阅读说明：本技术 用于由金属制成的大面积屋顶覆盖物或护壁板的固定系统 (Fixing system for large-area roof coverings or dado panels made of metal ) 是由 G·卡夫特 于 2019-05-21 设计创作，主要内容包括：本发明涉及一种用于大面积的屋顶覆盖物或护墙板的固定系统。任务在于提供一种固定系统,其在结构上简单地构造、包括少量部件、可快速安装并且适用于高负风荷载。所述固定在竖突的纵向肋条2内进行,所述纵向肋条由竖立的金属板支腿11形成。所述金属板支腿11是弯曲的并且设有凸部13。根据本发明,纵向连续地或仅局部地延伸的T形基杆3设置并固定在竖突的纵向肋条2内。T形基杆3的宽的水平支腿——被称为底脚支腿5——可向下或向上设置。在T形基杆3中在T形基杆3的延伸直至底脚支腿5的垂直支腿中在左侧和右侧构造有凹部6。屋顶元件、金属板或金属板幅材1的金属板支腿11的专门构造的凸部13嵌接到所述凹部6中。这些预成型的凸部13与可设置在中央支腿4处或上的压板9结合形成形锁合连接。这些压板9以适合的方式与基杆头部7形锁合地或例如螺接地固定。压板9成型成,使得压板9跨接并排放置的屋顶元件、金属板或金属板幅材1的金属板支腿11的凸部13。由此借助于T形基杆3(或基部元件)、中央支腿4和压板9形成牢固的形锁合连接。在向上突出的金属板支腿11的上端部处,整个纵向肋条向上利用盖条12封闭地构造。(The present invention relates to a fixing system for large area roof coverings or panels. The object is to provide a fastening system which is simple in construction, comprises a small number of components, can be quickly installed and is suitable for high negative wind loads. The fixing takes place in a vertically projecting longitudinal rib 2, which is formed by upright sheet metal legs 11. The sheet metal leg 11 is bent and provided with a projection 13. According to the invention, a T-shaped base shaft 3 which extends longitudinally continuously or only partially is arranged and fixed in the vertically projecting longitudinal rib 2. The wide horizontal leg of the T-shaped base bar 3, called the foot leg 5, can be arranged downwards or upwards. Recesses 6 are formed in the T-shaped base shaft 3 on the left and right in the vertical leg of the T-shaped base shaft 3 extending up to the foot leg 5. The specially configured projections 13 of the sheet metal legs 11 of the roof element, sheet metal or sheet metal web 1 engage into said recesses 6. These preformed protrusions 13 form a form-locking connection in combination with the pressure plate 9, which may be arranged at or on the center leg 4. The pressure plates 9 are fixed in a suitable manner with the base rod head 7 in a form-fitting manner or, for example, screwed. The press plate 9 is formed such that the press plate 9 bridges the protrusions 13 of the metal plate legs 11 of the roof elements, metal plates or metal plate webs 1 placed side by side. A firm form-locking connection is thereby formed by means of the T-shaped base rod 3 (or base element), the central leg 4 and the pressure plate 9. At the upper end of the upwardly projecting sheet metal leg 11, the entire longitudinal rib is closed off upwardly by a cover strip 12.)

1. A fixing system for large-area roof coverings or panels made of metal for fixing flat roof elements, metal sheets or metal sheet webs that can be arranged next to one another on a roof or wall substructure,

wherein the roof elements, metal sheets or metal sheet webs are configured flat, undulated or profiled in the form of a sheet and are fixed by means of vertically projecting longitudinal ribs which are formed by standing metal sheet legs and which are configured to run parallel to one another or obliquely over the roof covering or wall panel,

it is characterized in that on the roof or wall substructure, a T-shaped base bar (3) extending longitudinally is arranged and fixed in a vertically protruding longitudinal rib (2),

recesses (6) are formed in the T-shaped base shaft (3) on the left and right in the central leg (4) which extends as far as the foot leg (5),

the convex part (13) of the sheet metal leg (11) of the roof element, sheet metal or sheet metal web (1) engages in the concave part (6),

the pressing plate (9) is fixed on the central supporting leg (4),

wherein the press plate (9) bridges the bulges (13) of the sheet metal legs (11) of the side-by-side roof elements, sheet metal or sheet metal webs (1) and

the sheet metal leg (11) is closed at the end upwards along the longitudinal rib (2) by a cover strip (12).

