EP0748922A1 - Convertible extention/step ladder - Google Patents

Convertible extention/step ladder Download PDF

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Publication number
EP0748922A1
EP0748922A1 EP96401130A EP96401130A EP0748922A1 EP 0748922 A1 EP0748922 A1 EP 0748922A1 EP 96401130 A EP96401130 A EP 96401130A EP 96401130 A EP96401130 A EP 96401130A EP 0748922 A1 EP0748922 A1 EP 0748922A1
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EP
European Patent Office
Prior art keywords
ladder
rung
notches
plane
slides
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
EP96401130A
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German (de)
French (fr)
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EP0748922B1 (en
Inventor
Françis Manier
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Tubesca SA France
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Tubesca SA France
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Publication date
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Publication of EP0748922A1 publication Critical patent/EP0748922A1/en
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Publication of EP0748922B1 publication Critical patent/EP0748922B1/en
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    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C1/00—Ladders in general
    • E06C1/02—Ladders in general with rigid longitudinal member or members
    • E06C1/32—Ladders with a strut which is formed as a ladder and can be secured in line with the ladder

Definitions

  • the invention relates to a sliding ladder which can be transformed into a V-shaped opening, with two or more planes and which can be opened to develop a V-shaped support on two planes.
  • Ladders of this type are already known, provided with two upper slides on the rear plane scale and in which the ladder or scales (if several planes) of the front mobile plane are retained.
  • the slides have an internal key element which engages the opening of the ladders in a complementary hole formed on the rear face of the upright of the rear plane ladder, constituting the point of articulation of the V-shaped opening of the scales.
  • the articulation point thus formed has a significant play detrimental to the rigidity of the assembly at the opening.
  • the keys may break the uprights of the rear ladder in the event of rapid accidental opening if they are not exactly in the corresponding holes.
  • Other convertible sliding ladders are known, provided with slides on the rear plane and comprising a hinge pin on each of the uprights of the rear plane scale.
  • Each of the axes engages at the opening in a lateral notch complementary to the front ladder.
  • This construction requires the mounting of lateral attached axes and, in addition, the support is carried out on one of the walls of the ladder upright at the corresponding lateral notch, hence the fragility of the support.
  • the invention aims to remedy these drawbacks and proposes a transformable sliding scale with a V-shaped opening comprising a rear plane scale and at least one front plane scale of lesser width sliding mounted on the rear scale and between its uprights by means of two upper slides of the rear ladder, characterized in that said slides are fixed on the rear ladder at its upper rung and in that the ladder of front plane comprises at least two notches formed on the same horizontal line at its upper part, each on an upright of the front plane ladder, said notches open towards the rear ladder having a substantially C-shaped section capable of receiving said upper rung of the rear ladder and allow the articulation of the front ladder on said rung and its maintenance at full opening in V with retention of the front ladder by the inclined wings of the slide support.
  • the set has a vertical median plane of symmetry.
  • the ladder is advantageously made of a light metal alloy, but other materials, such as steel, wood and composites can be used.
  • the uprights of the front and rear plane scales are preferably parallel.
  • the slides are each fixed to an amount of the rear ladder, whether or not jointly with its upper rung.
  • the width of the front ladder is slightly less than the distance of the uprights of the rear ladder.
  • a piece of plastic insert is advantageously mounted in each of the notches, for example fixed by snap-fastening therein. This part is intended to protect the notch on the upright and to facilitate its movement of engagement on the upper rung of the rear ladder.
  • This insert piece has an upper protrusion protruding from the rear face of the corresponding upright and which, before the ladder opening movement, automatically finds the articulation point of the front ladder on the rear ladder, this protuberance abutting the upper articulation rung at rest and then positioning the notches facing this rung.
