DE9406757U1 - Drain fitting for a tiled floor - Google Patents

Description

Patent attorneys

7/23 Dr. Loesenbeck <&idiagr;9&bgr;&thgr;)

Dipl.-Ing. Stracke
Dipl.-Ing. Loesenbeck

Jöllenbecker Str. 164, 33613 Bielefeld 1

Description

Franz Viegener II, Ennester Weg 57439 Attendorn

Drain fitting for a tiled floor

The invention relates to a drain fitting for a tiled floor according to the preamble of claim 1.

Such drain fittings, also called gullies, have the task of creating a drainage point for liquids on the surface of a floor, preferably tiled, and of creating a tight connection to the wastewater piping underneath this floor. To do this, a drain pot, preferably made of plastic, is installed underground in the floor and mechanically firmly and tightly connected to the piping, which is also installed underground. A rotating and height-adjustable attachment is inserted into the drain pot, which can be equipped with a grate at the level of the finished floor that is flush with the surrounding floor. The liquid to be drained runs through the grate and the height-adjustable attachment into the drain pot, which is equipped with odor trap elements, and from there into the drainage piping.

Such commercially available drain fittings are known from EP 0 371 068 and DE 38 63 357.4. With this drain fitting, the drain pot is cast into a molded cylinder of a concrete slab, preferably polyester concrete. Sloping surfaces are formed on the slab surfaces from the slab edges to the drain. Such drain fittings

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Doors are therefore prefabricated units that can be embedded in the finished concrete floor. Recesses are formed in the concrete floor to accommodate the drain and the connecting pipes. Screed can be applied to the concrete all around the slab up to the height of the edge of the slab so that the drain is set to the correct height.

To anchor the concrete slab of the well-known drain fitting, a fiberglass grid is cast into the concrete slab during installation, which is placed on the screed surrounding the slab during installation. This fiberglass grid is then embedded using mortar or the adhesive for the tiles and forms the basis for the tile covering to be applied. This creates a tensile bond between the slab and the surrounding area, which is particularly intended to prevent cracks in the joints. It is also known with commercially available drain fittings that the concrete slab is surrounded on all sides by cast-in structural steel mats, which protrude into the surrounding screed during installation, thereby creating a further rigid connection between the drain fitting and the surrounding area. This primarily serves to prevent the drain fitting from shifting if it is not installed correctly.

A disadvantage of this known design of the drain fitting is the formation of a firmly connected assembly unit consisting of the drain fitting, concrete slab and glass fibre mesh, which only allows the assembly of the complete unit. Another disadvantage is that the factory-made embedding of the glass fibre mesh causes it to interfere with the pouring of the screed around the concrete ring and prevents the formation of a smooth transition surface between the concrete slab and the surrounding screed. It can prove uneconomical that the drain pot always has to be installed connected to the concrete slab, as this is not always necessary depending on the application.

Franz Viegener II

The object of the present invention is therefore to combine a secure fastening of a drain fitting in the area surrounding the installation site with flexible, easy assembly and adaptability to the existing installation conditions.

The solution to this problem results from the characterizing features of claim 1.

What is essential to the invention for the drain fitting is that for the assembly of the drain fitting according to the invention, an adapted unit can be put together for each installation case from the three individual components: drain pot, concrete plate with steel reinforcements and the glass fiber mesh mat. These three parts are available independently of one another and can be assigned to one another depending on the circumstances of the installation case. The concrete plate can also be screwed onto height adjustment pieces or pre-assembled in shower cubicles where the drain is then subsequently attached to it.

For this purpose, the appropriately shaped concrete plate, preferably polyester concrete, is usually placed on a large-area flange of the drain pot and secured to it using fasteners. The concrete plate has a central, predominantly cylindrical recess through which the height-adjustable attachment with the drain grate can be inserted after the entire unit has been assembled. The concrete plate has steel reinforcements cast into the concrete plate below the tile-side surface, which consist of structural steel mats arranged horizontally on all sides and serve in a known manner to anchor it to the surrounding screed. The unit assembled in this way, consisting of drain pot and concrete plate, is inserted into prepared recesses or recesses in the concrete floor and aligned. After the concrete plate has been cast with the surrounding screed and its

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After curing, a separately provided mat made of glass fibre mesh is placed on the resulting surface, which is preferably level with the concrete slab. The glass fibre mesh mat, which has adapted recesses for the area of the drain pan, is spread out over the concrete slab and adjacent areas of the surrounding screed.

