FR2948958A1 - System for installing scaffolding wall bracket to frontage of building, has support device with fixed supports fixed to frontage, where support device ensuring guided displacement of cradle to cantilever position of fixed supports - Google Patents

Abstract

The system has a cradle for receiving an operator for mounting a scaffolding wall bracket (23) to a frontage of a building. A support device has fixed supports fixed to the frontage. The support device ensures guided displacement of the cradle to a cantilever position of the fixed supports. The fixed supports have a rolling mural support that is directly fixed to the frontage. Joists (42, 43) are slid with the fixed supports, where the cradle is slidingly co-operated with the joists. An independent claim is also included for a method for installing a scaffolding wall bracket to a frontage of a building.

Description

The present invention relates to a system for installing a façade of a building with at least one scaffolding wall bracket and for a method of installing a facade of a building of at least one such console. Wall scaffolding extends away from the ground along a facade. It consists of a row of several consoles distributed along the front and supporting on the one hand safety posts and on the other hand a floor in several parts each supported by two consoles. Such a wall scaffolding is often used to perform roof renovation work and allows a roofer to be restrained when he falls down from the roof. A problem with this type of scaffolding is that it is difficult to install, especially when the building is high and access to the upper part of the facade near the roof is difficult, for example because the base of the facade is little or not accessible to a carrier vehicle nacelle or because access through the roof is difficult. The present invention is intended to overcome the disadvantages of the prior art, in particular to simplify the mounting of the consoles. To this end, the subject of the invention is a system for installing a facade of a building with at least one scaffolding wall console, comprising a nacelle on the one hand shaped to accommodate an operator performing the assembly of the wall console at the front and secondly carried by a support device which comprises at least one fixed support shaped to be fixed to the front and which allows the guided movement, horizontal and substantially parallel to the front, of the nacelle to a Cantilever position of the fixed support. In various embodiments of the system according to the invention, one may optionally also resort to one and / or the other of the following provisions. the fixed support comprises a rolling wall support shaped to be directly attached to the facade; the fixed bracket includes a console bearing bracket shaped to be directly attached to the wall bracket; the support device comprises at least one beam which is interposed between the fixed support and the nacelle to extend substantially parallel to the facade and which comprises a portion on the one hand cantilever relative to the fixed support and on the other hand supporting the basket at its free end; The beam slidably cooperates with the fixed support; the nacelle slidably cooperates with the beam; the support device comprises two parallel beams; - One of the beams is slidably mounted to the wall bearing bracket and the other of the beams is slidably mounted to the bearing support on console; Each beam is a tubular structure comprising a horizontal upper spar and a lower spar and spacers connecting said spars extending in a vertical plane; the rolling wall support and the console bearing support each comprise at least one roller on which the lower beam can roll; - The nacelle is shaped to be able to slide between the beams, having a structure provided on the one hand with longitudinal frames parallel to the beams and on the other hand rollers arranged laterally to the longitudinal frames to roll on the beams which, with the structure of the nacelle, constitute a guard body; - The bearing wall bracket has a safety part for attaching personal protective device operator working at the wall installation. A carabiner carried by a scaffolding In a particular embodiment according to the invention, the beam comprises an arranged at the end of its part in which slides the nacelle. In a particular embodiment according to the invention, the beam comprises the stop system fixed to false on