  • the sliding ladder according to the invention uses the upper rung of the rear plane scale as the axis of articulation of the front scale for its V-shaped opening and thus avoiding any additional reported axis, hence a simplified structure.
  • the notches are formed over the entire width of the uprights and not laterally on a single wall like the aforementioned known scale, hence an increased notch rigidity.
  • the transformable sliding ladder according to the invention comprises two simple ladders coupled to parallel uprights, respectively, a ladder of rear support plane 1 and a ladder of movable front plane 3 slidingly mounted on the rear ladder and between its uprights 5.
  • the sliding connection of front plane 3 is carried out in a conventional manner using a lower hook of this ladder (not shown) engaging at the desired height of slide on a rung of the rear plane and by means of two upper lateral slides 7 of the rear plane 1 in which are retained, with free sliding, the uprights 9 of the front plane scale 3.
  • the assembly has a vertical median plane of symmetry.
  • the slides 7 are each fixed against the internal wall 11 of each upright 5 of the rear ladder, in solidarity with its upper rung 13, by providing a cutout 15 of the constituent sheet corresponding to the rectangular section of the rung. They extend rectilinearly towards the front, comprising a front fold 17 forming a sliding guide towards the front of each of the uprights 9 of the front ladder, while they are applied towards the rear in sliding on the rungs of the rear ladder (identical to the upper rung), each a short distance from the corresponding uprights 5 of the rear ladder.
  • the front ladder 3 has at its upper part two notches 19 formed on each of its uprights 9, over their entire width, and arranged on the same horizontal line perpendicular to the uprights. These notches 19 are in vertical section substantially C-shaped. They are intended to engage in the upper rung 13 of the rear ladder to allow pivoting of the front plane on the rear plane until the planes of the 'V-shaped ladder, pointing upwards, similar to a stepladder. In doing so, at the maximum opening, the front plane is applied by its uprights 9 to the inclined lower fold 21 of each of the slides 7 at the angle ⁇ indicated.
  • notches 19 each receive a piece of insert 23 after molding in synthetic material (FIGS. 3 and 4) mounted snap-retained as a retainer on the upper 25 and lower 27 cutting edges of each of the uprights 9.
  • This piece of insert 23 s 'engaged in the notch by simple plugging in, its side walls or wings 29 sliding on the outside on either side of the vertical walls 31 of the upright, externally protecting the notch.
  • a lower cleat 37 from a lower cut 39 suitably folded from the slide is arranged inwardly projecting opposite each of the uprights 9 of the front plane scale.
  • the operator wishing to open the ladder pulls towards him the front ladder plane 3, previously lowered, the protrusions 33 of the notches being applied to the upper rung 13 of the plane ladder rear 1.
  • the front plane 3 automatically pivots on the upper rung 13, the notches of the insert pieces 23 sliding and rotating to accommodate the rung 13 until the complete opening, of angle ⁇ , where the position is immobilized in rearward locking by the inclined fold 21 of the slides.
  • the operator has a set of two scale plans open in V and stable without any other support such as a stepladder.
  • the closure is obtained just as easily by pushing the front plane 3 which pivots on the rung 13 and emerges from it under the support of the lower cleats 37 on each of its amounts 9.
  • the classic slide function is then obtained by closing by raising and lower hooking of the front plane 3 on the rear plane 1.
  • the notch set system 19 described from the front plane ladder, positioned at its upper part and forming an articulation socket on the upper rung 13 of the rear plane ladder can be extended over the height. of the front plane scale. It is thus possible (FIG. 5) to install several sets of notches 19 ′ regularly distributed in height on the front plane ladder 3, preferably on its upper half, this to allow the use of the open ladder in situations of uneven terrain by articulating the front plane 3 by the set of notches 19 'of appropriate height on the upper rung 13 of the rear plane 1. In this case, only the upper set of notches will have protuberances positioning the scale of front plane automatically with its notches on the articulation rung of the rear ladder. The other sets of notches allow free sliding of the front plane on the rear plane.

