WO2006048247A1 - Lift device which is intended, for example, to enable maintenance personnel to access different parts of an aircraft - Google Patents

Lift device which is intended, for example, to enable maintenance personnel to access different parts of an aircraft Download PDF

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Publication number
WO2006048247A1
WO2006048247A1 PCT/EP2005/011704 EP2005011704W WO2006048247A1 WO 2006048247 A1 WO2006048247 A1 WO 2006048247A1 EP 2005011704 W EP2005011704 W EP 2005011704W WO 2006048247 A1 WO2006048247 A1 WO 2006048247A1
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WO
WIPO (PCT)
Prior art keywords
mast
maintenance personnel
different parts
lift device
aircraft according
Prior art date
Application number
PCT/EP2005/011704
Other languages
French (fr)
Inventor
Aart Keijzer
Francis Lapre
Original Assignee
Reel
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Reel filed Critical Reel
Priority to EP05802818A priority Critical patent/EP1809534A1/en
Publication of WO2006048247A1 publication Critical patent/WO2006048247A1/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66FHOISTING, 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
    • B66F11/00Lifting devices specially adapted for particular uses not otherwise provided for
    • B66F11/04Lifting 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
    • B66F11/044Working platforms suspended from booms

Definitions

  • the invention relates to a lifting device.
  • the invention is directed to such a device, more particularly intended to allow maintenance personnel access to the different parts of an aircraft, the latter obviously being on the ground. It also applies to a device of the type in question, to allow the personnel in charge of the construction, and in general of any task in connection with the maintenance of an airplane to reach the different external places of the airplane, and more particularly, at the level of the empennage and the top of the wings and the fuselage.
  • H is well known in the field of maintenance of aircraft, including large aircraft, to implement telescopic platforms suspended by a mast to cranes, themselves positioned under the roof of maintenance hangars.
  • Such a device has for example been described in document FR-A-2 586240.
  • This type of device has the following advantages: comfortable access to any part of the aircraft by means of nacelles of large dimensions, and very stable; protection of the aircraft against mechanical shocks by means of on-board protection devices, of the detection buffer type, infrared cells, etc. ; possibility of rapid evacuation of the aircraft from the maintenance hangar: it is sufficient to do this to go up the platform in the up position, to allow the exit of the aircraft from said shed; kinematic chain of cartesian type in direction, translation and lifting and rotation of the nacelle around the axis of the mast, very comfortable to use.
  • such a device proves to be satisfactory, on the other hand, it proves to be of a high cost, often incompatible with the light aircraft maintenance.
  • a device involves the implementation of changes in the structure of the hangar and, in general, the Civil Engineering.
  • the implementation of such a device requires a carrier structure dimensioned accordingly, able to support such a mass.
  • a platform suspended from a roof is in fact captive, and can hardly move from one hangar to another, which requires to multiply the number of equipment.
  • this type of nacelle can be used outside a shed, except to build an external load-bearing structure, but in fact undergoing all the bad weather.
  • the scissor lifts are as stable as the pods at the end of a telescopic mast, and may in particular have a large platform, on the other hand, by design, they can only allow work to be done. Below horizontal structures or against vertical structures. Indeed, their configuration prevents them from accessing above such horizontal structures, such as in particular the horizontal stabilizer, the wings and the top of the fuselage of an aircraft.
  • Nacelles located at the end of a telescopic mast have a greater travel in terms of accessibility, but given the design of their kinematic chain, they must necessarily be small in size with a low payload.
  • the mast + nacelle assembly is relatively flexible and lacks stability, likely to tilt, and at least to present a dangling such that it can come into contact with areas of the aircraft and damage them .
  • the kinematic chain which moves the nacelle according to a system of polar coordinates is relatively uncomfortable for the user. Indeed, with such a system, it proves relatively difficult to perform movements of small amplitude with the nacelle when the telescopic mast is unfolded. Thus, a reduced angle of rotation generates a relatively large clearance of the nacelle, thereby causing significant risks of shocks with the structure to be maintained, and particularly with the aircraft, by contact between the column, the mast or the nacelle and the 'plane. In order to minimize the consequences of such shocks, it is conceivable to provide the nacelle with peripheral damping buffers. But unfortunately, these significantly increase the payload of the nacelle.
  • aerial work platforms by their mobility, confer increased flexibility to the user, on the other hand, they are limited in terms of applications by the design they implement.
  • the object of the present invention is to provide a lifting device, in particular intended to enable maintenance operations to be carried out, using an aerial platform, from the ground, which is better adapted to the various tasks, in particular maintenance tasks, of aircraft, than the aerial work platforms of the conventional type.
  • this lifting device in particular to allow maintenance personnel access to the different parts of an aircraft, comprises a mobile base or not, resting on the ground and provided with a vertical mast provided at its upper end. a nacelle, said nacelle being intended to allow the support of one or more persons intended to ensure in particular the maintenance.
  • the nacelle proper is mounted at the end of a multiple arm, with horizontal or vertical displacement, capable of unfolding and folding, the multiple arm being articulated in rotation with respect to the upper end. of the mast.
  • the radial movement of the nacelle with respect to the axis on which it is mounted is obtained by means of a compass, that is to say by means of at least two arms in a plane horizontal or vertical, articulated relative to each other at their common ends.
  • the other ends of said arms are respectively fixed at the mast and the nacelle itself.
  • the invention is declined according to different embodiments.
  • the mast is fixed and secured to the ground: the aircraft are moved accordingly in relation to the positioning of said mast, to allow accessibility to the area to be maintained, including the empennage.
  • This mast can also be telescopic, to reduce the size of the maintenance device.
  • the mast is mounted on a structure or mobile carriage, of appropriate size, for its movement within the various sheds capable of storing said aircraft, or outside, for maintenance interventions carried out directly on the tarmac of the airport.
  • the onboard mast is a telescopic mast, comprising a plurality of barrels that fit into each other, said barrels being capable of being deployed or otherwise retracted by means of least one telescopic type ve ⁇ n double-acting, i.e. capable 'to operate in compression and in tension.
  • the movement and retraction of the drums are performed by means of two or more sets of such double-acting cylinders. Indeed, in such a configuration, the overturning torque inherent in the nacelle and the multiple arm is resumed in tension compression by the multiple cylinders. In doing so, the guidance of the mast is not solicited, thereby to structurally lighten the mast itself and the guide means.
  • the vertical mast is fixed and permanently deployed.
  • the positioning of the multi-arm articulation ring on said mast according to the desired height or coast is achieved by guiding said crown to the mast by means of rollers, and the progression thereof along said mast is ensured by means of :
  • said crown may be provided with a motorized toothed pinion, capable of meshing with a vertical rack secured to the mast.
  • Figure 1 is a schematic representation illustrating the principle of operation of the device according to a first embodiment of the invention.
  • FIGS. 2 and 3 are diagrammatic representations in section of an embodiment of the invention in accordance with the principle implemented in connection with FIG.
  • FIG. 4 is a schematic representation of detail illustrating an intermediate zone of action of double-acting cylinders ensuring the unfolding and folding of the telescopic mast of FIGS. 2 and 3.
  • FIG. 5 is a schematic representation in section of the orientation ring with a rotation mechanism located at the upper end of the telescopic mast.
  • Figure 6 is a schematic representation illustrating the connection mode between the slewing ring and the telescopic mast.
  • Figures 7 to 10 are schematic representations illustrating different possible orientations of the nacelle according to the invention.
  • Figure 11 is a schematic representation illustrating the principle of operation of the device according to a second embodiment of the invention.
  • Figures 12 and 13 are schematic representations in section of an embodiment of the invention according to the principle implemented in connection with Figure 11, respectively in the deployed position and in the folded position.
  • Figure 14 schematically illustrates different possible orientations of the nacelle according to the second embodiment of the invention.
  • FIG. 1 illustrates, as already stated, the operating principle of the aerial platform device according to a first embodiment of the invention.
  • a support (1) intended to rest on the ground and confer stability to the assembly.
  • This stability can for example be obtained by solidarisa.'tion by any mechanical means of the support on the ground, or by deployment of a cecrtain number of removable feet (18) hinged to the support (1) (see Figures 7-10 and 14), and coming to bear on a perimeter greater than that of the support, thereby to give the entire device stability in the plane (XOY), that is to say in the horizontal plane.
  • Support audit (1) is secured a vertical mast (31), telescopic in the example described, may be deployed along the coast g indicated on FIG. 1.
  • the upper end of the mast has a vertical hinge axis (3), allowing the movement of a first arm (16) at the angle ⁇ l in a horizontal plane.
