The invention relates to a structural part for substantially medium-tight clamping of foil parts. The invention also relates to a wall part provided with at least one such structural part. The invention further relates to a method for substantially medium-tight clamping of foil parts.

The medium-tight sealing of wall parts, such as for instance an upright wall or an optionally pitched roof, of a property is generally deemed to be of great importance. This is because leaks will usually occur relatively quickly in the case no provisions are made for the medium-tight sealing of these wall parts, which can result in considerable damage to the property. The covering of flat roofs is conventionally carried out by means of bituminous roofing material. A drawback of bituminous roofing material is that this roofing material has a relatively short lifespan, wherein handling of the bituminous roofing material is usually also relatively labour-intensive. Bitumen is furthermore generally regarded as an environmentally harmful substance. In order to improve the lifespan of the roof covering, use has usually been made in recent years of plastic foils as roof covering. The plastic foils, usually manufactured from EPDM or PVC, generally have a relatively long lifespan of 40 to 45 years. The plastic foils are generally supplied in strips of varying standardized dimensions, mostly in strips of a length of (a maximum of) 10 metres and a width of 60 cm. The strips are further positioned alongside each other on the wall part, such as for instance a roof, whereafter the strips are tensioned and are glued or welded to each other. A significant drawback of covering roofs and the like with plastic foils is that the glueing or welding together of the plastic foil strips is generally a critical activity and above all time-consuming, and can usually only be carried out by skilled workers specifically trained for this purpose. Relatively heavy and relatively slowly operating equipment is generally required here during the welding together of the different strips, whereby the welding is considered a relatively labour-intensive activity. The foil strips are moreover permanently connected to each other by means of the conventional glueing and welding methods, which generally makes maintenance and/or replacement of individual strips difficult or even impossible.

The invention has for its object to provide a structural part, using which the foil parts can be coupled medium-tightly to a wall part in relatively rapid and flexible manner.

The invention provides for this purpose a structural part of the type stated in the preamble, comprising: at least one first clamping part adapted for coupling to a wall part, and at least one second clamping part adapted for co-action with at least one first clamping part while clamping at least one foil part in substantially medium-tight manner. By clamping one or more foil parts in the structural part according to the invention the foil parts no longer have to be mutually coupled in permanent manner by means of glueing or welding in order to realize a substantially medium-tight wall (part) covering. Since the foil parts are only clamped mechanically and are not connected physically and permanently to each other, damaged foil parts ready for maintenance and/or replacement can be removed relatively easily and quickly from the detachable structural part according to the invention, and for instance be replaced with another (undamaged) foil part. Clamping of a foil part in the structural part according to the invention can moreover also take place relatively quickly and advantageously without specific professional skill being required here. An additional advantage here is that the foil (part) does not have to be damaged per se during clamping in the structural part, but can be clamped medium-tightly immediately after the foil has been arranged on a wall part. The advantageous structural part according to the invention thus provides a solution for clamping foil parts substantially medium-tightly in relatively rapid and flexible manner for a shorter or longer period. The structural part will usually clamp in substantially medium-tight manner a plurality of foil parts (of different foil strips) positioned mutually adjacently, whereby the detachable structural part in fact functions as a joint for holding these foil parts (under bias), wherein both clamping parts can in fact be deemed as joint parts. A (part of a) longitudinal edge of at least one foil part will usually be clamped medium-tightly, or at least liquid-tightly, by the structural part. The foil part generally forms part of a prefabricated plastic foil strip with a standardized width of for instance 60 cm. In this context the wall part must be interpreted in a broad sense; the wall part can for instance be formed by, or form part of, a roof construction, an optionally upright wall construction, and a floor construction optionally situated at a distance from the fixed world. The wall part can form part of both immovable and movable property. In this context it is also possible here to envisage covering in substantially medium-tight manner a "wall part of for instance a supply container, in

particular a water basin, with the foil part. The coupling means for coupling the first clamping part to the wall part can be of very diverse nature, but will generally be formed by mechanical and/or chemical fixing means. In an embodiment variant it is even possible to envisage having the first clamping part form an integral part of the wall part, wherein the first clamping part is also manufactured for instance during the manufacture of the wall part, such as for instance a window frame, by means of for instance extrusion, injection moulding or blowing. In order to enable the realization of a medium-tight, or at least substantially medium-tight, clamping of the foil part, the foil part will generally be received in the structural part in an orientation of non-linear cross- section.

