EP4123090A1 - Multi-layer floor equipment, advantageously suitable for practising sports or games - Google Patents

Abstract

Multi-layer floor equipment, advantageously suitable for sporting or recreational practice, comprising:- a lower support layer (2),- an intermediate mattress (3), made of an elastomer material and delimiting at least one sealed chamber (31) intended to be filled with a fluid, - an upper layer (4), suitable for providing an aesthetic and/or technical facing of said multilayer floor equipment (1).

Description

Technical field of the invention

The present invention relates to the technical field of multi-layer floor equipment, advantageously suitable for sports or recreational practice.

State of the art

Ground equipment is essential for certain human activities, for example sports or games.

Some floor equipment includes, for example, a layer made of elastomeric material to provide flexibility during contact with users.

However, most of these ground equipment offer relatively similar experiences and sensations.

In addition, the installation of floor equipment is generally relatively complex.

Presentation of the invention

The present invention proposes a multi-layer ground equipment, advantageously adapted to sporting or playful practice.

• une couche support, inférieure,
• au moins un matelas intercalaire, réalisé dans un matériau élastomère et délimitant au moins une chambre étanche destinée à être remplie avec un fluide,
• une couche supérieure, adaptée à assurer un parement esthétique et/ou technique dudit équipement de sol multicouches.

The multi-layer floor equipment includes:

• a support layer, lower,
• at least one intermediate mattress, made of an elastomeric material and delimiting at least one sealed chamber intended to be filled with a fluid,
• a top layer, suitable for providing an aesthetic and/or technical facing of said multilayer floor equipment.

Such multilayer floor equipment has the advantage of offering an original experience and feeling for users, while ensuring simplicity of installation.

In particular, the intermediate mattress, inserted between the support layer and the upper layer, allows stability exercises (fun and/or sports) for the users while ensuring safety of use.

• ledit matelas intercalaire comporte une bande hermétique délimitant ladite au moins une chambre étanche, laquelle bande hermétique comporte au moins un tronçon fermé hermétiquement par une soudure et/ou une paire de profilés pinçant ledit tronçon ;
• ledit matelas intercalaire comporte une bande périphérique qui est solidarisée avec la couche support (avantageusement par l'intermédiaire d'un profilé rapporté par des organes traversants) ;
• ledit matelas intercalaire présente un contour carré ou rectangulaire, présentant avantageusement les dimensions suivantes : une largeur de 1 à 2 m et une longueur de 1 à 10 m ;
• la surface du matelas intercalaire est inférieure par rapport à la surface de la couche support et par rapport à la surface de la couche supérieure ;
• la couche support est réalisée en matériau plastique ou en film géotextile ; de préférence, la couche support est formée de plaques juxtaposées, avantageusement assemblées par des moyens d'assemblage, avantageusement des moyens d'assemblage par emboîtement ;
• la couche supérieure consiste en un gazon synthétique ;
• ledit équipement de sol multicouches comprend encore au moins une couche élastique, pleine et réalisée en matériau élastomère, avantageusement des granules de caoutchouc agglomérés ; ladite au moins une couche élastique est avantageusement disposée sus-jacente, ou sous-jacent, ou autour, dudit matelas intercalaire ; ladite au moins une couche élastique présente des caractéristiques suivantes : une épaisseur allant de 10 à 50 mm, une masse volumique allant de 400 à 1 000 kg/m3, une dureté Shore A allant de 45 à 70 ;
• la couche supérieure comporte au moins un relief, par exemple en forme d'anneau, qui est sus-jacent de ladite au moins une chambre étanche et qui présente avantageusement une hauteur allant de 10 à 100 mm, de préférence de 10 à 50 mm ; de préférence, ledit au moins un matelas intercalaire comporte une peau supérieure qui définit ladite au moins une chambre étanche et qui est sous-jacente de la couche supérieure, et ledit équipement de sol multicouches comporte au moins un insert qui est intercalé entre ladite peau supérieure et ladite couche supérieure pour former ledit au moins un relief, lequel au moins un insert est avantageusement rapporté ou réalisé monobloc avec ladite peau supérieure.

