EP3192941A1 - Scaffold comprising a lowerable railing - Google Patents

Abstract

A scaffolding system (1) comprising a support of a tray assembly (30) and a railing assembly (20), comprising two scale assemblies (10, 11) facing one another, and the guardrail assembly (20), said assembly comprising at least one guardrail post (270, 271, 272, 273) and at least one rod-like element (272, 273) rigidly secured to a post corresponding railing (270, 271), and forming with said railing post a railing frame, wherein the guardrail assembly moves from a lowered position to a raised position, and vice versa, by a rotation of the guardrail frame about an axis ((D1), (D2)) having a parallel to both in a plane defined by said railing frame and in a plane defined by the plateau set.

Description

The invention relates to a scaffolding system comprising two ladder assemblies facing each other, a set of platforms resting on these sets of ladders and a set of guardrails. The system is arranged so that the railing can move from a lowered position to a raised position, the guardrail in the raised position providing a protective function to the possible persons on the set of tray.

The Applicant sells under the names SK4 and SK6 scaffolding adjustable in height, thus sliding ladder parts relative to others. The ladder portions intended to remain on the floor have a greater width than the ladder portions intended to slide upwards. The tray and guardrail also slide relative to the uprights, and are therefore installed by moving them up the scaffolding.

There is a need for a system to reconcile compactness in lowered position, robustness and security.

There is provided a scaffolding system comprising a support of a set of plates and a set of railings, this support comprising two scale assemblies facing each other, each scale assembly comprising at least two uprights and at least two rungs each extending between two uprights to allow access to the deck assembly by climbing on the rungs. A railing assembly includes at least one railing post mounted on a corresponding ladder assembly (eg mounted at one end on one end of a support post, said scale post, corresponding), and at least one rod-type element rigidly secured to a corresponding railing post, and forming with said railing post a railing frame.

When the scaffolding assembly is in the raised position, the railing frame can define a plane that coincides with or is close to the plane defined by the scale assembly on which is mounted (directly or via one or more intermediate pieces) the amount of railing. In other words, the railing frame can be in the continuity of one of the scale sets.

The scaffolding system is arranged so that the guardrail assembly can move from a lowered position to a raised position, and vice versa, the guardrail assembly in the raised position providing a protective function for any persons. found on the set of board.

The system is arranged so that the railing assembly moves from the raised position to the lowered position, and vice versa, by rotating the railing frame post around an axis having a parallel at a time in a plane defined by said railing frame and in a plane defined by the plateau set (said horizontal plane).

The rotation can be carried out so that during rotation the guardrail frame is outside the scaffolding system.

When the railing is in the lowered position, the amount of the guardrail frame is folded against the corresponding scaffold amount.

Thus, the transition from the lowered position to the raised position requires less support, and in particular the amounts of scale, than in the prior art, thus achieving higher scaffold heights for a given space.

In addition, the railing assembly can be relatively rigid and remain relatively straight in the raised position.

The frame being folded outside, it avoids the design constraints related to taking into account the footprint inside the scaffolding.

In addition, when the guardrail frame is folded down against the corresponding ladder assembly, access to the tray assembly becomes more difficult because of the presence of this frame against the scale assembly, thereby securing the scaffolding system in that a technician wishing to climb the ladder assembly to access the tray will intuitively raise the frame of railing to clear the scale assembly he wishes to use.

Also, the scaffolding system can be relatively compact in the lowered position.

The scaffolding system can thus be relatively robust, compact and secure.

The amount of railing extends, when the guardrail assembly is in the raised position, in a direction having a component parallel to the longitudinal direction of the corresponding scale amount, or normal to the plane defined by the set plateau.

The invention is not limited to a particular mounting of the guardrail amount on the corresponding scale assembly.

For example, it is possible to provide an assembly of one end of this railing post at one end of a ladder post.

The ladder uprights assembled to the railing posts may be ladder set uprights, or not, for example vertical uprights of a shelf assembly or an intermediate structure between the ladder assemblies and the ladder assembly. bodyguard.

Advantageously and in a nonlimiting manner, for at least one amount of railing, the corresponding rod-type element and forming with said amount the railing frame may comprise another amount of railing and one or more elements ( s) spacer extending between said railing posts. The frame can thus have a parallelogram type structure.

The rod-like element may for example comprise another railing post, for example an amount supported in the raised position by the end of the other ladder amount of the ladder assembly corresponding to the amount of guard -body.

Advantageously and non-limitatively, the railing assembly may comprise a rail secured by at least one end to at least one post of the railing frame.

The rotation may for example take place around an axis having a component parallel to the longitudinal direction of a step of the scale assembly.

Advantageously, when the guardrail assembly is in the raised position, the rail can be raised with respect to the plane of the guardrail frame, and in particular extend in a direction normal to this plane.

