EP0859104A1 - Roof scaffolding system - Google Patents

Abstract

The roof scaffolding has rigid modular wooden panels (1) with a flexible coating on one surface (2) which adheres to the roof. At regular intervals bars (5) are placed on the panel to provide better wedging of the worker's feet and facilitating his movement. On the panel side edges are corner irons (10,11) forming a guard rail. Two hooks (3) are provided in the upper part and two eyelets (4) are provided in the lower edge which enable connection to other modules. The flexible coating comprises a plastics foam having a resistance and thickness which allows a deformation to accommodate variations in the roof shape. The coating also enables pressure distribution over the maximum roof surface.

Description

The present invention relates to a roof scaffolding system, can be used either by roofers to work on roofs and roofs, or for plaster and plaster installers for making facades and mounting scaffolding on roofs if necessary.

It is known in the prior art to place ladders on roofs to allow roofers to intervene, in the case for example of repair of roofing. However, the ladder used presents a significant risk of falling for the roofer and on the other hand deterioration of the roof as well as the risk of slide from the roof.

Finally, a ladder does not allow to climb over a scaffolding.

The object of the invention is therefore to overcome the drawbacks of this art previous, by proposing a scaffolding system allowing a roofer to intervene in a simple way on a roof without risk of breaking tiles.

This is achieved by the fact that the roof scaffolding system, consisting of modular elements in the form of rigid panels provided, on a face of at least one flexible covering adhering to the surface of the roof and comprising on the face of the panel opposite to the face provided with the coating flexible, holding means facilitating the movement of workers, comprises on two of its opposite lateral edges at least one connecting means allowing a pivoting connection with an adjacent modular element.

According to another particular feature, the roof scaffolding system consisting of modular elements in the form of rigid panels provided on a face of at least one flexible covering adhering to the surface of the roof and, on the face of the panel opposite the face provided with flexible coverings, holding means facilitating the movement of workers, includes means quick connection to a scaffolding or roof ridge.

According to another feature, the resistance of the coating (s) flexible adhesives and their respective thicknesses are determined so as to allow deformation to absorb variations in shape of the roof on the one hand, and on the other hand, to obtain a distribution of pressures on the maximum roof area.

According to another particular feature, the adherent flexible coating consists of a layer of foam fixed to the panel, the foam having a density of 30 to 40 kg / m ³ to obtain sufficient crushing resistance.

According to another particular feature, the adherent flexible coating consists of a first layer of foam attached to the panel and a second layer of foam attached to the first layer, the first layer having a density of approximately 75 kg / m ³ and the second a density of 30 to 40 kg / m ³ .

According to another particular feature, the thickness of the layer or layers of foam is at least 20 mm.

According to another particular feature, the holding means for keeping the workers consist of at least one transverse bar integral with the panel surface.

According to another particular feature, the rigid panel and the bars are in wood or pressed or extruded metallic material.

According to another particular feature, the rigid panel and the bars are in molded plastic material.

According to another particular feature, the system includes means for connection to scaffolding or roof ridge.

According to another particular feature, the rapid connection means with the scaffolding consist of at least one stirrup secured to the panel on which a U-shaped collar is secured at least in translation and a tube clamping key on the collar intended to be inserted into holes provided in the collar.

According to another particularity the panels are provided with an angle on each of their two longitudinal edges, the stirrup (s) being fixed on the panel and / or on transverse bars integral with the surface of the panel and constituting the means for retaining the workers, the stirrups being located either astride the ends of the bars, or between the end of a respective bar and the angle iron located opposite the end of the bar.

According to another particular feature, the height of the stirrup (s) straddling the bars is substantially greater than the thickness of the bars, and a U-shaped collar is secured or less in translation with a first leg a U-shaped connecting piece, the U-shaped connecting piece being fixed to the bracket by the introduction and tightening of a second leg of the U-shaped connecting piece in holes formed in the part of the stirrup raised relative to the bar.

According to another particularity of the scaffolding tubes provided on their length of curved legs allowing the fixing of the tubes on the panel by the introduction and tightening of the curved legs of the tube in the holes of the respective stirrups.

According to another particular feature the system comprises tubes scaffolding provided on its periphery with at least one pair of legs curved and parallel to each other, allowing the lateral joining of two adjacent panels by the introduction and tightening of the two curved legs of each pair of tube lugs in the holes of pairs of stirrups respective consisting of two stirrups belonging to two panels adjacent.

According to another particular feature, the scaffolding system includes assembly elements each consisting of a rendered assembly part integral or less in translation with at least one U-shaped collar for fixing a scaffolding tube, the connecting pieces each having two legs spaced apart parallels intended to ensure the lateral joining of two adjacent panels by the introduction and tightening of the two legs in the holes in a pair of stirrups made up of two stirrups belonging to two adjacent panels.

According to another particular feature, the scaffolding system includes assembly elements consisting of an elongated assembly part rendered integral at least in translation with a U-shaped collar, the assembly part elongated being provided, substantially in the middle, with a cutout transverse to allow its mounting on two angles joined two adjacent panels the assembly part having holes allowing lateral securing of the two adjacent panels by the introduction and tightening of two keys in the respective superimposed holes of the part elongated assembly and two brackets belonging to the two panels adjacent.

According to another particular feature, the panels include a chute the along each angle, the stirrups or ends of the bars located opposite of a respective angle iron being slightly spaced from the latter by a distance corresponding to the width of the chute, the chute allowing in particular rainwater drainage and clipping on the clip angle U-shaped integral with an edge of at least one tarpaulin or protective fabric.

