Improved anchoring device for foaming.

Abstract

------------------ Device (1), comprising: a base (10) extending in a longitudinal direction (MD) and a transverse direction (CD), having an upper face (12) and a lower face (14) opposite the upper face (12), an anchoring strip (30), comprising a bottom (31) comprising interlaced warp threads and weft threads, a plurality of loops (35) extending from the bottom (31), each loop (35) comprising two feet extending from the bottom, and a head forming the end of the loop (35) opposite the feet, an adhesive (40) securing the anchoring strip (30) to the lower face of the base (10) via the heads of the loops (35), so as to define a non-zero spacing between the base (10) and the bottom (31) of the anchoring strip (30), the adhesive (40) and the base (10) being formed from separate materials. Figure for abstract: Fig. 6

Description

Title of the invention: Improved anchoring device for foaming. Technical field

[0001] The present disclosure relates to the field of anchoring systems, in particular for fixing linings to foam. Prior art

[0002] Self-gripping type retaining systems are commonly used for the production of anchoring systems for fixing foam linings, for example for vehicle seats or coverings.

[0003] Commonly used systems comprise a base having an upper face from which retaining elements protrude, and an opposite lower face. The retaining elements are typically elements such as hooks or more generally elements adapted to produce a self-gripping connection with a counterpart such as loops. The lower face is provided with a set of loops. The device is integrated into a product during a foaming operation, which partially surrounds the base. The loops ensure robust anchoring of the device in the foam, the latter being injected in liquid form and therefore interpenetrating the loops.

[0004] It is understood, however, that the retaining elements must be protected during the foaming operation. Indeed, a deposit of foam on the retaining elements would render them inoperative. A commonly adopted solution is thus to deposit a protective coating on the upper face of the base, this protective coating then being removed after the foaming operation. Such a method is however complex to implement; in particular the operation of removing the coating is problematic in terms of industrialization.

[0005] Alternative methods have been considered, aimed at doing away with this protective coating. However, this poses a problem related to the packaging of products ready to be cut in rolls or alternatively directly in a cardboard box after cutting the products; the retaining elements then engage the loops, which is restrictive for handling the product.

[0006] [Fig.l] schematically represents an example of such a known device.

[0007] This figure shows a device 100 comprising a base 110 extending in a main direction MD and a machine direction CD. The base has an upper face 112 and a lower face 114. Retaining elements 120 extend from the upper face 112 of the base 110, the retaining elements as shown being commonly referred to as having a mushroom shape, and are suitable for making a self-gripping connection with a counterpart such as loops or complementary retaining elements which may be identical or distinct.

[0008] An anchoring strip 130 is secured to the lower face of the base 110. The anchoring strip 130 has a bottom 131 for which an upper face 132 and a lower face 134 are defined. Loops 135 extend from the lower face 134, so as to form anchoring means in the foam as indicated previously.

[0009] The anchoring strip 130 is typically secured to the base 110 by means of an adhesive 140 shown here between the lower face 114 of the base 110 and the upper face 132 of the bottom 131 of the anchoring strip 130.

[0010] As indicated previously, the retaining elements 120 are typically wrapped in a protective coating 150 deposited on the upper face 112 of the base 110 so as to wrap all or part of the retaining elements 120. This protective coating 150 must then be removed following the performance of a foaming operation aimed at anchoring the device 100 in a foam element, the anchoring being notably achieved by the integration of the loops 135 in the foam.

[0011] As indicated previously, the removal of this protective coating 150 is problematic and restrictive. Removing this protective coating poses problems linked to the protection of the retaining elements 120 during the foaming operation, and also linked to the packaging because the retaining elements 120 then engage the loops 135 when the product is packaged in rolls ready to be cut or is packaged freely in a cardboard box after cutting.

[0012] Other anchoring systems are commonly used for fixing several layers together, for example to perform an insulation function, in particular thermal and / or acoustic and / or mechanical and / or light and / or air and / or humidity insulation. The commonly used systems have varied structures and are made of very different materials depending on the intended application and / or the performance to be achieved.

