EP0117862A2 - Lifting device, in particular a working-platform - Google Patents

Lifting device, in particular a working-platform Download PDF

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Publication number
EP0117862A2
EP0117862A2 EP84870025A EP84870025A EP0117862A2 EP 0117862 A2 EP0117862 A2 EP 0117862A2 EP 84870025 A EP84870025 A EP 84870025A EP 84870025 A EP84870025 A EP 84870025A EP 0117862 A2 EP0117862 A2 EP 0117862A2
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EP
European Patent Office
Prior art keywords
nacelle
lifting
machine
motor
lifting device
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
EP84870025A
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German (de)
French (fr)
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EP0117862A3 (en
EP0117862B1 (en
Inventor
Roger Husson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NOVITEC SC
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NOVITEC sc
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Filing date
Publication date
Priority claimed from BE0/211502A external-priority patent/BE897720R/en
Application filed by NOVITEC sc filed Critical NOVITEC sc
Priority to AT84870025T priority Critical patent/ATE39467T1/en
Publication of EP0117862A2 publication Critical patent/EP0117862A2/en
Publication of EP0117862A3 publication Critical patent/EP0117862A3/en
Application granted granted Critical
Publication of EP0117862B1 publication Critical patent/EP0117862B1/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
    • B66D5/02—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
    • B66D5/12—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes with axial effect
    • B66D5/14—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes with axial effect embodying discs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/60—Rope, cable, or chain winding mechanisms; Capstans adapted for special purposes
    • B66D1/74—Capstans
    • B66D1/7415—Friction drives, e.g. pulleys, having a cable winding angle of less than 360 degrees

Definitions

  • the present invention relates to a lifting machine in particular a generally rectangular, motorized, suspended nacelle which is called upon to move from bottom to top and vice versa along a facade of a building or other edifice.
  • the lifting device or nacelle according to the present invention is substantially simplified; it is in fact only provided with a single electric motor or other fuel such as gasoline, fuel oil.
  • this lifting machine in particular a nacelle is characterized in that on the one hand, in its longitudinal center are aligned, a motor which can be coupled by a first transmission shaft to a generally hydraulic reversing coupler, for example controlled by a pneumatic cylinder making it possible to reverse the direction of the nacelle relative to the motor which always turns in the same direction, this coupler is coupled by a second transmission shaft to a reduction gear, possibly reduction gear, intended to return at right angles the motor movement, and second transmission shaft interposed, between the coupler and the reduction gear, a flywheel integral with said shaft which can be slowed down and blocked by a jaw braking device taking on the flywheel whose opening is not obtained only by the pressure on a control means, and reducer, bevel gear, which, on the other hand, causes, perpendicular to the transverse alignment, on both sides, a tr third gear shaft at the ends of which is placed a lifting nut on which a chain takes.
  • a motor which can be coupled by a first transmission shaft to
  • provision may be made for using a motor with a double direction of rotation, which may be the case for a single-phase electric motor and which will make the reversing coupler useless, this latter function being provided by the motor. .
  • this type of motor has a magnetic brake which will operate in the event of a power failure.
  • link chains If it was mainly a question of link chains, it should however be understood that it is also possible to use roller chains, chains comprising plates and pins as well as chains of the Galle type or bicycle chains or still marine chains, link chains. It is always also possible, to meet very strict safety regulations, to double on each side of the nacelle, the suspension system of the nacelle.
  • the nacelle be immobilized when it is overloaded and that beyond a determined weight
  • the motor collapsing the floating chassis, tilts and the counterweight in balance will rise and come directly or through an element resting on the balance beam on the counterweight side and cut off the operation of the engine and therefore the stop of the nacelle.
  • a frame or an arm floating freely a few centimeters under the nacelle and frame or arm which, when it encounters an obstacle, for example an open window, protruding from the facade of the building on the descending course of the nacelle, will force this frame or arm to (get) closer to the nacelle, which will cause via a trigger, stopping the nacelle, by stopping the engine, which triggers the braking system.
  • the motor is a simple direction of rotation, it will serve both to drive the ascent and descent of the nacelle; the jaw braking device is biased by a spring which tends to close the jaw unless the spring is compressed, which it is intended to be able to do, for example by means of a pneumatic cylinder, so as to block the assembly in the event of a breakdown, by an exhaust system 1 the compressed air.
  • the steering wheel may include a second emergency braking device, possibly also with a jaw, which intervenes as soon as the steering wheel is driven at a speed greater than a desired speed, preferably the steering wheel comprising a part which, according to the principle of the counterweight, will emerge from the circle formed by the steering wheel and release the second braking device.
  • a second emergency braking device possibly also with a jaw, which intervenes as soon as the steering wheel is driven at a speed greater than a desired speed, preferably the steering wheel comprising a part which, according to the principle of the counterweight, will emerge from the circle formed by the steering wheel and release the second braking device.
  • the lifting nut which completes the third transmission arm and nut on which the chain takes can be placed in a housing or box such that the chain cannot disengage from the toothed nut by any slack in the chain; moreover, if this nut is not centered on the transverse lateral side of one or the nacelle, two directional nuts are provided, toothed or not, superimposed and placed in the transverse central alignment of the nacelle, one being higher and the other lower than the drive nut; these two nuts can also be provided in the same housing or box as the lifting nut, and possibly driven relative to the transmission axis by a chain and sprockets system.
  • the push-button control panel (17) (18, 18 ') is connected on the one hand to a duct (19) to the compressor (15) and on the other hand, by another duct (20) going to the reversing coupler, a common conduit (21) connecting the two conduits (19 and 20) to the panel (17). Furthermore, the compressor (15) is also connected by a double duct (22, 22a, 22b) respectively terminated by valves (23, 24) placed above and below the nacelle on the passage of the chain (14 ).
  • valves (23, 24) (possibly on the other side of the conduits (22 ', 22'a, 22'b) of the valves (23', 24 ') relative to the chain (14') / will be opened by an upper pawl (25) (possibly (25 ') on the other side) and a lower pawl (26) (possibly (26') on the other side); these pawls (25, 26) (and possibly (25 ', 26')) are attached one or more (25, 25 ') near the upper end of the chain (s) (14, 14') near their attachment point and the other others (26, 26 ') and at the lower end of the chain (s) (14, 14') near where the chains rest on
  • These pawls (25, 26) and possibly (25 ', 26') are intended to open the valves (23, 24) and possibly (23 ', 24') which has the effect of canceling the effect of the compressor ( 15) and release the spring (16)
  • boxes or housings (11, 11 ') are in two parts (IIa, llb), parts joined to each other by screws (27).
  • an emergency braking device (28) which operates automatically and which will intervene if for any reason during the descent of the nacelle (1) (and possibly the ascent although this is less important) the speed had to exceed a determined and desired speed and appreciably higher than the slow speed at which normally the gondola (1) will be driven by the motor (2).
  • This emergency braking device (28) will act as the braking device (8) on the steering wheel (7) and is also a jaw brake (29, 30) closing under the action of a spring (not visible in Figure 6) but brake which in principle is kept open by a wedge or prop (31).
  • this wedge or prop (31) is however ejectable and there is provided for this purpose a trigger (32), moving part placed at the perimeter of the steering wheel (7) which when the speed of said flywheel exceeds a certain speed tends to move away from the outer circle of the flywheel (9) and will therefore strike the shim or prop (31) and eject it so that the brake shoes (29, 30) come to brake, then lock the flywheel (7 ) which causes the descent of the nacelle (1) to stop.
  • the operation of the nacelle is very simple after starting the engine (2); to raise it, the finger (18) is pushed, which releases the flywheel (7) from the jaw brake (8), the compressor, pneumatic cylinder (15) driving the spring (16) and the control another pneumatic cylinder (not shown) of the reversing coupler (4), which allows the motor (2) to rotate the various transmission arms (3, 5, 10, 10 '), the latter ( 10, 10 ') causing the nuts (12, 12') to rotate which will mesh with the chains (14, 14 ') which will force the ascent of the nacelle.
  • the brake shoe (8) closes and the coupler (4) is put in neutral and the nacelle will be braked then stopped in its rise.
  • the command of the reversing coupler (4) also requested by the button (18 ') allows the motor (2) to drive in rotation (opposite to what is described above) at a desired speed, the different arms transmission (3, 5, 10, 10 '), the latter causing the rotation of the lifting nuts (12, 12') which will mesh on the chains (14, 14 ') which will cause the nacelle to descend . More particularly for the descent of the nacelle, it is the reversing coupler (4) which will limit, by reducing and braking, the speed of rotation of the motor and therefore the speed of descent (or ascent). of the nacelle (1). Each time that the pressure on the button (18 ') is released, the jaw brake (8) closes and the descent of the nacelle is braked, then stopped.
  • the descent of the nacelle (1) should be done at a speed exceeding the admissible limits (or even the ascent although this is practically not possible because in uphill, the weight and the load of the nacelle of course not intervene), this will cause the lifting nuts (12, 12 '), the drive shafts (10, 10', 5, 3) to rotate at higher speeds than those allowed and also therefore the flywheel (7) which, from a determined speed of rotation, will request the trigger (32) which will eject the shim or prop (31) and therefore cause the emergency braking device (28) to operate ).
  • the hydraulic reversing coupler (4) of the nacelle can be provided with a bypass system (bypass) allowing a limiting adjustment relative to the maximum permitted load; this system can also apply to any other lifting device where it is also essential to provide this adaptation.
  • the pneumatic cylinders for releasing the braking device (8) as for controlling the reversing coupler (4) can be either pressure or decompression.
  • FIG. 2 there is also shown, by (33, 33 ′) (FIG. 2) two bearings by which the floating chassis (34), carrying the motor (2) and the other elements (3, 4, 7, 8, 6), is held to the structure of the nacelle (not shown).
  • the floating frame (34) is capable of descending on the side where it is free, that is to say on the side opposite the bearings (33, 33 '), according to the boom (35), is normally maintained horizontally by a balance system composed of a beam (36), held at a point (37) directly or via an arm (38) to the structure of the nacelle (not shown).
  • a balance system composed of a beam (36), held at a point (37) directly or via an arm (38) to the structure of the nacelle (not shown).
  • One side of the beam (36 ') is connected to the floating frame (34) and on the other side it has a counterweight (40). The value of this counterweight (40) is determined by the load which it is desired to admit on the nacelle in operation.
  • This switch (44) is connected to a horn control (not shown) which, in the event of a stop, also informs, by switching it on, that it is a stop due to an overload.
  • FIG. 5 there is also shown a complementary chain control device (14 ') which is not directly driven by the transmission arm (10') but by a complementary system which includes a nut (50 ) in addition, a complementary chain (5.1) relaying the movement of this nut (50) to the other three nuts (13a, 12, 13b) so as to avoid slack in the chain (14 ').
  • the invention is not limited to the embodiments described and shown and it would of course be possible to provide different variants, in particular as regards the balance device, for example providing that one of the plagues acts directly on a switch, provide that the weight can be moved on a beam fitted with a scale determining different admissible loads.
  • the frame placed under the nacelle could be of another shape, mounted differently under the nacelle and act directly on a switch.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Types And Forms Of Lifts (AREA)