  • the other end of this first arm (16) is also provided with a vertical hinge pin (7) for the movement of a second arm (17) according to the eagle Q2 in a horizontal plane.
  • these two arms constitute the entity named in the following description and claims "compass".
  • the free end of said compass receives a nacelle (6) via a third axis of vertical articulation (5), giving the nacelle the possibility of irn deflection in a horizontal plane, at an angle ⁇ 3.
  • This figure 1 represents the different degrees of freedom conferred by the device according to the invention. Besides the z-side, one can observe the possibility of a movement based on cylindrical coordinates, and in particular the possible rotation of the compass + nacelle assembly (6) with respect to the telescopic mast (31) (coordinates ⁇ 1. ⁇ 2. ⁇ 3).
  • the nacelle (6) is likely to have an infinity of displacements, but whose amplitude and travel are much better controlled, because of the use of cylindrical coordinates, the boom lengths being much smaller than in the case of a polar displacement boat.
  • this nacelle (6) is very manageable by the implementation of three rotation mechanisms in the horizontal plane, respectively relative to the telescopic mast (31), relative to the vertical axis (7) to the junction of the devtx arms (16, 17) constituting the compass, and relative to the vertical axis (5) at the end of the arm.
  • This particular configuration makes it possible for the operator to present the basket in front of any of the zones of the aircraft, including in the upper zone of the empennage, whose access with the telescopic pods of the prior art was difficult. and dangerous.
  • the objective of the device of the invention is to confer such a nacelle, besides great ease of access to the various parts of the aircraft, also a certain stability.
  • it can be positioned at the upper end of a fixed vertical mast, ie secured to the ground for example in a maintenance hangar airline.
  • This mast can be rigid and monobloc or telescopic and include a number of drums, nestable into each other, and to reduce clutter.
  • a mobile structure on a carriage, possibly motorized, which can be moved within a single vehicle. hangar or maintenance hangar at another of these hangars, or even outside.
  • FIGS. 2 and 3 show a structure of this kind, respectively in the unfolded and folded position.
  • It basically comprises a carriage (1) mounted on at least three wheels (8), at least a portion of which is motorized, to allow the displacement of said structure.
  • the carriage is towed.
  • the carriage (1) is further provided with stabilizing arms (18) adapted to ensure the stability of the assembly in any position of the nacelle.
  • This carriage comprises a telescopic mast, consisting of a fixed and external shaft (10), and four movable drums (11, 12, 13, 14).
  • the cross section of each of these barrels is triangular in the example described, and its dimensions decrease from the fixed shaft (10) to the most extreme shaft (14).
  • the upper end of the barrel (14) receives a circularly oriented ring formed of an inner ring (22) and an outer ring (24).
  • the fixed outer ring (24) is secured to said was (14) via an intermediate support frame (15) and a cardan-type connection (9).
  • the inner ring (22) is secured to the first arm (16) of the compass.
  • the inner ring (22) is rotated by means of a gear motor actuating a toothed pinion (23), meshing with the inner side wall of said ring, also provided with teeth. This principle of rotation is well known to those skilled in the art, so there is no need to describe it here in more detail.
  • the compass consists of two arms, the first arm (16), mentioned above, is secured to the inner ring (22), and a second arm (17). These two arms are located in a horizontal plane, and are further articulated to each other with respect to a vertical axis (7).
  • this axis (7) is constituted by an orientation ring (not shown), operating on the same principle as that described above.
  • the free rextrémotti arm (17) also comprises a vertical axis (5) which is secured to the nacelle (6), again through an orientation ring.
  • the various mobile drums (11 - 14) are capable of being deployed under the action of two sets of three double-acting cylinders, respectively the lower cylinders (19) and the upper cylinders (20).
  • the three lower cylinders are secured to the movable carriage (1), as can be seen in Figure 2. Their upper end is secured to a horizontal interfacing flange (21), itself secured in the vicinity of the upper end of the second mobile shaft (12).
  • the second set of three double-acting cylinders (20) is secured to this interfacing flange (21), and corollary to the intermediate frame (15) which supports the outer ring (24) of the orientation ring, and therefore to the upper rextremity of the extreme mobile drum (14).
  • FIGS. 7 to 10 show different possible orientations of the nacelle in the horizontal plane with respect to the mast. It is thus possible to observe the great diversity of these orientations, making it possible in particular to optimize the areas of access of the nacelle, without risk of impact with elements of the fuselage, the wings, the drift or the empennage of the aircraft. .
  • FIG. 11 shows another embodiment of the invention. This is identical in principle to that described in relation to Figures 1 to 10, only differ the direction of movement of the compass.
  • said compass still consisting of two arms, has a deflection either in a horizontal plane, but in a vertical plane.
  • the arm (16) is capable of being articulated, in addition to the articulation described above, with respect to a horizontal axis (4), so as to allow it to have an angular deflection ⁇ l.
  • the arms (16) and (17) are further articulated relative to each other at a hinge axis (7), also horizontal, giving them the faculty of angular deflection ⁇ 2.
  • the nacelle positioned at the free end of the arm (17), still articulated around a vertical axis (5) conferring on it the faculty of an angular displacement ⁇ 3 is provided with a second articulation around a horizontal axis (27) provided at said end of said arm (17), conferring on it the faculty of an angular displacement £ (3.
  • FIGS. 12 and 13 there is shown such a variant, respectively in the unfolded position and in the folded position.
  • the angular deflections in a horizontal plane are identical to those described in the basic variant.
  • the deflections intervening in a vertical plane are realized by means of jacks, respectively (28) between the support (2) of the compass and the arm (16), (29) between the arm (16). ) and the arm (17), and (30) between the arm (17) and the nacelle (6).
  • the operating principle of the device of the invention remains identical to that previously described.
  • the three possible rotational movements namely the nacelle about the axis (5), the compass about the axis (3), and the spacing of said compass, that this spacing intervenes in a horizontal plane or vertical, are enslaved and managed by a programmed logic, thus allowing to give the nacelle a linear movement, more intuitive for the user.
  • This management by logic and microcomputer allows to regulate:
  • the nacelle and the compass are also advantageously provided with shock absorbing means, themselves equipped with detectors, generating the immediate stop movement in case of detection of a shock.
  • said nacelle can itself be provided with a lifting means, consisting of an onboard bracket, to allow to deposit the ground and take elements of the aircraft to ensure maintenance, such as by example of the components of the drift, empennage, fuselage, engines, etc.
  • the device according to the invention has a number of advantages, among which may be mentioned;

Abstract

The invention relates to a lift device which is intended, for example, to enable maintenance personnel to access different parts of an aircraft. The inventive device comprises a mobile or non-mobile support base (1) which rests on the ground and which is equipped with a vertical pole (3). According to the invention, a bucket (6) is mounted close to the upper end of the pole and is intended to support one or more individuals working on the aircraft. The aforementioned bucket (6) is mounted to the end of a multiple arm (16, 17) which can be folded and unfolded and which is rotatably hinged in relation to the upper end of the pole (31).

Description

DISPOSITIF ÉLÉVATEUR, NOTAMMENT POUR PERMETTRE L'ACCÈS DU PERSONNEL DELIFT DEVICE, IN PARTICULAR FOR ENABLING STAFF ACCESS
MAINTENANCE AUX DIFFERENTES PARTIES D'UN AVIONMAINTENANCE TO DIFFERENT PARTS OF AN AIRCRAFT
DOMAINE DE L'INVENTIONFIELD OF THE INVENTION
L'invention concerne un dispositif élévateur. L'invention vise un tel dispositif, plus particulièrement destiné à permettre l'accès du personnel de maintenance aux différentes parties d'un avion, ce dernier étant bien évidemment au sol. Elle vise également un dispositif du type en question, pour permettre au personnel chargé de la construction, et de manière générale de toute tâche en relation avec l'entretien d'un avion d'accéder aux différents lieux extérieurs de l'avion, et plus particulièrement, au niveau de l'empennage et du dessus des ailes et du fuselage.The invention relates to a lifting device. The invention is directed to such a device, more particularly intended to allow maintenance personnel access to the different parts of an aircraft, the latter obviously being on the ground. It also applies to a device of the type in question, to allow the personnel in charge of the construction, and in general of any task in connection with the maintenance of an airplane to reach the different external places of the airplane, and more particularly, at the level of the empennage and the top of the wings and the fuselage.
