CZ2022402A3 - Drain grid - Google Patents

Abstract

The subject of the invention is a drainage grid comprising a support plate (1) and at least two holders (4) for cladding elements (3) arranged in the longitudinal direction of the support plate (1). At least one drainage hole (8) is formed in the support plate (1) through which water drains during use into a drain, waste, etc. Each bracket (4) includes two opposite handles (2) positioned to hold two opposite ends of the cladding element (3). Each grip (2) comprises three walls, where two opposite walls, the first wall (5) and the second wall (6), clamp the cladding element (3) and the third wall (7) secures the cladding element (3) in a transverse direction. Adjacent brackets (4) are offset from each other, thereby creating a gap between the cladding elements needed for water to drain into the drain hole (8) and further into the gutter.

Description

Drain grate

Field of technology

The presented invention is aimed at drain grates intended especially for swimming pools and showers.

Current state of the art

In the current state of the art, different designs of drain gutters and their covers are known. One of these embodiments is to cover with the help of a drain grid, as described for example in the document US 20150247312 A1.

In the document US 20150247312 A1, a drain grid is described, which is formed by a group of bars that is vertically attached to a second group of bars, which visually creates a grid. This allows water (or other liquids) to drain between the individual plugs. Furthermore, the grid structure covers the hollowed-out baseboard, aligns the area with the floor of the shower corner, and thus prevents injuries caused by unintentionally stepping into an uncovered baseboard when moving in the shower corner. The drain grid from document US 20150247312 A1 has height-adjustable legs, which allows one grid to be used for different joint depths and to ensure the grid is aligned with the floor. This grating is a complete structure and its dimensions are only difficult to adjust after production. Thus, when changing the width and length of the batten, it would be necessary to replace the entire grid or, for example, cut it if the dimensions of the batten are smaller than the size of the grid, with all dimensions of the batten, for example, injuries could occur due to a finger getting stuck in the gap created by the large dimensions of the batten and the small outer dimensions of the drain gratings. With non-standard dimensions of the sink, it can be quite complicated to find the correct drain grates. Furthermore, this grate is made of metal, which can become unpleasant and even dangerous, for example, in the summer when using the grate in the garden (swimming pool, outdoor shower). Also, this grille may not be original from the user's point of view, as the appearance of this type of drain grille may not be visually satisfactory in all spaces.

Another part of the implementation is to cover the sink with a complete block, where the drain grid is not created. Water drains through the gaps created by the clearance between this block and the rib, so there is a much smaller area for water to drain.

It would be advisable to come up with a solution that would enable the safe covering of the gutter even with non-standard dimensions of the drain gutter and at the same time enable the drainage of water even with a larger flow (e.g. when the pool overflows), and enable convenient and safe use also for outdoor spaces, various design arrangements according to users etc.

The essence of the invention

To a certain extent, the above-mentioned shortcomings are eliminated by the drain grid, which includes a support plate and at least two holders for cladding elements. At least one drainage hole is created in the support plate, through which, when in use, water flows into the drain pan, waste, filtration, etc. The longitudinal axis of the support plate, and thus its longitudinal direction, is defined by the direction in which the facing elements are placed one behind the other in the holders . When placing the drain grate in the joist, the longitudinal direction of the support plate corresponds to the longitudinal direction of this joist, with the cladding elements forming the grate bars running across. The holder includes two grips, which are positioned opposite each other in such a way as to grip two opposite ends of the cladding element. The grip includes a first wall and a second wall that are perpendicular to the longitudinal axis of the support plate, and a third wall that is perpendicular to the first wall and the second wall. In the event that the axis of the support plate is curved, the first and second walls are perpendicular to this axis locally, at least on the part of its length that passes between the two handles of the given holder when viewed from above.

- 1 CZ 2022 - 402 A3

The first wall together with the second wall are designed to support the cladding element. The third wall is designed to effectively secure the cladding element - it therefore represents a stop against the movement of the element. Adjacent holders are offset from each other, which creates a gap between the cladding elements, allowing water to drain into the drain hole and then into the gutter.

The advantage of the invention lies in the fact that it is very adaptable to the needs of the user. It makes it possible to insert various tiling elements according to the user's requirements, for example different colors or materials of the tiling elements even in one drain, whether the tiling element will be glossy or matte. Another option is to choose the material of the cladding element, for example concrete, and cover it with bathroom tiles according to the user's choice, so the cladding element can also be created from a combination of several materials. This design also allows for the user-friendly installation of its own cladding elements according to the user's own discretion - the support plate can be adapted to the surrounding construction by choosing the cladding elements, for example the material of the tiles around the pool or the floor of the shower corner.

