables or pipes can be placed behind the membrane, but it is no longer possible to access them 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. All these operations affect the integrity and the tightness of the membrane.

An object of the present invention is therefore to solve the problems mentioned above, with the aid of a solution that is simple to manufacture, inexpensive, easy to implement and optimized in terms of efficiency, particularly as regards the respect of the integrity and sealing of the membrane while providing a sufficiently large and accessible space behind the lining wall to pass accessories such as cables or pipes.

Thus, the subject of the present invention is a bracing device for the adjustable fixing of a support section of a lining partition at a distance from a wall to be doubled by a thermal and / or sound insulation of fibrous type, said device comprising: a longitudinal rod extending in an axial direction and having a rear end provided with a fixing plate to said wall to be doubled and a front end ending in a point and provided with means for, in the active position of use , pinching an air barrier membrane to hold it at a desired distance from said wall, a hollow support head of the profile adapted to be positioned at the front end of the longitudinal rod, characterized in that the clamping means comprise a radial stop ring, formed in one piece with the longitudinal rod, and said support head coming, in the active position of use, to be fixed around said rod for fo rmer, with said radial stop ring, an axial locking jaw of said membrane.

According to preferred embodiments, the device according to the present invention comprises at least one of the following features: the support head is mounted and held around the rod by radial clipping; the support head is removably mounted and held in place around the rod with a key therethrough cooperating with said rod; the support head has through radial apertures for the passage through them of the key, which is shaped "U" with two elastically deformable branches to move away and then tighten around the rod after passing through the openings; - The device comprises at least one harpoon erected radially on the rod, the tip of said harpoon being oriented rearwardly to the plate to maintain the thermal insulation and / or fibrous acoustic in position by anchoring therein; said harpoon is disposed in close proximity to the second end and begins substantially at the radial stop ring; - The device is provided with two identical harpoons located on either side of the rod, in the same radial plane parallel to the mounting plate; - The head is provided with at least a first annular seal formed on a nip surface facing the radial stop ring and bearing on the latter in the active position of use; - The head is provided on the nip surface, a second annular seal coaxial with the first seal and disposed substantially at the periphery of said nip surface; - Each seal consists of an elastomeric bead projecting from the nip surface; the head has a dome-shaped portion provided with a peripheral groove in which a doubling wall support profile such as a metal rail can slide; the head has an axial space between the base of the domed portion and the nip surface; said gap is between about 5 mm and 20 mm, preferably between 10 and 15 mm; - The base of the tip of the stem has notches regularly distributed on its periphery; - The rod comprises a metal reinforcing core, for example a threaded rod, covered with molded plastic material; - The plate is formed by two fins erected radially on the rod and formed integrally therewith, each fin having a first series of orifices aligned parallel to the rod and two end lugs each having a more distant orifice. of the stem as the first set of orifices; the rod further comprises, at the level of the plate, markers defining the positioning limits of said device on the wall to be doubled, for example on a beam such as a chevron; the plate comprises two marks of extreme positions between which are provided at least one other intermediate mark, preferably two, and preferably three intermediate markers, the distance between two consecutive marks is preferably always the same, for example about 1 centimeter; the device also comprises a removable ogival-shaped cap comprising a hollow drum for mounting it around the front end of the rod, said hollow drum having an external diameter identical to or slightly smaller than that of the radial stop ring; , and a very pointed end to facilitate the racking of the insulation; - The barrel of the cap has protrusions extending radially inside the latter to cooperate with the outer surface of the front end of the rod once said cap mounted around it in order to promote its retention in position ; and - the cap is provided on its outer surface, gripping notches to facilitate its removal, arranged for example on either side of the barrel. The invention will now be described in more detail with reference to particular embodiments given by way of illustration only and represented in the appended figures in which:

Figure 1 is a perspective view of a main portion of a spacer according to the present invention;

Figure 2 is a perspective view of the spacer provided with a support head, in a position before use;