[0013] Commonly used systems generally comprise either a stack of many layers of different material and having different structures to achieve the desired performance for the application without this structure being able to be used for different functions and / or applications, or a single layer with different structures. It is understood that such systems are restrictive due to their specificities. There is therefore a need to produce systems having a simpler structure and which can be used for diverse and varied applications.

[0014] This presentation thus aims to respond at least partially to these problems. Statement of the invention

[0015] In order to respond at least partially to the aforementioned problems, the present presentation concerns a

[0016] Device, comprising: - a base extending in a longitudinal direction and a transverse direction, having an upper face and a lower face opposite the upper face, the upper face being provided with retaining elements, - an anchor strip, comprising * a background comprising interwoven warp and weft threads, * a plurality of loops extending from the bottom, each loop comprising two legs extending from the bottom, and a head forming the end of the loop opposite the legs, characterized in that the device comprises a securing means securing the anchoring strip to the lower face of the base via at least part of the heads of the loops, in particular so as to define a non-zero spacing between the base and the bottom of the anchoring strip, and in that the securing means and the base are formed from separate materials.

[0017] Thus, the device has a bottom with lower residual deformation than the prior art and with better resistance to deformation, in particular better resistance to compression, and better distribution of the force applied to the bottom of the anchoring strip and / or potentially better resistance to traction and / or shear after its anchoring in a material.

[0018] According to one example, the bottom of the anchoring strip and the base are spaced apart by a distance of between 0.2 mm and 10 mm, or between 0.5 mm and 7 mm, in certain cases between 0.5 mm and 5 mm, in particular between 2.5 mm and 5 mm.

[0019] According to one example, the anchoring strip comprises a grammage per unit area of between 25 and 350 g / m2, in particular between 30 and 220 g / m2, or between 50 and 220 g / m2.

[0020] According to one example, the anchoring strip comprises an apparent density, calculated by the ratio of the grammage per unit area (in g / m2) and the height of the anchoring strip (in mm) of between 1 and 500 kg / m3, in particular between 2 and 200 kg / m3, 3 and 100 kg / m3.

[0021] According to one example, the two loop portions arranged between the head of the loop and respectively the loop feet extend in a direction not perpendicular to the plane formed by the bottom and / or a direction not perpendicular to the plane comprising the longitudinal direction and the transverse direction.

[0022] According to one example, the two loop portions arranged between the head of the loop and respectively the loop feet have a different shape, for example, one rectilinear or substantially rectilinear and the other is curved or substantially curved.

[0023] According to one example, the bottom has a thickness of between 30 micrometers and 1200 micrometers, in particular between 50 micrometers and 800 micrometers.

[0024] According to one example, the loops comprise a crossing of feet.

[0025] According to one example, the anchoring strip, in particular the bottom, comprises, according to a view perpendicular to the plane comprising the longitudinal and transverse direction, a number of openings of between 5 and 100 openings per cm2, with in particular each opening having a surface area of at least 1.0 mm2 or a number of openings of between 5 and 60 openings per cm2, with in particular each opening having a surface area of at least 1.5 mm2, or a number of openings of between 5 and 50 openings per cm2, with in particular each opening having a surface area of at least 1.8 mm2. According to one example, the openings have a general shape of square, rectangle, trapezoid, circle or other.In a particular case, the shape of the opening has an asymmetry in the longitudinal and / or transverse direction making it easier to insert the envelope into the anchoring strip, which envelope is formed, for example, from a foam material and / or plaster and / or concrete and / or a crosslinkable plastic material (“crosslinked” according to the usual designation in English) and / or a thermosetting material.

[0026] According to one example, the anchoring strip, in particular the bottom, comprises, according to a view perpendicular to the plane comprising the longitudinal and transverse direction, an opening rate (surface of the open bottom / surface considered) of between 50% and 90% per cm2, in particular between 60% and 90% per cm2, more particularly between 70% and 90% per cm2.

[0027] According to one example, the heads of the loops are secured to the lower face of the base so as not to protrude from the upper face of the base.