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  • Ladders (AREA)
  • Programmable Controllers (AREA)
  • Glass Compositions (AREA)
  • Specific Sealing Or Ventilating Devices For Doors And Windows (AREA)
  • Optical Integrated Circuits (AREA)

Abstract

The sliding ladder comprises a plane rear ladder (1) and a plane front ladder (3). The front ladder has a smaller width than the rear in which it slides between its uprights (5) in two upper runners (7) on the rear ladder. The runners are fixed on the rear ladder at the level of its upper rung (13). The front ladder has two notches (19), one in each upright (9), in its upper part formed on the same horizontal line. The notches which open towards the rear ladder have a C shaped section able to receive the rear ladder upper rung. This allows pivoting of the front ladder on the upper rung and its holding in a complete V opening with the front ladder held by the runner inclined support sides (21). A synthetic insert (23) is clipped into each notch.

Description

L'invention concerne une échelle à coulisse transformable à ouverture en V, à deux ou plusieurs plans et qui peut s'ouvrir pour se développer en appui en V sur deux plans.The invention relates to a sliding ladder which can be transformed into a V-shaped opening, with two or more planes and which can be opened to develop a V-shaped support on two planes.

On connaît déjà des échelles de ce type pourvues de deux glissières supérieures sur l'échelle de plan arrière et dans lesquelles sont retenues l'échelle ou les échelles (si plusieurs plans) de plan mobile avant. Les glissières comportent un élément de clavette intérieur qui s'engage à l'ouverture des échelles dans un trou complémentaire formé sur la face arrière du montant de l'échelle de plan arrière, constituant le point d'articulation de l'ouverture en V des échelles. Néanmoins, le point d'articulation ainsi constitué comporte un jeu non négligeable préjudiciable à la rigidité de l'assemblage à l'ouverture. En outre, les clavettes risquent de défoncer les montants de l'échelle arrière en cas de manoeuvre d'ouverture accidentelle rapide si elles ne se trouvent pas exactement dans les trous correspondants. On connaît d'autres échelles à coulisse transformables, munies de glissières sur le plan arrière et comportant un axe d'articulation sur chacun des montants de l'échelle de plan arrière. Chacun des axes s'engage à l'ouverture dans une encoche latérale complémentaire de l'échelle avant. Cette construction nécessite le montage d'axes rapportés latéraux et, en outre, l'appui est effectué sur l'une des parois du montant d'échelle au niveau de l'encoche latérale correspondante, d'où une fragilité de l'appui.Ladders of this type are already known, provided with two upper slides on the rear plane scale and in which the ladder or scales (if several planes) of the front mobile plane are retained. The slides have an internal key element which engages the opening of the ladders in a complementary hole formed on the rear face of the upright of the rear plane ladder, constituting the point of articulation of the V-shaped opening of the scales. However, the articulation point thus formed has a significant play detrimental to the rigidity of the assembly at the opening. In addition, the keys may break the uprights of the rear ladder in the event of rapid accidental opening if they are not exactly in the corresponding holes. Other convertible sliding ladders are known, provided with slides on the rear plane and comprising a hinge pin on each of the uprights of the rear plane scale. Each of the axes engages at the opening in a lateral notch complementary to the front ladder. This construction requires the mounting of lateral attached axes and, in addition, the support is carried out on one of the walls of the ladder upright at the corresponding lateral notch, hence the fragility of the support.

L'invention vise à remédier à ces inconvénients et propose une échelle à coulisse transformable à ouverture en V comportant une échelle de plan arrière et au moins une échelle de plan avant de largeur moindre montée coulissante sur l'échelle arrière et entre ses montants au moyen de deux glissières supérieures de l'échelle arrière, caractérisée en ce que lesdites glissières sont fixées sur l'échelle arrière au niveau de son échelon supérieur et en ce que l'échelle de plan avant comporte au moins deux encoches formées sur une même ligne horizontale à sa partie supérieure, chacune sur un montant de l'échelle de plan avant, lesdites encoches ouvertes vers l'échelle arrière ayant une section sensiblement à forme de C apte à recevoir ledit échelon supérieur de l'échelle arrière et permettre l'articulation de l'échelle avant sur ledit échelon et son maintien à l'ouverture complète en V avec retenue de l'échelle avant par les ailes inclinées d'appui de glissière.The invention aims to remedy these drawbacks and proposes a transformable sliding scale with a V-shaped opening comprising a rear plane scale and at least one front plane scale of lesser width sliding mounted on the rear scale and between its uprights by means of two upper slides of the rear ladder, characterized in that said slides are fixed on the rear ladder at its upper rung and in that the ladder of front plane comprises at least two notches formed on the same horizontal line at its upper part, each on an upright of the front plane ladder, said notches open towards the rear ladder having a substantially C-shaped section capable of receiving said upper rung of the rear ladder and allow the articulation of the front ladder on said rung and its maintenance at full opening in V with retention of the front ladder by the inclined wings of the slide support.

L'ensemble possède un plan de symétrie médian vertical.The set has a vertical median plane of symmetry.

L'échelle est avantageusement constituée en un alliage métallique léger, mais d'autres matériaux, tel l'acier, le bois et des composites sont utilisables.The ladder is advantageously made of a light metal alloy, but other materials, such as steel, wood and composites can be used.

Les montants des échelles de plan avant et arrière sont de préférence parallèles.The uprights of the front and rear plane scales are preferably parallel.

Les glissières sont fixées chacune à un montant de l'échelle arrière, solidairement ou non à son échelon supérieur.The slides are each fixed to an amount of the rear ladder, whether or not jointly with its upper rung.

La largeur de l'échelle avant est légèrement inférieure à la distance des montants de l'échelle arrière.The width of the front ladder is slightly less than the distance of the uprights of the rear ladder.

