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EP1766157B1 - Platform support device for lifting loads or persons the height of a structure - Google Patents

Platform support device for lifting loads or persons the height of a structure Download PDF

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Publication number
EP1766157B1
EP1766157B1 EP05763731.6A EP05763731A EP1766157B1 EP 1766157 B1 EP1766157 B1 EP 1766157B1 EP 05763731 A EP05763731 A EP 05763731A EP 1766157 B1 EP1766157 B1 EP 1766157B1
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EP
European Patent Office
Prior art keywords
platform
mast
masts
cable
modular
Prior art date
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Application number
EP05763731.6A
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German (de)
French (fr)
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EP1766157A1 (en
Inventor
Bruno Patron
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Fixator
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Fixator
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G1/00—Scaffolds primarily resting on the ground
    • E04G1/18—Scaffolds primarily resting on the ground adjustable in height
    • E04G1/20—Scaffolds comprising upright members and provision for supporting cross-members or platforms at different positions therealong
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B9/00—Kinds or types of lifts in, or associated with, buildings or other structures
    • B66B9/16—Mobile or transportable lifts specially adapted to be shifted from one part of a building or other structure to another part or to another building or structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B9/00—Kinds or types of lifts in, or associated with, buildings or other structures
    • B66B9/16—Mobile or transportable lifts specially adapted to be shifted from one part of a building or other structure to another part or to another building or structure
    • B66B9/187—Mobile or transportable lifts specially adapted to be shifted from one part of a building or other structure to another part or to another building or structure with a liftway specially adapted for temporary connection to a building or other structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F11/00—Lifting devices specially adapted for particular uses not otherwise provided for
    • B66F11/04—Lifting devices specially adapted for particular uses not otherwise provided for for movable platforms or cabins, e.g. on vehicles, permitting workmen to place themselves in any desired position for carrying out required operations

Definitions

  • the present invention relates to a platform support device for the elevation of loads or persons along a structure, particularly for the execution of work applied to said structure, this device comprising, in combination with a platform, lifting elements of the winch type platform to adjust at will the elevation level of the platform, modular elements assemblable forming the mast to reach a desired height, the establishment of each mast element s' carrying out from the load platform reliable to the masts on the one hand by the winch type lifting elements disconnectable at will said masts, on the other hand by means of temporary immobilization of the platform relative to a modular element of each mast to allow, in the immobilized state of the platform, the addition or the deletion at the top of the masts of at least one modular element as a function of the height of levation the desired platform.
  • the work along high-rise building facades is mostly done from so-called suspended scaffolds.
  • Such scaffolding consists of a platform on which winches are embedded, the platform being suspended from the roof of the construction by cables attached to the inserts on the roof.
  • Such a solution is satisfactory when the roof is easily accessible and it is possible to install the cable hooking elements and counterweights necessary for proper operation of the assembly. Otherwise, the operators are poor.
  • the masts are connected by an anchor shown in FIGS 9, this anchor marking the end of the progression in height of the platform and making it impossible to use such a device. scaffolding for work at great heights.
  • the patent FR-A-625 646 describes a scaffolding whose platform is supported by independent masts that can be attached to a façade by means of buttresses.
  • the platform is formed again of a console and two sleeves each sliding along a mast as shown in FIG. figure 1 of this patent or the passage column 2 - lines 19 to 26 of the description.
  • Said buttresses therefore constitute an obstacle to the descent of the platform which can not be fully lowered only during dismantling of the masts and removal of the buttresses.
  • This solution therefore prevents free movement in up and down the platform along the masts.
  • the platform / mast connection using a sliding sleeve requires, in the case of a three mast construction, a synchronous displacement of the entire platform.
  • An object of the present invention is therefore to provide a platform support device for the elevation of loads or people along a structure whose design allows to reach any heights and in particular large heights.
  • the masts being positioned at the ends of the platform which is thus housed in the space left free between said masts, plus any constraint in terms of elevation of the platform form because of the anchoring of the masts to the work is noticeable.
  • the platform support device 1A, 1B object of the invention, must allow the lifting of people and / or loads at great heights generally of the order of 50 meters or more in order to to facilitate, in particular, renovation work on building facades.
  • This platform support device must be able to be set up from the ground without having to use the roof of the construction.
  • This platform support device comprises, as mentioned above, in combination with a platform 1A or 1B, elements 2, 3 elevators of the winch type platform to adjust at will the level of elevation of the platform 1A, 1B as well as modular elements 4, 6 assemblable forming mast to reach a desired height.
  • each mast element 4 is made from the platform 1A, 1B load connectable to the masts on the one hand by the elements 2, 3 hoist-type lifts disconnectable at will from said masts, on the other hand by temporary immobilization means 5 of the platform 1A, 1B relative to a modular element 4 of each hook-type mast.
  • temporary immobilization means 5 of the platform 1A, 1B relative to a modular element 4 of each hook-type mast.
  • the winch 2 is again actuated to allow the platform 1A, 1B to be raised. until a new temporary immobilization of the platform along the masts and then again, the addition of a new modular element 4 for each mast.
  • the operation can be repeated until the desired height is reached.
  • the platform can thus be raised to any height by virtue of the fact that the platform 1A, 1B is placed between the two modular masts 16, 17 forming an elevation path.
  • the anchoring of the masts 16, 17 to the front of the structure does not prevent such an elevation of the platform.
  • the installation is intended to achieve great heights, the number of modular elements to form each mast is relatively important.
  • this platform support device 1A, 1B has the advantage of allowing the reuse of most of its elements for the production of a suspended platform. All of these advantages will be developed in more detail below from the detailed description of the platform support device.
  • lifting elements 2, 3 consist of at least one winch body 2 embedded on the platform 1A, 1B and a cable 3 extending between mast and platform 1A, 1B.
  • the fact of loading the body 2 of winch on the platform 1A, 1B makes it possible, during disassembly of the platform, to have a platform and a winch ready for use for the realization of a suspended platform.
  • the winch body 2 is of the continuous cable passage type of any length to prevent the platform 1A, 1B, under certain conditions, to support the entire weight of the cable 3.
  • the winch is not a drum winch in which case the cable is wrapped around the winch body and unrolls or wraps as the platform is raised.
  • An example of such a winch with continuous cable passage of any length is described in particular in the patent FR-A-2618421 .
  • These winches generally consist of a pulley provided with a grip groove and a cam for locking the cable inside said grip groove. The cable is able to extend beyond this pinching zone and thus tends from the winch as illustrated by FIG. figure 1 to come to rest on the ground.
  • the platform does not have to support the entire weight of the cable as may be the case for installations of the type consisting of drum winch.
  • each modular mast element 4 consists of uprights 7, at least four in number, interconnected by inclined or horizontal spacers 8 to form a lattice structure whose uprights 7 serve in pairs at the same time. guiding the platform 1A, 1B during its elevation along said poles 16, 17 while some of the struts 8 of the bar type cooperate with the temporary immobilization means 5 carried by the platform 1A, 1B to immobilize this last.
  • the modular mast element 4 intended to bear against the ground differs from the other modular elements 4 in that it is secured at one of its ends to a support plate 15 on the ground.
  • This plate is provided with means for adjusting its attitude to ensure perfect verticality of the mast 16, 17 as and when it is raised.
  • Each mast is in the form of an independent mast with respect to another mast. It is therefore self-stable so that a mast 17 can be disassembled without having to disassemble the mast 16 with which it cooperated.
  • the masthead element 6 is, in a similar manner to the other modular mast elements 4, provided with uprights intended to be assembled by one of their ends to the modular elements 4.
  • the elements 4, 6 of the mast 16, 17 modular are thus nestable through their uprights 7 placed end to end.
  • a necking can be provided to facilitate this nesting.
  • Additional coupling members, such as bolting, between modular mast members 4 may also be provided to enhance the mechanical strength of the assembly.
  • the element 6 masthead may consist of two parallel plates interconnected by spacers intended to constitute the means 23 for hooking the cable on the element 6 masthead. On this structure, there are reported tubes for constituting two amounts for the assembly by interlocking the element 6 masthead to other modular elements 4 of the mast.
  • the plates extend to form an arm terminated by an open hook in the direction of the sky to come to lock under a rod bar type spacer.
  • These arms are laterally offset from one masthead member 6 to another masthead member 6 to allow positioning of two masthead elements on one and the same mast as illustrated in FIG. figure 4 .
  • a roller may further be provided at the masthead to facilitate handling of the mast members.
  • the design of each head element allows a quick and easy positioning of said element.
  • this element 6 of masthead is made symmetrical with respect to the median longitudinal plane of the mast to allow in particular the attachment in parallel of at least two cables 3. This provision is necessary when the same mast is used for the parallel elevation of two platforms which can each have a cable capable of hooking on the element 6 masthead.
  • the permanent attachment of the cable to the element 6 of the masthead makes it possible to avoid any error in the handling of the operator who, at each phase of addition or removal at the masthead of a modular element, simply disengaging the masthead element 6 and then bringing or removing a mast element 4 before repositioning the masthead element 6 without have to touch the hooking of the cable 3 on the element 6 of the masthead.
  • This solution increases the security of the whole.
  • the poles 16, 17 obtained by assembling modular elements of the aforementioned type are independent, self-stable and self-supporting poles.
  • Independent masts are masts of a pair of masts that can be disassembled independently of one another. Each mast has a high rigidity due to its embodiment in the form of a beam unlike the scales of the state of the art.
  • the embodiment of the masts in the form of a tubular element, the beam being hollow and formed from a lattice structure, makes it possible to reduce the weight of the assembly.
  • the masts each comprise at least four uprights 7 interconnected by spacers 8 inclined or horizontal.
  • the uprights 7 of the same mast constitute in pairs a path 11, 12 for guiding a platform 1A, 1B. This results for the same mast the possibility of having two differentiated guide paths 11, 12 allowing the elevation in parallel and asynchronously of two platforms 1A, 1B differentiated over almost the entire height of the same mast 16, 17.
  • a mast made in the form of a tubular element with polygonal section has two faces each serving for guiding and elevating a differentiated platform while at least some of the other faces of the mast held free allow the anchoring the mast to a construction. As the masts rise by adding modular elements 4 of the mast, it is necessary during the addition phase to temporarily immobilize the platform 1A, 1B.
  • the temporary immobilization of the platform 1A, 1B along the masts which is necessary to allow the addition or the removal of a mast element, can be carried out according to different modes.
  • the means 5 of temporary immobilization are constituted by hooks loaded by spring, these hooks forming pawl retracting during the elevation of the platform 1A, 1B and hooking on the elements 4 of mast during a lowering the platform 1A, 1B.
  • These hooks are carried by a platen attached to the base of the platform. This plate can be easily removable or retractable to allow the removal of these elements, especially when used in the form of a suspended platform of the platform of the installation.
  • the hooks retract automatically and the spring brings them back to a position in which they come to lock on the bars 8 forming a spacer between two mast uprights.
  • the hooks are manually retracted between two phases of removal of modular elements 4 mast and are then released to come in a position in which they lock the platform on the masts and thus allow the removal of a mast element.
  • the latter is guided by rolling or sliding contact along the masts 16, 17.
  • the guide means of a platform 1A, 1B along a mast are constituted of rollers 9, preferably grooved, carried by a support 10 removably connectable to the platform 1A, 1B.
  • the rollers 9 with a groove of a support thus roll along two uprights 7 of the mast for forming a path 11 or 12 for guiding the mast.
  • An exemplary embodiment of the guide means is provided to the figure 5 .
  • the same platform comprises two supports 10 equipped with rollers 9, each support 10 cooperating with a path 11 or 12 for guiding a mast 16, 17.
  • the fact that the support 10 roller holder 9 is coupled by simple bolting to the platform allows easy removal of this set again to allow reuse of the platform in the form of suspended platform.
  • each modular mast element 4 consists of at least four uprights, it is thus possible to guide two platforms in parallel and asynchronously on the same mast.
  • the mast elements 4 are couplable to the structure along which they are located. arranged in particular by percussion anchoring.
  • the operator regularly performs an anchoring of the mast elements to the facade of the construction. It can use for this purpose the spacer elements between mast uprights. It can also use anchor bars fixed at one of their ends to the mast and protruding from the mast by the free surface 13 of the mast to come at their other end to attach to the construction. It is not necessarily necessary to anchor each modular mast element to said facade.
  • An anchoring means may be provided every two-three elements.
  • an additional safety device integral in displacement of the platform 1A, 1B, adapted to hold the platform 1A, 1B in the support position on the masts in case of breakage of the cable 3 of the winch 2.
  • the operation of these safety devices is controlled by the tension of the winch cable. In the relaxed state of the cable, the safety device is active while it is inactive in the tight state of the cable.
  • the platform is equipped with at least two safety devices, each safety device being formed of at least one abutment 14, preferably two stops 14, movable controlled by displacement by the tension of the cable 3 of the winch, to move from a resting position on a mast in the relaxed state of the cable to a retracted position in the stretched state of the cable 3 so as to allow the platform to move freely along the mast in the tight state of the cable.
  • each abutment 14 is connected to another abutment 14 by an axis 18.
  • This axis 18 is itself coupled to a stirrup 19 carrying a wheel 20 which delimits with the branches of the stirrup a passage of the cable 3 of the winch.
  • the cable 3 acts in the stretched state on the wheel to cause a displacement of the caliper / stop assembly towards the center of the platform thus preventing the stops 14 to bear on the spacers 8 of the mast bar type.
  • the stops move towards the mast and grip a bar 8 thus ensuring the retention of the platform along the poles.
  • the platform support device as described above, it becomes easy to reach great heights by means of the platform. In addition, the phases of disassembly and repositioning of the masts along the facade are facilitated. Finally, it is possible to cover the entire facade with such platform support devices by limiting the number of poles to be used. Such a construction therefore has a large number of advantages in view of the state of the art.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)
  • Movable Scaffolding (AREA)