Advantageously, the rail can be pivotally mounted on the railing post, about an axis parallel to the longitudinal direction of this amount, so as to be folded against the railing frame. Thus, prior to the rotation of the railing frame, it is possible to fold the rail in a plane parallel to the plane of the railing frame, thus reducing the size.

The invention is in no way limited to sleevers pivotally mounted: one could for example provide a rail rigidly fixed to a post, and forming with this amount a railing frame for pivoting about an axis parallel to the direction longitudinal of the smooth.

Advantageously and in a nonlimiting manner, the beam may be arranged so as to be able to pass from a first state, corresponding to a first length of beam, to a second state, corresponding to a second length of beam strictly greater than the first length of smooth, for example by telescoping, or other.

Advantageously, the rail may comprise a hinge, and on either side of this hinge, two portions of the hinge, the hinge allowing one of these hinge portions to be pivoted and folded against the other portion of the hinge. smooth.

Advantageously and in a nonlimiting manner, the guardrail assembly can be non-releasably assembled on at least one scale assembly, that is to say that under normal conditions of use, the railing assembly remains on the scale assembly. This does not exclude that it may be possible to detach the guardrail assembly, including for repair purposes, for example using specific tools.

Advantageously, the scaffolding system may comprise an assembly element with a part mounted on the railing post, and a part mounted on the support, for example on a ladder post.

Advantageously, these parts are movable relative to each other and define a pivot connection for the rotation of the railing frame.

Advantageously, a lock can make it possible to block any relative movement of these parts between them. Thus, the user undoes this lock before raising or lowering the guardrail.

Advantageously, each scale assembly may include a plurality of ladder portions sliding relative to each other in a longitudinal direction to move from a retracted state to an expanded state. The ladder assembly can thus be relatively compact, when the ladder assemblies are retracted and the guardrail assembly lowered.

• un côté à partir duquel s'étendent les échelons, dit flanc, et,
• de part et d'autre du flanc, deux autres côtés, dits champs.

For example, the amounts can each define, in a plane normal to the longitudinal direction, a profile with:

• a side from which extend the ladder, said flank, and,
• on either side of the flank, two other sides, called fields.

At least one amount of at least one ladder portion may define on one of its fields a male slide member, and at least one amount of at least one other ladder portion of the same ladder assembly may be profiled in the longitudinal direction so as to define on one of its fields, opposite the field defining the male slide element, a female slide element. The scaffolding system may be arranged so that the male slide member cooperates with the female slide member so that the ladder portions corresponding to these slide members can slide relative to each other in the longitudinal direction of the amounts.

The invention is in no way limited to multi-part scale assemblies capable of sliding relative to each other. For example, each scale set may form a rigid whole.

Advantageously, for each scale assembly, locking means may be arranged to prevent a return of this scale assembly in the retracted state from a plurality of locking positions defining a locking step.

Advantageously, at least one amount of guardrail can be assembled to a corresponding scale amount by a partial connection so that when only one of the ladder assemblies is being deployed, the amount of guardrail is trained. in movement relative to the amount of scale, said movement continuing at least until the difference in height between the scale sets reaches the locking pitch, to compensate for this difference in height.

Advantageously and without limitation, the system may further comprise a folding base pre-mounted between these sets of scale. The scaffolding system can thus move from a closed state, in which the two sets of ladders are brought closer to one another, to an open state, in which the two sets of ladders are kept apart. one from the other by the folding base.

The scaffolding system can thus be particularly compact.

Advantageously and in a nonlimiting manner, the scaffolding can be arranged so that whatever the state of the scaffolding system, the folding base remains fixed to the ladder sets and remains in the plane occupied by the folding base at the open state.

Advantageously and without limitation, the scaffolding system may comprise a locking device arranged to trigger a blocking of the basic elements when the open state is reached.

The scaffolding system may advantageously comprise a first slide element secured to an element of the folding base, and a second slide member, cooperating with the first slide member, and arranged so that when the scaffolding system changes from the folded state to the open state, the first slide member moves from a first position relative to the second slide element, to a second position. The locking device can be arranged to trigger a blockage of the first slide element when said element reaches the second position.

There is further provided a method of mounting a scaffolding system having two ladder assemblies facing each other, for supporting a tray assembly, each ladder assembly comprising at least two studs and at least two rungs each extending between two posts to allow access to the set of boards by climbing on the rungs, a set of railings, comprising at least one railing post and at least one railing element. Rod type rigidly secured to a corresponding railing amount, and forming with said railing amount a railing frame. The method comprises a step of moving the guardrail assembly from a lowered position to a raised position, and vice versa, by pivoting the guardrail frame about an axis having a parallel in the plane defined by the set of plates and in the plane defined by the railing frame, so that in the course of rotation the railing frame is outside the scaffolding system, and that in the lowered position, the amount of the railing frame is folded against a support amount, said amount of scale, corresponding.

When the scaffold assembly is in the raised position, the railing frame defines a plane coinciding or close to the plane defined by the scale assembly on which is mounted the amount.