Une pièce d'insert en matière synthétique est avantageusement montée dans chacune des encoches, par exemple fixée en encliquetage dans celle-ci. Cette pièce est destinée à protéger l'encoche sur le montant et à faciliter son mouvement d'engagement sur l'échelon supérieur de l'échelle arrière.A piece of plastic insert is advantageously mounted in each of the notches, for example fixed by snap-fastening therein. This part is intended to protect the notch on the upright and to facilitate its movement of engagement on the upper rung of the rear ladder.

Cette pièce d'insert comporte une protubérance supérieure faisant saillie de la face arrière du montant correspondant et qui permet avant le mouvement d'ouverture de l'échelle de trouver automatiquement le point d'articulation de l'échelle avant sur l'échelle arrière, cette protubérance butant contre l'échelon supérieur d'articulation au repos et positionnant alors les encoches face à cet échelon.This insert piece has an upper protrusion protruding from the rear face of the corresponding upright and which, before the ladder opening movement, automatically finds the articulation point of the front ladder on the rear ladder, this protuberance abutting the upper articulation rung at rest and then positioning the notches facing this rung.

Il résulte de cette disposition que l'échelle à coulisse selon l'invention utilise l'échelon supérieur de l'échelle de plan arrière comme axe d'articulation de l'échelle avant pour son ouverture en V et qu'on évite ainsi tout axe supplémentaire rapporté, d'où une structure simplifiée.It follows from this arrangement that the sliding ladder according to the invention uses the upper rung of the rear plane scale as the axis of articulation of the front scale for its V-shaped opening and thus avoiding any additional reported axis, hence a simplified structure.

En outre, les encoches sont formées sur toute la largeur des montants et non pas latéralement sur une seule paroi comme l'échelle connue précitée, d'où une rigidité d'encoche accrue.In addition, the notches are formed over the entire width of the uprights and not laterally on a single wall like the aforementioned known scale, hence an increased notch rigidity.

L'invention est illustrée ci-après à l'aide d'exemples de réalisation décrits en référence aux dessins annexés, sur lesquels,

  • la Figure 1 est une vue en coupe verticale de la partie supérieure d'une échelle à coulisse transformable selon l'invention, en position fermée,
  • la Figure 2 est une vue analogue à la Figure 1 de l'échelle en position ouverte,
  • les Figures 3 et 4 sont des vues en perspective respectivement avant et arrière de la pièce d'insert destinée à être fixée dans chaque encoche de l'échelle de plan avant, et
  • la Figure 5 est une vue schématique d'une variante de réalisation à plusieurs jeux d'encoches permettant l'ouverture sur un terrain en dénivelé.
The invention is illustrated below with the aid of exemplary embodiments described with reference to the appended drawings, in which,
  • FIG. 1 is a view in vertical section of the upper part of a sliding ladder transformable according to the invention, in the closed position,
  • FIG. 2 is a view similar to FIG. 1 of the ladder in the open position,
  • Figures 3 and 4 are perspective views respectively front and rear of the insert piece intended to be fixed in each notch of the front plane scale, and
  • Figure 5 is a schematic view of an alternative embodiment with several sets of notches for opening on a slope.

Comme représenté sur les Figures 1 et 2, l'échelle à coulisse transformable selon l'invention comprend deux échelles simples accouplées à montants parallèles, respectivement, une échelle de plan arrière support 1 et une échelle de plan avant mobile 3 montée coulissante sur l'échelle arrière et entre ses montants 5. La liaison coulissante de plan avant 3 est effectuée de façon classique à l'aide d'un crochet inférieur de cette échelle (non représenté) s'engageant à hauteur voulue de coulisse sur un échelon du plan arrière et au moyen de deux glissières latérales supérieures 7 du plan arrière 1 dans lesquelles sont retenues, avec liberté de coulissement, les montants 9 de l'échelle de plan avant 3. L'ensemble possède un plan vertical médian de symétrie.As shown in FIGS. 1 and 2, the transformable sliding ladder according to the invention comprises two simple ladders coupled to parallel uprights, respectively, a ladder of rear support plane 1 and a ladder of movable front plane 3 slidingly mounted on the rear ladder and between its uprights 5. The sliding connection of front plane 3 is carried out in a conventional manner using a lower hook of this ladder (not shown) engaging at the desired height of slide on a rung of the rear plane and by means of two upper lateral slides 7 of the rear plane 1 in which are retained, with free sliding, the uprights 9 of the front plane scale 3. The assembly has a vertical median plane of symmetry.

