AU639641B2

AU639641B2 - Cladding

Info

Publication number: AU639641B2
Application number: AU20744/92A
Authority: AU
Inventors: Franz Zambelli
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-08-05
Filing date: 1992-08-03
Publication date: 1993-07-29
Anticipated expiration: 2012-08-03
Also published as: EP0530483B1; DE4125900A1; ATE115223T1; SK280200B6; DE59200903D1; CZ281980B6; CZ242192A3; EP0530483A1; SK242192A3; AU2074492A

Abstract

A roof covering or wall panelling composed of metal sheets (3, 4) placed side by side is presented. The individual metal sheets of the said covering or panelling are equipped along their two longitudinal edges with longitudinal ribs (1, 2) projecting upwards from the plane of the said sheets and preferably provided in each case with head parts reinforced by means of transversely directed reinforcing beads, and the said sheets can be fixed on a load-bearing structure by means of hook-shaped holders (8) which can be fastened on the said load-bearing structure, the longitudinal ribs of directly neighbouring metal sheets at least partially overlapping and, on the one hand to reduce the material expenditure required for the roof covering and on the other hand at the same time to simplify installation, the hook-shaped holders acting on the respectively overlapping longitudinal rib of neighbouring metal sheets. <IMAGE>

Description

A

AUSTRALIA

Patents Act 1990 COMPLETE SPECIFICATION STANDARD PATENT 0 .0 Applicant(s): Invention Title: Franz ZAMBELLI

CLADDING

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The following statement is a full description of this invention, including the best method of performing it known to me/us: v 1 2

CLADDING

The invention relates to cladding and relates particularly but not exclusively to cladding suitable for roofing or walls.

In the case of roofing composed of sheets to be laid adjacent to each other, in particular metal sheets, care must be taken to dispense with the use of any kind of penetrating securi.lg means, i.e. securing means which may pierce the surface of the roof. Further, one must provide for a reliable fixing of the individual sheets both to the support structure and to each other. With regard especially to the extremely high loading forces which act on the roofing under unfavourable conditions such as wind loadings, stable joining of adjacent metal sheets must be V ensured and, in particular, a continuous overlapping and close fitting of the longitudinal edges of adjacent metal 20 sheets must be guaranteed.

The most widely used designs of roofing material have therefore been those in which the metal sheets are provided with cverlapping longitudinal ribs on both longitudinal sides. The sheets are secured to the roof structure by mountings that attach to the longitudinal ribs of the metal sheets. Hitherto there have been generally only two different basic designs. A large number of embodimrents in each case have been suggested, In a first design, known, for example, from Australian Patent 255,260, provision is made for the overlapped longitudinal rib of on a.aal sheet to be overlapped by the hook of a mounting secured to the roof structure and for the adjacent metal sheet to be secured by clamping to the overlapped longitudinal ril- 3 fixed against the roof structure in such a way that the overlapping longitudinal rib of the adjacent metal sheet is clipped on to the head of the overlapped longitudinal rib.

This roofing design has the fundamental disadvantage of inadequate resistance to wind forces acting on it because the overlapped longitudinal rib is flattened, whereby it becomes possible for relatively moderate wind loading forces to roll up and lift the clamp connection between the overlapped longitudinal ribs.

In the second roofing design, known, for example, from German Patent 22 56 584, in order to avoid this deficiency, provision is made for the hook of the mounting to engage with the inner periphery of the head of the overlapped longitudinal rib of one metal sheet and to hold this down against the roof structure and then for the overlapping longitudinal rib of the adjacent metal sheet to be secured exclusively by clamping to the outer periphery of the overlapped longitudinal rib. In this roofing design, the 20 disadvantage of the aforementioned design is indeed avoided and adequate securing forces are also achieved in practice, but here, the securing is effected at least partially only by clamped joints, such as, for example, that in German Patent 1,292,358. The strength of the roofing joint is 25 limited by the level of the clamping forces between the overlapping and the overlapped longitudinal ribs. It must be borne in mind that these clamping forces, with regard to the installability of the roofing, may not be of any arbitrary level, especially as the clipping of the overlapping longitudinal rib to the longitudinal rib beneath it requires considerable time for the installation.