At the same time, it is possible to easily replace the cladding elements or, on the contrary, to easily replace the supporting plate without the need to purchase new cladding elements. In comparison with metal or silver drain pipes, the fifth invention, in addition to a better design, also provides greater comfort when stepping on the pipe, without the ability to pass water being negatively affected. Preferably, the cladding elements can have a prism shape, where the longer dimension of the prism in the vertical direction of the support plate can be at least four times greater than the dimension in the longitudinal direction of the support plate.

The drain pipe can also be supplied with cladding elements adapted to the size of the holders.

The drain mfizka can be used, for example, in shower corners, but also in garden showers or swimming pools, as it enables the use of cladding elements or A non-footing surface made of practically any material, for example, material that would only minimally accumulate heat, so that it does not burn to the touch in direct sunlight, material that does not slip when wet, etc.

The drain pipe is designed with at least two holders for cladding elements, but at least five holders are preferable, so that the drain pipe visually meets the appearance of the pipe and ensures sufficient water drainage.

Between every two adjacent supports, in the offset between the supports and the cladding elements, the drainage hole of the support plate can be conveniently placed. In other words, when viewed from above, the drain holes in the support plate are preferably aligned with the gaps between the brackets. In this way, faster drainage of water flowing between the cladding elements can be ensured. Thanks to the faster drainage of water, even smaller offsets can be sufficient, and thus, for example, a smaller risk of injury in the case of, for example, a toe getting stuck while moving on the drain pipe.

The support plate can have at least four height-adjustable support legs on the bottom side to ensure sufficient stability when moving on the drain pipe and to align the drain pipe, for example to a horizontal position or a slope corresponding to the surrounding construction. This means that one drain valve can be used for different drains with different heights, uneven bottoms, etc.

Conveniently, the grips can be removable, which simplifies, speeds up and thus also makes production cheaper. Furthermore, with regard to the production method of the support plate, material waste can be reduced, because it is then possible to use a smaller piece of material. For example, when machining a support plate with handles, it is necessary to use a larger block of material so that these handles can be discarded, which creates more waste material. Thanks to the removable grips, the same grips can also be used for different types of support plates (different types of brackets). For the production of a non-standard drain pipe, it is enough to make a support plate (without grips) in the given grip, and fit it with standardized grips, which is easier and cheaper than producing a support plate with grips in the given unusual grip. The grips can be arranged symmetrically with respect to the longitudinal axis of the support plate, especially in the case of a straight drain pipe. AT

- 2 CZ 2022 - 402 A3 curved drain pipes can have one handle of the pair larger in the longitudinal direction than the other, but preferably they are at the same distance from the longitudinal axis.

Preferably, the drain line includes a damper pad or multiple pads, for placement under the cladding elements. By using shock-absorbing pads on the support plate under the tiling element, which absorbs a significant amount of energy when moving on the drain body, it is possible to dampen noise and vibrations, increase comfort when stepping on it (movement along the entire drain body is smoother and softer, from the user's point of view) and extend the life of the support plates or cladding elements. It can also form between the surface of the shock-absorbing pad and the cladding element, which also helps to prevent the movement of the cladding element together with the grips, and thus can extend the life of the grips themselves.

The carrier plate of the drain assembly may advantageously include an outlet at one end and a complementary recess at the other end for connecting further drain assemblies in succession in a longitudinal direction. This makes it possible to adapt to different lengths of drain ribs in the longitudinal direction, and it is also possible to connect several drain frames of different shapes of the support plate, which makes it possible to adapt to, for example, different shapes of swimming pools. This connection, with the help of outlets and recesses, conveniently enables the following individual drain pipes to be easily selected from the connection, for example, so that when viewed from above, the outlets on one pipe and the recesses on another pipe do not overlap, so then I define the position of neighboring pipes, especially in the vertical and/or longitudinal direction . For example, if one drain pipe near the pool is damaged, it is enough to remove this one piece of drain pipe and simply connect a new, undamaged piece, without affecting other sections of the drain pipe.

