EP0330642A1 - Mobile ladder basket - Google Patents

Mobile ladder basket Download PDF

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Publication number
EP0330642A1
EP0330642A1 EP89870034A EP89870034A EP0330642A1 EP 0330642 A1 EP0330642 A1 EP 0330642A1 EP 89870034 A EP89870034 A EP 89870034A EP 89870034 A EP89870034 A EP 89870034A EP 0330642 A1 EP0330642 A1 EP 0330642A1
Authority
EP
European Patent Office
Prior art keywords
nacelle
spring
bar
claws
ladder
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
EP89870034A
Other languages
German (de)
French (fr)
Other versions
EP0330642B1 (en
Inventor
Gilbert Loix
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.)
JOMY SA
Original Assignee
JOMY SA
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 JOMY SA filed Critical JOMY SA
Priority to AT89870034T priority Critical patent/ATE84114T1/en
Publication of EP0330642A1 publication Critical patent/EP0330642A1/en
Application granted granted Critical
Publication of EP0330642B1 publication Critical patent/EP0330642B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C7/00—Component parts, supporting parts, or accessories
    • E06C7/18—Devices for preventing persons from falling
    • E06C7/185—Devices providing a back support to a person on the ladder, e.g. cages
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C7/00—Component parts, supporting parts, or accessories
    • E06C7/16—Platforms on, or for use on, ladders, e.g. liftable or lowerable platforms