Other non-limiting and advantageous characteristics of the product in accordance with the invention, taken individually or according to all the technically possible combinations, are the following:

• said intermediate mattress comprises an airtight band delimiting said at least one airtight chamber, which airtight band comprises at least one section hermetically sealed by a weld and/or a pair of sections pinching said section;
• said intermediate mattress comprises a peripheral strip which is secured to the support layer (advantageously by means of a profile added by through-members);
• said intermediate mattress has a square or rectangular outline, advantageously having the following dimensions: a width of 1 to 2 m and a length of 1 to 10 m;
• the surface of the intermediate mattress is lower relative to the surface of the support layer and relative to the surface of the upper layer;
• the support layer is made of plastic material or geotextile film; preferably, the support layer is formed of juxtaposed plates, advantageously assembled by assembly means, advantageously assembly means by interlocking;
• the top layer consists of synthetic turf;
• said multilayer floor equipment further comprises at least one elastic layer, solid and made of elastomeric material, advantageously agglomerated rubber granules; said at least one elastic layer is advantageously arranged overlying, or underlying, or around, said intermediate mattress; said at least one elastic layer has the following characteristics: a thickness ranging from 10 to 50 mm, a density ranging from 400 to 1000 kg/m3, a Shore A hardness ranging from 45 to 70;
• the upper layer comprises at least one relief, for example in the form of a ring, which is overlying said at least one sealed chamber and which advantageously has a height ranging from 10 to 100 mm, preferably from 10 to 50 mm; preferably, said at least one interlayer mattress comprises an upper skin which defines said at least one waterproof chamber and which underlies the upper layer, and said multilayer floor equipment comprises at least one insert which is interposed between said upper skin and said upper layer to form said at least one relief, which at least one insert is advantageously attached or made in one piece with said upper skin.

Of course, the different characteristics, variants and embodiments of the invention can be associated with each other in various combinations insofar as they are not incompatible or exclusive of each other.

Detailed description of the invention

• [Fig. 1] est une vue générale et en perspective de l'équipement de sol multicouches selon l'invention ;
• [Fig. 2] est une vue schématique et en coupe d'un premier mode de réalisation d'un équipement de sol multicouches selon l'invention ;
• [Fig. 3] est une vue schématique et en coupe d'un second mode de réalisation d'un équipement de sol multicouches selon l'invention ;
• [Fig. 4] est une vue générale et en perspective d'une variante de l'équipement de sol multicouches selon l'invention, dont la couche supérieure comporte des reliefs ;
• [Fig. 5] est une vue schématique et en coupe de la variante d'équipement de sol multicouches selon la figure 4, dont le plan de coupe passe par des reliefs.

In addition, various other characteristics of the invention emerge from the appended description made with reference to the drawings which illustrate non-limiting forms of embodiment of the invention and where:

• [ Fig. 1 ] is a general perspective view of the multilayer floor equipment according to the invention;
• [ Fig. 2 ] is a schematic sectional view of a first embodiment of a multilayer floor equipment according to the invention;
• [ Fig. 3 ] is a schematic sectional view of a second embodiment of a multilayer floor equipment according to the invention;
• [ Fig. 4 ] is a general view in perspective of a variant of the multilayer floor equipment according to the invention, the upper layer of which comprises reliefs;
• [ Fig. 5 ] is a schematic cross-sectional view of the variant of multilayer floor equipment according to the figure 4 , whose cutting plane passes through reliefs.

It should be noted that, in these figures, the structural and/or functional elements common to the different variants may have the same references.

The present invention thus relates to a multilayer ground equipment 1, advantageously adapted to the practice of sport or play.

The multilayer floor equipment 1 is advantageously intended to be attached to a floor S (advantageously horizontal), for example within a play area for children or a sports practice area.

A multilayer floor equipment 1 according to the invention is advantageously suitable for outdoor use (outdoor ground), resistant to the surrounding climatic conditions.

The users are intended to evolve, preferably on foot, on the multilayer ground equipment 1.

• une couche support 2, inférieure,
• au moins un matelas intercalaire 3,
• une couche supérieure 4, adaptée à assurer un parement esthétique et/ou technique dudit équipement de sol multicouches 1.

The multilayer floor equipment 1 comprises a superposition of layers, namely at least:

• a support layer 2, lower,
• at least one interlayer mattress 3,
• an upper layer 4, adapted to provide an aesthetic and/or technical facing of said multilayer floor equipment 1.

Support layer

The support layer 2 advantageously forms an interface between the ground S and the overlying layers 3, 4.

