FR3088666A1 - Roofing system comprising frames covered with stretched canvas and connected to each other by junction elements to improve sealing - Google Patents

Abstract

The present invention relates to a roofing system comprising at least two planar frames (3) made up of straight sections and forming a closed polygon. , said straight sections having a flank oriented towards the outside of the frame comprising a groove (9). The profiles have means for tensioning a canvas (4) extending inside the closed shape of each frame and on the face of the frame facing outwards, the two straight profiles of two neighboring frames are placed. one next to the other. The system further comprises a joining element (5) which is inserted between the two profiles of two neighboring frames and extends over the entire length of said profiles. This joining element consists of a flat lip extending transversely on each fabric stretched over the outwardly facing surfaces of the two frames and of a hook-shaped part (6) having two wings extending transversely, a first wing fitting into the groove (9) of the side of a profile and the other wing fitting into the groove (9) of the side of the other profile. Figure 3

Description

Description

Title of the invention: Roofing system comprising frames covered with stretched canvas and connected together by junction elements to improve sealing

1. Field of the invention The field of the invention is that of making premises using panels consisting of a frame covered with a canvas stretched on at least one side, placed and fixed on a support structure, or metal, in particular aluminum.

The invention relates more specifically to the fact that the frames are placed side by side by inserting a junction element which is inserted in a branch and which improves the seal between the panels.

2. TECHNOLOGICAL BACKGROUND [0003] In the field notably of agriculture, leisure or events, it is often useful to build a room in one or more days to serve as shelters for crops, objects or people. These structures must be light and possibly anchored in the ground, by pegs, by stakes or heavy elements such as concrete studs. These premises may optionally be fitted with a floor which can also serve as an anchoring means for the uprights of a metal frame on which the roof is placed.

Similar to a tent, the frame is covered with stretched canvas panels forming a roof and possibly walls. The canvas on top is tilted enough to prevent rainwater from stagnating and tearing the canvas as it accumulates. The stretched canvas structures are pre-assembled or pre-assembled in the factory and are intended to be assembled or assembled on site after transport of the pre-assembled components, generally by truck, boat, etc. These structures have in particular the advantage of being more quickly and more easily assembled, of being less expensive and of being able, if necessary, to be dismantled after use to be reassembled elsewhere or at another period, for example within the framework of a periodic event. In addition, the constituent elements used for the assembly of such structures such as beams, lattice beams, etc., are often standardized elements which thus allow a certain modularity, for example for extension or enlargement works. Even more precisely, the present invention relates to the field of assembly of stretched canvas panels usable for the construction of this type of structure or similar types of structures. The tents or structures in stretched canvas are generally made up, either in the form of light dismountable constructions implementing canvases or tarpaulins stretched on a dismountable infrastructure, or in the form of heavy constructions, whose load-bearing elements are sealed in the ground and often integrated into the cover. Most of the time, removable light constructions meet the need for removable cover.

The canvas is generally stretched over a frame formed by straight sections forming a preferably rectangular frame. These sections have a longitudinal groove intended to receive one side of the fabric. The fabric is then immobilized by an insert entering to force into the antlers, and is kept wedged between the sides of the antlers and the sides of the insert. The insert is made of plastic so as to give it the elastic characteristics required for its insertion. The insert can have an omega shape with on the one hand a rounded part capable of being forcefully inserted into the antlers of the chassis and remaining immobilized there, and on the other hand of the legs connected to the rounded part so to form the base of the omega, capable of being pressed against the face of the chassis at the level of which the antlers open. In addition, holding means are provided, in the form of a cylinder capable of being disposed between the legs of the omega in order to avoid their coming together and the withdrawal of the antler insert.

[0006] Such systems can also be used to constitute advertising panels comprising stretched fabrics with images printed on them. These panels may show images from both sides. In the case of advertising panels, there is no sealing constraint which is not the case for premises where the stretched canvas serves as a roof. If these rooms are large, the amount of rainwater must be removed by specific means so as not to drain into the room, both at the roof and at the walls. The installation of these means of evacuation should not significantly increase the installation time of the room, and require intervention at height for an operator.

3. Objectives of the invention [0007] There is therefore a need to make available a structure forming a room whose walls and / or roof are made of a stretched canvas, requiring rapid installation and disassembly and limiting interventions at staff height, while ensuring a good seal against rain.