[0028] According to one example, at least 50% of the loops of the anchoring strip are secured to the lower face of the base, or typically at least 75% of the loops of the anchoring strip are secured to the lower face of the base or in certain cases, 100% of the loops of the anchoring strip are secured to the lower face of the base.

[0029] According to one example, the upper face of the base is provided with retaining elements.

[0030] According to one example, the anchor strip comprises a plurality of foot loops which are arranged in the plane of the bottom and / or extend projecting from the lower face of the bottom (or the anchor strip).

[0031] According to one example, the foot loops have a shape whose dimensions are all smaller than the dimensions of the loops extending in projection from the su- superior.

[0032] According to one example, the foot loops and the projecting loops of the upper face are made from the same yarn; there is therefore typically a continuity of material between the foot loops and the projecting loops of the upper face.

[0033] According to one example, the base is formed of a woven and / or knitted material, each retaining element comprises a stem and a head, the stem extending from the upper face of the base, and the head being formed at a free end of the stem opposite the upper face of the base, the stems of the retaining elements extending at least partly into the woven and / or knitted material of the base.

[0034] The base is typically formed from synthetic monofilament and / or multifilament yarns, typically interlaced, in particular by weaving and / or knitting, for example a multifilament with a number of filaments between 2 and 25 filaments, in particular between 2 and 15 filaments.

[0035] Said synthetic threads are for example made of at least one or more thermoplastic materials.

[0036] The wires typically have a diameter between 30 and 600 micrometers, or between 70 and 550 micrometers.

[0037] According to one example, the bottom of the anchoring strip extends continuously in the longitudinal direction.

[0038] The securing means is typically an adhesive or glue.

[0039] According to one example, the device comprises a plurality of anchoring strips superimposed so as to define several layers of anchoring strips in a direction perpendicular to the lower face of the base.

[0040] According to one example, the anchoring strips of the various successive superimposed layers extend in perpendicular directions. The device may thus have, for example, a superposition of layers for which the anchoring strips extend continuously in the longitudinal direction and in the transverse direction.

[0041] According to one example, the anchoring strips of the superimposed layers are secured to each other by means of an adhesive.

[0042] According to one example, the upper face of the base is provided with retaining elements, for example retaining elements for forming a self-gripping fastening, in particular formed by weaving, knitting, injection molding or extrusion molding.

[0043] According to one example, the base is formed of a woven and / or knitted material, each retaining element comprises a rod and a head, the rod extending from the upper face of the base, and the head being formed at a free end of the rod opposite the upper face of the base, the stems of the retaining elements extending at least partly into the woven and / or knitted material of the base.

[0044] According to one example, the upper face of the base is provided with a layer comprising a vapor barrier film and / or an airtight film and / or kraft paper and / or a wall covering and / or a plasterboard and / or a cardboard sheet and / or a decorative or other covering.

[0045] The invention also relates to an assembly which comprises an envelope and a device as defined previously, in which the envelope at least partly surrounds the anchoring strip, in particular at least partly surrounds the loops of the anchoring strip and / or the bottom of the anchoring strip.

[0046] The envelope is for example formed from a foam, plaster or concrete material and / or a crosslinkable plastic material (“crosslinked” according to the usual designation in English) and / or a thermosetting material. Brief description of the drawings

[0047] The invention and its advantages will be better understood upon reading the detailed description given below of different embodiments of the invention given as non-limiting examples.

[0048] [Fig-1] [Fig.l] represents an example of a known device.

[0049] [Fig.2] [Fig.2] represents an example of a device according to one aspect of the invention.

[0050] [Fig.3] [Fig.3] represents another view of the device shown in [Fig.2].

[0051] [Fig.4] [Fig.4] represents an example of application.

[0052] [Fig.5] [Fig.5] represents another example of application.

[0053] [Fig.6] [Fig.6] represents another example of application.

[0054] [Fig.7] [Fig.7] represents another example of application.

[0055] [Fig.8] [Fig.8] represents another example of application.

[0056] Throughout the figures, the elements in common are identified by identical numerical references. Description of the embodiments

[0057] Figures 2 and 3 show an example of a device according to one aspect of the invention.

