FR3070701A1 - SYSTEM FOR FASTENING A STIFFENER AND / OR A GUARD RAIL TO A SCAFFOLDING CAPABLE OF FACILITATING ACCESS TO A SCAFFOLD FLOOR - Google Patents

Abstract

Device (3,43) comprising two uprights (6a, 6b) provided with a recess (7) having a narrowing (9), comprising: a heald (15); two fixing systems (17a, 17b) for securing the device to the uprights, each comprising: fastening means (21) intended to be secured to one end (18) of the stringer; a locking element (28) adapted to be disposed in a locking position (29) and in an unlocking position (30), by means of a control means (33) preventing it, respectively allowing it, to go through the narrowing; the blocking element being intended to be inserted into one of the housings beyond the constriction and arranged, with the control means, on either side of the constriction and the fixing means defining an axis (44) of rotation, relative to the rail, placing the device in an open position where only one of the fastening systems is inserted into one of the housings.

Description

SYSTEM FOR FIXING A STIFFENER AND / OR A GARDECORPS TO A SCAFFOLDING CAPABLE OF FACILITATING ACCESS TO A SCAFFOLDING FLOOR [001] The invention relates to the field of scaffolding, and more particularly to assembly scaffolding.

Scaffolds are structures composed of an arrangement of tubes, so as to form a work station at height for an operator. These are temporary structures, which are found in particular on construction sites.

By scaffolding, here is meant any construction or temporary, fixed or mobile frame, facilitating access to the works and carrying out works.

Are particularly concerned by the present invention: foot scaffolding, that is to say scaffolding on vertical planes for work on facades and parts in elevation; rapid metal scaffolds, in modular elements, sometimes called tubular scaffolds; ceiling scaffolding or horizontal scaffolding, that is to say light tubular scaffolding, generally mobile (rolling) and scaffolding on trestles; the tilting scaffolding carried by cross braces against window frames; fan-shaped scaffolding carried by inclined brackets or pointers, resting on the supports of the bays and immobilized by spacers or struts.

The invention finds a particularly advantageous application for rapid scaffolding.

In a conventional assembly, of fairly old design, a scaffold comprises vertical uprights, formerly known as poles, ecoperches, pointiers, these uprights being spaced in the direction of the length of the scaffolding by horizontal beams. Conventionally, the scaffolding comprises crosspieces such as horizontal dies, tendières, boulins, handling members, platform support, diagonal braces of bracing, connected separately to the uprights or scoops.

Thus, for example, a conventional scaffolding comprises two ladders with uprights and tubular rungs and of round section, the ladders being connected to each other vertically by at least two diagonal bars fixed in a cross and on each side of the scaffolding, the bars being fixed at their ends to ladder rungs.

To make a scaffold, it is thus necessary to attach to uprights, grab bars, struts, ends of connecting elements, of the spacer type, to reinforce, stabilize, stiffen, triangulate. construction, so as to prevent it from collapsing and to avoid relative displacements of the scaffolding parts.

The standards NF EN 12811-1 and NF EN 1004 indicate some requirements which must be met by scaffolding. In particular, between the vertical tubes, called posts, the scaffolding must include lateral protection on workstations, consisting at least of the arrangement of two horizontal tubes, called healds, and a plinth. It should be ensured that the beams cannot be dismantled inadvertently. Tubes mounted diagonally between two posts, and thus called diagonals, must form a brace in the vertical plane of the posts, so as to ensure the stability of the scaffolding, despite the stresses it supports such as stresses due to the wind , to the movements of the operators, to the expense of the tools of the operators, to the movements of the ground.

In general, the rails and the diagonals are fixed to the posts by means of screws. However, the use of hardware also requires the use of suitable tools, which complicates the installation of the scaffolding and increases its time on a site.

The scaffolding being a temporary structure, it is advantageous to be able to easily and quickly erect it then dismantle it, to store it and to reassemble it for later use.

This is why means for assembling healds and diagonals have been developed for this purpose.

[013] For example, document FR 2 922 929 proposes to mount a heddle between two scales of the scaffolding, by means of a hook which can be locked on a bar. To this end, the hook is manipulated by a pole to lock and unlock it. Although such a hook device makes it possible to assemble and disassemble the boom without damaging the scaffolding tubes, the handling of the pole requires a certain dexterity on the part of the operator, making the steps of assembly and disassembly.