An important characteristic of all known claddings lies in the fact that the metal sheets, in order to achieve an 4adequate stability of securing to the roof structure of the sheet joint, require a third longitudinal rib which is disposed between the two longitudinal ribs. This can be seen, for example from U.S. Patent 3,394,524 or Australian Patent 226,784, and is in each case independent of the design selected.

It is an object of the present invention to attempt to overcome one or more problems of the prior art.

According to one aspect of the present invention there is provided cladding composed of interconnected sheets disposed side by side, the individual sheets of which are provided along their two longitudinal edges with respective longitudinal ribs projecting upwards in relation to the plane of the sheets, the sheets being fixed to a supporting 15 structure by means of hook-shaped mountings that are secured to the supporting structure, the longitudinal ribs of immediately adjacent metal sheets overlapping in such a 00 Goo~way that the longitudinal ribs differ on one side to the other side of each metal sheet so that one longitudinal rib S20 of one metal sheet overlaps the longitudinal rib of the 00 0 adjacent metal sheet facing it, and with the hook-shaped 0 mountings engaging in a form-fitting manner the overlapping longitudinal rib.

00 00 o 0 According to a further embodiment of the present invention 25 there is provided a cladding sheet with a respective o .o longitudinally extending rib on each side, each rib being upstanding from the plane of the sheets, and the rib on one side being shaped different to the rib on the other but such that when a similar sheet is to be interconnected in side by side relation, the rib on one sheet locates over the rib of the other and so that a hook-shaped mounting can be engaged in a form-fitting manner at least the overlapping rib.

In order that the invention can be more clearly ascertained examples of preferred embodiments will now be described with reference to the accompanying drawings wherein:- Figure 1 is a perspective end view of cladding for roofing or other purposes; Figure 2 shows an enlarged detail of Figure 1; Figure 3 is a schematic representation of the installation of the mounting of roofing as in Figures 1 and 2; Figure 4 is a perspective view showing a further example of a mounting; Figure 5 shows an end view of a still further example of a mounting; and the associated profile shapes of the overlapped and overlapping longitudinal rib of the cladding; Figure 6 is an end view showing a labyrinth seal between overlapping and overlapped longitudinal rib of cladding in another embodiment; Figure 7 is a view similar to Figure 6 showing overlapping and overlapped longitudinal rib of cladding in a still :20 further embodiment; and, Figure 8 shows three views A, B, C of different cladding in S. further embodiments.

Referring firstly to Figures 1 and 2 a roof, for example, comprises individual metal cladding sheets 3 and 4 disposed adjacent to each other and provided on each longitudinal S side with a respective alternately arranged overlappable longitudinal ribs I and 2. The sheets 3 and 4 are held to_ oS o *oooS the roof frame 6 by means of a mounting 8 which has a hook which can be secured to a roof frame 6, for example, by means of a screw connection 7. The overlapping longitudinal rib 1 has a generally trapezoidal shaped head 10 delimited by a transverse reinforcement bead 9 disposed on one side, to which, in the embodiment shown is of the same shape as the cross-sectional shape of the hook 5. The free edge region 11 of the head 10 of the overlapping longitudinal rib 1 is flanged inwards of the head 10 and forms a first support for a free arm 12 of the hook 5 of the mounting 8. A second support is formed by the cross piece 15 of the hook 5 which locates against the upper surface of the inwardly directed upper transverse wall 16 of the reinforcement bead 9.

The head 13 of the longitudinal rib 2 is arranged to engage in the hook 5 of the mounting 8. It has an essentially square cross-section and is arranged with an inwardly directed stop section 14 of its free edge on top of the 20 lower crosspiece 15 of the hook 5 of the mounting 8. The transitional area 18 from a flank wall 17 to the head 13 of the overlapped longitudinal rib 2 is curved inwards in such a way that the flanged edge area 11 of the overlapping longitudinal rib 1 is disposed in mated relation thereto.