[0058] These figures show a device 1 comprising a base 10 and a strip anchor 30.

[0059] The base 10 has a strip shape extending in a longitudinal direction MD and a transverse direction CD. The longitudinal direction is commonly referred to as the machine direction. An upper face 12 and a lower face 14 are arbitrarily defined for the base 10. For the purposes of illustration, it will be considered that the upper face 12 and the lower face 14 are planar or substantially planar. A vertical direction ZZ is defined, perpendicular to the direction longitudinal MD and to the transverse direction CD, and therefore perpendicular to the upper face 12 and to the lower face 14 of the base 10.

[0060] The base 10 is typically produced by injection and / or extrusion, and is for example formed in one piece with the retaining elements. In an embodiment which corresponds to the illustrated example, the base 10 is a woven fabric which comprises a ground yarn and a warp yarn intertwined with each other. In an alternative embodiment, the base 10 is a knit comprising a ground yarn and a warp yarn intertwined with each other. The base 10 may also be formed by a continuous or non-continuous strip of material.

[0061] The base 10 is typically formed from woven monofilament and / or multifilament synthetic yarns. For example, the loop yarns and / or the weft yarns and / or the warp yarns are monofilament or multifilament yarns, for example a multifilament with a number of filaments of between 2 and 25 filaments, in particular between 2 and 15 filaments. Said synthetic yarns are for example made of thermoplastic material. The yarns typically have a diameter of between 30 and 600 micrometers, or between 70 and 550 micrometers.

[0062] In the illustrated embodiment, a plurality of retaining elements 20 extend from the upper face 12 of the base 10. The retaining elements 20 are adapted to cooperate with a counterpart, which may be for example complementary or identical retaining elements, loops or a non-woven material, to produce a self-gripping connection. As will be seen later, the retaining elements 20 are optional, and the invention also has technical effects in the absence of such retaining elements 20.

[0063] In the illustrated example, the retaining elements 20 are formed by wires arranged at least partly in the base 10. More particularly, the wires forming the retaining elements 20 are monofilament wires. The wires forming the retaining elements 20 are arranged in the base 10 in the form of a “V” and / or a “W”.

[0064] The retaining elements 20 as shown have a shape generally referred to as a mushroom. They each comprise a rod 22 extending from the upper face 12 of the base 10, and a head 26 formed at the free end 24 of the rod 22. The head 26 as shown has the shape of a half-sphere or a portion of a sphere. It is understood that this is a limiting example, and that the retaining elements 20 may have any suitable geometry. The retaining elements 20 could be of other types than mushrooms, for example hooks resulting from injection and / or extrusion and / or harpoons or even could be loops, for example loops formed by weaving, knitting and / or other assembly.

[0065] The device 1 also has an anchoring strip 30, secured to the lower face 14 of the base 10.

[0066] The anchoring strip 30 has a bottom 31 for which an upper face is defined 32 and a lower face 34, the designation being arbitrary, and here chosen in consistency with the designation of the faces of the base 10.

[0067] Loops 35 extend from a face of the bottom 31, these loops being adapted to form anchoring means in a foam material injected against the lower face 14 of the base 10. As will be seen later, the loops 35 extend here from the upper face 32 of the bottom 31.

[0068] The bottom 31 typically has a thickness of between 30 and 1000 pm, or between 50 and 700 pm.

[0069] The loops 35 may extend in a direction perpendicular to the plane formed by the lower face 14 of the base 10, or in a direction not perpendicular to the plane formed by the lower face 14 of the base 10.

[0070] The bottom 31 is typically formed by a knit, for example with one or more threads.

[0071] The anchoring strip 30 may have foot loops, extending projecting from the lower face 34 of the bottom 31 and / or in the plane of the bottom 31. The foot loops typically have maximum dimensions strictly smaller than the loops 35 extending projecting from the upper face 32 of the bottom 31.

[0072] The loops 35, the base 31 and, where appropriate, the foot loops are typically formed by the same threads; there can therefore typically be a continuity of material between the base 31, the loops 35 and, where appropriate, the foot loops.

