MX2015001029A

MX2015001029A - Cover.

Info

Publication number: MX2015001029A
Application number: MX2015001029A
Authority: MX
Inventors: Stephan Meier; Johanna Spicale; Thomas Dau; Marco Wenk
Original assignee: Ahlmann Aco Severin
Priority date: 2012-09-10
Filing date: 2013-09-09
Publication date: 2015-07-23
Also published as: DK2904166T3; WO2014037544A1; DE102012108392A1; CN104619931A; US20150233081A1; PL2904166T3; EP2904166A1; CN104619931B; BR112015005174B1; AU2013311585A1; ZA201501818B; MX355656B; RU2015113018A; RU2614586C2; EP2904166B1; JP6082465B2; AU2013311585B2; BR112015005174A2; LT2904166T; ES2748839T3

Abstract

Covers for structures, for example drainage channels or the like, which can be installed into a floor are known, said covers comprising a surface (11) which can be accessed and driven over and which comprises a flat structure (13) on a first lower plane and elevations (14) with top surfaces lying above the flat structure (13) on a second higher plane. The aim of the invention is to improve the non-slip properties and to achieve a self-cleaning effect. This is achieved in that the top surfaces (15) have an anti-slip surface structure which comprises a plurality of individual elevations. The ratio of the air volume below the individual elevations (16) to the volume of the individual elevations (16) is Vv/Vm=(0.01 to 0.5)/(0.001 to 0.05).

Description

COVER Field of the Invention The invention relates to a cover for a work that can be embedded in a floor according to the preamble of claim 1.

Background of the Invention To install installations in the ground or (in particular) for the drainage of surfaces, there are known channels and wells that are covered by covers. These covers are partly driven by motor vehicles, but also in particular by pedestrians. Particularly when it is wet or there are dirt there is a risk of slipping and with it also one of injuries.

The covers, in particular the cover grids, are known in many ways. For example, DE 1853 985 U, DE 202006 014 082 Ul, DE 8909 748 Ul or DE 1876 986 U teach roof grids which are provided with a surface structuring in the form of slits (wedge-shaped) or they comprise elevations with a triangular cross section. Furthermore, for example by the German utility model M 9 505 847 channel covers according to the preamble of claim 1 are known, which have elevations that must guarantee safety against slips.

Ref. 253391 However, the known arrangements are only limitedly slip-proof. In particular when the covers are made of a plastic material, especially injection molded, dirt is easily produced which contributes to an increased risk of accidents.

Furthermore, it is true that the known anti-skid structures often offer a sufficient impediment against slippage in indoor areas, for example in spas, where clean water runs on the cover grilles without dirt particles. But as soon as dirt particles, for example in outdoor areas, arrive on the cover grids, the macrostructures (for example just these known flutes) and known microstructures (grains) are clogged due to the entrance of a mixture of particles of dirt and water, and a sufficient anti-slip property is no longer possible.

Brief Description of the Invention The object of the invention is to indicate a cover of the type under consideration in the sense that, with as little expense as possible, greater safety against slipping is guaranteed.

This problem is solved by a cover according to claim 1.

In particular this problem is solved by a cover for a work that can be embedded in a floor, in particular a well, an individual drain, a drainage channel or similar drainage device comprising a surface on which it can be traveled on foot and with vehicles having a flat structure in a lower first plane and elevations with upper surfaces that are they are in a second upper plane above the flat structure, due to the fact that the upper surfaces of the elevations have a non-slip surface structure comprising a multitude of individual elevations, the ratio of the volume of air below the individual elevations being with respect to the volume of the individual elevations Vv / Vm is preferably (0.01 to 0.5) / (0.001 to 0.05), preferably (0.02 to 0.2) / (0.002 to 0.01).

That is, the anti-slip structures are transferred vertically upwards from the plane of the actual cover (the lower plane), so that significantly more dirt particles are needed to fill the space between the anti-slip structures and to cancel the anti-slip property.

That is, an essential point of the invention is that even if the powder particles are introduced into the anti-skid surface structure, they can be easily dragged or also displaced by transit in the lower regions between the elevations.

Preferably the individual elevations have different maximum heights. By this means it is also achieved that in the case of incrustation of dirt particles in the different height zones of the anti-skid structures, these dirt particles in turn have different heights and in this way they themselves act in an anti-slip manner.

It is possible that the lower planar structure comprises in the lower first plane a non-skid surface structure that is less rough than the non-skid surface structure of the upper surfaces of the elevations. The planar structure below can for example have a graining to obtain a desired optics, for example a casting optics, as well as to increase the roughness and with it the anti-slip properties of this flat structure.

The maximum heights are preferably provided within a distribution in a range of Sz = 150 mm to 1,500 mm, preferably between 230 mih and 1,000 mpi. This dimensional magnitude (as well as also the dimensional magnitudes indicated in the following description and in the claims) was taken from DIN EN ISO 25178. It refers expressly to this, being that there are also described measuring methods that lead to the magnitudes indicated below.