The support layer 2 advantageously makes it possible to protect the overlying layers 3, 4 with regard to degradation by contact with the ground S. It also advantageously makes it possible to generate a flat reception surface for the overlying layers 3, 4.

• une face inférieure 2a, destinée à être orientée vers le sol S, voire à prendre appui sur le sol S, et
• une face supérieure 2b, destinée à servir de surface d'appui pour au moins une couche sus-jacente.

The support layer 2 advantageously comprises two opposite faces (defining its thickness), advantageously parallel to each other, namely:

• a lower face 2a, intended to be oriented towards the ground S, or even to rest on the ground S, and
• an upper face 2b, intended to serve as a bearing surface for at least one overlying layer.

The support layer 2 is advantageously made of plastic material or geotextile film.

In the case of a plastic material, the support layer 2 is advantageously formed of juxtaposed plates 21, for example parallelepiped plates, preferably made of plastic material.

Preferably, the plates 21 have sides ranging from 250 mm to 600 mm (preferably for a square plate or a rectangular plate).

The plates 21 are advantageously assembled by assembly means (not shown), advantageously assembly means by interlocking (preferably one-piece).

The interlocking assembly means consist for example of tenon/mortise pairs, for example dovetail.

The tenon/mortise couples advantageously equip the outline of the plates 21 so that two juxtaposed plates 21 are assembled/locked together by interlocking.

The assembly of these plates 21 is advantageously locked by connecting pieces which are secured between two adjoining plates 21.

The support layer 2 advantageously has a height (also called thickness) ranging from 10 to 100 mm, preferably from 10 to 80 mm, preferably from 10 to 25 mm.

Alternatively or additionally, the support layer 2 is advantageously in the form of a geotextile layer.

The geotextile layer is advantageously chosen from woven products and nonwoven products, advantageously made of synthetic material.

In general, the support layer 2 is advantageously secured to the ground S by means of anchoring members (not shown) which pass through the support layer 2 and which are sunk/anchored in the ground S.

Interlayer mattress

The intermediate mattress 3 is made of an elastomeric material and delimits at least one sealed chamber 31 intended to be filled with a fluid.

The intermediate mattress 3 is in particular adapted to deform during the progression of at least one individual, while resisting the forces applied during this progression.

In general, the intermediate mattress 3 is added / implanted between the support layer 2 and the upper layer 4.

• une largeur de 1 à 2 m, et
• une longueur de 1 à 10 m.

In general, the intermediate mattress 3 advantageously has a square or rectangular outline, advantageously having the following dimensions:

• a width of 1 to 2 m, and
• a length of 1 to 10 m.

Also generally, this intermediate mattress 3 is advantageously made in one piece from the elastomeric material.

• les matériaux élastomères, à savoir par exemple le caoutchouc naturel, le caoutchouc « naturel synthétique » (ou poly-isoprène synthétique), le polybutadiène ou le styrène-butadiène, ou
• les matériaux plastiques ou élastomères thermoplastiques (TPE), à savoir par exemple le PVB (polyvinyle de butyral), ABS (acrylonitrile butadiène styrène) / SBR (styrène-butadiène), PP (polypropylène) / EPDM (éthylène-propylène-diène monomère), TPU (TPE de polyuréthane).

This intermediate mattress 3 is made of at least one material capable of undergoing elastic deformation, also called "elastic material", chosen from:

• elastomeric materials, namely for example natural rubber, "synthetic natural" rubber (or synthetic poly-isoprene), polybutadiene or styrene-butadiene, or
• plastic materials or thermoplastic elastomers (TPE), namely for example PVB (polyvinyl butyral), ABS (acrylonitrile butadiene styrene) / SBR (styrene-butadiene), PP (polypropylene) / EPDM (ethylene-propylene-diene monomer) , TPU (Polyurethane TPE).

This intermediate mattress 3 is advantageously made in one piece, either mono-material (in a single material), or multi-material (with at least two superimposed sub-layers made in different materials).

The intermediate mattress 3 may also contain reinforcement sub-layers chosen from textile fibers, metal fibers or any other product providing stability and/or resistance to elongation.

These reinforcement sub-layers consist for example of a textile reinforcement serving as reinforcement, advantageously made of a material chosen from among nylon, cotton, polyester, polyamide or any other textile reinforcement.