Description

La présente invention concerne un dispositif support de plate-forme pour l'élévation de charges ou de personnes le long d'un ouvrage, notamment pour l'exécution de travaux appliqués audit ouvrage, ce dispositif comportant, en combinaison avec une plate-forme, des éléments élévateurs de la plate-forme de type treuil pour régler à volonté le niveau d'élévation de la plate-forme, des éléments modulaires assemblables formant le mât pour atteindre une hauteur désirée, la mise en place de chaque élément de mât s'effectuant à partir de la plate-forme de charge reliable aux mâts d'une part par les éléments élévateurs de type treuil déconnectables à volonté desdits mâts, d'autre part par des moyens d'immobilisation temporaires de la plate-forme par rapport à un élément modulaire de chaque mât pour permettre, à l'état immobilisé de la plate-forme, l'addition ou la suppression en tête des mâts d'au moins un élément modulaire en fonction de la hauteur d'élévation de la plate-forme souhaitée.The present invention relates to a platform support device for the elevation of loads or persons along a structure, particularly for the execution of work applied to said structure, this device comprising, in combination with a platform, lifting elements of the winch type platform to adjust at will the elevation level of the platform, modular elements assemblable forming the mast to reach a desired height, the establishment of each mast element s' carrying out from the load platform reliable to the masts on the one hand by the winch type lifting elements disconnectable at will said masts, on the other hand by means of temporary immobilization of the platform relative to a modular element of each mast to allow, in the immobilized state of the platform, the addition or the deletion at the top of the masts of at least one modular element as a function of the height of levation the desired platform.

Le travail le long de façades de construction de grande hauteur est la plupart du temps effectué à partir d'échafaudages dits suspendus. De tels échafaudages sont constitués d'une plate-forme sur laquelle des treuils sont embarqués, la plate-forme étant suspendue au toit de la construction par l'intermédiaire de câbles fixés à des pièces rapportées sur le toit. Une telle solution offre satisfaction lorsque le toit est aisément accessible et qu'il est possible d'y installer les éléments d'accrochage du câble et les contrepoids nécessaires à un bon fonctionnement de l'ensemble. Dans le cas contraire, les opérateurs sont démunis.The work along high-rise building facades is mostly done from so-called suspended scaffolds. Such scaffolding consists of a platform on which winches are embedded, the platform being suspended from the roof of the construction by cables attached to the inserts on the roof. Such a solution is satisfactory when the roof is easily accessible and it is possible to install the cable hooking elements and counterweights necessary for proper operation of the assembly. Otherwise, the operators are poor.

