EP0641903A1 - Sectional false floor - Google Patents

Abstract

The false floor of the invention exhibits a multiplicity of floor panels (1, 5), which are mounted, in each case in the region of their corners, by means of supports (3) on a firm underlying surface, a cavity being formed between the underside of the floor panels (1, 5) and the underlying surface. In this arrangement, the floor panels (1, 5) are provided in an alternating manner, like the pattern of a chessboard, as lower panels (1) and upper panels (5), the lower panels (1) exhibiting, on their side directed towards the underlying surface, a shoulder (8) which runs around them in a continuous or interrupted manner, juts out like a flange essentially in the panel plane and onto which the upper panels (5) can be laid. Consequently, the gap or the separation joint between the individual panels are covered in the direction of the cavity, as a result of which the degree of fire protection is improved. <IMAGE>

Description

The invention relates to a raised floor with a multiplicity of base plates, each of which is supported in the region of its corners by means of supports on a solid base, a cavity being formed between the underside of the base plates and the base, according to the preamble of patent claim 1.

In the known generic double floors, all plates are essentially the same. The boards usually consist of a particle board or a metal tub filled with anhydrite. Four of these plates each meet at their corners in the area of the support surfaces on the supports and two of these plates each meet in the area of their edges. This results in a continuous gap running in the edge area between each two adjacent panels, the width of which is determined primarily by the manufacturing accuracy of the panels and secondarily by the tolerances that are necessarily accepted when laying the raised floor. In order to keep the tolerances during installation as low as possible and to facilitate installation, the edge surfaces of the plates are usually bevelled so that a gap with a V-shaped cross-section is open towards the bottom, while the plates are closed as evenly as possible Surface in the area of their upper edges touching each other directly.

With regard to the laying accuracy and thus the aesthetic quality, especially of a closed surface the well-known raised floors are quite satisfactory. A disadvantage of both the use of chipboard and the use of tubs filled with anhydrite is, above all, that due to the continuous V-shaped gap from the surface of the floor to the subsurface, the requirements for adequate fire safety cannot be met, since in the event of a fire in the cavity between the raised floor and the subsurface, even if the panels are sufficiently fire-proof, the fire and the flue gases can pass through the gap after a short time.

Another disadvantage of the known raised floors is that there is no mechanical support precisely in the area of the heaviest load, namely in the area of the edges, so that the plates have to be designed for this weakest point. This means that all floor panels must be appropriately dimensioned and / or made from a high-strength material, for example highly compressed particle board. This significantly increases the cost of production.

Based on this prior art, it is the object of the present invention to provide a raised floor of the type mentioned at the outset, which has increased fire safety and is inexpensive and easy to manufacture.

This object is achieved by a raised floor according to the teaching of claim 1.

Advantageous embodiments of the invention are the subject of the dependent claims.

According to the invention, the base plates are designed alternately in the manner of a checkerboard pattern as base plates and top plates, the base plates having a closed or interrupted circumferential flange-like shoulder projecting essentially in the plate plane on their side facing the surface. The edge area of the lower plate therefore essentially has a cross section in the area of the shoulder L-shaped shape. The top panels with their edge areas can then be placed on this shoulder.

This means that, according to the invention, the gap between two adjacent plates no longer extends linearly from the floor surface to the substrate or to the cavity under the raised floor, but is covered down to the cavity by the flange-like heel of the base plate. In the event of a fire below the raised floor, on the one hand, the fire is reliably prevented from penetrating through the gap or at least significantly delayed in comparison with the prior art, and on the other hand a seal against flue gases which is significantly improved compared to the prior art is achieved.

Especially when the cavity located under the raised floor is used for ventilation or air guidance, for example in cooperation with a room air conditioning system, the sealing of the joints between the floor panels plays a decisive role. In this application, too, the leak rate, that is to say the air escaping through the separating joints, in the double floor of the invention is considerably reduced by covering the gap in comparison with the known floors. This seal can be further improved, for example, by providing appropriate sealing means on the shoulders in the contact area of the top plates.

Another advantage of the double floor of the invention is that the mechanical strength of both the lower plates and the upper plates and thus the entire double floor in the area of the edges is considerably improved, since on the one hand the lower plates are stiffened even in the edge area by the L-shaped edge profile and on the other hand the top plates are no longer supported only in the area of the corners, but lie essentially over the entire length of the edge on the flange-like heel of the bottom plates. This allows the use of thinner panels and / or panels made of a material of lower strength, which can significantly reduce the manufacturing costs of the raised floor.

In order to further improve, in particular, the fire protection properties of the raised floor, according to one exemplary embodiment of the invention, the lower plates consist of fire-retardant or fire-resistant material at least in the area of the heel, i.e. in the area of the area critical to fire protection, or at least in this area have a fire-retardant or fire-resistant material Coating on. Of course, fire-retardant or fireproofing of the entire underside of the lower and / or upper plate facing the cavity is also entirely possible.