of the system a retractable abutment which is arranged at its end opposite its cantilever portion supporting the nacelle and which can occupy alternately: - an active position for stopping the sliding of the beam on the fixed support disposed at the end of a row of three fixed supports aligned at a distance from each other along the facade; and a retracted position allowing the sliding of said end of the beam through the fixed support disposed at the end of the row, to disengage from said fixed support while the beam 25 slidably cooperates with the other fixed supports of the row. Furthermore, another object of the invention is a method of installing, at the facade of a building, a wall scaffolding structure comprising a plurality of wall brackets to be installed at the facade, characterized in that it comprises a first step of installation of a system according to the invention, comprising at least one step of fixing to the front of at least one fixed support 35 belonging to a support device of said system; a first console installation step comprising fastening to the front of at least one of the consoles of the wall scaffolding structure; - After said first steps, a step of positioning the nacelle cantilever of the fixed support, with offset cantilever compared to a mounting location to the front of another consoles to fix; then a second console installation step comprising attaching to the facade of another consoles to be fixed to the facade at said location of attachment, by an operator using the nacelle. According to a feature that the method according to the invention may have, the step of positioning the nacelle at a cantilevered position of the fixed support is carried out by sliding a beam which belongs to a system according to the invention and which is slidably supported by the fixed support. According to another particularity that may be the method according to the invention, the step of positioning the nacelle to a cantilever position of the fixed support is effected by sliding the beam over a length corresponding at least to the spacing of two wall brackets of the scaffolding, the length of the beam corresponding to at least the length of the nacelle added to twice said spacing. According to another feature, after the second stage of console installation, for fixing to the front of each other console constituting a row of consoles aligned along the facade, the method according to the invention may comprise: a new step of positioning the nacelle to a cantilevered position of the fixed support, remote from the last installed console and offset cantilever compared to a mounting location to the front of the other consoles to fix; - A new step of attachment to the facade, by an operator using the nacelle, a new fixed support that slidably supports the beam of the system which is in accordance with the invention.

According to another particularity that may be the method according to the invention, the step of positioning the nacelle to a cantilevered position of the fixed support is performed on the one hand with the retracted position of a retractable stop and on the other hand with sliding of the end of the beam bearing said abutment through the fixed support disposed at the end of the row of wall brackets, with release of said fixed support while the beam slidably cooperates with the other fixed supports of the row .

According to another feature, the method according to the invention may comprise: after the first stage of console installation, on the one hand the attachment directly to the front of a rolling wall support, when fixing to the front of the fixed bracket in the first stage of installation of a system, and secondly the attachment directly to the installed console of a bearing support on console; then, - after the second step of console installation, on the one hand the attachment directly to the front of a wall-mounted bearing, near the last console installed, and secondly the fixing directly to the last console installed with a console bearing bracket.

According to another particularity that may be the method according to the invention, in the first step of installation of the system according to the invention, a wall beam is mounted guided sliding in each wall mounting bracket and a console beam is mounted guided sliding in each bracket bearing.