Une autre solution consisterait à mettre en place une plate-forme élévatrice à partir du sol. Toutefois, toutes les solutions développées à ce jour ne donnent pas satisfaction car elles ne permettent pas d'atteindre de grande hauteur malgré l'utilisation de treuil. Tel est le cas de l'échafaudage décrit dans le brevet FR-A-2.624.173 . Ce document décrit un échafaudage du type comprenant au moins un mât sensiblement vertical en appui d'une part sur une surface sensiblement horizontale et d'autre part sur une surface sensiblement verticale, le mât servant d'ancrage au câble d'un treuil adapté à élever ou à abaisser le long du mât un manchon coulissant appartenant à une console supportant une plate-forme de travail. Outre le fait que le montage des mâts n'est pas abordé dans ce document, on constate que la position des mâts qui s'étendent le long d'un bord longitudinal de la plate-forme constitue une limitation à l'élévation de la plate-forme car ces derniers doivent obligatoirement être raccordés à la façade de l'ouvrage pour éviter tout renversement de l'ensemble de la structure. Ainsi, dans ce document, les mâts sont raccordées par une pièce d'ancrage représentée en 9 aux figures, cette pièce d'ancrage marquant la fin de la progression en hauteur de la plate-forme et rendant impossible l'utilisation d'un tel échafaudage pour un travail à de grandes hauteurs.Another solution would be to set up a lifting platform from the ground. However, all the solutions developed to date are unsatisfactory because they do not achieve great height despite the use of winch. This is the case of the scaffolding described in patent FR-A-2624173 . This document describes a scaffolding of the type comprising at least one substantially vertical mast supported on the one hand on a substantially horizontal surface and on the other hand on a substantially vertical surface, the mast serving to anchor the cable of a winch adapted to raising or lowering along the mast a sliding sleeve belonging to a console supporting a work platform. In addition to the fact that the mounting of the masts is not discussed in this document, it is found that the position of the masts extending along a longitudinal edge of the platform is a limitation to the elevation of the platform -form because these must necessarily be connected to the front of the book to avoid any reversal of the entire structure. Thus, in this document, the masts are connected by an anchor shown in FIGS 9, this anchor marking the end of the progression in height of the platform and making it impossible to use such a device. scaffolding for work at great heights.

L'installation décrite dans le brevet US-A-3.323.616 est constituée d'une plateforme se déplaçant le long de deux mâts formés d'éléments modulaires à emboîtement télescopique nécessitant un montage ou respectivement un démontage simultané des deux mâts. A nouveau, un manchon appartenant à une console supportant une plate-forme de travail coulisse le long du mât rendant impossible tout ancrage du mât à une façade et obligeant à un déplacement synchrone des plates-formes. Comme cette installation ne peut pas comporter de moyens permettant sa fixation à une façade, cette installation est inadaptée au travail à des hauteurs importantes.The installation described in the patent US Patent 3,323,616 consists of a platform moving along two poles formed of modular elements with telescopic interlocking requiring simultaneous assembly or disassembly of the two masts. Again, a sleeve belonging to a console supporting a work platform slides along the mast making it impossible to anchor the mast to a facade and forcing a synchronous movement of the platforms. As this installation can not include means for attachment to a facade, this installation is unsuited to work at high heights.

L'installation décrite par le brevet US-A-3.612.219 est quant à elle constituée de deux échelles et d'une plate-forme. Les échelles sont entretoisées pour permettre le maintien à l'état dressé de ces dernières rendant ainsi impossible le démontage de manière indépendante de l'une des échelles. La plate-forme dont l'élévation s'opère au moyen de treuils portés par la plate-forme n'est pas guidée le long des échelles rendant une telle installation inadaptée à une élévation à de grandes hauteurs.The installation described by the patent US Patent 3,612,219 it consists of two ladders and a platform. The ladders are braced to allow maintenance in the erect state of the latter thus making it impossible to disassemble independently of one of the scales. The platform whose elevation is effected by means of winches carried by the platform is not guided along the ladders making such an installation unsuitable for elevation at great heights.

Le brevet FR-A-625.646 décrit un échafaudage dont la plate-forme est portée par des mâts indépendants pouvant être fixés à une façade au moyen de contreforts. Dans ce cas, la plateforme est formée à nouveau d'une console et de deux manchons coulissant chacun le long d'un mât comme l'illustre la figure 1 de ce brevet ou le passage colonne 2 - lignes 19 à 26 de la description. Lesdits contreforts constituent donc un obstacle à la descente de la plate-forme qui ne pourra être totalement descendue que lors du démontage des mâts et enlèvement des contreforts. Cette solution empêche donc un libre déplacement en monte et baisse de la plate-forme le long des mâts. Par ailleurs, la liaison plate-forme/mât à l'aide d'un manchon coulissant oblige, dans le cas d'une construction à trois mâts, à un déplacement synchrone de la totalité de la plate-forme.The patent FR-A-625 646 describes a scaffolding whose platform is supported by independent masts that can be attached to a façade by means of buttresses. In this case, the platform is formed again of a console and two sleeves each sliding along a mast as shown in FIG. figure 1 of this patent or the passage column 2 - lines 19 to 26 of the description. Said buttresses therefore constitute an obstacle to the descent of the platform which can not be fully lowered only during dismantling of the masts and removal of the buttresses. This solution therefore prevents free movement in up and down the platform along the masts. Furthermore, the platform / mast connection using a sliding sleeve requires, in the case of a three mast construction, a synchronous displacement of the entire platform.

Le brevet EP 0612899 A1 décrit quant à lui un plateau fixé sur deux échelles au moyen de crochets pivotants s'accrochant sur les barreaux horizontaux desdites échelles. Ce dispositif permet un déplacement en monte et baisse de la plate-forme le long des mâts, ce déplacement étant commandé au moyen d'un treuil depuis l'intérieur de la plateforme ou depuis le sol. Cependant, il n'est pas décrit ici de système de guidage de la plateforme le long des montants des échelles. Pendant un déplacement vertical, la plateforme est aussi rendue libre en déplacement horizontal ce qui rend cette installation dangereuse et inadaptée au travail à de grandes hauteurs. Cet document divulgue toutes les caractéristiques techniques du préambule de la revendication 1. Ainsi les documents discutés ci-dessus ne décrivent pas d'échafaudage utilisable à des hauteurs importantes, dont la plateforme pourrait être déplacée verticalement sur toute la hauteur des montants sans nuire à la sécurité de l'ensemble. De plus, aucun de ces documents ne décrit un dispositif permettant le déplacement asynchrone de deux plateaux le long de deux surfaces de guidage d'un même mât.The patent EP 0612899 A1 describes a plateau fixed on two scales by means of pivoting hooks clinging to the horizontal bars of said ladders. This device allows a movement up and down the platform along the masts, this movement being controlled by means of a winch from inside the platform or from the ground. However, there is no description here platform guidance system along the amounts of ladders. During a vertical movement, the platform is also made free in horizontal displacement which makes this installation dangerous and unsuited to work at great heights. This document discloses all the technical features of the preamble of claim 1. Thus the documents discussed above do not describe scaffolding usable at significant heights, the platform could be moved vertically over the entire height of the amounts without harming the security of the whole. In addition, none of these documents describes a device for the asynchronous displacement of two trays along two guide surfaces of the same mast.

Un but de la présente invention est donc de proposer un dispositif support de plate-forme pour l'élévation de charges ou de personnes le long d'un ouvrage dont la conception permet d'atteindre des hauteurs quelconques et en particulier de grandes hauteurs.An object of the present invention is therefore to provide a platform support device for the elevation of loads or people along a structure whose design allows to reach any heights and in particular large heights.

