US20150240498A1

US20150240498A1 - Flat roof construction, method of producing a flat roof construction and storm safety element

Info

Publication number: US20150240498A1
Application number: US14/423,318
Authority: US
Inventors: Roland Stulier
Original assignee: Sika Technology AG
Current assignee: Sika Technology AG
Priority date: 2012-09-05
Filing date: 2013-09-04
Publication date: 2015-08-27
Also published as: JP6412002B2; JP2015531439A; EP2893102A1; WO2014037408A1; EP2893102B1

Abstract

The invention relates to a storm protection element of a post which passes through a flat roof covering. In particular, the element is designed as a hold-down disk or plate with an opening surrounded by spring-elastic claws which are designed so as to determine an inner contour of the opening, the inner contour being attached to the outer contour of the post to be secured. The storm protection element can be pushed onto the post from the free end of the post against the elastic resistance of the claws, whereas the claws wedge against the post when a force acts in the opposite direction and thus fix the storm protection element in the position reached by the element upon being pushing onto the post.

Description

TECHNICAL AREA

The invention relates to a flat roof construction and to a storm protection element of a punctiform crash protection (Secupoint, ABS-Point). It furthermore relates to a method of producing a storm-protected flat roof covering.

PRIOR ART

Flat roofs must meet many requirements regarding tightness, heat insulation, use/shaping and maintenance. Requirements of sealing and safety play a special part here. Usually, crash protections are set at intervals on rather large flat roof surfaces into which the rope attachment points for securing workers performing mounting or maintenance work on the flat roof are introduced. It should be ensured that such protections that penetrate the roof skin and insulating layers under it do not offer a starting point for penetrating moisture. To this end special enclosures are customarily used that extend up to a certain height on the particular crash protection and are welded to the surface seal. Since there is basically the danger that such sealing elements can become loose due to wind suction, they are to be additionally secured mechanically, for which the concept of storm protection has become customary in the case of roof surfaces freely exposed to the weather.
FIG. 1 shows in the manner of a perspective top view a section of a flat roof 1 that is surrounded by a fascia 3 and on which several ventilating pipes 5 are arranged for illustrating different known measures for storm protection. In addition to fastening rails 7, that are used in particular for storm protection of the edges or roof penetrations (as shown in section A) but also for storm protection in the area of a ventilation pipe 5, even individual point fasteners (long screws 11 penetrating the covering and the insulating layer) are used for the storm protection of the cited sealing elements 9 on the ventilation pipe 5. This method for producing a storm protection is reliable but labor-intensive and cost-intensive and creates undesired, additional penetrations of the roof construction.
The invention therefore has the basic problem of indicating an improved flat roof construction, an improved storm protection element and an improved method for producing a storm-protected flat room covering.

