WO2003035999A1

WO2003035999A1 - Device for a rear-ventilated façade and method for producing said device

Info

Publication number: WO2003035999A1
Application number: PCT/EP2002/011232
Authority: WO
Inventors: Alfons HÖRMANN
Original assignee: Creaton Ag
Priority date: 2001-10-19
Filing date: 2002-10-08
Publication date: 2003-05-01
Also published as: DE10152717B4; DE10152717A1

Abstract

The invention relates to a rear-ventilated façade, which comprises a supporting metal double U profile which extends vertically when mounted, a center back which extending from the transverse base of the double U profile projects forward, and two lateral walls that extend in parallel and that have hooks that are open towards the top and that project beyond the lateral walls. The center back (13) has an acute, approximately V-shaped cross-section and its back faces (19, 21, 31) consist of a thin sheet metal. In its terminal sections (32, 33) the back faces verge into one transverse base half (14, 16) each. Said transverse base halves (14, 16) are identical in shape, namely they are planar strips and are aligned in the transverse direction. The strips (14, 16) are bent upward in their outer terminal sections to give lateral walls (17, 18) that are provided with the hooks (39, 41).

Description

Device for a ventilated facade and method for producing this device

The invention relates to a device according to the preamble of claim 1 and claims 18 and following as method claims.

According to its own older German patent application 101 29 824.2, the device consists of an extruded double U-profile made of aluminum. However, the price of aluminum is very high. The extrusion machines for aluminum are expensive and complicated. The characteristics of such profiles as section modulus and moment of inertia can be improved. Bent aluminum parts are difficult to straighten. Aluminum alloys suitable for prestressing have a high coefficient of thermal expansion. In those devices, the hooks and the spaces between them must be created by notching the upstanding side wall. This means additional effort. Accuracy can also suffer if the left and right notching tools are offset in height. As the human eye is extremely sensitive to the non-linear course of edges - here with the facade panels - the notching tools must be adjusted with great precision and must also keep this adjustment. To be achieved in the field of the invention The tolerances are 0.1 mm, although the facade technology is assigned to the construction sector. Often, it is only possible to see whether the adjustment has been lost after the device has been completed. Since aluminum is expensive, attempts are made to save on the width of the devices, with the result that the suspension hooks are comparatively close to one another and accordingly support the facade panels closer to the edge areas. Since alignment work is necessary, care must be taken to ensure that the middle back does not project further than the hooks. However, this is unfavorable for the moment of inertia and the section modulus, because these values derive their size primarily from the middle back.

The object of the invention is to provide a practical device of the type mentioned, which - manufactured in a simple manner - enables precise and manageable geometries, in particular with the hooks, nevertheless determines the vertical gap of the facade panels, prevents the facade panels from wind or other Vibrations rattle and which does not require a fundamental rethinking of the installation specialists.

According to the invention, this object is achieved by the features evident from the characterizing part of claim 1. Although "facade panels" are preferably meant here with a coarse ceramic or fine ceramic nature. However, they can also consist of metal, plastic, stone, concrete, earthenware, stoneware, glass, wood, pressboard or the like. These can also be fiber-reinforced, e.g. B. with mineral, organic, metallic fibers or the like.

With regard to the method, claim 18 shows the way.

Due to the features of the characterizing part of claim 1, a device is obtained which can be produced by simple bending processes and which has a very resilient center back, by the shape of which the hooks move further outward from the geometric center plane. Thin sheet can be punched more easily than a similar construction, for example by injection molding. The hooks sit exactly and easily at the same height (in pairs) and have the same shape. A production control is easily possible. Due to the features of claim 2, the middle back remains stiff. A technically simple curve of the central back shape is possible.

The features of claim 3 achieve the greatest possible radius, prevent injury, create a very rigid area that is also easy to manufacture and can also use the radius when hanging as a positioning aid when hanging the facade panels.

Due to the features of claim 4, the simplest to produce radius shape is achieved, which does not require any complicated tools.

Due to the features of claim 5, an easily attachable hex (bend) is achieved so that there is no risk of buckling and can nevertheless be achieved in a linear manner across the entire device without the need for special tools.

Due to the features of claim 6, simple machining is achieved, in itself flat surfaces, which are accordingly easier to calculate and have very good static and dynamic properties.

Due to the features of claim 7, relatively low coefficients of thermal expansion are achieved, requires no special tools, can rely on known manufacturing techniques, has the same sheet thicknesses everywhere, because the steel sheet itself has the same thickness, less others are available ^ Independently available sheet types, save money and have a high fire resistance.

The features of claim 8 ensure that the steel sheet has a very long life. Possibly. The corrosion protection layer can also be colored, so that the region of the dome 28 which is visible in the assembled state can contribute to the color harmony. Possibly. this area can also be color coated.