Said at least one sealed chamber 31 is intended to be filled with a fluid, for example a liquid (water for example) or a gas (air for example).

This intermediate mattress 3 comprises for this a filling valve (not shown) in fluid communication between the sealed chamber 31 and the outside.

• une peau inférieure 3a, ménagée du côté de la couche support 2, et
• une peau supérieure 3b, ménagée du côté de la couche supérieure 4.

The intermediate mattress 3 advantageously comprises skins 3a, 3b defining said at least one sealed chamber 31:

• a lower skin 3a, arranged on the support layer 2 side, and
• an upper skin 3b, arranged on the side of the upper layer 4.

Once said at least one sealed chamber 31 has been filled, the intermediate mattress 3 advantageously has a generally parallelepipedal shape or a convex domed shape or a spherical cap shape.

Once said at least one sealed chamber 31 has been filled, said at least one sealed chamber 31 has been filled and has a thickness ranging from 10 to 100 mm, preferably from 30 to 100 mm.

In general and as represented on the figures 2 and 3 , the intermediate mattress 3 comprises an airtight band 32 delimiting said at least one airtight chamber 31.

The hermetic strip 32 comprises at least one section 321 hermetically closed by a weld (shown on the figures 2 and 3 ) and/or by a pair of profiles which pinch this section (not shown).

Preferably, the sections have complementary shapes and are connected by connecting members which pass through the section 321.

• deux tronçons longitudinaux, avantageusement fermés hermétiquement par une soudure, et
• deux tronçons transversaux, avantageusement fermés hermétiquement par une soudure ou une paire de profilés.

Preferably, the hermetic strip 32 has the shape of a frame which comprises several sections 321:

• two longitudinal sections, advantageously hermetically sealed by a weld, and
• two transverse sections, advantageously hermetically sealed by a weld or a pair of profiles.

The implementation of closure means by "profiles" allows a custom adjustment of the length of the intermediate mattress 3 and its sealed chamber 31.

Still generally, the intermediate mattress 3 comprises a peripheral strip 33 which is secured to the support layer 2, advantageously by means of a section 6 attached by through-members 7.

The peripheral strip 33 is thus pinched between the profile 6 and an underlying layer.

The traversing members 7 pass through the section 6 and the peripheral band 33, so as to be anchored advantageously in the support layer 2.

The peripheral strip 33 advantageously has a width ranging from 100 to 200 mm.

In this case, the hermetic band 32 and the peripheral band 33 are combined or form the same structure.

In other words, the peripheral strip 33 here forms the hermetic strip 32 delimiting the sealed chamber 31.

Still in general, the surface of the intermediate mattress 3 is advantageously lower relative to the surface of the support layer 2 and relative to the surface of the upper layer 4.

This feature makes it possible to maintain a peripheral space 1a, or sidewalk, which is firmer around the intermediate mattress 3 ( figure 1 ), useful in particular in terms of safety in the event of the user falling (advantageously critical fall height for children's games).

Preferably, this peripheral space 1a has for example a width ranging from 1 to 1.5 m.

top layer

The upper layer 4, advantageously forming a wear layer, is aesthetically and/or technically adapted to the intended application.

The upper layer 4 advantageously covers the multilayer floor equipment 1, and in particular the intermediate mattress 3.

The upper layer 4 is for example chosen from synthetic turf, conventional in itself.

By “synthetic turf” (also called “synthetic turf” or “artificial turf” or even “artificial turf”) is advantageously meant a surface imitating natural turf.

Such synthetic turf advantageously comprises strands of plastic (imitating turf) which are attached to a support (woven or non-woven) provided with drainage holes.

• un premier aspect dans une zone sus-jacente du matelas intercalaire 3, et
• un second aspect dans une zone entourant ledit matelas intercalaire 3.

The upper layer 4 can comprise two different aspects:

• a first aspect in an overlying area of the interlayer pad 3, and
• a second aspect in an area surrounding said interlayer mattress 3.

Still generally, the upper layer 4 is advantageously secured to the support layer 2, preferably by means of sections 41 which are attached by through members 42.

The upper layer 4 is thus pinched between the profiles 41 and an underlying layer.

The crossing members 42 advantageously cross the sections 41 and the upper layer 4, so as to be anchored in the support layer 2.

In general, the peripheral contour of this upper layer 4 advantageously corresponds to the peripheral contour of the support layer 2.

