WO2010122241A2

WO2010122241A2 - Attachment part for assembling a module, in particular a photovoltaic module, on a ribbed metal sheet, assembly and use thereof for making a building cover, and related method of production

Info

Publication number: WO2010122241A2
Application number: PCT/FR2010/000319
Authority: WO
Inventors: Eric Chabas; David Masure; Christophe Dufosse; Didier Chevallier
Original assignee: Arcelormittal Construction France
Priority date: 2009-04-20
Filing date: 2010-04-20
Publication date: 2010-10-28
Also published as: EP2422376A2; FR2944568A1; WO2010122241A3; FR2944568B1

Abstract

The invention essentially relates to an attachment part (1) for assembling a module (30), in particular a photovoltaic module, on a ribbed metal sheet (20) including an alternation of ribs and lands, essentially characterized in that it comprises an overhang (2) enabling the assembly of two adjacent metal sheets by overlap of their side edges. The invention also relates to an assembly including the ribbed metal sheet (20) and one or more modules (30) rigidly connected to the metal sheet (20) by attachment parts (1). This assembly can be used for making building covers.

Description

Fastener for assembling a module, particularly photovoltaic, on a ribbed sheet, assembly and use for the realization of a building cover and associated manufacturing method.

The invention mainly relates to a fastener for assembling a module on a ribbed sheet.

The invention also relates to the assembly of the module on the ribbed sheet, its use to manufacture a building cover and the associated manufacturing process. The module can be a photovoltaic module without being limited thereto.

Photovoltaic modules generally have the form of a frame carrying photovoltaic cells. These modules are reported on the cover of buildings and secured to this cover by appropriate means of attachment.

It is known to make the roof covers with ribbed sheets, for example galvanized steel prepainted, whose edges overlap to seal the system.

It is also known from DE202007005995, EP1267418, WO2007 / 093421 and DE202008007662 fasteners for assembling a module on a ribbed sheet. These parts, however, require the installation of the roof at first and the assembly of the modules on the roof in a second time.

The assembly of photovoltaic modules on a ribbed sheet metal roof previously laid implies the intervention of two trades which causes problems of coordination on the site as well as times of completion of coverage and associated costs too high.

Moreover, the realization of such an assembly should allow to continue to ensure the tightness of the building cover, which do not favor the conditions of assembly on site.

Naturally, the strength of the assembly and its resistance to mechanical stresses generated for example by the wind and the weight of the snow must be ensured.

COPY OF OMFIRMATJTO For this purpose, the invention proposes to overcome the aforementioned problems by proposing a fixing part of a module on a ribbed sheet, made of an alternation of ribs and beaches and having side edges that can be engaged, comprising at least first and second fastening zones of said part on said sheet,

an overhang comprising at least one fixing zone of the module situated in a plane set back from the lateral edges of the sheet, said overhang allowing the assembly of two adjacent sheets by overlapping their lateral edges.

The fastener of the invention may also include the following optional features taken in isolation or in combination:

- it is intended for a single module,

it comprises a photovoltaic cell support zone when the module is a photovoltaic module made of a frame carrying photovoltaic cells, this support zone being situated between the first and second fixing zones of the sheet,

said first attachment zone is an oblique part allowing said part to be fastened to the side of a rib of said sheet, said overhang further comprises a support zone of the module.

The invention also relates to the assembly of at least one module with a ribbed sheet made of an alternation of ribs and beaches and having lateral edges that can be engaged, said assembly comprising at least two fixing pieces which solidarize the module to the sheet, said parts being according to the invention.

The assembly of the invention may also include the following optional features taken singly or in combination:

said sheet metal has lateral edges consisting of ribs or truncated ribs allowing a sealing overlap between the lateral edges of two adjacent plates and said overhang is located above the level of the top of the truncated ribs or ribs of the plates which participate in the recovery so as to to authorize said waterproof covering when at least one of said sheets is secured to a module, said fasteners extend from the truncated rib of one or the other of the lateral edges of the sheet to an adjacent rib of the same sheet.

The invention also relates to a building covering comprising a plurality of assemblies, said assemblies being according to the invention.