The first clamping part and the second clamping part are preferably adapted to clamp a plurality of foil parts forming part of different foils. The usually peripherally oriented foil parts will here generally form part of two mutually connecting foil strips. The foil parts will usually be received in the structural part in overlapping state in order to enable the medium-tight or at least liquid-repelling capability of the structural part to be further improved. As already stated, a particular advantage of the structural part according to the invention is that the structural part is detachable, whereby a clamped foil part can be removed relatively quickly and easily from the structural part. The relative orientation of the first clamping part and the second clamping part can here generally be altered. The nature of the change in orientation, can herein be very diverse, but will generally be formed by a translatable displacement.

In a preferred embodiment, at least one clamping part of the first clamping part and the second clamping part is formed by a clamping profile. The clamping profile can herein extend over a wall part parallel to a longitudinal edge of a foil part so as to enable at least partial clamping of this longitudinal edge using one or more second clamping parts. The first clamping part is preferably adapted for simultaneous co-action with a plurality of second clamping parts to enable a relatively efficient structural part of relatively simple construction to be provided. In order to further reduce the number of components of the structural part, both the first clamping part and at least a part of the second clamping part can be formed by mutually co-acting clamping profiles.

A plurality of foil parts, in particular longitudinal edges of possibly different foil layers, will usually have to be clamped in substantially medium-tight manner. It is therefore advantageous that the structural part comprises a plurality of first clamping parts and a plurality of second clamping parts in order to enable optimum fixing of tb_e one or more foil layers to a wall part. The first clamping part and the second clamping part are here usually positioned alongside or at the position of a seam defined by two adjacent foil layers, wherein the clamping parts can enclose foil parts of different foil layers, in particular the seam.

In a preferred embodiment, the structural part comprises at least one covexing element for substantially medium -tight covering of outer ends of mutually co-acting clamping parts and/or outer ends of clamping parts positioned close to each other. S ince the clamping parts are usually formed by extruded or rolled clamping profiles, an end surface of such clamping parts will generally not have a liquid-repelling form. It is therefore advantageous to have transitions or junctions of a plurality of clamping parts enclosed medium-tightly by one or more covering elements. It is thus possible for the usually relatively critical end surfaces of the clamping parts to also be cohered in efficient and liquid-repelling manner. In a particular preferred embodiment, the covering element takes a substantially shell-like form. A shell-like covering element is generally advantageous in that such a covering element encloses a receiving space for outer ends of one or more clamping parts. The covering element herein preferably still comprises a plurality of receiving openings, wherein each receiving opening is adapted for passage of an assembly of a first clamping part and a second clamping; part co-acting with the first clamping part. It is thus possible to seal in substantially liquid-repelling manner extensions, T-junctions or X-junctions of a plurality of assemblies of a first clamping part and a second clamping part co-acting with the first clamping part. Possible sawing tolerances and inaccuracies in the two clamping parts cant herein be compensated by the shell-like covering element, whereby a substantially medium-tight sealing of the foil parts can be achieved. A particular advantage of the shesll-like covering element is that the receiving space can generally also be applied to accommodate loose ends of different foil parts. The first clamping part and the second clamping part are usually pressed together by the covering element. A bias is in this case applied to both clamping parts by means of the covering element, which results in medium-tight covering of the foil layer. In order to be able to optimize the bias to be

applied to both clamping parts, the structural part preferably comprises a support element (or press-on element) positioned on a side of the first clamping part remote from the second clamping part for the purpose of supporting the covering element.