PRESENTATION OF THE INVENTION

This problem is solved by a flat roof construction according to Claim 1, a storm prevention element according to Claim 3 and a method for producing a flat roof construction according to Claim 10. Advantageous further developments of the concept of the invention are subject matter of the particular dependent claims.
The invention comprises the consideration in the case of posts that form crash protection and penetrate in the area of a flat roof construction for protecting sealing elements against storm and wind suction based on the principle of multiply fixing these sealing elements in the edge and corner areas of the sealing and instead to provide a single storm protection element. It furthermore comprises the concept of associating this individual storm protection element spatially directly with the corresponding post and/or the sealing element surrounding it but to construct it in such a manner that the required holding effect on the flat section of the sealing element on the roof skin is ensured. This presupposes a lateral minimum extension of the storm protection element.
As a consequence of these considerations a storm protection element is made available that has a disk shape or plate-like shape and an opening through which the corresponding post extends. The circumferential edge of this opening is shaped in such a manner that the storm protection element is automatically held fast on the post at a height into which it was brought during the assembly so that a shifting up on the post with the undesired side effect of canceling the fixing effect of the sealing element is prevented.
The above-cited problem is solved by a flat roof construction with a flat roof covering and at least one post extending through this covering, wherein a storm prevention element is attached to the post and is constructed as a hold-down disk or hold-down plate that is surrounded by spring-elastic claws in such a manner that these claws determine an inside contour of the opening that is adapted to the outside contour of the post to be secured, and that the storm prevention element can be pushed from the free end of the post against the elastic resistance of the claws onto the post, whereas the claws wedge against the post when a force acts in the opposite direction and thus fix the storm protection element in the position reached by this element upon being pushed onto the post. With such a flat roof construction workers or objects to be secured can be secured in a reliable manner and the constructive effort and the costs are low. Furthermore, undesired (additional) penetrations of the construction can be avoided in a simple manner.
In an embodiment of the flat roof construction the storm prevention element attached to the post is covered by a water-tight covering. The shape of the covering can correspond in a top view in particular to the shape of the storm prevention element. The dimensions of the covering can be (somewhat) greater than the dimensions of the storm prevention element. The covering can be adhered or welded outside of the circumferential edge of the storm prevention element to the surface of the flat roof covering.
The above-cited problem is furthermore solved by a storm prevention element, in particular the flat roof construction of the above-described type constructed as a hold-down disk or hold-down plate with an opening. The opening is surrounded by spring-elastic claws constructed in such a manner that they determine an inner contour of the opening that is adapted to the outer contour of the post to be protected. The storm prevention element is constructed in such a manner that it can be pushed from the free end of the post against the elastic resistance of the claws onto the post, whereas the claws wedge against the post when a force acts in the opposite direction and thus fix the storm protection element in the position reached by that element upon being pushed on. Regarding the advantages, reference is made to the comments about the flat roof construction explained above.
In one embodiment the storm protection element is constructed as a circular plastic disk with a central opening. Other embodiments are elliptical or substantially with a quadratic or rectangular plate shape, optionally with rounded edges. Even embodiments with projecting support feet in stellate form or the like are possible.
The claws holding the storm protection element fast on the post are constructed in another embodiment as projections of a metallic fixing ring that is permanently added into the opening. In other embodiments individual claws are introduced into the disk or the plate or the latter are provided in their assembly opening with claws formed in one piece or with resilient projections with a corresponding action.
Another embodiment provides that the claws enclose an acute angle with the holding plane of the storm protection element at least in sections, in particular in a section at or in the vicinity of their free ends. Here the claws are directed upward relative to the plane of the roof covering so that they bend even somewhat further upward when being pushed onto the corresponding post from its free upper end by the contact with the outer surface of the post and as a result can be pushed onto the post. The free diameter of the opening of the storm protection element that is determined by the ends of the claws in their relaxed state is preferably somewhat smaller than the outer cross section of the post so that in the assembled state of the storm protection element the claws are pretensioned against the post surface and are consequently pressed on it with a certain holding force. This prevents a “flapping” and a slow loosening of the elements. In particular, the angle between the claws and the holding plane is between 5° and 45°, especially between 10° and 30°.
In another embodiment the thickness of the holding-down disk or of the holding-down plate constantly rises from the edge toward the opening, whose shape is therefore a flat truncated cone or a section of a cone. In an alternative embodiment the disk or plate has a thickened area extending around the opening and is gradually offset in the direction of the edge. Embodiments are also possible with individual, substantially radially running reinforcement ribs or also a spirally running reinforcement rib, and the hold-down disk or hold-down plate can basically have a constant thickness over the entire extent.
The above-cited problem is independently solved by a method for producing a flat roof construction of the type described above, wherein a storm protection element of the above-described type is pushed onto at least one part of the posts penetrating the flat roof covering, in particular onto each post. At least one section of each post, which section is in the vicinity of the covering, and of the surroundings of the post can be provided with a watertight covering while covering the storm protection element. The covering can be adhered or welded outside of the circumferential edge of the storm prevention element to the surface of the flat roof covering.

SHORT DESCRIPTION OF THE DRAWINGS

Exemplary embodiments are explained in detail in the following using the drawings.

In the drawings:

FIG. 1 shows a perspective view of a flat roof construction with roof penetrations (ventilating pipes) and different storm protection elements,

FIG. 2 shows a perspective view of an embodiment of the storm protection element according to the invention,

FIG. 3 shows a perspective sectional view of an embodiment of the storm protection element according to the invention,

FIG. 4 shows a perspective view of an embodiment of the storm protection element according to the invention in its position of use on a crash protection of a flat roof.