According to another feature that may be the method according to the invention, in the first step of installation of the system according to the invention, a nacelle is inserted between the beams, before the step of positioning the nacelle to a position in cantilever of the fixed support. Furthermore, the invention also relates to a nacelle installation system to a facade of a building of at least one scaffolding wall bracket, shaped to on the one hand accommodate an operator performing the assembly of the console mural on the front and on the other hand be carried by a support device which comprises at least one fixed support shaped to be fixed to the front and which allows the guided movement, horizontal and substantially parallel to the front, of the nacelle to a Cantilever position of the fixed support. The nacelle comprises a structure provided on the one hand with longitudinal frames and on the other hand with rollers arranged laterally to the longitudinal frames for rolling on a longitudinal beam which is interposed between the fixed support and the nacelle and which comprises a part of a part cantilevered relative to the fixed support and secondly supporting the nacelle at its free end. In various embodiments of the system according to the invention, one may optionally also resort to one and / or the other of the following provisions. a rectangular base tray serving as a structural base to the nacelle and, at the four corners of the tray, a rigid suspension upright whose lower end is fixed to the tray and whose upper end supports one of said rollers; each upright supports one of said rollers by means of a substantially U-shaped downwardly facing tread, oriented towards the outside of the nacelle, at least partially covering said beam and housing the roller which is adapted to roll on a rolling upper surface of a horizontal upper spar of a tubular structure of the longitudinal beam comprising, in addition to the upper spar, a horizontal lower spar and spacers connecting said spars extending in a vertical plane; a safety part for attaching a carabiner of personal protective device carried by an operator working on the installation of the wall scaffolding. Other objects, features and advantages of the invention will become apparent from the following description of one of its embodiments, given by way of non-limiting example, with reference to the accompanying drawings in which: FIG. a perspective view of the upper part of a conventional scaffold placed on the ground while being along a building facade supporting two mural scalding wall brackets; Figure 2 is a perspective view of the top of the building of Figure 1, showing the two wall consoles and a side mounting system wall brackets wall scalding; FIG. 3 is a perspective view of a detail of FIG. 2 showing support elements belonging to the lateral mounting system of scalding wall brackets for attachment to the wall and to a wall scalding wall console; FIG. 4 is a perspective view of a part of the lateral mounting system of wall brackets, showing a wall support and beams of this system; FIG. 5 is a perspective view of a detail of FIG. 2 showing, in working position on the beams, a nacelle of the lateral mounting system of mural scaffolding wall brackets; FIG. 6 is a partial perspective and exploded view of the nacelle of FIG. 5; - Figure 7 is another perspective view of the nacelle, in the working position on the beams; - Figures 8, 9, 12, 14 and 15 are views corresponding to Figure 2 for various steps of mounting the wall scaffold on its wall face in the side mounting system of wall brackets according to the invention; FIG. 10 is a perspective view of a detail of FIG. 9 showing a wall support of the system according to the invention; - Figure 11 is a perspective and partial exploded view of the wall bracket of the system according to the invention; - Figure 13 is a perspective view of a detail of Figure 12 showing the nacelle in working condition. In the different figures, the same references designate identical or similar elements. In the following description, the designated direction L is the longitudinal direction corresponding to a horizontal axis parallel to the facade to be equipped with the wall scaffolding, the direction designated T is transverse, the direction designated V is vertical. Referring to the figures, reference numeral 10 denotes a building having a frontage 12 at its upper part which must be provided, for example to carry out roof renovation work, with a wall scaffold 20 having wall brackets 23 which are integral. of the facade 12 (Figure 1) and which support floors 24 (Figure 8). Each wall bracket 23, of known type, is fixed to the wall by vertical plates 26 which are hinged a horizontal cross 23A supporting its floor 24 and a strut 23B. Each wall bracket 23 carries a post 28 (Figure 2) serving as a guard rail, with a net and smooth fixed to the posts, to secure the roof renovation work. Access to wall scaffolding 20 is by a vertical vertical scaffold 30 (Figure 1), vertical uprights 32 are placed on the ground. The vertical vertical scaffold 30 is equipped with a fixed lateral extension 34, cantilevered away from the ground. This fixed lateral extension 34 enables operators to fix two first wall brackets 23 serving as a base for the wall scaffold 20 (FIG. 1). According to the invention, a wall bracket lateral mounting system 40 (FIG. 2), or wall bracket side installation system 40, is used to install on the facade 12, in the extension of the first two wall brackets 23, other wall consoles 23 allowing the wall scaffold 20 to extend along the entire facade 12, without using along the entire facade scaffolding whose vertical uprights would be placed on the ground. The lateral mounting system 40 mainly comprises on the one hand beams 42, 43 which are in a horizontal axis and extend in a vertical plane, and secondly a nacelle 44 slidably mounted on the beams 42, 43. Each of the beams 42, 43 is slidably mounted with respect to the facade 12 on at least two fixed bearing supports which belong to the lateral mounting system 40 and which will be described later, each fixed bearing support being either integral with the frontage 12, is integral with one of the consoles 23 integral with the frontage 12. Each of the beams 42, 43 thus constitutes a sliding base for the nacelle 44.