Les glissières 7 sont fixées chacune contre la paroi interne 11 de chaque montant 5 de l'échelle arrière, solidairement à son échelon supérieur 13, en prévoyant une découpe 15 de la tôle constitutive correspondant à la section rectangulaire de l'échelon. Elles s'étendent de façon rectiligne vers l'avant, comportant un pli avant 17 formant guide de coulissement vers l'avant de chacun des montants 9 de l'échelle avant, tandis qu'ils s'appliquent vers l'arrière en glissement sur les échelons de l'échelle arrière (identiques à l'échelon supérieur), chacun à faible distance des montants correspondants 5 de l'échelle arrière.The slides 7 are each fixed against the internal wall 11 of each upright 5 of the rear ladder, in solidarity with its upper rung 13, by providing a cutout 15 of the constituent sheet corresponding to the rectangular section of the rung. They extend rectilinearly towards the front, comprising a front fold 17 forming a sliding guide towards the front of each of the uprights 9 of the front ladder, while they are applied towards the rear in sliding on the rungs of the rear ladder (identical to the upper rung), each a short distance from the corresponding uprights 5 of the rear ladder.

L'échelle avant 3 comporte à sa partie supérieure deux encoches 19 formées sur chacun de ses montants 9, sur toute leur largeur, et disposées sur une même ligne horizontale perpendiculaire aux montants. Ces encoches 19 sont en section verticale sensiblement en forme de C. Elles sont destinées à s'engager dans l'échelon supérieur 13 de l'échelle arrière pour permettre le pivotement du plan avant sur le plan arrière jusqu'à ouvrir les plans de l'échelle à forme de V, pointe en haut, de manière analogue à un escabeau. Ce faisant, à l'ouverture maximale le plan avant s'applique par ses montants 9 sur le pli inférieur incliné 21 de chacune des glissières 7 selon l'angle α indiqué.The front ladder 3 has at its upper part two notches 19 formed on each of its uprights 9, over their entire width, and arranged on the same horizontal line perpendicular to the uprights. These notches 19 are in vertical section substantially C-shaped. They are intended to engage in the upper rung 13 of the rear ladder to allow pivoting of the front plane on the rear plane until the planes of the 'V-shaped ladder, pointing upwards, similar to a stepladder. In doing so, at the maximum opening, the front plane is applied by its uprights 9 to the inclined lower fold 21 of each of the slides 7 at the angle α indicated.

Ces encoches 19 reçoivent chacune une pièce d'insert 23 issue de moulage en matière synthétique (figures 3 et 4) montée encliquetée en retenue sur les bords de découpe supérieur 25 et inférieur 27 de chacun des montants 9. Cette pièce d'insert 23 s'engage dans l'encoche par simple enfichage, ses parois ou ailes latérales 29 glissant extérieurement de part et d'autre des parois verticales 31 du montant, protégeant extérieurement l'encoche. De section complémentaire de la demi-section de l'échelon supérieur 13 de l'échelle arrière, tourné de l'angle α d'ouverture des plans, d'environ 40°, et pourvue d'une protubérance supérieure 33 émergeant de la paroi arrière 35 du montant 9, elle maintient parfaitement l'échelon à l'ouverture des plans d'échelle sans risque de glissement de celui-ci dans son logement, l'articulation étant en quelque sorte bloquée en coincement sur le pli incliné 21 de glissière, sans jeu. La protubérance 33 empêche en outre tout échappement extérieur de l'échelon 13 dans son encoche. De plus, comme représenté à la figure 1, elle forme butée de coulissement du plan avant, lequel vient automatiquement en position pour l'ouverture en V et pivote sur l'échelon d'articulation 13, les pièces d'insert 23 glissant par leur large surface interne sur celui-ci en tournant jusqu'à l'orientation d'angle α précité.These notches 19 each receive a piece of insert 23 after molding in synthetic material (FIGS. 3 and 4) mounted snap-retained as a retainer on the upper 25 and lower 27 cutting edges of each of the uprights 9. This piece of insert 23 s 'engaged in the notch by simple plugging in, its side walls or wings 29 sliding on the outside on either side of the vertical walls 31 of the upright, externally protecting the notch. Of complementary section to the half-section of the upper rung 13 of the rear ladder, turned from the angle α of opening of the planes, of about 40 °, and provided with an upper protrusion 33 emerging from the wall rear 35 of the upright 9, it perfectly maintains the rung at the opening of the ladder planes without the risk of it sliding in its housing, the articulation being somehow blocked jamming on the inclined fold 21 of the slide, without play. The protrusion 33 also prevents any external escape from the rung 13 in its notch. In addition, as shown in FIG. 1, it forms a sliding stop for the front plane, which automatically comes into position for the V-shaped opening and pivots on the articulation rung 13, the insert pieces 23 sliding by their large internal surface thereon by turning to the above-mentioned angle orientation α.