Abstract

1. Lifting appliance, in particular nacelle (1) of generally rectangular, powered, suspended type, able to move upwardly and reversely along a facade wall or a bulding, characterized in that, on the one hand, along its lengthwise centre, are aligned a motor (2) able to be connected through a first transmission shaft (3) with a coupling-reversing device (4), for example controlled by means of a pneumatic jack, this coupling-reversing device being connected through a second shaft (5) with a case (6) containing a reduction unit intended to change the driving motion into a right-angled one, said second transmission shaft (5) bearing between the coupling-reversing device (4) and the case (6) containing the reduction unit, a flywheel (7) which is integral with said shaft and can be decelerated and blocked by means of a braking device (8) with jaws (9, 9') acting on the flywheel and the opening of which can only be obtained through a pressure exerted on a control means, this case containing said reduction unit driving, on the other hand, perpendicularly to the transverse alignment and on both sides, a third transmission shaft (10, 10') at the ends of which is located a lifting wheel (12) on which in each case passes a chain (14, 14') fastened along a building.

Description

La présente invention est relative à un engin de levage en particulier une nacelle généralement rectangulaire, motorisée, suspendue et appelée à se déplacer de bas en haut et inversement le long d'une façade d'un bâtiment ou autre édifice.The present invention relates to a lifting machine in particular a generally rectangular, motorized, suspended nacelle which is called upon to move from bottom to top and vice versa along a facade of a building or other edifice.

On connaît déjà ce type d'engin qui généralement se déplace grâce à l'aide de deux moteurs électriques fonctionnant chacun par rapport à un câble accroché au haut de la façade du bâtiment.We already know this type of machine which generally moves thanks to the help of two electric motors each operating with respect to a cable hung at the top of the facade of the building.

L'engin de levage ou nacelle selon la présente invention est sensiblement simplifiée; elle n'est en effet pourvue notamment que d'un seul moteur électrique ou à autre combustible comme essence, mazout.The lifting device or nacelle according to the present invention is substantially simplified; it is in fact only provided with a single electric motor or other fuel such as gasoline, fuel oil.

En effet, cet engin de levage en particulier une nacelle se caractérise en ce que d'une part, en son centre longitudinal sont alignés, un moteur pouvant s'accoupler par un premier arbre de transmission à un coupleur-inverseur généralement hydraulique, par exemple commandé par un vérin pneumatique permettant d'inverser le sens de la nacelle par rapport au moteur qui lui tourne toujours dans le même sens, ce coupleur est accouplé par un deuxième arbre de transmission à un réducteur, éventuellement démultiplicateur, destiné à renvoyer à angle droit le mouvement moteur, et deuxième arbre de transmission portant interposé, entre le coupleur et le réducteur, un volant solidaire de cedit arbre qui peut être ralenti et bloqué par un dispositif de freinage à mâchoire prenant sur le volant dont l'ouverture n'est obtenue que par la pression sur un moyen de commande, et réducteur, renvoi d'angle, qui, d'autre part, entraine, perpendiculairement à l'alignement transversal, de part et d'autre, un troisième arbre de transmission aux extrémités desquelles est placée une noix de levage sur laquelle prend une chaîne.Indeed, this lifting machine in particular a nacelle is characterized in that on the one hand, in its longitudinal center are aligned, a motor which can be coupled by a first transmission shaft to a generally hydraulic reversing coupler, for example controlled by a pneumatic cylinder making it possible to reverse the direction of the nacelle relative to the motor which always turns in the same direction, this coupler is coupled by a second transmission shaft to a reduction gear, possibly reduction gear, intended to return at right angles the motor movement, and second transmission shaft interposed, between the coupler and the reduction gear, a flywheel integral with said shaft which can be slowed down and blocked by a jaw braking device taking on the flywheel whose opening is not obtained only by the pressure on a control means, and reducer, bevel gear, which, on the other hand, causes, perpendicular to the transverse alignment, on both sides, a tr third gear shaft at the ends of which is placed a lifting nut on which a chain takes.