The features of claim 9 give a protective layer which has very many ^{types of} sheet metal anyway. The galvanizing of the Sendzimierschutz- layer ^" entails that a cathodic edge protection is created, so that the cut edges do not corrode despite punching work. Due to the features of claim 10 you have a simple way to prevent the clattering of the facade panels, so that although the hooks for the hanging rails of the facade panels offer space, the resulting game is controlled.

Due to the features of claim 11, the securing tongues can be made in one piece with the complete double U profile, so that the riveting of securing tongues or other special measures can be omitted.

The features of claim 12 also achieve that a downward force component prevents the facade panels from moving upwards - however small.

The features of claim 13 further improve the measures according to claim 11.

Due to the features of claim 14, the securing tongues can also be punched out in the flat state and remain flat even in the position of use. Such a shape is also favorable for releasing the locking effect by means of a special tool.

The features of claim 15 achieve that the locking tongues exert their force in the area in which the hooks also carry the facade panels.

Due to the features of claim 16 it is achieved that the transverse base halves have a comparatively large distance, so that they are attached further down in the course of the double U-profile. In addition, you can achieve a wide central back with appropriate rigidity and comparatively far hooks.

Due to the features of claim 17, the height and the distance of the hooks and the securing tongues and other components can be guaranteed in a simple manner, with a simple tool and in a manageable manner.

Due to the features of claim 18, the device according to the invention can largely be produced on simple edge banks, which is not too large Quantity is very cheap. This method is particularly preferred when working with thin sheet metal. Roll forms are also possible.

Due to the features of claim 19, a method is used which brings a great deal in particular in the production on the basis of coil strips and in large quantities.

The features of claim 20 make it possible to produce a good product with a comparatively thin corrosion protection layer.

By the features of claim 21 it is achieved that post-coating is not necessary. It is also achieved above all that cathodic cut edge protection occurs, as is possible, for example, on the basis of zinc or aluminum-zinc protective layers.

A preferred exemplary embodiment of the invention is described below. The scale drawing shows:

1 shows a cross section along the line 1-1 in Figure 2

Figure 2: the side view of Figure 1 according to arrow 2

Figure 3: a view according to arrow 3 in Figure 1

FIG. 4: a bottom view according to arrow 4 in FIG. 1

Figure 5: the top view of a punched out, flat sheet metal piece before its further deformation, i.e. a view similar to Figure 3, but without the manufacturing step of bending.

Figure 6: a schematic diagram with dimensions in millimeters and the reference point circle to which the moments of inertia refer.

A double U profile 11 is made of a steel sheet in the area around 0.9 mm thick. It is galvanized on both sides. The double U-profile 11 is symmetrical to a geometric center plane 12 perpendicular to the plane of the drawing in FIG. 1. It comprises a central back 13 and an approximately V-shaped cross section. Together with two transverse base halves 14, 16 and two outer side walls 17, 18, this essentially forms the double U profile 11. The central back 13 has two mutually parallel legs 19, 21 which, as shown in FIG. 1, merge upwards into a radius 22 whose center lies in the geometric center plane 12. The Distance between the outer surfaces 23, 24 of the legs 19, 21 corresponds to the desired joint width of the suspended facade panels.

The outer surfaces 23, 24 extend to a bend 26, 27, which is very obtuse at about 20 °, so that when you look at the double U-profile 11 superficially, it is initially not noticeable. The bend 26, 27 is located approximately where, in the suspended state of the facade panels, their transverse strips attached to the rear end endeji. The lateral displacement limitation of facade panels thus occurs at least essentially according to FIG. 1 above the bends 26, 27. The lavish construction of the facade panels themselves extends further upwards (in the assembly position to the front) than the crests 28 of the radius 22.

According to FIG. 1 downward - on the right or left - the central back 13 is supplemented by two otherwise flat leg walls 29, 31. The opening angle of the leg walls 29, 31 is approximately 30 °. In the exemplary embodiment, the central back 13 has no recesses which at least substantially weaken its section modulus, its moment of inertia and its area.

The transverse base halves 14, 16 are perpendicular to the geometric center plane 22. They each connect to the leg wall 29, 33 with a radius 32, 33. This radius 32, 33 - like all other radii - is kept so that no material cracks occur during profiling. The side walls 17, 18, which run at a distance and parallel to the geometric center plane 12, adjoin the transverse base halves 14, 16 according to the same radius. The upper edge 34, 36 of the side walls 17, 18 is straight and continues linearly, only interrupted by roots 37, 38 of the right hook 39 and left hook 41. It can be seen from FIG. 5, which is still to be discussed, that the upper edges 34, 36 lie parallel to the geometric center plane 12 in the plane of the drawing.