• La figure 1 montre un exemple d'échafaudage selon un premier mode de réalisation de l'invention.
• La figure 2 montre une partie de l'échafaudage représenté sur la figure 1, à l'état fermé.
• La figure 3 montre une partie de l'échafaudage représenté sur la figure 1, à l'état ouvert.
• La figure 4 montre une partie d'un exemple d'échafaudage selon un deuxième mode de réalisation de l'invention, à l'état fermé.
• La figure 5 montre la partie de l'échafaudage représentée sur la figure 4, à l'état ouvert.
• La figure 6 est une vue en perspective d'un détail de l'échafaudage illustré par les figures 2 et 3
• La figure 7 montre un exemple d'échafaudage proche de celui de la figure 1, en cours de montage.
• La figure 8 est une vue de profil de trois montants de trois portions d'échelle respectives de l'échafaudage de la figure 1.
• La figure 9 montre un exemple d'élément d'assemblage entre un garde-corps et une partie d'échelle de l'échafaudage de la figure 1.
• La figure 10 montre une partie de l'exemple d'échafaudage de la figure 1, en cours de montage.
• La figure 11 montre l'échafaudage de la figure 7, à l'état compact et de face,
• La figure 12 montre l'échafaudage de la figure 7 à l'état compact, vu de profil.
• La figure 13 est une vue en perspective d'une partie haute du système d'échafaudage de la figure 1.
• La figure 14 est une vue en perspective d'un exemple de base pliante pour un système d'échafaudage selon un mode de réalisation proche de celui des figures 4 et 5.
• La figure 15 montre l'élément d'assemblage de la figure 9, lorsqu'installée entre deux montants.

The invention will be better described with reference to the figures, which relate to embodiments given by way of example and not limiting.

• The figure 1 shows an example of scaffolding according to a first embodiment of the invention.
• The figure 2 shows some of the scaffolding shown on the figure 1 , in the closed state.
• The figure 3 shows some of the scaffolding shown on the figure 1 , in the open state.
• The figure 4 shows a part of an example of scaffolding according to a second embodiment of the invention, in the closed state.
• The figure 5 shows the part of the scaffolding shown on the figure 4 , in the open state.
• The figure 6 is a perspective view of a detail of the scaffolding shown by the Figures 2 and 3
• The figure 7 shows an example of scaffolding close to that of the figure 1 , being edited.
• The figure 8 is a profile view of three uprights of three respective scale portions of the scaffolding of the figure 1 .
• The figure 9 shows an example of an assembly element between a railing and a ladder part of the scaffold of the figure 1 .
• The figure 10 shows part of the scaffolding example of the figure 1 , being edited.
• The figure 11 shows the scaffolding of the figure 7 , in the compact and frontal state,
• The figure 12 shows the scaffolding of the figure 7 in the compact state, seen in profile.
• The figure 13 is a perspective view of an upper part of the scaffolding system of the figure 1 .
• The figure 14 is a perspective view of an example of a folding base for a scaffolding system according to an embodiment close to that of Figures 4 and 5 .
• The figure 15 shows the assembly element of the figure 9 , when installed between two uprights.

Identical references may be used from one figure to another to designate identical or similar elements, in their form or in their function.

With reference to the figure 1 , which relates to a first embodiment, a scaffolding system 1 comprises a tray assembly support, comprising two sets of scales 10, 11, facing one another, and kept at a distance each other thanks to an articulated spar 160 and to a folding base 60.

In this first embodiment, the folding base 60 defines a pantograph, and comprises bar-type elements, here rods 41, 41 ', 141, 141', articulated, secured to the uprights 120, 130 of the ladder assemblies. 10, 11 by hinge members 42, 43.

The scaffolding device further comprises stabilizing elements 40 and remote wheels 50.

Each scale assembly 10, 11 comprises a plurality of scale portions 100, 101, 102, and 110, 111, 112, here three scale portions. Each ladder portion 100, 101, 102, 110, 111, 112 comprises two uprights 120, 121, 122, 130, 131, 132 and rungs 3 forming a spacer between the uprights.

These steps are used for access to the board, the user using one of the ladder sets in the manner of a ladder, by putting feet on the ladder.

On the other hand, the scale assemblies can support the entire plateau directly, i.e., the plateau assembly is in contact with the scale sets, or indirectly. In the latter case, there may be intermediate pieces between the tray assembly and the ladder assemblies, for example a lower part of the guardrail assembly.

In the same way, ladder assemblies can support the guardrail assembly directly or indirectly.

The steps 3 can be attached to the uprights 120, 121, 122, 130, 131, 132 by welding. In an embodiment not shown, it may provide a fastening by riveting, or other.

The ladder portions 100, 101, 102, and 110, 111, 112 of the same scale assembly 10, 11 are slidable relative to one another in pairs.