Figures 3 and 4 are front and rear perspective views of a support head belonging to the spacer of the present invention;

Figure 5 is a schematic view of the different steps of installation of the spacer;

Figures 6 to 10 are top views showing each step of Figure 5;

Figures 11 and 12 are alternative embodiments of Figure 6;

Figures 13 to 17 are alternative embodiments of the support head and its mounting and holding means on the spacer;

Figure 18 is a front view of an alternative embodiment of a rear portion of the spacer;

Figure 19 is an exploded perspective view of a cap and a front end of the spacer around which it is to be mounted; and

Figure 20 is a perspective view similar to Figure 18 but in which the cap is mounted around the rod.

Figures 1 and 2 show a spacer 10 (also called hanger) according to the present invention and for adjustably fixing a support profile of a lining wall remote from a wall to be doubled by a thermal insulation and / or fibrous type acoustics.

This spacer 10 comprises a mounting plate 20 extending at a rear end 11, by a main longitudinal rod 30 terminating at a front end 12 by a tip 32. Typically the spacer 10 measures a few centimeters to a few tens of centimeters, preferably between about 10 cm and 40 cm, for example 20 cm, the single rod measuring about 15 cm in this case.

The tip 32 of the rod 30 has notches 33 distributed evenly around its periphery.

The rod 30 consists of a metal core (not visible), for example a threaded rod, covered by overmolding a thin layer of plastic material 31. The spacer 10 comprises, close to its front end 12, two harpoons 40 arranged radially on the rod 30 and allowing, as will be described later, to be planted in a fibrous insulation to prevent it from moving and / or detach from the wall to be insulated. For this purpose, the tip 41 of each harpoon 40 is oriented towards the rear end 11 of the spacer 10. The harpoons 40 are raised radially on the rod 30 by a few millimeters, for example 1 to 5 mm, preferably 2 to 3 mm. The two harpoons 40 are identical and located on either side of the rod 30, in a same radial plane parallel to the mounting plate 20. The spacer 10 also comprises, beyond the harpoons 40, a radial ring of stop 50 formed by a molded plastic ring undeformable (that is to say non-elastic). Advantageously, the outer diameter of this ring 50 is greater by a few millimeters than that of the rod 30, for example from 0.5 to 3 mm and preferably from approximately 1 to 2 mm.

The mounting plate 20 has two fins 22 arranged radially on the rod 30 and formed integrally therewith during overmoulding of plastics material. Each fin 22 comprises a first series of orifices 24 aligned parallel to the rod and two end lugs 25 each having an orifice 26 further from the rod than the first series of orifices 24.

The mounting plate 20 also comprises pins 28 defining the positioning limits of the spacer 10 on the wall to be doubled, for example on a beam such as a chevron. These marks 28 are constituted by two lines of plastic material in overthickness oriented perpendicular to the rod 30 and spaced a few centimeters, for example between 1 and 8 cm, preferably about 2 to 5 cm, for example 4 cm. They make it possible to adjust the positioning of the spacer according to the dimensions of the structure on which it is fixed and the thickness of the insulation used. The spacer 10 finally comprises an independent head 60 (also called cap or key) provided for, in the use position, irreversibly clipping or dismountable around the rod 30, against the radial stop ring 50, like this will be described later.

The head 60 has a domed end portion 61 provided with a peripheral groove 62 into which can slide a support section 8 such as a metal rail "C" of known type on which is screwed a doubling wall such as a plasterboard.

The head 60 is provided with a first annular seal 64 formed on a nip surface 65 facing the radial stop ring 50 and bearing on the latter in the active position of use.

The head 60 is also provided on the nip surface 65 with a second annular seal 66 coaxial with the first seal 64 and disposed substantially at the periphery of said nip surface.

Each seal 64 and 66 is constituted by an overmolded elastomeric bead protruding from the gripping surface 65 and ensuring a good airtightness.