Un autre but de la présente invention est de proposer un dispositif du type précité dont la conception permet d'optimiser les temps de montage et de démontage des mâts dans le cas de façades de largeur importante.
Un autre but de la présente invention est de proposer un dispositif du type précité dont la conception permet de couvrir toute une façade en limitant le nombre de mâts devant être utilisés.
Un autre but de la présente invention est de proposer un dispositif du type précité dont la conception permet de réutiliser l'essentiel des éléments constitutifs du dispositif dans un montage traditionnel de type plate-forme suspendue.
A cet effet, l'invention a pour objet un dispositif support de plate-forme pour l'élévation de charges ou de personnes selon la revendication 1. Grâce à la disposition relative de la plate-forme et des mâts, les mâts étant positionnés aux extrémités de la plate-forme qui est logée ainsi dans l'espace laissé libre entre lesdits mâts, plus aucune contrainte en terme d'élévation de la plate-forme en raison de l'ancrage des mâts à l'ouvrage n'est constatée.Another object of the present invention is to provide a device of the aforementioned type whose design makes it possible to optimize the assembly and disassembly times of the masts in the case of façades of large width.
Another object of the present invention is to provide a device of the aforementioned type whose design can cover an entire facade by limiting the number of masts to be used.
Another object of the present invention is to provide a device of the aforementioned type whose design allows to reuse most of the constituent elements of the device in a traditional suspended platform type mounting.
For this purpose, the invention relates to a platform support device for lifting loads or persons according to claim 1. Thanks to the relative arrangement of the platform and the masts, the masts being positioned at the ends of the platform which is thus housed in the space left free between said masts, plus any constraint in terms of elevation of the platform form because of the anchoring of the masts to the work is noticeable.

Par ailleurs, un dispositif selon cette invention permet d'utiliser un même mât comme élément de guidage et de support à l'état suspendu de deux plates-formes déplaçables de manière synchrone ou asynchrone sur la totalité de la hauteur du mât. On limite ainsi le nombre d'éléments modulaires nécessaires à la construction des mâts, caractéristique particulièrement importante lorsque les mâts peuvent atteindre plusieurs dizaines de mètres. En outre, lorsque le dispositif doit être déplacé latéralement le long d'une façade, il suffit de démonter un seul mât pour obtenir, par coopération avec le mât resté en place, un nouveau chemin d'élévation à l'intérieur duquel est placée la plate-forme. Il en résulte un gain en temps de montage et de démontage extrêmement important.
L'invention sera bien comprise à la lecture de la description suivante d'exemples de réalisation, en référence aux dessins annexés dans lesquels :

  • la figure 1 représente une vue d'ensemble d'un dispositif conforme à l'invention ;
  • la figure 2 représente une vue en perspective d'un élément modulaire de mât ;
  • la figure 3 représente une vue d'ensemble d'un élément de tête de mât assemblé à un élément modulaire de mât ;
  • la figure 4 représente une vue d'ensemble des moyens de mise en place de deux éléments de tête de mât sur un même élément modulaire de mât;
  • la figure 5 représente une vue en perspective des moyens de guidage de la plate-forme du mât ;
  • la figure 6 représente une vue d'ensemble des moyens d'immobilisation temporaire de la plate-forme le long du mât dans une position assurant l'immobilisation de la plateforme ;
  • la figure 7 représente une vue d'ensemble des moyens d'immobilisation temporaire de la plateforme le long du mât dans une position permettant le déplacement de la plateforme ;
  • la figure 8 représente une vue d'ensemble de deux dispositifs positionnés le long d'une façade ;
  • la figure 9 représente une vue partielle de deux plateformes utilisant les deux surfaces de guidage différenciées d'un même mât pour assurer leur guidage ;
  • la figure 10 représente une vue d'ensemble du système de guidage d'une plateforme le long d'un mât ;
  • la figure 11 représente une vue de dessus du système de guidage d'une plateforme le long d'un mât ;
  • la figure 12 représente une vue d'ensemble du système de sécurité asservi à la tension du câble dans une position tendue dudit câble permettant un déplacement vertical de la plateforme et
  • la figure 13 représente une vue d'ensemble du système de sécurité asservi à la tension du câble dans une position relâchée dudit câble, assurant l'immobilisation de la plateforme.
In addition, a device according to this invention makes it possible to use the same mast as a guiding and support element in the suspended state of two platforms that can be moved synchronously or asynchronously over the entire height of the mast. This limits the number of modular elements required for the construction of the masts, a particularly important feature when the masts can reach several tens of meters. In addition, when the device must be moved laterally along a facade, it is sufficient to disassemble a single mast to obtain, in cooperation with the mast remained in place, a new elevation path inside which is placed the platform. This results in a gain in time of assembly and disassembly extremely important.
The invention will be better understood on reading the following description of exemplary embodiments, with reference to the appended drawings in which:
  • the figure 1 represents an overview of a device according to the invention;
  • the figure 2 is a perspective view of a modular mast element;
  • the figure 3 represents an overview of a masthead element assembled to a modular mast element;
  • the figure 4 represents an overview of the means for placing two mast head elements on the same modular mast element;
  • the figure 5 represents a perspective view of the guide means of the platform of the mast;
  • the figure 6 represents an overview of the temporary immobilization means of the platform along the mast in a position ensuring the immobilization of the platform;
  • the figure 7 represents an overview of the temporary immobilization means of the platform along the mast in a position allowing the displacement of the platform;
  • the figure 8 represents an overview of two devices positioned along a facade;
  • the figure 9 represents a partial view of two platforms using the two differentiated guide surfaces of the same mast to ensure their guidance;
  • the figure 10 represents an overview of the system for guiding a platform along a mast;
  • the figure 11 represents a top view of the guidance system of a platform along a mast;
  • the figure 12 represents an overview of the safety system enslaved to the tension of the cable in an extended position of said cable allowing a vertical displacement of the platform and
  • the figure 13 represents an overview of the security system slaved to the tension of the cable in a relaxed position of said cable, ensuring the immobilization of the platform.