Locking means, here hooks 150 pivotally mounted on the ladder portions intended to be raised, and able to engage with two rungs of two adjacent ladder portions (one rung of the ladder portion on which is mounted hook and a rung of the adjacent ladder portion of the inner side of the scaffold) prevent extended ladder portions from falling back under the effect of gravity. These hooks can thus ensure locking for several scaffold heights, the pitch between these heights being the inter-rung distance.

In an embodiment not shown, it could further provide a pin system and holes in the amounts, to block any movement between two adjacent ladder portions.

The scaffolding system 1 further comprises a tray assembly 30 with a hatch, not shown on the figure 1 , defined in the floor of the board.

The ladder system 1 further comprises a guardrail assembly 21 comprising guard rails 270, rails 21, 22, underlays 24, 25 and reinforcement bars 23.

The Figures 11 and 12 show a scaffolding close to the scaffolding system shown on the figure 1 in the compact state. These scaffolding systems are one-piece, with the exception of the tray assembly 30 which is detachable, i.e., with the exception of the tray assembly 30, each of the elements of these Scaffolding systems is secured by a link that can not be easily defeated to the rest of the scaffolding system. In other words, the scaffolding of the figure 1 is devoid elements likely to be lost, with the exception of the set of trays 30 which is detachable.

The one-piece scaffolding 1 Figures 11 and 12 is in the folded state, in the form of a cube in the form of a pad of dimension 0.98 x 0.92 x 1.38 meter for example and provided with four swivel wheels and adjustable in height 50.

To mount this scaffolding, we start from the closed and folded state corresponding to the representation of Figures 11 and 12 by moving away from one another the scale assemblies 10, 11 in the direction of the length (direction z on the mark of the figure 1 ), thus moving from the closed state to the open state.

The Figures 2 and 3 on which the scaffolding system is only partially represented, allow to better visualize this first step of the assembly.

When the scale assemblies 10, 11 are so far from each other along the length direction, the folding bases 60 unfold in this direction z.

The scalding system is arranged so that the rods 41, 41 ', 141, 141' of the folding base 60 are pivotable relative to the ladder portions 110, 130 to which they are attached.

The rods 41, 41 'are pivotally mounted at a first height, near the highest rung of each ladder portion 100, 110.

The scaffolding 1 comprises the fixed hinge elements 42, secured to the uprights 120, 130 and simply allowing a pivoting around the x direction. In other words, these hinge members 42 retain their position during the step of moving the ladder portions 120, 130 away from each other.

The rods 141, 141 'are pivotally mounted on the uprights 120, 130, respectively, by means of movable hinge elements 43, the detail of one of which is illustrated by the figure 6 .

These movable hinge elements 43 are arranged to support a pivoting movement of the adjoining rod 141 around the x direction, and also to support a translational movement in the y direction relative to the corresponding upright 120, 130.

With reference to the figure 6 , the amount 130 thus defines, in one side of its profile, a female slide element, here a flanged groove 62. This flanged groove receives a male slide element, here a T element 142, in one piece with the movable hinge member 43.

The movable hinge element 43 can be obtained by producing a profile defining the T-element 142 and two surfaces 242 facing each other, then by installing between these surfaces 242 a rod otherwise received in a bore of the articulated rod 141, to allow rotation about the x-axis of this rod 141.

To return to the figure 3 , the folding base 60 is thus fixed to two uprights 120, 130, by means, for each upright 120, 130, of a fixed hinge element 42 and of a movable hinge element 43.

In this example, the fixed hinge member 42 is secured for example by welding to the corresponding amount 120, 130 substantially at the level of the highest step 3 of the corresponding scale portion, 100, 110, while the movable hinge member 43 is translatable upward in the y direction when the ladder portions 100, 110 are spaced from each other.

With reference to the figure 6 , it can further provide a locking device 300 is set up automatically at the end of movement.

The locking device may for example comprise a pin 301 mounted on a spring not shown, and a plate 302 defining an orifice (not visible on the figure 6 ) the plate 302 is fixed on the slide member 43. When this element 43 reaches an end position, the non-visible hole is opposite the pin 301. Due to the forces exerted by the spring, the pin 301 comes embed in this hole, thus ensuring the blocking of the element 43, and therefore of the rod 141.

The plate comprises a projecting portion 303, abutting against an edge of the element 43, in order to prevent the plate 302 from being pivoted with respect to this element 43.

To unlock the element 43, an operator can pass a finger in the ring 304 and cause the pin 301 out of the hole. The operator will have to drive the rod 141 while moving the pin 301 out of the hole to prevent re-locking in the open position.

Such a system involving a sliding connection and an automatic locking at the end of the race may be more reliable than the prior art in which human intervention was necessary, the operator coming to fix rods by means of pins. In addition, the time saving during assembly can be appreciable. On the other hand, a manual unlocking is provided for security reasons.

When the articulated spar 160 is deployed horizontally, a locking can be implemented at its articulation to prevent folding and thus provide a spacer function between the ladder portions 100, 110.