The head 60 further has an axial space 68 between the base 63 of the dome 61 and the nip surface 65, said gap 68 being between about 5 mm and 20 mm, preferably between 10 and 15 mm. The use of the spacer according to the present invention is in several steps, illustrated by FIGS. 5 to 10.

In the example presented, it will be necessary to achieve an interior lining insulation of the attic of a house, especially its roof.

In a first step (reference 1, figure 5, figure 6) the spacer 10 is fixed cantilevered on the wall to be insulated, in particular on a chevron 5 of framework. For this, the installer places the plate 20 perpendicularly to the side of the chevron 5 and positions it using the pins 28 to adjust the length that will exceed the chevron. The marks 28 thus make it possible to define the minimum and maximum positioning distances of the spacer 10 with respect to the edge of the chevron 5, as illustrated by FIGS. 11 and 12. Thus, the latter can take all the possible positions between these two limits. to adapt to the conditions of implantation of the insulation and the lining wall without harming its fixing. Beyond the limits, especially if the spacer 10 protrudes too much from the chevron 5, the attachment may be insufficient, or even detach or break.

Once the plate 20 is positioned, the installer fixes the spacer 10 in the side of the chevron 5 by placing screws (not shown) through the orifices 24 and 26. For this, it is advisable to distribute the screws longitudinally and on either side of the central rod 30. Advantageously, the screws are placed at the ends of each fin 22, that is to say in the orifices 26 of the lugs 25. Four screws are sufficient but it is possible to add in the other 24 holes available to strengthen the attachment.

This solution avoids the plates with weakness zones breakable of the prior art which lacked precision in their adjustment. The installer repeats these positioning and screwing operations for each spacer 10 along the various rafters of the wall to be insulated.

Once all the spacers 10 fixed, the installer is stuck on it fibrous insulation 2, for example based on rock wool or glass. This operation, illustrated by reference numeral 2 in FIG. 5 and in FIG. 7, is facilitated by the notched tip 32 of the front end 12 of each spacer 10. The installer bears on the insulator 2 so that the harpoons 40 hangs in the fibers. Given the large number of spacers 10, the fibrous insulation material 2 remains well maintained in place thanks to the points 41 of harpoons 40. This prevents it from falling, which could have the effect of reducing the quality of the insulation .

When the insulator 2 is hooked and held in place, the installer then positions an air barrier membrane 3 by also attaching it to the pointed front end 32 of each spacer 10, as represented by the reference 3 FIG. 5 and FIG. 8. This membrane of known type has a permeance to water vapor that varies according to the ambient humidity. During this operation, it is important to ensure that the sealing membrane 3 does not protrude through the radial stop ring 50 against which it must rest. Thus, the sealing membrane 3 is slightly spaced from the insulator 2. In view of the intrinsic elasticity of the material constituting the sealing membrane 3, the orifice formed during perforation by the spacer 10 closes around of the rod 30, which contributes to good thermal insulation. The thickness of this kind of membrane is typically between 5 and 600 micrometers. The assembly consisting of the layer of fibrous material and the sealing membrane is commonly called insulation complex.

The sealing membrane 3 being placed, the installer comes to block it by clipping the head 60 of each spacer 10 on its rod 30. During this operation, illustrated by the reference 4 of Figure 5 and Figure 9, the gripping surface 65 comes into contact with the sealing membrane 3 and forms, with the radial stop ring 50, a jaw. Thus, the sealing membrane 3 is sandwiched between the radially stable stop ring 50 and the gripping surface 65 of the head 60 on a continuous contact surface. The two seals 64 and 66 of the gripping surface 65 of the head 60 make it possible to avoid heat losses (fresh or hot air). For this purpose, the smallest peripheral seal 64 is substantially of the same external diameter as that of the radial stop ring 50 so as to trap the sealing membrane 3 between them.

In the last step, once all the heads 60 clipped on the rods 30 of the spacers 10, the installer can position the support rails 8 in "C" type known (also called furs) by inserting the branches of the "C" in the peripheral groove 62 of each head, as shown in reference numeral 5 of FIG. 5 and in FIG.