According to another particular feature, the means of connection with the ridge are made up of two modular elements hinged together and comprising each at least one means of connection with a scaffolding tube, said means of connection being made integral with the modular element, said tube having a hinged end with the tube integral with the other connecting means of the second modular element.

According to another particular feature, the connection means allowing a pivot connection between two adjacent modular elements are consisting of at least one hook-shaped piece located near a first side edge of the modular element and at least one shaped part eyelet disposed near a second lateral edge of the modular element, the hooks and eyelets being located symmetrically with respect to the edges longitudinal of the panel to allow the introduction of the hooks (3) of a second modular element in the eyelet openings of a first modular element.

According to another particular feature, the scaffolding system includes support bars mounted laterally on the panels, support bars being mounted by a first of their ends having a U-shaped section on a stirrup and being astride an angle by means of a formed housing in the thickness of the bar, the end of the bar disposed on a stirrup being provided with slots coinciding with the slots of the stirrups to allow the joining of the bar with the panel by the introduction of a key clamping in the aligned holes of the bar and the caliper, the second end of the support bar being made integral with a plate provided with a flexible and adherent coating intended to be in contact with the roof, the bar support being provided on its upper surface with at least one cylinder constituting a means of rapid connection to a scaffold, each cylinder being intended to accommodate a respective scaffolding tube threaded and / or fixed on the cylinder, the support bar allowing in particular the starting of a scaffolding and ensuring stability on the roof of the connected panels.

According to another particular feature, scaffolding tubes are fixed to the means of rapid connection to a scaffolding to constitute railings for workers, the railings being arranged longitudinally along a edge of at least one line of modular elements connected and or transversely compared to modular elements.

According to another particular feature, scaffolding tubes are fixed to the means of rapid connection to a scaffolding to constitute railings for workers placed transversely between two lines of elements modular assemblies.

According to another feature, the panel is made up of polyurethane and the flexible deformable coating consists of foam polyurethane, the angles of the panel being molded in a block with this last, the angles are interposed between the underside of the panel and the polyurethane foam covering, the lower ends of the angles being embedded in polyurethane foam covering or being folded over the lower edges of the covering.

Another object of the invention is to propose a method of mounting the scaffolding on a roof.

• à disposer d'une pluralité d'éléments modulaires reliés entre eux et rigides sur une face pour constituer une surface d'appui tout en étant déformable sur l'autre face qui est en appui sur le toit pour s'adapter aux variations de formes du toit et répartir la pression ;
• à fixer sur la face rigide des éléments de liaison avec les éléments de l'échafaudage.

This object is achieved by the fact that the method of mounting the scaffolding on a roof consists of:

• to have a plurality of modular elements connected together and rigid on one side to form a support surface while being deformable on the other side which is supported on the roof to adapt to variations in shape of the roof and distribute pressure;
• to be fixed on the rigid face of the connecting elements with the elements of the scaffolding.

According to another particular feature, the method consists in securing the plurality of elements at the roof ridge by an articulated element whose articulation blocks by blocking means.

According to another particular feature, the method consists in securing the plurality elements to a bar of a facade scaffolding resting on another area.

• la figure 1 représente une vue en perspective de l'élément modulaire selon l'invention dans un premier mode de réalisation,
• la figure 2A représente une vue en perspective des premiers moyens de liaison de l'élément modulaire avec des éléments d'échafaudage ;
• la figure 2B représente des seconds moyens de liaison de l'élément modulaire avec des éléments d'échafaudage;
• la figure 3 représente une vue de côté d'un élément modulaire sur lequel un début d'échafaudage est monté ;
• la figure 4 représente une vue de côté d'élément modulaire d'arrimage au faítage d'un toit ;
• les figures 5A à 5C représentent les vues de côté, de face, de dessus des représentations schématiques des utilisations de l'invention ;
• les figures 6A, 6B et 6C représentent respectivement les vues de côté, de face et de dessus d'une représentation schématique d'une autre utilisation de l'invention,
• la figure 7A représente une vue en perspective et partielle d'un élément modulaire dans un second mode de réalisation de l'invention,
• la figure 7B représente une vue en perspective d'une variante de réalisation des moyens de liaison de l'élément modulaire avec des éléments d'échafaudage,
• la figure 7C représente une vue de côté et en coupe de l'élément modulaire de la figure 7A sur lequel est fixée une bâche de protection,
• les figures 7D et 7E représentent respectivement des vues en perspective d'autres variantes de réalisation selon l'invention des moyens de liaison de l'élément modulaire avec des éléments d'échafaudage,
• les figures 8A et 8B représentent des vues partielles respectivement en perspective et en coupe illustrant l'assemblage de deux éléments modulaires, dans une direction transverse par rapport à l'axe de symétrie longitudinal de ces derniers,
• les figures 8C et 8D représentent des vues en perspective de deux variantes de réalisation selon l'invention des moyens d'assemblage de deux éléments modulaires, dans une direction transverse par rapport à l'axe de symétrie longitudinal de ces derniers,
• les figures 9A et 9B représentent des vues partielles respectivement en perspective et en coupe d'un élément modulaire dans une troisième variante de réalisation de l'invention,
• les figures 10A et 10B représentent des vues partielles respectivement en coupe et en perspective illustrant d'une quatrième variante de réalisation de l'invention,
• la figure 11 représente une vue en perspective illustrant l'utilisation de l'invention pour la réalisation de garde-fous pour ouvriers.