2. Fixing system for large-area roof coverings or dado panels according to claim 1, characterized in that the size and shape of the protrusions (13) in the sheet metal legs (11) correspond to the size and shape of the recesses (6) in the centre leg (4) and the foot leg (5) of the T-shaped base rod (3).

3. Fixing system for large-area roof coverings or dado panels according to claim 1 or 2, characterized in that the two recesses (6) in the center leg (4) and foot leg (5) are constructed symmetrically.

4. Fixing system for large-area roof coverings or dado panels according to claim 1, 2 or 3, characterized in that the two recesses (6) in the center leg (4) and foot leg (5) are configured dovetail-shaped, oval or circular in cross section.

5. Fixing system for large-area roof coverings or dado panels according to claim 1 or 2, characterized in that a reinforcement bar (14) is additionally provided in the projection (13) of the sheet metal leg (11).

6. Fixing system for roof covering or dado panels for large areas according to claim 5, characterized in that the size and cross-sectional shape of the reinforcement bar (14) matches the size and cross-sectional shape of the protrusions (13) of the sheet metal legs (11) and the pressure plate (9).

7. Fixing system for large-area roof coverings or dado panels according to claim 1, characterized in that the pressure plate (9) fixed on the center leg (4) is fixed screwed with the base rod head (7) at a suitable distance by means of a head screw (10).

8. Fixing system for large-area roof coverings or dado panels according to claim 1, characterized in that the T-base bar (3) is fixed alternately or in pairs with a roof or wall substructure by means of base screws (8).

9. Fixing system for large-area roof coverings or dado panels according to claim 1, characterized in that the T-shaped base rod (3) and/or the press plate (9) are constructed as profiled rails.

10. Fixing system for roof covering or wall panels for large areas according to claim 1, characterized in that the cover strip (12) and the sheet metal leg (11) are connected by means of a form-locking hem connection.

11. Fixing system for large-area roof coverings or dado panels according to claim 1, characterized in that the T-base bar (3) and the pressure plate (9) are arranged exchangeably and both are fixed with the roof or wall substructure by means of a centrally penetrating fixing screw (15).

12. Fixing system for large-area roof coverings or dado panels according to claim 1, characterized in that the reinforcement bar (14) is made of stainless steel, aluminium, plastic or of a rubber material.

13. Fixing system for large-area roof coverings or dado panels according to claim 1 or 12, characterized in that the reinforcement bars (14) are made of different materials.

14. Fixing system for large-area roof coverings or dado panels according to claim 1, 12 or 13, characterized in that the reinforcing bar (14) is configured with linearly, spirally or punctiform arranged protrusions (17).

15. Fixing system for large-area roof coverings or dado panels according to claim 1, 12 or 13, characterized in that instead of inserted reinforcing rods (14) a continuous rope or a rope under tension is pulled into the bulge (6) and then set loose.

Technical Field

The invention relates to a fastening system for large-area roof coverings or siding made of metal for fastening flat roof elements, metal sheets or metal sheet webs that can be arranged next to one another on a roof or wall substructure, wherein the roof elements, metal sheets or metal sheet webs can be of flat, corrugated or profiled sheet form.

