EP0879210B1 - Dual-mast self-elevating platform construction - Google Patents

Dual-mast self-elevating platform construction Download PDF

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Publication number
EP0879210B1
EP0879210B1 EP97902309A EP97902309A EP0879210B1 EP 0879210 B1 EP0879210 B1 EP 0879210B1 EP 97902309 A EP97902309 A EP 97902309A EP 97902309 A EP97902309 A EP 97902309A EP 0879210 B1 EP0879210 B1 EP 0879210B1
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EP
European Patent Office
Prior art keywords
platform
masts
carriage
construction according
rack
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EP97902309A
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German (de)
French (fr)
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EP0879210A1 (en
Inventor
Xavier Lombard
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HEK Manufacturing BV
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HEK Manufacturing BV
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    • 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
    • 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

  • an element 17a of platform 16 engages along the tree 32 so that said element 17a retains a rotational mobility along said shaft 32.
  • the trees 32 of the masts 3 and 4 allow an inclination, at least light, from platform 16.
  • FIG. 8b instead of being an element 17a of platform 16 which comes to engage along the shaft 32, we can place a box 17b which supports platform 16.
  • the box 17b can be directly secured to the platform 16, for example by welding, or not. If the box 17b is not directly attached to the platform 16, this is also supported by the tree 32 (as in Figure 8a), and then a game between said box 17b and said platform 16 can to exist. This game confers a certain tolerance of the structure of the invention with slight inclinations of the platform 16. Its usefulness will be seen later.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)
  • Types And Forms Of Lifts (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Ladders (AREA)
  • Warehouses Or Storage Devices (AREA)
  • Bridges Or Land Bridges (AREA)
  • Revetment (AREA)

Abstract

A self-elevating platform construction consisting of first (3) and second (4) vertical masts each provided with a rack (13), first (14) and second (15) carriages movable along the first and second masts respectively, and each provided with a gear (26) rotated by a motor and meshing with the mast rack (13), as well as a support for a platform (16) borne on supporting shafts (32) of said first and second carriages (14, 15) and extending between said first and second masts (3, 4). The construction is characterized in that the platform (16) is rigid and in that the supports (32) of the first and second carriages (14, 15) comprise shafts (32) perpendicular to the rack (13) of the first and second masts (3, 4), respectively. Said construction is mainly suitable for building construction and renovation.

Description

L'invention concerne des structures de plate-forme auto-élévatrices utilisées pour la construction, la rénovation et l'entretien extérieur de bâtiments tels que, notamment, des constructions d'habitation, des constructions administratives ou industrielles, mais aussi, par extension, tels que des navires en cale sèche ou non.The invention relates to platform structures jackups used for construction, renovation and exterior maintenance of buildings such that, in particular, residential constructions, administrative or industrial constructions, but also, by extension, such as ships in the hold dry or not.

Des structures de plate-forme connues sont par exemple présentées dans le brevet français publié sous le numéro FR-A-2671336.Known platform structures are by example presented in the French patent published under FR-A-2671336.

Ces structures comportent des premier et second mâts verticaux munis chacun d'une crémaillère. Des pignons montés sur des chariots motorisés mobiles s'engrènent dans la crémaillère de chaque mât et entraínent une plate-forme horizontale portée par les chariots, en translation verticale. La plate-forme, ainsi que le personnel et les outils qu'elle supporte, s'élève ou descend à volonté, en vue de réaliser des travaux précis à une hauteur adéquate sur un bâtiment.These structures include first and second vertical masts each provided with a rack. of the sprockets mounted on mobile motorized carriages mesh in the rack of each mast and result in a horizontal platform carried by the trolleys, in vertical translation. The platform, as well as the staff and the tools it supports, rises or falls at will, in order to achieve precise work at an adequate height on a building.

Les plates-formes connues s'étendent entre les mâts et aussi de part et d'autre de ceux-ci. Elles se décomposent en éléments modulaires qui, assemblés les uns aux autres, forment au moins trois segments distincts : un segment central et deux segments latéraux. Le segment central s'étend uniquement entre les mâts et les segments latéraux s'étendent uniquement de part ou d'autre de ceux-ci. Les segments latéraux et le segment central sont reliés, à la hauteur de chaque mât, aux chariots.The known platforms extend between the masts and also on both sides of them. They break down into modular elements which, when assembled to each other, form at least three segments distinct: a central segment and two segments side. The central segment extends only between masts and side segments extend only on either side of them. The lateral segments and the central segment are connected, at the height of each mast, to carts.

Les liaisons entre les segments et les chariots présentent au moins un degré de liberté en rotation de manière à ce qu'une légère inclinaison d'un segment par rapport à l'horizontale soit tolérée. De ce fait, les segments sont indépendants les uns des autres et un effort appliqué à l'un d'eux peut ne pas être transmis à un autre segment, mais seulement, sous la forme d'un couple, au chariot et, plus précisément, aux mâts par l'intermédiaire de galets de guidage. La rotation des segments par rapport aux mâts est alors mise à profit pour réaliser un mécanisme compliqué de blocage du mouvement de la plate-forme lorsque l'inclinaison devient trop forte.The connections between the segments and the carriages have at least one degree of freedom in rotation of so that a slight inclination of a segment by horizontal is tolerated. Therefore, the segments are independent of each other and a force applied to one of them may not be transmitted to another segment, but only, in the form of a torque, to the carriage and, more precisely, to the masts by through guide rollers. The rotation of segments in relation to the masts is then taken advantage of to make a complicated mechanism for blocking the platform movement when tilting becomes too strong.