In order to optimize the medium-repelling capability of the assembly of structural part and at least one foil part, it is important that both clamping parts exert sufficient bias on the clamped foil part. It is therefore advantageous that the structural part comprises a locking pin adapted to cause both clamping parts to mutually engage under bias. The magnitude of the biasing force, and therewith the medium-repelling capability of the structural part, can be regulated by means of the locking pin. In a preferred embodiment the effective length of the locking pin is adjustable. In this manner it is possible to regulate in optimal manner the biasing forces exerted by the clamping parts on the one or more foil parts received in the structural part. It is even possible here to envisage increasing the length of the locking pin such that the clamping parts can be oriented at (some) limited distance from each other, whereby the at least one foil part can be arranged in the structural part or removed from the structural part. The locking pin preferably passes through both clamping parts, and more preferably the centre of both clamping parts, wherein both clamping parts are provided with a passage for the locking pin in order to optimize the power transmission onto the two clamping parts. In determined situations it is however also possible to envisage applying a plurality of locking pins in a single structural part for the purpose of locking both clamping parts. In another particular preferred embodiment, the locking pin passes through the above described covering element to enable clamping, via the covering element, of the clamping parts and the foil part positioned between the clamping parts. As already stated above, the clamping force exerted on the foil part by the clamping parts will usually be determined by the bias exerted on the clamping parts by the covering element. It is not necessary here for the mutually co-acting clamping parts to be physically coupled to each other.

At least a part of the second clamping part preferably takes a shell-like form. By giving the second clamping part a shell-like form the second clamping part can close round a part of the first clamping part. For this purpose the second clamping part preferably still encloses at least one receiving space for receiving at least a part of at least one first clamping part. Closing round or enclosing at least a part of the first clamping part

generally contributes toward the optimization of the medium-repelling capability of the structural part. The second clamping part can herein also be designed such that this second clamping part can also engage (under bias) on a wall part supporting the first clamping part. The receiving space of the second clamping part is preferably adapted to simultaneously receive at least parts of a plurality of first clamping parts. The second clamping part can thus be applied to cover medium-tightly junctions of a plurality of first clamping parts, such as for instance first clamping parts positioned mutually in line, T-junctions or X-junctions of first clamping parts.

Sealing means are preferably arranged between both clamping parts. The separate sealing means generally contribute to an improved medium-sealing capability of the structural part. The sealing means can herein be formed by a sealing element positioned separately between the two clamping parts and connecting to the foil part, although it is also possible to envisage glueing the sealing means to a side of the second clamping part directed toward the first clamping part, and vice versa. The sealing means are manufactured from a liquid-impermeable material layer, preferably a flexible material layer for forming as the situation requires around the free space present between the clamping parts. The sealing means are more preferably manufactured from an elastomer, in particular EPDM. The foil (part) is generally also manufactured from EPDM, which results in a good mutual sealing between the foil part and the sealing means. An advantage of applying sealing means manufactured from EPDM is that EPDM has a relatively long lifespan, can withstand relatively large temperature fluctuations, has a stable elasticity which remains high of about 400%, resulting in a relatively high tear resistance, and can withstand ozone and ultraviolet radiation, which prevents ageing of the sealing means. Reinforced EPDM is preferably applied, wherein the EPDM is strengthened by means of glass fibres, which does however significantly reduce the elasticity but wherein compressing of foils manufactured from reinforced EPDM nevertheless remains possible, hi a preferred embodiment the sealing means take a substantially prismatic form. The sealing means are usually formed here by a relatively sufficiently dimensioned flat and/or pre-formed disc preferably extending as far as, but more preferably beyond, a clamping line defined by the first clamping part and the second clamping part. In a preferred embodiment the sealing means are arranged between the covering element such that all the outer ends of clamping parts coming together in the covering element are overlapped by the sealing means. It is also

advantageous in such a preferred embodiment to allow the sealing means to extend as far as, and more preferably beyond, a clamping line defined by the covering element and the clamping parts.

In order to further improve the medium-repelling capability of the structural part, the structural part is preferably provided with a support element for the second clamping part on a side of the first clamping part remote from the second clamping part. The support element can herein form an integral part of the first clamping part, but can also be formed by an element connected separately to the first clamping part. The support element can contribute toward an additional medium-repelling capability in that the second clamping part can be positioned such that it co-acts (under bias) with the first clamping part as well as with the underlying support element.