Comme mentionné ci-dessus, le dispositif support de plate-forme 1A, 1B, objet de l'invention, doit permettre le levage de personnes et/ou de charges à de grandes hauteurs généralement de l'ordre de 50 mètres ou plus afin de faciliter notamment les travaux de rénovation des façades d'immeuble. Ce dispositif support de plate-forme doit pouvoir être mis en place à partir du sol sans avoir à utiliser le toit de la construction. Ce dispositif support de plate-forme comporte, comme mentionné ci-dessus, en combinaison avec une plate-forme 1A ou 1B, des éléments 2, 3 élévateurs de la plate-forme de type treuil pour régler à volonté le niveau d'élévation de la plate-forme 1A, 1B ainsi que des éléments 4, 6 modulaires assemblables formant mât pour atteindre une hauteur désirée. L'intérêt d'un tel dispositif support de plate-forme 1A, 1B est que la mise en place de chaque élément de mât 4 s'effectue à partir de la plate-forme 1A, 1B de charge reliable aux mâts d'une part par les éléments 2, 3 élévateurs de type treuil déconnectables à volonté desdits mâts, d'autre part par des moyens 5 d'immobilisation temporaires de la plate-forme 1A, 1B par rapport à un élément 4 modulaire de chaque mât de type crochet. Ainsi, à l'état immobilisé de la plate-forme 1A, 1B par les moyens temporaires d'immobilisation 5, il est possible de procéder, en tête de mât, à l'addition ou à la suppression d'au moins un élément 4, 6 modulaire en fonction de la hauteur d'élévation de la plate-forme 1A, 1B souhaitée. Lorsque l'élément modulaire de mât 4 a été rapporté en tête de mât et que l'élément élévateur 2, 3 a été reconnecté au mât, on actionne à nouveau le treuil 2 pour permettre l'élévation de la plate-forme 1A, 1B jusqu'à une nouvelle immobilisation temporaire de la plate-forme le long des mâts puis à nouveau, l'addition d'un nouvel élément modulaire 4 pour chaque mât. L'opération peut ainsi être répétée jusqu'à atteindre la hauteur désirée. La plate-forme peut ainsi être élevée à une hauteur quelconque grâce au fait que la plate-forme 1A, 1B est placée entre les deux mâts 16, 17 modulaires formant chemin d'élévation. Ainsi, l'ancrage des mâts 16, 17 à la façade de l'ouvrage n'empêche pas une telle élévation de la plate-forme. En outre, l'installation étant destinée à atteindre de grandes hauteurs, le nombre d'éléments modulaires pour former chaque mât est relativement important. Il est donc fondamental d'optimiser le nombre de pièces devant être stockées pour la réalisation des mâts. Grâce à la disposition des mâts de part et d'autre des extrémités de la plate-forme qui est généralement de forme rectangulaire, les mâts s'étendant alors au-delà des bords transversaux de ladite plate-forme, il est possible, avec un même mât, d'autoriser l'élévation en parallèle de manière synchrone ou asynchrone de deux plates-formes comme l'illustre la figure 9. Il est également possible, après décalage latéral d'un mât, de recréer un chemin d'élévation à l'aide d'un seul mât par coopération avec le mât resté en place. Enfin, ce dispositif support de plate-forme 1A, 1B présente l'avantage de permettre la réutilisation de l'essentiel de ses éléments pour la réalisation d'une plate-forme suspendue. Tous ces avantages seront développés plus en détail ci-après à partir de la description détaillée du dispositif support de plate-forme.
Comme mentionné ci-dessus, le niveau d'élévation de la plate-forme 1A, 1B est réglé à volonté par l'intermédiaire d'éléments élévateurs 2, 3. Ces éléments élévateurs, de type treuil, sont constitués d'au moins un corps 2 de treuil embarqué sur la plate-forme 1A, 1B et d'un câble 3 s'étendant entre mât et plate-forme 1A, 1B. Le fait d'embarquer le corps 2 de treuil sur la plate-forme 1A, 1B permet, lors d'un démontage de la plate-forme, de disposer d'une plate-forme et d'un treuil prêt à l'emploi pour la réalisation d'une plate-forme suspendue. Le corps 2 de treuil est du type à passage de câble continu de longueur quelconque pour éviter à la plate-forme 1A, 1B, dans certaines conditions, de supporter la totalité du poids du câble 3. En effet, et contrairement à l'état de la technique, le treuil n'est pas un treuil à tambour dans le cas duquel le câble est enroulé autour du corps de treuil et se déroule ou respectivement s'enroule au fur et à mesure de l'élévation de la plate-forme. Un exemple d'un tel treuil à passage de câble continu de longueur quelconque est notamment décrit dans le brevet FR-A-2.618.421 . Ces treuils sont généralement constitués d'une poulie munie d'une gorge d'adhérence et d'une came destinée à bloquer le câble à l'intérieur de ladite gorge d'adhérence. Le câble est apte à s'étendre au-delà de cette zone de pincement et tend ainsi à partir du treuil comme l'illustre la figure 1 pour venir reposer au sol. Ainsi, dans le cas de grande longueur de câble, la plate-forme n'a pas à supporter la totalité du poids du câble comme cela peut être le cas pour des installations du type constitué de treuil à tambour. Cette solution s'avère donc particulièrement intéressante dans le cas d'un dispositif support de plate-forme dont la plate-forme est destinée à atteindre une grande hauteur.
Le câble 3 est quant à lui relié au mât par un élément modulaire de mât constituant systématiquement l'élément 6 de tête de mât. Cet élément 6 de tête de mât est plus particulièrement représenté aux figures 3 et 4. Dans l'exemple représenté, chaque élément 4 modulaire de mât est constitué de montants 7, au nombre au moins égal à quatre, reliés entre eux par des entretoises 8 inclinées ou horizontales pour former une structure en treillis dont les montants 7 servent par paire au guidage de la plate-forme 1A, 1B lors de son élévation le long desdits mâts 16, 17 tandis que certaines des entretoises 8 de type barreau coopèrent avec les moyens 5 d'immobilisation temporaire portés par la plate-forme 1A, 1B pour immobiliser cette dernière. L'élément 4 modulaire de mât destiné à venir en appui au sol se différencie des autres éléments 4 modulaires par le fait qu'il est solidarisé à une de ses extrémités à une platine 15 d'appui au sol. Cette platine est munie de moyens de réglage de son assiette pour garantir une parfaite verticalité du mât 16, 17 au fur et à mesure de son élévation. Chaque mât est réalisé sous forme d'un mât indépendant par rapport à un autre mât. Il est donc auto stable de telle sorte qu'un mât 17 peut être démonté sans avoir à démonter le mât 16 voisin avec lequel il coopérait.As mentioned above, the platform support device 1A, 1B, object of the invention, must allow the lifting of people and / or loads at great heights generally of the order of 50 meters or more in order to to facilitate, in particular, renovation work on building facades. This platform support device must be able to be set up from the ground without having to use the roof of the construction. This platform support device comprises, as mentioned above, in combination with a platform 1A or 1B, elements 2, 3 elevators of the winch type platform to adjust at will the level of elevation of the platform 1A, 1B as well as modular elements 4, 6 assemblable forming mast to reach a desired height. The advantage of such a platform support device 1A, 1B is that the implementation of each mast element 4 is made from the platform 1A, 1B load connectable to the masts on the one hand by the elements 2, 3 hoist-type lifts disconnectable at will from said masts, on the other hand by temporary immobilization means 5 of the platform 1A, 1B relative to a modular element 4 of each hook-type mast. Thus, in the immobilized state of the platform 1A, 1B by the temporary immobilization means 5, it is possible to proceed, at the masthead, to the addition or the suppression of at least one element 4 , 6 modular depending on the elevation height of the platform 1A, 1B desired. When the modular mast element 4 has been attached to the masthead and the lifting element 2, 3 has been reconnected to the mast, the winch 2 is again actuated to allow the platform 1A, 1B to be raised. until a new temporary immobilization of the platform along the masts and then again, the addition of a new modular element 4 for each mast. The operation can be repeated until the desired height is reached. The platform can thus be raised to any height by virtue of the fact that the platform 1A, 1B is placed between the two modular masts 16, 17 forming an elevation path. Thus, the anchoring of the masts 16, 17 to the front of the structure does not prevent such an elevation of the platform. In addition, the installation is intended to achieve great heights, the number of modular elements to form each mast is relatively important. It is therefore essential to optimize the number of parts to be stored for the construction of the masts. Thanks to the arrangement of the masts on either side of the ends of the platform which is generally rectangular in shape, the masts then extending beyond the transverse edges of said platform, it is possible, with a same mast, to allow synchronous or asynchronous parallel elevation of two platforms as illustrated figure 9 . It is also possible, after lateral shift of a mast, to recreate an elevation path using a single mast in cooperation with the mast remained in place. Finally, this platform support device 1A, 1B has the advantage of allowing the reuse of most of its elements for the production of a suspended platform. All of these advantages will be developed in more detail below from the detailed description of the platform support device.
As mentioned above, the level of elevation of the platform 1A, 1B is adjusted at will by means of lifting elements 2, 3. These lifting elements, winch type, consist of at least one winch body 2 embedded on the platform 1A, 1B and a cable 3 extending between mast and platform 1A, 1B. The fact of loading the body 2 of winch on the platform 1A, 1B makes it possible, during disassembly of the platform, to have a platform and a winch ready for use for the realization of a suspended platform. The winch body 2 is of the continuous cable passage type of any length to prevent the platform 1A, 1B, under certain conditions, to support the entire weight of the cable 3. Indeed, and contrary to the state of the technique, the winch is not a drum winch in which case the cable is wrapped around the winch body and unrolls or wraps as the platform is raised. An example of such a winch with continuous cable passage of any length is described in particular in the patent FR-A-2618421 . These winches generally consist of a pulley provided with a grip groove and a cam for locking the cable inside said grip groove. The cable is able to extend beyond this pinching zone and thus tends from the winch as illustrated by FIG. figure 1 to come to rest on the ground. Thus, in the case of long cable length, the platform does not have to support the entire weight of the cable as may be the case for installations of the type consisting of drum winch. This solution is therefore particularly interesting in the case of a platform support device whose platform is intended to reach a great height.
The cable 3 is connected to the mast by a modular mast element systematically constituting the element 6 masthead. This element 6 of masthead is more particularly represented in Figures 3 and 4 . In the example shown, each modular mast element 4 consists of uprights 7, at least four in number, interconnected by inclined or horizontal spacers 8 to form a lattice structure whose uprights 7 serve in pairs at the same time. guiding the platform 1A, 1B during its elevation along said poles 16, 17 while some of the struts 8 of the bar type cooperate with the temporary immobilization means 5 carried by the platform 1A, 1B to immobilize this last. The modular mast element 4 intended to bear against the ground differs from the other modular elements 4 in that it is secured at one of its ends to a support plate 15 on the ground. This plate is provided with means for adjusting its attitude to ensure perfect verticality of the mast 16, 17 as and when it is raised. Each mast is in the form of an independent mast with respect to another mast. It is therefore self-stable so that a mast 17 can be disassembled without having to disassemble the mast 16 with which it cooperated.