In order to facilitate assembly and disassembly, locking handles have been developed allowing two tubes to be blocked by rotation of the handle around an axis passing through the two tubes, so that the handle grips the two tubes one on top of the other.

Document FR 2 880 048 describes an example of such a handle for locking a diagonal on a post. For this purpose, the end portion of the diagonal is flattened. The handle has a first extreme right part inserted first in a hole in the flat portion of the diagonal then in a hole in the post, forming the axis of rotation. The handle also has a second U-shaped part, ending in a grip zone, which pinches the post when pivoting around the axis, and thus clamps the post against the diagonal. By rotating the handle in the opposite direction, the post and the diagonal are unlocked.

Document FR 2 887 272 describes another example of a locking handle, operating in a manner substantially identical to the handle of document FR 2 880 048, but the second tightening part of which ends with an elastic return passing behind the post when the handle is in the locked position.

Document FR 2 970 023 describes a device for locking two scaffolding elements, this device comprising a handle obtained by folding a wire element, this handle comprising a flange part, the locking of a secondary element such as a diagonal, on a main element such as a scaffolding upright, being obtained by elastic deformation of the part of the handle forming a flange, during manual pivoting of the handle.

Document FR 2 927 919 describes a locking handle with assembly nuts for scaffolding ladders. The assembly nut is mounted to rotate freely on a hub fixed on a diagonal end. The assembly nut is provided with sliding ramps allowing its pre-positioning in a non-circular reservation of the upright, without manual intervention. The diagonal is locked on the scaffolding upright by manual rotation of a handle pressing against the upright with increasing clamping force.

One can also refer to documents EP 2314796, EP 2314797.

A first objective is to propose a system for fixing a stiffener and / or a railing to a scaffold, reducing the time for fixing and dismantling the stiffener and / or the railing. A second objective is to propose such a fixing system, which is easy to fix on a support of the scaffolding and to separate from it.

[022] A third objective is to propose such a fixing system capable of facilitating access to a floor of the scaffolding.

A fourth objective is to propose such a fixing system, which is light and compact.

A fifth objective is to propose such a fixing system, simple to manufacture.

[025] For these purposes, there is proposed, according to a first aspect, a device for scaffolding comprising a first upright and a second upright, the device comprising:

a heald, a first fixing system and a second fixing system, the first fixing system being intended to secure the device to the first post of the scaffolding and the second fixing system being intended to secure the device to the second post, these uprights each being provided with a housing, the housing having a narrowing, each fixing system comprising:

a fixing means intended to be secured to one end of the heddle, a movable blocking element between a blocking position preventing it from going through the narrowing and an unlocking position allowing it to go through the narrowing, a means of control integral with the locking element, the control means being configured to place the locking element in the locking position or in the unlocking position, the locking element being intended, when it is in the unlocking position , to be inserted into the housing of one of the uprights beyond the narrowing so that, when the blocking element is in the blocking position, the blocking element and the control means are arranged on either side other of the narrowing and the fixing means defining an axis of rotation around which the fixing means is able to pivot relative to the heddle so as to arrange the device in a po open position where the first fastening system is inserted into the housing of the first upright and where the second fastening system is, when it is in the unlocked position, suitable for being inserted into or out of the housing of the second upright.

[026] Various additional characteristics can be provided for the fixing system, alone or in combination:

the blocking element of each fixing system has, substantially perpendicular to a direction in which the blocking element is able to pass through the narrowing, a first blocking dimension and a second blocking dimension having the following characteristics:

the first blocking dimension and the second blocking dimension are less than or equal to a first dimension for passage of the narrowing, the first blocking dimension is greater than a second dimension for passing the narrowing, the second blocking dimension is less than or equal to the second passage dimension;

the locking element has an oblong shape;

the locking element is movable, between the locking position and the unlocking position, in rotation about an axis securing the locking element and the control means;

the axis comprises a flat configured to drive the locking element in rotation, the locking element being movable in translation along the flat;

each fixing system comprises a projection provided with a hole through which the axis crosses the projection so that the locking element and the control means are arranged on either side of the projection, the projection , having a shape substantially complementary to the shape of the narrowing, is intended to be inserted in the housing of the upright;

the control means include:

a locking lug capable of locking, in cooperation with a notch in the fixing system of shape substantially complementary to the shape of the locking lug, the locking element in the locking position, an unlocking lug, of substantially shaped complementary to the shape of the notch, capable of locking, in cooperation with the notch, the locking element in the unlocked position;

the heddle comprises a folding member provided with two parts movable between them according to a rotational movement, the folding member being intended to allow the device to be folded so as to reduce its bulk.