In an alternative preferred embodiment, the first clamping part and the second clamping part have substantially the same form. Such a case can preferably occur where both the first clamping part and the second clamping part are formed by (extruded) clamping profiles of substantially the same form which take a mutually nestable and optionally connectable form. Such a preferred embodiment is usually advantageous due to the structural simplicity of the structural part for assembly and due to the usually reliable fitting of the clamping parts of the same form to the one or more foil parts. Only a single mould is moreover required to enable manufacture of both clamping parts. In an embodiment variant it is possible to envisage providing the first clamping part and/or the second clamping part with clamps, in particular teeth, to enable mutual coupling of the two clamping parts while clamping the one or more foil parts.

The invention also relates to a wall part provided with one or more structural parts according to the invention. The wall part is preferably formed here by at least one of the following wall parts: a roof part, an upright wall part and a floor part. Other types of wall part are however not precluded here.

The invention further relates to a method for substantially medium-tight clamping of foil parts using at least one structural part according to the invention, comprising the steps of: a) positioning at least one foil part on a first clamping part, and b) causing a second clamping part to co-act with the first clamping part with substantially medium-

tight clamping of the foil part. The foil part will usually be arranged on the first clamping part in a three-dimensional, non-planar path, or at least be arranged after bringing about co-action of the second clamping part with the first clamping part. During step a) a plurality of foil parts forming part of different foils are preferably positioned on the first clamping part. It is thus possible to couple two adjacent foil layers medium-tightly to each other in releasable manner. In order to optimize the medium-repelling capability, the foil parts are positioned on the first clamping part during step a) such that the foil parts overlap each other. Bringing about mutual co- action of the two clamping parts as according to step b) is preferably realized by applying a bias to both clamping parts via a covering element enclosing a part of the clamping parts.

In a preferred embodiment the method also comprises step c), comprising of positioning a separate sealing element on the foil part after positioning of the foil part on the first clamping part as according to step a). The sealing element will preferably be formed herein by a sealing disc manufactured from an elastomer, in particular EPDM or PVC. In another preferred embodiment, the first clamping part is formed by a clamping profile, wherein the foil part is positioned as according to step a) in the clamping profile. While performing step b) a plurality of second clamping parts are more preferably arranged here on the clamping profile for co-action with the clamping profile. The second clamping part is preferably also formed by a clamping profile during performing of step b). In another preferred embodiment, the foil part is firstly positioned in tensioned manner, whereafter the foil part will in fact be clamped. The foil part is generally provided for this purpose with perforations, whereby the foil part can be tensioned on a plurality of locking pins. The locking pins are herein also applied to enable clamping of the two clamping parts onto each other. The advantage of such a preferred embodiment is that a certain pre-assembly can take place, wherein a precise positioning of the foil part can take place, whereafter the foil part can be clamped. Further advantages of these preferred embodiments have already been described at length in the foregoing.

The invention will be elucidated on the basis of non-limitative exemplary embodiments shown in the following figures. Herein:

figure 1 shows a cross-section of an assembly of a structural part according to the invention and a foil part clamped in the structural part, figure 2 shows a cross-section of another assembly of an alternative structural part according to the invention and two foil parts clamped in the structural part, figure 3a is a perspective view of yet another structural part according to the invention, figure 3b shows a cross-section of the structural part of figure 3 a, figure 4 is a perspective view of a part of a modular construction system which can be disassembled and which is provided with a structural part according to the invention, figure 5 shows a cross-section of an alternative structural part according to the invention, figure 6 shows a cross-section of a device for clamping foil parts according to the invention, figure 7 shows a cross-section of another device for clamping foil parts according to the invention, and figure 8 shows a cross-section of yet another device for clamping foil parts according to the invention.