ETATANTÉRIEURDELATECHNIQUEETATANTÉRIEURDELATECHNIQUE
H est bien connu dans le domaine de la maintenance des avions, notamment des avions gros porteurs, de mettre en œuvre des nacelles télescopiques suspendues par un mât à des ponts roulants, eux-mêmes positionnés sous le toit des hangars de maintenance. On a par exemple décrit un tel dispositif dans le document FR- A-2 586240.H is well known in the field of maintenance of aircraft, including large aircraft, to implement telescopic platforms suspended by a mast to cranes, themselves positioned under the roof of maintenance hangars. Such a device has for example been described in document FR-A-2 586240.
Ce type de dispositif présente les avantages suivants : accès confortable à toute partie de l'avion par le biais de nacelles de grandes dimensions, et très stables ; protection de l'avion vis à vis des chocs mécaniques au moyen de dispositifs de protection embarqués, du type tampon de détection, cellules infrarouges, etc. ; possibilité d'une évacuation rapide de l'avion hors du hangar de maintenance : il suffit pour ce faire de remonter la nacelle en position haute, afin de permettre la sortie de l'avion dudit hangar ; chaîne cinématique du type cartésien en direction, translation et levage et rotation de la nacelle autour de l'axe du mât, très confortable d'utilisation.This type of device has the following advantages: comfortable access to any part of the aircraft by means of nacelles of large dimensions, and very stable; protection of the aircraft against mechanical shocks by means of on-board protection devices, of the detection buffer type, infrared cells, etc. ; possibility of rapid evacuation of the aircraft from the maintenance hangar: it is sufficient to do this to go up the platform in the up position, to allow the exit of the aircraft from said shed; kinematic chain of cartesian type in direction, translation and lifting and rotation of the nacelle around the axis of the mast, very comfortable to use.
Si, sur le plan de la fonctionnalité des conditions de travail, un tel dispositif s'avère satisfaisant, en revanche, il s'avère d'un coût élevé, souvent incompatible avec la maintenance légère d'avions. En effet, un tel dispositif suppose la mise en œuvre de modifications de la structure du hangar et, de manière générale, du Génie Civil. Parallèlement, la mise en œuvre d'un tel dispositif nécessite une structure porteuse dimensionnée en conséquence, propre à pouvoir supporter une telle masse. Enfin, une nacelle suspendue à un toit se trouve de fait captive, et peut difficilement passer d'un hangar à un autre, ce qui impose de multiplier le nombre d'équipements. En outre, ce type de nacelle ne peut être utilisée en dehors d'un hangar, sauf à construire une structure porteuse extérieure, mais subissant de fait toutes les intempéries.If, in terms of the functionality of the working conditions, such a device proves to be satisfactory, on the other hand, it proves to be of a high cost, often incompatible with the light aircraft maintenance. Indeed, such a device involves the implementation of changes in the structure of the hangar and, in general, the Civil Engineering. In parallel, the implementation of such a device requires a carrier structure dimensioned accordingly, able to support such a mass. Finally, a platform suspended from a roof is in fact captive, and can hardly move from one hangar to another, which requires to multiply the number of equipment. In addition, this type of nacelle can be used outside a shed, except to build an external load-bearing structure, but in fact undergoing all the bad weather.
On a donc proposé, pour remplir la même fonction, des nacelles élévatrices susceptibles d'être montées sur un chariot roulant sur le sol. Une telle nacelle a par exemple été décrite dans le document US-A-5 307 898. La nacelle proprement dite est située soit à l'extrémité de ciseaux, dépliables et repliables en hauteur, soit à l'extrémité d'un mât télescopique, éventuellement inclinable.It has therefore been proposed, to fulfill the same function, aerial platforms that can be mounted on a rolling cart on the ground. Such a nacelle has for example been described in US-A-5 307 898. The nacelle itself is located either at the end of scissors, foldable and foldable in height, or at the end of a telescopic mast, possibly tilting.
Si les nacelles à ciseaux sont aussi stables que les nacelles situées à l'extrémité d'un mât télescopique, et peuvent notamment présenter une plate-forme de grandes dimensions, en revanche, de par leur conception, elles ne peuvent permettre de travailler qu'en dessous de structures horizontales ou contre des structures verticales. En effet, leur configuration leur interdit l'accès au dessus de telles structures horizontales, telles que notamment l'empennage horizontal, les ailes et le dessus du fuselage d'un avion.If the scissor lifts are as stable as the pods at the end of a telescopic mast, and may in particular have a large platform, on the other hand, by design, they can only allow work to be done. below horizontal structures or against vertical structures. Indeed, their configuration prevents them from accessing above such horizontal structures, such as in particular the horizontal stabilizer, the wings and the top of the fuselage of an aircraft.
Les nacelles situées à l'extrémité d'un mât télescopique présentent un plus grand débattement en termes d'accessibilité, mais compte-tenu de la conception de leur chaîne cinématique, elles doivent nécessairement être de petites dimensions avec une charge utile faible.Nacelles located at the end of a telescopic mast have a greater travel in terms of accessibility, but given the design of their kinematic chain, they must necessarily be small in size with a low payload.
En outre, l'ensemble mât + nacelle est relativement souple et manque de stabilité, susceptible ainsi de basculer, et à tout le moins, de présenter un ballant tel qu'il peut entrer en contact avec des zones de l'avion et les endommager.In addition, the mast + nacelle assembly is relatively flexible and lacks stability, likely to tilt, and at least to present a dangling such that it can come into contact with areas of the aircraft and damage them .
Enfin, la chaîne cinématique qui déplace la nacelle selon un système de coordonnées polaires, est relativement inconfortable pour l'utilisateur. En effet, avec un tel système, il s'avère relativement difficile d'effectuer des mouvements de faibles amplitudes avec la nacelle lorsque le mât télescopique est déplié. Ainsi, un angle de rotation réduit génère un débattement relativement grand de la nacelle, entraînant de fait des risques importants de chocs avec la structure à maintenir, et notamment avec l'avion, par contact entre la colonne, le mât ou la nacelle et l'avion. Afin de minimiser les conséquences de tels chocs, il est envisageable de munir la nacelle de tampons amortisseurs périphériques. Mais malheureusement, ceux-ci grèvent de manière importante la charge utile de la nacelle.Finally, the kinematic chain which moves the nacelle according to a system of polar coordinates, is relatively uncomfortable for the user. Indeed, with such a system, it proves relatively difficult to perform movements of small amplitude with the nacelle when the telescopic mast is unfolded. Thus, a reduced angle of rotation generates a relatively large clearance of the nacelle, thereby causing significant risks of shocks with the structure to be maintained, and particularly with the aircraft, by contact between the column, the mast or the nacelle and the 'plane. In order to minimize the consequences of such shocks, it is conceivable to provide the nacelle with peripheral damping buffers. But unfortunately, these significantly increase the payload of the nacelle.
Enfin, on a également proposé de munir l'ensemble de systèmes de détection optiques, ménagés le long du mât télescopique. Cependant, de tels systèmes s'avèrent inopérants en raison de la trop grande souplesse du mât télescopique, notamment pour des mâts de grande dimension, de sorte que le temps de réponse consécutif à la détection d'un obstacle, aussi court soit-il, n'empêche pas le choc entre le mât, voire la nacelle et l'avion.Finally, it has also been proposed to provide the set of optical detection systems, arranged along the telescopic mast. However, such systems are ineffective because of the excessive flexibility of the telescopic mast, especially for large masts, so that the response time resulting from the detection of an obstacle, as short as it may be, does not prevent the impact between the mast or the basket and the plane.
En résumé, si de telles nacelles élévatrices, de par leur mobilité, confèrent une souplesse accrue à l'utilisateur, en revanche, elles s'avèrent limitées en termes d'applications de par la conception qu'elles mettent en œuvre.In summary, if such aerial work platforms, by their mobility, confer increased flexibility to the user, on the other hand, they are limited in terms of applications by the design they implement.
DESCRIPTION SOMMAIRE DE L'INVENTIONSUMMARY DESCRIPTION OF THE INVENTION
L'objet de la présente invention vise un dispositif élévateur, notamment destiné à permettre de réaliser des opérations de maintenance, mettant en œuvre une nacelle élévatrice, depuis le sol, mieux adaptée aux différentes tâches, de maintenance notamment, d'avions, que les nacelles élévatrices de type classique.The object of the present invention is to provide a lifting device, in particular intended to enable maintenance operations to be carried out, using an aerial platform, from the ground, which is better adapted to the various tasks, in particular maintenance tasks, of aircraft, than the aerial work platforms of the conventional type.