[027] It is proposed, secondly, a stiffener for scaffolding, comprising two devices as presented above, at least one cross member joining the two beams, each fixing system being secured, by means of their fixing means , at one of the ends of the rails.

[028] It is proposed, thirdly, a scaffolding comprising: two supports, each provided with two uprights and at least two bars connecting the two uprights, the bars crossing each side of each upright so as to define in each upright at least two housings each having a narrowing, a floor connecting the two supports, the scaffolding also comprising: a device as presented above, the blocking element of each fixing system of the device being intended to pass in one of the narrowing of the uprights, and / or a stiffener as presented above, the blocking element of each fastening system of the stiffener being intended to pass through one of the narrowing of the uprights.

[029] Other characteristics and advantages of the invention will appear more clearly and concretely on reading the following description of embodiments, which is made with reference to the appended drawings in which:

Figure 1 is a schematic perspective view of a platform provided with two supports and a Figure 2 is a schematic perspective view of a housing of one of the supports and a fastening system of the stiffener including an element blocking device is arranged in an unlocking position, the fixing system being extracted from the housing;

Figure 3 is a schematic perspective view of the fastening system, the fastening element is arranged in a locking position;

Figure 4 is a schematic side sectional view, along the plane C-C shown in Figures 5 and 7 of the fixing system inserted in the housing, the locking element being in the locking position;

Figure 5 is a schematic sectional view from above, along the plane D-D shown in Figures 4 and 6 of the fixing system inserted in the housing, the locking element being in the locking position;

Figure 6 is a schematic side sectional view, along the plane C-C shown in Figures 5 and 7 of the fixing system inserted in the housing, the locking element being in the unlocked position;

Figure 7 is a schematic sectional view from above, along the plane D-D shown in Figures 4 and 6 of the fixing system inserted in the housing, the locking element being in the unlocked position;

Figure 8 is a schematic perspective view of a different embodiment of the platform provided with two supports, a stiffener and two railings, the stiffener being arranged in an open position.

The invention finds particular application in platforms and scaffolding with ladders formed by rungs crimped in the uprights, these rungs being of oval or oblong section, such rungs being described in particular in document EP 1 762 694 of the applicant .

[031] The structure of such scales is advantageous for at least two reasons. First, the risks of rotation of the rung on itself, when using the ladder, are reduced. Secondly, such scales can be made of aluminum alloy, with an excellent weight / mechanical strength ratio, in particular compared to conventional steel scales. During assembly by crimping, the tubular rungs are provided, on their two lateral ends, with at least one constriction which engages in the holes of the uprights. The end of these necks protrudes from the external face of the uprights. It is deformed by crimping, or even by rolling, embossing, or stamping. The steps thus have an apparent opening, advantageously bordered by a collar obtained by rolling and pressing under a roll.

In Figure 1 is partially shown a scaffolding, comprising a platform 1 formed of two supports 2 of ladder type, a stiffener 3 and a floor 4. The railings are not shown, for simplification .

The supports 2 support the floor 4 in a substantially horizontal position, at a predetermined height. The floor 4 is thus intended to support an individual, allowing him to perform work at height, or facilitating him access at height.

[034] Each support 2 comprises bars 5 and two uprights 6a, 6b, to which are fixed the bars 5 forming steps. The bars 5 are preferably fixed substantially perpendicular to the uprights 6a, 6b and arranged substantially equidistant from each other, so as to form a ladder.

According to the example illustrated, the uprights 6a, 6b include housings 7 through which the bars pass 5. According to examples not shown, the uprights 6a, 6b include more housings 7 than bars 5 or bars 5 are fixed to the uprights 6a, 6b without passing through the housings 7.

The bars 5 and uprights 6a, 6b have, for example, a cross section of rectangular, square, ellipsoidal or circular shape.

[037] Each housing 7 has at least one opening 8 and a narrowing 9. According to the embodiment shown, the opening 8 and the narrowing 9 are arranged in an aligned and consecutive manner.

[038] Each narrowing 9 comprises a first dimension 10 for passage and a second dimension 11 for passage less than the first dimension 10 for passage.