Dans une forme de réalisation préférentielle, on peut prévoir d'utiliser un moteur à double sens de rotation ce qui peut être le cas pour un moteur électrique monophasé et ce qui va rendre inutile le coupleur-inverseur, cette dernière fonction étant assurée par le moteur. Généralement ce type de moteur comporte un frein magnétique qui va fonctionner en cas de coupure de courant.In a preferred embodiment, provision may be made for using a motor with a double direction of rotation, which may be the case for a single-phase electric motor and which will make the reversing coupler useless, this latter function being provided by the motor. . Generally this type of motor has a magnetic brake which will operate in the event of a power failure.

S'il a été question essentiellement de chaînes à maillons, il doit toutefois être entendu qu'il est possible d'utiliser également des chaînes à rouleaux, chaînes comportant des plaquettes et des axes ainsi que des chaînes du type Galle ou chaînes à vélo ou encore des chaînes marines, chaînes à maillons. Il est toujours possible aussi, pour répondre à des réglementations très strictes de sécurité, de doubler de chaque côté de la nacelle, le système de suspension de la nacelle.If it was mainly a question of link chains, it should however be understood that it is also possible to use roller chains, chains comprising plates and pins as well as chains of the Galle type or bicycle chains or still marine chains, link chains. It is always also possible, to meet very strict safety regulations, to double on each side of the nacelle, the suspension system of the nacelle.

En outre dans une forme de réalisation particulière selon laquelle on désire que la nacelle soit immobilisée lorsqu'elle est surchargée et cela au-delà d'un poids déterminé, on a prévu de placer l'ensemble, du moteur, du coupleur-inverseur s'il y en a un nécessaire, du réducteur, ainsi que du volant, sur lequel prend le dispositif de freinage, sur un châssis flottant tenu d'un côté par deux paliers à rarbre de transmission principal, le châssis flottant comportant un système de balance à contrepoids d'une valeur déterminée par la charge maximum que l'on souhaite admettre sur la nacelle et qui maintient normalement le châssis flottant plus ou moins parallèlement au plancher de la nacelle.In addition, in a particular embodiment according to which it is desired that the nacelle be immobilized when it is overloaded and that beyond a determined weight, provision has been made to place the assembly, of the motor, of the reversing coupler s '' there is a necessary one, the reduction gear, as well as the flywheel, on which takes the braking device, on a floating chassis held on one side by two bearings with main transmission transmission, the floating chassis comprising a balance system with counterweight of a value determined by the maximum load which one wishes to admit on the nacelle and which normally maintains the floating chassis more or less parallel to the floor of the nacelle.

Dès lors qu'il y a surcharge, le moteur s'affaissant le châssis flottant, s'incline et le contrepoids en balance va monter et venir directement ou par l'intermédiaire d'un élément reposant sur le fléau de la balance du côté du contrepoids et couper le fonctionnement du moteur et de ce fait, l'arrêt de la nacelle. En outre, on prévoit également que cette coupure entraine la mise en marche d'un signal, un claxon par exemple, informant que l'arrêt de la nacelle est dû à une surcharge.As soon as there is overload, the motor collapsing the floating chassis, tilts and the counterweight in balance will rise and come directly or through an element resting on the balance beam on the counterweight side and cut off the operation of the engine and therefore the stop of the nacelle. In addition, provision is also made for this cut-off to cause a signal to start, a horn for example, informing that the stop of the nacelle is due to an overload.

De préférence, en particulier pour des nacelles destinées à se déplacer le long des façades d'immeubles, on prévoit en-dessous de celles-ci généralement sur toute leur longueur un cadre ou un bras flottant librement à quelques centimètres sous la nacelle et cadre ou bras qui, lorsqu'il rencontre un obstacle, par exemple une fenêtre ouverte, dépassant de la façade du bâtiment sur le parcours descendant de la nacelle, va obliger ce cadre ou bras à (se) rapprocher de la nacelle, ce qui va entrainer par l'intermédiaire d'un déclencheur, l'arrêt de la nacelle, en arrêtant le moteur, ce qui entraine le déclenchement du système de freinage.Preferably, in particular for nacelles intended to move along the facades of buildings, there is provided below these generally over their entire length a frame or an arm floating freely a few centimeters under the nacelle and frame or arm which, when it encounters an obstacle, for example an open window, protruding from the facade of the building on the descending course of the nacelle, will force this frame or arm to (get) closer to the nacelle, which will cause via a trigger, stopping the nacelle, by stopping the engine, which triggers the braking system.

Si le moteur est à simple sens de rotation il va servir tant à entraîner la montée que la descente de la nacelle; le dispositif de freinage à mâchoire est sollicité par un ressort qui tend à refermer la mâchoire à moins que l'on compresse le ressort, ce que l'on prévoit de pouvoir faire au moyen par exemple d'un vérin pneumatique, de façon à bloquer l'ensemble en cas de panne, par un système d'échappement 1 l'air comprimé.If the motor is a simple direction of rotation, it will serve both to drive the ascent and descent of the nacelle; the jaw braking device is biased by a spring which tends to close the jaw unless the spring is compressed, which it is intended to be able to do, for example by means of a pneumatic cylinder, so as to block the assembly in the event of a breakdown, by an exhaust system 1 the compressed air.

Le volant peut comporter un deuxième dispositif de freinage de secours éventuellement également à mâchoire, qui intervient dès que le volant est entrainé à une vitesse plus grande qu'une vitesse voulue, de préférence le volant comportant une pièce qui selon le principe de la masselotte, va se dégager du cercle formé par le volant et libérer le deuxième dispositif de freinage.The steering wheel may include a second emergency braking device, possibly also with a jaw, which intervenes as soon as the steering wheel is driven at a speed greater than a desired speed, preferably the steering wheel comprising a part which, according to the principle of the counterweight, will emerge from the circle formed by the steering wheel and release the second braking device.

La noix de levage qui termine le troisième bras de transmission et noix sur laquelle prend la chaîne, peut être placée dans un logement ou boîte tel que la chaîne ne peut se déboîter de la noix dentée par un quelconque mou à la chaîne; par ailleurs, si cette noix n'est pas centrée sur le côté latéral transversal de une ou la nacelle, on prévoit/deux noix directionnelles, dentées ou non, superposées et placées dans l'alignement central transversal de la nacelle, l'une étant plus haute et l'autre plus basse que la noix d'entrainement; ces deux noix peuvent également être prévues dans le même logement ou boîte que la noix de levage, et éventuellement entrainées par rapport à l'axe de transmission par un système à chaîne et pignons.The lifting nut which completes the third transmission arm and nut on which the chain takes, can be placed in a housing or box such that the chain cannot disengage from the toothed nut by any slack in the chain; moreover, if this nut is not centered on the transverse lateral side of one or the nacelle, two directional nuts are provided, toothed or not, superimposed and placed in the transverse central alignment of the nacelle, one being higher and the other lower than the drive nut; these two nuts can also be provided in the same housing or box as the lifting nut, and possibly driven relative to the transmission axis by a chain and sprockets system.