Definitions

  • the present invention relates to a nacelle capable of being adapted to a ladder and of being moved along it.
  • This type of basket can be used to perform various works on building facades, more particularly for washing windows from the outside of a building or maintaining a facade.
  • the ladder for this purpose is preferably suspended from a rail, which can be permanently placed, which allows its lateral movement.
  • the nacelle according to the invention is conventionally constituted by a platform mounted on a chassis and comprising a guard rail constituted for example by one or more hoops.
  • the chassis can move, like a trolley, along the ladder in an essentially vertical position.
  • the nacelle can be moved in height by sliding or rolling on the uprights of the ladder, preferably in the latter case via a set of rollers, possibly comprising appropriate grooves, and placed on either side amounts of the ladder, for example at the front and at the rear.
  • the nacelle will be held at a fixed height by one or more locking or support lugs or claws bearing on a rung and projecting from it. It will preferably be two claws situated at the ends of an element integral with the nacelle, for example a horizontal tube.
  • the claws can partially pivot around a horizontal axis under the action of the operator to allow free movement, up or down, of the nacelle. The claws can then be released when the basket is at the desired height.
  • the nacelle according to the invention has the particularity of offering an improved level of security compared to other known devices.
  • the nacelle according to the invention is characterized in fact by the presence of a safety blocking mechanism which prevents the nacelle from falling if, during a movement maneuver along the ladder, the operator releases the traction means which 'it operates.
  • the operator places himself on one of the upper rungs and pulls vertically on a bar, possibly provided with a rope or other equivalent means of traction.
  • Said bar drives through a first spring the release of the claws by rotating the axis on which they are fixed. The release of the claws being acquired, these being out of the plane of the rungs, the bar then drives the nacelle in its upward or downward movement.
  • Said bar in fact comprises a lateral buttonhole whose length is calculated so that the lower part forming a stop, following the aforementioned movement, comes into contact with an element secured to the nacelle. The gondola is then free to slide or roll along the ladder uprights. The operator manually lowers or lifts the traction means and therefore the platform.
  • the operator When the platform has reached the desired height, that is to say for example at a level immediately above or below the initial level, the operator while maintaining a force to retain the platform, actuates a second vertical bar by exerting a downward pressure, preferably with his foot, to bring the claws into the locking position using the device described below with reference to the drawings.
  • the lifting force can then be interrupted and the nacelle will take support, via the claws, on the desired rung. The operator can then take place on board the nacelle to carry out his work.
  • a mobile nacelle on the uprights of a ladder characterized in that it includes support claws on a rung capable of being disengaged under the effect of an upward traction transmitted by the 'intermediate a movable bar and a spring, and a blocking means capable of engaging the claw in the support position by downward movement of a bar, said blocking means further comprising a spring attached on the one hand to the bar and on the other hand to an element integral with the nacelle, a spring which will be stretched or compressed when the claws are disengaged.
  • Figure 1a is a perspective view of the movement mechanism of the nacelle, the latter being in the rest position.
  • the bar 4 is in partially broken view showing the internal spring 6.
  • the blocking effected on one of the steps is shown in side view in FIG 1b; according to a section passing through the middle of the rungs.
  • Figure 2a is the corresponding view of said mechanism in the free position, that is to say after unlocking the claws by folding as shown in side view in Figure 2b, and therefore being able to slide freely under the action of the operator.
  • Figure 3 is a view of said mechanism in the locking position at a height which, after movement along the uprights, may be different from that illustrated in Figure 1.
  • the nacelle now rests on the rung 15 ′.
  • Figure 1 illustrates the mechanism of the invention at rest, the scale and the non-active elements of the nacelle being shown in dotted lines.
  • the claws 1 and 2 are supported on a rung 15 and the nacelle rests on the scale by gravity.
  • a first spring 5, of the vertical bar 3 in tubular form and comprising two lateral buttonholes 11 and 11 ′ of sufficient length not to entrain the elements 9 and 10 integral with the nacelle before the complete disengagement of the claws .
  • the upper ends of the buttonholes rest on the elements 9 and 10.
  • the spring 5 is fixed on the bar 3 on the one hand and on the other hand on a horizontal bar 7 secured to the claws 3 and 4, by means of the arms 13 and 13 ′ but located on the other side of the horizontal bar 9 acting as a tilting axis.
  • the extensions 21 and 21 ′ of the bar 7 rest on the frame of the nacelle and therefore prevent the bar 7 from tipping down. Bars 7 and 9 are approximately in the same plane. By pulling upwards the bar 7 is therefore capable of tilting said claws 1 and 2 out of the plane of the steps.
  • the bar 4 also comprises two buttonholes 12 and 12 ′ of the same height and crossed respectively by the elements 10 and 9. In the vicinity of the lower end of the bar 4 is a lug or an angle 8 bearing on the bar 7.
  • the nacelle is therefore at rest bearing on the rung 15 by means of the locking claws 1 and 2 and maintained along the uprights, in this embodiment, by the 8 casters 16.
  • the spring 6 rests on the bottom of the bar 4, below the horizontal element 9.
  • Figure 2 illustrates the nacelle according to the invention in the free position, it can then move up or down freely along the uprights of the ladder.
  • the operator pulled the bar 3 vertically upwards (arrow A), for example by means of a cord fixed to the eyelet present at the upper end of this bar.
  • the spring 5 rotated the bar 7 (arrow C) as well as the arms 13 and 13 ′ and the claws 1 and 2 have tilted, thus no longer resting on a rung.
  • the bar 7 is in fact capable of pivoting upwards around the axis constituted by the bar 9 to an extent just sufficient to disengage the claws, that is to say place them outside the plane of the rungs.
  • the elements 9 and 10 initially in the upper parts of the buttonholes find themselves in abutment with the lower parts and the nacelle secured to these elements is therefore suspended by the traction means 3.
  • the nacelle can be lowered or mounted at the discretion of the operator (arrow B) which is on one of the upper rungs of the ladder.
  • the pivoting to disengage the claws 1 and 2 has driven the bar 4 upwards via the angle iron 8.
  • the spring 6 fixed on the one hand to this bar 4 and on the other hand to the element 9 secured to the basket is then stretched.
  • the spring 5 must be able to tension the spring 6 and therefore must have a higher restoring force.
  • FIG. 3 illustrates the placing in the blocking position of the nacelle according to the invention, for example at another height corresponding to rung 15 ′ adjacent or not to rung 15.
  • the operator does this while maintaining the bar 3 and thus supporting the weight of the nacelle, exerts a downward pressure on the bar 4 (arrow D) the latter descends and, by means of the angle iron 8, folds down the bar 7 bringing back the claws 1 and 2 in the blocking position on a rung 15 ′, different from 15.
  • the bar 3 can then be released and the nacelle is blocked by gravity at the desired height. The operator can then go down there to do his work safely.
  • FIG. 3 also shows the presence of the spring 6, the function of which is, in the event of the bar 3 being released by the operator during an operation of moving the nacelle, to immediately return the claws to the blocking position.
  • the spring 6, attached on the one hand to the bar 4 and on the other hand to the element 9 integral with the nacelle, will indeed immediately bring the bar 4 down, bar which by means of the angle 8 will swing the claws into the locked position.
  • FIG. 4 is an overall view of the complete nacelle 18 in the operating position on a ladder 17 suspended from a rail 19 and comprising at its base stabilization means 20.
  • the structure of the nacelle, and in particular that of the bars 3 and 4 is preferably tubular, for example made up of hollow aluminum tubes, square or rectangular.
  • the whole of the nacelle is obviously preferably made of light metal, such as aluminum alloy.
  • the basket of the invention can weigh from 10 to 20 kg and can be separated from the scale, for example, by sliding it out of the upper end of the scale.
  • the modular nature of the device is a significant advantage.
  • permanent rails are preferably provided so as to be able to fix a ladder and then a nacelle according to the invention.
  • Such a scale can measure up to 20 meters and more.
  • bumpers are preferably provided, preventing the lower wheels of the nacelle from going beyond the lower end of the uprights.
  • Removable stabilization means mounted on casters can also be provided as shown in FIG. 4.
  • tubes 3 and 4 may not include buttonholes surrounding one or more parts of the chassis of the nacelle but sliding between two stops in a bearing secured to this chassis.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ladders (AREA)
  • Vehicle Step Arrangements And Article Storage (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)