Figure 1 shows a cross-section of an assembly 1 of a structural part 2 according to the invention and a foil 3 clamped in structural part 2. Structural part 2 is herein fixed to a horizontal roof construction 4 by means of conventional fixing means (not shown). Roof construction 4 is herein covered by the foil 3 manufactured from plastic, in particular EPDM. In order to avoid ballasting of foil 3, the foil is clamped (undamaged) in structural part 2. Structural part 2 herein comprises a lower clamping profile 5 which is coupled to roof construction 4 and an upper clamping profile 6 which is arranged releasably in lower clamping profile 5 and co-acts with clamping profile 5. Both clamping profiles 5, 6 herein have substantially the same form and are therefore nestable. Foil 3 is clamped between the two clamping profiles 5, 6, wherein foil 3 is only deformed at the position of structural part 2 and not damaged. Since foil 3 is impermeable to liquid, water falling on the roof, usually rain, will not be able to penetrate to roof construction 4. However, the clamping of foil 3 in structural part 2 is so stable that falling water cannot make its way between the two clamping profiles 5, 6, whereby a water-repelling clamping of foil 3 is also realized. In the unlikely event that foil 3 is nevertheless damaged during clamping in structural part 2, incoming water will - in the case the damage is localized between the two clamping profiles 5, 6 - still be

unable to reach roof construction 4 via migration. Clamping of foil 3 is generally advantageous for strengthening the foil 3 against wind loads without foil 3 having to be interrupted. The application of additional ballast, such as for instance gravel, is thus no longer necessary. In order to further strengthen structural part 2 against wind loads, structural part 2 can be arranged (slightly) recessed into roof construction 4 (not shown).

Figure 2 shows a cross-section of another assembly 7 of an alternative structural part 8 according to the invention and two foil parts 9, 10 clamped in structural part 8. Structural part 8 herein in fact connects the two adjacently positioned foil parts 9, 10 in releasable yet substantially medium-tight manner. Structural part 8 is arranged on a wall part 11 by means of a central bolt 12. Structural part 8 comprises a base profile 13 and a top profile 14 co-acting with base profile 13. Both base profile 13 and top profile 14 are provided with a passage for central bolt 12, wherein a nut 15 co-acting with bolt 12 can regulate the bias between base profile 13 and top profile 14 to enable a medium-tight clamping of the foil parts to be realized. A sealing element 16 is arranged between bolt 12 and nut 15 in order to prevent the leakage of liquid, usually water, to a space 17 enclosed by top profile 14. Each foil part 9, 10 is provided with a perforation for passage of bolt 12. The perforation is herein so small that each foil 9, 10 closes round bolt 12 under bias, and thereby in substantially medium-tight manner. Foil parts 9, 10 are clamped medium-tightly along a circular clamping line 18 by base profile 13 and top profile 14.

Figure 3 a shows a perspective view of yet another structural part 19 according to the invention. Structural part 19 is connected to a wall part 20 (see figure 3b) which is here covered in medium-tight manner by a plurality of foil strips 21, 22, 23. The longitudinal edges of these foil strips 21, 22, 23 are here clamped medium-tightly between three lower clamping profiles 24 and a corresponding number of upper clamping profiles 25. Lower clamping profiles 24 are herein connected to wall part 20, while upper clamping profiles 25 exert on both foil strips 21, 22, 23 and lower clamping profile 24 a clamping force which is so great that migration of liquid via clamping profiles 24, 25 to wall part 20 can be prevented. The clamping force is herein a result of a biasing force exerted by a protective cap 26 on upper clamping profiles 25. The biasing force is herein caused by a central tensioning bolt 27 connected to wall part 20 and a nut 28 co-acting with

tensioning bolt 27. Nut 28 engages on a side of the protective cap 26 remote from clamping profiles 24, 25, whereby tensioning bolt 27 is pulled in the direction of wall part 20 and thus generates a clamping action. Protective cap 26 is provided with a plurality of receiving openings 29 for clamping profiles 24, 25 in order to enable enclosing of clamping profiles 24, 25 at the shown T-junction to be optimized. In order to maximize the liquid-repelling capability of structural part 19, a sealing disc 30 manufactured from EPDM is positioned between protective cap 26 on the one hand and clamping profiles 24, 25 on the other, which disc extends beyond a clamping line 31 defined by protective cap 26 and clamping profiles 24, 25.