Selon l'invention, ce dispositif élévateur, pour permettre notamment l'accès du personnel de maintenance aux différentes parties d'un avion, comprend une base mobile ou non, reposant sur le sol et pourvue d'un mât vertical muni à son extrémité supérieure d'une nacelle, ladite nacelle étant destinée à permettre le support d'une ou plusieurs personnes destinées à assurer notamment la maintenance.According to the invention, this lifting device, in particular to allow maintenance personnel access to the different parts of an aircraft, comprises a mobile base or not, resting on the ground and provided with a vertical mast provided at its upper end. a nacelle, said nacelle being intended to allow the support of one or more persons intended to ensure in particular the maintenance.
Selon l'invention, la nacelle proprement dite est montée à l'extrémité d'un bras multiple, à débattement horizontal ou vertical, susceptible de se déplier et de se replier, le bras multiple étant articulé en rotation par rapport à l'extrémité supérieure du mât.According to the invention, the nacelle proper is mounted at the end of a multiple arm, with horizontal or vertical displacement, capable of unfolding and folding, the multiple arm being articulated in rotation with respect to the upper end. of the mast.
Par dépliage et repliage du bras multiple, on entend au sens de l'invention la faculté que présente ledit bras de se replier sur lui-même, en raison de l'articulation des éléments qui le constituent, à l'instar d'un compas, et son corollaire, l'écartement desdits éléments l'un de l'autre, toujours à l'instar d'un compas. Ce faisant, outre les avantages inhérents au concept des nacelles dites élévatrices, mentionnées précédemment, on confère à celles-ci la possibilité d'un déplacement basé sur une cinématique à coordonnées cylindriques : levage vertical et rotation autour de l'axe vertical + déplacement radial voire rotation de la nacelle sur elle-même. Un tel déplacement s'avère beaucoup plus confortable pour l'utilisateur, notamment en termes de risques de collision entre la nacelle et/ou le mât qui la supporte et la structure à maintenir, telle qu'un avion.By unfolding and folding the multiple arm is meant in the sense of the invention the faculty of the said arm to fold on itself, because of the articulation of the elements that constitute it, like a compass , and its corollary, the spacing of said elements from one another, always like a compass. In doing so, in addition to the advantages inherent in the concept of so-called lift nacelles mentioned above, they are given the possibility of a displacement based on kinematics with cylindrical coordinates: vertical lifting and rotation about the vertical axis + radial displacement even rotation of the nacelle on itself. Such a displacement is much more comfortable for the user, especially in terms of the risk of collision between the nacelle and / or the mast that supports it and the structure to maintain, such as an aircraft.
Selon l'invention, le mouvement radial de la nacelle par rapport à l'axe sur lequel elle est montée, est obtenu au moyen d'un compas, c'est à dire au moyen d'au moins deux bras à débattement dans un plan horizontal ou vertical, articulés l'un par rapport à l'autre au niveau de leurs extrémités communes. Les autres extrémités desdits bras sont respectivement fixées au niveau du mât et à la nacelle proprement dite.According to the invention, the radial movement of the nacelle with respect to the axis on which it is mounted, is obtained by means of a compass, that is to say by means of at least two arms in a plane horizontal or vertical, articulated relative to each other at their common ends. The other ends of said arms are respectively fixed at the mast and the nacelle itself.
L'invention se décline selon différentes formes de réalisation.The invention is declined according to different embodiments.
Selon l'une d'elles, le mât est fixe et solidarisé au sol : les avions sont déplacés en conséquence en relation avec le positionnement dudit mât, afin de permettre l'accessibilité à la zone à maintenir, et notamment à l'empennage. Ce mât peut également être télescopique, afin de réduire l'encombrement du dispositif de maintenance.According to one of them, the mast is fixed and secured to the ground: the aircraft are moved accordingly in relation to the positioning of said mast, to allow accessibility to the area to be maintained, including the empennage. This mast can also be telescopic, to reduce the size of the maintenance device.
Selon une autre forme de réalisation, le mât est monté sur une structure ou chariot mobile, de gabarit approprié, en vue de son déplacement au sein des différents hangars susceptibles de stocker lesdits avions, voire à l'extérieur, pour des interventions de maintenance réalisées directement sur le tarmac de l'aéroport.According to another embodiment, the mast is mounted on a structure or mobile carriage, of appropriate size, for its movement within the various sheds capable of storing said aircraft, or outside, for maintenance interventions carried out directly on the tarmac of the airport.
Selon une forme de réalisation de l'invention, le mât embarqué est un mât télescopique, comportant une pluralité de fûts venant s'emboîter les uns dans les autres, lesdits fûts étant susceptibles d'être déployés ou au contraire escamotés au moyen d'au moins un veπn de type télescopique à doublé effet, c'est à dire susceptible' de fonctionner en compression et en traction. Avantageusement, le déployage et l'escamotage des fûts sont réalisés au moyen de deux ou de plusieurs jeux de tels vérins double-effet. En effet, dans une telle configuration, le couple de renversement inhérent à la nacelle et au bras multiple est repris en traction compression par les vérins multiples. Ce faisant, le guidage du mât n'est pas sollicité, permettant de la sorte d'alléger structurellement le mât proprement dit et les moyens de guidage.According to one embodiment of the invention, the onboard mast is a telescopic mast, comprising a plurality of barrels that fit into each other, said barrels being capable of being deployed or otherwise retracted by means of least one telescopic type veπn double-acting, i.e. capable 'to operate in compression and in tension. Advantageously, the movement and retraction of the drums are performed by means of two or more sets of such double-acting cylinders. Indeed, in such a configuration, the overturning torque inherent in the nacelle and the multiple arm is resumed in tension compression by the multiple cylinders. In doing so, the guidance of the mast is not solicited, thereby to structurally lighten the mast itself and the guide means.
Dans une variante, le mât vertical est fixe et en permanence déployé. Le positionnement de la couronne d'articulation du bras multiple sur ledit mât selon la hauteur ou côte souhaitée est réalisé par guidage de ladite couronne sur le mât par Pintermédiaire de galets, et la progression de celle-ci le long dudit mât est assurée au moyen :In a variant, the vertical mast is fixed and permanently deployed. The positioning of the multi-arm articulation ring on said mast according to the desired height or coast is achieved by guiding said crown to the mast by means of rollers, and the progression thereof along said mast is ensured by means of :
• d'un câble motorisé monté en boucle entre deux poulies, respectivement supérieure et inférieure ; • ou d'un vérin ;• a motorized cable looped between two pulleys, respectively upper and lower; • or a jack;
• ou tout moyen de levage traditionnel.• or any traditional lifting means.
Dans le même esprit, ladite couronne peut être munie d'un pignon denté motorisé, susceptible de venir engrener sur une crémaillère verticale solidarisée au mât.In the same spirit, said crown may be provided with a motorized toothed pinion, capable of meshing with a vertical rack secured to the mast.
BRÈVE DESCRIPTION DES DESSINSBRIEF DESCRIPTION OF THE DRAWINGS
La manière dont l'invention peut être réalisée et les avantages qui en découlent ressortiront mieux de l'exemple de réalisation qui suit donné à titre indicatif et non limitatif, à l'appui des figures annexées.The manner in which the invention can be implemented and the advantages that result therefrom will emerge more clearly from the exemplary embodiment which follows given by way of indication and not by way of limitation, in support of the appended figures.
La figure 1 est une représentation schématique illustrant le principe de fonctionnement du dispositif conforme à une première forme de réalisation de l'invention.Figure 1 is a schematic representation illustrating the principle of operation of the device according to a first embodiment of the invention.
Les figures 2 et 3 sont des représentations schématiques en section d'un mode de réalisation de l'invention conforme au principe mis en œuvre en relation avec la figureFIGS. 2 and 3 are diagrammatic representations in section of an embodiment of the invention in accordance with the principle implemented in connection with FIG.
I5 respectivement en position déployée efen position repliée.I 5 respectively efen folded position deployed position.
La figure 4 est une représentation schématique de détail illustrant une zone intermédiaire d'action de vérins double effets assurant le dépliement et le repliement du mât télescopique des figures 2 et 3. La figure 5 est une représentation schématique en section de la couronne d'orientation avec un mécanisme de rotation situé à l'extrémité supérieure du mât télescopique. La figure 6 est une représentation schématique illustrant le mode de liaison entre la couronne d'orientation et le mât télescopique.FIG. 4 is a schematic representation of detail illustrating an intermediate zone of action of double-acting cylinders ensuring the unfolding and folding of the telescopic mast of FIGS. 2 and 3. FIG. 5 is a schematic representation in section of the orientation ring with a rotation mechanism located at the upper end of the telescopic mast. Figure 6 is a schematic representation illustrating the connection mode between the slewing ring and the telescopic mast.