[039] According to the illustrated embodiment, the first passage dimension and the second passage dimension 11 are measured in substantially perpendicular directions.

[040] As shown in Figures 4 to 7, according to embodiments, the bars 5 comprise two end portions 12 of complementary shape to the shape of the housings 7 in which the end portions 12 are inserted.

[041] During assembly by crimping, according to the embodiment shown, the end portions 12 of the tubular bars 5 each form a constriction which engages in the holes of the uprights 6a, 6b. The end of these necks protrudes from the external face of the uprights 6a, 6b. The end of the necks is deformed by crimping, or even by rolling, embossing, or stamping. The rungs formed by the bars 5 thus have an apparent opening, advantageously bordered by a collar 13 obtained by rolling and pressing under a rolling.

[042] The bars 5 comprise a central part 14 having a cross section of which at least one dimension is greater than a dimension of the end parts 12. The central part 14 is disposed between the uprights 6a, 6b of the support 2.

[043] As illustrated in FIG. 1, the stiffener 3 comprises two healds 15 and cross members 16 joining the healds 15 so as to form a substantially non-deformable frame. According to a different embodiment, not shown, the stiffener 3 comprises a single crosspiece

16.

[044] As shown in FIG. 8 illustrating a platform 1 formed, according to a different embodiment, of two supports 2 of ladder type, of a stiffener 3, of a floor 4 and of two railings 43, each railing 43 comprising a rail 15.

According to embodiments not shown, each heald 15 of the stiffener 3, respectively the heald 15 of each railing 43, comprises a folding member, configured to allow the folding of the stiffener 3, respectively of each railing 43, on myself. The folding member comprises two parts which are movable together in a rotational movement. The folding members are, for example, arranged substantially in the middle of the heddles 15. Such folding members make it possible to reduce the size of the stiffener 3 and the guardrails 43 during their storage.

[046] The stiffener 3 also includes four fixing systems 17a, 17b. Each railing 43 comprises two fixing systems 17a, 17b. The fastening systems 17a, 17b are arranged at the ends 18 of the heddles 15. The fastening systems 17a, 17b are intended to secure the stiffener 3, respectively the railings 43, and the supports 2.

[047] FIGS. 2 and 3 represent an enlarged perspective view of the platform 1, centered on one of the fixing systems 17a, 17b, the fixing system 17a, 17b being extracted from the housing 7.

[048] Figures 4 to 7 show an enlarged view, in section respectively on a plane CC and a plane DD, of the platform 1, centered on one of the fixing systems 17a, 17b, the fixing system 17a, 17b being inserted in housing 7.

[049] Figures 2, fixing the stiffener 3.

as well as the identical beams 15, the figures mutandis, one of the systems FIGS. 3, 4 and 6 represent, systems 17a, 17b for fixing the [050] and 7 represent a system 17a, 17b for However, the systems 17a, 17b for stiffener 3 and guardrails 43 being 5 and 7 could represent, 17a, 17b for fixing the guardrails, for their part stiffener 3 or guardrails 43. for fixing comprises a body of the

2, mutatis

43.

The

The system 17a, 17b one of the main and a blocking member 20.

[051] The main body 19 comprises a fixing means 21, intended to secure the system 17a, 17b for fixing to one of the ends 18 of one of the heddles 15 of the stiffener 3.

[052] The fixing means 21 defines an axis 44 of rotation about which the fixing means 21 is able to pivot relative to the heald 15 with which the fixing means 21 is integral.

[053] According to one embodiment, the fixing means 21 comprises a screw 22 and a nut 23. The screw 22 is intended to be inserted in a slot 24 in the end 18 of the heddle 15.

[054] The screw 22 preferably extends into the main body 19. Thus, the main body 19 is stiffened and the screw 22 is locked in rotation relative to the main body 19.

[055] The main body 19 also includes a projection 25 intended to be inserted into the housing 7. The projection 25 has a shape substantially complementary to the housing 7. Thus, when the support 2 is inserted in the housing 7, the projection 25 blocks degrees of freedom between the fixing system 17a, 17b and the support 2, in order to increase, by means of the stiffener 3, the relative rigidity of the supports 2.

[056] The main body 19 includes a stop 26, intended to bear against the upright 6a, 6b so as to block the insertion of the system 17a, 17b for fixing in the housing 7 at a predefined position.