Une telle structure entraíne cependant la construction de chariots à plaque flottante, dans lesquels les pignons sont portés par une plaque, qui est flottante en translation horizontale et verticale dans le chariot. En effet, cette plaque qui porte les pignons d'engrenage, est maintenue dans un logement du chariot par des moyens élastiques, notamment des ressorts. Les efforts transmis par les segments aux chariots se répartissent alors uniformément sur quatre galets de guidage disposés deux à deux, de chaque côté du chariot, et pour chaque côté, l'un au-dessus de l'autre. Un tel mécanisme est complexe et cher.Such a structure, however, construction of floating plate trolleys, in which the pinions are carried by a plate, which is floating in horizontal and vertical translation in the cart. Indeed, this plate which carries the gear gears, is held in a housing of the carriage by elastic means, in particular springs. The efforts transmitted by the segments to carts are then distributed evenly over four guide rollers arranged in pairs, on each side of the carriage, and for each side, one above the other. Such a mechanism is complex and expensive.

En outre, des robots, portés par la plate-forme, ne peuvent se déplacer d'un segment à un autre, mais restent cantonnés sur l'un deux.In addition, robots, carried by the platform, cannot move from one segment to another, but remain confined to one of them.

Considérant l'état de la technique exposé ci-dessus, un problème que se propose de résoudre l'invention est de construire une structure auto-élévatrice, qui pallie à moindre coût les inconvénients précités, et dans laquelle la transmission des efforts au niveau des pignons engrenés sur la crémaillère ne soit pas génératrice de couples à l'origine de perturbations des mouvements de translation de la plate-forme.Considering the state of the art exposed above, a problem that we propose to solve the invention is to build a self-elevating structure, which overcomes the disadvantages at a lower cost mentioned above, and in which the transmission of forces at the level of the pinions engaged on the rack do not either not generating couples at the origin of disturbances in the translational movements of the platform.

Selon l'invention, la solution à ce problème posé réside dans une structure auto-élévatrice dans laquelle la plate-forme, qui s'étend entre les mâts et éventuellement, de part et d'autre de ceux-ci, est rigide, et en ce qu'on a placé des arbres de support de ladite plate-forme sur les chariots perpendiculairement à la crémaillère, c'est-à-dire avec des axes orthogonaux et sécants à ladite crémaillère.According to the invention, the solution to this problem resides in a self-elevating structure in which the platform, which extends between the masts and eventually, on either side of these, is rigid, and in that we placed support shafts said platform on the carriages perpendicularly rack-and-pinion, i.e. with axes orthogonal and intersecting with said rack.

Aussi, l'invention a pour objet une structure de plate-forme auto-élévatrice composée :

  • d'un premier et d'un second mâts verticaux munis chacun d'une crémaillère ;
  • d'un premier et d'un second chariots mobiles le long desdits premier et second mâts respectivement et comportant chacun, d'une part, un pignon entraíné en rotation par un moteur et engrené sur la crémaillère des mâts et, d'autre part, un support ;
  • d'une plate-forme portée par le support desdits premier et second chariots et s'étendant entre lesdits premier et second mâts,
caractérisée par les caractéristiques discriminantes de la revendication 1.Also, the subject of the invention is a self-elevating platform structure composed:
  • first and second vertical masts each provided with a rack;
  • first and second movable carriages along said first and second masts respectively and each comprising, on the one hand, a pinion driven in rotation by a motor and meshed on the rack of the masts and, on the other hand, a support ;
  • a platform carried by the support of said first and second carriages and extending between said first and second masts,
characterized by the discriminating features of claim 1.

La rigidité de la plate-forme, entre les mâts et de part et d'autre de ceux-ci permettra à des robots, portés par ladite plate-forme, de se déplacer sur l'entière longueur de celle-ci.The rigidity of the platform, between the masts and on either side of these will allow robots, carried by said platform, to move on the entire length of it.

La description qui va suivre, et qui ne comporte aucun caractère limitatif, permettra de mieux comprendre la manière dont l'invention peut être mise en pratique. The description which follows, and which does not include no limitation, will allow better understand how the invention can be implemented in practice.

Elle doit être lue au regard des dessins annexés, dans lesquels :