The flange-like shoulder formed or arranged on the lower plate can, for example, be integrally formed on the lower plate, for example by milling the area of the lower plate located above the shoulder. According to an embodiment of the invention, however, the lower plate has a closed or interrupted peripheral frame, in particular profile frame, on its underside, which protrudes at least in regions on the peripheral sides of the lower plate and thus forms the shoulder. The frame can consist of the same material as the lower plate and is positively and / or non-positively, for example by gluing or stapling, connected to the underside of the lower plate.

According to a further exemplary embodiment of the invention, the lower plate is provided on its underside with a sheet metal which completely or partially covers the underside, as a result of which the fire protection properties in particular are considerably improved. On the circumferential sides or edges of the lower plate, the sheet metal protrudes above it and is bent in this area to an open, for example downwardly open to the cavity U-shaped, or closed, for example rectangular, square or triangular shaped rigid profile. This profile forms the shoulder for receiving the top plates and for covering the gap or the separating joint between adjacent plates.

According to a particularly preferred embodiment of the invention, a further possibility of producing the shoulder on the lower plate is that the lower plates are made in two parts. Each base plate has a base plate, which is connected essentially concentrically on its underside to a second plate, the second plate being larger than the base plate. "Concentric" in this context means that both plates are essentially complementary to one another and arranged in such a way that the second plate on the peripheral sides or edges of the base plate protrudes substantially uniformly on all sides thereof and thus forms the circumferential shoulder.

In this exemplary embodiment, the top plate and the base plate of the bottom plate are preferably of essentially the same design, that is to say in particular with the same dimensions and made of the same material. This results in a particularly simple and cost-effective production of the base plates due to the number of different basic structural elements limited to the absolutely necessary minimum and thus the tools and devices necessary for the production.

The second plate can be made of the same material as the base plate of the lower plate. However, at least the second plate of the lower plate preferably consists entirely of a fire-retardant or refractory material, in particular gypsum fiber material. This significantly improves fire safety not only in the area of the heel and thus the gap or the separating joint between two adjacent panels, but in the area of the entire area of the lower panel.

The connection of the base plate and the lower plate can in principle be made by any joining method, as long as a mutual slipping or shifting of the two plates against each other is reliably excluded. The base plate and the second plate of the lower plate are preferably connected in a form-fitting manner, in particular by nailing, stapling or the like, or in a force-fitting manner. especially by gluing or a combination of these joining processes.

In order to further improve, in particular, the impact sound and / or thermal insulation of the double floor according to the invention, it is provided according to a further exemplary embodiment that a structure-borne sound and / or temperature-insulating material, preferably in the form of a thermoplastic film, is introduced between the base plate of the lower plate and the second plate , that is in particular inserted or glued.

Another way to improve the impact sound insulation of the raised floor of the invention is to arrange a damper element between the plate of the supports and the floor panels in the area of the bearing surfaces of the floor panels, especially the base panels on the supports arranged at the corner points of the floor panels. For this purpose, either the surfaces of the support plates of the supports that support the base plates or the surface areas of the base plates lying opposite them are provided with a structure-borne sound-insulating covering or damping element, for example in the form of a separately manufactured insert, in particular made of an elastomer, for example rubber.

When using such damping coverings or damping elements, they preferably have nubs or stop and / or centering elements projecting downward from their main plane in the area in which no lower plates lie directly, or in the case of a damping covering on the underside of the base plates. These knobs or stop and / or centering elements are designed in such a way that the top plates, supported by rubber, can be supported directly on the supports in addition to being supported on the flange-like heel of the bottom plates, with the base plates being fixed in the raised floor level simultaneously or alternatively by the radial surfaces of these elements he follows. This in particular facilitates the assembly of the raised floor according to the invention.

A further ease of assembly can be achieved according to a further embodiment of the invention in that the lateral peripheral or edge surfaces of the base plates are beveled at least slightly wedge-shaped towards the ground in a manner known per se, so that there is a downward between each two adjacent base plates V-shaped opening gap results. This facilitates the insertion of the top plates into the free fields between four finished or assembled bottom plates.

In order to achieve a closed surface without visible parting lines in a fully assembled double floor according to the invention, the heel in the area of the corners of the lower plate is preferably bevelled substantially diagonally with respect to the plane of the plate, so that the lower plates or the base plates of the lower plates in Touch the area of the corners of the shoulder to each other or lie opposite each other with a small distance, the corners of the plates facing each other in the upper edge area of the adjacent sub-plates lying directly against one another.