Background

In the case of laid, side-by-side sheet metal webs or large-area roof panels made of sheet metal for roof coverings or siding, on the one hand, fixing devices which penetrate the roof covering should be avoided, but on the other hand there is a risk that the roof covering needs to be reliably fixed to the supporting substructure located therebelow due to the suction effect caused by strong gusts of wind or hurricane-like storms. However, the individual adjacent roof metal sheets must be able to cover the sometimes very large, differently inclined and differently curved roof or wall surfaces without play. In certain roof shapes, this suction effect in the respective areas may be additionally enhanced due to the arching alone. Alternating changes between positive and negative wind loads and temperature fluctuations bring additional loads. The requirements for roof fixing are to control the influence of positive wind load (pressure), negative wind load (tension), expansion upon heating and contraction upon cooling (thrust and shear) and nevertheless ensure tightness. Thus, a construction and laying method has been implemented in which individual sheet metal webs or sheets are held on the roof cladding of a roof or wall substructure along longitudinal ribs spaced apart from one another. A series of different roof fastenings are known, in which, for safety reasons, fastening devices are used which penetrate the roof cladding at different locations, spaced apart from one another, which will lead to sealing problems of such roof or wall coverings in the early or late course. This is therefore unsuitable for many roof and wall constructions and requires high maintenance expenditure. Thus, roof and wall coverings that do not penetrate roofs are preferred. For this reason, holders of different designs, which are arranged on the inside, are usually used for fixing, which should reliably fix the roof cladding. These holders are arranged at a specific distance from one another, depending on the type of construction. Here, one sheet metal web overlaps the next sheet metal web to enable tightness.

From EP0530483a1, a solution is known in which a roof is covered by means of profiled sheet metal webs arranged side by side, wherein one adjacent sheet metal web overlaps the next sheet metal web in the same direction on one side along longitudinal ribs configured upwards. The sheet metal web is held on the roof substructure by different curved folds which are fixed in an interlocking manner in hook-shaped holders to ensure sufficient fixing. Such fixing solutions are however conditioned on differently preformed sheet metal webs. Hook-shaped holders are used for fixing, said holders being fixed to the support substructure. As is commonly common, a hook-shaped retainer is threaded with the substructure. The hook-shaped holder can be shaped differently here. However, in such fastening means, only a purely positive fastening between the sheet metal web and the internally located, screwed retaining element is always possible. However, due to the various forces, the form-locking connection may bend over a longer period of time and become so weak that the individual sheet metal webs may be completely lifted in a hurricane.

EP204123B1 describes a modular system for wall structures, in which plate-like facade structures can be snapped into holding elements and at each plate-like element flanges are provided at a certain angle on the left and right, the free ends of which are configured to be curved, so that at the ends projections are produced, which engage in recesses of the holding elements. The retaining element is threadedly engaged with the sub-structure. This solution has the disadvantage that such a form-locking connection can only withstand high negative wind loads to a limited extent and, in addition, such a facade structure is not waterproof.

Another roof covering formed from metal sheet webs placed side by side, which are connected to one another on both sides in an assembled manner via formed longitudinal ribs and are also sealed thereby, is described in DE19941510 a 1. For fixing, so-called retaining strips are screwed to the roof substructure. On the left and right sides of the holding strip, there are provided vertically projecting hooks, the head parts of which are bent in a hook-like manner to one side. The metal sheet web has vertical projecting longitudinal ribs on the left and right sides. One side of the sheet metal web engages the hook from below, while the other side also encompasses the head part in the form of a hook and the longitudinal rib engaging below and also thereby establishes a form-locking connection. A purely positive connection is also disadvantageous here, since it is not durable for a long time and is also not a reliable fastening that can withstand high loads.

In another roof fixing according to US 2009/0094921 a1, a fixing system is also described in which the fixing to the roof substructure via the longitudinal ribs of the upstands is carried out by enclosing the ends of the upstands of the sheet metal legs of adjacent so-called tiles around each other and forming upstanding flaps. In order to prevent the form-fitting connection from spreading apart under load, a clamp is fastened, which exerts a clamping action. It is problematic here that this type of fixing system does not sufficiently stabilize and fix the tiles (sheet metal webs) because they are fixed only at the upper end of the standing seam and the tiles may therefore easily bend under various forces. The roof cladding can be locally deformed significantly.