Afin de mieux comprendre l'invention, on la décrit maintenant de manière exemplative et non limitative par rapport à un dessin qui représente :

  • à la figure 1, une vue schématique d'une nacelle conforme à l'invention;
  • à la figure 2, une vue de haut schématique montrant le dispositif d'arrêt pour surcharge d'une nacelle;
  • à la figure 3, une vue schématique de côté de ce même dispositif d'arrêt pour surcharge d'une nacelle;
  • à la figure 4, une vue agrandie en détâché du logement de la chaîne;
  • aux figures 5 et 6, deux vues agrandies du dispositif de freinage; à la figure 7, une vue schématique du dispositif de freinage;
  • à la figure 8, une vue schématique du dispositif prévu sous la nacelle pour l'arrêter si elle rencontre un obstacle.
In order to better understand the invention, it is now described by way of example and without limitation in relation to a drawing which represents:
  • in Figure 1, a schematic view of a nacelle according to the invention;
  • in Figure 2, a schematic top view showing the stop device for overloading a nacelle;
  • in Figure 3, a schematic side view of the same stop device for overloading a nacelle;
  • in Figure 4, an enlarged detached view of the chain housing;
  • in Figures 5 and 6, two enlarged views of the braking device; in Figure 7, a schematic view of the braking device;
  • in Figure 8, a schematic view of the device provided under the nacelle to stop it if it encounters an obstacle.

En se référant à ces différentes figures, on a représenté par (1) la nacelle à nu, c'est-à-dire sans plancher, par (2) un moteur, par (3) - voir figure 3 - un premier arbre de transmission, par (4) un coupleur-inverseur hydraulique, par (5) un deuxième arbre de transmission, par (6) une boîte comportant un réducteur, renvoi d'angle (non représenté), par (7) un volant sur lequel peut venir prendre un dispositif de freinage (8) à mâchoire (9, 9'), par (10, 10') un troisième arbre de transmission, par (11, 11') les deux logements ou boîtes dans lesquels se placent les noix de levage (12), ainsi que les deux noix directionnelles (13a, 13b) par lesquelles passent les chaînes (14, 14') avant et après que les maillons des chaînes ont pris sur les dents des noix dentées respectives, par (15) un compresseur vérin pneumatique (figure 5) qui va permettre l'ouverture du dispositif de freinage en comprimant le ressort (16) qui maintient normalement les mâchoires (9, 9') du dispositif (8) contre le volant (7), par (17) un tableau de commande à deux boutons-poussoir (18, 18') revenant automatiquement en position de départ et respectivement lorsqu'ils sont poussés, ouvrent les mâchoires (9, 9') et permettent ainsi au moteur d'entraîner l'arbre de transmission (3) à une certaine vitesse de rotation, et l'un (18), par exemple pour la montée de la nacelle (1) et l'autre (18'), par exemple pour la descente de la nacelle (1).Referring to these different figures, there is shown by (1) the nacelle bare, that is to say without floor, by (2) a motor, by (3) - see Figure 3 - a first shaft transmission, by (4) a hydraulic reversing coupler, by (5) a second shaft transmission, by (6) a box comprising a reduction gear, angle gear (not shown), by (7) a flywheel on which a jaw braking device (8) (9, 9 ') can come, by (10, 10 ') a third transmission shaft, by (11, 11') the two housings or boxes in which the lifting nuts (12) are placed, as well as the two directional nuts (13a, 13b) through which pass the chains (14, 14 ') before and after the chain links have taken on the teeth of the respective toothed nuts, by (15) a pneumatic cylinder compressor (FIG. 5) which will allow the opening of the braking device by compressing the spring (16) which normally holds the jaws (9, 9 ') of the device (8) against the steering wheel (7), by (17) a control panel with two push buttons (18, 18') automatically returning to starting position and respectively when pushed, open the jaws (9, 9 ') and thus allow the motor to drive the transmission shaft sion (3) at a certain speed of rotation, and one (18), for example for raising the nacelle (1) and the other (18 '), for example for lowering the nacelle (1) .

Le tableau de commande (17) à boutons-poussoir (18, .18') est relié d'une part à un conduit (19) au compresseur (15) et d'autre part, par un autre conduit (20) allant au coupleur-inverseur, un conduit commun (21) reliant les deux conduits (19 et 20) au tableau (17). Par ailleurs, le compresseur (15) est encore relié par un double conduit (22, 22a, 22b) respectivement terminé par des soupapes (23, 24) placées au-dessus et en dessous de la nacelle sur le passage de la chaîne (14). Ces soupapes (23, 24) (éventuellement de l'autre côté des conduits (22', 22'a, 22'b) des soupapes (23', 24') par rapport à la chaîne (14')/seront ouvertes par un cliquet supérieur (25) (éventuellement (25') de l'autre côté) et un cliquet inférieur (26) (éventuellement (26') de l'autre côté); ces cliquets (25, 26) (et éventuellement (25', 26')) sont attachés l'un ou les uns (25, 25') près de l'extrémité supérieure de la ou des chaînes (14, 14') près de leur point d'accrochage et l'autre ou les autres (26, 26') et à l'extrémité inférieure de la ou des chaînes (14, 14') près de l'endroit où les chaînes reposent sur Ces cliquets (25, 26) et éventuellement (25', 26') sont destinés à ouvrir les soupapes (23, 24) et éventuellement (23', 24') ce qui a pour effet d'annuler l'effet du compresseur (15) et libérer le ressort (16) ce qui entraîne la fermeture des mâchoires (9, 9') et l'arrêt de la montée ou la descente de la nacelle (1) lorsqu'elle est en fin de course, en outre de ce fait on va débrayer le coupleur-inverseur (4) hydraulique du mécanisme.The push-button control panel (17) (18, 18 ') is connected on the one hand to a duct (19) to the compressor (15) and on the other hand, by another duct (20) going to the reversing coupler, a common conduit (21) connecting the two conduits (19 and 20) to the panel (17). Furthermore, the compressor (15) is also connected by a double duct (22, 22a, 22b) respectively terminated by valves (23, 24) placed above and below the nacelle on the passage of the chain (14 ). These valves (23, 24) (possibly on the other side of the conduits (22 ', 22'a, 22'b) of the valves (23', 24 ') relative to the chain (14') / will be opened by an upper pawl (25) (possibly (25 ') on the other side) and a lower pawl (26) (possibly (26') on the other side); these pawls (25, 26) (and possibly (25 ', 26')) are attached one or more (25, 25 ') near the upper end of the chain (s) (14, 14') near their attachment point and the other others (26, 26 ') and at the lower end of the chain (s) (14, 14') near where the chains rest on These pawls (25, 26) and possibly (25 ', 26') are intended to open the valves (23, 24) and possibly (23 ', 24') which has the effect of canceling the effect of the compressor ( 15) and release the spring (16) which causes the jaws to close (9, 9 ') and stop the ascent or descent of the nacelle (1) when it is at the end of its travel, in addition to this fact we will disengage the hydraulic reversing coupler (4) of the mechanism.

En se référant à la figure 4, on voit que les boîtes ou logements (11, 11') sont en deux parties (IIa, llb), parties réunies l'une à l'autre par des vis (27).Referring to Figure 4, we see that the boxes or housings (11, 11 ') are in two parts (IIa, llb), parts joined to each other by screws (27).

En se référant à la figure 7, on a représenté à titre exemplatif un dispositif de freinage de secours (28) qui fonctionne automatiquement et qui va intervenir si pour une raison quelconque lors de la descente de la nacelle (1) (et éventuellement la montée bien que cela soit moins important) la vitesse devait dépasser une vitesse déterminée et voulue et sensiblement supérieure à la vitesse lente à laquelle normalement va être entraînée la nacelle (1) par le moteur (2).Referring to Figure 7, there is shown by way of example an emergency braking device (28) which operates automatically and which will intervene if for any reason during the descent of the nacelle (1) (and possibly the ascent although this is less important) the speed had to exceed a determined and desired speed and appreciably higher than the slow speed at which normally the gondola (1) will be driven by the motor (2).