In a second step, when the scale assemblies 10, 11 are thus separated from one another by a distance corresponding to the length of the plate assembly 30, a platform of the set of plateau 30 on the highest rungs 3 of the ladder portions 102, 112.

More specifically, the tray assembly 30 comprises two parts and a hinge for folding these two parts against each other by a rotational movement about the x axis when the tray assembly is oriented in what will be its position of use. The tray assembly can thus be stowed when in the folded state, in the tile-like structure, as illustrated in FIG. figure 12 .

The platform can be placed by means of hooks 71 on the highest steps 3 of the ladder portions 102, 112.

Once the tray is installed, the guardrail assembly 20 can be raised.

In the folded state, this assembly 20 comprises two sub-assemblies 220, 221, each corresponding to a respective scale assembly 11, 10 (see FIGS. Figures 10, 11 and 13 ). The subassembly 220 comprises two amounts 270, 273 in the continuity of the two amounts 122, 122 'of the ladder portion 112, and the amounts 271, 272 of the subassembly 221 are in the continuity of the amounts 132, 132' of the part of scale 102.

Each subassembly 220, 221 comprises a rail 21, 22, a corresponding sub-smooth 25, 24, as well as reinforcement bars 23 forming a spacer between these smooth and those under smooth.

More specifically, as illustrated in figures 7 , 10 and 13 , the rail 22 and the sub-smooth 24 each define a hinge 26 for folding a railing portion 201 of the subassembly 221 comprising the rail 22 and this smooth under 24 on itself.

In the same way, a guard part 202 comprising the rail 21, the sub-rail 25 and the corresponding reinforcement bars 23 can be folded back on itself by means of similar articulation 26.

The upright 271 forms with rod-like elements 272, 274, 275, here another upright 272 and spacer elements 274, 275, a railing frame in the continuity of the plane of the ladder assembly 10 .

The upright 273 forms with rod-like elements 270, 276, 277, here another upright 270 and spacer elements 276, 277, another railing frame, this time in the continuity of the overall plane. of scale 11.

In the compact state, these railing portions 201, 202 are folded back on themselves. Each railing portion 201, 202 is secured by a non-removable link 223, 224 to a corresponding upright 271, 273, this non-removable link 223, 224 defining a hinge about a direction close to and parallel to the longitudinal direction of this amount 271, 273, so that in the compact state, the railing portion 201, 202 folded on itself thanks to the hinge elements 26 can be folded against the corresponding railing frame.

In addition, each railing subassembly 221, 220 is attached to the corresponding ladder assembly 10, 11 by an x-joint at the member 28, allowing the rigid railing frames and sleeved sets folded over these railing frames to pivot about axes (D1), (D2), respectively, through the outside of the scaffolding system 1.

These axes (D1), (D2) are each parallel to a line lying both in a plane defined by the plateau (horizontal plane, or normal plane to the longitudinal direction of the uprights if they are vertical) and in a plane defined by the corresponding railing frame.

Thus, in the compact state, the guardrail subassemblies 220, 221 are folded against the different ladder portions 120, 121, 122 and 100, 101, 102, thus making it possible to obtain a relatively large scaffolding system. compact as illustrated on the Figures 11 and 12 .

Once the scale assemblies 10, 11 are moved away from each other (open state) and once the tray is installed, each subset of guardrails is rotated around the x direction, so that the posts 270, 271, 272, 273 extend in the extension of the uprights 122, 132 as shown in FIG. figure 7 .

It is then possible to rotate around the upright 271, 273 corresponding to each part of railing 201, 202 folded on itself, then to unfold, by means of the joints 26, these railing parts 201, 202, so that they occupy the entire length of the scaffolding system 1.

The railing portions 201, 202 are then fixed by their end 204, 205 opposite to the end secured to the corresponding amount 271, 273, to the amount 270, 272 of the other set of respective ladder, by means of fastener 208, for example wire locks.

The guard can be put in place by a technician who remains on the ground, which corresponds to a level 3 security.

Once the railing is installed, it is possible to deploy the scaffolding system 1 upwards.

The ladder portions 100, 101, 102, and 110, 111, 112 are slidable relative to one another. More specifically, each upright 120, 121, 122, 122 ', 130, 131, 132, 132' comprises a metal section such as the profiles represented on the figure 8 . This figure shows the sections of three uprights 120, 121, 122 when the respective ladder portions 110, 111, 112 are against each other.

Each post profile 120, 121, 122 comprises sides 63 or fields, and sides 64 or sidewalls, the fields 63 being of smaller dimensions than the blanks 64.

The posts 120, 121, 122, 122 'and 130, 131, 132, 132' are oriented such that the planes of the respective fields 63 are substantially normal to the z direction.

The section of each upright 120, 121, 122 has a recess, or groove, 62 defined in a field with flanges 66 partially closing the recess 62, and a slider member 65 defined in the field 63 opposite the defining field. recess 62 of this amount.