Disclosure of Invention

The object of the invention is to provide a fastening system for large-area roof coverings or siding made of metal for fastening flat roof elements, metal sheets or metal sheet webs that can be arranged next to one another on a roof or wall substructure, which is simple in construction, comprises a small number of components, can be quickly installed and is suitable for high negative wind loads.

According to the invention, this object is achieved by the features of claim 1. Other advantageous embodiments of the invention are the subject matter of the other dependent claims cited back. The fastening system according to the invention for large-area roof coverings or wall panels made of metal is suitable for fastening two or any number of flat roof elements, metal sheets or metal sheet webs that can be arranged next to one another on a roof or wall substructure, wherein the roof elements, metal sheets or metal sheet webs 1 can be configured differently, for example flat or corrugated or profiled in shape. The fixing takes place in a vertically projecting longitudinal rib 2, which is formed by sheet metal legs 11 standing on the side. These sheet metal legs 11 are preferably bent vertically, but other angles (obtuse or acute) are also conceivable. The longitudinal ribs 2 can run parallel to one another or at an angle to one another over the covering and be distributed over the roof covering or the wall panel. According to the invention, a T-shaped base rod 3, which extends longitudinally continuously or only partially (then called base element) on the roof or wall substructure, is arranged and fixed in the vertically protruding longitudinal rib 2. The wide horizontal leg of the T-shaped base bar 3 (or base element), called foot leg 5, can be arranged upwards or downwards. Recesses 6 are formed in the T-shaped base shaft 3 on the left and right in the vertical leg (referred to as center leg 4) of the T-shaped base shaft 3, which extends as far as the foot leg 5. The specially configured projections 13 of the sheet metal legs 11 of the sides of the roof element, sheet metal or sheet metal web 1 engage into the recesses 6. The preformed projection 13 forms a form-locking connection in combination with the pressure plate 9, which can be arranged at or on the center leg 4. The press plates 9 are usually arranged multiply at a certain distance from one another. But it can also be constructed as a continuous rod-shaped press plate 9. The pressure plate 9 is fixed in a suitable manner with the base rod head 7 in a form-fitting manner or, for example, screwed. But it is also possible to use an interlocking connection for a specific roof covering. The press plate 9 is shaped such that the press plate 9 bridges the protrusions 13 of the metal plate legs 11 of the roof elements, metal plates or metal plate webs 1 placed side by side. A firm form-fitting connection is thereby formed by means of the T-shaped base rod 3 (or, when it is arranged distributed piece by piece, can be referred to as base element), the central leg 4 and the pressure plate 9. At the upper end of the sheet metal leg 11 of the upwardly projecting side, the entire longitudinal rib is closed off upwardly by a cover strip 12.

A particularly firm, permanent form-locking connection between the roof element, sheet metal or sheet metal web 1 and the T-shaped base rod or T-shaped base element 3 together with its central leg 4 and foot leg 5 is achieved in a fastening system for large-area roof coverings or panels if the size and shape of the projection 13 in the sheet metal leg 11 corresponds to the size and shape of the recess 6 in the central leg 4 and foot leg 5. The size and shape of the pressure plate 9 also preferably matches the size and shape of the projections 13.

It is particularly advantageous that in a fastening system for large-area roof coverings or panels, the two recesses 6 in the center leg 4 and the foot leg 5 are constructed symmetrically. The roof element, sheet metal or sheet metal web 1 can then be identically (also symmetrically) bulge-formed on the left and right side with the upright prefabricated bulge 13 and the sheet metal leg 11. This already brings significant time and cost advantages in the manufacture of pre-formed roof elements, metal sheets or metal sheet webs 1. Furthermore, the installation location is therefore not predetermined, which in turn brings advantages when installing roofs or walls on site.

In a fixing system for large-area roof coverings or panels, different shapes of the recess 6 and the mating projection 13 can be used advantageously. Thus, the two recesses 6 in the central leg 4 and the foot leg 5 can be configured dovetail-shaped or oval or circular in cross section, while taking into account the shape of the pressure plate 9 in the pressure region.