  • la figure 1 montre, en vue de face, une structure de plate-forme auto-élévatrice selon l'invention ;
  • la figure 2 montre, en vue de profil, une structure de plate-forme auto-élévatrice selon l'invention ;
  • la figure 3 montre, en vue de face, la disposition des différents galets et pignons d'un chariot d'une structure de plate-forme auto-élévatrice selon l'invention ;
  • la figure 4 montre, en vue de dessus, un chariot d'une structure de plate-forme auto-élévatrice selon l'invention ;
  • la figure 5 représente, en perspective, un chariot d'une structure de plate-forme auto-élévatrice selon l'invention ;
  • la figure 6 illustre, de manière schématique, la répartition des forces appliquées à une plate-forme d'une structure selon l'invention ;
  • la figure 7 illustre, de manière schématique et exagérée, une inclinaison d'un chariot d'une structure de plate-forme auto-élévatrice selon l'invention ;
  • les figures 8a, 8b et 8c illustrent, de manière schématique, un blocage d'une structure de plate-forme auto-élévatrice selon l'invention ;
  • les figures 9 et 10 illustrent, en vue de dessus et en coupe, la disposition de plateaux d'une plate-forme d'une structure selon l'invention ; et
  • la figure 11 illustre, de manière schématique, une structure de plate-forme auto-élévatrice selon l'invention, dans une position basse dite de transport.
It should be read in conjunction with the accompanying drawings, in which:
  • Figure 1 shows, in front view, a self-elevating platform structure according to the invention;
  • Figure 2 shows, in side view, a self-elevating platform structure according to the invention;
  • FIG. 3 shows, in front view, the arrangement of the different rollers and pinions of a carriage of a jack-up platform structure according to the invention;
  • Figure 4 shows, in top view, a carriage of a jack-up platform structure according to the invention;
  • FIG. 5 represents, in perspective, a carriage of a self-elevating platform structure according to the invention;
  • Figure 6 illustrates, schematically, the distribution of forces applied to a platform of a structure according to the invention;
  • FIG. 7 illustrates, schematically and exaggerated, an inclination of a carriage of a jack-up platform structure according to the invention;
  • FIGS. 8a, 8b and 8c illustrate, schematically, a blocking of a jack-up platform structure according to the invention;
  • Figures 9 and 10 illustrate, in top view and in section, the arrangement of plates of a platform of a structure according to the invention; and
  • Figure 11 illustrates, schematically, a self-elevating platform structure according to the invention, in a low position called transport.

Les figures 1 et 2 montrent une structure de plate-forme auto-élévatrice 1 selon l'invention, placée devant une façade 2 d'un bâtiment en construction ou en rénovation.Figures 1 and 2 show a structure of self-elevating platform 1 according to the invention, placed in front of a facade 2 of a building under construction or in renovation.

Cette structure 1 comporte deux mâts verticaux, un premier mât 3 et un second mât 4 séparés l'un de l'autre d'une distance, dans un exemple de l'ordre de dix mètres. Ces mâts 3, 4 sont formés de montants métalliques 5 reliés entre eux par des barres 6 obliques ou horizontales. En fonction du nombre et de la position desdits montants 5, les mâts 3, 4 présentent une section rectangulaire, carrée ou triangulaire. La description qui suit est faite en référence à une structure à deux mâts, mais, du fait de la rigidité de la plate-forme, on pourra facilement transposer l'enseignement de l'invention à une structure à plus de deux mâts si le besoin s'en fait sentir.This structure 1 comprises two vertical masts, one first mast 3 and a second mast 4 separated one of the other from a distance, in an example of the order of ten meters. These masts 3, 4 are formed of uprights metallic 5 connected together by bars 6 oblique or horizontal. Depending on the number and the position of said uprights 5, the masts 3, 4 have a rectangular, square or triangular. The following description is given in reference to a structure with two masts, but, due to rigidity of the platform, we can easily transpose the teaching of the invention to a structure with more than two masts if the need arises feel.

Les mâts 3, 4 reposent sur des plateaux 7, 8 formant supports et maintenus horizontaux par des vérins réglables 9 s'appuyant sur un sol 10. Ils sont en outre avantageusement fixés de place en place, par exemple tous les cinq mètres, à la façade 2 du bâtiment, par des ancrages 11 suffisamment forts pour résister aux efforts de tractions et torsions qui s'exercent sur la structure 1.The masts 3, 4 rest on trays 7, 8 forming supports and kept horizontal by adjustable cylinders 9 resting on a floor 10. They are further advantageously fixed from place to place, by example every five meters, on facade 2 of building, by anchors 11 strong enough to resist the efforts of pulls and twists which are exerted on structure 1.

Chaque mât 3, 4 est muni, sur toute sa hauteur, d'une crémaillère figurée en trait épais à la figure 1. On a donc une première crémaillère 12 sur le mât 3 et une seconde crémaillère 13 sur le mât 4. Les crémaillères 12, 13 sont soudées ou boulonnées aux mâts 3, 4, par exemple aux barres 6. Each mast 3, 4 is provided, over its entire height, a rack shown in thick line in Figure 1. So we have a first rack 12 on mast 3 and a second rack 13 on the mast 4. The racks 12, 13 are welded or bolted to the masts 3, 4, for example at bars 6.

Enfin, chaque mât 3, 4 porte un chariot. On a donc un premier chariot 14 sur le mât 3 et un second chariot 15 sur le mat 4.Finally, each mast 3, 4 carries a carriage. So we have a first carriage 14 on the mast 3 and a second carriage 15 on mast 4.

Les chariots 14, 15 supportent une plate-forme 16 qui s'étend entre les mâts 3, 4 et de part et d'autre de ceux-ci, en porte-à-faux. Selon l'invention, la plate-forme 16 se compose d'éléments 17 assemblés de manière à former un ensemble continu et rigide entre les mats 3, 4, et de part et d'autre de ceux-ci. Bien entendu, on pourra rajouter des extensions aux extrémités latérales de ladite plate-forme 16, ce qui permettra d'augmenter sensiblement sa longueur en vue, notamment, d'utilisations à faible hauteur.The carriages 14, 15 support a platform 16 which extends between masts 3, 4 and on either side of these, cantilevered. According to the invention, the platform 16 consists of 17 elements assembled from so as to form a continuous and rigid whole between the masts 3, 4, and on either side thereof. Well of course, we can add extensions to lateral ends of said platform 16, which will significantly increase its length in view, in particular, for uses at low height.