Abstract

The basket comprises claws (1, 2) for support on a ladder (15) capable of being disengaged under the effect of an upward traction transmitted by means of a movable bar (3) and a spring (5). A locking means is provided which is capable of engaging the claw in the support position by a downward movement of a bar (4) which is movable with respect to the chassis of the basket. The locking means furthermore comprises a spring (6) attached on the one hand to the bar (4) and on the other hand to an element (9) integral with the basket, this spring being stretched or compressed when the claws (1, 2) are disengaged. <IMAGE>

Description

La présente invention concerne une nacelle capable d'être adaptée à une échelle et d'être déplacée le long de celle-ci.The present invention relates to a nacelle capable of being adapted to a ladder and of being moved along it.

Ce type de nacelle peut être utilisée pour effectuer divers travaux à des façades de bâtiment, plus particulièrement pour le lavage de vitres par l'extérieur d'un bâtiment ou l'entretien d'une façade. L'échelle à cette fin est de préférence suspendue a un rail, qui peut être plaçé en permanence, ce qui permet son déplacement latéral.This type of basket can be used to perform various works on building facades, more particularly for washing windows from the outside of a building or maintaining a facade. The ladder for this purpose is preferably suspended from a rail, which can be permanently placed, which allows its lateral movement.

La nacelle selon l'invention est constituée de manière classique d'une plate-forme montée sur un chassis et comportant un garde fou constitué par exemple de un ou plusieurs arceaux. Le chassis peut se déplacer, tel un chariot, le long de l'échelle en position essentiellement verticale.The nacelle according to the invention is conventionally constituted by a platform mounted on a chassis and comprising a guard rail constituted for example by one or more hoops. The chassis can move, like a trolley, along the ladder in an essentially vertical position.

La nacelle peut être déplacée en hauteur en coulissant ou roulant sur les montants de l'échelle, de préférence dans ce dernier cas par l'intermédiaire d'un jeu de roulettes, éventuellement comportant des gorges appropriées, et plaçées de part et d'autres des montants de l'échelle, par exemple à l'avant et à l'arrière.The nacelle can be moved in height by sliding or rolling on the uprights of the ladder, preferably in the latter case via a set of rollers, possibly comprising appropriate grooves, and placed on either side amounts of the ladder, for example at the front and at the rear.

La nacelle sera maintenue à une hauteur fixe par un ou plusieurs ergots ou griffes de blocage ou de soutien prenant appui sur un échelon et situés en saillie. Il s'agira de préférence de deux griffes situées aux extrémités d'un élément solidaire de la nacelle, par exemple un tube horizontal. Les griffes peuvent pivoter partiellement autour d'un axe horizontal sous l'action de l'opérateur afin de permettre le libre mouvement­,ascendant ou descendant, de la nacelle. Les griffes peuvent alors être relâchées lorsque la nacelle se trouve à la hauteur désirée.The nacelle will be held at a fixed height by one or more locking or support lugs or claws bearing on a rung and projecting from it. It will preferably be two claws situated at the ends of an element integral with the nacelle, for example a horizontal tube. The claws can partially pivot around a horizontal axis under the action of the operator to allow free movement, up or down, of the nacelle. The claws can then be released when the basket is at the desired height.

La nacelle selon l'invention présente la particularité d'offrir un niveau de sécurité amélioré par rapport aux autres dispositifs connus.The nacelle according to the invention has the particularity of offering an improved level of security compared to other known devices.

La nacelle selon l'invention se caractérise en effet par la présence d'un mécanisme de blocage de sécurité qui empêche la nacelle de tomber si, durant une manoeuvre de déplacement le long de l'échelle, l'opérateur lâche les moyens de traction qu'il actionne.The nacelle according to the invention is characterized in fact by the presence of a safety blocking mechanism which prevents the nacelle from falling if, during a movement maneuver along the ladder, the operator releases the traction means which 'it operates.