Other features and advantages of the present invention will appear more clearly on reading the description below made with reference to the accompanying drawings in which:

• FIG. 1 represents a perspective view of the modular element according to the invention in a first embodiment,
• FIG. 2A represents a perspective view of the first means of connection of the modular element with scaffolding elements;
• FIG. 2B represents second means for connecting the modular element with scaffolding elements;
• FIG. 3 represents a side view of a modular element on which a start of scaffolding is mounted;
• Figure 4 shows a side view of modular element for securing to the roof ridge;
• FIGS. 5A to 5C represent the side, front and top views of the schematic representations of the uses of the invention;
• FIGS. 6A, 6B and 6C respectively represent the side, front and top views of a schematic representation of another use of the invention,
• FIG. 7A represents a perspective and partial view of a modular element in a second embodiment of the invention,
• FIG. 7B shows a perspective view of an alternative embodiment of the means for connecting the modular element with scaffolding elements,
• FIG. 7C represents a side view in section of the modular element of FIG. 7A on which a protective cover is fixed,
• FIGS. 7D and 7E respectively represent perspective views of other alternative embodiments according to the invention of the means of connection of the modular element with scaffolding elements,
• FIGS. 8A and 8B show partial views respectively in perspective and in section illustrating the assembly of two modular elements, in a direction transverse to the longitudinal axis of symmetry of the latter,
• FIGS. 8C and 8D represent perspective views of two alternative embodiments according to the invention of the means for assembling two modular elements, in a direction transverse to the longitudinal axis of symmetry of the latter,
• FIGS. 9A and 9B show partial views, respectively in perspective and in section, of a modular element in a third variant embodiment of the invention,
• FIGS. 10A and 10B show partial views, respectively in section and in perspective, illustrating a fourth variant embodiment of the invention,
• Figure 11 shows a perspective view illustrating the use of the invention for the production of railings for workers.

The invention will now be described in conjunction with FIGS. 1, 2A and 2B.

The invention consists, as shown in Figure 1, of elements modular with a rigid surface (1) on the back of which is associated a surface of deformable material (2) whose rigidity and thickness are studied to allow it to deform under the weight of workers and scaffolding to absorb variations in roof shape and distribute uniformly pressure on the roof tiles. The rigid surface can be made for example of wood panels, such as plywood said 〈〈Marine〉〉 resistant to rain and the deformable material may be, for example, a polyurethane foam having a density of 30 to 40 kilos per cubic meter, to obtain sufficient crush resistance, and a thickness greater than 20 mm. This polyurethane foam is made secured to the panel (1) by any fixing means such as gluing or other technical. In the case of bonding to wood, metal or plastic, we use a contact adhesive compatible with the deformable material and support.

On the panel (1), bars are arranged at regular intervals (5) allowing a better wedging of the foot, which will prevent the worker from slipping and will facilitate at the same time the fixing of means of connection with elements scaffolding. On the side edges of the panel (1) are fixed angles (11, 10) forming a railing, these angles coming to be interposed between the face bottom of the panel (1) and the deformable material (2). Any other device making it possible to constitute an angle iron and constituted for example by a profile straight attached directly to the wooden, metal or plastic panel can also be considered. Each modular element has in its part upper, near the edges of the angles, two pieces (3) in the form of hook oriented upwards and, at its lower edge, two shaped parts (4) eyelet arranged with the same spacing as the hooked parts (3) and slightly oriented upwards to allow the introduction of the hooks (3) of a second modular element in the openings of the eyelets of the first modular element. The modular elements will have for example a width from 50 to 70 cm and a length from 1 to 1.20 m and will include bars (5) in sufficient number and spaced at regular intervals to allow the worker to move easily on the surface thus formed on the roof.

The roofer can thus, by using these elements modular, constitute a work surface from a ladder placed at edge of the roof or scaffolding installed on the facade. For this the worker deposits on the roof a first panel which naturally, by the deformable element, will adhere to this roof and allow the worker to climb on it to then hang a second modular element and, by pivoting the eyelet around the hook, bring the second modular element into contact with the roof.

By combining the different modular elements, the worker will be able to thus constitute a surface making it possible to move along a line of roof slope. If he wishes, he can widen this area by associating side by side several lines of modular elements.

In a first variant, the modular elements are rendered integral with stirrups or flanges (6) which, as shown in FIG. 2B, are drilled with holes (60) parallel to the surface plane (1), these holes (60) allowing the insertion of a key (67) to fix a stirrup (76, 77) supporting a collar (7). The bracket (76, 77) is also provided with holes (760, 770) for ensuring the connection with the key (67) and the flange (6). The U-shaped bracket (7) has, near the free end of the legs of the U, a orifice (70) on one leg and on the other leg an orifice (71) in which a tongue (72) is projecting. These orifices (70, 71) are of shapes and sizes suitable for receiving a hollow key (8) whose weak end dimension (81) can be introduced into the opening (71) by tilting. The key (8) then slides until entering the hole (70) to tighten in force a scaffolding tube (9) which would have been placed in the collar (7).

The panels thus equipped can be used both for roofers when removing the stirrups which can constitute obstacles to walking of the roofer and still allow the roofer to tie the panel located in roof edge with scaffolding incorporating a stirrup connecting with the panel and linking this stirrup to a scaffolding tube.