La plate-forme 16 présente, à son pourtour, des barrières de sécurité 18 en vue d'une protection des personnes qui s'y trouvent ainsi que de celles qui sont au-dessous, alors protégées des chutes d'objets.The platform 16 has, at its periphery, safety barriers 18 for the protection of people there as well as those who are below, then protected from falling objects.

Les chariots 14, 15 sont mobiles en translation verticale le long des mâts 3, 4. Aussi, lorsque les chariots 14, 15 s'élèvent, la plate-forme 16 s'élève, et lorsque les chariots 14, 15 descendent, la plate-forme 16 descend.The carriages 14, 15 are movable in translation vertical along the masts 3, 4. Also, when the carriages 14, 15 rise, the platform 16 rises, and when the carriages 14, 15 descend, the platform 16 goes down.

A cet effet, des moteurs 19 montrés uniquement aux figures 3 et 4, portés par les chariots 14, 15 sont reliés par des câbles électriques 20 à une source d'alimentation 21. La commande d'alimentation des moteurs 19 est de préférence située sur la plate-forme 16 de manière à ce que les occupants puissent la manoeuvrer eux-mêmes.For this purpose, motors 19 shown only to Figures 3 and 4, carried by the carriages 14, 15 are connected by electric cables 20 to a source supply 21. The supply control for motors 19 is preferably located on the platform 16 so that the occupants could have it. maneuver themselves.

Si l'on se rapporte désormais aux figures 3, 4 et 5, on a représenté le chariot 15 comportant une plaque métallique 22. Cette plaque 22, ou alors un arrangement de profilés constituant son ossature principale, porte, sur une de ses faces 23, d'une part, trois pignons dentés : deux pignons d'entraínement 24, 25 et un pignon moteur 26. Elle porte d'autre part, deux galets de pressage 27, 28. Ces pignons 24, 25, 26 et galets 27, 28 sont montés tournants sur la plaque 22, de manière à ce que leurs axes de rotation la traversent, perpendiculairement.If we now refer to Figures 3, 4 and 5, there is shown the carriage 15 comprising a plate metallic 22. This plate 22, or an arrangement profiles constituting its main frame, door, on one of its faces 23, on the one hand, three pinions toothed: two drive sprockets 24, 25 and one motor pinion 26. It also carries two rollers pressing 27, 28. These pinions 24, 25, 26 and rollers 27, 28 are rotatably mounted on the plate 22, of so that their axes of rotation pass through it, perpendicularly.

Le pignon moteur 26 est engrené sur les deux pignons d'entraínement 24, 25 et ces derniers sont eux-mêmes engrenés sur un côté denté 29 de la crémaillère 13 du mât 4. Le pignon 26 est ainsi considéré comme étant engrené sur la crémaillère 13, de manière indirecte.The drive pinion 26 is meshed on both drive sprockets 24, 25 and these are themselves meshed on a toothed side 29 of the rack 13 of the mast 4. The pinion 26 is thus considered to be being engaged on the rack 13, so indirect.

Les galets de pressage 27, 28 viennent, quant à eux, appuyer à un côté non denté 30 de la crémaillère 13 opposé à son côté denté 29, directement en face des pignons d'entraínement 24, 25.The pressing rollers 27, 28 come, as for them, press on a toothless side 30 of the rack 13 opposite its toothed side 29, directly opposite the drive sprockets 24, 25.

La translation verticale du chariot 15 s'explique de la manière suivante. Le moteur électrique 19 du chariot 15 couplé à un réducteur et porté par une face opposée 31 à la face 23 de la plaque 22 entraíne le pignon moteur 26 en rotation. Cette rotation se répercute aux pignons d'entraínement 24, 25 qui se déplacent sur la crémaillère 13, entraínent la montée ou la descente du chariot 15, les galets de pressage 27, 28 limitant l'échappement latéral desdits pignons 24, 25 hors de ladite crémaillère 13. Cet ensemble a pour résultat la présence d'un centre G de traction du chariot situé dans le plan du côté 29 de la crémaillère à mi-chemin des engrenages des pignons 24, 25 sur la crémaillère 13. Tout se passe comme si le chariot était tiré par le centre G.The vertical translation of the carriage 15 can be explained as follows. The electric motor 19 of carriage 15 coupled to a reduction gear and carried by one face opposite 31 to the face 23 of the plate 22 drives the motor pinion 26 in rotation. This rotation is feeds back to the drive sprockets 24, 25 which move on the rack 13, cause the climb or the descent of the carriage 15, the pressing rollers 27, 28 limiting the lateral exhaust of said pinions 24, 25 outside said rack 13. This assembly has as a result the presence of a G traction center of the carriage located in the plane on the side 29 of the rack halfway between the gears of the pinions 24, 25 on the rack 13. Everything happens as if the carriage was pulled by center G.

Bien entendu, on peut envisager un chariot 15 comportant un pignon moteur 26 directement engrené sur la crémaillère 13. Cependant, grâce à la présence de deux pignons d'entraínement 24, 25 judicieusement placés comme ci-dessus, on répartit également les couples exercés par le moteur 19 sur le pignon moteur 26 dans les pignons d'entraínement 24, 25 et à la crémaillère 13.Of course, we can consider a carriage 15 comprising a motor pinion 26 directly engaged on the rack 13. However, thanks to the presence of two drive sprockets 24, 25 judiciously placed as above, we also distribute the torques exerted by the motor 19 on the motor pinion 26 in the drive sprockets 24, 25 and at the rack 13.