Les figures 7 à 10 sont des représentations schématiques illustrant différentes orientations possibles de la nacelle conforme à l'invention. La figure 11 est une représentation schématique illustrant le principe de fonctionnement du dispositif conforme à une seconde fornxe de réalisation de l'invention.Figures 7 to 10 are schematic representations illustrating different possible orientations of the nacelle according to the invention. Figure 11 is a schematic representation illustrating the principle of operation of the device according to a second embodiment of the invention.
Les figures 12 et 13 sont des représentations schématiques en section d'un mode de réalisation de l'invention conforme au principe mis en œuvre en relation avec la figure 11, respectivement en position déployée et en position repliée.Figures 12 and 13 are schematic representations in section of an embodiment of the invention according to the principle implemented in connection with Figure 11, respectively in the deployed position and in the folded position.
La figure 14 illustre schématiquement différentes orientations possibles de la nacelle conforme à la seconde forme de réalisation de l'invention.Figure 14 schematically illustrates different possible orientations of the nacelle according to the second embodiment of the invention.
DESCRIPTION DÉTAILLÉE DE L'INVENTIONDETAILED DESCRIPTION OF THE INVENTION
La figure 1 illustre comme déjà dit le principe de fonctionneπnent du dispositif de nacelle élévatrice conforme à un premier mode de réalisation de l'invention.FIG. 1 illustrates, as already stated, the operating principle of the aerial platform device according to a first embodiment of the invention.
Fondamentalement, et dans la forme de réalisation décrite mettant en œuvre un mât télescopique, celle-ci comporte un support (1), destiné à reposer sur le sol et à conférer la stabilité à l'ensemble.Basically, and in the embodiment described using a telescopic mast, it comprises a support (1) intended to rest on the ground and confer stability to the assembly.
Cette stabilité peut par exemple être obtenue par solidarisa.'tion par tout moyen mécanique du support au sol, ou encore par déploiement d'un cecrtain nombre de pieds amovibles (18), articulés sur le support (1) (voir figures 7-10 et 14) , et venant prendre appui selon un périmètre supérieur à celui du support, pour ainsi conférer à l'ensemble du dispositif la stabilité dans le plan (X-O-Y), c'est à dire dans le plan horizontal.This stability can for example be obtained by solidarisa.'tion by any mechanical means of the support on the ground, or by deployment of a cecrtain number of removable feet (18) hinged to the support (1) (see Figures 7-10 and 14), and coming to bear on a perimeter greater than that of the support, thereby to give the entire device stability in the plane (XOY), that is to say in the horizontal plane.
Audit support (1) est solidarisé un mât vertical (31), télescopique dans l'exemple décrit, susceptible de se déployer selon la côte g indiquée sur ladrte figure 1.Support audit (1) is secured a vertical mast (31), telescopic in the example described, may be deployed along the coast g indicated on FIG. 1.
L'extrémité supérieure du mât comporte un axe d'articulation vertical (3), permettant le débattement d'un premier bras (16) selon l'angle θl dans un plan horizontal. L'autre extrémité de ce premier bras (16) est également munie d'un axe d'articulation vertical (7) permettant le débattement d'un second bras (17) selon l'aaigle Q2 dans un plan horizontal. En l'espèce, ces deux bras constituent l'entité dénommée dans la suite de la description et des revendications « compas ». L'extrémité libre dudit compas reçoit une nacelle (6) par l'intermédiaire d'un troisième axe d'articulation vertical (5), conférant à la nacelle la possibilité d'irn débattement dans un plan horizontal, selon un angle Θ3.The upper end of the mast has a vertical hinge axis (3), allowing the movement of a first arm (16) at the angle θl in a horizontal plane. The other end of this first arm (16) is also provided with a vertical hinge pin (7) for the movement of a second arm (17) according to the eagle Q2 in a horizontal plane. In the present case, these two arms constitute the entity named in the following description and claims "compass". The free end of said compass receives a nacelle (6) via a third axis of vertical articulation (5), giving the nacelle the possibility of irn deflection in a horizontal plane, at an angle Θ3.
On a symbolisé sur cette figure 1, les différents degrés de liberté conférés par le dispositif conforme à l'invention. Outre la côte z, on peut observer ainsi la possibilité d'un mouvement basé sur des coordonnées cylindriques, et notamment la possible rotation de l'ensemble compas + nacelle (6) par rapport au mât télescopique (31) (coordonnées Θ1. Θ2. Θ3).This figure 1 represents the different degrees of freedom conferred by the device according to the invention. Besides the z-side, one can observe the possibility of a movement based on cylindrical coordinates, and in particular the possible rotation of the compass + nacelle assembly (6) with respect to the telescopic mast (31) (coordinates Θ1. Θ2. Θ3).
Aussi, de par la mise en œuvre de ces différents éléments, la nacelle (6) est susceptible de présenter une infinité de déplacements, mais dont l'amplitude et le débattement sont beaucoup mieux maîtrisés, en raison de l'utilisation de coordonnées cylindriques, les longueurs de flèche étant beaucoup plus petites que dans le cadre d'une nacelle à déplacement polaire.Also, by the implementation of these different elements, the nacelle (6) is likely to have an infinity of displacements, but whose amplitude and travel are much better controlled, because of the use of cylindrical coordinates, the boom lengths being much smaller than in the case of a polar displacement boat.
En outre, cette nacelle (6) s'avère très maniable de par la mise en oeuvre de trois mécanismes de rotation dans le plan horizontal, respectivement par rapport au mât télescopique (31), par rapport à l'axe vertical (7) à la jonction des devtx bras (16, 17) constitutifs du compas, et par rapport à l'axe vertical (5) situé en bout du bras.In addition, this nacelle (6) is very manageable by the implementation of three rotation mechanisms in the horizontal plane, respectively relative to the telescopic mast (31), relative to the vertical axis (7) to the junction of the devtx arms (16, 17) constituting the compass, and relative to the vertical axis (5) at the end of the arm.
Cette configuration particulière permet à l'opérateur de présenter la nacelle devant n'importe laquelle des zones de l'avion, y compris en zone supérieure de l'empennage, dont l'accès avec les nacelles télescopiques de l'art antérieur, était difficile et dangereux.This particular configuration makes it possible for the operator to present the basket in front of any of the zones of the aircraft, including in the upper zone of the empennage, whose access with the telescopic pods of the prior art was difficult. and dangerous.
Ainsi que déjà mentionné, l'objectif du dispositif de l'invention est de conférer à une telle nacelle, outre une grande facilité d'accès aux différentes parties de l'avion, également une certaine stabilité.As already mentioned, the objective of the device of the invention is to confer such a nacelle, besides great ease of access to the various parts of the aircraft, also a certain stability.
Aussi, et dans une autre forme de réalisation de l' invention non représentée, celle-ci peut elle être positionnée à l'extrémité supérieure d'un mât vertical fixe, c'est à dire solidarisé au sol par exemple dans un hangar de maintenance d'avion.Also, and in another embodiment of the invention not shown, it can be positioned at the upper end of a fixed vertical mast, ie secured to the ground for example in a maintenance hangar airline.
Ce mât peut être rigide et monobloc ou télescopique et comprendre un certain nombre de fûts, emboîtables les uns dans les autres, et ce afin de réduire l'encombrement. Cependant, on comprendra que dans un souci d'optimisation et de rationalisation des coûts, il pourra être préféré la mise en œuvre d'une structure mobile sur un chariot, le cas échéant motorisé, susceptible d'être déplacé au sein d'un même hangar ou d'un hangar de maintenance à un autre de ces hangars, voire à l'extérieur.This mast can be rigid and monobloc or telescopic and include a number of drums, nestable into each other, and to reduce clutter. However, it will be understood that for the sake of optimization and rationalization of costs, it may be preferred to implement a mobile structure on a carriage, possibly motorized, which can be moved within a single vehicle. hangar or maintenance hangar at another of these hangars, or even outside.
II va ainsi être décrit une telle forme de réalisation de l'invention. Selon celle-ci, on comprendra qu'il est judicieux de prévoir un mât télescopique et non un mât fixe pour permettre les différents déplacements de la structure en question.It will thus be described such an embodiment of the invention. According to the latter, it will be understood that it is advisable to provide a telescopic mast and not a fixed mast to allow the various movements of the structure in question.
On a ainsi représenté en relation avec les figures 2 et 3 une telle structure, respectivement en position dépliée et en position repliée.FIGS. 2 and 3 show a structure of this kind, respectively in the unfolded and folded position.