Also, the present invention aims to overcome the drawbacks of the prior art by proposing a roofing system comprising a plurality of stretched canvas panels and devices interposed between the panels to ensure optimal and resistant fixing in the time, as well as a good seal.

4. Presentation of the invention According to the invention, a roofing system is thus proposed comprising at least two planar frames made up of straight sections and forming a closed polygon, said straight sections having a side facing outwards. of the frame having a groove. The profiles have means of tensioning a canvas extending inside the closed shape of each frame and on the face of the frame facing outwards, the two straight profiles of two neighboring frames are placed one next to each other. The system further comprises a joining element which is inserted between the two profiles of two neighboring frames and extends over the entire length of said profiles. This joining element consists of a flat lip extending transversely on each fabric stretched over the outwardly facing surfaces of the two frames and of a hook-shaped part having two wings extending transversely, a first wing fitting into the groove of the side of a profile and the other wing fitting into the groove of the side of the other profile.

Thus, the invention ensures a good seal between two neighboring frames and easy assembly by avoiding an operator to climb on the canvas during the construction of the room.

According to a first embodiment, the junction element is fixed to a profile by means of assembly of the hook-shaped part on the side of this profile. In this way, the connecting piece is first fixed to a profile before the two profiles are joined, thereby facilitating assembly.

According to another embodiment, the assembly means is a screw passing through a hole made in the hook-shaped part. In this way, it is easy to fix the joining element.

According to another embodiment, the roofing system comprises a screw provided with an elongated head, a tongue pierced with at least one hole for the passage of the screw and a nut, the screw head and the tongue enclosing by means of the nut the parts of the two sections lying below the grooves of the two neighboring frames, the width of the elongated head of the screw being less than the distance between the two sections once the roof is fixed. In this way, the joining of the profiles together can be carried out from inside the room during assembly, without having to climb on it.

According to another embodiment, the fabric tensioning means consist of grooves made in the upper face of the frame and covered by the flat lip of the junction element, the fabric being held taut by an insert housed in force in said grooves.

According to another embodiment, the means of tensioning the fabric consist of grooves made in the side of the profiles oriented towards the outside of the frame, the fabric being held taut by an insert being housed in force in said grooves . In this way, the planar lip of the joining element is small.

According to another embodiment, the roof comprises a double fabric. In this way, the housing under the roof is better protected.

According to another embodiment, the roofing system comprises a junction piece provided with two open housings having openings symmetrically opposite to each other, each opening being intended to receive the profiles of the two frames when the directions normal to the planes of these two frames have different orientations. In this way, the seal between two panels with different orientations is improved.

According to another embodiment, said junction piece consists of two pieces each having an opening and of symmetrically opposite shape, the two pieces being fixed together by the plane located on the side opposite to their opening. In this way, it is possible to use a piece to fix the roof against the facade of a wall.

5. Description of the figures [0019] Other characteristics and advantages of the invention will appear on reading the following description, given by way of non-limiting example, and of the appended drawings, in which:

- [Fig 1]: Figure 1 is an example of a room equipped with a roof implementing the object of the present invention;

- [Fig 2]: Figure 2 shows an example of assembling two frames of the same orientation by a junction element according to a particular embodiment;

- [Fig 3]: presents an example of a diagram of a junction element between two frames of the same orientation;

- [Fig 4]: presents in a perspective view of the joining of two neighboring frames according to a particular embodiment;

- [Fig 5]: presents an example of a perspective view of a junction piece between two frames having different orientations;

- [Fig 6]: presents a sectional view of a junction piece presented by the previous figure and fixed to a facade;

- [Fig 7]: shows an alternative embodiment of a junction element between two frames forming a plane in a sectional view.

6. Detailed description of the invention In all the figures in this document, the identical elements are designated by the same reference.

The general principle of the technique described is based on the realization of a roof 1 on walls 2 to constitute a room. The roof is made of canvas or plastic covering stretched over at least two frames placed in an inclined position above the ground to promote the flow of rainwater. If the room thus formed by the roof has a wall, these can also be produced by stretched canvas frames and assembled according to the invention. The room can be used as greenhouses, temporary buildings for events, for communities or leisure, or even for a pergola, a garage or any shelter for activities, people or objects. Fig. 1 shows a particular example of a room with a double roof: a first roof whose perimeter is located directly above the walls, and a rectangular attic placed above a vertical entablature made up of windows for example. This room has a framework made up of metal profiles anchored or placed on the ground and joining in height to form the roof frame. The flat surfaces of the walls and the roof are made of stretched canvas which is waterproof and possibly translucent. The canvas can be replaced by a translucent or colored plastic coating, and treated with anti-ultraviolet to avoid the greenhouse effect and the rise in temperature.