The glass fiber mesh mat is used to prevent cracks in the joints in a layer of tiles that is usually applied to the screed. The occurrence of such cracks in the joints depends greatly on the specific installation, so that the installation of such a glass fiber mat is not absolutely necessary everywhere. If a glass fiber mesh mat is required, the closer the glass fiber mesh mat is to the screed surface and thus below the underside of the tiles, the greater the strength that can be achieved to prevent cracks in the joints. This requirement is met precisely by placing the glass fiber mesh mat on the finished surface of the concrete slab and surrounding screed as described. The glass fiber mesh mat is usually embedded in a tile adhesive or tile mortar that is applied to the screed directly when the tiles are being processed. After the adhesive or mortar has hardened, the glass fiber mesh mat forms a bond with the tiles on the one hand and the combined concrete slab/screed surface on the other.

In addition to the strength properties of the glass fiber mesh, the size of the covering area is also important for the load-bearing capacity of a layer reinforced according to the invention with a subsequently applied glass fiber mesh mat. By subsequently laying the glass fiber mesh mat on and around the fully embedded concrete slab, it is possible to extend the glass fiber mesh mat close to the central cylindrical recess in the concrete slab.

Franz Viegener II

It is also possible to make the glass fibre mesh mat significantly larger in size than the area covered by the steel reinforcement on all sides around the concrete slab. This also makes it possible to adapt to the existing installation conditions, if necessary also by making changes to the glass fibre mesh mat.

In a preferred embodiment, the concrete slab is circular on the outside and the fastening means required to attach the concrete slab to the drain pan, preferably screw connections, are attached in a rotationally symmetrical, evenly spaced manner in the form of a partial circle.

To seal the interface between the concrete slab and the flange of the drain pan, sealing elements, preferably in the form of rolling ring seals, are inserted into the grooves provided for this purpose. By attaching the fastening elements, these sealing elements are pressed in a force-fitting manner and thus seal the interior of the drain pan from the environment.

A preferred embodiment of a drain fitting according to the invention with a concrete slab and glass fiber mesh mat is shown in the drawing.

It shows:

Figure 1 shows a cross-section through a built-in drain fitting with attached concrete slab and steel

ings and lay-on glass fibre mesh mat,

Figure 2 is a plan view of the installed drain fitting of Figure 1 from the side of the later tiling.

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Figure 1 shows a preferred embodiment of a drain fitting according to the invention in section. The drain pot 1 made of plastic is provided with an outflow nozzle 9 and a flange 12 of the drain pot 1, whereby the outflow nozzle 9 is intended for connection to the drainage pipework (not shown). The flange 12 of the drain pot 1 forms a circular, disc-shaped contact surface for the concrete slab 3, which can be placed from above onto the flange 12 of the drain pot 1. The concrete slab 3, which is designed to fit and is circular, has a recess 15 in its central axis that is also essentially circular and predominantly cylindrical, the clear width of which is adapted to the predominantly cylindrical insertion opening 10 of the drain pan 1, which is also open upwards. An element for the odor trap 2, preferably a so-called dip tube, is inserted from above into this predominantly cylindrical insertion opening 10 for a height-adjustable attachment of the drain pan 1 (not shown). This odor trap element 2 is inserted into a cylindrical area 10 and sealed using a circumferential seal.

The screws 11, which can be inserted into the holes provided 13 in the drain pot 1, are used to fasten the concrete ring 3 to the flange 12 of the drain pot 1. Self-tapping screws are preferably used for this purpose. The separating surface between the concrete slab 3 and the flange 12 of the drain pot 1 is sealed using the seal 4, preferably a rolling ring seal with a circular cross-section, which is inserted into a circumferential groove 19 in the drain pot 1 and against which the concrete slab 3 is pressed using screws 11. This prevents liquid from escaping from the drain pot 1 via this separating surface.