Elastic layer

As illustrated in the figures, the multilayer floor equipment 1 also advantageously comprises at least one elastic layer 8 (or plate), solid and made of elastomeric material.

The elastic layer 8 advantageously comprises agglomerated rubber granules.

The rubber granules are advantageously derived from a recycling operation (for example tires).

• vulcanisation, et/ou
• polymérisation, avantageusement au moyen de résine polyuréthane, de latex ou tout autre liant polymère.

The rubber granules are advantageously secured together by:

• vulcanization, and/or
• polymerization, advantageously by means of polyurethane resin, latex or any other polymer binder.

• une épaisseur allant de 10 à 50 mm, et/ou
• une masse volumique allant de 400 à 1 000 kg / m³, et/ou
• une dureté Shore A allant de 45 à 70.

In general, the elastic layer 3 has characteristics chosen from:

• a thickness ranging from 10 to 50 mm, and/or
• a density ranging from 400 to 1,000 kg/m ³ , and/or
• a Shore A hardness ranging from 45 to 70.

• une couche élastique 8 sus-jacente du matelas intercalaire 3 (figure 3), ou
• une couche élastique 8 sous-jacent du matelas intercalaire 3 (figure 2), ou
• une couche élastique 8 autour du matelas intercalaire 3 (non représenté).

Said at least one elastic layer 8 can advantageously have various arrangements with respect to the intermediate mattress 3 within the multilayer floor equipment 1, namely for example:

• an elastic layer 8 overlying the intermediate mattress 3 ( figure 3 ), Where
• an elastic layer 8 underlying the intermediate mattress 3 ( figure 2 ), Where
• an elastic layer 8 around the intermediate mattress 3 (not shown).

In the “overlying” arrangement, the overlying elastic layer 8 is advantageously interposed between the intermediate mattress 3 and the upper layer 4; this elastic layer 8 is also advantageously interposed between the support layer 2 and the upper layer 4.

In the “underlying” arrangement, the underlying elastic layer 8 is advantageously interposed between the support layer 2 and the intermediate mattress 3; this elastic layer 8 is also advantageously interposed between the support layer 2 and the upper layer 4.

In the “around” arrangement, the elastic layer 8 advantageously comprises a housing in which the intermediate mattress 3 is added; this elastic layer 8 is also interposed between the support layer 2 and the upper layer 4.

In general, the elastic layer 8 is advantageously parallelepipedal. The peripheral contour of this elastic layer 8 advantageously corresponds to the peripheral contour of the support layer 2 and of the upper layer 4.

Top layer with at least one relief

According to an embodiment illustrated in the figures 4 and 5 , the upper layer 4 may optionally comprise at least one relief 9.

Such a relief 9 thus advantageously forms a projecting shape at the level of the upper layer 4.

The upper layer 4 can then include a visual, or a marking, intended to highlight or signal said at least one relief 9.

A relief 9 can take any desired shape, for example a ring shape or a beam/spar shape.

• un diamètre intérieur allant de 40 à 60 cm, et
• une épaisseur radiale (entre le rayon intérieur et le rayon extérieur) allant de 10 à 20 cm.

Such a ring-shaped relief 9 has for example:

• an inside diameter ranging from 40 to 60 cm, and
• a radial thickness (between the inner radius and the outer radius) ranging from 10 to 20 cm.

Such a relief 9 in the form of a ring is for example interesting for introducing a foot of the user.

The upper layer 4 may comprise several reliefs 9 which are arranged in a fashion (in pairs, in staggered rows, randomly, etc.) to form, for example, a course of motor skills.

This relief 9 is overlying said at least one sealed chamber 31 of said at least one intermediate mattress 3.

This relief 9 advantageously has a height ranging from 10 to 100 mm, preferably from 10 to 50 mm.

As shown on the figure 5 , the upper skin 3b is advantageously underlying the upper layer 4.

And the multilayer floor equipment 1 advantageously comprises at least one insert 91 which is inserted between this upper skin 3b and the upper layer 4 to form said at least one relief 4.

The upper layer 4 then advantageously hugs the upper skin 3b and said at least one insert 91.

• ledit au moins un insert 91 est rapporté entre la peau supérieure 3b et la couche supérieure 4,
• ledit au moins un insert 91 peut être réalisé monobloc avec la peau supérieure 3b dudit au moins un matelas intercalaire 3 (par exemple moulé directement dans la matière de la peau supérieure 3b).