L'élément 6 de tête de mât est, de manière analogue aux autres éléments 4 modulaires de mât, pourvu de montants destinés à s'assembler par une de leurs extrémités aux éléments 4 modulaires. Les éléments 4, 6 de mât 16, 17 modulaire sont ainsi emboîtables par l'intermédiaire de leurs montants 7 placés bout à bout. Un rétreint peut être prévu pour faciliter cet emboîtement. Des organes d'accouplement supplémentaires, tel qu'un boulonnage, entre éléments modulaires 4 de mât peuvent également être prévus pour renforcer la résistance mécanique de l'ensemble. Dans les exemples représentés, l'élément 6 de tête de mât peut être constitué de deux plaques parallèles reliées entre elles par des entretoises destinées à constituer les moyens 23 d'accroche du câble sur l'élément 6 de tête de mât. Sur cette structure, sont rapportés des tubes destinés à constituer deux montants servant à l'assemblage par emboîtement de l'élément 6 de tête de mât aux autres éléments 4 modulaires du mât. Les plaques se prolongent pour former un bras terminé par un crochet ouvert en direction du ciel pour venir se verrouiller sous une entretoise de type barreau du mât. Ces bras sont décalés latéralement d'un élément 6 de tête de mât à un autre élément 6 de tête de mât pour permettre le positionnement de deux éléments de tête de mât sur un même mât comme l'illustre la figure 4. Un rouleau peut en outre être prévu au niveau de la tête de mât pour faciliter la manipulation des éléments de mât. La conception de chaque élément de tête permet un positionnement rapide et aisé dudit élément.
Dans un autre mode de réalisation de l'invention, cet élément 6 de tête de mât est réalisé symétrique par rapport au plan longitudinal médian du mât pour permettre notamment l'accrochage en parallèle d'au moins deux câbles 3. Cette disposition est nécessaire lorsqu'un même mât est utilisé pour l'élévation en parallèle de deux plates-formes qui peuvent ainsi chacune présenter un câble apte à s'accrocher sur l'élément 6 de tête de mât. L'accrochage permanent du câble à l'élément 6 de tête de mât permet d'éviter toute erreur de manipulation de l'opérateur qui, à chaque phase d'addition ou de suppression en tête de mât d'un élément modulaire, a simplement à désemboîter l'élément 6 de tête de mât puis à rapporter ou à enlever un élément 4 de mât avant de repositionner cet élément 6 de tête de mât sans avoir à toucher à l'accrochage du câble 3 sur l'élément 6 de tête de mât. Cette solution accroît la sécurité de l'ensemble.
Les mâts 16, 17 obtenus par assemblage d'éléments modulaires du type précité constituent des mâts indépendants, auto-stables et autoporteurs. Par mâts indépendants, on entend des mâts d'une paire de mâts qui peuvent être démontés indépendamment l'un de l'autre. Chaque mât présente une rigidité importante du fait de sa réalisation sous forme d'une poutre contrairement aux échelles de l'état de la technique. La réalisation des mâts sous forme d'élément tubulaire, la poutre étant creuse et formée à partir d'une structure en treillis, permet de réduire le poids de l'ensemble. Les mâts comportent chacun au moins quatre montants 7 reliés entre eux par des entretoises 8 inclinées ou horizontales. Les montants 7 d'un même mât constituent par paire un chemin 11, 12 de guidage d'une plate-forme 1A, 1B. Il en résulte pour un même mât la possibilité de disposer de deux chemins de guidage 11, 12 différenciés autorisant l'élévation en parallèle et de manière asynchrone de deux plates-formes 1A, 1B différenciées sur la quasi totalité de la hauteur d'un même mât 16, 17. Ces surfaces ou chemin 11, 12 de guidage sont agencés sur le mât pour ménager le long d'une génératrice du mât une surface 13 libre permettant l'ancrage du mât à la façade de la construction par des moyens de liaison appropriés sans nuire au déplacement en monte et baisse desdites plates-formes 1A, 1B. La surface 13 libre du mât s'étend sur le mât entre les deux chemins ou surfaces 16, 17 de guidage et séparer ces derniers. En résumé, un mât réalisé sous forme d'un élément tubulaire à section polygonale présente deux faces servant chacune au guidage et à l'élévation d'une plate-forme différenciée tandis qu'au moins certaines des autres faces du mât maintenues libres permettent l'ancrage du mât à une construction.
Au fur et à mesure de l'élévation des mâts par addition d'éléments modulaires 4 de mât, il est nécessaire pendant, la phase d'ajout d'immobiliser temporairement la plate-forme 1A, 1B. L'immobilisation temporaire de la plate-forme 1A, 1B le long des mâts, qui est nécessaire pour permettre l'addition ou la suppression d'un élément de mât, peut être réalisée suivant différents modes. Dans la figure 6, les moyens 5 d'immobilisation temporaire sont constitués par des crochets chargés par ressort, ces crochets formant cliquet s'escamotant lors de l'élévation de la plate-forme 1A, 1B et se crochetant sur les éléments 4 de mât lors d'un abaissement de la plate-forme 1A, 1B. Ces crochets sont portés par une platine rapportée au niveau de la base de la plate-forme. Cette platine peut être aisément démontable ou escamotable pour permettre la suppression de ces éléments, en particulier lors d'une utilisation sous forme d'une plate-forme suspendue de la plate-forme de l'installation. Lors des phases d'élévation de la plate-forme le long des mâts, les crochets s'escamotent automatiquement et le ressort les ramène dans une position dans laquelle ils viennent se verrouiller sur les barreaux 8 formant entretoise entre deux montants de mât. Pendant les phases de suppression d'élément modulaire de mât, ces phases étant mises en oeuvre notamment lors d'un démontage du dispositif, les crochets sont escamotés manuellement entre deux phases de suppression d'éléments modulaires 4 de mât et sont ensuite relâchés pour venir dans une position dans laquelle ils verrouillent la plate-forme sur les mâts et permettent ainsi la suppression d'un élément de mât.
Pendant toutes les phases de fonctionnement de la plate-forme, cette dernière est guidée à contact roulant ou glissant le long des mâts 16, 17. Les moyens de guidage d'une plate-forme 1A, 1B le long d'un mât sont constitués de galets 9, de préférence à gorge, portés par un support 10 couplable de manière démontable à la plate-forme 1A, 1B. Les galets 9 à gorge d'un support roulent ainsi le long de deux montants 7 du mât servant à former un chemin 11 ou 12 de guidage du mât. Un exemple de réalisation des moyens de guidage est fourni à la figure 5.
Bien évidemment, une même plate-forme comporte deux supports 10 équipés de galets 9, chaque support 10 coopérant avec un chemin 11 ou 12 de guidage d'un mât 16, 17. Le fait que le support 10 porte-galets 9 soit couplable par simple boulonnage à la plate-forme permet un démontage aisé de cet ensemble à nouveau pour permettre une réutilisation de la plate-forme sous forme de plate-forme suspendue.The masthead element 6 is, in a similar manner to the other modular mast elements 4, provided with uprights intended to be assembled by one of their ends to the modular elements 4. The elements 4, 6 of the mast 16, 17 modular are thus nestable through their uprights 7 placed end to end. A necking can be provided to facilitate this nesting. Additional coupling members, such as bolting, between modular mast members 4 may also be provided to enhance the mechanical strength of the assembly. In the examples shown, the element 6 masthead may consist of two parallel plates interconnected by spacers intended to constitute the means 23 for hooking the cable on the element 6 masthead. On this structure, there are reported tubes for constituting two amounts for the assembly by interlocking the element 6 masthead to other modular elements 4 of the mast. The plates extend to form an arm terminated by an open hook in the direction of the sky to come to lock under a rod bar type spacer. These arms are laterally offset from one masthead member 6 to another masthead member 6 to allow positioning of two masthead elements on one and the same mast as illustrated in FIG. figure 4 . A roller may further be provided at the masthead to facilitate handling of the mast members. The design of each head element allows a quick and easy positioning of said element.
In another embodiment of the invention, this element 6 of masthead is made symmetrical with respect to the median longitudinal plane of the mast to allow in particular the attachment in parallel of at least two cables 3. This provision is necessary when the same mast is used for the parallel elevation of two platforms which can each have a cable capable of hooking on the element 6 masthead. The permanent attachment of the cable to the element 6 of the masthead makes it possible to avoid any error in the handling of the operator who, at each phase of addition or removal at the masthead of a modular element, simply disengaging the masthead element 6 and then bringing or removing a mast element 4 before repositioning the masthead element 6 without have to touch the hooking of the cable 3 on the element 6 of the masthead. This solution increases the security of the whole.
The poles 16, 17 obtained by assembling modular elements of the aforementioned type are independent, self-stable and self-supporting poles. Independent masts are masts of a pair of masts that can be disassembled independently of one another. Each mast has a high rigidity due to its embodiment in the form of a beam unlike the scales of the state of the art. The embodiment of the masts in the form of a tubular element, the beam being hollow and formed from a lattice structure, makes it possible to reduce the weight of the assembly. The masts each comprise at least four uprights 7 interconnected by spacers 8 inclined or horizontal. The uprights 7 of the same mast constitute in pairs a path 11, 12 for guiding a platform 1A, 1B. This results for the same mast the possibility of having two differentiated guide paths 11, 12 allowing the elevation in parallel and asynchronously of two platforms 1A, 1B differentiated over almost the entire height of the same mast 16, 17. These guide surfaces or path 11, 12 are arranged on the mast to provide along a generatrix of the mast a free surface 13 for anchoring the mast to the facade of the construction by connecting means appropriate without harming the upward and downward movement of said platforms 1A, 1B. The free surface 13 of the mast extends on the mast between the two paths or surfaces 16, 17 guide and separate them. In summary, a mast made in the form of a tubular element with polygonal section has two faces each serving for guiding and elevating a differentiated platform while at least some of the other faces of the mast held free allow the anchoring the mast to a construction.
As the masts rise by adding modular elements 4 of the mast, it is necessary during the addition phase to temporarily immobilize the platform 1A, 1B. The temporary immobilization of the platform 1A, 1B along the masts, which is necessary to allow the addition or the removal of a mast element, can be carried out according to different modes. In the figure 6 , the means 5 of temporary immobilization are constituted by hooks loaded by spring, these hooks forming pawl retracting during the elevation of the platform 1A, 1B and hooking on the elements 4 of mast during a lowering the platform 1A, 1B. These hooks are carried by a platen attached to the base of the platform. This plate can be easily removable or retractable to allow the removal of these elements, especially when used in the form of a suspended platform of the platform of the installation. During the phases of elevation of the platform along the masts, the hooks retract automatically and the spring brings them back to a position in which they come to lock on the bars 8 forming a spacer between two mast uprights. During the modular mast element removal phases, these phases being implemented in particular during disassembly of the device, the hooks are manually retracted between two phases of removal of modular elements 4 mast and are then released to come in a position in which they lock the platform on the masts and thus allow the removal of a mast element.
During all the phases of operation of the platform, the latter is guided by rolling or sliding contact along the masts 16, 17. The guide means of a platform 1A, 1B along a mast are constituted of rollers 9, preferably grooved, carried by a support 10 removably connectable to the platform 1A, 1B. The rollers 9 with a groove of a support thus roll along two uprights 7 of the mast for forming a path 11 or 12 for guiding the mast. An exemplary embodiment of the guide means is provided to the figure 5 .
Of course, the same platform comprises two supports 10 equipped with rollers 9, each support 10 cooperating with a path 11 or 12 for guiding a mast 16, 17. The fact that the support 10 roller holder 9 is coupled by simple bolting to the platform allows easy removal of this set again to allow reuse of the platform in the form of suspended platform.