As illustrated on the figure 8 the slide member 65 of a post 121,122 is inserted into the flanged groove 62 of the respective adjacent post 120,121 so that the post 121 is slidable relative to the post 120 and the post 122 can slide relative to the amount 121.

The uprights 120, 121, 122, 130, 131, 132 define, besides a flanged groove 62 on a field, two recesses 61 in the respective two opposite flanks. These recesses 61 allow to receive the steps 3.

Thus, the uprights 120, 121, 122, 130, 131, 132 define two-to-two cooperation means, directly in their normal sides to the length of the scaffolding, here flanged grooves 62 and slide elements 65.

These amounts 120, 121, 122, 130, 131, 132 can thus be of the same width so that it is not necessary to provide several dimensions of step 3.

Moreover, as we see on the figure 8 each of the uprights defines both a flanged groove 62 and a slide member 65, so that the uprights 120, 121, 122, 130, 131, 132 may be identical to each other. This can make it possible to provide a single scale portion model 100, 101, 102, 110, 122, 112, so that the logistics and supply for manufacturing can be relatively simple.

The fields of the intermediate post 121 receive a surface treatment to facilitate the sliding of the amounts relative to each other. This surface treatment is not applied to the flanks of this amount 121, nor to the amounts 120, 122.

In another embodiment, the uprights 120, 121, 122 all receive an identical surface treatment on only one of their fields, for example on the fields corresponding to the T parts 65.

To deploy the scaffolding system in height, it is expected to slide an outer amount 102 or 112 relative to the adjacent amount 101 or 111 respectively, a height corresponding to the height between two adjacent rungs 3, as illustrated by the figure 10 .

In order to prevent such an offset from introducing tensions into the guardrail assembly 20, there are provided connecting elements 28 connected to the respective uprights 130, 132, defining partial links allowing relative movements between the railing posts 270-273 and the ladder posts 122, 122 ', 132, 132' on which these railing posts are installed. Thus, the guardrail assembly 20 can be designed relatively rigidly, because the voltages induced by the height offsets during the vertical deployment will be absorbed by movements of the guardrail relative to the amounts of scale.

With reference to Figures 9 and 15 , the assembly element 28 comprises a part 435 intended to be secured to the upright 271 without any particular clearance, for example by means of a rod fixed by riveting 440 to the upright 271, or the like, and a part 433 intended to cooperate with the amount 132.

When a latch 434 is raised, these parts 433, 435 are rigidly secured to one another, and the element 28 forms a rigid whole.

The part 433 defines with the amount 132 a partial connection, so as to absorb the displacements induced during the deployment of scale sets.

The element 28 comprises a central portion with flanges 438, intended to be inserted between the uprights 271 and 132.

The piece 433 defines a recess 436 to receive a rod (not shown) fixed by riveting 432 or solder to the post 132.

This recess 436 is arranged high enough so that when this piece 433 is (partially) received in the post 132, and the rod is received in the recess 436, the lower rim of the portion 438 remains remote from the upper end of the recess 436. amount 132, as illustrated by the figure 15 .

On the other hand, the upper edge of this central portion 438 may be in contact with the lower end of the upright 271.

The element 28 is thus capable of moving relative to the amount 132.

Foreseeing an articulation with such obvious games can thus make it possible to design a relatively rigid set of railings. This avoids having to distribute games on the smooth and under-smooth. This can be more comfortable and reassuring for users.

Thus, an operator can mount a ladder portion of one of the ladder assemblies by a height corresponding to the height between two respective rungs, then pass to the other side of the scaffolding system and raise the portion of the ladder. opposite scale this time of twice the height between two respective levels. The scaffolding can thus be deployed in height by one person.

The element 28 further defines a pivot connection for the rotation of the guardrail frame to move from the lowered position to the raised position, and vice versa.

More specifically, the piece 28 is in two pieces 433, 435, mounted articulated on a rod 437.

The latch 434 comprises a non-visible hook and blocking, in the locked position, a rod 439, for locking parts 433, 435 relative to each other.

When the handle of this latch 434 is lowered, the part 435 can pivot about the axis (D1). As this piece is integral with the railing frame including the amount, this rotation can help to tilt the railing frame.

When deploying the height of the scaffolding system, it is possible to install the stabilizers 40, in a manner known per se.

During the deployment at height, the outermost ladder portions 102, 112 and the intermediate ladder portions 101, 102 are started.

As is apparent from the figure 1 the lowest scale portions 101, 102 are the least spaced ladder portions of each other. This allows a user of a scaffolding device accessing a tray assembly 30 via the hatch defined in the floor, to access this hatch in a relatively comfortable manner and especially to descend from the scaffold in a relatively secure manner. This stair arrangement can be relatively interesting for a user accessing the tray through the inside of the scaffolding. This can thus make it possible to provide a relatively simple tray access of the hatch type that is simpler and less restrictive to implement than a platform access of the gate type on guardrails.