Before screwing the BA13 type plasterboard (or other) on the metal rails 8, it is possible to use the axial space 68 to position various electric cables or water pipes without damaging the insulation complex and in particular the sealing membrane 3.

It will be noted that the sealing membrane 3 is disposed at a distance from the rails, and therefore the facing plates. The vacuum zone provided between the waterproofing membrane 3 and the rails / gypsum boards also significantly improves the thermal and / or acoustic insulation of the lining and thus of the part to be insulated.

Thus, by the present invention, it is possible to thermally and / or acoustically isolate a wall such as a wall, a frame or a ceiling, using easy-to-use, robust and adjustable spacers. Because of the design of these spacers 10, the fibrous insulation 2 is perfectly maintained in place thanks to the numerous harpoons 40. The sealing membrane 3 is also positioned in an optimized manner to ensure good insulation. The axial space 68 of the head 60 makes it possible to place various cables or pipes and to modify them or to add / remove them if need without risk of perforating the sealing membrane 3. Finally, this spacer 10 is adapted to the support rails usual.

According to an alternative embodiment illustrated in FIGS. 13 to 17, the head 60 can be removably fastened to the rod 30 of the spacer 10. For this purpose, the head 60 is provided with through radial openings 67 and 69 for to receive a key 70 illustrated in detail in Figure 16). More specifically, the head 60 has in its structure, at the axial space 68, a first inlet opening 67 and, on the opposite side, two smaller outlet openings 69 aligned with the inlet opening 67 The inlet opening 67 is substantially wider than the total width of the two outlet openings 69.

When the installer wishes to complete the installation of a spacer 10 whose rod 30 is fixed on a chevron as described above, it assembles the head 60 on the end of the rod 30 in order to abut the pinch surface 65 with the radial stop ring 50, then it introduces the key 70 in the inlet opening 67. The branches 72 of the key being elastically deformable, they move radially to the passage of the rod 30 and then come closing around the latter before coming out of the head 60 through the outlet openings 69.

More specifically, the key 70 comprises a hollow inner portion 75 with a circular section which engages the rod 30, which for this purpose has substantially the same diameter.

Thus the head 60 is locked axially on the rod 30 so that it is then possible to come up the support rails of the insulation plates.

An alternative embodiment of the spacer according to the invention is the subject of FIG. 18. As can be seen, the plate 20 comprises two extreme position markers 28 between which three other intermediate marks 29 are provided, the distance between two consecutive marks being always the same. In the example shown, the two extreme marks are arranged 4 cm apart so that each space between two consecutive marks is 1 cm, which allows a finer adjustment during installation.

In accordance with Figures 19 and 20, the spacer 10 also has a removable cap 80 shaped ogive to be positioned around the indented tip 32 of the rod 30 to facilitate the racking of the insulation. For this purpose, the cap 80 comprises a hollow hollow shaft 81 having, at its base, a maximum external diameter identical to or slightly less than that of the radial stop ring 50, and a very pointed end 82.

In addition, so that the cap 80 can be held in position during the hook-up, the latter comprises protuberances 83 extending radially inside the barrel 81 in order to cooperate with the external surface of the front end 12 of FIG. the rod 30 once said cap 80 mounted around it bearing against the radial stop ring 50 (see Figure 19).

Finally, cap 80 is also provided on its outer surface with gripping notches 85 to facilitate its removal, said notches being for example arranged on either side of the shaft 81.

It goes without saying that the detailed description of the subject of the invention, given solely by way of illustration, does not in any way constitute a limitation, the technical equivalents also being included in the scope of the present invention.

Thus, the rod may comprise more than two harpoons, for example four, or arranged on the same circumference and for example regularly spaced 90 °, or axially offset by a few centimeters. In this second case, the pairs of harpoons can be aligned or offset angularly by 90 °. The spacer can also be attached to joists or ceiling beams.