In a second variant, FIG. 2A, the panels are equipped with removable flanges (6) fixed to the panel by screws arranged in the two flange holes (60). The flange is made integral at least in translation of the collar (7) by a rivet placed in the orifice (73) of the collar and the orifice (61) of the flange to allow pivoting of the collar.

The collar is for the rest identical to that of the first variant and cooperates with a key to fix the scaffolding tubes allowing connect several lines of panel together, for example, or connect a panel line to scaffolding.

In another variant, not shown, the collar (7) can be mounted pivotable, thanks to a rivet mounted in a hole in the collar and a stirrup (76, 77) of the type of FIG. 2B, fixed by a key (67) on a flange (6) of the type Figure 2B.

The use of the modular element to mount a scaffold is shown in Figure 3 on which we can see the roof elements (20) constituted for example by flat tiles on which the flexible adhesive coating (2) of the modular element and the rigid panel (1). On the rigid panel (1) the connecting elements (7) with the tubes are made integral with the panel (1) and horizontal tubes (95).

On these horizontal tubes (95) are mounted vertical tubes (91, 93) connected to these horizontal tubes (95) by connecting elements (75) classics, such as those usually used in scaffolding. A bar or tube (92), arranged at an angle between the vertical tubes makes it possible to adjust the parallelism between the vertical tubes (91, 93). Then the rest of the vertical scaffolding is constituted in a conventional way, like all scaffolding resting on a flat surface.

Another part of figure 3 represents the bond of the element modular (1, 2) by the lower horizontal tube (95) with a horizontal tube (94) extending a vertical scaffolding, the last tube of which can be seen vertical (96) close to the facade. The scaffolding tubes (94, 96) are made integral by conventional connecting means (75) in the scaffolding and the tube (94) is made integral with the tube (95) also by a connecting means (75) conventionally used in scaffolding.

It is thus understood that the user can constitute a flat surface on a roof allowing to distribute the pressures and to leave with a scaffolding on this surface while ensuring good security because this surface adheres on the one hand to the roof and is on the other hand made integral with a scaffolding installed on the facade.

Another mounting variant allows the user to start from a stowage performed on the roof ridge. For this variant, the user uses the material shown in Figure 4, consisting of a modular element (13, 12) of two modular parts (12, 13) connected together by a joint (14) of which the angle may vary.

Each of the modular parts (13, 12) has a flange (6) on which is mounted a stirrup (7), the flange (6) being made integral with a bar (5) disposed near the joint. Two tubes (97, 98), articulated by an adjacent end in a joint (99) are placed in the U-shaped brackets associated with each panel, one (98) for the first panel (13), the other (97) for the second panel (12). The keys (8) are then introduced into the collars (7). Once the keys are locked in the collars, the assembly constitutes a means of blocking the articulation (14) of the modular parts (13, 12). In this way, the device is secured to the ridge and the user can then join the ends of the modular parts (12, 13) other modular elements, so as to descend a line of panels on each slope of the roof, as shown in Figures 6A-6C.

As a result, the user can tie down the lower end of the elements modular arriving at the edge of the roof to a scaffolding (64, 62) starting from the ground. The user can then use the modular elements based on the roof to also support part of the upper scaffolding (63) intended to cover a pinion, as shown in Figure 6B.

Another example of use of the principle of the invention is given by Figures 5A-5C on which we can see several lines (1a, 1b, 1c) resting on a roof slope and interconnected by scaffolding upper (51) resting on these lines of modular elements. Each of lines of modular elements is connected to a vertical scaffolding (50) which rests on the ground.

The scaffolding system thus described and its principles of use allow on the one hand to avoid deterioration of roofs and on the other hand ensure greater security for workers and finally allow contractors to easily scaffold on buildings with roof line breaks with facade portions overlooking these roofs, to work on these facades.

Of course the embodiment described above is by no means limiting. Thus, the rigid panels can be made of wood and the lower part foam but we could just as well realize the rigid part as well as the bars by a set of molded plastic material on which deposit a coating of synthetic material having the qualities suitable for friction adhesion and good distribution pressure on the roof. Similarly, another possibility is to constitute the panel (1) from a metallic material stamped so as to form directly the bars as well as the angles (11) in the material metallic. The metallic material is then coated or made integral with a suitable adhesive material.

Advantageously, the flexible and adherent coating of the panels (1) may consist of a first layer (2) of foam fixed on the panel (1) and of a second (22, FIG. 7A) layer of foam fixed on the first layer (2). The first layer (2) has for example a density of approximately 75 kg / m ³ and the second (22) a density of 30 to 40 kg / m ³ .