The frames are made up of several straight profiles assembled together to form a closed shape such as a rectangle or any other polygon, such as triangles or trapezoids. The canvas is then stretched and fixed to the frame so as to form flat and sufficiently rigid panels. These panels are produced in the workshop and transported to the site before being mounted on the supporting structure. To increase the covered area, it is necessary to assemble several so-called "neighboring" panels side by side, ensuring both the solidity of the assembly and the watertightness of the junction.

[0023] FIG. 2 shows an example of junction between two frames 3 whose plane of the surfaces merge, these frames constitute a flat roof surface located vertically on one of the four walls of the room shown in FIG. 1. According to this embodiment, the so-called “double” fabric 4 is stretched on each side of the frames, which improves the holding of the frames and allows better thermal insulation. To seal the connection between two neighboring frames, a junction element 5 covers the top of the edges of the two frames. In the case of a frame provided with a double fabric, these two fabrics can be of different type, for example, that directed inside can be of micro-perforated acoustic type, to dampen the sounds emitted inside from the local.

Referring to FIG. 3, there is shown a diagram of the junction between the profiles of two neighboring frames 3, according to an exemplary embodiment. The section of the profiles of the frames is advantageously rectangular, three of the four sides of these profiles have grooves extending longitudinally. The frame profiles are first assembled by interlocking, and by crimping, welding or screwing, possibly using straight or oblique inserts. Once the frame is mounted, it is laid flat on a work surface; the canvas is then stretched by hand and covers the groove 7, the direction of the opening of which is perpendicular to the plane of the frame and preferably directed upwards. Then, an operator places an insert 8 (also called a “rod”) on the canvas vertically above the antlers and exerts a strong downward pressure to introduce it into the groove, which has the effect of jamming the canvas. between said insert 8 and the sides of the antler 7. Inserts and the way of covering the frame with a stretched fabric are described in particular in patent application EP 1 809 913 filed by Mr. Lapouge. In the case of a frame with a double canvas, the first is fixed on the surface of the frame, the latter is then turned over to fix the second on the other side.

As shown in FIG. 3, the junction element 5 comprises a flat lip intended to cover at least the edges of the two profiles of the two frames 3 and to exert pressure on the fabric 4 to press it against the surface oriented towards the outside of the room 1. This surface is oriented upwards in the case of a roof and towards the outside of the room in the case of walls. The joining element extends under the flat lip of a hook-shaped lip 6 also extending longitudinally. The side of the profile facing outwards has a third groove 9 which receives the hook-shaped part 6 of the joining element. The hook shape has two wings which are inserted one in the third antlers 9 of a profile of one of the two frames and the other in the third antlers 9 of the other frame. The surfaces of the wings directed towards the planar lip of the joining element exert pressure on the upper horizontal flank of each branch 9. This pressure is transmitted to the planar lip by pressing it on the surface of the profiles and wedging the fabric 4 between the lip and said surface. In this way, the junction of the fabrics 4 of the two neighboring frames is sealed.

The joining of the profiles of two neighboring frames is effected by the use of screws 10 provided with an elongated head (also called "hammer head screw"), for example oblong or rectangular, with a tongue 11 pierced with at least one hole for the passage of the threaded part of the screw 10 and a nut 12. The elongated head of the screw has a width less than the distance between the two profiles of the frames 3, so as to be able to slide between the profiles. This distance being represented by the letter "d" in FIG. 3. The head 10 and the tongue 11 enclose by means of the nut 12 the parts of the profiles located below the grooves 9 of each neighboring frame. As described above, the various panels consisting of the frame and the stretched fabric are first mounted on the supporting structure. The operator is then positioned under the frames and slides the elongated head of the screw 10 between the frames to be joined. Then he turns the screw 90 ° so that it is positioned as shown in Fig. 3, and places the tongue 11 and the nut 12 which can then be screwed. In this way, the operator can securely secure the various panels by being below, which is safer for him. The screw 10 and the tongue 11 also makes it possible to secure the parts of the profiles located below the grooves 9 with profiles of the support structure, and thus ensure the attachment of the roof to this structure.