Celle-ci comporte fondamentalement un chariot (1) monté sur au moins trois roues (8), dont une partie au moins est motorisée, afin de permettre le déplacement de ladite structure. On peut cependant parfaitement concevoir, sans se départir de l'esprit de l'invention, que ce chariot soit tracté.It basically comprises a carriage (1) mounted on at least three wheels (8), at least a portion of which is motorized, to allow the displacement of said structure. However, it is perfectly conceivable, without departing from the spirit of the invention, that the carriage is towed.
Le chariot (1) est en outre muni de bras stabilisateurs (18) propres à assurer la stabilité de l'ensemble en toute position de la nacelle.The carriage (1) is further provided with stabilizing arms (18) adapted to ensure the stability of the assembly in any position of the nacelle.
Ce chariot comporte un mât télescopique, constitué d'un fût fixe et externe (10), et de quatre fûts mobiles (11, 12, 13, 14). La section transversale des chacun de ces fûts est triangulaire dans l'exemple décrit, et ses dimensions décroissent du fût fixe (10) au fût le plus extrême (14).This carriage comprises a telescopic mast, consisting of a fixed and external shaft (10), and four movable drums (11, 12, 13, 14). The cross section of each of these barrels is triangular in the example described, and its dimensions decrease from the fixed shaft (10) to the most extreme shaft (14).
L'extrémité supérieure du fût (14) reçoit une couronne d'orientation circulaire formée d'une bague intérieure (22) et d'une bague extérieure (24). La bague extérieure fixe (24) est solidarisée audit fut (14) par l'intermédiaire d'un châssis support intermédiaire (15) et d'une liaison de type cardan (9). Corollairement, la bague intérieure (22) est solidarisée au premier bras (16) du compas. La bague intérieure (22) est mue en rotation au moyen d'un moto-réducteur actionnant un pignon denté (23), venant engrener dans la paroi latérale interne de ladite bague, pourvue également de dents. Ce principe de rotation est bien connu de l'homme de métier, de sorte qu'il n'y a pas lieu de le décrire ici plus en détail. Le compas est constitué de deux bras, le premier bras (16), mentionné précédemment, est solidarisé à la bague intérieure (22), et un second bras (17). Ces deux bras sont situés dans un plan horizontal, et sont en outre articulés entre eux par rapport à un axe (7) vertical. De fait, cet axe (7) est constitué par une couronne d'orientation (non représentée), fonctionnant selon le même principe que celle décrite précédemment.The upper end of the barrel (14) receives a circularly oriented ring formed of an inner ring (22) and an outer ring (24). The fixed outer ring (24) is secured to said was (14) via an intermediate support frame (15) and a cardan-type connection (9). As a corollary, the inner ring (22) is secured to the first arm (16) of the compass. The inner ring (22) is rotated by means of a gear motor actuating a toothed pinion (23), meshing with the inner side wall of said ring, also provided with teeth. This principle of rotation is well known to those skilled in the art, so there is no need to describe it here in more detail. The compass consists of two arms, the first arm (16), mentioned above, is secured to the inner ring (22), and a second arm (17). These two arms are located in a horizontal plane, and are further articulated to each other with respect to a vertical axis (7). In fact, this axis (7) is constituted by an orientation ring (not shown), operating on the same principle as that described above.
Enfin, rextrémité libre du bras (17) comporte également un axe vertical (5) auquel est solidarisée la nacelle (6), encore par le biais d'une couronne d'orientation.Finally, the free rextrémité arm (17) also comprises a vertical axis (5) which is secured to the nacelle (6), again through an orientation ring.
On aboutit ainsi à la possibilité de mouvement de rotation respectif de la nacelle par rapport au compas, du compas lui-même par rapport au mât (10 à 14), et de la variation de l'écartement du compas dans un plan horizontal, susceptible d'offrir à l'utilisateur une grande variété de positionnements de la nacelle dans un même plan horizontal.This results in the possibility of respective rotational movement of the nacelle relative to the compass, the compass itself relative to the mast (10 to 14), and the variation of the compass spacing in a horizontal plane, susceptible to offer the user a wide variety of positioning of the nacelle in the same horizontal plane.
Selon l'invention, les différents fûts mobiles (11 - 14) sont susceptibles de se déployer sous l'action de deux jeux de trois vérins double effets, respectivement des vérins inférieurs (19) et des vérins supérieurs (20).According to the invention, the various mobile drums (11 - 14) are capable of being deployed under the action of two sets of three double-acting cylinders, respectively the lower cylinders (19) and the upper cylinders (20).
Les trois vérins inférieurs sont solidarisés au chariot mobile (1), tel qu'on peut bien l'observer sur la figure 2. Leur extrémité supérieure est solidarisée à une bride horizontale d'interfaçage (21), elle-même solidarisée au voisinage de l'extrémité supérieure du second fût mobile (12).The three lower cylinders are secured to the movable carriage (1), as can be seen in Figure 2. Their upper end is secured to a horizontal interfacing flange (21), itself secured in the vicinity of the upper end of the second mobile shaft (12).
Le second jeu de trois vérins double-effets (20) est solidarisé à cette bride d'interfaçage (21), et corollairement au châssis intermédiaire (15) qui supporte la bague extérieure (24) de la couronne d'orientation, et donc au voisinage de rextrémité supérieure du fût mobile extrême (14).The second set of three double-acting cylinders (20) is secured to this interfacing flange (21), and corollary to the intermediate frame (15) which supports the outer ring (24) of the orientation ring, and therefore to the upper rextremity of the extreme mobile drum (14).
La liaison mécanique entre le dernier fût mobile (14) et le châssis intermédiaire (15) est réalisée au moyen d'une bride articulée de type cardan" "(9), ainsi que cela Iψpàfàîf très distinctement sur la figure 6. De par ce mode de fixation, on libère deux degrés de liberté dans le sens du basculement, mais en revanche, toute rotation de ladite couronne par rapport aux fûts est rendue impossible. Les vérins (19) et (20) étant à double effets, ils confèrent à l'ensemble et notamment à la partie supérieure de la structure constituée par le compas et la nacelle (6) la stabilité recherchée, nonobstant le porte à faux engendré par la nacelle. En effet, et ainsi que déjà mentionné, le couple de renversement inhérent à la nacelle et au compas est entièrement repris par des efforts de traction-compression dans lesdits vérins.The mechanical connection between the last mobile barrel (14) and the intermediate frame (15) is performed by means of an articulated cardan flange type "" (9), as will Iψpàfàîf very distinctly in Figure 6. By this fixation mode, it releases two degrees of freedom in the direction of tilting, but on the other hand, any rotation of said crown relative to the barrels is made impossible. The cylinders (19) and (20) being double-acting, they give the assembly and especially the upper part of the structure constituted by the compass and the nacelle (6) the desired stability, notwithstanding the overhang generated by Platform. Indeed, and as already mentioned, the overturning torque inherent in the nacelle and the compass is entirely taken up by traction-compression efforts in said cylinders.
On a représenté en relation avec les figures 7 à 10 différentes orientations possibles de la nacelle dans le plan horizontal par rapport au mât. On peut ainsi observer la grande diversité de ces orientations, permettant notamment d'optimiser les zones d'accès de la nacelle, sans risque de choc avec des éléments du fuselage, des ailes, de la dérive ou de l'empennage de l'avion.FIGS. 7 to 10 show different possible orientations of the nacelle in the horizontal plane with respect to the mast. It is thus possible to observe the great diversity of these orientations, making it possible in particular to optimize the areas of access of the nacelle, without risk of impact with elements of the fuselage, the wings, the drift or the empennage of the aircraft. .
On a représenté en relation avec la figure 11, un autre mode de réalisation de l'invention. Celui-ci est identique dans son principe que celui décrit en relation avec les figures 1 à 10, seul diffèrent la direction de débattement du compas.FIG. 11 shows another embodiment of the invention. This is identical in principle to that described in relation to Figures 1 to 10, only differ the direction of movement of the compass.
On peut ainsi d'ores et déjà observer que les variations angulaires dans le plan horizontal, respectivement du compas par rapport au mât (coordonnées θl), et de la nacelle par rapport à l'extrémité dudit compas (coordonnées Θ3) sont conservées.It can thus already be observed that the angular variations in the horizontal plane, respectively of the compass relative to the mast (coordinates θ1), and of the nacelle with respect to the end of said compass (coordinates Θ3) are retained.