De manière plus détaillée, lorsque la hauteur sur l'échelle doit être modifiée, l'opérateur se place sur un des échelons supérieurs et tire verticalement sur une barre, éventuellement munie d'une corde ou un autre moyen de traction équivalent. Ladite barre entraîne par l'intermédiaire d'un premier ressort le déblocage des griffes en faisant pivoter l'axe sur lequel celles-ci sont fixées. Le déblocage des griffes étant acquis, celles-ci étant hors du plan des échelons, la barre entraîne alors la nacelle dans son mouvement ascendant ou descendant. Ladite barre comprend en effet une boutonnière latérale dont la la longueur est calculée de telle sorte que la partie inférieure formant butée, suite au mouvement susmentionné, entre en contact avec un élément solidaire de la nacelle. La nacelle est alors libre pour coulisser ou rouler le long des montants de l'échelle. L'opérateur abaisse ou élève manuellement le moyen de traction et donc la nacelle.In more detail, when the height on the ladder must be modified, the operator places himself on one of the upper rungs and pulls vertically on a bar, possibly provided with a rope or other equivalent means of traction. Said bar drives through a first spring the release of the claws by rotating the axis on which they are fixed. The release of the claws being acquired, these being out of the plane of the rungs, the bar then drives the nacelle in its upward or downward movement. Said bar in fact comprises a lateral buttonhole whose length is calculated so that the lower part forming a stop, following the aforementioned movement, comes into contact with an element secured to the nacelle. The gondola is then free to slide or roll along the ladder uprights. The operator manually lowers or lifts the traction means and therefore the platform.

Lorsque la nacelle a atteint la hauteur voulue, c'est à dire par exemple au niveau d'un échelon immédiatement supérieur ou inférieur à l'échelon initial, l'opérateur tout en maintenant une force pour retenir la nacelle, actionne une seconde barre verticale en exercant une pression vers le bas , de préférence avec son pied, pour ramener les griffes en position de blocage grâce au dispositif décrit ci-dessous par rapport aux dessins. La force de sustentation peut à ce moment être interrompue et la nacelle prendra appui, par l'intermédiaire des griffes, sur l'échelon désiré. L'opérateur peut alors prendre place à bord de la nacelle pour effectuer son travail.When the platform has reached the desired height, that is to say for example at a level immediately above or below the initial level, the operator while maintaining a force to retain the platform, actuates a second vertical bar by exerting a downward pressure, preferably with his foot, to bring the claws into the locking position using the device described below with reference to the drawings. The lifting force can then be interrupted and the nacelle will take support, via the claws, on the desired rung. The operator can then take place on board the nacelle to carry out his work.

Si par accident, l'opérateur lâche le moyen de traction au cours de l'opération de déplacement de la nacelle, un second ressort qui a été sollicité par traction ou compression lors de l'opération de déblocage, et qui est donc moins fort que le premier, ramène immédiatement par pivotement les griffes en position de blocage. De ce fait, le temps de réaction étant très court, la distance de chute de la nacelle ne sera généralement pas supérieure à la hauteur séparant deux échelons.If by accident, the operator releases the traction means during the operation of moving the nacelle, a second spring which has been stressed by traction or compression during the unlocking operation, and which is therefore less strong than the first, immediately returns the claws by pivoting to the locked position. Therefore, the reaction time being very short, the fall distance of the nacelle will generally not be greater than the height separating two steps.

Selon la présente invention on propose donc une nacelle mobile sur les montants d'une échelle caractérisée en ce qu'elle comporte des griffes de support sur un échelon capable d 'être désengagés sous l'effet d'une traction vers le haut transmise par l'intermédiaire d'une barre mobile et d'un ressort , et un moyen de blocage capable d'engager la griffe en position de support par mouvement vers le bas d'une barre , ledit moyen de blocage comportant en outre un ressort attaché d'une part à la barre et d'autre part à un élément solidaire de la nacelle, ressort qui sera tendu ou comprimé lorsque les griffes seront désengagées.According to the present invention there is therefore provided a mobile nacelle on the uprights of a ladder characterized in that it includes support claws on a rung capable of being disengaged under the effect of an upward traction transmitted by the 'intermediate a movable bar and a spring, and a blocking means capable of engaging the claw in the support position by downward movement of a bar, said blocking means further comprising a spring attached on the one hand to the bar and on the other hand to an element integral with the nacelle, a spring which will be stretched or compressed when the claws are disengaged.

L'invention sera mieux comprise en se référant aux dessins founis à titre d'exemples non-limitatifs.The invention will be better understood by referring to the drawings provided by way of non-limiting examples.