It is advantageous to have a protrusion on the wall, for example, in a perpendicular direction to the longitudinal axis of the support plate, which can, for example, take the form of a horizontal protrusion running through the entire wall. This insert can then fit into the complementary recess created at the end of the cladding element when the cladding element is placed in the holder. The cladding element is then secured against vertical movement, to remove it from the holder it is then e.g. it is necessary to push the wall away from the cladding element with a suitable tool. It is advisable to have this insert on at least one handle of each holder to secure each facing stone against accidental removal, the best securing of the facing elements is ensured by providing an insert on each handle and a corresponding recess on each end of each facing element.

The outflow mechanism may include at least one stop extending the support plate in the vertical direction, preferably two stops in both vertical directions. The stop makes it possible to adapt the outflow mechanism to different flanges of different functional dimensions. Preferably, at least four stops are provided, two on each side of the frame located near the end of the support plate.

Clarification of the drawing

The essence of the invention is further explained on the examples of its implementation, which are described with the use of the attached drawings, where on:

Fig. 1 is a schematic illustration of an isometric view of the drain pipe from above, i.e. from the side, in which some of the holders are empty and some of the cladding elements are attached, Fig. 2 is a schematic diagram of the isometric view of the bottom of the drain pipe, where the support legs are visible threaded for height adjustment and the lower ends of the individual grips secured in the support plate are visible, Fig. 3 shows a detail of the grip with a protrusion for securing the cladding element,

- 3 CZ 2022 - 402 A3 Fig. 4 shows a detail focused on the stop for defining the transverse clearance between the drain grate and the flange, Fig. 5 is a schematically illustrated isometric view of two connected drain grates, one straight and the other with a curve, and Fig. .6 is an isometric view of the cladding element with a complementary recess for the protrusion on the handle.

Examples of implementation of the invention

Examples of the invention will be explained further on the examples carried out with reference to the relevant drawings. The first suitable embodiment of the invention and its parts are shown in Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 6.

As can be seen from Fig. 1 and Fig. 2, the drain grid includes a support plate 1, holders 4 and possibly also cladding elements 3. In the support plate 1 there are drain holes 8 through which water flows into the drain pan. The longitudinal axis and direction of the support plate 1 are defined by the direction in which the cladding elements 3 are arranged on the support plate 1. In the case of the embodiment from Fig. 1, where the support plate 1 has a rectangular shape, it can be seen that the longitudinal axis here is parallel to the longer sides of this rectangle. The holder 4 includes a pair of grips 2, which are placed opposite each other, symmetrically along the longitudinal axis of the support plate 1 so that they grip the two opposite ends of the facing element 3. The grip 2 includes a first wall 5 and a second wall 6, which are perpendicular to the longitudinal axis of the support plate 1, and the third wall 7, which is perpendicular to the first wall 5 and the second wall 6. The shape of these grips 2 resembles a climbing U-profile shaped and dimensionally adjusted to insert the end of the cladding element 3.

A cladding element 3 can be inserted between the first wall 5 and the second wall 6 of the attachment 2 so that the clearance between the walls and the surface of the cladding element 3 is, if possible, zero - so that the first wall 5 and the second wall 6 support this cladding element 3. If the attachment is 2 made of flexible material (e.g. plastic), an overlap (for example up to 2 millimeters) can be chosen for a tighter fit, where the longitudinal dimension of the cladding element 3 (i.e. the dimension measured in the longitudinal direction of the support plate 1 on the cladding element 3 fixed in the support plate 1 , usually shorter than the horizontal dimension of this cladding element) will be greater than the longitudinal distance of the first wall 5 from the second wall 6. When the cladding element 3 is pushed into the grip 2, these walls will then open and pre-spring. Alternatively, the handle 2 can be made of, for example, metal materials. The third wall 7 is used to firmly secure the cladding element 3. It is convenient to have a protrusion 15 on the third wall 7 protruding, for example, horizontally perpendicular to the longitudinal axis of the support plate 1, which can, for example, take the form of a horizontal protrusion 15 extending through the entire third wall 7, as can see in Fig. 3.