Each of the beams 42, 43 is constituted by an upper tubular spar 46 and a lower tubular spar 48 which are interconnected by spacers 52 extending in a vertical plane being either perpendicular to said longitudinal members or inclined at V with respect to these latter. A retractable abutment 54 flat iron is arranged at the end of the beams 42, 43. The retractable stop 54 is mounted on the lower beam 48 by a pivot 54A. It comprises on the one hand a stop hook 54B shaped U and on the other hand a control rod 54C for controlling the retractable stop 54 between an active position and a retracted position. In the active position, the retractable stop 54 makes it possible to stop the end of the casing of its beam relative to at least one of the bearing supports. At this active position, the hook 54B is horizontal having a horizontal leg along the lower spar 48, a horizontal branch under the spar 48 and its vertical base which is turned outwardly of its beam. The opening of the U forming the hook 54B is on the beam side. The control rod 54C is locked for example by a pin of the type called jumper pin or pin beta passing through said rod 54C and the upper spar 46 corresponding. In the retracted position, the retractable stop 54 allows free sliding of its beam relative to at least one of the bearing supports. In this retracted position, the retractable stop 54 has its hook 54B and its rod 54C above the lower surface of the lower spar 48, this lower surface serving as a rolling surface for the sliding of the beam 42, 43 corresponding. An anti-fall stop 56, for a limit stop of the nacelle 44, is fixedly mounted on the beams 42, 43 at their end which is at the opposite of their end to which the retractable stop 54 is mounted. The retractable abutment 54 is for example a rod mounted on the upper spar 46 traversing it through and extending transversely on each side of the spar. The fixed bearing supports comprise those referenced 60 in the figures and whose name is bearing wall bracket because they are fixed directly to the front 12 (Figures 4 and 10). The bearing supports include those referenced 65 in the figures and whose name is bearing support console because they are attached to the horizontal cross 23A of their console 23 (Figures 3 and 13). In the following description, the truss 42 which is closest to the facade 12 is called wall truss because it is slidably mounted on rolling wall supports 60.

In the following description, the beam 43 which is farthest from the front 12 is called console beam because it is slidably mounted on the bearing supports 65. Each bearing wall bracket 60 and each bearing support on console 65 comprise rollers 62 on which rolls the running surface of the corresponding lower spar 48. The rolling wall supports 60 and the console bearing supports 65 each comprise, on the one hand, a lower yoke 68 with Y-shaped branches, the lower end of which bears the corresponding rollers 62, and, on the other hand, an upper yoke 70 with vertical branches and horizontal base, the bottom of the upper yoke 70 being integral with the top of the lower yoke 68.

With regard to each bearing wall support 60 serving for the wall beam 42, its upper bracket 70 is fixed by its base to a base tube 74 articulated along a horizontal axis to a base 76 anchored to the front 12 (FIG. and 11). A spacer rod 78 keeps the upper stirrup 70 away from the facade 12.

The wall bearing support 60 further comprises a vertical safety trunk 80 for attaching, by passing through a hole 80A, a carabiner attached to a lanyard attached to a safety harness carried by an operator working at the installation. 20. With regard to each bracket bearing 65 used for the console beam 43, its upper bracket 70 is fixed by its base to the horizontal crossbar 23A of its console 23. It should be noted that in each of the supports 60, 65, the height separating the rollers 62 and the horizontal base of the upper stirrup 70 corresponds substantially to the height of the beams 42, 43, a clearance at height being necessary to allow them to slide while rolling on the rollers 62. The pod 44 is intended to stand upright an operator so that he can install wall brackets 23 and rolling wall supports 60, having his feet set ns a tray 90 with a rectangular base serving as a base structure to the nacelle 44. This structure is provided at the four corners of the tray 90 of a rigid suspension amount 92 whose lower end is fixed to the tray 90. The structure comprises , at the upper end of each upright 92, a bearing yoke 94 substantially U-shaped, the U being open downwardly and facing outwardly of the nacelle 44. Each bearing yoke 94 houses a roller 96 provided for rolling on an upper running surface of the upper longitudinal members 46. Each bearing clevis 94 has a first of its branches which is integral with its amount 92 and a second branch oriented towards the outside of the nacelle 44. A flat longitudinal reinforcing bar 98 is fixed parallel to each of the longest edges of the tray 90, between the first branches and the corresponding amounts 92. The tray 90, the uprights 92 and the bars 98 form a longitudinal frame parallel to the beams. Two of the treads 94, namely those arranged in line with one of the shortest edges of the trough 90, have the second of their branches which is flared towards the outside of the nacelle 44. The two other treads 94 ie those arranged at the right of the other of the shorter edges of the tray 90, have their free ends provided with fastening lugs 99 allowing the removable fastener, for example by jumper pin or beta, a half loop 100 allowing the locking of the nacelle 44 on the beams 42, 43 by vertically surrounding them. An outer ring 102 is provided on each of the treads 94 at their outwardly directed limb to allow the attachment of a carabiner attached to a lanyard attached to a safety harness carried by an operator working at the facility. 20. The side mounting system 40 is assembled in the following manner, after preliminary assembly of the first two consoles 23 illustrated in Figure 1.