Un taquet inférieur 37 issu d'une découpe inférieure 39 convenablement pliée de la glissière est disposé en saillie vers l'intérieur en regard de chacun des montants 9 de l'échelle de plan avant. Ces deux taquets permettent le dégagement inverse, de l'ouverture à la position fermée de coulisse, de l'échelle de plan avant dont les encoches 19 sortent de l'échelon 13 sous l'application en levier des taquets 37 sur les montants correspondants 9. Le mouvement est effectué avec symétrie par rapport au plan médian vertical.A lower cleat 37 from a lower cut 39 suitably folded from the slide is arranged inwardly projecting opposite each of the uprights 9 of the front plane scale. These two tabs allow the reverse release, from the opening to the closed sliding position, of the front plane scale, the notches 19 of which come out of the rung 13 under the lever application of the tabs 37 on the corresponding uprights 9 The movement is carried out with symmetry with respect to the vertical median plane.

Le fonctionnement de cette échelle à coulisse transformable selon l'invention est très simple.The operation of this transformable sliding ladder according to the invention is very simple.

Partant d'une position fermée de coulisse, l'opérateur désirant ouvrir l'échelle tire vers lui le plan d'échelle avant 3, préalablement descendu, les protubérances 33 des encoches étant appliquées sur l'échelon supérieur 13 de l'échelle de plan arrière 1. Le plan avant 3 pivote automatiquement sur l'échelon supérieur 13, les encoches des pièces d'insert 23 glissant et tournant pour accueillir l'échelon 13 jusqu'à l'ouverture complète, d'angle α, où la position est immobilisée en blocage vers l'arrière par le pli incliné 21 des glissières. A ce moment, l'opérateur dispose d'un ensemble de deux plans d'échelle ouverts en V et stables sans autre support comme un escabeau.Starting from a closed sliding position, the operator wishing to open the ladder pulls towards him the front ladder plane 3, previously lowered, the protrusions 33 of the notches being applied to the upper rung 13 of the plane ladder rear 1. The front plane 3 automatically pivots on the upper rung 13, the notches of the insert pieces 23 sliding and rotating to accommodate the rung 13 until the complete opening, of angle α, where the position is immobilized in rearward locking by the inclined fold 21 of the slides. At this time, the operator has a set of two scale plans open in V and stable without any other support such as a stepladder.

La fermeture s'obtient tout aussi aisément en poussant le plan avant 3 qui pivote sur l'échelon 13 et se dégage de celui-ci sous l'appui des taquets inférieurs 37 sur chacun de ses montants 9.The closure is obtained just as easily by pushing the front plane 3 which pivots on the rung 13 and emerges from it under the support of the lower cleats 37 on each of its amounts 9.

La fonction classique de coulisse s'obtient alors à la fermeture par élévation et crochetage inférieur du plan avant 3 sur le plan arrière 1.The classic slide function is then obtained by closing by raising and lower hooking of the front plane 3 on the rear plane 1.

Naturellement, le système de jeu d'encoches 19 décrit de l'échelle de plan avant, positionné à sa partie supérieure et formant prise d'articulation sur l'échelon supérieur 13 de l'échelle de plan arrière, peut être étendu sur la hauteur de l'échelle de plan avant. On peut ainsi (figure 5) implanter plusieurs jeux d'encoches 19' régulièrement répartis en hauteur sur l'échelle de plan avant 3, de préférence sur sa moitié supérieure, ceci pour permettre l'utilisation de l'échelle ouverte dans des situations de dénivelé du terrain en articulant le plan avant 3 par le jeu d'encoches 19' de hauteur appropriée sur l'échelon supérieur 13 du plan arrière 1. Dans ce cas, seul le jeu d'encoches supérieur disposera de protubérances positionnant l'échelle de plan avant automatiquement avec ses encoches sur l'échelon d'articulation de l'échelle arrière. Les autres jeux d'encoches autorisent le libre coulissement du plan avant sur le plan arrière.Naturally, the notch set system 19 described from the front plane ladder, positioned at its upper part and forming an articulation socket on the upper rung 13 of the rear plane ladder, can be extended over the height. of the front plane scale. It is thus possible (FIG. 5) to install several sets of notches 19 ′ regularly distributed in height on the front plane ladder 3, preferably on its upper half, this to allow the use of the open ladder in situations of uneven terrain by articulating the front plane 3 by the set of notches 19 'of appropriate height on the upper rung 13 of the rear plane 1. In this case, only the upper set of notches will have protuberances positioning the scale of front plane automatically with its notches on the articulation rung of the rear ladder. The other sets of notches allow free sliding of the front plane on the rear plane.