In embodiments with this protrusion 15, the drain grid is intended for use with cladding elements 3 containing complementary recesses 13 for the protrusion 15 in the cladding element 3 formed at the end of the cladding element 3, or includes such cladding elements 3. The protrusion 15 can alternatively be placed on both handles 2 of one or more holders 4. Alternatively, the protrusion 15 can have any other shape, e.g. cylindrical or semi-spherical protrusion 15. Alternatively, the protrusion 15 can also be placed on the first wall 5 and/or the second wall 6, for example even in combination with the protrusion 15 on the third wall 7, which can make it considerably more difficult to accidentally remove the cladding element 3. These three walls of the attachment 2 are not directly connected together, which enables simple attachment of the cladding element 3, the movement of the walls with the protrusions 15 and the size of the cladding element 3 may have slight deviations (e.g. ±1 millimeter).

The holders 4 are offset from each other on the support plate 1. This offset determines the gap between adjacent cladding elements 3. It is advantageous to choose a uniform offset on the drain grid, e.g. chosen from an interval of 1 to 8 mm, preferably 3 to 6 mm. The offset should ideally not be larger

- 4 CZ 2022 - 402 A3 than 1 centimeter from a safety point of view, so that, for example, a toe does not get stuck in the gap between the cladding elements 3 created by this offset or that larger objects and dirt do not fall through the grid. At the same time, the offset is preferably large enough to ensure water drainage with sufficient flow for the given application.

Cladding elements 3 create the main footing and viewing surface, preferably flat. With this in mind, the material and shape of the elements is chosen. A suitable shape is, for example, a prism. Preferably, the cladding elements 3 have a longer dimension in the transverse direction of the support plate 1, preferably at least twice, more preferably at least three times, than in the longitudinal direction. The longitudinal dimension of the cladding element 3 may conveniently be in the range, e.g., 2 to 15 centimeters. Furthermore, the cladding element 3 can have rounded edges to prevent, for example, the leg from being cut by a sharp edge or corner. Alternatively, the facing element 3 could have the shape of a cylinder, e.g. with a semicircular base, and the handles 2 then have a corresponding shape for holding the facing elements 3 with a curved cross-section. The material of the cladding element 3 can be different, for example natural stone, marble, concrete, wood, polymer materials and others. This enables considerable adaptability to the user's requirements. Another modification of the facing element 3, for example whether it is glossy or matte, can again be chosen according to the user's preference. Another option is to choose the material of the cladding element 3, for example concrete, and cover it with bathroom tiles of the user's choice. Also, the user can choose different types or, for example, color variants of the cladding element 3 in one drain set.

For a better securing of each cladding element 3, it is advisable to create a complementary recess 13 (see Fig. 6) for the insert 15 on the handle 2 on each cladding element 3 at least at one of its ends. Alternatively, a recess 13 can be created for the insert 15, for example, only on the end facing elements 3, which are at the ends of the drain grid, which would ensure that the facing elements 3 are the easiest to remove from the grid. Inside, the lining elements 3 have only a small gap for water drainage in the longitudinal direction, so it can be assumed that it will not be so easy to remove them unintentionally, for example with a child.

It is convenient to place the drain hole 8 between the individual cladding elements 3 when viewed from above. The larger the gap between these cladding elements 3, the faster water will flow to the support plate 1 and through it through the drain holes 8. The size of the drain hole 8 in the longitudinal direction of the support plate 1 can be, for example, between 2 millimeters and 2 centimeters, and it does not have to be the same as the mutual offset of the holders 4. In an alternative variant, where the tiling element 3 is a tiling cylinder, the drain hole 8 can be larger and extend into the projection of the cylinder on the support plate 1, where the water would flow along the cylindrical surface and flush the drain hole 8 it was not covered, which can increase the speed of water drainage and prevent dirt from being trapped between the tiling elements. This function can generally be performed by any cladding element 3 tapering downwards towards the support plate 1, for example with a trapezoidal cross-section.

A stop 14 can also be part of the drain grate, preferably more stops 14 (for example, two on each longer side of the support plate 1, symmetrically distributed according to the vertical axis of the support plate 1 with a pair of stops 14 on the other longer side). The stop 14 (see Fig. 4) can be inserted into a slot of a complementary shape, which can be formed on the longitudinal edge of the support plate 1 in the transverse direction (see Fig. 4). Stop 14 serves to secure the drain grate in the drain pan in the horizontal direction. The stop 14 can have a knurling at its end protruding from the support plate 1, which is used to adapt different vertical dimensions of the bracket - thanks to the knurling, it is easy to shorten the stop, e.g. with pliers, taking into account the clearance between the side of the support plate 1 and the side wall of the bracket, so it is possible to easily and relatively accurately ensure that the drain grate fits into the sink so that the grate cannot move in the horizontal direction.