For this preliminary assembly, the first two consoles 23 are fixed to the front panel 12 in a conventional manner by an operator, for example, as illustrated in FIG. 1, by using the offset part 34 of the conventional scaffold 30, the vertical uprights 32 are placed on the ground. Firstly, in a first phase of implementation of the lateral mounting system 40, the first two rolling wall supports 60 are fixed to the facade 12 by an operator using the offset portion 34 of the conventional scaffold 30, screwing the bases 76 to the front panel 12 and pressing the spacer rods 78 on the front panel 12. As shown in FIGS. 2 and 3, the bases 76 of the supports 60 are anchored to the wall near the plates 26 of the horizontal crosspieces 23A of the consoles 23. In the first phase of implementation of the lateral mounting system 40, the console bearing supports 65 are fixed under the horizontal crosspieces 23A of the brackets 23, substantially mid-length of said cross members 23A so that the rollers 62 of the supports 60 and supports 65 are transversely offset by a distance corresponding to the distance separating the rollers 96 from the nacelle 44. In a second implementation phase of the system lateral mounting 40, the beams 42, 43 are mounted on their support 60, 65.

The wall beam 42 has its end provided with its anti-fall stop 56 which is successively inserted into each wall bearing support 60, by passing said stop 56 into the upper yoke 70 of said support 60 and slidingly pressing the spar. lower on the rollers 62 of said support 60. According to the same principle, the console beam 43 has its end provided with its anti-fall stop 56 which is inserted successively into each support bearing bracket 65, by passing said stopper 56 into the upper yoke 70 of said support 65 and slidingly pressing the lower spar 48 on the rollers 62 of said support 65. The beams 42, 43 can thus slide in abutment on their bearing supports 60, 65 until the retractable stops 54, in their active position, are in contact with the lower screeds 68 closest to the conventional scaffold 30. The beams 42, 43 then have as i FIG. 2 illustrates a sliding section between the supports 60, 65 and a cantilevered section in the vacuum, along the facade 12 where additional brackets 23 must be installed.

For this purpose, in a third phase of implementation of the lateral mounting system 40, the nacelle 44 is mounted on the beams 42, 43, passing the tray 90 between said beams, until the tray 90 descends in below the lower longitudinal members 48 and that its rollers 96 come into contact with the upper longitudinal members 46. The clevises 94 provided with outwardly flared branches of the nacelle 44 are arranged towards the free end of the beams 42, 43 and they favor contacting the rollers with the upper longitudinal members 46. The half-loops 100 are inserted from the bottom and then they are secured to their yoke 94, that is to say the yokes 94 arranged on the side of the brackets 23. The nacelle 44 is then vertically locked to the beams 42, 43. The lateral mounting system 40 is then in its state as shown in Figure 2, before a scaffolding floor 24 is placed on the horizontal rails 23A of the first two consoles 23, as shown in Figure 8. Advantageously, the nacelle placed near the free end of the beams 42, 43 can not fall into the void as anti fall stops 56 to stop its sliding. Similarly, the beams 42, 43 can not slide too far towards the vacuum because the retractable stops 54 can stop their sliding in this direction. The nacelle 44 and the beams 42, 43 are stopped in the opposite direction of sliding, by locking the nacelle 44 between the anti fall stops 56 and the corresponding console 23. In a fourth phase of implementation of the lateral mounting system 40, while the operator is in the nacelle 44 which is located near the free end of the beams 42, 43, a new bearing wall bracket 60 is installed , by attaching to the front 12 of its base 76 and fixing its lower yoke 68 with Y-shaped branches (Figures 9, 10 and 11). During this installation, the upper stirrup 70 and the lower clevis 68 are mutually attached while they surround their wall beam 42.