Ce dispositif de freinage de secours (28) va agir comme le dispositif de freinage (8) sur le volant (7) et est également un frein à mâchoire (29, 30) se refermant sous l'action d'un ressort (non visible à la figure 6) mais frein qui en principe est maintenu ouvert par une cale ou étançon (31). Mais cette cale ou étançon (31) est toutefois éjectable et l'on prévoit à cet effet un déclencheur (32), pièce mobile placée au périmètre du volant (7) qui dès lors que la vitesse de cedit volant dépasse une certaine vitesse a tendance à s'écarter du cercle extérieur du volant (9) et va de ce fait frapper la cale ou étançon (31) et l'éjecte de sorte que les mâchoires (29, 30) du frein viennent freiner, puis bloquer le volant (7) ce qui entraîne l'arrêt de la descente de la nacelle (1).This emergency braking device (28) will act as the braking device (8) on the steering wheel (7) and is also a jaw brake (29, 30) closing under the action of a spring (not visible in Figure 6) but brake which in principle is kept open by a wedge or prop (31). But this wedge or prop (31) is however ejectable and there is provided for this purpose a trigger (32), moving part placed at the perimeter of the steering wheel (7) which when the speed of said flywheel exceeds a certain speed tends to move away from the outer circle of the flywheel (9) and will therefore strike the shim or prop (31) and eject it so that the brake shoes (29, 30) come to brake, then lock the flywheel (7 ) which causes the descent of the nacelle (1) to stop.

Il y a lieu de remarquer qu'il y a en quelque sorte un troisième moyen de freinage en plus que deux déjà indiqués; en effet, le coupleur-inverseur (4) va nécessairement déjà sensiblement réduire la vitesse du système d'entraînement si celle-ci devait atteindre une valeur anormale.It should be noted that there is somehow a third means of braking in addition to two already indicated; in fact, the reversing coupler (4) will necessarily already significantly reduce the speed of the drive system if it should reach an abnormal value.

Le fonctionnement de la nacelle est fort simple après avoir mis en marche le moteur (2); pour la faire monter, on pousse du doigt sur le bouton (18) ce qui libère le volant (7) du frein à mâchoires (8), le compresseur, vérin pneumatique (15) enfonçant le ressort (16) et la commande d'un autre vérin pneumatique (non représenté) du coupleur-inverseur (4) de marche, ce qui permet au moteur (2) d'entraîner en rotation les différents bras de transmission (3, 5, 10, 10'), ces derniers (10, 10') entraînant la rotation des noix (12, 12') qui vont s'engrener sur les chaînes (14, 14') ce qui force la montée de la nacelle. A chaque fois que l'on relâche la pression sur le bouton (18), le frein à mâchoires (8) se referme et le coupleur (4) se met au point mort et la nacelle va être freinée puis arrêtée dans sa montée. Pour la faire descendre, on va pousser sur l'autre bouton (18') ce qui libère le volant (7) du frein à mâchoires (8); la commande du coupleur-inverseur (4) de marche sollicitée également par le bouton (18') permet au moteur (2) d'entraîner en rotation (inverse à ce qui est décrit ci-dessus) à une vitesse voulue, les différents bras de transmission (3, 5, 10, 10'), ces derniers entraînant la rotation des noix de levage (12, 12') qui vont s'engrener sur les chaînes (14, 14') ce qui entraîne la descente de la nacelle. Plus particulièrement pour la descente de la nacelle, c'est le coupleur-inverseur (4) qui va limiter, en réduisant et freinant, la vitesse de rotation du moteur et de ce fait, la vitesse de la descente (ou de la montée) de la nacelle (1). A chaque fois que l'on relâche la pression sur le bouton (18'), le frein à mâchoires (8) se referme et la descente de la nacelle est freinée, puis arrêtée.The operation of the nacelle is very simple after starting the engine (2); to raise it, the finger (18) is pushed, which releases the flywheel (7) from the jaw brake (8), the compressor, pneumatic cylinder (15) driving the spring (16) and the control another pneumatic cylinder (not shown) of the reversing coupler (4), which allows the motor (2) to rotate the various transmission arms (3, 5, 10, 10 '), the latter ( 10, 10 ') causing the nuts (12, 12') to rotate which will mesh with the chains (14, 14 ') which will force the ascent of the nacelle. Each time you release the pressure on the button (18), the brake shoe (8) closes and the coupler (4) is put in neutral and the nacelle will be braked then stopped in its rise. To bring it down, we will push the other button (18 ') which releases the flywheel (7) from the jaw brake (8); the command of the reversing coupler (4) also requested by the button (18 ') allows the motor (2) to drive in rotation (opposite to what is described above) at a desired speed, the different arms transmission (3, 5, 10, 10 '), the latter causing the rotation of the lifting nuts (12, 12') which will mesh on the chains (14, 14 ') which will cause the nacelle to descend . More particularly for the descent of the nacelle, it is the reversing coupler (4) which will limit, by reducing and braking, the speed of rotation of the motor and therefore the speed of descent (or ascent). of the nacelle (1). Each time that the pressure on the button (18 ') is released, the jaw brake (8) closes and the descent of the nacelle is braked, then stopped.

Si pour une raison imprévisible, la descente de la nacelle (1) devait se faire à une vitesse dépassant les limites admissibles (ou encore la montée bien que cela soit pratiquement pas possible car en montée, le poids et la charge de la nacelle n'interviennent bien entendu pas), cela aura pour conséquence d'entraîner les noix de levage (12, 12'), les arbres de transmission (10, 10', 5, 3) à des vitesses de rotation supérieures à celles admises et également donc le volant (7) qui à partir d'une vitesse de rotation déterminée, va solliciter le déclencheur (32) qui va éjecter la cale ou étançon (31) et de ce fait entraîner la mise en fonctionnement du dispositif de freinage de secours (28).If for an unforeseeable reason, the descent of the nacelle (1) should be done at a speed exceeding the admissible limits (or even the ascent although this is practically not possible because in uphill, the weight and the load of the nacelle of course not intervene), this will cause the lifting nuts (12, 12 '), the drive shafts (10, 10', 5, 3) to rotate at higher speeds than those allowed and also therefore the flywheel (7) which, from a determined speed of rotation, will request the trigger (32) which will eject the shim or prop (31) and therefore cause the emergency braking device (28) to operate ).

Comme déjà indiqué, afin d'éviter que la nacelle (1) ne vienne brutalement s'arrêter lorsqu'elle est en fin de course, tant en montée (extrémité supérieure des chaînes (14, 14'» qu'en descente (au sol), les cliquets (25, 2s et 25', 26') vont solliciter juste avant la fin de course les soupapes (23, 24 et 23', 24'), ce qui va entraîner une décompression du compresseur, vérin pneumatique (15), par échappement de l'air et de ce fait la fermeture du dispositif de freinage (8) et l'arrêt de la montée ou la descente de la nacelle (1).As already indicated, in order to prevent the nacelle (1) from suddenly coming to a stop when it is at the end of its travel, both when climbing (upper end of the chains (14, 14 '”and downhill (on the ground) ), the pawls (25, 2s and 25 ', 26') will stress the valves (23, 24 and 23 ', 24') just before the end of the stroke, which will cause the compressor, pneumatic cylinder (15) to decompress ), by escaping the air and thereby closing the braking device (8) and stopping the ascent or descent of the nacelle (1).

De plus, par exemple, le coupleur-inverseur hydraulique (4) de la nacelle peut être muni d'un système de dérivation (by-pass) permettant un réglage limitateur par rapport à la charge maximum admise; ce système peut d'ailleurs s'appliquer également à tout autre dispositif de levage où il est également indispensable de prévoir cette adaptation. Par ailleurs, les vérins pneumatiques pour libérer le dispositif de freinage (8) comme pour commander le coupleur-inverseur (4) peuvent être soit à pression, soit à décompression.In addition, for example, the hydraulic reversing coupler (4) of the nacelle can be provided with a bypass system (bypass) allowing a limiting adjustment relative to the maximum permitted load; this system can also apply to any other lifting device where it is also essential to provide this adaptation. Furthermore, the pneumatic cylinders for releasing the braking device (8) as for controlling the reversing coupler (4) can be either pressure or decompression.