The components of the invention can be the damping pad 10 placed between the cladding element 3 and the support plate 1. It can be attached, e.g. glued, to the lower side of the cladding element 3 or to the top side of the support plate 1. The damping pad 10 is intended especially for damping the impact of the foot when of movement on the facing elements 3 and preventing possible vibration of the facing elements 3 in the holder 4. It can also supplement the function of the holder 4 by increasing the friction between the surface of the damper

- 5 CZ 2022 - 402 A3 of the pad 10 and the cladding element 3 / support plate 1, thereby preventing the movement of the elements and extending the life of the holder 4. To perform these functions more effectively, it is more convenient to fix the shock absorbers of the pad 10 to the support plate 1, for example by sticking with waterproof glue. The damping pad 10 also prevents the occurrence of unwanted sounds when the cladding element 3 is more loosely attached by moving the cladding element 3 on the support plate 1. The damping pad 10 can also extend the life of the support plate 1, as it absorbs part of the energy from the impact of the foot, i.e. it dampens the impact of the cladding elements 3 to the support plate 1 at the chúzi. Damping pad 10 should preferably be made of a material with a small modulus of elasticity in compression (for example, 1 to 80 megapascals) and a small rebound elasticity for high mechanical damping. Suitable materials are, for example, silicone or rubber, for example natural rubber. The damping capacity also depends on the size of the damping pad 10, for a greater damping effect it is advisable to use a continuous rectangular strip of the damping pad 10, for example, with a length and width of 1 to 3 millimeters smaller on each side than the transverse and longitudinal dimensions of the cladding element 3. also use, for example, cut thin strips of cushioning pads 10, which are glued in thin strips under the cladding element 3 and thus do not cover the entire area under the cladding element 3. Depending on the vertical dimension, the cushioning pads 10 can thus be placed under the cladding element 3 when the cladding element 3 is not loaded create gaps through which water can also drain. It is also possible to make the damper pad 10 in one piece over the entire support plate 1, with holes at the corresponding places above the drainage holes 8 of the support plate 1.

Legs 9 can also be part of the support plate 1, which can be used to adjust the height of the drain grate in the baseboard and to compensate for possible inaccuracies. In this way, one drain grid can be adapted to a large number of drain pipes. In the suitable embodiment shown in Fig. 2, the support plate 1 has cylindrical legs 9 with a thread along the entire length. The height is thus adjusted by screwing the leg 9 into the thread created in the support plate 1. It is advisable to create the thread in places where it provides the greatest support in the case of four legs 9, e.g. in the corners of the support plate 1. When applying to a low joint, the length of the legs may be appropriate 9 can be shortened, for example by cutting it, because the legs 9 could protrude from the opposite side of the support plate 1 and thus interfere with the seating of the cladding element 3 in the holder 4. The groove can be made from below the support plate 1 only to a certain depth, so that the legs 9 protrude above the support plate 1 disabled. Legs 9 can advantageously be made of, for example, polymeric or metallic stainless steel materials. To ensure sufficient stability, especially when the user moves along the drain grate, it is advisable to have at least four legs 9 for one drain grate, and for longer grates, for example, 6 or 8, as in Fig. 2. Alternatively, you can have, for example, telescopic legs 9, including more members that can be inserted into each other, which would reduce the height of the drain grate in the sink.

Conveniently, the handles 2 are removable, as can be seen, for example, in Fig. 4. The handles 2 are made in a shape reminiscent of the support plate 1 I-profile when viewed in the transverse direction, where three walls are vertically attached to the upper horizontal surface. The vertical part of the grip 2 can be inserted into the complementary cutout created on the support plate 1 (see the detail in Fig. 4, where two of these cutouts are visible without the grip 2). When the handle 2 is inserted into the cutout, the second horizontal surface secures the handle 2 from the underside of the support plate 1 against vertical removal. Preferably, the cut-out when viewed from above at the end closer to the longitudinal axis is widened, see Fig. 4, with a corresponding widening on the vertical part of the grip 2, so that the grips 2 are reliably secured in place. When inserting holder 2 into the cut-out, the resistance of the cut-out walls must be overcome. The removable handle 2 greatly simplifies the production of the support plate 1, as it is, for example, only a flat surface where cuts and drain holes are made, which is simpler to manufacture than in the case where the walls should be cut on the support plate 1 for fixing the cladding element 3, which requires more material. Overall, making the special grips 2 and support plate 1 is a simpler and faster process as a result. Alternatively, the brackets 2 can be attached by a solid connection, for example glued, or in the case of metal brackets 2 and the support plate 1 welded, and they can also be made in one piece with the support plate 1.