Dans les exemples représentés, deux paires de galets sont prévues à chacune des extrémités de la plate-forme, chaque paire de galets coopérant avec un montant du mât. Grâce au fait que chaque élément 4 modulaire de mât est constitué d'au moins quatre montants, il est ainsi possible de guider en parallèle et de manière asynchrone deux plates-formes sur un même mât.In the examples shown, two pairs of rollers are provided at each end of the platform, each pair of rollers cooperating with a post of the mast. Due to the fact that each modular mast element 4 consists of at least four uprights, it is thus possible to guide two platforms in parallel and asynchronously on the same mast.

Enfin, pour des raisons de sécurité et pour éviter tout renversement du dispositif support de plate-forme, en particulier lors d'une élévation à des hauteurs importantes des mâts, les éléments 4 de mât sont couplables à l'ouvrage le long duquel ils sont disposés notamment par ancrage par percussion. Ainsi, au fur et à mesure de l'élévation, l'opérateur procède régulièrement à un ancrage des éléments de mât à la façade de la construction. Il peut utiliser pour ce faire les éléments d'entretoise entre montants de mât. Il peut également utiliser des barres d'ancrage fixées à une de leurs extrémités au mât et faisant saillie du mât par la surface 13 libre du mât pour venir par leur autre extrémité se fixer à la construction. Il n'est pas forcément nécessaire d'ancrer chaque élément modulaire de mât à ladite façade. Un moyen d'ancrage peut être prévu tous les deux-trois éléments.Finally, for reasons of safety and to prevent any overturning of the platform support device, in particular when the mast is raised to high heights, the mast elements 4 are couplable to the structure along which they are located. arranged in particular by percussion anchoring. Thus, as and when elevation, the operator regularly performs an anchoring of the mast elements to the facade of the construction. It can use for this purpose the spacer elements between mast uprights. It can also use anchor bars fixed at one of their ends to the mast and protruding from the mast by the free surface 13 of the mast to come at their other end to attach to the construction. It is not necessarily necessary to anchor each modular mast element to said facade. An anchoring means may be provided every two-three elements.

Enfin, il peut être prévu un dispositif de sécurité supplémentaire, solidaire en déplacement de la plate-forme 1A, 1B, apte à retenir la plate-forme 1A, 1B en position d'appui sur les mâts en cas de rupture du câble 3 du treuil 2. Le fonctionnement de ces dispositifs de sécurité est asservi à la tension du câble de treuil. A l'état relâché du câble, le dispositif de sécurité est actif tandis qu'il est inactif à l'état tendu du câble.Finally, it can be provided an additional safety device, integral in displacement of the platform 1A, 1B, adapted to hold the platform 1A, 1B in the support position on the masts in case of breakage of the cable 3 of the winch 2. The operation of these safety devices is controlled by the tension of the winch cable. In the relaxed state of the cable, the safety device is active while it is inactive in the tight state of the cable.

Dans les exemples représentés, la plate-forme est équipée d'au moins deux dispositifs de sécurité, chaque dispositif de sécurité étant formé d'au moins une butée 14, de préférence deux butées 14, mobiles commandées en déplacement par la tension du câble 3 du treuil, pour passer d'une position en appui sur un mât à l'état relâché du câble à une position rétractée à l'état tendu du câble 3 de manière à permettre à la plate-forme de se déplacer librement le long du mât à l'état tendu du câble.In the examples shown, the platform is equipped with at least two safety devices, each safety device being formed of at least one abutment 14, preferably two stops 14, movable controlled by displacement by the tension of the cable 3 of the winch, to move from a resting position on a mast in the relaxed state of the cable to a retracted position in the stretched state of the cable 3 so as to allow the platform to move freely along the mast in the tight state of the cable.