Claims (15)

1. spacer device (10) for the adjustable fixing of a support profile (8) of a lining partition at a distance from a wall to be doubled by a thermal and / or sound insulation (2) of fibrous type , said device comprising: - a longitudinal rod (30) extending in an axial direction and having a rear end (11) provided with a fixing plate (20) to said wall to be doubled and a front end (12) is terminating in a point (32) and provided with means (50, 60) for, in the operative position of use, clamping an air barrier membrane (3) to hold it at a desired distance from said wall, - a hollow head ( 60) of the profile (8) adapted to be positioned at the front end (12) of the longitudinal rod (30), characterized in that the clamping means (50, 60) comprise a radial stop ring ( 50), formed integrally with the longitudinal rod (30), and said support head (60) coming into position a ctive use, to be fixed around said rod (30) to form, with said radial stop ring (50), an axial locking jaw of said membrane (3). 2. Device (10) according to claim 1, characterized in that the support head (60) is mounted and held around the rod (30) by radial clipping. 3. Device according to claim 1, characterized in that the support head (60) is removably mounted and held in place around the rod (30) by means of a key (70) therethrough cooperating with said rod (30). 4. Device according to claim 3, characterized in that the support head (60) has through radial apertures (67, 69) for the passage through them of the key (70), which is shaped "U" having two branches (72) resiliently deformable to deviate and then tighten around the rod (30) after passing through the openings (67, 69). 5. Device (10) according to any one of the preceding claims, characterized in that the head (60) is provided with at least one first annular seal (64) formed on a nip surface (65) making facing the radial stop ring (50) and bearing on the latter in the active position of use. 6. Device (10) according to claim 5, characterized in that the head (60) is provided on the nip surface (65) with a second annular seal (66) coaxial with the first seal (64). ) and disposed substantially at the periphery of said nip surface (65). 7. Device (10) according to any one of the preceding claims, characterized in that the head (60) has a dome-shaped portion (61) provided with a peripheral groove (62) in which can slide a profile (8) lining wall support such as a metal rail. Apparatus (10) according to claims 5 and 7, characterized in that the head has an axial space (68) between the base (63) of the dome portion (61) and the nip surface (65). 9. Device (10) according to any one of the preceding claims, characterized in that the rod (30) comprises a metal reinforcing core, for example a threaded rod, covered with molded plastic material. 10. Device (10) according to any one of the preceding claims, characterized in that the fixing plate (20) is formed by two fins (22) erected radially on the rod (30) and formed in one piece with the each fin (20) having a first series of orifices (24) aligned parallel to the rod (30) and two end lugs (25) each having an orifice (26) further from the rod (30). than the first set of orifices. 11. Device (10) according to any one of the preceding claims, characterized in that the rod (30) further comprises, at the plate (20), marks (28) defining the positioning limits of said device on the wall to be doubled, for example on a beam such as a chevron (5). 12. Device according to claim 11, characterized in that the plate (20) comprises two end position markers (28) between which are provided at least one other intermediate mark (29), preferably two, and preferably three intermediate markers, the distance between two consecutive marks (28; 29) is preferably always the same, for example about 1 centimeter. 13. Device according to any one of the preceding claims, characterized in that it also comprises a removable cap (80) shaped ogive having a hollow shaft (81) for mounting around the front end (12). the shaft (30), said hollow shaft (81) having a maximum outer diameter at its base that is the same as or slightly smaller than that of the radial stop ring (50), and a pointed end (82) for facilitating the racking of insulation. 14. Device according to claim 13, characterized in that the barrel (81) of the cap (80) has protuberances (83) extending radially inside the latter to cooperate with the outer surface of the front end. (12) of the rod (30) once said cap (80) mounted around it to promote its retention in position. 15. Device according to claim 13 or 14, characterized in that the cap (80) is provided on its outer surface with gripping notches (85) to facilitate its removal, arranged for example on either side of the barrel (81).