The hooks 39, 41, which according to FIG. 2 are open at the top, protrude above the upper edges 34, 36, upward in FIG. 1 and forward in the assembled state. Their outer contour 42, 43 extends approximately as high as the transition regions of the radius 22 into the legs 19, 21. However, the outer contours 42, 43 also do not protrude so deeply that they are aligned with the leg walls 29, 31 perpendicular to the geometric center plane 12 would. All hooks 39, 41 have a congruent outline, are open at the top in the assembled state of the device and are designed with their hook recess 44 in such a way that the transverse strips attached to the back of facade panels are supported there, easy to find during assembly and allow little play ,

The right hooks 39 and the left hooks 41, with a distance perpendicular to the geometric center plane 12 of 7 cm, have a larger distance than was previously the case. As a result, they support the facade panels further away from their edge, so that there is more secure support. The greater distance stems from the central back 13, which is not substantially in the central plane 12, but has an increasing distance to the right and left, so that the transverse base halves 14, 16 also move further away from the geometric central plane 12.

According to FIGS. 1 and 2, the hooks 39, 41 are aligned in pairs on the right and left and are at exactly the same height.

In the viewing direction of Figure 1, the right hook 39 are equidistant. The same applies to the left hook 41.

As can be seen in particular from FIG. 5, but also from FIG. 3, pressure springs 46, 47 protrude from the transverse base halves 14, 16 into the U-profiles. Each hook 39, 41 has a pressure spring 46, 47, the tongue end 48, 49 of which indicates the respective hook head 51, 52. Each tongue end 48, 49 has a sharp edge 53 as a result of the stamping process. If facade panels are hung in, then the pressure spring 46, 47 located under the facade panel was first pressed inwards. The sharp edge 53 is then self-locking when using the known facade panels behind the L-shaped hanging bar, so that the facade panels are both pushed forward in the direction of Figure 1 and thus do not rattle and are also secured against unintentional detachment, since the sharp edge 53 on the back of the L facade panel - which is known per se - burrows. It suffices if it digs in a fraction of a millimeter. The pressure springs 46, 47 are punched out of the cross-base halves 14, 16, remain cohesively connected with their tongue roots 54, 56 to the cross-base half 14 and 16 and need not to be reworked. These punched-out areas produce the rectangular holes 57, 58, which are visible above all in FIG. 4.

Through holes 59, 61 are provided in the transverse base halves 14, 16 and are at exactly the same height. Pen-like connecting means passing through them, e.g. Rivets, dowels, nails or the like, the double U-profile 11 is attached to the substructure of the facade. In the exemplary embodiment, the contact springs 46, 47 are comparatively wide. They can also be made narrower, so that more material of the transverse base halves 14, 16 remains in width.

According to FIG. 5, the device just described is produced from an initially flat sheet metal, be it a sheet metal sheet or a developed coil web. FIG. 5 shows the geometric center plane 12, which here is perpendicular to the drawing plane of FIG. 5. Since the hooks 39, 41 are already present after punching out, there is no need to release the lateral excess of the side wall 17, 18 in the upturned state of the side wall 17, 18, namely up to the upper edge 34, 36 Hooks 39, 41 in pairs exactly at the same height, so that the alignment otherwise required when assembling the double U-profiles of a different shape can take place without straightening battens or lasers. It may therefore also the radius 22 of Figure 1 further upwardly protrude as the outermost perimeter of the respective hook 39, 41. The through holes 59, 61 are thus forcibly ^'at the same height, so that here also the load can be introduced uniformly into the substructure can and the geometric center plane 12, which must be vertical in the fully assembled state, does not deviate from the vertical by a few degrees.

All contact springs 46, 47 can be punched out together. So they always have the same effect when compared to each other. The sharp edges 53 are always exactly where they are to be supported on the transverse strips of the facade panels, even when they are bent up.

Only a few work steps with comparatively simple tools for bending forming are necessary in order to produce a double U-profile of the type described from the preliminary product lying flat according to FIG. The outer surfaces 23, 24 serve as a stop and the vertical edges of the facade panels definitely determine the width of the vertical facade panel gap. When using known facade panels, the crest 28 is in the assembled state in the gap and does not extend beyond the front of the facade panels.

Instead of a steel sheet, other materials can be used. For example, the object according to FIG. 5 can be punched out of light metal sheets, non-ferrous metal sheets or the like, provided the material properties permit bending deformations.

Sheet steel has the advantage over aluminum alloys that the coefficient of thermal expansion is only a third of that of aluminum. These thermal expansion variables can be provided through elongated holes in the transverse base halves 14, 16.