Ainsi, comme l'illustrent les figures 12 et 13, chaque butée 14 est reliée à une autre butée 14 par un axe 18. Cet axe 18 est lui-même couplé à un étrier 19 portant une roulette 20 qui délimite avec les branches de l'étrier un passage du câble 3 du treuil. Le câble 3 agit à l'état tendu sur la roulette pour provoquer un déplacement de l'ensemble étrier/butée en direction du centre de la plate-forme empêchant ainsi les butées 14 de prendre appui sur les entretoises 8 de type barreau du mât. A l'inverse, à l'état relâché du câble 3, les butées se déplacent en direction du mât et enserrent un barreau 8 assurant ainsi la retenue de la plate-forme le long des mâts.Thus, as illustrated by Figures 12 and 13 each abutment 14 is connected to another abutment 14 by an axis 18. This axis 18 is itself coupled to a stirrup 19 carrying a wheel 20 which delimits with the branches of the stirrup a passage of the cable 3 of the winch. The cable 3 acts in the stretched state on the wheel to cause a displacement of the caliper / stop assembly towards the center of the platform thus preventing the stops 14 to bear on the spacers 8 of the mast bar type. Conversely, in the relaxed state of the cable 3, the stops move towards the mast and grip a bar 8 thus ensuring the retention of the platform along the poles.

Grâce au dispositif support de plate-forme tel que décrit ci-dessus, il devient aisé d'atteindre de grandes hauteurs au moyen de la plate-forme. Par ailleurs, les phases de démontage et de repositionnement des mâts le long de la façade sont facilitées. Enfin, il est possible de couvrir la totalité d'une façade avec de tels dispositifs support de plate-forme en limitant le nombre de mâts devant être utilisés. Une telle construction présente donc un grand nombre d'avantages au regard de l'état de la technique.Thanks to the platform support device as described above, it becomes easy to reach great heights by means of the platform. In addition, the phases of disassembly and repositioning of the masts along the facade are facilitated. Finally, it is possible to cover the entire facade with such platform support devices by limiting the number of poles to be used. Such a construction therefore has a large number of advantages in view of the state of the art.

Claims (10)

  1. A platform support device (1A, 1B) for lifting loads or people along a structure, in particular to perform work applied to said structure, this device including:
    - at least one platform (1A, 1B), with vertical movement,
    - modular elements (4, 6), able to be assembled to reach a desired height, forming, in the assembled state, at least two vertical masts (16, 17), the modular elements (4) conforming the mast body and the modular element (6) conforming the mast head,
    - lifting elements (2, 3) of the platform of the winch type able to connect the platform to the modular head elements (6) of the masts, to adjust, as desired, the elevation level of the platform (1A, 1B) along the masts, these lifting elements of the winch type being able to be disconnected from said masts at will,
    - means (5) for temporarily immobilizing the platform (1A, 1B) relative to a modular element (4) of each mast (16, 17), to allow, in the immobilized state of the platform (1A, 1B), the addition or removal, at the head of the masts, of at least one modular mast element (4) as a function of the desired elevation height of the platform (1A, 1B), the placement of each mast element (4, 6) being done from the platform (1A, 1B),
    the or each platform (1A, 1B) being placed between two independent modular masts (16, 17) forming an elevation and guide path, the masts (16, 17) being positioned on either side of the ends of the platform, characterized in that each mast (16, 17) includes at least four uprights (7) connected to one another by spacers (8), inclined or horizontal, the pairs of uprights (7) constituting guide paths, in that each mast (16, 17) has at least two guide paths (11, 12), for the parallel lifting of two platforms, arranging a free surface (13) between them for connecting means to connect the mast to the structure along which each mast is positioned, without detriment to the upward and downward movement of the platform(s) (1A, 1B) along said masts, said surface (13) being free of any stress during the movement of the platform(s) (1A, 1B) along the mast, i.e., free for means connecting the mast to the structure, in that the or each platform (1A, 1B) cooperates with a guide path (11, 12) for each mast (16) so as in particular to allow
    - either a same mast (16) to be used for the parallel lifting, synchronously or asynchronously, of two platforms (1A, 1B),
    - or, after lateral shift of a mast (16), to re-create a lifting path using a single mast (17) by cooperation with the mast (16) having remained in place
    and in that each platform (1A, 1B) is guided in rolling contact along the masts (16, 17), said means for guiding a platform (1A, 1B) along a mast being made up of rollers (9), preferably with a groove, supported by a support (10) able to be separably coupled to the platform (1A, 1B), these rollers (9) rolling along a pair of uprights (7) of the mast.
  2. The device according to claim 1,
    characterized in that the lifting elements (2, 3), of the winch type, are made up of at least one winch body (2) on board the platform (1A, 1B) and a cable extending between the mast and the platform (1A, 1B).
  3. The device according to claim 2,
    characterized in that the winch body (2) is of the type with continuous cable passage of any length to prevent, under certain conditions, the platform (1A, 1B) from bearing the full weight of the cable (3).
  4. The device according to one of claims 2 and 3,
    characterized in that the cable (3) is connected to the mast by a modular mast element systematically making up the mast head element (6).
  5. The device according to claim 1,
    characterized in that some of the spacers (8) of the bar type cooperate with the temporary immobilizing means (5) supported by the platform (1A, 1B) to immobilize the latter.
  6. The device according to one of claims 1 to 5,
    characterized in that the temporary immobilizing means (5) are made up of spring-loaded hooks, these hooks forming a pawl.
  7. The device according to claim 6,
    characterized in that the pawl-forming hooks are manually retracted between two phases for eliminating modular mast elements (4), these phases being carried out in particular during disassembly of the device.
  8. The device according to one of claims 1 to 7,
    characterized in that the mast elements (4) are able to be coupled to the structure along which they are arranged, in particular by anchoring by percussion.
  9. The device according to one of claims 1 to 8,
    characterized in that at least one additional safety device, secured in movement with the platform (1A, 1B), able to keep the platform (1A, 1B) in the bearing position on the masts if the cable (3) of the winch (2) breaks, is provided.
  10. The device according to one of claims 1 to 9,
    characterized in that the platform is equipped with at least two safety devices, each safety device being formed by at least one moving stop (14), preferably two moving stops (14), the movement of which is controlled by tensioning the cable (3) of the winch, to go from a position bearing on a mast in the relaxed state of the cable to a retracted position in the tensioned state of the cable (3) so as to allow the platform to move freely along the mast in the tensioned state of the cable.
EP05763731.6A 2004-07-12 2005-04-29 Platform support device for lifting loads or persons the height of a structure Active EP1766157B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0407745A FR2872841A1 (en) 2004-07-12 2004-07-12 PLATFORM SUPPORT DEVICE FOR ELEVATION OF LOADS OR PEOPLE ALONG A WORK
PCT/FR2005/001086 WO2006016016A1 (en) 2004-07-12 2005-04-29 Platform support device for lifting loads or persons the height of a structure

Publications (2)

Publication Number Publication Date
EP1766157A1 EP1766157A1 (en) 2007-03-28
EP1766157B1 true EP1766157B1 (en) 2017-12-13

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EP05763731.6A Active EP1766157B1 (en) 2004-07-12 2005-04-29 Platform support device for lifting loads or persons the height of a structure

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US (1) US9133632B2 (en)
EP (1) EP1766157B1 (en)
CN (1) CN100570104C (en)
ES (1) ES2660137T3 (en)
FR (1) FR2872841A1 (en)
HK (1) HK1108932A1 (en)
WO (1) WO2006016016A1 (en)

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US20080236944A1 (en) 2008-10-02
WO2006016016A1 (en) 2006-02-16
CN100570104C (en) 2009-12-16
HK1108932A1 (en) 2008-05-23
EP1766157A1 (en) 2007-03-28
CN1997801A (en) 2007-07-11
FR2872841A1 (en) 2006-01-13
US9133632B2 (en) 2015-09-15
ES2660137T3 (en) 2018-03-21

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