According to an improvement, during assembly, the joining element 5 is first fixed to a frame 3 by means of a screw 13 which passes through a hole made in the hook-shaped part 6, or by self-drilling and is screwed into the mass of the profile of the frame 3. Then, the neighboring frame is approached and the hook-shaped part 6 is inserted into the groove 9 of this frame. Following these two operations, the two frames can be secured together by means of the elongated head screw 10, the tongue 11 and the nut 12. The hook shape has an opening directed upwards and extends longitudinally over the entire length of the two frames 3. Because of its particular shape and its inclination, the hook shape of the junction element constitutes a gutter which can evacuate the water (rain or condensation) which would have lodged in the volume between the two profiles. The water flowing in this hook shape emerges at the bottom of the panels located on the periphery of the roof and falls to the ground or is evacuated by gutters placed all around the panels.

[0028] FIG. 4 shows the joining of two neighboring frames according to a particular embodiment. The joining element 5 has an upper lip extending transversely over the profiles of the neighboring frames 3 and provided with an elastic bead extending under the ends in the direction of the grooves 7 formed on the upper surface of the profiles and designed to tension and block the canvas 4. These beads, being crushed, improve the tightness of the junction between the frames.

The perspective view also highlights a way of manufacturing the profile forming the frame 3. As can be seen in the figure, the frame profile consists of three tubes of rectangular section which are glued to each other , a central tube serving as structural reinforcement and joining the two other tubes which have a longitudinal opening constituting the grooves 7. The “U” shape produced by the fixing between them of the three tubes produces the groove 9 in which the wings of the hook part of the joining element 7.

According to an alternative embodiment, the grooves 7 are not located on the face of the profiles parallel to the surface of the stretched fabric 4 but are formed in the side of the profiles oriented towards the outside of the frame, the surface of these sides being perpendicular to the surface of the stretched fabric when the profiles have a rectangular section. In this way, these grooves are hidden in the thickness of the profile and there is no need to cover them with the planar lip of the joining element 5, this lip then being able to be narrower and more beautiful. aspect.

[0031] FIG. 5 describes an example of a diagram of a connecting piece between two frames having different orientations. When a roof has at least two different slopes, as is the case of the roof illustrated in Fig.l which has four planes allowing the flow of water in four different directions, the roof has edges, that the highest is called the ridge. The directions normal to the planes of two frames on each side of an edge have different orientations. The junction between these frames must take into account the orientations while continuing to ensure a good seal.

The joining of two frames at an edge is effected using a connecting piece. Several models of connecting pieces exist depending on the angle between the normal directions of the planes of the two frames located on each side of the edge. As shown in Fig. 5, the junction piece 20 comprises two open housings having openings 21 which are symmetrically opposite and which are intended to receive the profiles of two frames having different orientations. The angle formed by the orientations of the two openings 21 is less than 180 ° and is approximately equal to that between the normal directions of the planes of these two frames. The opening has a stuffing gasket 22 at the bottom and a gasket formed by extruded rubber 23 at the top. The joint 23 is exposed to air and to the weather and must have better resistance over time than the joint 22 which is placed under the roof and therefore does not require any particular protection. The frame 3 is inserted between the two seals, slightly crushing them in order to ensure good water tightness, the seals 22 and 23 being brought into contact with the stretched fabrics on both sides of the frame and the fixing profiles, aluminum for example. The thickness and elasticity of the joints and the fact that it is not necessary to introduce the frame beyond the joints, allow a certain flexibility concerning the angle between the two frames. The prototype shown in Figs. 5 and 6 make it possible to assemble two frames whose angle between the planes varies by 30 °.

The junction piece 20 is advantageously made up of two elementary pieces each having an opening 21. These elementary pieces have a symmetrically opposite shape and are fixed together by the plane located on the side opposite to the opening 21. The fixing can be done by screwing or / and gluing. These elementary parts can thus be individually usable by fixing the plane situated on the side opposite the opening 21 to a wall and by introducing a frame in the opening 21. In this way, it is possible to easily create a roof backed by a wall. Fig. 6 presents a sectional view of a single elementary part which composes the junction part presented in the previous figure. This elementary part is fixed to a visible facade on the right of FIG. 6. We can see the particular shape of the section of the seal 23 in extruded rubber. This seal includes in particular a lip situated in the part directed towards the outside, the end of the lip exerting a pressure on the fabric to improve the sealing.