The top plates preferably have such a shape and size that there is an essentially closed, flat surface of the raised floor in each case with the top plates inserted between the immediately adjacent bottom plates.

The lower plates can be placed loosely on the supports or the plates of the supports. However, in particular if movements of the subsurface, for example due to slight earthquakes or twists, cannot be ruled out, according to one exemplary embodiment of the invention, the sub-plates are attached to the supports and / or the supports on the subsurface in a positive and / or non-positive manner, for example by gluing, screwing , Stapling or the like. In principle, the top plates can be attached to the shoulders of the bottom plates.

In order to ensure access to the cavity after laying, for example for laying cables in the cavity between the raised floor and the subsurface, at least the top plates can be removed individually from the bottom plates, so that at least the gaps between each four bottom plates are freely accessible from above.

Fig. 1

in schematischer perspektivischer Darstellung ein Ausführungsbeispiel eines erfindungsgemäßen Doppelbodenaufbaus;

Fig. 2

ebenfalls in schematischer perspektivischer und vergrösserter Darstellung einen Ausschnitt aus der Darstellung nach Fig. 1;

Fig. 3

in schematischer vergrösserter Teildarstellung ein weiteres Ausführungsbeispiel entsprechend der Darstellung nach Fig. 2;

Fig. 4

in schematischer Ansicht von oben in teilweise gebrochener Darstellung einen Ausschnitt eines erfindungsgemäßen Doppelbodens;

Fig. 5

in vergrösserter Darstellung einen Schnitt entlang der Schnittlinie B-B nach Fig. 4; und

Fig. 6

in vergrösserter Darstellung einen Schnitt entlang der Schnittlinie A-A nach Fig. 4.

The invention is explained in more detail below with reference to drawings which show exemplary embodiments only. It shows

Fig. 1

a schematic perspective representation of an embodiment of a double floor structure according to the invention;

Fig. 2

likewise in a schematic perspective and enlarged representation, a section of the representation according to FIG. 1;

Fig. 3

a schematic enlarged partial representation of another embodiment corresponding to the representation of FIG. 2;

Fig. 4

a schematic view from above in a partially broken representation of a section of a double floor according to the invention;

Fig. 5

an enlarged view of a section along the section line BB of FIG. 4; and

Fig. 6

4 shows an enlarged section along the section line AA according to FIG. 4.

The section shown in Fig. 1 from a double floor structure according to the invention has a number of vertically adjustable supports 3, which are regularly arranged on a solid surface so that they form the corner points of a square grid. On the plates 4 of these supports 3 there are square base plates 1 with their corners 2 so that they abut each other diagonally in the area of their corners 2.

Between each four sub-plates 1, of which only two are shown for reasons of clarity, an upper plate 5 is arranged in such a way that an overall checkerboard-like pattern of upper plates 5 and lower plates 1 results with a closed and flat surface.

As can be seen in particular from the illustration according to FIG. 2, the lower plates 1 are designed in two parts and consist of a base plate 6 which is glued to a second plate 7 on its underside, that is to say toward the cavity under the raised floor side.

The second plate 7 is, like the base plate 6, square, but the second plate 7 has a greater edge length than the base plate 6 and thus a larger area. The two plates 6, 7 are arranged concentrically to one another, so that the second plate 7 protrudes evenly over the edges of the base plate 6 in the region of all edges, which results in a flange-like, closed, circumferential shoulder 8 with an L-shaped cross section. As can be seen in FIG. 1, the top plates 5 are placed on this shoulder 8 to form the raised floor, the thickness of the top plates 5 corresponding exactly to the thickness of the base plates 6.

In the area of their corners 2, the second plates 7 of the sub-plates 1 are diagonally beveled in such a way that when the beveled edge regions 9 of the second plates 7 lie against or against one another in the assembled state, the upper corner or edge points 10 just touch ( Fig. 1 and Fig. 5).

Furthermore, all edges of both the lower plates 1 or the base plates 6 and the upper plates 5 have a wedge-shaped bevel 11, so that, as can be seen in particular in FIGS. 5 and 6, a downward V -shaped opening gap or a parting line 12 results. According to the invention, however, this parting line 12 is completely covered by the shoulder 8 in the area of the edges and additionally by the plate 4 of the supports 3 in the area of the corners 2, which results in significantly improved fire safety overall.

According to the invention, the lower plates 1 or the second plates 7 of the lower plates 1 lie directly on the plates 4 of the supports 3, while the upper plates 5 rest primarily on the shoulders 8 of the lower plates 1 and are therefore only indirectly supported on the supports 3.

To improve the sound insulation, in particular the impact sound insulation, a damper element 13 is arranged on the plate 4 of the support 3. This damper element 13 is made of rubber and has a flat disc-shaped area 14 which essentially covers the entire surface of the plate 4 and, when the lower plates 1 are placed on the supports, causes the actual damping between the plate 4 and the lower plate 1. Holding areas 15 are formed on the circumference of the damper element 13, which grip around the plate 4 in some areas and thus secure the damper element 13 against slipping.