[0073] The anchoring strip 30 is typically formed from wires having a diameter of between 30 and 600 μm, or between 70 and 550 μm. The use of wires with such a diameter makes it possible to prevent the wires from cutting the material which will then envelop the anchoring strip 30.

[0074] According to one example, the knit has stitches, the loops of which are linked together, for example with a crossing of the feet of adjacent loops or are in contact with each other. Such a structure makes it possible to improve the hold of the loops, which is particularly advantageous for applications in which a damping effect is sought. In addition, this structure makes it possible to give volume to the stitch, and a shape memory effect.

[0075] [Fig. 3] schematically represents an example of arrangement of an anchoring strip 30 on the lower face 14 of the base 10. The loops 35 have not been shown in this figure in order to improve readability. The anchoring strip 30 typically comprises several warp threads, typically each extending in the longitudinal direction MD and several weft threads typically extending in the transverse direction CD, the warp and weft threads being interlaced. The warp and weft threads form anchoring elements which can be positioned regularly or not in the main direction MD and / or the transverse direction CD on the lower face 14 of the base 10. The weft threads provide a connection between the different warp threads. The weft threads typically extend in the transverse direction CD, but may also have a non-zero component in the longitudinal direction MD as shown schematically in [Fig.3]. In [Fig.3], the bottom 31 is represented by bold lines and the base 10 is represented by broken lines.

[0076] As shown schematically in [Fig.2], the anchoring strip 30 is secured to the lower face 14 of the base 10. However, unlike known devices, the anchoring strip 30 is here secured to the lower face 14 of the base 10 by the loops 35. More precisely, a foot and a head are defined for the loops, the foot being linked to the upper face 32 of the bottom 31, and the head forming the end of the loop 35 furthest from the bottom 31. The feet of the loops 35 are typically crossed.

[0077] According to one example, for a loop 35, typically for each loop 35, the two loop portions arranged between the head of the loop and respectively the loop feet extend in a direction not perpendicular to the plane formed by the bottom 31 and / or a direction not perpendicular to the plane comprising the longitudinal direction MD and the transverse direction CD.

[0078] The two loop portions arranged between the loop head and the loop feet respectively may have an identical or different shape. For example, one may have a rectilinear or substantially rectilinear shape and the other may be curved or substantially curved.

[0079] The anchoring strip 30 is here secured to the lower face 14 of the base 10 via the head of the loops 35. Thus, all or part of the heads of all or part of the loops 35 of the anchoring strip 30 is secured to the lower face 14 of the base 10.

[0080] In the example illustrated in [Fig.2], a securing means 40 is shown, for example a layer of adhesive, for securing the loops 35 to the lower face 14 of the base 10. It is understood that this embodiment is not limiting, and that any suitable securing means can be used, for example an adhesive or a glue. The securing means 40 and the base 10 are formed from distinct materials.

[0081] This configuration thus makes it possible to ensure a non-zero spacing between the base 10 and the bottom 31 of the anchoring strip 30. The loops 35 provide a spring or shock absorber effect between the base 10 and the bottom 31.

[0082] According to one example, the bottom 31 of the anchoring strip 30 and the base 10 are spaced apart by a distance of between 0.2 mm and 10 mm, or between 0.5 mm and 5 mm. This spacing here typically corresponds to the distance between the lower face 14 of the base 10 and the upper face 32 of the bottom 31 of the anchoring strip 30.

[0083] According to one example, the heads of the loops 35 are secured to the lower face 14 of the base 10 so as not to protrude from the upper face 12 of the base 10. The loops 35 typically do not pass through the entire base 10. The loops 35 may penetrate partly into the thickness of the base 10, in particular in the case where the base 10 is formed by an entanglement of fibers or threads.

[0084] According to one example, at least 50% of the loops 35 of the anchoring strip 30 are secured to the lower face 14 of the base 30, or typically at least 75% of the loops 35 of the anchoring strip 30 are secured to the lower face 14 of the base 30, or at least 80% of the loops 35 of the anchoring strip 30 are secured to the lower face 14 of the base 30, or at least 90% of the loops 35 of the anchoring strip 30 are secured to the lower face 14 of the base 30 and in one case, 100% of the loops 35 of the anchoring strip 30 are secured to the lower face 14 of the base 30.