En revanche, ledit compas, toujours constitué de deux bras, présente un débattement non plus dans un plan horizontal, mais dans un plan vertical. Ainsi, le bras (16) est susceptible d'être articulé, en plus de l'articulation décrite ci-dessus, par rapport à un axe horizontal (4), de telle sorte à lui permettre de présenter un débattement angulaire αl.On the other hand, said compass, still consisting of two arms, has a deflection either in a horizontal plane, but in a vertical plane. Thus, the arm (16) is capable of being articulated, in addition to the articulation described above, with respect to a horizontal axis (4), so as to allow it to have an angular deflection αl.
Les bras (16) et (17) sont en outre articulés l'un par rapport à l'autre au niveau d'un axe d'articulation (7), également horizontal, leur conférant la faculté d'un débattement angulaire α2.The arms (16) and (17) are further articulated relative to each other at a hinge axis (7), also horizontal, giving them the faculty of angular deflection α2.
Et enfin, la nacelle, positionnée à l'extrémité libre du bras (17), toujours articulée autour d'un axe vertical (5) lui conférant la faculté d'un débattement angulaire Θ3 est munie d'une seconde articulation autour d'un axe horizontal (27) ménagé au niveau de ladite extrémité dudit bras (17), lui conférant la faculté d'un débattement angulaire £(3.And finally, the nacelle, positioned at the free end of the arm (17), still articulated around a vertical axis (5) conferring on it the faculty of an angular displacement Θ3 is provided with a second articulation around a horizontal axis (27) provided at said end of said arm (17), conferring on it the faculty of an angular displacement £ (3.
On a ainsi représenté, en relation avec les figures 12 et 13, une telle variante, respectivement en position dépliée et en position repliée. Les débattements angulaires dans un plan horizontal sont identiques à ceux décrits dans la variante de base. En revanche, les débattements intervenant dans un plan vertical, propres à cette variante, sont réalisés au moyen de vérins, respectivement (28) entre le support (2) du compas et le bras (16), (29) entre le bras (16) et le bras (17), et (30) entre le bras (17) et la nacelle (6). Le principe de fonctionnement du dispositif de l'invention demeure identique à celui précédemment décrit.Thus, in relation to FIGS. 12 and 13, there is shown such a variant, respectively in the unfolded position and in the folded position. The angular deflections in a horizontal plane are identical to those described in the basic variant. On the other hand, the deflections intervening in a vertical plane, specific to this variant, are realized by means of jacks, respectively (28) between the support (2) of the compass and the arm (16), (29) between the arm (16). ) and the arm (17), and (30) between the arm (17) and the nacelle (6). The operating principle of the device of the invention remains identical to that previously described.
Avantageusement, les trois mouvements de rotation possibles, à savoir de la nacelle autour de l'axe (5), du compas autour de l'axe (3), et de l'écartement dudit compas, que cet écartement intervienne dans un plan horizontal ou vertical, sont asservis et gérés par une logique programmée, permettant ainsi de conférer à la nacelle un mouvement linéaire, plus intuitif pour l'utilisateur. Cette gestion par logique et micro- ordinateur permet ainsi de régler :Advantageously, the three possible rotational movements, namely the nacelle about the axis (5), the compass about the axis (3), and the spacing of said compass, that this spacing intervenes in a horizontal plane or vertical, are enslaved and managed by a programmed logic, thus allowing to give the nacelle a linear movement, more intuitive for the user. This management by logic and microcomputer allows to regulate:
- la position de la nacelle ; - le type de mouvement (translation, rotation.) ; la vitesse de progression de la nacelle ;- the position of the nacelle; - the type of movement (translation, rotation.); the speed of progression of the nacelle;
- la direction ;- The direction ;
- l'accélération de la nacelle dans le plan (X - O - Y).- acceleration of the nacelle in the plane (X - O - Y).
La nacelle et le compas sont en outre avantageusement munis de moyens d'absorption des chocs, eux-mêmes munis de détecteurs, engendrant l' arrêt immédiat du mouvement en cas de détection d'un choc.The nacelle and the compass are also advantageously provided with shock absorbing means, themselves equipped with detectors, generating the immediate stop movement in case of detection of a shock.
Enfin et avantageusement, ladite nacelle peut être elle-même munie d'un moyen de levage, constitué d'une potence embarquée, pour permettre de déposer au sol et de reprendre des éléments de l'avion pour en assurer la maintenance, tel que par exemple des composants de la dérive, de l'empennage, du fuselage, des moteurs, etc..Finally and advantageously, said nacelle can itself be provided with a lifting means, consisting of an onboard bracket, to allow to deposit the ground and take elements of the aircraft to ensure maintenance, such as by example of the components of the drift, empennage, fuselage, engines, etc.
Ce faisant, le dispositif conforme à l'invention présente un certain nombre d'avantages, parmi lesquels on peut citer ;In doing so, the device according to the invention has a number of advantages, among which may be mentioned;
- une accessibilité aisée à toutes les zones de l'empennage, des ailes, et du fuselage de l'avion, y compris celles non directement accessibles traditionnellement par une nacelle du type élévatrice ;- easy access to all areas of the empennage, wings, and fuselage of the aircraft, including those not directly accessible traditionally by a lift-type nacelle;
- la diminution importante des risques de chocs avec toute partie de l'avion, de par la mise en œuvre du système de compas à écartement asservi ;- the significant reduction of the risk of shocks with any part of the aircraft, by the implementation of the system of spaced apart compass;
- l'absence de toute charge supplémentaire sur la charpente du bâtiment ou des hangars, compte tenu du mode retenu de déplacement de ladite nacelle. - the absence of any additional load on the structure of the building or hangars, taking into account the chosen mode of displacement of the nacelle.

Claims

REVENDICATIONS
1. Dispositif élévateur, pour permettre notamment l'accès du personnel de maintenance aux différentes parties d'un avion, comprenant une base ou support (1), mobile ou non, reposant sur le sol, et pourvu d'un mât vertical (31) muni au voisinage de son extrémité supérieure d'une nacelle (6), ladite nacelle étant destinée à permettre le support d'une ou plusieurs personnes destinées à assurer un travail sur l'avion, caractérisé en ce que la nacelle (6) proprement dite est montée à l'extrémité d'un bras multiple (16, 17), susceptible de se déplier et de se replier, ledit bras multiple étant articulé en rotation par rapport à l'extrémité supérieure dudit mât (31).1. Elevating device, in particular to allow access for maintenance personnel to the different parts of an aircraft, comprising a base or support (1), mobile or not, resting on the ground, and provided with a vertical mast (31). ) provided in the vicinity of its upper end of a nacelle (6), said nacelle being intended to allow the support of one or more persons intended to ensure work on the aircraft, characterized in that the nacelle (6) properly said is mounted at the end of a multiple arm (16, 17), capable of unfolding and folding, said multiple arm being articulated in rotation relative to the upper end of said mast (31).
2. Dispositif élévateur, notamment pour permettre l'accès du personnel de maintenance aux différentes parties d'un avion selon la revendication 1, caractérisé en ce que le bras multiple est constitué par un compas, constitué de deux bras (16, 17) articulés l'un par rapport à l'autre.2. Lift device, in particular to allow access of maintenance personnel to the different parts of an aircraft according to claim 1, characterized in that the multiple arm is constituted by a compass, consisting of two articulated arms (16, 17). relative to each other.
3. Dispositif élévateur, notamment pour permettre l'accès du personnel de maintenance aux différentes parties d'un avion selon l'une des revendications 1 et 2, caractérisé en ce que le bras multiple (16, 17) est solidarisé au mât vertical3. Lift device, in particular to allow access for maintenance personnel to different parts of an aircraft according to one of claims 1 and 2, characterized in that the multiple arm (16, 17) is secured to the vertical mast
(31) par l'intermédiaire d'un mécanisme d'orientation, et notamment par une couronne d'orientation composée d'une bague intérieure (22), et d'une bague extérieure (24) mobiles l'une par rapport à l'autre.(31) by means of an orientation mechanism, and in particular by an orientation ring consisting of an inner ring (22), and an outer ring (24) movable relative to one another. 'other.
4. Dispositif élévateur, notamment pour permettre l'accès du personnel de maintenance aux différentes parties d'un avion selon l'une des revendications 1 à 3, caractérisé en ce que le mât vertical (31) est fixe et solidarisé au sol.4. Lift device, in particular to allow access to maintenance personnel to different parts of an aircraft according to one of claims 1 to 3, characterized in that the vertical mast (31) is fixed and secured to the ground.