Finally, the invention also relates to the method of manufacturing a building cover according to the invention in which:

- A first assembly is provided with at least one module, a corrugated sheet made of an alternation of ribs and beaches and having side edges that can engage and at least two fasteners that secure said module to said sheet,

- We secure this assembly on the structure of the building to cover,

- A second assembly is engaged in the first by overlapping their lateral edges and more precisely by contacting contact of the truncated rib of the ribbed plate of the second assembly on the truncated rib of the ribbed sheet of the first assembly, the two adjacent modules being then in contact support,

- We secure the two truncated ribs.

The invention will be better understood on reading the description which follows, given with reference to the appended figures in which:

- Figure 1 is a side view of the fastener of the invention;

- Figure 2 is a perspective view of the fastener of the invention according to the arrow II of Figure 1.

FIG. 3 represents a ribbed plate on which fasteners of the invention are secured,

FIG. 4 represents an assembly according to the invention comprising two modules fixed on a ribbed sheet,

- Figure 5 is a sectional view of the assembly of the invention according to the line V-V of Figure 4. The fastener of the invention is described with reference to Figures 1 and 2.

This fastener 1 is a steel strip having a metal or organic coating, or made of any other suitable material, preferably metal. The fastener 1 has parallel folds each conferring a specific functionality. At one of the ends of the piece 1, an overhang 2, in the form of

The form at the same time support zone of the module 3 intended to receive the frame of the module, and zone of attachment of this module 4 to secure the module to the part

1. The support zone 3 is the horizontal part of the overhang 2 and the fixing zone is the vertical part of this overhang 2.

After the support zone 3, a vertical portion 5 extends to an oblique descending portion 6 which forms the first attachment zone of the part 1 on the ribbed sheet.

Since this first attachment zone 6, an upstanding oblique portion 7 extends to a flat portion 8 forming a support zone of the photovoltaic cells 8. This support zone 8 is located above the support zone of the module 3 and is substantially below the level of the free end 9 of the overhang 2 for reasons which will be explained later.

An oblique descending portion 10 extends from the support zone of the photovoltaic cells 8 to a flat portion 11 extended by an oblique descending portion 12. The flat portion 11 forms a second attachment zone 11 of the fastener 1 on the ribbed sheet.

The first 6 and second 11 attachment zones of the part 1 on the sheet each comprise a seal 13,14, for example neoprene, which extends over the width of the fastener 1. The seals 13,14 are glued on the lower face of the room 1 at the area considered. These seals 13,14 will preserve the tightness of the system as will be described later.

The oblique parts 6, 10 and 12 of the fastener 1 are substantially parallel to each other. Referring now to Figures 3 and 5 to describe the functionality and positioning of the fastener 1 in the environment of the assembly of the module on the ribbed sheet.

The corrugated plate 20 is, like the fastener, steel having a metal or organic coating, or made of any other suitable material, preferably metal.

Throughout the text, ribbed sheet 20 will be understood to mean a sheet comprising an alternation of beaches 22 and stiffening ribs 21, whose ribs 21 may be trapezoidal, corrugated, sinusoidal or omega-shaped. In this example, the ribs 21 are trapezoidal and the 22 beaches themselves comprise ribs of low height forming stiffeners that are not part of the invention.

The two lateral edges of the sheet 23,24 each comprise a truncated rib respectively 21a, 21b. Each central rib 21 has a planar upper portion 25 and two inclined flanks 26,27 conferring the omega shape. For each truncated rib 21a, 21b located at a lateral edge 23,24, the second inclined flank 28 is of shorter length than the opposite flank 26,27 of the considered rib 21a, 21b.

Preferably, the ribs 21a, 21b of opposite lateral edges 23, 24 are symmetrically similar so that, on the one hand, the sheet 20 is not subjected to any direction of installation and that on the other hand, when the realization of a building cover, two adjacent sheets are installed by overlapping their lateral edges and more precisely by contacting contact of a truncated rib 21a of the first lateral edge 23 of a first sheet on the truncated rib 21b of the second lateral edge 24 of the adjacent sheet. In this way, the seal between two adjacent sheets is better ensured.