Fig.7 shows an alternative embodiment of a connecting element between two frames forming a plane in a sectional view. According to this variant, the grooves 9 formed on the side of the profiles which is oriented towards the outside has a narrow opening which will widen as one enters the groove. The joining element 5 has a lip intended to cover the edges of the two profiles of the two frames 3. This lip is made of elastic material and has a curved profile. In this way, the edge of the lip exerts pressure on the two fabrics when the junction element is correctly positioned.

The junction element 5 extends under the flat lip of a rod 24 which widens at the height of the openings of the two grooves 9 of the two frames placed opposite. Each enlargement constitutes a split spike to form at its ends at least two elastic tabs, these tabs comprising a flat which abuts against the narrow part of the opening and serves as a retainer for removing the spike. In this way, the junction element ensures a good connection between the frames constituting the roof and ensures a good seal of Injunction between frames.

According to a preferred embodiment, the present invention can be used for a roof system comprising several frames covered on two sides with a stretched canvas, which in no way excludes, in the context of the present invention, from cover only one side of the frames, the one facing the outside of the room.

The assembly according to the invention of panels made of canvas stretched over frames allows the mounting of roofing, but also of walls placed outside or inside a room.

Although described through a number of detailed exemplary embodiments, the proposed devices include different variants, modifications and improvements which will be apparent to those skilled in the art, it being understood that these different variants, modifications and improvements form part of the scope of the invention, as defined by the claims which follow. In addition, different aspects and characteristics described above can be implemented together, or separately, or else substituted for one another, and all of the different combinations and sub combinations of aspects and characteristics are part of the scope of the 'invention. In addition, some devices described above may not incorporate all of the modules and functions provided for the embodiments described.

Claims (1)

Claims [Claim 1] Roofing system comprising at least two planar frames (3) made up of straight sections and forming a closed polygon, said straight sections having a side facing outwards of the frame comprising a groove (9), the sections having tensioning means d 'a canvas (4) extending inside the closed shape of each frame and on the face of the frame facing outwards, the two straight sections of two neighboring frames being placed one next to the other; characterized in that the system further comprises a junction element (5) which is inserted between the two profiles of two neighboring frames and extends over the entire length of said profiles, said junction element (5) consisting of a lip plane extending transversely on each canvas stretched above the outwardly oriented surfaces of the two frames and of a hook-shaped part (6) having two wings extending transversely, a first wing fitting into the antlers (9) on the side of one profile and the other wing fitting into the antlers (9) on the side of the other profile. [Claim 2] Roofing system according to claim 1; characterized in that the joining element (5) is fixed to a profile by means of assembly of the hook-shaped part to the side of this profile. [Claim 3] Roofing system according to claim 2; characterized in that the assembly means is a screw (13) passing through a hole in the hook-shaped part. [Claim 4] Roofing system according to any one of the preceding claims; characterized in that it comprises a screw (10) provided with an elongated head, a tongue (11) pierced with at least one hole for the passage of the screw (10) and a nut (12), the screw head (10) and the tongue (11) enclosing by means of the nut (12) the parts of the two profiles located below the grooves (9) of the two neighboring frames, the width of the elongated head of the screw being less than the distance between the two profiles once the roof is fixed. [Claim 5] Roofing system according to any one of the preceding claims; characterized in that the fabric tensioning means (4) consist of grooves (7) formed in the upper face of the frame and covered by the flat lip of the junction element (6), the fabric being held taut by an insert lodged in force in said grooves (7). [Claim 6] [Claim 7] [Claim 8] [Claim 9] Roofing system according to any one of claims 1 to 4; characterized in that the means of tensioning the fabric (4) consist of grooves made in the side of the profiles oriented towards the outside of the frame, the fabric being held taut by an insert being housed in force in said antlers. Roofing system according to any one of the preceding claims; characterized in that the roof has a double canvas. Roofing system according to any one of the preceding claims; characterized in that it further comprises a junction piece (20) provided with two open housings having openings (21) symmetrically opposite one another, each opening being intended to receive the profiles of the two frames when the directions normal to the planes of these two frames have different orientations. Roofing system according to claim 8; characterized in that said junction piece (20) consists of two pieces each having an opening (21) and of symmetrically opposite shape, the two pieces being fixed together by the plane located on the side opposite their opening (21) .