On assembly of the cladding, as can be seen in particular from the representation in figure 3, a first metal sheet 3 is placed on the roof frame 6 and the hook 5 of the mounting 8 first located in the head 10 of the overlapping rib 1. The mounting 8 is then pivoted and the foot section thereof is then securcd to the roof frame 6 by means of screws 7. The metal sheet 4 which is to be disposed adjacent first sheet 3 is then suspended by its head 13 locating within the hook 5. Thus, the longitudinal rib 2 is held in the hook 5 of the mounting 8, after which installation of the next metal sheet can connect to the opposite side of metal sheet 4, and so on.

In the embodiment shown in figure 4 the i.ng 80 and the hook 50 are moulded and made, for example, by die-casting or injection moulding.

In the embodidment shown in figure 5 the mounting 88 differs considerably in th the hook 55 has an arc-shaped cross-section and this, in use, is associated with an essentially triangular cross-section shape of a head 132 of the overlapped longitudinal rib 2 of a sheet of cladding 4.

A socopd support for the hook 55 is dispensed with as shown by the fsmooth flank wall 20 of the overlapping longitudinal rib 1. Provision is made for a supporting crosspiece for supporting the cladding 4 as a moulded part of the mounting 88.

20 Provision is made in the embodiment shown in figure 6 for the head 13 of the overlapped longitudinal rib to have its upper section 130 with the same trapezoidal cross-section shape as the hook 5 of the mounting 8.

S 25 In the embodiment shown in figure 7, the head 131 of the overlapped longitudinal rib 2 has a cross-section of irregular trapezoidal shape.

Sealing means may be disposed between the transitional region 18 between the flank wall 17 and the head 13 of overlapped longitudinal rib 2 and the flanged edge of the inwardly directed edge region 11. Such sealing means may be either in the form of a labyrinth seal in accordance with the embodiment as shown in figure 6, with the free edge region being inclined to the arc-shaped transitional region 18 at a shallow angle, or, in accordance with the embodiment shown in figure 7, by a sealing strip 22 placed on the free, inwardly extending flanged edge region, 11 of the overlapping longitudinal rib 1.

In figure 8 examples of variations within the scope of the present invention are shown. These show schematically extreme forms of embodiments. Proceeding from the fact that the embodiments allow for a securing of the overlapping longitudinal ribs by means of the hook of the mounting, provision may naturally also be made in a general embodiment for the hook of the mounting to engage with an overlapping longitudinal rib at a point between the foot region of it and a point lying in the head section of it, as can be clearly seen from a comparison of A and B of the figure. It can also be seen from a comparison of A, B and eeo.

C of the figure that the hook of the mounting can be designed and disposed firstly as a simple bent hook which *o 20 does not engage over the head of the overlapped longitudinal rib but so it co-operates with a support formed at one flange of the overlapping longitudinal rib.

S" In this case its securing foot conveniently is directed opposite to the hook curvature, or alternatively so it engages over the head of the overlapped longitudinal rib, i. e as a moulded part with a projection disposed opposite to its free edge and abutting a second support formed by a shoulder produced on the overlapping longitudinal rib.

In some of the embodiments shown it can be seen that certain of the prior art problems have been overcome through the fact that the hook of the mounting engages with the overlapped region of longitudinal ribs. The height of the cross-section of the longitudinal ribs at which the hook engages and how the support to be produced at the longitudinal rib is formed is immaterial. To obtain an optimum stability of the roofing, however, provision may be made, according to one embodiment, for the hook of the mounting to be disposed overlapping the head of the overlapped longitudinal rib and to engage in a form-fitting manner with at least one support formed at the head of the overlapping rib. The hook of the mounting is sized such that it lies entirely within the general contour of the rib beneath, so that when the roofing is installed, no bulging of the free edge of the overlapping longitudinal rib can occur. Through the arrangement according to the embodiments a reliable holding and secure fixing of the overlapping longitudinal rib can be achieved. The overlapped longitudinal rib of the adjacent metal sheet i ensured with facilitated assembly and simplified form of th~ ncinting through the avoidance of any clamping mounting. Together with the form-fitting securing of the overlapping and overlapped longitudinal ribs of adjacent 20 metal sheets to the roof structure goes the advantage of a stronger joi-t of the roofing as a whole, whereby the use of larger covering areas of the individual sheets can be possible. This, in turn, gives a further reduction in the "total cost of installing a roof. In addition, the formfitting securing of the roofing to the roof structure makes it possible to dispense with the reinforcement of the metal sheets or of intermediate ribs hitherto essential to roofing. Thus, the advantage of a considerable saving of 6* material is achieved. In known roofing designs, mountings had to be associated with intermediate ribs in order to achieve an adequate total stability, but with the present embodiments a considerable reduction in the amount of material required can be achieved.