FIG. 2 to 4 show a storm protection element 13 constructed as a hold-down disk that is circular in a top view and a perspective view or a perspective sectional view. The storm protection element 13 consists substantially of plastic, for example, a polyamide or a similar material and has a central, circular opening 13 a into which a metallic ring 13 b with claw-like projections 13 c is inserted. The projections (claws) 13 c are dimensioned in such a manner that the free inside diameter of the opening 13 a determined by its free ends is somewhat smaller than the outside diameter of a post to be secured. Therefore, the storm protection element can be pushed on the one hand with relatively little expenditure of force without damaging a sealing element jacketing the post or some other jacketing layer but on the other hand is firmly held automatically on the post by the elastic contact pressure of the claws 13 c against the outside surface of the post in the given position. The material and the wall thickness of the metallic ring 13 b (preferably consisting of spring steel) are selected in such a manner that this function is reliably met under normal conditions of assembly and use.
The outer plastic disk 13 d has a graduated shape with an outer ring area 13 d 1 with a constant thickness and a middle area 13 d 2 shape like a truncated cone with a thickness increasing toward the opening 13 a. However, this is only an exemplary embodiment and the disk can also be designed on the whole to be shaped like a flat truncated cone from the outer edge to the opening (that is, with a thickness that constantly increases starting from the edge).
The outside diameter is, for example 80 to 100 mm but can also be greater or smaller as a function of the concrete purpose, and the diameter of the opening 13 a and its free cross section set by the free ends of the claws in the relaxed state depend on the outside diameter of the post to be protected. For the commercially available Sarnabar/Sarnafast-System with the SecuPoint rope attachment posts also known to the person skilled in the art the diameter of the opening 13 a is approximately 16-20 mm. If the cross-sectional shape of a post to be protected or of another penetration of a flat roof should differ from the circular shape, the contour of the opening of the storm protection element and, if necessary, also its outside contour, will also deviate from the circular shape shown in FIG. 2 to 4.
The performance of the invention is not limited to the examples shown and to the emphasized aspects but rather a plurality of modifications are possible that are within the scope of professional action.

Claims

1. A flat roof construction with a flat roof covering and at least one post extending through this covering, wherein a storm prevention element is attached to the post is constructed as a hold-down disk or hold-down plate with an opening that is surrounded by spring-elastic claws in such a manner that these claws determine an inside contour of the opening that is adapted to the outside contour of the post to be secured, and that the storm prevention element can be pushed from the free end of the post against the elastic resistance of the claws onto the post, whereas the claws wedge against the post when a force acts in the opposite direction and thus fix the storm protection element in the position reached by this element upon being pushed onto the post.

2. The flat roof construction according to claim 1, wherein the storm protection element attached to the post is covered by a watertight covering whose shape corresponds in a top view in particular to the shape of the storm protection element and whose dimensions are slightly greater than those of the storm protection element, wherein the covering is adhered or welded outside of the circumferential edge of the storm protection element to the surface of the flat roof covering.

3. A storm protection element of a flat roof construction according to claim 1, constructed as a hold-down disk or hold-down plate with an opening that is surrounded by spring-elastic claws in such a manner that these claws determine an inside contour of the opening that is adapted to the outside contour of the post to be secured, and that the storm prevention element can be pushed from the free end of the post against the elastic resistance of the claws onto the post, whereas the claws wedge against the post when a force acts in the opposite direction and thus fix the storm protection element in the position reached by this element upon being pushed onto the post.

4. The storm protection element according to claim 3, constructed as a circular plastic disk with a central opening.

5. The storm protection element according to claim 3, wherein the claws are designed as projections of a metallic fixing ring that is permanently set into the opening.

6. The storm protection element according to claim 3, wherein the claws enclose an acute angle with the holding plane of the storm protection element at least in sections, in particular in a section at or in the vicinity of their free ends.

7. The storm protection element according to claim 6, wherein the angle between the claws and the holding plane is between 5° and 45°, especially between 10° and 30°.

8. The storm protection element according to claim 3, wherein the thickness constantly increases from the edge to the opening.

9. The storm protection element according to claim 3, with a thickened area that is offset in a graduated manner toward the edge and extends around the opening.

10. A method for producing a flat roof construction comprising: a storm protection element according to claim 3 is pushed and pressed onto at least one part of the posts penetrating the flat roof covering, in particular onto each post, and onto the surface of the flat roof covering.

11. The method according to claim 10, wherein at least one section of each post, which section is in the vicinity of the covering, and of the surroundings of the post are provided with a watertight covering while covering the storm protection element.

12. The method according to claim 10, wherein the covering is adhered or welded outside of the circumferential edge of the storm prevention element to the surface of the flat roof covering.