The safety against negative wind loads can be significantly increased in a simple manner if, in the fixing system for large-area roof coverings or panels, reinforcing rods 14 are additionally provided in the projections 13 of the sheet metal legs 11. These reinforcing rods 14 are pushed into the projections 13 at the sides or have been previously inserted. The cross section of the reinforcing rod 14 preferably matches the cross section of the projection 13. This prevents the roof element, the metal sheet or the metal sheet web 1, which is relatively thin-walled and is made of metal sheet, from being able to deform over time due to the forces acting and losing the form-locking connection. But it is also conceivable that the cross sections differ from each other. Thus, for example, a triangular or quadrangular cross section of the reinforcing bar 14 is also conceivable. The reinforcing rod produces a force-locking connection which cannot automatically disengage itself. Furthermore, the reinforcing rods 14 have the effect of significantly improving the stability of the entire roof between the longitudinal ribs 2. Hardly any deformation will occur in the entire roof cladding. In practice, the roof cladding is mechanically fixed and clamped directly to the roof and wall substructure and permanently maintains its position and shape relative to the roof substructure, since the form-locking connection does not bend.

The form-locking connection is the most reliable and stable in the fixing system according to the invention for large-area roof coverings or panels if the size and cross-sectional shape of the reinforcing rods 14 exactly match the size and cross-sectional shape of the projections 13 of the sheet metal legs 11 and also exactly match the cross-sectional shape of the recesses 6.

In the case of fastening systems for large-area roof coverings or wall panels, instead of a positive-locking connection of the pressure plate 9 to the base shaft head 7, the pressure plate 9 fastened to or on the center leg 4 can also be fastened in a force-locking manner at a suitable distance to the base shaft head 7 by means of head screws 10, which are introduced at a specific distance depending on the load.

For strength reasons, in fixing systems for large-area roof coverings or panels, the T-base rods 3 or the T-base elements 3 can be fixed alternately or in pairs with roof or wall substructures by means of correspondingly dimensioned base screws 8.

Advantageously, in the fixing system for large-area roof coverings or panels, the T-base bar 3 and/or the press plate 9 are configured as profiled rails. The T-base rod 3 or the pressure plate 9 can be provided with gaps as desired in sections or extend continuously, i.e. without gaps, over the entire roof extension for strength and stability reasons.

In order to provide a reliable seal against weather influences, in particular against any moisture, in the case of fastening systems for large-area roof coverings or wall panels, the cover strip 12, which is continuous above the longitudinal ribs 2, is connected to the sheet metal legs 11 by means of a form-fitting flanged connection.

For a specific wide longitudinal rib configuration, in the fixing system according to the invention for large-area roof coverings or wall panels, the T-base rod 3 or the T-base element 3 and the pressure plate 9 can be exchanged in terms of their position and can be fixed to the roof or wall substructure by means of a centrally penetrating fixing screw 15.

The reinforcing rods 14 may alternatively be made of stainless steel, aluminium or a different plastic or even a rubber material or a fabric composite in a fixing system for large area roof coverings or panels, depending on the type of construction and the material of the respective roof covering.

It may also be expedient for the additional reinforcing rods 14 to be made of a different material in the fastening system for large-area roof coverings or wall panels. For example, the plastic circumferential sleeve can compensate for differential expansion and friction between the reinforcing rods made of metal and the metal sheets of the roof covering.

In order to prevent the reinforcing rods 14 from slipping out of the elevations 13 in the fixing system, in particular in the case of steep large-area roof coverings or vertical wall panels, the reinforcing rods 14 can be constructed with projections 17 which are arranged linearly, helically or in a punctiform manner. This results in a poking into the surface inside the convex part of the respective roofing material.