5. Dispositif élévateur, notamment pour permettre l'accès du personnel de maintenance aux différentes parties d'un avion selon la revendication 4, caractérisé en ce que la bague extérieure de la couronne d'orientation (24) est montée sur un châssis support intermédiaire (15) support, pourvu de galets de guidage prenant appui sur le mât (31), ledit châssis étant susceptible de se déplacer verticalement le long dudit mât (31) au moyen d'un câble motorisé monté en boucle entre deux poulies, respectivement supérieure et inférieure, solidarisé à ladite couronne, ou d'un vérin. 5. Lift device, in particular to allow access for maintenance personnel to different parts of an aircraft according to claim 4, characterized in that the outer ring of the slewing ring (24) is mounted on an intermediate support frame (15) support, provided with guide rollers bearing on the mast (31), said frame being able to move vertically along said mast (31) by means of a motorized cable mounted in a loop between two pulleys, respectively greater and lower, secured to said ring, or a jack.
6. Dispositif élévateur, notamment pour permettre l'accès du personnel de maintenance aux différentes parties d'un avion selon la revendication 4, caractérisé en ce que la bague extérieure de la couronne d'orientation (24) est montée sur un châssis support intermédiaire (15), pourvu de galets de guidage prenant appui sur le mât (31), et en ce que ledit châssis est susceptible de se déplacer verticalement le long dudit mât (31), le châssis étant muni à cet effet d'un pignon denté motorisé, susceptible de venir engrener sur une crémaillère verticale solidarisée au mât.6. Lift device, in particular to allow access of maintenance personnel to the various parts of an aircraft according to claim 4, characterized in that the outer ring of the slewing ring (24) is mounted on an intermediate support frame (15), provided with guide rollers bearing on the mast (31), and in that said frame is able to move vertically along said mast (31), the frame being provided for this purpose with a pinion gear motorized, likely to come mesh on a vertical rack secured to the mast.
7. Dispositif élévateur, notamment pour permettre l'accès du personnel de maintenance aux différentes parties d'un avion selon la revendication 4, caractérisé en ce que le mât vertical (31) est télescopique, et est constitué d'un fût fixe solidarisé au sol, et d'une pluralité de fûts mobiles, susceptibles de se déployer hors de, ou au contraire de s'escamoter au sein du fût fixe au moyen d' au moins un vérin.7. Lift device, in particular to allow access to maintenance personnel to different parts of an aircraft according to claim 4, characterized in that the vertical mast (31) is telescopic, and consists of a fixed shaft secured to the floor, and a plurality of movable drums, capable of being deployed out of, or on the contrary of retracting within the fixed shaft by means of at least one jack.
8. Dispositif élévateur, notamment pour permettre l'accès du personnel de maintenance aux différentes parties d'un avion selon la revendication 7, caractérisé en ce que les fûts mobiles se déploient hors de, ou s'escamotent au sein du fût fixe au moyen d'au moins deux jeux de plusieurs vérins double- effets, respectivement inférieur et supérieur.8. Lift device, in particular to allow access to maintenance personnel to the various parts of an aircraft according to claim 7, characterized in that the mobile drums unfold out of or retract within the fixed barrel by means of at least two sets of several double-acting cylinders, respectively lower and upper.
9. Dispositif élévateur, notamment pour permettre l'accès du personnel de maintenance aux différentes parties d'un avion selon l'une des revendications 1 à 3, caractérisé en ce que le mât vertical (31) est monté sur un chariot (1) mobile, et en ce que le mât est télescopique, et est constitué d'un fût fixe (10) solidarisé audit chariot (1), et d'une pluralité de fûts mobiles (11-14), susceptibles de se déployer hors de, ou au contraire de s'escamoter au sein du fût fixe au moyen d'au moins un vérin.9. Lift device, in particular to allow access for maintenance personnel to different parts of an aircraft according to one of claims 1 to 3, characterized in that the vertical mast (31) is mounted on a carriage (1) mobile, and in that the mast is telescopic, and consists of a fixed shaft (10) secured to said carriage (1), and a plurality of movable drums (11-14), capable of being deployed out of, or on the contrary to retract within the fixed shaft by means of at least one jack.
10. Dispositif élévateur, notamment pour permettre l'accès du personnel de maintenance aux différentes parties d'un avion selon la revendication 9, caractérisé en ce que les fûts mobiles (11 - 14) sont susceptibles de se déployer hors de, ou au contraire de s'escamoter au sein du fût fixe (10) au moyen de deux jeux (19, 20) de plusieurs vérins double-effets, respectivement inférieur et supérieur. 10. Lift device, in particular to allow access to the maintenance personnel to the different parts of an aircraft according to claim 9, characterized in that the mobile drums (11 - 14) are likely to deploy out of, or on the contrary to retract within the fixed shaft (10) by means of two sets (19, 20) of several double-acting cylinders, respectively lower and upper.
11. Dispositif élévateur, notamment pour permettre l'accès du personnel de maintenance aux différentes parties d'un avion selon l'une des revendications 8 et 10, caractérisé en ce que les vérins du jeu inférieur (19) sont respectivement solidarisés au sol ou au chariot mobile (1) et à une bride horizontale d'interfaçage (21), elle-même solidarisée au voisinage de l' extrémité supérieure de l'un des fûts mobiles (12), et en ce que les vérins du jeu supérieur (20) sont respectivement solidarisés à ladite bride d'interfaçage (21) et à au voisinage de l'extrémité supérieure du fût mobile extrême (14).11. Lift device, in particular to allow access to the maintenance personnel to different parts of an aircraft according to one of claims 8 and 10, characterized in that the cylinders of the lower set (19) are respectively secured to the ground or to the movable carriage (1) and to a horizontal interfacing flange (21), itself secured in the vicinity of the upper end of one of the movable drums (12), and in that the cylinders of the upper set ( 20) are respectively secured to said interfacing flange (21) and in the vicinity of the upper end of the end mobile shaft (14).
12. Dispositif élévateur, notamment pour permettre l'accès du personnel de maintenance aux différentes parties d'un avion selon l'une des revendications 2 à 11, caractérisé en ce que le bras multiple est constitué de deux bras (16, 17), susceptibles chacun de se déplacer dans un plan horizontal, les deux bras étant articulés l'un par rapport à l'autre par rapport à un axe vertical (7).Elevating device, in particular to allow maintenance personnel access to the different parts of an aircraft according to one of claims 2 to 11, characterized in that the multiple arm consists of two arms (16, 17), each capable of moving in a horizontal plane, the two arms being articulated relative to each other with respect to a vertical axis (7).
13. Dispositif élévateur, notamment pour permettre l'accès du personnel de maintenance aux différentes parties d'un avion selon l'une des revendications 2 à 11, caractérisé en ce que le bras multiple est constitué de deux bras (16, 17), susceptibles chacun de se déplacer dans un plan vertical, les deux bras étant articulés l'un par rapport à l'autre par rapport à un axe horizontal (7), le débattement desdits bras dans un plan vertical étant assuré au moyens de vérins.Lift device, in particular to allow maintenance personnel access to the different parts of an aircraft according to one of claims 2 to 11, characterized in that the multiple arm consists of two arms (16, 17), each capable of moving in a vertical plane, the two arms being articulated relative to each other with respect to a horizontal axis (7), the movement of said arms in a vertical plane being provided by the means of jacks.
14. Dispositif élévateur, notamment pour permettre l'accès du personnel de maintenance aux différentes parties d'un avion selon l'une des revendications 2 à 13, caractérisé en ce que les trois mouvements de rotation possibles, à savoir de la nacelle autour de l'axe (5), du compas autour de l'axe (3), et de l'écartement dudit compas sont asservis et gérés par une logique programmée, susceptible de conférer à la nacelle un mouvement linéaire. 14. Lift device, in particular to allow access for maintenance personnel to different parts of an aircraft according to one of claims 2 to 13, characterized in that the three possible rotational movements, namely the nacelle around the axis (5), the compass around the axis (3), and the spacing of said compass are controlled and controlled by a programmed logic, likely to give the nacelle a linear movement.
PCT/EP2005/011704 2004-11-08 2005-10-28 Lift device which is intended, for example, to enable maintenance personnel to access different parts of an aircraft WO2006048247A1 (en)

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FR0411859A FR2877659B1 (en) 2004-11-08 2004-11-08 LIFTING DEVICE, ESPECIALLY TO ENABLE THE MAINTENANCE PERSONNEL TO ACCESS THE DIFFERENT PARTS OF AN AIRCRAFT
FR04/11859 2004-11-08

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US8263716B2 (en) 2004-02-04 2012-09-11 Basf Aktiengesellschaft Fluid polyester molding masses
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FR2877659B1 (en) 2007-01-12
EP1809534A1 (en) 2007-07-25

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