It is also possible to provide a further pair of through holes 62, 63 at the same height, which is offset, for example, 20 cm below the through holes 59, 61, because the thermal expansion of sheet steel can be disregarded over short distances.

The maximum length of the double U-profiles 11 depends on the platform length of trucks and can be, for example, 6-7 m.

The outstanding values that can be achieved by the invention can be seen in FIG. 6, in which the dimensions are given in the "millimeter" dimension. The following values and data result:

Area: 155,6051

Extent: 313.2102

Bounding box: X: -35.0000 - 35.0000

Y: -35.0000 - 0.0000 center of gravity: X: 0.0000

Y: -10.8108 moments of inertia: X: 35991.9849 X Y: 67829.7504

Deviation moment: XY: 0.0000 Radii of inertia: X: 15.2087

Y: 20.8784

Main moments of inertia and X-Y direction around center of gravity:

I: 17805.7800 along [1.0000 0.0000] J: 67829.7504 along [0.0000 1.0000]

Claims

claims

1. Device for a rear-ventilated facade, with a load-bearing, metallic double U-profile running vertically in the assembled state, with a central back that protrudes - starting from a transverse base of the double U-profile - with two side walls, which run parallel to one another, have hooks which are open at the top, the hooks projecting beyond the side walls, characterized by the following features: a) The central back (13) has an acute-angled, approximately V-shaped cross section. b) Its back sides (19, 21, 31) are made of sheet metal, which extend in their Endbe (32, 33) into a transverse base half (14, 16). c) The transverse base halves (14, 16) have the same shape, are flat strips and are aligned in the transverse direction. d) The strips (14, 16) are bent up in their outer end regions to the side walls (17, 18) having the hooks (39, 41).

2. Device according to claim 1, characterized in that the central back (13) in its outer end region (19, 21, 22) has a U-cross section, the legs (19, 21) of the U-cross section running parallel to one another and less are as wide as the back (29, 31)

3. Device according to one or more of the preceding claims, characterized in that the central back (13) in an outer end region have a radius (22) corresponding to the distance between the legs (19, 21) of the U-cross section.

4. The device according to claim 4, characterized in that the radius (22) is a semicircle.

5. The device according to one or more of the preceding claims, characterized in that the end regions of the U cross-section merge with a very obtuse, linear bend (26, 27) in each of a central back region (29, 31).

6. The device according to claim 5, characterized in that these central back areas (29, 31) are flat.

7. The device according to claim 1, characterized in that the thin sheet is a steel sheet.

8. The device according to claim 7, characterized in that the steel sheet carries a corrosion protection layer on both sides.

9. The device according to claim 8, characterized in that the protective layer comprises a Sendzimier zinc protective layer.

10. The device according to claim 1, characterized in that protruding tongues (46, 47) protrude from the transverse base halves (14, 16), which urge the facade panels outwards with their hanging strips into the respective hooks (39, 41).

11. The device according to claim 10, characterized in that the securing tongues (46, 47) on the respective transverse base half (16, 14) are attached.

12. The apparatus according to claim 11, characterized in that the securing tongues (46, 47) are directed at an acute angle downwards and forwards and are bent out of the transverse base halves (14, 16).

13. The apparatus according to claim 11, characterized in that the tongue root (54, 56) is integrally connected to the respective transverse base half (14, 16).

14. The apparatus according to claim 10, characterized in that the securing tongues (46, 47) are flat.

15. The apparatus according to claim 10, characterized in that the end regions (53) of the securing tongues (46, 47) in the region of the hooks (39, 41) are arranged in the upwardly open cross bar receptacle (44).

16. The apparatus according to claim 1, characterized in that the transverse base halves (14, 16) have a clear distance of 1-5 cm to 2.5 cm, preferably a distance of 2 cm + 3 mm.

17. A method for producing a device according to claim 1, characterized in that it is cut out of a flat sheet metal lying together with the outline of the hooks (39, 41) and the side walls (17, 18) (Fig. 5) and then by bending the device is optionally manufactured without the securing tongues (46, 47).

18. A method for producing a device according to claim 17, characterized in that the bending deformation is an articulated bending.

19. A method for producing a device according to claim 17, characterized in that the bending deformation is roll bending, in particular roll profiling.

20. A method for producing a device according to claim 17, characterized in that the bending deformation is crack-free.

21. A method for producing a device according to claim 17, characterized in that thin sheet carries a corrosion protection layer on both sides from the beginning.

22. A method for producing a device according to claim 17, characterized in that the thin sheet is a sheet.

23. A method for producing a device according to claim 17, characterized in that the thin sheet is a wound coil strip.