Selon l'invention, chaque chariot 14, 15 comporte un support axial. Ce support axial est formé d'un arbre métallique amovible 32 logé, en l'une de ses extrémités libre en rotation, dans un palier 33. Le palier 33 est fixé au bas de la plaque 22, côté moteur 19. Il pourrait néanmoins être fixé de l'autre côté de la plaque 22, du moment que l'arbre 32 ne vienne pas au contact de la crémaillère 13. L'arbre 32 est perpendiculaire à la crémaillère 13. En effet, le centre du palier 33 est situé dans le plan du côté denté 29 de la crémaillère 13 qui par ailleurs contient le centre G. Ainsi que cela est montré en figure 5, l'arbre de support 32 est soutenu, à une autre extrémité, par un autre palier 36. L'autre palier 36 est fixé par deux barreaux horizontaux 34, 35 fixés, notamment par soudage, en l'une de leurs extrémités, à la plaque 22, et se rejoignant, en leur autre extrémité, sur le palier 36. le palier 36 est percé d'un trou débouchant 37 traversé par ledit arbre de support 32. Les barreaux 34, 35 définissent donc un triangle. Une autre structure est cependant envisageable pour tenir le palier 36.According to the invention, each carriage 14, 15 comprises an axial support. This axial support is formed by a shaft removable metal 32 housed at one of its ends free to rotate, in a bearing 33. The bearing 33 is fixed to the bottom of the plate 22, motor side 19. It could nevertheless be attached to the other side of the plate 22, as long as the shaft 32 does not come to the contact with the rack 13. The shaft 32 is perpendicular to the rack 13. Indeed, the center of bearing 33 is located in the side plane toothed 29 of rack 13 which also contains center G. As shown in figure 5, the support shaft 32 is supported, to another end, by another bearing 36. The other bearing 36 is fixed by two horizontal bars 34, 35 fixed, in particular by welding, at one of their ends, to plate 22, and joining, in their other end, on the bearing 36. the bearing 36 is drilled of a through hole 37 crossed by said shaft support 32. The bars 34, 35 therefore define a triangle. Another structure is however possible to hold the bearing 36.

Chaque chariot 14, 15 comporte en outre un premier et un second galets de guidage 38, 39 montés tournants sur la plaque 22 selon des axes de rotation la traversant perpendiculairement. Ces galets 38, 39 sont disposés en partie inférieure de la plaque 22. Ils sont situés symétriquement de part et d'autre de l'arbre de support 32 de chaque chariot 14, 15, horizontalement. Ils appuient sur les montants verticaux 5 du mât 4. Les axes des galets 38, 39 et ceux de l'arbre 32 sont situés dans un même plan représenté par un axe horizontal.Each carriage 14, 15 further comprises a first and a second guide rollers 38, 39 mounted to rotate on the plate 22 along axes of rotation the crossing perpendicularly. These rollers 38, 39 are arranged in the lower part of the plate 22. They are symmetrically located on either side of the tree support 32 of each carriage 14, 15, horizontally. They press on the vertical uprights 5 of the mast 4. The axes of the rollers 38, 39 and those of the shaft 32 are located in the same plane represented by an axis horizontal.

En pratique, et ainsi que cela est plus particulièrement montré à la figure 8a, un élément 17a de la plate-forme 16 vient s'engager le long de l'arbre 32 de manière à ce que ledit élément 17a conserve une mobilité en rotation selon ledit arbre 32. Aussi, les arbres 32 des mâts 3 et 4 autorisent une inclinaison, au moins légère, de la plate-forme 16. D'autres modes de réalisation sont néanmoins envisageables. Notamment, à la figure 8b, au lieu que ce soit un élément 17a de la plate-forme 16 qui vienne s'engager le long de l'arbre 32, on peut placer un caisson 17b qui soutient la plate-forme 16. Dans ce mode de réalisation, le caisson 17b peut être directement solidarisé à la plate-forme 16, par exemple par soudage, ou non. Si le caisson 17b n'est pas directement solidaire de la plate-forme 16, celle-ci est supportée également par l'arbre 32 (comme à la figure 8a), et alors un jeu entre ledit caisson 17b et ladite plate-forme 16 peut exister. Ce jeu confère une certaine tolérance de la structure de l'invention aux légères inclinaisons de la plate-forme 16. Son utilité sera vue plus loin.In practice, and as is more particularly shown in Figure 8a, an element 17a of platform 16 engages along the tree 32 so that said element 17a retains a rotational mobility along said shaft 32. Also, the trees 32 of the masts 3 and 4 allow an inclination, at least light, from platform 16. Other modes are nevertheless possible. Especially, in FIG. 8b, instead of being an element 17a of platform 16 which comes to engage along the shaft 32, we can place a box 17b which supports platform 16. In this embodiment, the box 17b can be directly secured to the platform 16, for example by welding, or not. If the box 17b is not directly attached to the platform 16, this is also supported by the tree 32 (as in Figure 8a), and then a game between said box 17b and said platform 16 can to exist. This game confers a certain tolerance of the structure of the invention with slight inclinations of the platform 16. Its usefulness will be seen later.