In a fixing system for large-area roof coverings or panels, instead of inserted reinforcing rods 14, continuous cables can also be pulled into the projections 13. These continuous cables can be tensioned at the ends, if necessary, and the entire roof cladding can thus be constructed and fixed separately to the roof or wall structure. Furthermore, the rope can also be pulled in under tension (stretched), wherein in the case of such a rope, after relaxation, the cross section becomes larger again and completely fills the space of the bulge 6. Both steel cord designs and other durable weather resistant rope designs are suitable for this purpose. Thus, for example, the rope may be made of a plastic material or carbon fiber, which may additionally also be impregnated with a curable synthetic resin.

The fastening system according to the invention for large-area roof coverings or panels made of metal ensures a reliable, stable, storm-proof fastening of planar roof elements, metal sheets or metal sheet webs 1 which can be placed side by side and also an absolute seal against any weather influences, whether on most differently sloping and curved roofs or on sloping, vertical or suspended wall structures, by means of the vertically projecting longitudinal ribs 2. The fastening system comprises a small number of structurally different individual elements, is cost-effective, can be quickly installed and can be designed for very high negative wind loads. Furthermore, the different tensile and shear forces which are not negligible in large coverings, for example due to thermal expansion, are reliably compensated without damage.

Drawings

The invention is explained in more detail below with reference to fig. 1 to 4 by way of example. In the drawings:

fig. 1 shows a cross section of a fixing system according to the invention in a longitudinal rib 2, wherein T-shaped base rods 3 are screwed in pairs on a roof or wall substructure (not shown);

FIG. 2 shows the fixation system with inserted reinforcement rods 14;

fig. 3 shows a fixing system in which a pressure plate 9 is screwed with a specially constructed base element head 7;

fig. 4 shows a wide, transposed embodiment, in which the T-shaped base rod 3 is screwed through and arranged above and is fixed by means of reinforcing rods 14 inserted in pairs and projections 17 provided on the reinforcing rods.

Detailed Description

Fig. 1 shows a cross section of a preferred embodiment of the fastening system according to the invention in the longitudinal rib 2, wherein the T-base bar 3 is screwed symmetrically in pairs on a roof or wall substructure, not shown, by means of two base screws 8. The base shaft head 7, which is the end seal of the central leg 4 of the T-shaped base shaft 3, is complementary to a connecting groove provided with a T-shaped undercut in the pressure plate 9 and is likewise configured T-shaped. The T-base 3 is screwed down with its wide upper beam to the roof or wall substructure. The wide upper beam forms left and right foot legs 5 which are concavely formed in a substantially semicircular shape. The central leg 4 is straight and the base shaft head 7 is T-shaped. Instead of a T-shaped connection between the base shaft head 7 and the pressure plate 9, a dovetail connection can also be provided, for example. This has advantages during installation, since the pressure plate 9 is pushed laterally onto the base rod head 7. Approximately semicircular recesses are also formed downward in the pressure plate 9 on the left and right sides of the connecting groove. In this way a substantially oval recess 6 is created. After the T-base bar 3 has been fixed on the roof or wall substructure by means of the base screws 8, two pre-formed roof elements, metal plates or metal plate webs 1 are inserted into the T-base bar 3 on the left and right side. The roof element, the metal sheet or the metal sheet web 1 is provided with a substantially oval projection 13, which is here constructed connected to the double bend. This is advantageous in that both flat parts of the left-hand and right-hand roof elements, metal sheets or metal sheet webs 1 can rest as completely as possible on the roof or wall substructure.

Typically this is a beam, brace or bracing structure, as such roof coverings are not laid over the substructure over the full surface. The shape and position of the projections 13 correspond in their dimensions and cross-section to the dimensions and cross-section of the recesses 6. The roof element, the metal sheet or the metal sheet web 1 transitions laterally upwards into the vertically standing metal sheet legs 11. When the roof element, metal sheet or metal sheet web 1 is inserted into the T-shaped base rod 3 or base element, the press plate 9 is pushed onto it in a suitable manner from the side. If the roof element, the metal sheet or the metal sheet web 1 is now fixed in the longitudinal rib 2, finally a continuous cover strip 12 is mounted above by means of a hem on the upper end of the metal sheet leg 11. This is done mechanically with a suitable flanging machine. The longitudinal ribs 2 are thereby weather-resistant and permanently and mechanically securely fastened to the roof or wall substructure.