La figure 1a est une vue en perspective du mécanisme de déplacement de la nacelle, celle-ci étant en position de repos. La barre 4 est en vue partiellement brisée montrant le ressort interne 6. Le blocage effectué sur un des échelons est montré en vue latérale dans la fig 1b; selon une section passant par le milieu des échelons.Figure 1a is a perspective view of the movement mechanism of the nacelle, the latter being in the rest position. The bar 4 is in partially broken view showing the internal spring 6. The blocking effected on one of the steps is shown in side view in FIG 1b; according to a section passing through the middle of the rungs.

La figure 2a est la vue correspondante dudit mécanisme en position libre, c'est à dire après déblocage des griffes par rabattement comme montré en vue latérale dans la figure 2b , et pouvant donc librement coulisser sous l'action de l'opérateur.Figure 2a is the corresponding view of said mechanism in the free position, that is to say after unlocking the claws by folding as shown in side view in Figure 2b, and therefore being able to slide freely under the action of the operator.

La figure 3 est une vue dudit mécanisme en position de blocage à une hauteur qui, après mouvement le long des montants, peut être différente de celle illustrée dans la figure 1. La nacelle repose maintenant sur l'échelon 15′.Figure 3 is a view of said mechanism in the locking position at a height which, after movement along the uprights, may be different from that illustrated in Figure 1. The nacelle now rests on the rung 15 ′.

La nacelle selon l'invention et le fonctionnement de celle-ci sont ci-après décrits plus en détail en se référant à ces dessins .The nacelle according to the invention and the operation thereof are described below in more detail with reference to these drawings.

La figure 1 illustre le mécanisme de l'invention au repos, l'échelle et les éléments non actifs de la nacelle étant représentés en pointillé. Les griffes 1 et 2 sont en appui sur un échelon 15 et la nacelle repose sur l'échelle par gravité. 0n notera la présence d'un premier ressort 5 , de la barre 3 verticale sous forme tubulaire et comportant deux boutonnières latérales 11 et 11′ de longueur suffisante pour ne pas entraîner les éléments 9 et 10 solidaires de la nacelle avant le désengagement complet des griffes . Les extrémités supérieures des boutonnières reposent sur les éléments 9 et 10. Le ressort 5 est fixé sur la barre 3 d'une part et d'autre part sur une barre horizontale 7 solidaire des griffes 3 et 4, par l'intermédiaire des bras 13 et 13′ mais situé de l'autre côté de la barre 9 horizontale faisant office d'axe de basculement. Les prolongements 21 et 21′ de la barre 7 reposent sur le bâti de la nacelle et empêchent donc la barre 7 de basculer vers le bas. Les barres 7 et 9 sont approximativement dans un même plan. Par traction vers le haut la barre 7 est donc capable de faire basculer lesdites griffes 1 et 2 hors du plan des échelons.Figure 1 illustrates the mechanism of the invention at rest, the scale and the non-active elements of the nacelle being shown in dotted lines. The claws 1 and 2 are supported on a rung 15 and the nacelle rests on the scale by gravity. We note the presence of a first spring 5, of the vertical bar 3 in tubular form and comprising two lateral buttonholes 11 and 11 ′ of sufficient length not to entrain the elements 9 and 10 integral with the nacelle before the complete disengagement of the claws . The upper ends of the buttonholes rest on the elements 9 and 10. The spring 5 is fixed on the bar 3 on the one hand and on the other hand on a horizontal bar 7 secured to the claws 3 and 4, by means of the arms 13 and 13 ′ but located on the other side of the horizontal bar 9 acting as a tilting axis. The extensions 21 and 21 ′ of the bar 7 rest on the frame of the nacelle and therefore prevent the bar 7 from tipping down. Bars 7 and 9 are approximately in the same plane. By pulling upwards the bar 7 is therefore capable of tilting said claws 1 and 2 out of the plane of the steps.

De même la barre 4 comprend également deux boutonnières 12 et 12′ de même hauteur et traversées respectivement per les éléments 10 et 9. Au voisinage de l'extrémité inférieure de la barre 4 se trouve un ergot ou une cornière 8 prenant appui sur la barre 7.Similarly, the bar 4 also comprises two buttonholes 12 and 12 ′ of the same height and crossed respectively by the elements 10 and 9. In the vicinity of the lower end of the bar 4 is a lug or an angle 8 bearing on the bar 7.

La nacelle est donc au repos en appui sur l'échelon 15 par l'intermédiaire des griffes de blocage 1 et 2 et maintenue le long des montants, dans cette forme de réalisation, par les 8 roulettes 16.The nacelle is therefore at rest bearing on the rung 15 by means of the locking claws 1 and 2 and maintained along the uprights, in this embodiment, by the 8 casters 16.