One advantageous further development lies in the fact that a second support formed at the head of the overlapping longitudinal rib can be provided so that it is associated with the hook of the mounting and/or that at least one support co-operating with the inner periphery of the hookshaped mounting is formed at the overlapped longitudinal rib. Further, provision can be made for a second support co-operating with the inner periphery of the hook-shaped mounting.

The use of the above can be achieved without any increase in manufacturing or installation costs for the roofing components and leads to a strengthening of the joint of the roofing.

In a further exampl; provision may also be made for the head of the overlapped longitudinal rib to be only half a trapezoidal shape and for the free flange of it to abut the inner periphery of the hook.

An excel2ent sealing of the overlap between the upper and.

lower longitudinal ribs and between two adjacent metal sheets can be achieved by the fact that the transition from the overlapped longitudinal rib to its head can be in the form of a contact surface for sealing, in direct or i* indirect relation to the edge region of the head of the overlapping longitudinal rib. Provision can also be made for the region between the flanged edge region of the head and the transitional section in the head of the overlapped longitudinal rib to be in the form of a labyrinth seal. It may further comprise a seal composed of a continuous sealing strip placed on the free edge region, to be disposed between the free edge or the flanged edge region of the head of the overlapping longitudinal rib.

Provision is made in another example for the head of the overlapped longitudinal rib to have, in association with a curved shape of the hook of the mounting, an essentially triangular cross-section.

In a further embodiment provision is made for the head of the overlapped longitudinal rib, to have an upper wall of a longitudinal bead delimiting the head of the overlapping longitudinal rib engaged with an angularly extending hook of the mounting. The head of the overlapped longitudinal rib is accordingly formed to a similar trapezoidal shape to the cross-section of the head of the overlapping rib.

Independent of the embodiment selected, it is useful for the length of t'e end of the free arm of the hook to the bearing arm of the mounting to correspond at least o. approximately to the greatest, in particular diagonal, diameter of the head of the overlapped longitudinal rib.

20 To obtain a form-fitting arrangement of the surfaces of the head of the overlapped longitudinal rib, in relation to the corresponding parts of the inner periphery of the securing e hook, provision may be made for the distance from the free end of the free arm of the securing hook to the bearing arm of the hook to be slightly smaller than the greatest, in particular diagonal, diameter of the head of the overlapped longitudinal rib.

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Claims

1. Cladding composed of interconnected sheets disposed side by side, the individual sheets of which are provided along their two longitudinal edges with respective longitudinal ribs projecting upwards in relation to the plane of the sheets, the sheets being fixed to a supporting structure by means of hook-shaped mountings that are secured to the supporting structure, the longitudinal ribs of immediately adjacent metal sheets overlapping in such a way that the longitudinal ribs differ on one side to the other side of each metal sheet so that one longitudinal rib of one metal sheet overlaps the longitudinal rib of the adjacent metal sheet facing it so there is an overlapping rib and an overlapped rib and with the hook-shaped mountings engaging the overlapping rib in a form fitting manner.

2. Cladding according to claim 1, wherein a free :0. edge of an overlapping rib is hooked with the hook of the mounting. 20

3. Cladding according to any one of claims 1 and 2, wherein there is a free edge of an overlapping rib formed in the region of a head of the overlapped rib. *j

4. Cladding according to claim 1, wherein a hook of i each of the hook-shaped mountings is disposed in an 25 overlappilt, manner in relation to the head of the rib overlapped and engages in a form-fitting manner with at least one free edge at the head of the overlapping rib.

5. Cladding according to claims 1 or 4, wherein the ee... hook of a hook-shaped mounting has a support for the cladding, so the cladding will be supported near the overlapped ribs.