As shown in Figures 3 and 5, a sheet has several fasteners for example four per module (Figures 3 and 4). Each fastener 1 extends perpendicularly to the ribs 21 from the truncated rib 21a, 21b of the corresponding lateral edge 23, 24 to an adjacent rib 21.

Overhang 2 forming attachment zone 4 and support 3 of module 30 overhangs truncated rib 21b from which attachment piece 1 extends, leaving a gap between the flat support zone 3 and the top of the truncated rib 21b. . This space allows the assembly of two adjacent sheets as described above by superposition of the truncated ribs 21a, 21b of the respective side edges 23,24 of these two sheets.

The first attachment zone 6 of the part 1 on the sheet 20 is in contact abutment on the lower part of the sidewall 26 of the truncated rib 21b and fixed to this sidewall 26 for example by a through screw 31. The sealing is ensured by the presence of the seal 13 previously described.

The position of this fastening zone 6 is very advantageous since it does not constrain the flow of water from the weather and flows along the sheet 1 at the beaches 22 thus avoiding any water retention. . The water is not in contact with the screw statically, there is no risk of infiltration.

The second attachment zone 11 is in contact abutment on the flat upper part 25 of the rib 21 and fixed to this flat part 25 for example by a through screw 32. The seal is provided by the presence of the seal 14 previously described. The oblique portion 12 downstream of the flat portion 25 matches the downward flank 26 of the rib 21.

The photovoltaic module 30 comprises a frame 33 which carries photovoltaic cells 34 of smaller thickness than the frame 33. As can be seen in FIG. 5, the module 30 bears, by its frame 33, on the fastener 1 at the of the support zone 3. And the frame 33 is fixed to the fastener 1 at its attachment zone 4 for example by means of a through screw 35a. The screw 35b located on one side of the module is positioned above the level of the screw 35a located on the other side of the module so that when making the building cover, the frames 33 of the modules 30 of two adjacent assemblies 40 can be in contact support. Alternatively, the screw 35b is positioned in front of or behind the cutting plane of FIG. 5. This contact support is also made possible by the position of these frames 33 relative to the truncated ribs 21a, 21b. As can be seen in FIG. 5, the photovoltaic cells 34 are in contact support on the support zone 8. This support zone 8 reinforces the mechanical strength of the assembly, thus making it possible to walk on the photovoltaic cells during the assembly of the roof or maintenance thereof. In FIG. 5, an electrical connector 41 is connected to the photovoltaic cells 34. The electrical connectors are elements known per se which are generally pre-assembled by gluing and electrically connected with the photovoltaic cells 34 during the manufacture of the cells. As visible in this figure, the connector 41 is provided with two connection terminals 36, 37 which make it possible to connect in series, as in parallel, the photovoltaic cells of two adjacent modules by means of cables 38, 39. To make an assembly 40 such as that represented in FIG. 4 comprising two modules 40 fixed to a sheet 20, it suffices to position the fasteners on the sheet 20, to fasten them to this sheet, for example by screwing, of their respective fastening zones 6, 11 (FIG. 3) then to position the frame of the module 33 on the support zone 3 of the fastener 1, and finally to secure the module 30 to the fastener 1 by screwing to the level of the fixing zones 4 provided for this purpose. The fastener 1 will have been previously configured so that the photovoltaic cells are resting on the support zone 8. Four fasteners per module are sufficient to ensure the strength of the system. It is understood that it can be used a number of fasteners greater than four.

The realization of such a workshop assembly promotes control of the tightness of the assembly at the first 6 and second 11 attachment areas.

This assembly 40 is then transported to the site where it is attached to the building structure.

Its transport is easy because of the configuration of the assembly 40 since the width of an assembly stack will correspond to the width of the corrugated sheet 20.

Finally, the installation on site is also simple since achieved by covering the side edges of the adjacent sheets and securing these edges, as is currently the case when producing a dry cover made only of ribbed sheets. Sealing between two adjacent sheets is ensured.