Figures 7A and 7C show partial views of an element modular (1) in a second embodiment according to the invention. The same elements as those described above are designated by the same digital references. The panel in Figure 7A differs from that in Figure 1 in particular by the shape of the connecting means (6, 170, 7) of the element modular (1) with scaffolding elements. The stirrups (6) of the panel Figures 7A and 7C are fixed on the panel (1), straddling the ends bars (5) and the height of the stirrups (6) is substantially greater than the thickness of the bars (5). The stirrup (6) is provided, in its raised part relative to the bar (5), two slots (161, 162) parallel and contained in a plane parallel to the plane of the panel (1). The two slots (161, 162) are opposite and have lengths equal to L1 and L2 respectively, L1 being greater than L2. The two slots (161, 162) of the stirrup (6) are intended to allow mounting on the stirrup (6) of means (170, Figure 7D; 7A-7B, Figure 7E) connecting the modular element with scaffolding elements. These connecting means of the modular element with scaffolding elements for example consist of a collar (7, Figure 7D) in U is made integral in translation of a first (171) leg of a U-shaped connecting piece (170). U-shaped collar (7) may or may not be integral in rotation with the part (170) of U-shaped connection. The U-shaped connecting piece (170) is fixed to the stirrup (6) by the introduction and tightening of the second (172) leg of the workpiece (170) of U-shaped connection in the slots (161, 162) formed in the stirrup (6). The second (172) leg of the U-shaped connecting piece (170) has an increasing width towards the base of the U to allow it to be tightened in the slots of the stirrup (6). The second (172) leg of the U-shaped connecting piece (170) is introduced first in the larger slot (161) (L1) then pushed in and tightened until the second (L2). Advantageously, the end of the leg (172) of the U-shaped connecting piece (170) intended to be housed in the slots of the stirrup (6) is slightly bent in the direction of the distance from the collar (7) to avoid an untimely exit of the connecting piece (170) out of the stirrup (7). As described above, the U-shaped collar (7) is provided on its legs of two respective housings (173, 174) complementary to a key (175) for tightening a scaffolding tube arranged in the collar (7). The housings (173, 174) of the U-shaped collars (7) can be shaped to accommodate respective clamping keys which are hollow as in the embodiment of Figure 1. Similarly, the housings (173, 174) U-shaped collars (7) can be shaped to accommodate full clamping pins (175) as shown in the figure 7D. The housings (173, 174) of the U-shaped collars (7) may have different dimensions to allow effective clamping of the key (175).

FIG. 7B shows another embodiment of the means of connection of the modular element (1) with scaffolding elements, consisting a tube (99) of scaffolding provided along its length with legs (90) curved in U. The legs (90), curved like hooks, are located respectively near the two ends of the tube (99). The curved tabs (90) of the tube (99) are substantially identical to the part (170) fixing described above. In particular, the free end of each tab (90) is slightly curved in the direction of the distance from the tube (99) to avoid an untimely exit of the latter out of the caliper (6). The curved tabs (90) are intended to allow the tube (99) to be fixed to the panel (1) by the introduction and tightening of the legs (90) curved in the slots (161, 162) formed in the stirrups (6). Tightening the legs (90) curved tube (99) in the slots (161, 162) of the stirrup (6) and substantially identical to the tightening of the U-shaped connecting piece (170) in these same slots of the stirrup (6). The curved tabs (90) are for example welded or riveted on the tube (99) and are parallel to the axis of symmetry of the latter. So the tube (99) fixed by its legs (90) on two brackets (6) of the same panel (1) or on two stirrups (6) of two adjacent panels is perpendicular to the bars (5). Of course, it is possible to provide tubes (99) provided with curved tabs (90) at an angle to the axis of symmetry of the tubes (99) for example equal to 90 degrees. In this case, the tube (99) fixed on the panel (1) will be parallel to the bars (5). These first tubes (99) to hooks fixed horizontally on the panels (1) allow to start a scaffolding by fixing vertical tubes to these first (99) tubes standard by means of conventional connecting elements. So, on the stirrups (6) the operator can mount indifferently depending on the case, either systems with U-shaped collar (7) and connecting piece (170), ie tubes (99) with hooks (90).

FIG. 7E shows another embodiment of the means of connection of the modular element (1) with scaffolding elements, consisting two U-shaped collars (7A, 7B) secured at least in translation to the level of their base. That is to say that the two collars (7A, 7B) in U are back to back. The two back-to-back U-shaped collars (7A, 7B) can be substantially identical to the collar (7) described with reference to FIG. 7D. A first (7A) U-shaped collar is intended to be fixed on a stirrup (6) by means of a key (175) of clamping introduced simultaneously into the superimposed orifices of the first (7A) collar and the bracket (6) on which it is mounted. The second (7B) collar or upper collar is intended to accommodate a scaffolding tube (9) blocked by means of a clamping key (175) inserted into the orifices of the second (7B) collar.

The panel of Figures 7A and 7C differs from that of Figure 1 also by the fact that it has a chute (110) or laughs along each angle (10). The troughs (110) are provided in particular for the evacuation of liquids such as rainwater and to allow clipping on the angles (10, 11) of clips (201) in U, integral with an edge of a sheet (200) or protective fabric. For this purpose, the ends of the stirrups (6) and bars (5) located opposite a respective angle iron (10) are slightly spaced from the latter by a distance corresponding to the width of the chute (110). The width of the chute (110) may for example be equal to 5 mm approx. The cover (200) can be provided with clips (201) spaced regularly on one or more of its edges. The tarpaulin (200), stretched over the roof, can thus protect the latter against projections generated by works. The cover (200) can also be placed on panels (1) located at the edge of the roof, to protect a vertical wall. Two tarpaulins can also be mounted respectively along the two longitudinal edges a line of assembled panels. FIG. 7C represents a view in partial section of a panel (1) on an angle iron from which a tarpaulin is clipped (200) protection.

Finally, unlike the panel (1) of Figure 1, the panel of FIGS. 7A and 7C have two layers (2, 22) of polyurethane foam of different density.