As already described above in fig. 1, a similar embodiment of a fastening system for large-area roof coverings or panels made of metal is shown in fig. 2. But now additionally the reinforcing rods 14 are inserted or pushed into the projections 6 on the left and right. It can be sufficient for a specific design of the roof covering to insert or push in the reinforcing rods 14 on one side only. These reinforcing rods 14 are designed here substantially oval and correspond in their dimensions and cross section to the elevations 13 of the roof element, the metal sheet or the metal sheet web 1. Thereby significantly improving structural strength. Depending on the dimensioning of the reinforcing rods 14, the mechanical stability can be adjusted at will in the region of the stable roof or wall substructure below by pre-inserting or subsequently pushing in correspondingly larger or smaller cross sections. The safety against negative wind loads is thus significantly improved. Preferably the cross section of the reinforcing rods 14 matches the cross section of the protrusions 13. This prevents the relatively thin-walled roof elements, metal sheets or metal sheet webs 1 from being deformed over time by the action of force and losing the form-locking connection. A permanent, force-locking connection is formed directly in the region of the flat roof cladding (roof tiles) by the reinforcing rods 14.

Fig. 3 shows a fastening system for large-area roof coverings or wall panels made of metal for fastening flat roof elements, metal sheets or metal sheet webs 1 which can be arranged next to one another, in an embodiment in which a pressure plate 9 is screwed to a base element head 7 which is specially designed for screwing. All other design details correspond to the technical design already described in fig. 1. The base shaft head 7 is here specially reinforced and enlarged and is provided with a cavity inside, so that the pressure plate 9 is here connected to the T-shaped base shaft 3, for example simply by means of a self-tapping head screw 10, via the center leg 4. The base rod is in turn fixed in the not shown roof or wall substructure by means of two self-tapping base screws 8 in pairs. Such an advantageous embodiment enables a faster installation on site, since the pressure plate 9 does not have to be pushed in from the side, but can be placed from above and screwed in.

A wider embodiment of a securing system for large area roof coverings or panels is shown in fig. 4. In contrast to the arrangement described so far, the T-base shaft 3 and the pressure plate 9 are arranged in a transposed manner, i.e. the pressure plate 9 is arranged directly underneath on the roof or wall substructure. The preformed roof element, metal plate or metal plate web 1 is then placed with the reinforcing rods 14 already inserted beforehand, and the T-base rods 3 are then inserted from above and screwed with the pressure plates 9 arranged therebelow with the aid of through-going fixing screws 15 to the roof or wall substructure. In order to improve the stability of such a wide roof covering embodiment, two reinforcing rods 14 are inserted here again on the left and right side. They can also be pushed in afterwards, but are usually already inserted before the T-shaped base rods 3 are placed and fixed in the protrusions 6 of the roof element, metal sheet or metal sheet web 1. Thus, negative wind loads or other forces do not cause any deformation of the roof cladding and roof tiles. The reinforcing rods 14, which are made of two materials here, are provided with individual projections 17, which dig into the material of the roof element, the metal sheet or the metal sheet web 1 and permanently prevent the reinforcing rods 14 from slipping.

The above-described technical solution can be used primarily as a fastening system for large-area roof coverings or wall panels made of metal for fastening flat roof elements, metal sheets or metal sheet webs that can be arranged next to one another on a roof or wall substructure.

List of reference numerals

1 roof elements, metal sheets or metal sheet webs

2 longitudinal rib

3T-shaped base rod, base element

4 center leg

5 footing supporting leg

6 concave part

7 base rod head

8 base screw

9 pressing plate

10 head screw

11 metal plate supporting leg

12 cover strip

13 convex part

14 reinforcing bar

15 penetrating fixing screw

16 hem connection

17 projection