En se référant aux différentes figures, on a représenté en outre, par (33, 33') (figure 2) deux paliers par lesquels le châssis flottant (34), portant le moteur (2) et les autres éléments (3, 4, 7, 8, 6), est tenu à la structure de la nacelle (non représentée).Referring to the various figures, there is also shown, by (33, 33 ′) (FIG. 2) two bearings by which the floating chassis (34), carrying the motor (2) and the other elements (3, 4, 7, 8, 6), is held to the structure of the nacelle (not shown).

En se référant plus particulièrement à la figure 3, on voit que le châssis flottant (34) est susceptible de descendre du côté où il est libre, c'est-à-dire côté opposé aux paliers (33, 33'), selon la flèche (35), est maintenu normalement à l'horizontal par un système de balance composé d'un fléau (36), tenu en un point (37) directement ou par l'intermédiaire d'un bras (38) à la structure de la nacelle (non représentée). Un côté du fléau (36') est relié au châssis flottant (34) et de l'autre côté il comporte un contre- poids (40). La valeur de ce contre-poids (40) est déterminée par la charge que l'on souhaite admettre sur la nacelle en fonctionnement.Referring more particularly to FIG. 3, it can be seen that the floating frame (34) is capable of descending on the side where it is free, that is to say on the side opposite the bearings (33, 33 '), according to the boom (35), is normally maintained horizontally by a balance system composed of a beam (36), held at a point (37) directly or via an arm (38) to the structure of the nacelle (not shown). One side of the beam (36 ') is connected to the floating frame (34) and on the other side it has a counterweight (40). The value of this counterweight (40) is determined by the load which it is desired to admit on the nacelle in operation.

Lorsque cette charge prévue et déterminée est dépassée, la puissance exigée au moteur (2) va entraîner la descente selon la flèche (35) du châssis flottant (34), ce qui amène par contre la montée selon la flèche (41) du fléau portant le poids (40). Sur le fléau (36) repose un bras (42) muni d'une roulette (43) qui va également se redresser vers l'horizontal entraînant par l'intermédiaire d'un interrupteur (schématiquement représenté par la boîte (44», l'arrêt du moteur (2).When this planned and determined load is exceeded, the power required of the motor (2) will cause the descent according to the arrow (35) of the floating chassis (34), which on the other hand brings about the rise according to the arrow (41) of the carrying beam the weight (40). On the beam (36) rests an arm (42) provided with a roller (43) which will also straighten towards the horizontal, driving via a switch (schematically represented by the box (44 ", the engine stop (2).

Cet interrupteur (44) est relié à une commande de claxon (non représentée) qui, en cas d'arrêt, informe aussi, par sa mise en marche, qu'il s'agit d'un arrêt dû à une surcharge.This switch (44) is connected to a horn control (not shown) which, in the event of a stop, also informs, by switching it on, that it is a stop due to an overload.

En se référant à la figure 8, on voit le cadre (44, 44', 44") placé sous la structure de la nacelle (1) et tenu en pivotement aux points (45, 45') extérieurs de la nacelle (c'est-à-dire du côté opposé de la nacelle, se déplaçant face au bâtiment); lorsque la nacelle descend, le cadre vient frapper contre tout élément fixe qu'il rencontre (une fenêtre ouverte vers l'extérieur par exemple) et remonte selon la flèche (46) et rencontre un bras (47) portant une roulette (48) qui, lorsque le bras est ramené vers l'horizontal, agit sur un interrupteur, schématiquement représenté par la boîte (49), qui va entraîner l'arrêt du moteur (2) et de ce fait l'arrêt de la nacelle.Referring to FIG. 8, we see the frame (44, 44 ', 44 ") placed under the structure of the nacelle (1) and pivotally held at the points (45, 45') outside of the nacelle (c ' i.e. on the opposite side of the nacelle, moving in front of the building); when the nacelle descends, the frame strikes against any fixed element it encounters (a window open towards the outside for example) and rises according to the arrow (46) and meets an arm (47) carrying a caster (48) which, when the arm is brought back to the horizontal, acts on a switch, diagrammatically represented by the box (49), which will cause the engine (2) to stop and therefore stop Platform.

A la figure 5, on a représenté en outre un dispositif complémentaire d'asservissement de la chaîne (14') qui n'est pas directement entraînée par le bras de transmission (10') mais par un système complémentaire qui comporte une noix (50) en plus, une chaîne complémentaire (5.1) relayant le mouvement de cette noix (50) aux trois autres noix (13a, 12, 13b) de sorte à éviter du mou dans la chaîne (14').In FIG. 5, there is also shown a complementary chain control device (14 ') which is not directly driven by the transmission arm (10') but by a complementary system which includes a nut (50 ) in addition, a complementary chain (5.1) relaying the movement of this nut (50) to the other three nuts (13a, 12, 13b) so as to avoid slack in the chain (14 ').

Bien entendu, l'invention n'est pas limitée aux formes de réalisation décrites et représentées et l'on pourrait bien entendu prévoir différentes variantes, notamment en ce qui concerne le dispositif de balance, par exemple prévoir que l'un des fléaux agisse directement sur un interrupteur, prévoir que le poids peut être déplacé sur un fléau muni d'une graduation déterminant différentes charges admissibles.Of course, the invention is not limited to the embodiments described and shown and it would of course be possible to provide different variants, in particular as regards the balance device, for example providing that one of the plagues acts directly on a switch, provide that the weight can be moved on a beam fitted with a scale determining different admissible loads.

De même, le cadre placé sous la nacelle, pourrait être d'une autre forme, monté de manière différente sous la nacelle et agir directement sur un interrupteur.Similarly, the frame placed under the nacelle, could be of another shape, mounted differently under the nacelle and act directly on a switch.

Claims (15)