Figures 9A and 9B show a third alternative embodiment of the invention. The panel of Figures 9A and 9B differs from that of Figures 7A and 7C only by the shape and arrangement of the stirrups (6) ensuring the connection of the modular element (1) with scaffolding elements. The elements identical to those described above are designated by the same digital references. In FIGS. 9A and 9B, the stirrups (6) are arranged each between the end of a bar (5) and a respective angle iron (10), the height of the stirrups (6) being substantially equal to the thickness of the bar (5). As before, the panel (1) has a chute (110) along each angle (10).

FIGS. 8A and 8B illustrate a method of lateral assembly of two modular elements according to the invention. The two panels intended to be Figures 8A and 8B assembled are identical to the panel of Figure 7A. The same elements as those described above are designated by the same reference numbers increased respectively for each panel (1A, 1B) with the letters A and B. Two panels (1A, 1B) are arranged side by side, angle iron (11A) against angle iron (10B). The bars (5A, 5B) of two panels (1A, 1B) are aligned. Likewise, the stirrups (6A, 6B) of the two adjacent panels (1A, 1B) are parallel and side by side. The system of scaffolding according to the invention comprises tubes (199) of scaffolding provided on their periphery and near each of their ends with a pair of legs (91A, 91B) curved in U. Legs (91A, 91B) curved in U are parallel to each other and intended to allow the lateral attachment of two adjacent panels (1A, 1B). The U-shaped legs (91A, 91B) are substantially identical to the legs (90) of the tube (99) of Figure 7B. Both tabs (91A, 91B) of each pair of tabs of the tube (199) are welded or riveted on the underside of a plate (92) itself made integral by its upper face of the tube (199). Thus, two adjacent panels (1A, 1B) can be joined laterally by the introduction and tightening of the two curved tabs (91A, 91B) of each pair of tube tabs (199) in the holes of the stirrups (6A, 6B) of respective pairs of stirrups of the two panels (1A, 1B) adjacent. Of course the panels (1) of the embodiment of the Figures 9A and 9B can also be assembled laterally and so substantially identical by the tubes (199) provided with pairs of lugs (91A, 91B).

In the nonlimiting exemplary embodiment of FIGS. 8A and 8B, the axis of longitudinal symmetry of the legs (91A, 91B) of the tube (199) is parallel to the axis of symmetry of the tube (199). That is to say that in the assembly position lateral of two panels (1A, 1B), the tube (199) is parallel to the angles (11A, 10B) of the panels. But it is possible to provide tubes (199) of which the longitudinal axes of symmetry of the legs (91A, 91B) are perpendicular to the axis of symmetry of the tube (199), so that in the lateral assembly position of two panels (1A, 1B), the tube (199) is perpendicular to the angles (11A, 10B).

Figures 8C and 8D show two alternative means lateral assembly of two modular elements (1A, 1B) according to the invention. The assembly element (270) of FIG. 8C consists of a part having substantially U-shaped with a first (273) leg forming a surface plane on which is made at least in translation a collar (7) in U. The U-shaped collar (7) integral with the assembly element (270) is substantially identical to that of FIG. 7D. The second leg of the element assembly (270) is formed by two legs (271, 272) slightly parallel spaced apart and substantially identical to the first (171) leg of the part (170) U-shaped connection of Figure 7D. Thus, the assembly part (270) allows the lateral joining of two adjacent panels (1A, 1B) by the introduction and tightening of the two tabs (271, 272) in the orifices of two stirrups (6A, 6B) belonging to two adjacent panels (1A, 1B).

The means of lateral assembly of two modular elements (1A, 1B) of Figure 8D consists of a double U-shaped collar (370) in length corresponding substantially to twice the length of the U-shaped collars (7) described above or simple U-shaped collars (in particular in FIGS. 7D, 8C). A necklace in a simple U (7) is made integral at least in translation with the base (371) of the double U-shaped collar (370). As described above, the U-shaped collar (7) simple is intended to accommodate a scaffolding tube fixed by means of a tightening key. The double U-shaped collar (370) is provided, substantially in its middle, of a transverse cut (372) in its two parallel legs. The transverse cutout (372) is intended to accommodate the two angles (11A, 10B, FIG. 8B) joined to two adjacent panels (1A, 1B). Symmetrically, on either side of the cutout (372), the legs of the double U-shaped collar (370) are provided with orifices or slots allowing the connection lateral of two adjacent panels (1A, 1B) by the introduction and tightening of two keys (175) in the respective superposed holes of the double collar (370) and two stirrups (6A, 6B) belonging to two panels (1A, 1B) adjacent side to side.