6. Cladding according to claims 5, wherein the hook of a hook-shaped mounting has a second support for the cladding.

7. Cladding according to any one of claims 1 to 6, wherein the head region of one engaged rib has a generally trapezoidal cross-section and is engaged with a hook of the hook-shaped mountings which also has a generally trapezoidal cross-section, and wherein an inwardly directed edge region of the head of the other rib is engaged with a free arm of the hook of the hook-shaped mounting as a first support.

8. Cladding according to any one of claims 1 to 7, 60#4 wherein an upper wall of a longitudinal bead delimiting the head of a rib from the rib itself is engaged with a lower horizontally extending crosspiece of said hook-shaped S 20 mounting as a second support.

9. Cladding according to any one of claims 1 to 8, wherein the head of the overlapped rib is half trapezoidal in shape and a free flange thereof abuts the inner periphery of the hook of a hook-shaped mounting.

Cladding according to any one of claims 1 to 9, wherein a transitional region of the overlapped rib has its head provided with a contact sealing surface for sealing with the edge region of the head of the overlapping rib.

11. Cladding according to any one of claims 1 to wherein in the head of the overlapped rib has a triangular shape. 14

12. Cladding according to any one of claims 1 to 11, wherein the head of the overlapping rib engages behind an upper wall of a longitudinal bead delimiting the overlapping rib, said overlapped rib being trapezoidal in shape and similar to the cross-section of the overlapping rib.

13, Cladding according to any one of claims 1 to 12, wherein a continuous sealing strip is provided on a free edge region of the rib and disposed between a flanged edge region and a transitional region.

14. Cladding according to any one of claims 1 to 13, wherein a region between a flanged edge region of the head of the overlapping rib and a transitional region of the 6" overlapped rib is in the form of a labyrinth seal.

15. Cladding according to any one of the claims 1 to 20 14, wherein the length ot a free end of a free arm of a mounting hook to a bearing arm of the mounting corresponds at least approximately to the greatest dimension of the head of the overlapped rib.

16. Cladding according to any one of claims 1 to 14, wherein the length of the free end of a free arm of a mounting hook to the bearing arm of the mounting is slightly smaller than the greatest dimension of the head of the overlapped rib.

17. Cladding according to any one of claims 1 to 16, wherein the head of the overlapped rib is trapezoidal in shape and shaped like the inner periphery of the hook only at its upper region. 4 4 V

18. A cladding sheet with a respective longitudinally extending rib on each side, each rib being upstanding from the plane of the sheets, and the rib on one side being shaped different to the rib on the other but such that when a similar sheet is to be interconnected in side by side relation, the rib on one sheet locates over the rib of the In a -forM- -(&iCfe'f Mqfvi2r-- other ad go that a hook-shaped mounting can be engaged A with at least the overlapping rib.

19. A cladding sheet as claimed in claim 18 wherein each rib has a head which is of generally trapezoidal shape, so that when two sheets are engaged one head of one rib locates within the head of the other, with a hook of a hook-shaped mounting engaged within the trapezoidal shaped head.

20. Cladding as claimed in any one of claims 1 to 17 and substantially as herein desc,:ibed with reference to any S 20 one of tae examples ir the accompanying drawings.

21. A cladding sheet as claimed in claim 18 or claim 19 and substantially as herein described with reference to any one of the examples in the accompanying drawings. DATED THIS 3RD DAY OF AUGUST 1992 Franz ZAMBELLI By his Patent Attorneys: GRIFFITH HACK CO. Fellows Institute of Patent Attorneys of Australia ABSTRACT Cladding for roofing or walls is provided. The cladding is composed of sheets disposed side by side, the individual sheets of which are provided along their two longitudinal edges with longitudinal ribs projecting upwards in relation to their plane. The cladding can be fixed to the supporting structure by means of hook-shaped mountings. The longitudinal ribs of immediately adjacent sheets at least partially overlap in such a way that the longitudinal ribs differ sufficiently so that when the roofing is installed one longitudinal rib of one metal sheet fits over the side of the longitudinal rib of the adjacent metal sheet facing. A hook-shaped mounting can then engage in a o frictional and form-fitting manner in the head of at least one of two overlapping longitudinal ribs. a p S as ease *a I. s•eas