Claims (8)

échelle à coulisse transformable à ouverture en V comportant une échelle de plan arrière (1) et au moins une échelle de plan avant (3) de largeur moindre montée coulissante sur l'échelle arrière (1) et entre ses montants (5) au moyen de deux glissières supérieures (7) de l'échelle arrière (1), caractérisée en ce que lesdites glissières (7) sont fixées sur l'échelle arrière (1) au niveau de son échelon supérieur (13) et en ce que l'échelle de plan avant (3) comporte au moins deux encoches (19) formées sur une même ligne horizontale à sa partie supérieure, chacune sur un montant (9) de l'échelle de plan avant, lesdites encoches (19) ouvertes vers l'échelle arrière (1) ayant une section sensiblement à forme de C apte à recevoir ledit échelon supérieur (13) de l'échelle arrière (1) et permettre l'articulation de l'échelle avant (3) sur ledit échelon (13) et son maintien à l'ouverture complète en V avec retenue de l'échelle avant (3) par les ailes inclinées d'appui (21) de glissière, une pièce d'insert (23) en matière synthétique étant montée dans chacune des encoches (19), par exemple fixée en encliquetage dans celle-ci.convertible sliding ladder with V opening comprising a rear plane scale (1) and at least one front plane scale (3) of lesser width sliding mounted on the rear scale (1) and between its uprights (5) by means two upper slides (7) of the rear ladder (1), characterized in that said slides (7) are fixed on the rear ladder (1) at its upper rung (13) and in that the front plane ladder (3) comprises at least two notches (19) formed on the same horizontal line at its upper part, each on an upright (9) of the front plane ladder, said notches (19) open towards the rear ladder (1) having a substantially C-shaped section capable of receiving said upper rung (13) of the rear ladder (1) and allowing the articulation of the front ladder (3) on said rung (13) and keeping it fully open in V with retention of the front ladder (3) by the wings inc supporting lineages (21) of a slide, a piece of insert (23) made of synthetic material being mounted in each of the notches (19), for example fixed by snap-fastening therein. Echelle selon la revendication 1, caractérisée en ce qu'elle possède un plan de symétrie vertical médian.Ladder according to claim 1, characterized in that it has a median vertical plane of symmetry. Echelle selon l'une des revendications précédentes, caractérisée en ce que les glissières (7) sont fixées chacune à un montant (5) de l'échelle arrière (1), solidairement ou non à son échelon supérieur (13).Ladder according to one of the preceding claims, characterized in that the slides (7) are each fixed to an upright (5) of the rear ladder (1), whether or not integral with its upper rung (13). Echelle selon l'une des revendications précédentes, caractérisée en ce que la pièce d'insert (23) comporte une protubérance supérieure (33) faisant saillie de la paroi arrière (35) du montant (9) et qui permet avant le mouvement d'ouverture de l'échelle de trouver automatiquement le point d'articulation de l'échelle avant (3) sur l'échelle arrière (1), cette protubérance (33) butant contre l'échelon d'articulation (13) au repos et positionnant alors les encoches (19, 23) face à cet échelon (13).Ladder according to one of the preceding claims, characterized in that the insert (23) has an upper protrusion (33) projecting from the rear wall (35) of the upright (9) and which allows the movement before opening the ladder to automatically find the articulation point of the front ladder (3) on the rear ladder (1), this protuberance (33) abutting the articulation rung (13) at rest and positioning then the notches (19, 23) facing this rung (13). Echelle selon l'une des revendications précédentes, caractérisée en ce que les glissières (7) sont fixées chacune contre la paroi interne (11) de chaque montant (5) de l'échelle arrière (1), solidairement à son échelon supérieur (13) en prévoyant une découpe (15) de sa tôle constitutive correspondant à la section de l'échelon (13), rectangulaire.Ladder according to one of the preceding claims, characterized in that the slides (7) are each fixed against the internal wall (11) of each upright (5) of the rear ladder (1), integrally at its upper rung (13) by providing a cutout (15) of its constituent sheet corresponding to the section of the rung (13), rectangular. Echelle selon l'une des revendications précédentes, caractérisée en ce que la pièce d'insert (23) a une section sensiblement complémentaire de la demi-section de l'échelon d'articulation (13) tourné à l'angle d'ouverture (α) de l'échelle.Ladder according to one of the preceding claims, characterized in that the insert piece (23) has a section substantially complementary to the half-section of the articulation rung (13) turned at the opening angle ( α) of the scale. Echelle selon l'une des revendications précédentes, caractérisée en ce que les glissières (7) comportent chacune un taquet inférieur (37), disposé en regard de chacun des montants (9) de l'échelle de plan avant, formant levier de dégagement des encoches (19, 23) de l'échelon d'articulation (13) à la fermeture de l'échelle.Ladder according to one of the preceding claims, characterized in that the slides (7) each comprise a lower cleat (37), disposed opposite each of the uprights (9) of the front plane ladder, forming a lever for releasing the notches (19, 23) of the articulation rung (13) when the ladder is closed. Echelle selon l'une des revendications précédentes, caractérisée en ce qu'elle comporte plusieurs jeux d'encoches (19') régulièrement disposés en hauteur sur l'échelle de plan avant (3).Ladder according to one of the preceding claims, characterized in that it comprises several sets of notches (19 ') regularly arranged in height on the front plane scale (3).
EP96401130A 1995-06-14 1996-05-24 Convertible extention/step ladder Expired - Lifetime EP0748922B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9507067 1995-06-14
FR9507067A FR2735521B1 (en) 1995-06-14 1995-06-14 TRANSFORMABLE SLIDING LADDER WITH V-OPENING