FIGS. 10A and 10B represent a fourth variant of embodiment of the invention using a support piece (300) consisting of a bar (301) secured by a first of its ends to the surface upper of a flat plate (302) parallel to the axis of symmetry longitudinal of the bar (301). The second end of the bar (301) is intended to be mounted on a bracket (6) of a panel, the bar (301) being at horse on the angle (10). The bar (301) has a U-shaped section and is integral of the plate (302) by the ends of the two legs of the U. As previously, the lower surface of the plate (302) is provided with one or two flexible and adherent coatings (2, 22). The second end of the bar (301) is provided with two rectangular slots perpendicular to the legs of the tube (301) and substantially identical to the slots of the stirrups (6) of FIG. 7A. Only a rectangular slot (361) is visible in Figures 10A and 10B. The two slots (361) of the bar (301) are intended to be superimposed on the slots (161, 162) of a stirrup (6) in order to be able fasten, using a clamping key, the bar (301) to the support of the panel (1). The bar (301) is also provided with a cutout (303) formed transversely in the two legs of its U-shaped section. cutout (303) is provided to allow mounting of the bar (301) on a angle iron (10), the angle iron being housed in the cutout (303) and the second end of the tube provided with the slots (361) is mounted on the bracket. So the bar (301) is arranged in the extension of a bar, the covering (2, 22) of the plate resting on the roof (302). Significantly above the cutout (303), the upper face of the bar (301) forming the base of the U-shaped section is provided with a cylinder (304) perpendicular to the bar (301) and intended to receive a tube (9, FIG. 10A) of threaded scaffolding and or fixed on the cylinder (304). The support piece (s) (300) mounted on a line of connected panels (1) make it possible to start scaffolding or to mount guardrails for workers on assembled panel lines and simultaneously guarantee the stability of the whole. Thanks to the invention it is for example possible to build railings (400, figure 11) longitudinal along a line of assembled panels or railings (401, FIG. 11) transverse, that is to say between two angles, perpendicular to these. Likewise, it is possible to constitute railings (402, Figure 11) between two or more lines of panels assembled.

Any modification within the reach of those skilled in the art also part of the spirit of the invention.

Claims (27)