The distribution of individual elevations and their size can be done on a regular basis. However, preferably a distribution is chosen in a random distribution on the surface, so that also within smaller areas higher and lower individual elevations are envisaged.

The individual elevations can be provided in different ways (seen in horizontal section). However, preferably the individual elevations are configured in the form of a pyramid or truncated pyramid shape.

The maximum depression heights of individual elevations (also called trough heights) are Sv = 50 mm to 500 mih, preferably 85 mm to 310 mm. Surprisingly this interval turned out to be particularly favorable.

The roughness value of the planar structure is preferably from Sa = 10 mpi to 200 mpi, preferably 15 mih to 90 mpi. The unfolded aspect ratio (according to DIN EN ISO 25178 also designated as a split surface area ratio of a limited scale area) of the planar structure is preferably Sdr = 20 to 300%. The planar structure preferably has a ridge density of Spd = 0.5 to 20 mnr1, preferably 1 to 10 mnr1.

THE intervals of magnitude previously mentioned unexpectedly have a special effect in the sense that on the one hand in the crests lesions are hardly produced but on the other hand an adequate slip-resistance and "self-cleaning intensity" are obtained.

Brief Description of the Figures In the following the invention is explained in more detail by very schematic figures. They show: Figure 1 a top plan view on a cover grid for a drain channel or ditch, Figure 2 a section along the line II-II of figure 1, and Figure 3 an amplified representation of detail III of figure 2.

Detailed description of the invention As can be seen from the figures, the mode shown here of the grid 10 comprises a supporting structure which has a surface 11 which is in a lower first plane. The surface 11 is interrupted by drain openings 12 and forms a smooth flat structure 13. The flat structure 13 is provided with a very insignificant surface roughness, as can be obtained for example on a surface that is produced with an injected casting process of plastic.

On this surface 11 are provided bar-shaped elevations 14 whose upper surfaces of the elevation 15 have the roughness described, which in particular is obtained in the injection-molded iron by a corresponding shape of the injection-molded mold. The upper surfaces of the elevations 15 comprise in this aspect individual elevations 16 which - as outlined in Figure 3 - are produced with individual pyramids of different height and different sharpness.

By this form it is ensured that on the one hand the dirt particles arriving at the elevations 14 are easily dragged and transported to the smooth flat structure 13. From the flat structure 13 the dirt particles are in turn evacuated to the openings of drain 12, so that by means of the construction selected here a kind of "autonomous cleaning effect" is produced. Even when being driven, by the forces that are present the accumulation of dust particles is reduced, by virtue of which these are squeezed out via the upper surfaces of the elevations 15 and transported to the smooth flat structure 13 to finally reach the drainage openings 12.

List of reference symbols 10 Cover 11 Surface 12 Drain opening 13 Flat structure 14 Elevation 15 Top surface of the elevations 16 Individual lift It is noted that in relation to this date, the best method known to the applicant to carry out the aforementioned invention, is that which is clear from the present description of the invention.

Claims

CLAIMS Having described the invention as above, the content of the following claims is claimed as property:

1. Cover for a work that is embedded in a floor, in particular a well, an individual drain, a drainage channel or similar drainage device, which comprises -a surface on which it is possible to walk on foot and with vehicles having a flat structure in a lower first plane and - elevations with upper surfaces that are in a second upper plane above the flat structure, - being that the upper surfaces of the elevations have a non-slip surface structure comprising a multitude of individual elevations and is rougher than the flat structure below, characterized in that the ratio of the volume of air below the individual elevations with regarding the volume of the individual elevations is Vv / Vm = (0.01 a 0. 5) / (0.001 to 0.05).

2. Cover in accordance with the claim 1, characterized in that the ratio of air volume per below the individual elevations with respect to the volume of the individual elevations is Vv / Vm = (0.02 to 0.2) / (0.002 to 0.01).

3. Cover according to any of the preceding claims, characterized in that the individual elevations have different maximum heights.

4. Cover according to any of the preceding claims, in particular according to claim 3, characterized in that the maximum heights are provided within a range of Sz = 150 mm to 1,500 mm, preferably 230 mpi to 1,000 mpi.

5. Cover according to any of the preceding claims, in particular according to claim 4, characterized in that the distribution is a random distribution.

6. Cover according to any of the preceding claims, characterized in that the individual elevations are configured in the form of a pyramid or truncated pyramid shape.

7. Cover according to any of the preceding claims, characterized in that the individual elevations have a maximum depression height of Sv = 50 mm to 500 mih, preferably 85 mth to 310 mpi.

8. Cover in accordance with any of the previous claims, characterized in that the roughness value of the planar structure is Sa = 10 mm at 200 mih, preferably 15 mih at 90 mm.

9. Cover according to any of the preceding claims, characterized in that the unfolded aspect ratio of the planar structure is Sdr 10 to 500%, preferably 20 to 300%.

10. Cover according to any of the preceding claims, characterized in that the planar structure has a ridge density of Spd = 0.5 to 20 mnr1 preferably from 1 to 10 mnr1.