During this fourth phase of implementation of the lateral mounting system 40, a new bracket 23 is attached to the front 12, to which a bracket bearing support 65 is fixed (Figures 12 and 13), on the same principle of installation than that of the rolling wall support 60 described above. To finish this fourth phase, a new scaffolding floor 24 is placed (Figure 14). In a fifth phase of implementation of the lateral mounting system 40, it is first necessary to pass the retractable stops 54 to their retracted position to allow passage of the retractable stops 54 in the supports 60, 65 closest to the conventional scaffold 30. The actuation of the control rod 54C is effected from the wall scaffolding 20, by means of a catch allowing first its unlocking by removal of the corresponding pin and then its rotation actuation of its active position in its retracted position. Then, it is necessary to slide the beams 42, 43 under the wall scaffolding 20 already installed, on the one hand so that their retractable stops 54 exceed the supports 60, 65, and on the other hand so that the beams 42, 43 can be positioned sufficiently cantilever of the last console 23 installed (Figure 15), so that the nacelle 44 can be slid far enough for the installation of the next wall bracket. After this sliding of the beams 42, 43, the control rod 54C is pivotally actuated from its retracted position to its active position and locked, the nacelle can then again be slidable on the beams 42, 43, to theirs. free ends cantilevered.

To lengthen the wall scaffolding 20 along the facade 12, phases of implementation as described above in fourth and fifth phase succeed one another.

In a sixth phase of implementation of the lateral mounting system 40, at the last wall bracket installation 23, there is no support installation 60, 65, the final end of the wall scalding 20 being performed without problems while the nacelle 44 is on the beams 42, 43 deployed cantilever over a length corresponding to that illustrated in Figure 2. The length of beams cantilever between the nacelle 44 and the last supports 60, 65 corresponds substantially to the spacing of two consecutive consoles 23. In a seventh phase of implementation of the lateral mounting system 40, while the wall scaffolding 20 is completed to be put into use, the beams 42, 43 equipped with the nacelle 44 can be concealed under the floors 24 of the wall scaffolding, to be protected. For this purpose, the nacelle is slid under the last floor installed, which is possible given the lack of support 60, 65 at the last console 23.

The dismantling of the wall scaffold 20 and the lateral mounting system 40 is performed by operation taking place in reverse of the assembly described above. Advantageously, the invention allows to install a wall scaffold without access from the ground or the roof over the entire length of the facade. Advantageously, as the uprights 92 of the nacelle 44 are sufficiently high, the nacelle 44, with its longitudinal frames, and the beams 42, 43 serve as a safety guard during assembly and disassembly of the wall scaffold 20, knowing that the operator can attach to a vertical safety trunk 80 and an outer ring 102 arranged on each of the treads 94 of the nacelle 44. Advantageously, the securing security of the lateral mounting system 40 with respect to the facade is guaranteed by the independent fixing of the bearing supports 60, 65 of each of the beams, namely directly on the wall and via the wall brackets. The fixing of bearing supports 65 on the brackets 23 makes it possible to reduce the number of anchor holes drilled in the facade 12. Advantageously, the beams and the platform slide in the space determined by the row of brackets constituting the wall scaffolding. In variant not shown, the nacelle comprises an upper crossmember connecting its flat bars or the top of its raceways. In a variant that is not shown, the beams are interconnected by crosspieces arranged for example at the upper ends of the beams. In a variant that is not shown, the beams are interconnected by horizontal braces arranged for example above the retractable stops. In a variant not shown, the same beam frame acts as sliding girders with respect to the facade and nacelle

Claims (26)