In addition, the scaffolding device 1 comprises two pre-assembled diagonals 170.

Each diagonal includes a large diameter tube 171 and a small diameter tube 172 installed in the large diameter tube. The small diameter tube of the diagonal may have a diameter for example of 40 mm and the large diameter tube of the diagonal may have a diameter for example of 50 mm.

The large diameter tube 171 is pre-mounted on a lower scale portion, 100 or 110, while the small diameter tube 172 is pre-mounted on an uppermost scale portion 102 or 112.

In the folded state, the tubes of small diameter and large diameter are separated from each other, each tube remaining simply secured to the corresponding portion of scale.

When the ladder portions are deployed in height, the free end of the smaller diameter tube is inserted into the free end of the larger diameter tube. It will be possible to leave the tubes free to move relative to each other until the deployment at height is completed.

A pin system is used to define the length of the diagonal thus formed by these two tubes by blocking relative movements. This locking can be performed when the scaffold 1 has reached the desired height.

Several holes are provided in the larger diameter tube, allowing the length of the diagonal to be adjusted before locking.

This attachment of the diagonals to the ladder portion may be advantageous compared to a fixation with respect to a pre-assembly on the plate only, Indeed, this telescopic diagonal can be pre-assembled and when the plate is moved, the Fixing between the diagonals and the rest of the scaffolding does not need to be defeated. The installation of diagonals is independent of the set of tray, which can be more reassuring.

Also, it may be noted that during the vertical deployment, it is not necessary to uncouple the same tubes of the same diagonal, but simply to leave unlocked the tubes or to unlock to allow these tubes to slide one relative to each other.

The scaffolding system can thus be installed in a relatively simple, fast and intuitive manner and while satisfying a high level of safety requirement.

Thanks to the folding of each subset of railings 220, 221 against the ladder parts, by a rotation about the x axis, one can provide a monobloc guardrail. In other words, the guardrail is independent of the slider system between the ladder parts of the ladder assemblies of the scaffold. This can help to reconcile compactness and height. Thus, the scaffolding system according to the first embodiment of the invention can reach a height of the order of 3 meters, and while remaining relatively compact in the folded state.

It can be seen that since the member 28 is attached to both a guardrail subassembly and a ladder assembly, the guardrail assembly 20 is also pre-mounted, that is, say that it is not possible for the user to misplace it, thus offering greater security.

The Figures 4 and 5 illustrate an alternative embodiment in which the pantograph 60 (or accordion) folding base has been replaced by a folding base 60 'with a spacer element, here a vertical rod 39. figure 14 relates to an embodiment close to that of the Figures 4 and 5 and will be commented simultaneously. On the figure 14 the folding base shown corresponds to the open state.

Like the folding bases 60, the folding bases 60 'remain in the vertical plane (yz) when the scale assemblies 10, 11 are spaced from each other along the length z.

More precisely, the folding base 60 'comprises first elements of the bar type, here rods 45, 45', articulated in x around an articulation 36, and second bar elements, here rods 38, 38 ', articulated in x about a hinge 37. The joints 36 and 37 are located at the ends of the vertical rod 39.

The folding base 60 'further comprises two diagonal rods 44 fixed by a hinge 46 to the rods 45 (or, in not shown embodiments, to the uprights 120, 130).

The other end of these rods 44 is secured to a slide member 53, this element 53 defining a recess in which the rod 39 is received so that this element 53 is able to slide along the vertical rod 39.

As illustrated on the figure 4 , in the folded state, the rods 44 are folded against the rods 45.

When the scale assemblies are spaced from each other, the vertical rod 39 slides relative to this element 53, and to a locking position.

More specifically, the element 53 comprises a slide element here a ring 153, cooperating with another slide element, here the vertical rod 39. More specifically, the ring 153 defines a recess opening, and the vertical rod 39 is received in this recess so as to slide relative to the ring 153.

On the ring 153 is fixed rigidly a support piece 154, on which the rods 44 are pivotally mounted.

The rod 39 defines an orifice that is not visible in the figures, and the ring defines an orifice 403. A pin 401 mounted on a spring 402 can be received in these orifices when they are opposite one another, thus ensuring a triggered lock simply because the ring 153 has reached a predetermined position relative to the rod 39.

A door knob component 404, against which the spring 402 presses, may be manually pushed toward the ring 153 to provide unlocking.

The diagonal bars 44 make it possible to keep the ladder assemblies at a distance.

The ladder assemblies are further separated by two bar members 48, 48 'also articulated and also able to fold against each other by means of a hinge 49 as shown in FIGS. Figures 4 and 5 .

Like the pantograph type folding base, the base 60 'is held in the vertical plane and defines a slide connection for automatically bringing the folding base to a locking position. The lock is set up automatically at the end of the movement, allowing you to reconcile time savings and safety.