[0085] According to one example, at least 1% of the height of the loops 35 is secured to the base 10, or at least 2%, and at most 25%, in particular at most 20% of the height of the loops 35 is secured to the base 10. By secured to the base 10, here is meant the part of a loop 35 which is fixed by an adhesive or glue to the base 10, and is for example enveloped by the adhesive or glue.

[0086] The device as proposed has several advantages. In the case where the device is provided with retaining elements 20, it makes it possible in particular to overcome the problems mentioned in the introduction and linked to the packaging of products in the form of rolls or products directly in a cardboard box after cutting the latter. Indeed, when the product is here packaged in rolls, the retaining elements 20 come into contact with the bottom 31 and not with the loops 35, which thus avoids making a self-gripping connection when packaging in rolls.

[0087] Furthermore, the anchoring properties in a foam material injected against the lower face 14 of the base 10 are retained; the anchoring is ensured by the loops 35 and by the bottom 31. More generally, the device can be associated with a material forming an envelope surrounding at least in part the anchoring strip 30, typically surrounding or enveloping at least in part the loops 35 of the anchoring strip 30 and / or the bottom 31 of the anchoring strip 30. The envelope is typically formed of foam, plaster and / or concrete. More generally, the device as proposed is thus an anchoring device, which can also be a retaining device in the case where the latter has retaining elements 20.

[0088] The device as proposed may also have advantages in different types of applications.

[0089] For example, the device 1 can be used for fixing a covering to a surface, for example a floor or wall covering or for a seat, ty stitching of foam, concrete, plaster or any other element intended to be fixed on a support and which may for example be in the form of a plate. The device is typically overmolded in the material, which forms an envelope surrounding all or part of the anchoring strip 30, typically surrounding all or part of the loops 35 of the anchoring strip 30 and / or all or part of the bottom 31 of the anchoring strip 30. As indicated previously, this total or partial wrapping of the loops 35 and / or the bottom 31 of the anchoring strip 30 makes it possible to ensure anchoring of the device in the material, or vice versa.

[0090] The anchoring strip 30 typically has a structure that can be described as open. The openings are defined as being the open areas between two sets of adjacent warp threads, and between two adjacent weft threads, according to a view in a plane perpendicular to the longitudinal direction MD and to the transverse direction CD, from the lower face 34 of the bottom 31 of the anchoring strip 30. An opening is typically defined as being an area having a surface area of at least 1 mm2 in this plane, or at least 1.5 mm2, or even at least 1.8 mm2.

[0091] According to one example, the anchoring strip 30 has, according to a view in a plane perpendicular to the longitudinal direction MD and to the transverse direction CD, from the lower face 34 of the bottom 31 of the anchoring strip 30, a number of openings of between 5 and 100 openings per cm2, with in particular each opening having a surface area of at least 1.0 mm2 or a number of openings of between 5 and 60 openings per cm2, with in particular each opening having a surface area of at least 1.5 mm2, or a number of openings of between 5 and 50 openings per cm2, with in particular each opening having a surface area of at least 1.8 mm2. An example of an opening of the anchoring strip 30 has been represented by a grid in [Fig.3].According to one example, the anchoring strip 30 has, according to a view in a plane perpendicular to the longitudinal direction MD and to the transverse direction CD, from the lower face 34 of the bottom 31 of the anchoring strip 30, an opening rate of between 50% and 90% per cm2, in particular between 60% and 90% per cm2, more particularly between 70% and 90% per cm2, the opening rate being defined as being the ratio between the surface area of the openings of the bottom 31 relative to the surface area considered.

[0092] Such an open structure of the anchoring strip 30, and more precisely of the bottom 31 of the anchoring strip 30, makes it possible to ensure good penetration of the material, for example of the injected material, and therefore good anchoring of the device in a material such as foam or more generally any other material penetrating into the anchoring strip 30.

[0093] [Fig.4] illustrates such a type of application.