Publications (2)

Publication Number Publication Date
EP0748922A1 true EP0748922A1 (en) 1996-12-18
EP0748922B1 EP0748922B1 (en) 1999-09-22

Family

ID=9479972

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96401130A Expired - Lifetime EP0748922B1 (en) 1995-06-14 1996-05-24 Convertible extention/step ladder

Country Status (4)

Country Link
EP (1) EP0748922B1 (en)
AT (1) ATE184958T1 (en)
DE (1) DE69604337T2 (en)
FR (1) FR2735521B1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1025225C2 (en) * 2004-01-13 2005-07-14 C T R Trading B V Device for collecting and lowering a window covering.
NL2028175B1 (en) * 2021-05-07 2022-11-24 Altrex Bv Multi-piece ladder bracket

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR416967A (en) * 1910-05-11 1910-11-03 A Peron Et Cie Soc Double ladder convertible into extension ladder
FR500119A (en) * 1919-05-28 1920-03-03 Alessandro Zerlini Improvements to extendable and portable ladders
US2589079A (en) * 1948-09-17 1952-03-11 Wallace L Speicher Combination ladder
US2873903A (en) * 1958-06-30 1959-02-17 Chesebro Whitman Mfg Corp Convertible ladders
FR1372452A (en) * 1963-04-17 1964-09-18 Ladder fittings
FR2150013A5 (en) * 1971-08-12 1973-03-30 Hymer Leichtmetallbau

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR416967A (en) * 1910-05-11 1910-11-03 A Peron Et Cie Soc Double ladder convertible into extension ladder
FR500119A (en) * 1919-05-28 1920-03-03 Alessandro Zerlini Improvements to extendable and portable ladders
US2589079A (en) * 1948-09-17 1952-03-11 Wallace L Speicher Combination ladder
US2873903A (en) * 1958-06-30 1959-02-17 Chesebro Whitman Mfg Corp Convertible ladders
FR1372452A (en) * 1963-04-17 1964-09-18 Ladder fittings
FR2150013A5 (en) * 1971-08-12 1973-03-30 Hymer Leichtmetallbau

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1025225C2 (en) * 2004-01-13 2005-07-14 C T R Trading B V Device for collecting and lowering a window covering.
EP1555384A1 (en) * 2004-01-13 2005-07-20 CTR Trading B.V. Device for raising and lowering a window covering
NL2028175B1 (en) * 2021-05-07 2022-11-24 Altrex Bv Multi-piece ladder bracket

Also Published As

Publication number Publication date
FR2735521A1 (en) 1996-12-20
ATE184958T1 (en) 1999-10-15
FR2735521B1 (en) 1997-09-05
EP0748922B1 (en) 1999-09-22
DE69604337T2 (en) 1999-12-30
DE69604337D1 (en) 1999-10-28

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