Figure 3b shows a cross-section of a part of the structural part 19 of figure 3a. It can be clearly seen here that foil strips 21, 22, 23 are mutually clamped between lower clamping profiles 24 and upper clamping profiles 25. Protective cap 26 and the sealing disc 30 positioned between protective cap 26 and upper clamping profiles 25 contribute toward optimizing the liquid-repelling capability of structural part 19. Tensioning bolt 27 is fixed on one side to protective cap 26 via nut 28 and is fixed at an opposite outer end using a support element 32 fixed to wall part 20. Tensioning bolt 27 will generally form part of a detachable structural joint 33 for the mutual fixing of tubular bodies, in particular as described in the non-prepublished Netherlands patent application NL 1024455. Figure 3b also clearly shows that lower clamping profiles 24 and upper clamping profiles 25 have substantially the same form, wherein the longitudinal edges of each foil strip 21, 22, 23 are received between clamping profiles 24, 25 by means of a three-dimensional (non-planar) path, which generally enhances the liquid-repelling capability of structural part 19. As shown, each foil strip 21, 22, 23 extends just beyond tensioning bolt 27. It can however be advantageous to have each foil strip 21, 22, 23 extend over substantially the full width of clamping profiles 24, 25 so that a double clamping of foil strips 21, 22, 23 can be realized instead of a single clamping. It is noted that tensioning bolt 27 can form an integral part of structural joint 33. It is possible here to envisage positioning structural part 19 at a distance from wall part 20 with interposing of the structural joint 33, or at least a pin forming part of structural joint 33, wherein other types of provision, such as for instance an insulating layer or vapour- control layer, can be arranged between structural part 19 and wall part 20. It is noted that, instead of a structural joint 33, a structural beam (not shown) can also be applied to hold tensioning bolt 27 in place.

Figure 4 shows a perspective view of a part of a modular building system 34 which can be disassembled and which is provided with a structural part 35 according to the invention. The construction, system 34 comprises a plurality of releasably connected panels 36 which together enclose an accommodation area 37. An outer side of construction system 34 is covered with an impermeable plastic foil 38. In the shown exemplary embodiment two upright wall parts 39, 40 and a curved wall part 41 - which is also deemed to be a floor part - are covered with foil 38. Foil 38 is arranged in a plurality of foil strips 42 on wall parts 39, 40, 41. The seams formed between two adjacent foil strips 42 are now enclosed medium-tightly by clamping profiles 43 forming part of structural part 35. Structural part 35 is here structurally similar to the structural part 19 shown in figures 3 a and 3b, with the difference that types of clamping profile junctions other than T-junctions are now also present, such as for instance X- j unctions. In order to make the junctions liquid-repelling, the junctions are covered with covering elements 44 corresponding with the protective cap 26 shown in figures 3a and 3b. Structural part 35 takes a removable form and forms part of a larger construction, in this case the construction system 34 that can be disassembled. A relatively reliable and durable liquid-repelling seal can thus be realized relatively rapidly, efficiently and easily between adjacent foil strips 42 in order to enable the realization of a reliable liquid-repelling wall part covering.

Figure 5 shows a cross-section of an alternative structural part 45 according to the invention. Structural part 45 is herein connected to a wall part 47 by means of mechanical fixing elements 46 and is adapted to couple two foil parts 48, 49 in substantially medium-tight manner. Structural part 45 comprises for this purpose two angle profiles 51 which are mutually connected by means of mechanical fixing elements 50 and between which the tΛvo foil parts 48, 49 are clamped. Angle profiles 51 can for instance be manufactured here from metal. Foil parts 48, 49 preferably protrude relative to angle profiles 51 to enable the clamping of foil parts 48, 49, and thereby the medium- repelling capability of structural part 45, to be optimized.