A structural steel reinforcement 5 in the form of a structural steel mat is cast into the concrete slab 3 at the factory, whereby the

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Structural steel reinforcement is arranged horizontally on all sides around the concrete slab 3.

The complete drain fitting is now assembled in such a way that the concrete slab 3 is connected to the drain pot 1 using screws 11 after the seals 4 have been inserted into the groove 19 and the pre-assembled unit consisting of the drain pot 1 and the concrete slab 3 is inserted into prepared openings in the concrete floor 17. The outlet nozzle 9 is connected to the drainage pipework. After the pre-assembled unit has been aligned, the screed 16 is poured and leveled off at the height of the upper edge of the concrete slab. After the screed 16 has hardened, a uniformly high surface 6 is formed that is suitable for the application of tiles. The glass fiber mesh mat 7 with its recess 8 for the opening of the drain pot 1 is then placed on the resulting surface 6 made of concrete slab 3 and screed 16 in such a way that the insertion opening 10 for the height-adjustable attachment (not shown) is free and the glass fiber mesh mat 7 is spread out on all sides around the installation site according to the requirements of the installation case. In a final step, the tile adhesive or tile mortar is applied to the glass fiber mesh mat 7 and the tiles are embedded in this layer.

It is also conceivable to first apply the tile adhesive to the entire surface 6 and then place the glass fiber mesh mat 7 into it. After the applied material has hardened, the glass fiber mesh mat forms a fully bonded layer with the adhesive or mortar.

Figure 2 shows a top view of the installed drain fitting, with the glass fiber mesh mat 7 only shown as a cutout. The preferably rectangular structural steel mat 5 is cast into the concrete slab 3, with the cast-in areas of the structural steel

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mat 5 are indicated. The circular concrete plate 3 is placed concentrically on the flange surface 12 of the drain pot 1, whereby the screw connection is indicated by the blind holes 15 for receiving the fastening screws 11. The glass fiber mesh mat 7 covers the entire area of the installation site with the exception of the insertion opening 10 for the height-adjustable attachment, whereby the boundaries of the glass fiber mesh mat 7 can also extend further than shown here beyond the extent of the structural steel mat.

Claims (6)

Viegener II ·&idigr;·· *&iacgr;·* r.* &idiagr; ,.' Protection claims 1. Drain fitting for a tiled floor , characterized in that a suitably shaped plate (3) made of concrete, preferably polyester concrete, with a central, predominantly cylindrical recess (15) can be placed on, for example, a drain pot (1) or a height adjustment piece and attached thereto by means of fastening means (11), this concrete plate (3) has steel reinforcements (5) made of structural steel mats arranged horizontally on all sides for anchoring, which are cast into the concrete plate below the tile-side surface, - a separate mat (7) made of glass fibre mesh with adapted recesses (8) in the area of the drain pot (1) can be placed on the concrete slab (3). 2. Drain fitting according to claim 1, characterized in that the mat (7) made of glass fiber mesh fabric which prevents joint cracks can be attached to the surface on both sides of the transition between the concrete slab (3) and the surrounding surface (16), preferably by means of an adhesive. 3. Drain fitting according to one of claims 1 or 2, characterized in that the mat (7) made of glass fiber mesh is preferably larger in its dimensions than the area covered by the steel reinforcement (5). 4. Drain fitting according to one of claims 1 or 2, characterized in that the mat (7) made of glass fiber mesh almost completely covers the concrete slab (3) except for the central cylindrical recess (15). 5. Drain fitting according to claim 1, characterized in that the concrete slab (3) is circular on the outside and the Viegener II if · fastening means (11) are rotationally symmetrically and equally spaced. 6. Drain fitting according to claim 1, characterized in that sealing elements (4) can be attached between the concrete slab (3) and the drain pot (1).