[057] The stop 26 preferably has a shape complementary to the shape of the upright 6a, 6b. The shape of the stop 26 makes it possible, as for the advance 25, to reduce the number of degrees of freedom between the fixing system 17a, 17b and the support 2 in order to increase, by means of the stiffener 3, the relative rigidity supports 2.

[058] According to the illustrated embodiment, the main body 19 includes a recess 27. The recess 27 has a shape complementary to the collars 13 of the bars 5, so that the stop 26 comes into contact with the upright 6a, 6b without being embarrassed by the collar

13.

[059] The blocking member 20 of the fixing system 17a, 17b comprises a blocking element 28, movable between a blocking position 29 (shown in FIGS. 3, 4 and 5) and a release position 30 (shown on Figures 2, 6 and 7).

In the unlocking position 30, the blocking element 28 is able to pass through the narrowing 9, allowing insertion of the fixing system 17a, 17b into the housing 7 or extraction of the fixing system 17a, 17b outside housing 7.

[061] In the blocking position 29, the blocking element 28 cannot pass through the narrowing 9, blocking an insertion of the system 17a, 17b for fixing in the housing 7 or an extraction of the system 17a, 17b for fixing out housing 7.

[062] The locking element 28 is preferably movable between the locking position 29 and the unlocking position 30 in a rotational movement around the direction in which the fixing system 17a, 17b is inserted into the housing 7.

[063] The blocking element 28 has a first blocking dimension 31 and a second blocking dimension 32 smaller than the first blocking dimension 31.

[064] According to the illustrated embodiment, the first blocking dimension 31 and the second blocking dimension 32 are measured in substantially perpendicular directions.

[065] The first dimension 31 for blocking the blocking element 28 is less than or equal to the first dimension 10 for passage of the narrowing 9.

The second blocking dimension 32 is less than or equal to the second passage dimension 11.

[067] In order to pass the blocking element 28 through one of the constrictions 9, the blocking element 28 is disposed in the unlocking position 30.

The first blocking dimension 31 and the first dimension 10 for the passage of said narrowing 9 follow substantially the same first direction. The second blocking dimension 32 and the second dimension 11 for the passage of said narrowing 9 follow substantially the same second direction.

[069] The first dimension 31 for blocking the blocking element 28 is greater than the second dimension 11 for passing the narrowing 9.

In order to prevent the passage of the blocking element 28 through one of the constrictions 9, the blocking element 28 is disposed in the blocking position 29.

The first blocking dimension 31 and the second dimension 11 for the passage of said narrowing 9 follow substantially the same second direction. The second blocking dimension 32 and the first dimension 10 for the passage of said narrowing 9 follow substantially the same first direction.

[072] According to the embodiment shown, the blocking element 28 has a substantially oblong shape.

[073] The locking member 20 comprises a control means 33, configured to move the locking element 28 between the locking position 29 and the unlocking position 30.

[074] According to the embodiments shown, the control means 33 comprises a protruding locking pin 34. The locking lug 34 is able to cooperate with a notch 35 in the main body 19. The locking lug 34 is configured so as to maintain the control means 33 and therefore the locking element 28 in the locking position 29.

[075] The locking lug 34 thus improves the security of the platform 1, when the fixing system 17a, 17b is inserted into the housing 7 of one of the supports 2 so that the fixing system 17a, 17b cannot not be extracted or extracted from the housing 7 accidentally.

[076] The control means 33 comprises a protruding unlocking lug 36. The unlocking lug 36 is able to cooperate with the notch 35 of the main body 19. The unlocking lug 36 is configured so as to keep the control means 33 and therefore the locking element 28 in the unlocked position 30.

[077] The unlocking lug 36 thus facilitates the handling of the stiffener 3, respectively of each railing 43, by allowing a single individual to insert the systems 17a, 17b for fixing in the housings 7 of the supports 2 or d 'extract the systems 17a, 17b for fixing the housings 7 without the locking elements 28 moving into the locking position 29 accidentally.

[078] The locking lug 34 and the unlocking lug 36 preferably have a shape complementary to the shape of the notch 35. The locking lug 34, the latch lug 36 and the notch 35 have, according to the preferred embodiment, a substantially cylindrical shape.

[079] The blocking member 20 also comprises an axis 37 connecting the blocking element 28 and the control means 33.