[0094] This figure shows that a coating is secured to the lower face 34 of the base 31, here by means of a layer of adhesive 45. The product thus formed can be assembled on a counterpart fixed to a support such as a wall, a wall, a floor, a ceiling, or a surface of an object.

[0095] The proposed structure which ensures a non-zero spacing between the base 10 and the bottom 31 makes it possible to ensure the formation of an air gap between the base 10 and the bottom 31, and consequently between the base 10 and the covering 50, which thus makes it possible to perform a shock absorber or insulator function.

[0096] Optionally, this damping or insulating effect can be accentuated by superimposing several anchoring strips 30.

[0097] [Fig.5] shows a variant of [Fig.4], in which the device 1 is so lidarized to a support 60. The covering 50 is here secured to a counterpart 54, here a loop counterpart, using a layer of adhesive 52. This counterpart 54 is adapted to form a self-gripping connection with the device 1, by engaging the retaining elements 20.

[0098] We find in this variant the same advantages as in the embodiment illustrated with reference to [Fig.4].

[0099] As a variant of the embodiment shown in [Fig.5], the base 10 can form the coating. [Fig.6] schematically illustrates such a variant.

[0100] In such an embodiment, the base 10 typically does not have retaining elements 20. Such a variant thus exploits the properties of the anchoring strip 30 to form an air gap between the support 60 and the base 10 forming the covering, and therefore perform a thermal insulation and shock absorber function. The base 10 can then comprise a vapor barrier film secured on its lower face 14, or integrated into the base 10.

[0101] In such an embodiment, the proposed device forms a versatile anchoring device, making it possible to perform an insulation function, in particular thermal and / or acoustic and / or mechanical and / or light and / or air and / or humidity insulation, with a simplified and versatile structure for numerous applications.

[0102] Figures 7 and 8 schematically illustrate variants of the embodiment of [Fig.4]. It is understood that similar variants can be made with reference to the embodiment shown in [Fig.5] or in [Fig.6]. As for [Fig.3], in [Fig.8], the bottoms 31 are represented by bold lines and the base 10 is represented by broken lines, and the loops 35 are not shown in this figure in order to improve readability.

[0103] [Fig.7] illustrates the superposition of two anchoring strips 30 according to the same direction, here the longitudinal direction MD. The two anchoring strips are identified by numerical references 30a and 30b, their different elements being identified by the same numerical references already used in figures 2 and 4 and to which we have added the index a or b. An additional adhesive layer 41 secures the anchoring strip 30b to the lower face 34a of the bottom 31a of the anchoring strip 30a. More precisely, the loops 35b of the anchoring strip 30b are here secured to the lower face 34a of the bottom 31a of the anchoring strip 30a by means of the adhesive 41. This configuration makes it possible to maintain the effects mentioned previously with reference in particular to [Fig.2], and in particular to prevent engagement of the retaining elements 20 with the loops of the anchoring strips 30a and 30b.

[0104] The thickness of the air gap between the base 10 and the bottom 31, and consequently between the base 10 and the covering 50 is therefore increased compared to the embodiment shown in FIGS. 4, 5 or 6, which increases the insulation and damping effect.

[0105] It is understood that this embodiment can be generalized for any number of layers of superimposed anchoring strips using a device according to the invention. The different layers of anchoring strips thus formed can for example be formed of anchoring strips 30 aligned and therefore extending in the same direction, so that the anchoring strips of two superimposed layers are thus typically superimposed and aligned with each other. As a variant, the anchoring strips of the different layers thus superimposed can be arranged so as to cross. Thus, it is possible for example to propose a configuration with a first layer formed of anchoring strips extending in the longitudinal direction MD, and a second layer formed of anchoring strips extending in the transverse direction CD.

[0106] [Fig.8] schematically represents another example of superposition of two anchoring strips 30a and 30b. In this example, the anchoring strips 30a which form a first thickness are aligned along the longitudinal direction MD, while the anchoring strips 30b which form a second thickness are aligned along the transverse direction CD.