In the areas in which, due to the diagonal beveling of the second plates 7 of the sub-plates 1, the sub-plates 1 do not rest on the plate 4 or the damper element 13, the damper element 13 has projecting stop axially with respect to the longitudinal axis of the support 3. or centering elements 16. These serve on the one hand to fix the position of the lower plates 1 in the floor plane when installing the raised floor according to the invention and on the other hand as additional dampers for the upper plates 5 placed on the heels 8, the axial height of these stop or centering elements 16 being at least slightly greater than the height of the flange-like shoulders 8.

The embodiment shown in Fig. 3 differs from the embodiment of FIG. 2 essentially in that the lower plate 1 does not consist of a base plate 6 and a second plate 7, but that instead of the second plate 7 a closed peripheral profile frame 17 on the Bottom of the base plate 6 is arranged in the plate plane protrudes on all sides over the edge areas of the base plate 6 and thus forms the paragraph 8 for supporting the top plates 5.

Claims (15)

Raised floor with a large number of floor slabs, which are each supported in the area of their corners by means of supports on a solid base, a cavity being formed between the underside of the floor slabs and the base.
characterized by
that the bottom plates (1,5) alternately in the manner of a checkerboard pattern as bottom plates (1) and top plates (5) are formed, the bottom plates (1) projecting on their side facing the surface a closed or interrupted flange-like projection essentially in the plate plane Have paragraph (8) on which the top plates (5) can be placed. Raised floor according to claim 1,
characterized by
that the lower plates (1) at least in the area of the shoulder (8) consist of fire-retardant or fire-resistant material or have a fire-retardant or fire-resistant coating. Raised floor according to claim 1 or 2,
characterized by
that the lower plates (1) have on their underside a closed or interrupted peripheral frame (17), in particular profile frame, which protrudes on the peripheral sides of the lower plate (1) and thus forms the paragraph (8). Raised floor according to claim 1 or 2,
characterized by
that the lower plates (1) are provided on their undersides with a sheet that completely or partially covers the underside, which protrudes over the circumferential sides of the lower plate (1), is bent in these areas to an open or closed dimensionally stable profile and so the paragraph (8) forms. Raised floor according to claim 1 or 2,
characterized by
that the lower plates (1) each have a base plate (6) which is connected essentially concentrically on its underside to a second plate (7), the second plate (7) being larger than the base plate (6) on the peripheral sides the base plate (6) protrudes over it and thus forms the paragraph (8). Raised floor according to claim 5,
characterized by
that the top plate (5) and the base plate (6) of the bottom plate (1) are substantially the same. Raised floor according to claim 5 or 6,
characterized by
that at least the second plate (7) of the lower plate (1) consists of fire-retardant or fireproof material, in particular gypsum fiber material. Raised floor according to one of claims 5 to 7,
characterized by
that the base plate (6) and the second plate (7) of the lower plate (1) are positively connected, in particular by nailing, stapling or the like, or non-positively, in particular by gluing. Raised floor according to one of claims 5 to 8,
characterized by
that a structure-borne and / or temperature-insulating material, preferably in the form of a thermoplastic film, is introduced between the base plate (6) of the lower plate (1) and the second plate (7). Raised floor according to one of claims 1 to 9,
characterized by
that the shoulder (8) in the area of the corners (2) of the lower plate (1) is bevelled essentially diagonally in such a way that the lower plates (1) or the base plates (6) of the lower plates (1) at the corners facing each other ( 2) lie directly against one another at least in the upper edge region (10). Raised floor according to one of claims 1 to 10,
characterized by
that the top plates (5) have such a shape and size that there is an essentially closed, flat surface of the raised floor when the top plates (5) are inserted between the immediately adjacent bottom plates (1). Raised floor according to one of claims 1 to 11,
characterized by
that the surfaces of the supports (3) supporting the base plates (1,5) are provided with a structure-borne sound-insulating covering or damping element (13), in particular made of an elastomer, for example rubber. Raised floor according to claim 12,
characterized by
that the covering or the damper element (13) has knobs or stop and / or centering elements (16) protruding upwards from its main plane in the area in which no lower plates (1) lie directly. Raised floor according to one of claims 1 to 13,
characterized by
that the lateral peripheral or edge surfaces of the base plates (1,5) are bevelled at least slightly towards the surface (11). Raised floor according to one of claims 1 to 14,
characterized by
that the lower plates (1) on the supports (3) and / or the supports (3) on the substrate are positively and / or non-positively, in particular by gluing, screwing or stapling.

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