The axis 37 preferably comprises two flats 38, arranged on either side of the axis 37. The flats 38 are configured to cooperate with an orifice 39 of the blocking element 28.

[081] The orifice 39 has, according to the embodiment shown, a substantially oblong shape, comprising two dishes 40 substantially parallel.

[082] The dishes 40 of the orifice 39 are configured to cooperate with the flats 38 of the axis 37. The orifice 39 is configured to block a relative rotational movement between the blocking element 28 and the axis 37 , around the direction in which the fixing system 17a, 17b is inserted into the housing 7, while leaving free in translation the element 28 for locking relative to the axis 37, along planes defined by said dishes 40 and the flats 38.

[083] The axis 37 also comprises two walls 41 arranged on either side of each flat 38. The blocking element 28 is disposed between the walls 41, so as to substantially block the position of the element 28 of blocking with respect to the axis 37 in the direction in which the fixing system 17a, 17b is inserted in the housing 7.

[084] In a different embodiment, the axis 37 comprises a single flat 38 able to cooperate with one of the dishes 40 of the orifice 39 of the blocking element 28.

[085] According to the illustrated embodiment, the projection 25 of the main body 19 comprises a hole 42. The axis 37 crosses the projection 25 through the hole 42.

[086] The blocking member 20 is arranged such that the blocking element 28 and the control means 33 are arranged on either side of the hole 42.

[087] According to the embodiment shown, the hole 42 also extends through the stop 26.

[088] The axis 37 extends into the control means 33. Thus, the control means 33 is stiffened and the axis 37 is locked in rotation relative to the control means 33.

[089] According to certain embodiments, the main body 19 is in one piece. The main body 19 and / or the control means 33 are produced by molding, for example made of aluminum alloy, of polymer material or of composite.

In order to insert the fixing system 17a, 17b in a housing 7, the blocking element 28 is placed in the unlocking position 30. The unlocking lug 36 of the control means 33 thus cooperates with the notch 35 of the main body 19, so as to maintain the locking element 28 in the unlocking position 30.

[091] The fixing system 17a, 17b is inserted into said housing 7 until the stop 26 of the main body 19 comes into contact with the upright 6a, 6b. The blocking element 28 is then passed through the constriction 9 and is disposed beyond the constriction 9, on the side of the constriction 9 opposite the opening 8 of the housing 7.

[092] The blocking element 28 is then placed in the blocking position 29. The locking pin 34 of the control means 33 thus cooperates with the notch 35 of the main body 19, so as to maintain the locking element 28 in the locking position 29.

[093] In order to extract the system 17a, 17b for fixing a housing 7, the blocking element 28 is disposed in the unlocking position 30. The unlocking lug 36 of the control means 33 thus cooperates with the notch 35 of the main body 19, so as to maintain the locking element 28 in the unlocking position 30.

[094] The fixing system 17a, 17b is extracted from said housing 7. The blocking element 28 is then passed through the narrowing 9 and then through the opening 8 of the housing 7.

[095] In order to fix the stiffener 3, respectively the railings 43, to the uprights 6a, 6b of the supports 2, the elements 28 for blocking the fixing systems 17a, 17b are arranged in the unlocking position 30. Each unlocking lug 36 thus cooperates with its respective notch 35, so as to maintain the locking elements 28 in the unlocked position 30.

[096] According to a first method, the fastening systems 17a, 17b are inserted at the same time, through the frame of the stiffener 3, respectively through the rail 15 of the railings 43, in their respective housing 7 up to 'that the stops 26 come into contact with the uprights 6a, 6b. The blocking elements 28 are then passed through the respective constrictions 9 and are arranged beyond the constrictions 9, on the side of the constrictions 9 opposite the openings 8 of the housings 7.

The blocking elements 28 are then placed in the blocking position 29. Each locking pin 34 thus cooperates with its respective notch 35, so as to maintain the locking elements 28 in the locking position 29.

[098] According to a second method, two first systems 17a for fixing the four systems 17a, 17b for fixing the stiffener 3 disposed on the same support 2 are inserted at the same time, respectively a first system 17a for fixing the two systems 17a, 17b for fixing the railings 43 is inserted into their respective housing 7 until the stops 26 come into contact with a first upright 6a of the uprights 6a, 6b. The blocking elements 28 of said first fixing systems 17a then pass through the respective narrowing 9 and are arranged beyond the narrowing 9, on the side of the narrowing 9 opposite to the openings 8 of the housings 7.