Selon un mode de réalisation particulier et non illustré, le ressort 6 repose sur le fond de la barre 4, en dessous de l'élément horizontal 9.According to a particular embodiment and not illustrated, the spring 6 rests on the bottom of the bar 4, below the horizontal element 9.

La figure 2 illustre la nacelle selon l'invention en position libre, celle-ci pouvant alors monter ou descendre librement le long des montants de l'échelle. L'opérateur a tiré verticalement vers le haut la barre 3 (flèche A) ,par exemple par l'intermédiaire d'une corde fixée à l'oeillière présente à l'extremité supérieure de cette barre. Ce faisant le ressort 5 a fait pivoter la barre 7 (flèche C ) ainsi que les bras 13 et 13′ et les griffes 1 et 2 ont basculées, ne reposant ainsi plus sur un échelon. La barre 7 est en effet capable de pivoter vers le haut autour de l'axe constitué par la barre 9 dans une mesure juste suffisante pour désengager les griffes c'est-à-dire les placer hors du plan des échelons. Les éléments 9 et 10 initialement dans les parties supérieures des boutonnières se retrouvent en butée avec les parties inférieures et la nacelle solidaire de ces éléments est donc suspendue par le moyen de traction 3. La nacelle peut être descendue ou montée au gré de l'opérateur (flèche B) qui se trouve sur un des échelons supérieurs de l'échelle. Le pivotement pour désengager les griffes 1 et 2 a entrainé la barre 4 vers le haut par l'intermédiaire de la cornière 8. Le ressort 6 fixé d'une part à cette barre 4 et d'autre part à l'élément 9 solidaire de la nacelle est alors tendu.Figure 2 illustrates the nacelle according to the invention in the free position, it can then move up or down freely along the uprights of the ladder. The operator pulled the bar 3 vertically upwards (arrow A), for example by means of a cord fixed to the eyelet present at the upper end of this bar. In doing so the spring 5 rotated the bar 7 (arrow C) as well as the arms 13 and 13 ′ and the claws 1 and 2 have tilted, thus no longer resting on a rung. The bar 7 is in fact capable of pivoting upwards around the axis constituted by the bar 9 to an extent just sufficient to disengage the claws, that is to say place them outside the plane of the rungs. The elements 9 and 10 initially in the upper parts of the buttonholes find themselves in abutment with the lower parts and the nacelle secured to these elements is therefore suspended by the traction means 3. The nacelle can be lowered or mounted at the discretion of the operator (arrow B) which is on one of the upper rungs of the ladder. The pivoting to disengage the claws 1 and 2 has driven the bar 4 upwards via the angle iron 8. The spring 6 fixed on the one hand to this bar 4 and on the other hand to the element 9 secured to the basket is then stretched.

On comprendra que le ressort 5 doit être capable de tendre le ressort 6 et donc doit avoir une force de rappel supérieure.It will be understood that the spring 5 must be able to tension the spring 6 and therefore must have a higher restoring force.

Selon le mode de réalisation particulier déjà mentionné pour la figure 1, au stade décrit dans la figure 2 le ressort 6 est comprimé entre le fond de la barre 4 et l'élément horizontal 8.According to the particular embodiment already mentioned for FIG. 1, at the stage described in FIG. 2 the spring 6 is compressed between the bottom of the bar 4 and the horizontal element 8.

La figure 3 illustre la mise en position de blocage de la nacelle selon l'invention, par exemple à une autre hauteur correspondant à l'échelon 15′ adjacent ou non à l'échelon 15. L'opérateur pour ce faire, tout en maintenant la barre 3 et supportant ainsi le poids de la nacelle, exerce une pression vers le bas sur la barre 4 (flèche D) celle-ci redescend et, par l'intermédiaire de la cornière 8, rabat la barre 7 ramenant les griffes 1 et 2 en position de blocage sur un échelon 15′, différent de 15. La barre 3 peut alors être relâchée et la nacelle est bloquée par gravité à la hauteur désirée. L'opérateur peut alors y descendre pour procéder à son travail en toute sécurité.FIG. 3 illustrates the placing in the blocking position of the nacelle according to the invention, for example at another height corresponding to rung 15 ′ adjacent or not to rung 15. The operator does this while maintaining the bar 3 and thus supporting the weight of the nacelle, exerts a downward pressure on the bar 4 (arrow D) the latter descends and, by means of the angle iron 8, folds down the bar 7 bringing back the claws 1 and 2 in the blocking position on a rung 15 ′, different from 15. The bar 3 can then be released and the nacelle is blocked by gravity at the desired height. The operator can then go down there to do his work safely.