REVENDICATIONS1. Installation system with a facade (12) of a building (10) of at least one scaffolding wall bracket (23), comprising a nacelle (44) on the one hand shaped to accommodate an operator performing the assembly of the wall console at the front and secondly carried by a support device which comprises at least one fixed support (60, 65) shaped to be fixed to the facade and which allows the guided movement, horizontal and substantially parallel to the facade from the nacelle (44) to a cantilevered position of the fixed support (60, 65). 2. System according to claim 1, wherein the fixed support comprises a bearing wall bracket (60) shaped to be directly attached to the front (12). 3. System according to any one of the preceding claims, wherein the fixed support comprises a console bearing support (65) shaped to be directly fixed to the wall bracket (23). System according to any one of the preceding claims, wherein the support device comprises at least one beam (42, 43) which is interposed between the fixed support (60, 65) and the nacelle (44) to extend substantially parallel to the facade (12) and which comprises a part on the one hand cantilevered relative to the fixed support and on the other hand supporting the nacelle at its free end. The system of claim 4, wherein the beam (42,43) slidably engages with the fixed support (60,65). 6. System according to any one of claims 4 to 5, wherein the nacelle (44) slidably cooperates with the beam (42, 43). 35 7. System according to any one of claims 4 to 6, wherein the support device comprises two beams (42, 43) parallel. 8. System according to claims 2, 3, 5 and 7 taken in combination, wherein one (42) of the beams is slidably mounted to the rolling wall support (60) and the other (43) of the beams is mounted sliding to the bearing support on console (65). 9. System according to any one of claims 7 to 8, wherein each beam (42, 43) is a tubular structure comprising an upper spar (46) and a lower spar (48) horizontal and spacers (52) connecting said longitudinal members extending in a vertical plane. The system of claims 8 and 9, wherein the rolling wall bracket (60) and the bracket bearing bracket (65) each include at least one roller (62) on which the lower beam (48) can roll. 11. System according to any one of claims 6 to 10, wherein the nacelle (44) is shaped to be able to slide between the beams (42, 43), having a structure provided on the one hand with longitudinal frames (92, 98) parallel to the beams (42, 43) and secondly rollers (96) arranged laterally to the longitudinal frames to roll on the beams that together with the structure of the nacelle, constitute a guard rail. 12. System according to any one of claims 6 to 11, wherein the beam (42, 43) comprises a fixed stop (56) arranged at the end of its cantilever portion on which slides the basket (44). . 13. System according to any one of claims 5 to 12, wherein the beam (42, 43) comprises a retractable stop (54) which is arranged at its end opposite its cantilever portion supporting the nacelle (44). and which can alternatively occupy: an active position for stopping the sliding of the beam (42, 43) on the fixed support (60, 65) arranged at the end of a row of three fixed supports aligned at a distance from one another along the facade (12); and a retracted position allowing said end of the beam (42, 43) to slide through the fixed support (60, 65) disposed at the end of the row, to disengage from said fixed support (60, 65) while the beam (42, 43) cooperates slidably with the other fixed supports (60, 65) of the row. The system of any one of claims 2 to 13, wherein the rolling wall bracket (60) includes a security portion (80) for attaching a personal protection karabiner carried by an operator working to the installation of the wall scaffolding. 15. A method of installing at the facade (12) of a building (10) a wall scaffold structure (20) having a plurality of wall brackets (23) to be installed at the facade, characterized in that it comprises: a first step of installation of a system (40) according to any one of claims 1 to 14, comprising at least one step of attaching to the front of at least one fixed support (60, 65); ) belonging to a support device of said system; a first console installation step comprising fastening to the front of at least one of the brackets (23) of the wall scaffolding structure (20); - After said first steps, a step of positioning the nacelle (44) cantilevered of the fixed support (60, 65), with offset overhang relative to a mounting location to the front of another console (23) to be fixed; then - a second step of console installation comprising the attachment to the facade of another visonsoles (23) to be fixed to the front (12) at said location of attachment, by an operator using the nacelle (44). 16. Method according to the preceding claim, characterized in that the step of positioning the nacelle (44) to a cantilevered position of the fixed support (60, 65) is effected by sliding a beam (42, 43). ) which belongs to a system (40) according to any one of claims 6 to 14 and which is slidably supported by the fixed support (60, 65). 