More generally, it can further be noted that the (or the, in the embodiment of the figure 7 ) folding base (s) 60 remain (s) in the vertical plane (yz). Each folding base is entirely pre-assembled thanks to the sliding links 43. Thanks to these slide links, each of the rods of the folding base is brought to its position in the automatically deployed state, without particular intervention of the operator.

To return to the figure 1 the wheels 50 are offset by means of adjustable rods, thus allowing the level shifts of the scaffolding system 20. The wheels 50 are pivotable and adjustable in height.

The wheels 50 being offset to the outside, the forces can be better supported and the risk of tilting is lower.

The scaffolding system 1 and the system according to the other embodiments shown can thus be relatively compact in the folded state while having a certain height here of the order of 3 meters in the deployed state and this while complying with the EN 1004 standard.

Claims (11)

Scaffolding system (1) comprising
a support of a tray assembly (30) and a guard rail assembly (20), comprising two ladder assemblies (10, 11) facing each other, each ladder assembly comprising at least two posts (132, 122) and at least two rungs (3) each extending between two posts to allow access to the set of boards by climbing on the rungs, and
the railing assembly (20), said assembly comprising at least one railing post (270, 271, 272, 273) mounted on a corresponding ladder assembly and at least one rod-like member (272, 273, 274, 275, 276, 277) rigidly secured to a corresponding railing post (270, 271), and forming with said railing post a railing frame,
in which
when the scaffold assembly is in the raised position, the railing frame defines a plane coinciding with or near the plane defined by the scale assembly (10, 11) on which the railing post is mounted ( 271, 270),
the system is arranged so that the guardrail assembly moves from a lowered position to a raised position, and vice versa, by a rotation of the guardrail frame about an axis ((D1), (D2) ) having a parallel at a time in a plane defined by said guardrail frame and in a plane defined by the plateau assembly, and
said system is arranged so that during rotation the guardrail frame is outside the scaffolding system, and in the lowered position, the amount of the guardrail frame is folded against an amount of support, said scale amount, corresponding. Scaffolding system (1) according to claim 1, wherein
the railing assembly comprises a rail (21, 22) joined at one end to the railing frame post (271, 273),
the scaffolding system is arranged so that in the raised position, the arm is erected relative to the plane of the guardrail frame, and
the rail is pivotally mounted on the railing post, about an axis parallel to the longitudinal direction of this amount, so as to be folded against the railing frame. Scaffolding system (1) according to claim 2, wherein the rail comprises a hinge (26), on either side of this joint, two rail portions pivotally mounted around the hinge so that said portions can be folded against each other. Scaffolding system (1) according to any one of claims 2 or 3, further comprising removable fastening means (208) of the end of the arm opposite the end assembling the rail to the railing frame to another amount. The scaffolding system (1) according to any one of claims 1 to 4, wherein each ladder assembly comprises a plurality of ladder portions slidable relative to one another in a longitudinal direction to move the scaffolding from a retracted state to an expanded state. The scaffolding system (1) according to any one of claims 1 to 5, further comprising a folding base pre-mounted between the ladder assemblies, and wherein the scaffolding system can move from a closed state, wherein the two sets of ladders are brought closer to each other, in an open state, wherein the two sets of ladders are kept distant from each other by the folding base. Scaffolding system (1) according to any one of claims 1 to 6, wherein, for at least one railing post, the corresponding rod-like element forming with said post the railing frame comprises another railing post (270) and spacer members (276, 277) extending between said railing posts. A scaffolding system (1) according to any one of claims 1 to 7, wherein the guardrail assembly is non-releasably assembled on at least one ladder assembly. A scaffolding system (1) as claimed in any one of claims 1 to 8, further comprising an assembly member (28) including a workpiece (435) mounted to the railing post, and a workpiece (433). mounted on a ladder amount corresponding to this amount of railing. Scaffolding system (1) according to claim 9, wherein the parts (433, 435) are pivotally mounted relative to each other and define a pivot connection for the rotation of the railing frame. A method of mounting a scaffolding system (1) having two ladder assemblies (10, 11) facing each other for supporting a tray assembly (30), each ladder assembly comprising at least two posts (132, 122) and at least two rungs (3) each extending between two posts to allow access to the board assembly by climbing on the rungs, a set of railings (20) , comprising at least one railing post (270, 271, 272, 273) and at least one rod-like element (272, 273) rigidly secured to a corresponding railing post (270, 271), and forming with said guardrail amount a railing frame,
wherein when the scaffold assembly is in the raised position, the railing frame defines a plane coinciding with or near the plane defined by the scale assembly (10, 11) on which the post (271, 270)
comprising
passing the guardrail assembly from a lowered position to a raised position, and vice versa, by pivoting the guardrail frame about an axis having a parallel in the plane defined by the tray assembly and the plane defined by the guardrail frame, so that during rotation the guardrail frame is outside the scaffolding system, and in the lowered position, the amount of the guard frame body is folded against a support amount, said amount of scale, corresponding.

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