La figure 3 montre également la présence du ressort 6 dont la fonction est, en cas de lâchage de la barre 3 par l'opérateur durant une opération de déplacement de la nacelle, de ramener aussitôt les griffes en position de blocage. Le ressort 6 ,attaché d'une part à la barre 4 et d'autre part à l'élément 9 solidaire de la nacelle, va en effet immediatement ramener la barre 4 vers le bas, barre qui par l'intermédiaire de la cornière 8 fera basculer les griffes en position de blocage.FIG. 3 also shows the presence of the spring 6, the function of which is, in the event of the bar 3 being released by the operator during an operation of moving the nacelle, to immediately return the claws to the blocking position. The spring 6, attached on the one hand to the bar 4 and on the other hand to the element 9 integral with the nacelle, will indeed immediately bring the bar 4 down, bar which by means of the angle 8 will swing the claws into the locked position.

La figure 4 est une vue d'ensemble de la nacelle complète 18 en position de fonctionnement sur une échelle 17 suspendue à un rail 19 et comportant à sa base des moyens de stabilisation 20.FIG. 4 is an overall view of the complete nacelle 18 in the operating position on a ladder 17 suspended from a rail 19 and comprising at its base stabilization means 20.

La structure de la nacelle , et en particulier celle des barres 3 et 4, est de préférence tubulaire, par exemple constitué de tube en aluminium creux, carrés ou rectangulaires. L'ensemble de la nacelle est évidemment de préférence en métal léger, tel de l'aluminium allié.The structure of the nacelle, and in particular that of the bars 3 and 4, is preferably tubular, for example made up of hollow aluminum tubes, square or rectangular. The whole of the nacelle is obviously preferably made of light metal, such as aluminum alloy.

La nacelle de l'invention peut peser de 10 à 20 kg et peut être dissociée de l'échelle , par exemple , en la faisant coulisser hors de l'extrémité supérieure de l'échelle. Le caractère modulaire du dispositif est un avantage appréciable. Pour le lavage des vitres de bâtiments, des rails permanents sont de préférence prévus de facon à pouvoir y fixer une échelle puis une nacelle selon l'invention.The basket of the invention can weigh from 10 to 20 kg and can be separated from the scale, for example, by sliding it out of the upper end of the scale. The modular nature of the device is a significant advantage. For washing the windows of buildings, permanent rails are preferably provided so as to be able to fix a ladder and then a nacelle according to the invention.

Pareille échelle peut mesurer jusqu'a 20 metres et plus. A l'extrémite inférieure de l'échelle il est de préférence prévus des butoirs, empêchant les roues inférieures de la nacelle de dépasser l'extrémité inférieure des montants. Des moyens de stabilisation amovibles montés sur roulettes peuvent être également prévus comme indiqué dans la figure 4.Such a scale can measure up to 20 meters and more. At the lower end of the ladder, bumpers are preferably provided, preventing the lower wheels of the nacelle from going beyond the lower end of the uprights. Removable stabilization means mounted on casters can also be provided as shown in FIG. 4.

D'autres modes de réalisation sont possibles, par exemple il peut y avoir plusieurs tubes 3 et 4. Ces tubes peuvent ne pas comprendre des boutonnières entourant un ou plusieurs parties du chassis de la nacelle mais coulisser entre deux butées dans un palier solidaire de ce chassis .Other embodiments are possible, for example there may be several tubes 3 and 4. These tubes may not include buttonholes surrounding one or more parts of the chassis of the nacelle but sliding between two stops in a bearing secured to this chassis.

Les exemples et les formes de réalisation susmentionnés ne sont donc pas limitatifs. De nombreux moyens équivalents peuvent être envisagés par l'homme de l'art sans sortir du cadre de la présente invention.The examples and embodiments mentioned above are therefore not limiting. Many equivalent means can be envisaged by those skilled in the art without departing from the scope of the present invention.