Relativement à la figure 6, lorsqu'un effort F est appliqué sur la plate-forme 16, eu égard à la rigidité de celle-ci, cet effort F est transmis aux arbres de support 32 où il se décompose en deux forces verticales F/2 correspondant à la moitié de l'effort F appliqué. Les arbres de support 32 étant perpendiculaires aux crémaillères 12, 13 les réactions R opposées aux forces F/2 sont elles-aussi verticales et se confondent avec les deu>: axes de traction de la plate-forme 16 et, de ce fait, avec les deux crémaillères 12, 13. Aussi, un effort F appliqué sur la plate-forme 16 n'engendrera pas de couple sur le chariot 14, 15 ou sur les pignons 24, 25. Ledit chariot 14, 15 reste dans l'alignement de la crémaillère 12, 13. Ceci est matérialisé par un axe vertical de symétrie, sur la figure 3, passant par l'axe de l'arbre 32 et par le centre G.Relative to FIG. 6, when an effort F is applied to platform 16, having regard to rigidity of this, this force F is transmitted to the trees of support 32 where it breaks down into two vertical forces F / 2 corresponding to half of the force F applied. The support shafts 32 being perpendicular to the racks 12, 13 R reactions opposed to forces F / 2 are also vertical and merge with the two>: axes of traction of the platform 16 and, from this fact, with the two racks 12, 13. Also, a force F applied on the platform 16 will not generate no torque on the carriage 14, 15 or on the pinions 24, 25. Said carriage 14, 15 remains in alignment with the rack 12, 13. This is materialized by an axis vertical symmetry, in Figure 3, passing through the axis of the tree 32 and through the center G.

Il résulte de ce qui précède qu'il suffit d'un unique capteur d'effort, par exemple un peson, judicieusement placé selon chacun des deux arbres de support 32, pour mesurer l'effort F sur toute la plate-forme 16. En pratique, un second capteur d'effort est prévu, pour des raisons de sécurité. Dans un exemple, un tel capteur est monté dans le palier 36 ou même à l'intérieur de l'arbre 32 à l'endroit où cet arbre repose dans un des paliers.It follows from the above that just one single force sensor, for example a load cell, judiciously placed according to each of the two trees of support 32, to measure the force F on the whole platform 16. In practice, a second force sensor is planned, for security reasons. In one example, such a sensor is mounted in the bearing 36 or even at inside of tree 32 where this tree rests in one of the bearings.

A la figure 7, on montre que la crémaillère 13 ne décrit pas une ligne strictement verticale, mais présente une inclinaison α par rapport au mât 4, habituellement de l'ordre de 1 %. Ceci est dû à la tolérance de montage de la crémaillère dans les mâts. Dans un tel cas, le chariot 15, qui comporte uniquement deux galets de guidage 38, 39 alignés de part et d'autre de l'axe de support, et qui, de ce fait, n'est pas guidé ou retenu dans sa partie supérieure, pivote selon l'axe de l'arbre 32 de manière à suivre l'inclinaison de la crémaillère 13. La plate-forme 16 conserve néanmoins une position sensiblement horizontale. En variante, le chariot est à plaque flottante mais il n'y a toujours que deux galets 38, 39. Dans tous les cas, on évite les mécanismes compliqués connus qui sont censés prendre en compte ces défauts de construction des mâts. In FIG. 7, it is shown that the rack 13 does not not describe a strictly vertical line, but has an inclination α relative to the mast 4, usually around 1%. This is due to the tolerance for mounting the rack in the masts. In such a case, the carriage 15, which comprises only two guide rollers 38, 39 aligned on one side and on the other side of the support axis, and which, therefore, is not not guided or retained in its upper part, pivots along the axis of the tree 32 so as to follow the inclination of the rack 13. The platform 16 nevertheless retains a position substantially horizontal. Alternatively, the trolley is plate floating but there are still only two rollers 38, 39. In all cases, the mechanisms are avoided known complicated which are supposed to take into account these defects in the construction of the masts.

Aux figures 8a et 8b, on a schématisé la plate-forme 16 inclinée d'un angle β par rapport à l'horizontale. Dans un premier cas (figure 8a), c'est l'élément 17a de la plate-forme 16 vient s'engager le long de l'arbre 32. Dans un second cas (figure 8b), le caisson 17b vient s'engager le long dudit arbre 32. Une telle configuration n'est en pratique acceptée que lorsque β est inférieur à 1 %. Entre 1 et 2 %, on agit sur les moteurs 19 de manière ce que l'inclinaison soit régulée. A partir de 2 %, les moteurs 19 sont coupés pour permettre le rattrapage et lorsque β atteint 3 %, la translation verticale est bloquée. A cet effet, on a prévu, selon l'invention, des butées de freinage ou patins-freins 40, 41. A la figure 8c, ces patins-freins 40, 41 sont montrés solidaires de l'élément 17a de la plate-forme 16 ou du caisson 17b, auxquels ils sont soudés ou boulonnés. A cet effet, ils sont montés sur des consoles qui sont fixées à l'élément 17a ou 17b. Ces consoles se projettent horizontalement au delà du plan de la plaque 22, par exemple en passant sous cette plaque comme montré figures 8a et 8b. Les consoles sont situées à proximité des montants verticaux 5 des mâts 3, 4, de manière à ce que, lorsque la plate-forme 16 est horizontale, un jeu donné les sépare desdits montants 5. Ce jeu est réglé pour qu'une inclinaison de 3 % de la plate-forme 16 place les freins 40, 41 en contact avec les montants 5 des mâts 3, 4. La figure 8c montre encore des paliers 33b et 36b, solidaires de l'élément 17a ou du caisson 17b et montés dans celui-ci de telle façon que l'arbre 32 puisse les traverser en même temps que les paliers 33 et 36.In Figures 8a and 8b, the platform is shown schematically 16 inclined by an angle β relative to the horizontal. In a first case (Figure 8a), it is element 17a of platform 16 engages the along the tree 32. In a second case (FIG. 8b), the box 17b engages along said shaft 32. A such a configuration is only accepted in practice when β is less than 1%. Between 1 and 2%, we act on motors 19 so that the inclination is regulated. From 2%, the motors 19 are cut off to allow catching up and when β reaches 3%, vertical translation is blocked. To this end, we have provided, according to the invention, braking stops or brake pads 40, 41. In FIG. 8c, these brake pads 40, 41 are shown integral with the element 17a of the platform 16 or box 17b, to which they are welded or bolted. For this purpose, they are mounted on brackets that are attached to item 17a or 17b. These consoles project horizontally beyond the plane of the plate 22, for example passing under this plate as shown in Figures 8a and 8b. The consoles are located near the vertical uprights 5 of the masts 3, 4, so that when the platform 16 is horizontal, a given clearance separates them from said 5. This clearance is adjusted so that an inclination of 3% of the platform 16 places the brakes 40, 41 in contact with the uprights 5 of the masts 3, 4. Figure 8c also shows bearings 33b and 36b, integral with the element 17a or of the box 17b and mounted therein so that the shaft 32 can pass through them same time as landings 33 and 36.