Said at least one insert 91 can advantageously take different forms, namely among:

• said at least one insert 91 is added between the upper skin 3b and the upper layer 4,
• said at least one insert 91 can be made in one piece with the upper skin 3b of said at least one intermediate pad 3 (for example molded directly into the material of the upper skin 3b).

Installation of multilayer flooring equipment

Preferably, the layers are advantageously laid successively on a floor S to be covered to together form the multilayer floor equipment 1 according to the invention.

In particular, the support layer 2 is advantageously placed on the ground S then the successive layers are then attached to, and secured with, this support layer 2.

At least one user can then circulate, preferably on foot, on the multilayer floor equipment 1 according to the invention.

In particular, the path above the intermediate mattress 3 provides original sensations, advantageously reinforced by transitions between the intermediate mattress 3 and the peripheral space 1a.

If necessary, said at least one relief 9 reinforces the playful and/or sporty aspect, during the practice of the user.

Of course, various other modifications may be made to the invention within the scope of the appended claims.

Claims (15)

Multilayer floor equipment, advantageously suitable for sports or recreational practice, which multilayer floor equipment (1) comprises: - a support layer (2), lower, - at least one intermediate mattress (3), made of an elastomeric material and delimiting at least one sealed chamber (31) intended to be filled with a fluid, - an upper layer (4), adapted to provide an aesthetic and/or technical facing of said multilayer floor equipment (1). Multilayer floor equipment, according to claim 1, characterized in that said intermediate mattress (3) comprises an airtight band (32) delimiting said at least one airtight chamber (31),
which hermetic band (32) comprises at least one section (321) sealed by: - a weld, and/or - a pair of profiles which hermetically clamps said section (321). Multilayer floor equipment, according to any one of Claims 1 or 2, characterized in that the said intermediate mattress (3) comprises a peripheral band (33) which is secured to the support layer (2). Multilayer floor equipment, according to any one of claims 1 to 3, characterized in that said intermediate mattress (3) has a square or rectangular outline, advantageously having the following dimensions: - a width of 1 to 2 m, and - a length of 1 to 10 m. Multilayer floor equipment, according to any one of Claims 1 to 4, characterized in that the surface of the intermediate mattress (3) is lower than the surface of the support layer (2) and compared to the surface of the upper layer (4). Multilayer ground equipment, according to any one of Claims 1 to 5, characterized in that the support layer (2) is made of plastic material or of geotextile film. Multilayer floor equipment, according to claim 6, characterized in that the support layer (2) is formed of juxtaposed plates (21), advantageously assembled by assembly means, advantageously assembly means by interlocking. Multi-layer ground equipment, according to any one of Claims 1 to 7, characterized in that the upper layer (4) consists of synthetic turf. Multilayer floor equipment, according to any one of Claims 1 to 8, characterized in that the said multilayer floor equipment (1) further comprises at least one elastic layer (8), solid and made of elastomeric material, advantageously granules of agglomerated rubber. Multilayer floor equipment, according to Claim 9, characterized in that the said at least one elastic layer (8) is arranged: - overlying, or - underlying, or - around, said intermediate mattress (3). Multilayer floor equipment, according to any one of claims 9 or 10, characterized in that said at least one elastic layer (8) has the following characteristics: - a thickness ranging from 10 to 50 mm, - a density ranging from 400 to 1,000 kg/m3, - a Shore A hardness ranging from 45 to 70. Multilayer floor equipment, according to any one of Claims 1 to 11, characterized in that the upper layer (4) comprises at least one relief (9) which is overlying the said at least one sealed chamber (31). Multilayer floor equipment, according to Claim 12, characterized in that the said at least one intermediate mattress (3) comprises an upper skin (3b) which defines the said at least one sealed chamber (31) and which underlies the layer upper (4),
in that said multilayer floor equipment (1) comprises at least one insert (91) which is interposed between said upper skin (3b) and said upper layer (4) to form said at least one relief (9). Multilayer floor equipment, according to claim 13, characterized in that said at least one insert (91) is: - reported, or - Made in one piece with said upper skin (3b). Multilayer floor equipment, according to any one of Claims 12 to 14, characterized in that the said at least one relief (9) has a height ranging from 10 to 100 mm, preferably from 10 to 50 mm.

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