Claims (2)

1. Nacelle mobile sur les montants d'une échelle caracterisée en ce qu'elle comporte des griffes de support (1,2) sur un échelon (15) capable d 'être désengagés sous l'effet d'une traction vers le haut transmise par l'intermédiaire d'une barre (3) mobile et d'un ressort (5), et un moyen de blocage capable d'engager la griffe en position de support par mouvement vers le bas d'une barre (4) mobile par rapport au chassis de la nacelle, ledit moyen de blocage comportant en outre un ressort (6) attaché d'une part à la barre (4) et d'autre part à un élément (9) solidaire de la nacelle, ressort qui sera tendu ou comprimé lorsque les griffes (1,2) seront désengagées.1. Mobile nacelle on the uprights of a ladder characterized in that it includes support claws (1,2) on a rung (15) capable of being disengaged under the effect of an upwardly transmitted traction by means of a movable bar (3) and a spring (5), and a locking means capable of engaging the claw in the support position by downward movement of a movable bar (4) by relative to the chassis of the nacelle, said blocking means further comprising a spring (6) attached on the one hand to the bar (4) and on the other hand to an element (9) integral with the nacelle, spring which will be tensioned or compressed when the claws (1,2) are disengaged. 2.Dispositif de sécurité pour nacelle mobile le long d'une échelle caractérisé en ce qu'il comprend un ressort qui dans son état actif provoqué par un opérateur libère les moyens de blocage de la nacelle et entraîne simultanément un second ressort de son état passif à son état actif, second ressort dont l'effet est de réengager les moyens de blocage soit sous la sollicitation d'un opérateur soit au cas où le premier ressort n'est plus sollicité.2.Safety device for mobile nacelle along a ladder characterized in that it comprises a spring which in its active state caused by an operator releases the locking means of the nacelle and simultaneously drives a second spring from its passive state in its active state, second spring, the effect of which is to re-engage the blocking means either under the request of an operator or in the event that the first spring is no longer requested.
EP89870034A 1988-02-24 1989-02-24 Mobile ladder basket Expired - Lifetime EP0330642B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89870034T ATE84114T1 (en) 1988-02-24 1989-02-24 LADDER CAR.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE8800214A BE1001462A7 (en) 1988-02-24 1988-02-24 Mobile platform on scale.
BE8800214 1988-02-24

Publications (2)

Publication Number Publication Date
EP0330642A1 true EP0330642A1 (en) 1989-08-30
EP0330642B1 EP0330642B1 (en) 1992-12-30

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EP89870034A Expired - Lifetime EP0330642B1 (en) 1988-02-24 1989-02-24 Mobile ladder basket

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EP (1) EP0330642B1 (en)
AT (1) ATE84114T1 (en)
BE (1) BE1001462A7 (en)
DE (1) DE68904091T2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL9301284A (en) * 1993-07-21 1994-04-05 Adriana Martha Smit Bearing structure for a working platform
EP0612899A1 (en) * 1993-02-24 1994-08-31 Construction De Materiel Pour Le Batiment Et L'industrie Comabi Scaffolding-platform and method for erecting scaffolds with such platform

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009049869A1 (en) * 2009-10-20 2011-04-28 Hymer-Leichtmetallbau Gmbh & Co. Kg Ladder scaffold for use in e.g. building site, has working platform connected with guide bars, which are displaced by displacement guide at longitudinal bars of ladder, and hooks fastened to guide bars

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB234012A (en) * 1925-01-08 1925-05-21 John Caldwell Muir Improvements in and connected with safety devices for mine cages, lifts and the like
US2438791A (en) * 1947-03-17 1948-03-30 Albert A Russell Sliding ladder jack
GB851279A (en) * 1958-01-18 1960-10-12 Theo Schaefer Improvements in or relating to mobile ladders
US3910378A (en) * 1973-09-25 1975-10-07 Curt Lennart Nyman Scaffold structure
EP0168021A1 (en) * 1984-07-13 1986-01-15 Söll Industrieschmiede GmbH Carriage for a climbing safety device in order to climb a ladder

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB234012A (en) * 1925-01-08 1925-05-21 John Caldwell Muir Improvements in and connected with safety devices for mine cages, lifts and the like
US2438791A (en) * 1947-03-17 1948-03-30 Albert A Russell Sliding ladder jack
GB851279A (en) * 1958-01-18 1960-10-12 Theo Schaefer Improvements in or relating to mobile ladders
US3910378A (en) * 1973-09-25 1975-10-07 Curt Lennart Nyman Scaffold structure
EP0168021A1 (en) * 1984-07-13 1986-01-15 Söll Industrieschmiede GmbH Carriage for a climbing safety device in order to climb a ladder

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0612899A1 (en) * 1993-02-24 1994-08-31 Construction De Materiel Pour Le Batiment Et L'industrie Comabi Scaffolding-platform and method for erecting scaffolds with such platform
NL9301284A (en) * 1993-07-21 1994-04-05 Adriana Martha Smit Bearing structure for a working platform

Also Published As

Publication number Publication date
DE68904091T2 (en) 1993-04-29
EP0330642B1 (en) 1992-12-30
DE68904091D1 (en) 1993-02-11
BE1001462A7 (en) 1989-11-07
ATE84114T1 (en) 1993-01-15

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