1. Engin de levage en particulier nacelle (1) généralement rectangulaire, motorisée, suspendue et appelée à se déplacer de bas en haut et inversement le long d'une façade ou édifice, caractérisée en ce que d'une part, en son centre longitudinal sont alignés un moteur (2) pouvant s'accoupler par un premier arbre de transmission (3) à un coupleur-inverseur (4) par exemple commandé par un vérin pneumatique, coupleur qui est relié par un deuxième arbre (5) à une boîte (6) comportant un réducteur, destiné à renvoyer à angle droit le mouvement moteur, et deuxième arbre de transmission (3) portant interposé, entre le coupleur-inverseur (4) et la boîte (6) contenant le réducteur, un volant (7) solidaire de cedit arbre qui peut être ralenti et bloqué par un dispositif de freinage (8) à mâchoires (9, 9') prenant sur le volant dont l'ouverture n'est obtenue que par la pression sur un moyen de commande, et boîte contenant ce réducteur qui, d'autre part, entraîne, perpendiculairement à l'alignement transversal, de part et d'autre, un troisième arbre de transmission (10, 10') aux extrémités desquelles est placée une noix de levage (12) sur laquelle prend à chaque fois une chaîne (14, 14') accrochée le long d'un bâtiment.1. Lifting device in particular nacelle (1) generally rectangular, motorized, suspended and called to move from bottom to top and vice versa along a facade or building, characterized in that on the one hand, in its longitudinal center are aligned a motor (2) which can be coupled by a first transmission shaft (3) to a reversing coupler (4) for example controlled by a pneumatic cylinder, coupler which is connected by a second shaft (5) to a box (6) comprising a reduction gear, intended to return the motor movement at right angles, and second transmission shaft (3) bearing interposed, between the reversing coupler (4) and the box (6) containing the reduction gear, a flywheel (7 ) integral with said shaft which can be slowed down and blocked by a brake device (8) with jaws (9, 9 ′) taking on the steering wheel, the opening of which is obtained only by pressure on a control means, and box containing this reducer which, on the other hand, drives, perpendicular to the alignment transverse, on both sides, a third drive shaft (10, 10 ') at the ends of which is placed a lifting nut (12) on which each time takes a chain (14, 14') hung along 'a building. 2. Engin de levage suivant la revendication 1, cararctérisé en ce que le moteur (2) est un moteur à double sens de rotation, ce qui rend le coupleur-inverseur inutile et par exemple un moteur électrique monophasé.2. Lifting device according to claim 1, characterized in that the motor (2) is a motor with two directions of rotation, which makes the reversing coupler useless and for example a single-phase electric motor. 3. Engin de levage en particulier nacelle selon la revendication 1, caractérisée en ce que le moteur (2) est à simple sens de rotation, mais il va entraîner tant la montée que la descente de la nacelle.3. Lifting device in particular nacelle according to claim 1, characterized in that the motor (2) is a simple direction of rotation, but it will cause both the rise and the descent of the nacelle. 4. Engin de levage en particulier nacelle selon l'une quelconque des revendications 1 à 3, caractérisée en ce que le dispositif de freinage (8) est sollicité par un ressort (16) qui tend normalement à refermer les mâchoires (9, 9') à moins que l'on compresse le ressort (16) ce que l'on prévoit de pouvoir faire au moyen d'un compresseur, vérin pneumatique.4. Lifting device in particular nacelle according to any one of claims 1 to 3, characterized in that the braking device (8) is biased by a spring (16) which normally tends to close the jaws (9, 9 ' ) unless the spring (16) is compressed, which it is intended to be able to do by means of a compressor, pneumatic cylinder. 5. Engin de levage selon la revendication 2, caractérisé en ce que le moteur (2) électrique comporte un frein magnétique en cas de coupure du courant.5. Lifting device according to claim 2, characterized in that the electric motor (2) comprises a magnetic brake in the event of a power cut. 6. Engin de levage en particulier nacelle selon l'une quelconque des revendications 1 à 5, caractérisée en ce qu'un deuxième dispositif de freinage de secours (28) peut agir sur le volant, dispositif qui intervient dès que le volant (7) est entraîné à une vitesse sensiblement plus grande que la vitesse voulue, le volant (7) comportant à cet effet une pièce (32) qui selon le principe de la masselotte va se dégager du cercle formé par le volant et libérer le deuxième dispositif de freinage de secours.6. Lifting device in particular nacelle according to any one of claims 1 to 5, characterized in that a second emergency braking device (28) can act on the steering wheel, device which intervenes as soon as the steering wheel (7) is driven at a speed substantially greater than the desired speed, the flywheel (7) comprising for this purpose a part (32) which according to the principle of the counterweight will disengage from the circle formed by the flywheel and release the second braking device rescue. 7. Engin de levage en particulier nacelle selon la revendication 6, caractérisée en ce que le dispositif de freinage de secours (28) est un frein à mâchoires, se refermant sur le volant (7) sous l'action d'un ressort (16) qui, en principe, est maintenu ouvert par une cale ou étançon (31) éjectable au moyen d'un déclencheur (32), pièce mobile placée au périmètre du volant (7) et qui dès lors que la vitesse du volant s'accroît au-dessus d'une vitesse déterminée, a tendance à s'écarter du cercle extérieur du volant (7) et va de ce fait pouvoir venir frapper la cale ou étançon (31) et l'éjecter.7. Lifting device in particular nacelle according to claim 6, characterized in that the emergency braking device (28) is a jaw brake, closing on the steering wheel (7) under the action of a spring (16 ) which, in principle, is kept open by a wedge or prop (31) ejectable by means of a trigger (32), moving part placed at the perimeter of the steering wheel (7) and which as soon as the speed of the steering wheel increases above a determined speed, tends to deviate from the outer circle of the flywheel (7) and will therefore be able to strike the wedge or prop (31) and eject it. 8. Engin de levage en particulier nacelle selon les revendications 1 à 7, caractérisée en ce que la noix de levage (12, 12') ou d'entraînement qui termine le troisième arbre de transmission (10, 10') et noix sur laquelle prend la chaîne (14, 14'), est placée dans un logement ou boîte (11, lla) tel que la chaîne (14, 14') ne peut se déboîter de la noix de levage (12) par un quelconque mou à la chaîne; par ailleurs, si cette noix de levage n'est pas centrée sur le côté latéral transversal de la nacelle (1), on prévoit une ou deux noix directionnelles (13a, 13b), dentées superposées et placées dans l'alignement central transversal de la nacelle (1), l'une étant plus haute et l'autre plus basse que la noix d'entraînement (12); de préférence, ces deux noix (13a, 13b) sont également prévues dans le même logement ou boîte (11, Ila) et en outre entraînées solidairement par un jeu de chaînes (51) et une noix complémentaire (50).8. Lifting machine in particular nacelle according to claims 1 to 7, characterized in that the lifting nut (12, 12 ') or drive which terminates the third transmission shaft (10, 10') and nut on which takes the chain (14, 14 '), is placed in a housing or box (11, lla) such that the chain (14, 14') cannot disengage from the lifting nut (12) by any slack in the chain; moreover, if this lifting nut is not centered on the transverse lateral side of the nacelle (1), one or two directional nuts (13a, 13b) are provided, toothed superimposed and placed in the transverse central alignment of the nacelle (1), one being higher and the other lower than the drive nut (12); preferably, these two nuts (13a, 13b) are also provided in the same housing or box (11, Ila) and furthermore driven integrally by a set of chains (51) and a complementary nut (50). 9. Engin de levage en particulier nacelle selon l'une quelconque des revendications 1 à 8, caractérisée en ce qu'elle comporte un tableau de commande à deux boutons-poussoir revenant automatiquement en position de départ et qui respectivement lorsqu'ils sont poussés, ouvrent les mâchoires (9, 9') du frein (8).9. Lifting device, in particular a nacelle according to any one of claims 1 to 8, characterized in that it comprises a control panel with two push-buttons automatically returning to the starting position and which respectively when they are pushed, open the brake shoes (9, 9 ') (8). 10. Engin de levage en particulier nacelle selon l'une quelconque des revendications 1 à 9, caractérisée en ce que le compresseur, vérin pneumatique, est relié à une ou deux paires de soupapes (23, 24 et 23', 24'), placées sur le passage de la ou des chaînes (14, 14'), l'une à la partie supérieure, l'autre à la partie inférieure de la nacelle (1) et soupapes qui peuvent être solicitées par une ou des paires de cliquets (25, 26 et 25', 26') fixés sur les chaînes (14, 14'), l'un à l'extrémité supérieure près de son ou ses deux points d'accrochage, l'autre à l'extrémité inférieure près de l'endroit où la ou les chaînes reposent sur le sol.10. Lifting device, in particular a nacelle according to any one of claims 1 to 9, characterized in that the compressor, pneumatic cylinder, is connected to one or two pairs of valves (23, 24 and 23 ', 24'), placed on the passage of the chain (s) (14, 14 '), one at the top, the other at the bottom of the nacelle (1) and valves which can be solicited by one or pairs of pawls (25, 26 and 25 ', 26') fixed on the chains (14, 14 '), one at the upper end near its one or two hooking points, the other at the lower end near where the chain (s) rest on the ground. 11. Engin de levage selon l'une quelconque des revendications 1 à 10, caractérisé en ce que les chaînes sont du type à rouleaux, avec plaquettes et axes, du type Galle, ou chaînes à vélo, chaînes marines, chaînes à maillons.11. Lifting machine according to any one of claims 1 to 10, characterized in that the chains are of the roller type, with plates and pins, of the Galle type, or bicycle chains, marine chains, link chains. 12. Engin de levage selon l'une quelconque des revendications 1 à 11, caractérisé en ce qu'il comporte un châssis flottant (34) sur lequel pose au moins le moteur (2) et châssis flottant (34) tenu d'un côté par deux paliers (33, 31') à l'arbre de transmission principal (3) et pourvu du côté opposé d'un système de balance à contre-poids (40) d'une valeur déterminée par la charge maximum que l'on souhaite admettre sur l'engin et qui maintient normalement le châssis flottant plus ou moins parallèlement au plancher de l'engin, mais, de sorte qu'en cas de surcharge, le moteur s'affaissant, le châssis flottant (34), s'incline, et le contre-poids (40) en balance, va directement ou par l'intermédiaire d'un élément reposant sur lui ou le côté de la partie de la balance portant le bras, couper par l'intermédiaire d'un interrupteur, le fonctionnement du moteur et de ce fait, l'arrêt de l'engin.12. Lifting device according to any one of claims 1 to 11, characterized in that it comprises a floating chassis (34) on which rests at least the motor (2) and floating chassis (34) held on one side by two bearings (33, 31 ') to the main drive shaft (3) and provided on the opposite side with a counterweight system (40) of a value determined by the maximum load which is wishes to admit on the machine and which normally maintains the floating chassis more or less parallel to the floor of the machine, but, so that in the event of an overload, the engine subsides, the floating chassis (34), s' inclines, and the counterweight (40) in balance, goes directly or by the intermediary of an element resting on it or the side of the part of the balance carrying the arm, cut by means of a switch, the operation of the engine and therefore the stopping of the machine. 13. Engin de levage selon la revendication 12, caractérisé en ce que le système de balance est du type balance à fléau (34) tenue et fixée à la structure de l'engin.13. Lifting machine according to claim 12, characterized in that the balance system is of the beam balance type (34) held and fixed to the structure of the machine. 14. Engin selon l'une quelconque des revendications 12 et 13, caractérisé en ce que l'interrupteur provoquant l'arrêt de l'engin en cas de surcharge, commande dans ce cas la mise en marche d'un signal, un claxon par exemple.14. Machine according to any one of claims 12 and 13 , characterized in that the switch causing the stop of the machine in the event of overload, controls in this case the starting of a signal, a horn by example. 15. Engin de levage selon l'une quelconque des revendications 1 à 14, caractérisé en ce que l'engin est pourvu en-dessous de lui, d'un bras ou cadre (44) flottant librement à quelques centimètres sous l'engin et bras ou cadre (44) qui, lorsqu'il rencontre un obstacle, va remonter par rapport à l'engin et entraîner par l'intermédiaire d'un interrupteur (49) l'arrêt de l'engin.15. Lifting machine according to any one of claims 1 to 14, characterized in that the machine is provided below it, an arm or frame (44) floating freely a few centimeters under the machine and arm or frame (44) which, when it encounters an obstacle, will rise relative to the machine and cause the machine to stop by means of a switch (49).
EP19840870025 1983-02-24 1984-02-20 Lifting device, in particular a working-platform Expired EP0117862B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84870025T ATE39467T1 (en) 1983-02-24 1984-02-20 LIFTING DEVICE, PARTICULARLY WORK PLATFORM.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
BE896004 1983-02-24
BE896004 1983-02-24
BE897720 1983-09-09
BE0/211502A BE897720R (en) 1983-09-09 1983-09-09 Bracket hoist mechanism for building engineering - uses bidirectional electric motor meshing with chains to drive bucket up and down building wall