Roof scaffolding system, made up of modular elements in the form of rigid panels (1) provided on one side with at least one flexible covering (2, 22) adhering to the surface of the roof and comprising, on the face of the panel (1) opposite to the face provided with the flexible covering (2, 22), holding means (5) facilitating the movement of workers, characterized in what it has on two of its opposite lateral edges at least one means (3, 4) of connection allowing a connection by pivoting with an element adjacent modular. Roof scaffolding system made up of modular elements form of rigid panels (1) provided on one side with at least one covering flexible (2, 22) and adhering to the roof surface and, on the panel opposite the face provided with flexible coverings (2, 22), holding means (5) facilitating the movement of workers, characterized in that it includes means (6, 7,8; 12, 13, 300) for rapid connection to a scaffolding or ridge of the roof. Roof scaffolding system according to claim 1 or 2, characterized in that the resistance of the flexible coating (s) (2, 22) and adherents and their respective thickness are determined so as to allow a deformation to absorb variations in shape of the roof on the one hand, and on the other hand, to obtain a distribution of pressures on the maximum roof area. Roof scaffolding system according to any one of Claims 1 to 3, characterized in that the flexible and adherent covering consists of a layer (2) of foam fixed to the panel (1), the foam having a density from 30 to 40 kg / m ³ to obtain sufficient crushing resistance. Roof scaffolding system according to any one of Claims 1 to 3, characterized in that the adherent flexible covering consists of a first layer (2) of foam fixed to the panel (1) and a second ( 22) layer of foam fixed on the first layer (2), the first layer (2) having a density of approximately 75 kg / m ³ and the second (22) a density of 30 to 40 kg / m ³ . Roof scaffolding system according to claim 4 or 5, characterized in that the thickness of the layer (s) (2, 22) of foam is at least 20 mm. Roof scaffolding system according to one of Claims 1 to 6, characterized in that the maintenance means for maintaining the workers are consisting of at least one transverse bar (5) integral with the surface of the sign. Roof scaffolding system according to claim 7, characterized in that the rigid panel (1) and the bars (5) are made of wood or in pressed or extruded metal material. Roof scaffolding system according to claim 7, characterized in that the rigid panel (1) and the bars are made of material molded plastic. Roof scaffolding system according to claim 1, characterized in that it comprises means (6-8; 12, 13) for connection to a scaffolding or roof ridge. Roof scaffolding system according to claim 2 or 10, characterized in that the means (6-8) for rapid connection with the scaffolding consist of at least one stirrup (6) integral with the panel (1) on which a U-shaped collar (7) is made integral at least in translation and a key (8) for clamping the tubes on the collar (7) intended to be introduced into holes (70, 71) provided in the collar (7). Roof scaffolding system according to claim 11, characterized in that the panels (1) are provided with an angle (10, 11) on each of their two longitudinal edges, the stirrup (s) (6) being fixed on the panel (1) and / or on transverse bars (5) integral with the surface of the panel and constituting the means for holding the workers, the stirrups (6) being located either astride the ends of the bars (5), or between the end of a respective bar (5) and the angle iron (10, 11) located opposite from the end of the bar (5). Roof scaffolding system according to claim 12, characterized in that the height of the stirrup (s) (6) straddling the bars is significantly greater than the thickness of the bars (5), and in that a U-shaped collar (7) is made integral at least in translation with a first leg of a U-shaped connecting piece (170), the U-shaped connecting piece (170) being fixed on the stirrup (6) by the introduction and tightening of a second leg of the U-shaped connecting part (170) in orifices (161, 162) formed in the part of the stirrup (6) raised relative to the bar. Roof scaffolding system according to claim 12 or 13, characterized in that it comprises scaffolding tubes (99) provided on their length of legs (90) curved allowing the fixing of the tubes (99) on the panel by the introduction and tightening of the curved legs (90) of the tube (99) in the holes (161, 162) of the respective stirrups (6). Roof scaffolding system according to any one of Claims 12 to 14, characterized in that it comprises tubes (199) scaffolding provided on its periphery with at least one pair of legs (91A, 91B) curved and parallel to each other, allowing the connection lateral of two adjacent panels (1A, 1B) by insertion and clamping of the two curved tabs (91A, 91B) of each pair of tabs of the tube (199) in the holes of respective pairs of stirrups (6A, 6B) consisting of two stirrups (6A, 6B) belonging to two adjacent panels (1A, 1B). Roof scaffolding system according to any one of claims 12 to 15 characterized in that it comprises elements assembly each consisting of an assembly part (270) rendered integral or less in translation with at least one U-shaped collar (7) for fixing a scaffolding tube, the assembly parts (270) each comprising two narrowly spaced parallel legs (271, 272) intended to ensure the lateral joining of two adjacent panels (1A, 1B) by the introduction and the tightening of the two tabs (271, 272) in the orifices of a pair of stirrups (6A, 6B) consisting of two stirrups (6A, 6B) belonging to two panels (1A, 1B) adjacent. Roof scaffolding system according to any one of claims 12 to 16 characterized in that it comprises elements assembly each consisting of an elongated assembly part (370) made integral at least in translation with at least one U-shaped collar (7), the part (370) of elongated assembly being provided, substantially in the middle, with a transverse cutout (372) to allow mounting on two angles (10B, 11A) adjoining two adjacent panels (1A, 1B), the part (370) assembly comprising orifices allowing the lateral attachment of the two adjacent panels (1A, 1B) by the introduction and clamping of two keys (175) in the respective superimposed orifices of the part elongated assembly (370) and two stirrups (6A, 6B) belonging to the two adjacent panels (1A, 1B). Roof scaffolding system according to any one of claims 12 to 17 characterized in that the panels (1) have a chute (110) along each angle (10, 11), the stirrups (6) or ends bars (5) located opposite a respective angle iron (10, 11) being slightly spaced from the latter by a distance corresponding to the width the chute (110), the chute allowing in particular the evacuation of water from rain and clipping on the angle iron (10, 11) of clips (201) U-shaped integral with a edge of at least one tarpaulin (200) or protective fabric. Roof scaffolding system according to claim 10, characterized in that the means (12, 13) of connection with the ridge are consisting of two modular elements (12, 13) hinged together and each comprising at least one connecting means (7) with a tube scaffolding (97, 98), said connecting means being made integral with the modular element, said tube (97) having an articulated end (99) with the tube (98) integral with the other connecting means of the second modular element. Roof scaffolding system according to any one of previous claims, characterized in that the connecting means (3, 4) allowing a pivoting connection between two modular elements adjacent are formed by at least one hook-shaped part (3) and located near a first lateral edge of the modular element and at at least one eyelet-shaped part (4) arranged near a second edge side of the modular element, the hooks (3) and eyelets (4) being located symmetrically with respect to the longitudinal edges of the panel for allow the introduction of the hooks (3) of a second modular element in the eyelet openings of a first modular element. Roof scaffolding system according to any one of Claims 12 to 19, characterized in that it comprises bars (300) supports mounted laterally on the panels (1), the bars (300) supports being mounted by a first of their ends having a U-shaped section on a stirrup (6) and being astride an angle (10) by means of a housing (303) formed in the thickness of the bar (300), the end of the bar (301) arranged on a stirrup (6) being provided with slots (161) coinciding with the slots (161, 162) of the stirrups (6) to allow the fastening of the bar (300) with the panel (1) by the introduction of a clamping key (175) in the aligned holes of the bar (301) and the stirrup (6), the second end of the support bar (300) being made integral with a plate (302) provided a flexible and adherent coating (2, 22) intended to be in contact with the roof, the support bar (300) being provided on its upper surface with at least a cylinder (304) constituting a means of rapid connection to a scaffold, each cylinder (304) being intended to receive a scaffolding tube (9) respective threaded and / or fixed on the cylinder (304), the bar (300) support allowing including the start of scaffolding and ensuring stability on the roof connected panels. Roof scaffolding system according to any one of previous claims, characterized in that scaffolding tubes (9) are fixed on the means (6, 7,8; 12, 13, 300) for quick connection to a scaffolding to build railings (400, 401) for workers, railings being arranged longitudinally (400) along an edge of at least a line of modular elements connected and / or transversely (401) by compared to modular elements. Roof scaffolding system according to any one of previous claims, characterized in that tubes (9) scaffolding are fixed on the means (6, 7,8; 12, 13, 300) of quick connection to scaffolding to build railings (402) for workers arranged transversely (402) between two lines of modular elements assemblies. Roof scaffolding system according to claim 9, characterized in that the panel (1) is made of polyurethane and the flexible deformable covering (2, 22) consists of foam polyurethane, the angles of the panel being molded in a block with this last, the angles interposed between the underside of the panel (1) and the polyurethane foam covering (2, 22), the lower ends of the angles (10, 11) being embedded in coating (2, 22) of foam polyurethane or being folded over the lower edges of the covering (2, 22). Method of mounting on a scaffolding system according to any one of Claims 1 to 24, characterized in that it consists: having a first modular element (1) bearing on the roof; then crochet a second modular element on the first modular element and bring the flexible covering (2, 22) adhering to the surface of the roof of the second modular element in contact with the roof by pivoting this second modular element around the connecting links the first modular element; to be fixed on the rigid face of the modular elements, connecting elements (6, 7) with scaffolding elements (9). Method according to claim 25, characterized in that it consists to secure the plurality of elements to the roof ridge by an articulated element whose the joint is blocked by blocking means. Method according to claim 26, characterized in that it consists to fasten by means (75) of rapid connection the plurality of elements to a bar of a facade scaffolding resting on another surface.

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