The carrier plate 1 may be advantageously made of polymeric materials or metallic materials.

- 6 CZ 2022 - 402 A3

The drain line includes at least two holders 4 for the cladding elements 3, preferably at least five holders 4, more preferably at least ten, in order to ensure sufficient water drainage and that the water does not remain on the top surface of the cladding elements 3. These drainage gratings can be connected using the outlets 11 and complementary recesses 12 and thus form a system of drain grates of different lengths and different shapes. The connection of several drain grates can also be carried out, for example, with the help of different locking mechanisms created on the end shorter edges of the support plate 1. These locks and, in a suitable design, the connection with the help of exits 11 and selection 12 allow the individual drain grates to be easily removed from the system. For example, if one of the drain grates near the pool is damaged, it is enough to simply remove this one piece of the drain grate and simply connect a new, undamaged piece, without affecting the rest of the drain grate system.

The second suitable embodiment is shown at 0, where the straight drain grid with the rectangular support plate 1 of the first suitable embodiment is connected to the curved drain grid. The curved drain grate has a curved support plate 1 and a longitudinal axis. In order to maintain the same longitudinal dimension of the gaps between the individual cladding elements 3 in the entire drainage grid, the cladding element 3 preferably has a spreading shape - on the curved side with a larger radius, the cladding element 3 has a larger longitudinal dimension than on the opposite side with a smaller radius of the wedged support plate 1 In this embodiment, at least some cladding elements 3 have a trapezoidal shape with arms pointing approximately to the center of the curvature of the support plate 1, respectively. its longitudinal axis. Analogous shape, narrowing to the center of the curvature, in some versions, there may also be gaps between the holders 4, respectively. between the cladding elements 3. On the side with a larger radius, there will also be longer grips 2 than on the side with a smaller radius. This type of curved drain grate is suitable, for example, for overflow pools, which often have rounded areas. The present invention thus makes it possible to create an assembly of drain grates in the shape of a closed curve.

Claims (10)

1. A drain grid covering a support plate (1), which includes at least one drain hole (8), characterized in that the support plate (1) includes at least two holders (4) for cladding elements (3) arranged in the longitudinal direction of the support plate (1), whereby each holder (4) includes two opposite grips (2) designed to hold two opposite ends of the cladding element (3), whereby each grip (2) includes three walls, whereby the first wall (5) and the second wall (6 ) are perpendicular to the longitudinal axis of the support plate (1) and the third wall (7) is perpendicular to the first wall (5) and the second wall (6), whereby the adjacent holders (4) are offset from each other. 2. Drain grate according to claim 1, characterized by the fact that it includes at least two facing elements (3), whereby each facing element (3) is fixed by a holder (4) on the support plate (1). 3. The drain grid according to any one of claims 1 to 2, characterized in that at least one drain hole (8) of the support plate (1) is placed between every two adjacent holders (4). 4. The drain grate according to any one of claims 1 to 3, characterized in that the support plate (1) includes at least four height-adjustable support legs (9) of the drain grate. 5. Drain grate according to any one of claims 1 to 4, characterized by the fact that all handles (2) are removable. 6. A drain grid according to any one of claims 1 to 5, characterized in that it includes a cushion pad (10) for insertion between the support plate (1) and at least one cladding element (3). 7. A drain grid according to any one of claims 1 to 6, characterized in that the support plate (1) includes a protrusion (11) at one end and a complementary recess (12) at the other end for connecting the drain grids one behind the other in the longitudinal direction. 8. Drain grate according to any one of claims 1 to 7, characterized in that at least one holder (2) of at least one holder (4) includes an insert (15) protruding from the third wall (7) of the holder (2) and is adapted to secure of the cladding element (3) on the support plate (1) by fitting the socket (15) into the complementary recess (13) in the cladding element (3). 9. Drain grid according to any one of claims 1 to 8, characterized by the fact that it includes a total of at least five equally spaced holders. 10. Drain grid according to any one of claims 1 to 9, characterized in that it includes at least one stop (14) extending beyond the support plate (1) in the transverse direction of the support plate (1).