Aux figures 9 et 10, on a schématisé, en vue de dessus et en coupe transversale respectivement, la plate-forme 16, réalisée par l'assemblage rigide des éléments 17. Ces éléments 17, de section ici triangulaire et de forme allongée présentent, en leur partie supérieure, chacun un plateau 42 mobile transversalement. Ils comportent en outre des plateaux 43 rabattables horizontalement. L'ensemble des plateaux 42 et 43 constitue le plancher de la plate-forme 16. Selon un aspect avantageux de l'invention, les plateaux 42 sont mobiles coulissants transversalement et le long de la plate-forme 16. D'autre part, les plateaux 43 sont avantageusement mobiles coulissants longitudinalement le long des bords de la plate-forme 16. Aussi, la plate-forme présente une certaine modularité qui lui permet de se conformer aux exigence dimensionnelles imposées par les bâtiments. Cette modularité est notable, étant donné que la plate-forme 16 est rigide et que, de ce fait, la position des plateaux 43 peut être quelconque le long de ladite plate-forme 16, les chariots ne constituant pas d'obstacle à la mobilité desdits plateaux 43. Notamment ces plateaux coulissants peuvent atteindre les extrémités des segments en porte-à-faux.Figures 9 and 10 show diagrammatically, with a view to above and in cross section respectively, the platform 16, produced by the rigid assembly of elements 17. These elements 17, of section here triangular and elongated shape have, in their upper part, each a movable plate 42 transversely. They also have trays 43 foldable horizontally. All the trays 42 and 43 constitutes the floor of the platform 16. According to an advantageous aspect of the invention, the trays 42 are movable sliding transversely and along of the platform 16. On the other hand, the plates 43 are advantageously mobile sliding longitudinally along the edges of the platform 16. Also, the platform has a certain modularity which allows it to comply with requirements dimensions imposed by buildings. This modularity is notable, given that the platform 16 is rigid and therefore the position of the trays 43 may be arbitrary along said platform 16, the carriages not constituting obstacle to the mobility of said plates 43. In particular these sliding shelves can reach ends of the cantilever segments.

Par ailleurs, à la figure 10, on a schématisé un robot ou une grue 48. Ce robot 48 est mobile. Il est susceptible de se déplacer sur l'entière longueur de la plate-forme 16, par exemple avec un piètement coulissant au sein de rails de retenue 49 solidaires de ladite plate-forme 16. En effet, la rigidité et la continuité de la plate-forme 16, notamment au-delà des mâts 3, 4, autorise de tels déplacements. Il résulte de ce qui précède qu'il suffit d'un unique robot 48 par structure 1 de l'invention pour le chargement ou déchargement ou pour le transfert de matériaux à un endroit donné sur la plate-forme 16, entre les mâts 3, 4, ou de part et d'autre de ceux-ci. La figure 10, montre également un plateau 50, coulissant lui aussi longitudinalement à la plate-forme 16 dans des rails 49 de maintien fixés au éléments 17. Le plateau 50 permet de s'approcher au plus près de la façade 2. Il y a un plateau 50 entre les mâts 3 et 4 et un de part et d'autre de chaque mât.Furthermore, in FIG. 10, a diagram is shown robot or a crane 48. This robot 48 is mobile. It is likely to move the entire length of the platform 16, for example with a base sliding within retaining rails 49 integral with said platform 16. Indeed, the rigidity and the continuity of the platform 16, in particular beyond the masts 3, 4, authorizes such displacements. It results from the above it only takes a single robot 48 per structure 1 of the invention for loading or unloading or for the transfer of materials to a given place on the platform 16, between the masts 3, 4, or on either side thereof. Figure 10, also shows a tray 50, sliding too longitudinally to the platform 16 in rails 49 holding fixed to the elements 17. The plate 50 allows to get as close as possible to facade 2. There is a plate 50 between masts 3 and 4 and a share and on the other side of each mast.