Said blocking elements 28 are then placed in the blocking position 29. Each locking pin 34 thus cooperates with its respective notch 35, so as to maintain the locking elements 28 in the locking position 29.

The stiffener 3, respectively said railing 43, is then rotated about the axis 44 of rotation defined by the means 21 for fixing the first fastening systems 17a inserted in housings 7 so as to insert, in their respective housing 7, the two second systems 17b for fixing the stiffener 3, respectively the second system 17b for fixing the railings 43, not yet inserted until the stops 26 come into contact with the second upright 6b of the uprights 6a, 6b. The locking elements 28 of said second fixing systems 17b then pass through the respective narrowing 9 and are arranged beyond the narrowing 9, on the side of the narrowing 9 opposite to the openings 8 of the housings 7.

Said blocking elements 28 are then placed in the blocking position 29. Each locking pin 34 thus cooperates with its respective notch 35, so as to maintain the locking elements 28 in the locking position 29.

In order to separate, according to a first method, the stiffener 3, respectively one of the railings 43, the uprights 6a, 6b, the elements 28 for blocking the respective fixing systems 17a, 17b are arranged in the position 30 of release. Each unlocking lug 36 thus cooperates with its respective notch 35, so as to maintain the locking elements 28 in the unlocked position 30.

The systems 17a, 17b for fixing the stiffener 3, respectively of said railing 43, are extracted at the same time, through the frame of the stiffener 3, respectively through the rail 15 of the railings 43, of their respective housing 7. The blocking elements 28 are then passed through the respective constrictions 9, then through the openings 8 of the housings 7.

In order to separate, according to a second method, the stiffener 3, respectively one of the railings 43, of the uprights

6a, 6b, the locking elements 28 of the second fixing systems 17b, or of the first fixing systems 17a, of the stiffener 3 disposed on the same support 2 are extracted at the same time, respectively the locking element 28 of the second system 17b of attachment, or of the first attachment system 17a, of the guardrails 43 is extracted, by means of a rotation of the stiffener 3, respectively of said guardrail 43, about the axis 44 of rotation defined by the means 21 for fixing said second fixing systems 17b, or said first fixing systems 17a, for their respective housing 7. The blocking elements 28 are then passed through the respective constrictions 9, then through the openings 8 of the housings 7.

The first two fastening systems 17a, or the second two fastening systems 17b, of the stiffener 3, respectively the first fastening system 17a, or the second fastening system 17b, of the railings 43, still inserted in their respective housing 7 are then arranged in the unlocking position 30, each unlocking lug 36 cooperating with its respective notch 35 so as to maintain the locking elements 28 in the unlocking position, said first fixing systems 17a, or second systems 17b for fixing, the stiffener 3, respectively of said railing 43, being extracted at the same time from their respective housing 7.

Such fastening systems 17a, 17b are thus easy to fix to the supports 2 of the platform 1 and to separate from them.

The fixing system 17a, 17b also makes it possible to have the stiffener 3 and / or one or more guardrails 43 in an open position, shown, for the stiffener 3, in FIG. 8.

The stiffener 3 and / or the guardrail (s) 43 thus disposed in the open position define a device such as a gate facilitating access to an operator to the floor 4 of the platform 1.

These devices 3.43 improve working comfort and safety by avoiding, for example, that an operator straddles the device 3.43 to access the floor 4. The devices 3.43 also improve the speed of work by proposing a gate capable of being moved easily and quickly between the open position and a closed position preventing an operator present on the floor 4 from falling therefrom.

The fixing system 17a, 17b is light, compact and simple to manufacture.

The fixing system 17a, 17b as described makes it possible to secure the fixing of a stiffener 3 to supports 2 of a platform 5 1.

The fixing system 17a, 17b also makes it possible, for a single individual, to fix a stiffener 3 to the supports 2 of a platform 1 and to separate the stiffener 3 from the supports 2.