The presence of the first 6 and second 11 attachment zones only in areas of the sheet remote from the frame 33 of the module makes it possible to put two adjacent modules in contact support when covering the lateral edges or ends of two adjacent sheets. This contact support between the modules makes it possible to increase the energy efficiency of the installation.

In addition, the fastener, as described above, offers the installation the following advantages:

the frames 33 of the modules 30 of two adjacent assemblies 40 being in contact support and the through screws 35a, 35b being located on the side of the module, the disassembly of a criminal module is made particularly difficult. This contributes to the sustainability of the installation. - The holes made in the ribbed plate 20 to ensure the attachment of the fastener 1 are made in areas not subjected to the circulation of water along the sheet in case of bad weather. Moreover, the seal at these orifices is preserved by the presence of the seals.

Of course, the fastener of the invention as well as the assembly can be made for modules other than photovoltaic modules, such as, for example, solar thermal modules, sandwich panels, facings cassette type facade.

Of course, the fastener of the invention and the assembly can be made for ribbed sheets of different configuration than that presented in the previous example. The fastener will be adapted to the geometry of the ribs and beaches. In particular, the parts 6, 11 and 12 of this fastener will fit the ribs. It is also possible to consider replacing the ribbed sheet with a sandwich panel.

It can also be expected that the ribbed plate is already the building cover and that the fasteners and modules are fixed on the existing cover.

Claims

1. Attachment part of a module (30) on a ribbed sheet (20), made of an alternation of ribs and beaches and having lateral edges that can be engaged, comprising:

at least first (6) and second (11) fastening zones of said part (1) on said sheet (20),

an overhang (2) comprising at least one attachment zone of the module (4) located in a plane set back from the lateral edges of the sheet (20), said overhang allowing the assembly of two adjacent sheets by covering their side edges.

2. Fixing piece according to claim 1 characterized in that it is intended for a single module (30).

3. Fixing piece according to any one of claims 1 or 2 comprising a photovoltaic cell support zone (8) when the module (30) is a photovoltaic module made of a frame (33) carrying photovoltaic cells (34). ), this support zone (8) being located between the first (6) and second (11) fastening zones of the sheet.

4. Fastening piece according to any one of claims 1 to 3 wherein said first attachment zone (6) is an oblique portion for fixing said part (1) on the side (26) of a rib of said sheet metal (20).

5. Fixing piece according to any one of claims 1 to 4 wherein said overhang (2) further comprises a support zone of the module (3).

6. Assembly of at least one module with a ribbed sheet made of an alternation of ribs and beaches and having lateral edges that can be engaged, said assembly comprising at least two fixing pieces (1) which solidarize the module ( 30) to the sheet (20), said parts (1) being according to any one of claims 1 to 5.

7. An assembly according to claim 6 wherein said sheet (20) has lateral edges (23,24) consisting of ribs or truncated ribs (21a, 21b) allowing a sealing between the edges lateral (23,24) of two adjacent plates (20), and for which said overhang (2) is located above the level of the top of the ribs or truncated ribs (21a, 21b) of the plates (20) which participate in the overlap to allow said waterproof covering when at least one of said sheets is secured to a module (30).

8. Assembly according to claim 7 for which said fasteners

(1) extend from the truncated rib (21a, 21b) of either one of the side edges (23,24) of the sheet (20) to an adjacent rib

(21) of the same sheet (20).

9. Building cover comprising a plurality of assemblies, said assemblies being according to any one of claims 6 to 8.

10. A method of manufacturing a building cover according to claim 9 wherein:

- A first assembly is provided with at least one module, a corrugated sheet made of an alternation of ribs and beaches and having side edges that can engage and at least two fasteners (1) which solidarize said module (30) to said sheet (20),

This assembly is secured to the structure of the building to be covered, a second assembly is engaged in the first by overlapping their lateral edges and more precisely by contacting the truncated rib (21a) of the ribbed plate of the second assembly on the truncated rib (21b) of the ribbed plate of the first assembly, the two adjacent modules then being in contact support, - the two truncated ribs (21a, 21b) are secured.