A la figure 11, on a représenté la structure de plate-forme auto-porteuse 1 de l'invention, dans une position basse dite de transport. Dans cette position, la plate-forme 16 est maintenue dans des réceptacles 47 solidaires des plateaux 7, 8 formant support. Les vérins 9 sont réglés en position haute. Aussi, un jeu de deux roues 45, 46 de chaque plateaux 7, 8 reposent sur le sol 10. L'ensemble ainsi décrit forme un châssis de transport adéquat. En effet, la plate-forme 16 étant rigide, il suffit de seulement deux roues par plateau 7, 8 pour le transport de la structure 1 de l'invention au lieu de quatre pour les structures à plate-forme segmentée de l'art antérieur. Les axes des roues des plateaux sont dans l'alignement des mâts. Pour l'orientation, il suffit qu'un seul jeu de roues soit orientable. Aussi, la structure 1 de l'invention est bien plus pratique à manoeuvrer que les structures de l'art antérieur.In Figure 11, the structure of self-supporting platform 1 of the invention, in a low position called transport. In this position, the platform 16 is held in receptacles 47 integral with the plates 7, 8 forming a support. The cylinders 9 are adjusted in the high position. Also, a game of two wheels 45, 46 of each plates 7, 8 rest on the ground 10. The assembly thus described forms a frame adequate transportation. Indeed, the platform 16 being rigid, just two wheels per tray 7, 8 for transporting the structure 1 of the invention instead of four for platform structures segmented from the prior art. The axes of the wheels of trays are in line with the masts. For the orientation, it is enough that only one set of wheels is adjustable. Also, the structure 1 of the invention is much more practical to maneuver than the structures of prior art.

La solution de la présente invention ainsi décrite apparaít donc à l'origine de multiples améliorations sensibles qui, notamment, ont des répercussions importantes sur le plan de la sécurité, de la solidité et de la commodité d'emploi des structures de plate-forme auto-élévatrices.The solution of the present invention thus described therefore appears at the origin of multiple improvements sensitive which, in particular, have repercussions important in terms of safety, solidity and convenience of platform structures jackup.

Claims (10)

  1. Self-elevating platform construction (1), composed of:
    a first (3) and a second (4) vertical mast, each of which being equipped with a toothed rack (12, 13);
    a first (14) and a second (15) carriage movable along said first (3) and second (4) masts, respectively and each of which comprising a pinion (26) driven for rotation by means of a motor (19) and engaged with said toothed rack (12, 13) of said masts (3, 4), on one side, and a support (32), on the other side;
    a platform (16) that is carried by said supports (32) of said first (14) and second (15) carriages and that extends between said first (3) and second (4) masts, characterized in that said platform (16) is rigid, and that the supports (32) of the first (14) and second (15) carriages comprise removable shafts (32) arranged perpendicularly with respect to the toothed rack (12, 13) of said first (3) and second (4) masts respectively, and that said removable shafts are for fixing an element (17) of said platform to a carriage (14, 15).
  2. Construction according to claim 1, characterized in that said platform (16) extends to both sides of the masts (3, 4), and that a robot (48) carried by said platform (16) is movable along said platform (16) between said masts (3, 4) and to both sides of the same.
  3. Construction according to one of the claims 1 or 2, characterized in that each carriage (14, 15) comprises a first (38) and a second (39) guide roller of said carriage (14, 15).
  4. Construction according to claim 3, characterized in that each carriage (14, 15) comprises only two guide rollers (38, 39).
  5. Construction according to one of the claims 3 or 4, characterized in that said first (38) and second (39) guide rollers are horizontally aligned on both sides of the supporting shaft (32) of said carriage (14, 15).
  6. Construction according to any one of the preceding claims, characterized in that it comprises a load sensor which is placed depending on one of the supporting shafts (32).
  7. Construction according to any one of the preceding claims, characterized in that it comprises two brake stops (40, 41) integrally with said platform (16).
  8. Construction according to any one of the preceding claims, characterized in that it comprises only four wheels (45, 46).
  9. Construction according to any one of the preceding claims, characterized in that it comprises movable plates (42).
  10. Construction according to any one of the preceding claims, characterized in that it comprises guide rails (49) extending over its total length and even to both sides of the masts.
EP97902309A 1996-02-05 1997-02-04 Dual-mast self-elevating platform construction Expired - Lifetime EP0879210B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9601362 1996-02-05
FR9601362A FR2744436B1 (en) 1996-02-05 1996-02-05 BIMATS SELF-LIFTING PLATFORM STRUCTURE
PCT/EP1997/000483 WO1997029040A1 (en) 1996-02-05 1997-02-04 Dual-mast self-elevating platform construction

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EP0879210A1 EP0879210A1 (en) 1998-11-25
EP0879210B1 true EP0879210B1 (en) 2002-08-21

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US (1) US6250426B1 (en)
EP (1) EP0879210B1 (en)
AT (1) ATE222563T1 (en)
DE (1) DE69714837D1 (en)
FR (1) FR2744436B1 (en)
IL (1) IL125617A (en)
WO (1) WO1997029040A1 (en)

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Also Published As

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WO1997029040A1 (en) 1997-08-14
US6250426B1 (en) 2001-06-26
FR2744436B1 (en) 1998-03-13
ATE222563T1 (en) 2002-09-15
DE69714837D1 (en) 2002-09-26
FR2744436A1 (en) 1997-08-08
IL125617A (en) 2001-03-19
IL125617A0 (en) 1999-03-12
EP0879210A1 (en) 1998-11-25

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