Claims (10)

1. Device (3,43) for scaffolding comprising a first upright (6a) and a second upright (6b), the device (3,43) comprising: a heald (15), a first fixing system (17a) and a second fixing system (17b), the first fixing system (17a) being intended to secure the device (3,43) to the first upright (6a) of the scaffolding and the second fixing system (17b) being intended to secure the device (3,43) to the second upright (6b), these uprights (6a, 6b) each being provided with a housing (7), the housing (7) having a narrowing (9), each fixing system (17a, 17b) comprising: fixing means (21) intended to be integral with one end (18) of the heddle (15), a movable blocking element (28) between a blocking position (29) preventing it from passing through the narrowing ( 9) and an unlocking position (30) allowing it to pass through the narrowing (9), a control means (33) integral with the blocking element (28), the control means (33) being configured to have the blocking element (28) in the blocking position (29) or in the unlocking position (30), the blocking element (28) being intended, when in the unlocking position (30), to be inserted into the housing (7) of one of the uprights (6a, 6b) beyond the narrowing (9) so that, when the locking element (28) is in the locking position (29), the blocking element (28) and the control means (33) are arranged on either side of the constriction (9) and the fixing means (21) defining an axis (44) of rotation on which the fixing means (21) is able to pivot relative to the heald (15) so as to place the device (3,43) in an open position where the first fixing system (17a) is inserted in the housing (7) of the first upright (6a) and where the second fixing system (17b) is, when in the unlocked position (30), suitable for being inserted into or out of the housing (7) for the second upright (6b ). 2. Device (3.43) according to the preceding claim, characterized in that the element (28) for locking each fixing system (17a, 17b) has, substantially perpendicular to a direction in which the element (28) blocking is able to pass through the narrowing (9), a first blocking dimension (31) and a second blocking dimension (32) having the following characteristics: the first blocking dimension (31) and the second blocking dimension (32) are less than or equal to a first dimension (10) for passage of the constriction (9), the first blocking dimension (31) is greater than a second dimension (11) for passage of the narrowing (9), the second dimension (32) for blocking is less than or equal to the second dimension (11) for passage. 3. Device (3.43) according to the preceding claim, characterized in that the blocking element (28) has an oblong shape. 4. Device (3,43) according to any one of the preceding claims, characterized in that the blocking element (28) is movable, between the blocking position (29) and the unlocking position (30), in rotation about an axis (37) joining the locking element (28) and the control means (33). 5. Device (3.43) according to the preceding claim, characterized in that the axis (37) comprises a flat (38) configured to rotate the locking element (28), the element (28) of blocking being movable in translation along the flat (38). 6. Device (3,43) according to any one of claims 4 and 5, characterized in that each system (17a, 17b) for fixing comprises a projection (25) provided with a hole (42) through which the axis (37) crosses the projection (25) so that the locking element (28) and the control means (33) are arranged on either side of the projection (25), the projection ( 25), having a shape substantially complementary to the shape of the narrowing (9), is intended to be inserted into the housing (7) of one of the uprights (6a, 6b). 7. Device (3,43) according to any one of the preceding claims, characterized in that the control means (33) comprises: a locking lug (34) capable of locking, in cooperation with a notch (35) of the fixing system (17a, 17b) of shape substantially complementary to the shape of the locking lug (34), the element (28 ) blocking in the blocking position (29), an unlocking lug (36), of shape substantially complementary to the shape of the notch (35), capable of blocking, in cooperation with the notch (35), l blocking element (28) in the unlocking position (30). 8. Device (3,43) according to any one of the preceding claims, characterized in that the heddle (15) comprises a folding member provided with two parts movable between them according to a rotational movement, the folding member being intended to allow folding of the device (3.43) so as to reduce its size. 9. Stiffener (3) for scaffolding, comprising: two devices (3,43) according to one of the preceding claims, at least one crosspiece (16) joining the two beams (15), each fixing system (17a, 17b) being integral, by means of their means (21 ) of fixing, at one of the ends (18) of the healds (15). 10. Scaffolding (1) comprising: two supports (2) each provided with two uprights (6a, 6b) and at least two bars (5) connecting the two uprights (6a, 6b), the bars (5) crossing on each side each upright ( 6a, 6b) so as to define in each upright (6a, 6b) at least two housings (7) each having a narrowing (9), a floor (4) connecting the two supports (2), the scaffolding also comprising: a device (3,43) according to any one of claims 1 to 8, the element (28) for blocking each system (17a, 17b) for fixing the device (3,43) being intended to pass through one of the narrowing (9) of the uprights (6a, 6b), and / or 5 - a stiffener (3) according to claim 9, the element (28) for locking each system (17a, 17b) for fixing the stiffener (3) being intended to pass through one of the constrictions (9) of the uprights (6a , 6b).