[0107] In such an application, a vapor barrier film may typically be interposed between the anchoring strips 30 and the covering 50, or where appropriate between two superimposed anchoring strips 30. The vapor barrier film is typically held by two securing means on either side, for example two layers of adhesive or glue on either side of the vapor barrier film.

[0108] Although the present invention has been described with reference to specific exemplary embodiments, it is obvious that modifications and changes may be made to these examples without departing from the general scope of the invention as defined by the claims. In particular, individual features of the various illustrated / mentioned embodiments may be combined in additional embodiments. Therefore, the description and the drawings should be considered in an illustrative rather than restrictive sense.

[0109] It is also obvious that all the characteristics described with reference to a method are transposable, alone or in combination, to a device, and conversely, all the characteristics described with reference to a device are transposable, alone or in combination, to a method.

Claims

Claims

1. Device (1), comprising: - a base (10) extending in a longitudinal direction (MD) and a transverse direction (CD), having an upper face (12) and a lower face (14) opposite the upper face (12), - an anchoring strip (30), comprising * a bottom (31) comprising interlaced warp threads and weft threads, * a plurality of loops (35) extending from the bottom (31), each loop (35) comprising two feet extending from the bottom, and a head forming the end of the loop (35) opposite the feet, characterized in that the device comprises, a securing means (40), securing the anchoring strip (30) to the lower face of the base (10) via at least part of the heads of the loops (35), in particular so as to define a non-zero spacing between the base (10) and the bottom (31) of the anchoring strip (30), and in that the securing means (40) and the base (10) are formed from separate materials,wherein the upper face (12) of the base (10) is provided with retaining elements (20), and wherein each retaining element (20) comprises a rod (22) and a head (26), the rod (22) extending from the upper face (12) of the base (10), and the head (26) being formed at a free end (24) of the rod (22) opposite the upper face (12) of the base (10).,

2. Device (1) according to claim 1, wherein the bottom (31) of the anchoring strip (30) and the base (10) are spaced by a distance of between 0.2 mm and 10 mm, or between 0.5 mm and 5 mm.

3. Device (1) according to one of claims 1 or 2, in which the heads of the loops (35) are secured to the lower face (14) of the base (10) so as not to protrude from the upper face (12) of the base (10).

4. Device (1) according to one of claims 1 to 3, in which at least 50% of the loops (35) of the anchoring strip (30) are secured to the lower face (14) of the base (10), or typically at least 75% of the loops (35) of the anchoring strip (30) are secured to the lower face (14) of the base (10).

5. Device (1) according to one of claims 1 to 4, in which the base (10) is formed from interwoven monofilament and / or multifilament synthetic threads, in particular by weaving and / or knitting.

6. Device (1) according to claim 5, wherein said synthetic threads are made of thermoplastic material.

7. Device according to one of claims 5 or 6, in which the wires have a diameter of between 30 and 600 micrometers, or between 70 and 550 micrometers.

8. Device (1) according to one of claims 1 to 7, in which the bottom (31) of the anchoring strip (30) extends continuously in the longitudinal direction (MD).

9. Device (1) according to one of claims 1 to 8, comprising a plurality of anchoring strips (30) superimposed so as to define several layers of anchoring strips (30) in a direction perpendicular to the lower face (14) of the base (10).

10. Device according to claim 9, in which the anchoring strips (30) of the superimposed layers are secured to each other by means of an adhesive (41).

11. Device (1) according to one of claims 1 to 10, wherein the base (10) is formed from a woven and / or knitted material, the rods (22) of the retaining elements (20) extending at least partly into the woven and / or knitted material of the base (10).

12. Device according to one of claims 1 to 11, in which the securing means is an adhesive or a glue.

13. An assembly which comprises an envelope and a device according to one of claims 1 to 12, wherein the envelope at least partly surrounds the anchoring strip (30), in particular at least partly surrounds the loops (35) of the anchoring strip (30) and / or the bottom (31) of the anchoring strip (30).

14. An assembly according to claim 13, wherein the casing is formed from a foam material and / or plaster and / or concrete and / or a crosslinkable plastic material and / or a thermosetting material.

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