Figure 6 shows a cross-section of a device 52 for clamping foil parts 53 according to the invention. Device 52 comprises for this purpose a profiled support element 54, which support element 54 can form an integral part of another object, such as for instance a

property, in particular a wall or roof construction. Support element 54 is provided with a bolt 55, which bolt 55 protrudes relative to support element 54. Arranged on the support element is a lower clamping profile 56 which has a substantially bridge-like form in cross-section. The lower clamping profile 56 is provided with a passage opening to allow passage of at least a part of bolt 55. The lower clamping profile 56 is adapted for co-action with an upper clamping profile 57 of substantially bridge-like cross-section in order to enable clamping of foil parts 53. For this purpose the upper clamping profile 57 is also provided with a passage opening for passage of at least a part of bolt 55. A bias can be exerted on both clamping profiles 56, 57 by means of a nut 58 co-acting with bolt 55. The magnitude of the biasing force exerted on clamping profiles 56, 57, and therewith the clamping force exerted on foil parts 53, can also be regulated by means of axial rotation of nut 58. As shown, the biasing force is applied bilaterally and via a relatively small contact surface, whereby a certain clamping line A is generated for the purpose of clamping the foil parts 53, whiereby the clamping of foil parts 53 is considerably improved. This is because the use of clamping line A results in a certain concentration of the biasing force, and thereby the clamping force exerted by clamping profiles 56, 57 on foil parts 53. As shown in this figure, the lower clamping profile 56 is arranged on the profiled support element 54 in substantially close-fitting manner, whereby clamping profile 56 can be aligned relatively easily. In this manner a relatively reliable positioning of lower clamping profile 56, and thereby a reliable clamping of foil parts 53, can moreover be realized.

Figure 7 shows a cross-section of another device 59 for clamping foil parts 60 according to the invention. Device 59 comprises a lower clamping profile 61 on which are positioned outer ends of two foil parts 6O. An upper clamping profile 62 is further connected to lower clamping profile 61 foy means of a snap connection while clamping both foil parts 60. In order to realize the snap connection the lower clamping profile 61 is provided with a protruding shoulder 63 and upper clamping profile 62 is provided with a cup-shaped body 64. Only after overcoming a bias can the upper clamping profile 62 be snapped onto lower clamping profile 61, whereby the clamping action on foil parts 60 is realized. Both clamping profiles 61, 62 are preferably manufactured from metal, in particular aluminium or stainless steel. As shown in this figure, foil parts 60 are clamped along a (widened) clamping line because cup-shaped body 64 co-acts under bias with shoulder 63. In shown device 59 it is advantageous that there is a metal-to-

metal contact between shoulder 63 and cup-shaped body 64, without interposing any foil part, which considerably enhances the co-action between the two clamping profiles 61, 62 and in particular the reliability thereof. The bias is furthermore exerted on shoulder 63 by cup-shaped body 64 in an upward direction (see arrows B) which is substantially perpendicular to a structure (not shown) carrying the lower clamping profile 61, whereby the clamping of foil parts 60 can also be locked. A plurality of bolts 55 will generally be applied in each device 59, wherein the mutual distance between bolts 55 depends on the situational conditions.

Figure 8 shows a cross-section of yet another device 65 for clamping foil parts 66 according to the invention. Device 65 comprises a lower clamping profile 67, which lower clamping profile 67 forms an integral part of a roof construction 68. Lower clamping profile 67 is provided with a plurality of protruding bolts 69 situated in line and at a mutual distance. Device 65 further comprises a covering clamping profile 70 which is placed on lower clamping profile 67. The covering clamping profile 70 is herein provided with a plurality of passage openings for the respective bolts 69. By means of nuts 71 arranged on bolts 69 the covering clamping profile 70 can be pulled in the direction of lower clamping profile 67, whereby foil parts 66 are clamped. In an alternative embodiment the covering clamping profile 70 can (also) form an integral part of another object, such as for instance a roof covering, and in particular an exterior facing panel.

It will be apparent that the invention is not limited to the exemplary embodiments shown and described here, but that numerous variants which will be self-evident to the skilled person in this field are possible within the scope of the appended claims.