Publications (3)

Publication Number Publication Date
EP0117862A2 true EP0117862A2 (en) 1984-09-05
EP0117862A3 EP0117862A3 (en) 1985-10-09
EP0117862B1 EP0117862B1 (en) 1988-12-28

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19840870025 Expired EP0117862B1 (en) 1983-02-24 1984-02-20 Lifting device, in particular a working-platform

Country Status (2)

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EP (1) EP0117862B1 (en)
DE (1) DE3475772D1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4869341A (en) * 1987-09-21 1989-09-26 Fitzgerald Frederick P Automatic control of work platforms
EP0876987A1 (en) * 1997-05-06 1998-11-11 Kyung-Joo Kim Outside up-down elevator
NL1008092C2 (en) * 1998-01-22 1999-07-26 Ltf Transporttechniek Bv Goods lift for retail shop
NL1010908C2 (en) * 1998-12-28 2000-06-30 Altrex Bv Lift car guide system.
WO2009082412A1 (en) * 2007-12-24 2009-07-02 Franklin Samuel H Elevator climbing system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102605941A (en) * 2012-03-23 2012-07-25 河北杭萧钢构有限公司 Enclosing shield hoisting platform

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1615182A (en) * 1926-09-07 1927-01-18 James L Thorne Painter's scaffold
US2649280A (en) * 1950-05-31 1953-08-18 Steel Products Eng Co Chain hoist mechanism
US3237718A (en) * 1964-05-13 1966-03-01 Ederer Corp Two-sided suspension system for staging
DE2339669A1 (en) * 1973-08-04 1975-02-27 Walter Boczek Erection equipment for nucler reactor - with two lifting units used separately or together at variable lifting speeds
US4177973A (en) * 1978-03-06 1979-12-11 Ederer Incorporated Cable drum safety brake
EP0009058A1 (en) * 1978-09-25 1980-04-02 Plumettaz Sa Suspending apparatus for a facade's maintenance platform

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1615182A (en) * 1926-09-07 1927-01-18 James L Thorne Painter's scaffold
US2649280A (en) * 1950-05-31 1953-08-18 Steel Products Eng Co Chain hoist mechanism
US3237718A (en) * 1964-05-13 1966-03-01 Ederer Corp Two-sided suspension system for staging
DE2339669A1 (en) * 1973-08-04 1975-02-27 Walter Boczek Erection equipment for nucler reactor - with two lifting units used separately or together at variable lifting speeds
US4177973A (en) * 1978-03-06 1979-12-11 Ederer Incorporated Cable drum safety brake
EP0009058A1 (en) * 1978-09-25 1980-04-02 Plumettaz Sa Suspending apparatus for a facade's maintenance platform

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4869341A (en) * 1987-09-21 1989-09-26 Fitzgerald Frederick P Automatic control of work platforms
EP0876987A1 (en) * 1997-05-06 1998-11-11 Kyung-Joo Kim Outside up-down elevator
NL1008092C2 (en) * 1998-01-22 1999-07-26 Ltf Transporttechniek Bv Goods lift for retail shop
NL1010908C2 (en) * 1998-12-28 2000-06-30 Altrex Bv Lift car guide system.
EP1016616A1 (en) * 1998-12-28 2000-07-05 Altrex B.V. Lift cage guidance system
US7975807B2 (en) 2004-01-20 2011-07-12 Franklin Samuel H Elevator climbing system
WO2009082412A1 (en) * 2007-12-24 2009-07-02 Franklin Samuel H Elevator climbing system

Also Published As

Publication number Publication date
EP0117862A3 (en) 1985-10-09
EP0117862B1 (en) 1988-12-28
DE3475772D1 (en) 1989-02-02

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