17. Method according to the preceding claim, characterized in that the step of positioning the nacelle (44) to a cantilever position of the fixed support (60, 65) is effected by sliding the beam (42, 43). over a length corresponding at least to the spacing of two wall brackets (23) of the wall scaffold (20), the length of the beam (42, 43) corresponding to at least the length of the nacelle (44) added twice that spacing. 18. Method according to the preceding claim, characterized in that, after the second console installation step (23), for attachment to the facade (12) of each other console constituting a row of consoles aligned along the facade , it comprises: - a new step of positioning the nacelle (44) to a cantilevered position of the fixed support (60, 65), at a distance from the last bracket (23) installed and offset by cantilever by report a mounting location to the front of the other consoles (23) to fix; - a new step of attachment to the facade, by an operator using the nacelle, a new fixed support (60, 65) which slidably supports the beam (42, 43) of the system (40) which is in accordance with the any of claims 6 to 14. 19. Method according to the preceding claim, characterized in that, the system (40) according to claim 13, the step of positioning the nacelle (44) to a cantilevered position of the fixed support (60, 65). ) is performed on the one hand with the retracted position of a retractable stop (54) and on the other hand with sliding of the end of the beam (42, 43) bearing said stop (54) through the fixed support (60, 65) disposed at the end of the row of wall brackets (23), with release of said fixed support (60, 65) while the beam (42, 43) slidably cooperates with the other fixed supports (60, 65) from the row. 20. Method according to any one of claims 15 to 19, characterized in that it comprises: - after the first console installation step, on the one hand the attachment directly to the front (12) of a support rolling wall (60), when attaching to the front of the fixed support in the first step of installation of a system, and secondly the attachment directly to the installed bracket (23) of a bearing support on console (65); then, after the second stage of console installation, on the one hand the attachment directly to the front (12) of a rolling wall support (60), near the last installed console (23), and on the other hand attaching directly to the last installed console (23) a bracket bearing bracket (65). 21. Method according to the preceding claim, characterized in that, in the first step of installing the system (40), the latter being in accordance with any one of claims 7 to 14, a wall beam (42) is mounted to guided sliding in each bearing wall bracket (60) and a bracket beam (43) is slidably guided in each bracket bearing bracket (65). 22. Method according to the preceding claim, characterized in that, in the first step of installation of the system (40), the latter being in accordance with any one of claims 6 to 14, a nacelle (44) is inserted between the beams (42, 43) prior to the step of positioning the nacelle (44) at a cantilevered position of the fixed support (60, 65). 23. Nacelle of installation system with a facade of a building of at least one scaffolding wall console (23), shaped to accept an operator performing the assembly of the wall console at the facade and on the other hand be carried by a support device which comprises at least one fixed support (60, 65) shaped to be fixed to the facade (12) and which allows the guided displacement, horizontal and substantially parallel to the facade, of the nacelle (44) at a cantilevered position of the fixed support (60, 65), comprising a structure provided on the one hand with longitudinal frames (92, 98) and on the other hand with rollers (96) arranged laterally to the longitudinal frames (92, 98) for rolling on a longitudinal beam (42, 43) which is interposed between the fixed support (60, 65) and the nacelle (44) and which comprises a portion on the one hand cantilevered with respect to the fixed support and secondly supporting the platform at its free end. 24. Nacelle according to the preceding claim, characterized in that it comprises a tray (90) with a rectangular base serving as a structural base to the nacelle (44) and, at the four corners of the tray (90), a rigid amount of suspension (92) whose lower end is fixed to the tray (90) and whose upper end supports one of said rollers (96). 25. Nacelle according to the preceding claim, characterized in that each upright (92) supports one of said rollers (96) via a tread (94) substantially U-shaped open downwards, oriented to the outside of the nacelle (44), at least partially covering said beam and housing the roller (96) which is adapted to roll on a running upper surface of a horizontal upper spar (46) of a tubular structure of the longitudinal beam (42, 43) comprising, in addition to the upper spar (46), a horizontal lower spar (48) spacers (52) connecting said spars extending in a vertical plane. 26. Platform according to one of claims 23 to 25, characterized comprises a portion of attaching a carabiner individual carried by a wall scaffolding installation. and safely (102) any operator device in that it allows for protection y 15 working