EP1832709B1 - Têtes d'articulations pour échelles transformables - Google Patents

Têtes d'articulations pour échelles transformables Download PDF

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Publication number
EP1832709B1
EP1832709B1 EP07003861.7A EP07003861A EP1832709B1 EP 1832709 B1 EP1832709 B1 EP 1832709B1 EP 07003861 A EP07003861 A EP 07003861A EP 1832709 B1 EP1832709 B1 EP 1832709B1
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EP
European Patent Office
Prior art keywords
transformable
heads
ladder
scale
uprights
Prior art date
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Application number
EP07003861.7A
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German (de)
English (en)
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EP1832709A1 (fr
Inventor
Jean-Paul Merigot
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Macc SA
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Macc SA
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Classifications

    • 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
    • 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
    • E06C1/14—Ladders capable of standing by themselves
    • E06C1/16—Ladders capable of standing by themselves with hinged struts which rest on the ground
    • E06C1/18—Ladders capable of standing by themselves with hinged struts which rest on the ground with supporting struts formed as ladders

Definitions

  • Patent 2,391,349 - MULLCA - describes a piece of articulation for transformable ladder head hinge and allowing the sliding of two planes between them and the double scaling at various levels to compensate for unevenness.
  • the heads of joints have shapes that do not allow the spacing planes if they are not in front of rungs or a stud.
  • the pads are located on the inner face of a plane and are in the middle of the interval between rungs.
  • the pads have the same rating as a rung and can thus be housed in the form provided on the plan to receive the rung. This feature therefore allows an offset setting every half scale intervals, a more accurate offset is thus obtained.
  • the hinge heads attached to the ends of the right and left uprights of a plane therefore a right hinge head and a left hinge head, allow two movements to the other plane namely, the sliding and the hinge. opening for double scaling.
  • the planes (1) (2) of the transformable scale (12) are guided in the upper part of the plane (2) by two heads of joints (3) (3 ').
  • the articulating heads (3) (3 ') slidably guide the plane (1) on the plane (2) by means of shapes (9) (9') and lips (13) (13 ') (14). ) (14 ') present on these same heads of joints (3) (3').
  • the planes (1) (2) articulate with each other to convert the transformable scale (12) of a double ladder slide on the joint heads (3) (3 ') when one of the steps (4) or studs (5) (5 ') integral with the uprights (17) (18) of the plane (1) of the transformable ladder (12) coincide with the outer forms (15) (15') (16) (16 ') arranged on said joint heads (3) (3 ').
  • the studs (5) (5 ') integral with the inner face of the uprights (17) (18) of the plane (1) are located in the middle of the interval of all the steps (4).
  • this arrangement makes it possible to make shifts of half a step step transformable (12) and 'get the settings more suitable for unevenness.
  • the studs (5) (5 ') are located over the entire height of the respective uprights (17) (18).
  • the hook (6) equipped with its rocking latch (19) and its symmetrical (6 ') not equipped with a rocker latch serve as a limit of movement to the deployment behind the plane (1) on the plane (2) because they respectively abut against the heads of joints (3) (3 ') on the outer forms (16) (16').

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  • Ladders (AREA)

Description

  • Brevet 2 391 349 - MULLCA - décrit une pièce d'articulation pour échelle transformable faisant tête d'articulation et autorisant le coulissement de deux plans entre eux et la mise en échelle double à divers échelons pour compenser les dénivelés.
  • Brevet 2 428 734 - GENRIES Pierre - décrit une articulation d'échelle transformable pouvant recevoir n'importe quel échelon.
  • Brevet 2 521 208 - Ets GUBRI - Jean BIANCHI - décrit un accessoire pour échelle transformable qui est amovible et peut se mettre au niveau de l'échelon désiré pour faire articulation d'échelle double et ainsi provoquer un décalage entre les plans pour accepter les dénivelés.
  • De nombreuses articulations ou têtes d'articulations existent pour les échelles dites transformables qui permettent d'assurer le déploiement soit en coulisse soit en double et, dans ce dernier cas, à l'échelon désiré correspondant au dénivelé de la surface d'appui ou au pas défini par l'entraxe des échelons.
  • La présente invention a pour but de remédier à ce défaut, en proposant des demi-pas de réglage et ainsi garantir la sécurité de l'utilisateur lors de la mise en échelle double et ainsi bien positionner celle-ci proche de la verticale.
  • Pour obtenir ce résultat, les têtes d'articulations comportent des formes qui n'autorisent pas la mise en écartement des plans si celles-ci ne sont pas en face d'échelons ou d'un plot. Les plots sont situés sur la face intérieure d'un plan et sont au milieu de l'intervalle entre échelons. Les plots ont la même cote qu'un échelon et peuvent donc se loger dans la forme prévue sur le plan pour recevoir l'échelon. Cette particularité permet donc un réglage décalé tous les demi intervalles d'échelons, un décalé plus précis est ainsi obtenu.
  • Les têtes d'articulations fixées à l'extrémité des montants droit et gauche d'un plan, donc une tête d'articulation droite et une tête d'articulation gauche, permettent deux mouvements à l'autre plan à savoir, le coulissement et l'ouverture pour mise en échelle double.
  • Dans le cas d'utilisation en échelle à coulisse, la mise en longueur de l'échelle est obtenue par déplacement d'un plan sur l'autre. Le maintien en position est fait par des crochets qui s'engagent dans un échelon, un verrou rabattu évite le désengagement. Ces crochets servent aussi de limiteurs de course en coulisse en venant buter sur les têtes d'articulations. Cette limitation de course étant la garante d'un minimum d'engagement d'un plan sur l'autre nécessaire à la résistance physique du produit, donc de la sécurité de l'utilisateur.
    • La figure 1 représente en perspective une échelle transformable repliée.
    • La figure 2 représente en perspective une échelle transformable ouverte au niveau du deuxième plot.
    • La figure 3 représente en perspective, vue de gauche, une échelle transformable en position double ouverte au niveau du deuxième plot.
    • La figure 4 représente en perspective, vue de droite, une échelle transformable en position double ouverte au niveau du deuxième échelon.
    • La figure 5 représente une échelle transformable et son système de butée limitant le déploiement en position coulisse.
    • La figure 6 représente, en perspective, une échelle transformable déployée en coulisse.
    • La figure 7 représente une échelle dont le déploiement en double n'est pas possible.
    • La figure 8 représente les têtes d'articulations gauche et droite sans les plans d'échelle.
    • La figure 9 représente, vue de côté, une échelle transformable déployée en double avec un dénivelé dans les appuis des pieds de l'échelle.
  • Selon les figures 1, 2, les plans (1) (2) de l'échelle transformable (12) sont guidés en partie haute du plan (2) par deux têtes d'articulations (3) (3').
  • Selon les figures 6, 8, les têtes d'articulations (3) (3') guident en coulissement le plan (1) sur le plan (2) au moyen de formes (9) (9') et de lèvres (13) (13') (14) (14') présentes sur ces mêmes têtes d'articulations (3) (3').
  • Selon les figures 2, 3, 4, 8, les plans (1) (2) s'articulent entre eux pour convertir l'échelle transformable (12) de coulisse en échelle double sur les têtes d'articulations (3) (3') quand un des échelons (4) ou des plots (5) (5') solidaires des montants (17) (18) du plan (1) de l'échelle transformable (12) coïncident avec les formes extérieures (15) (15') (16) (16') ménagées sur lesdites têtes d'articulations (3) (3').
  • Toujours selon les figures 2, 3, 4, 8, lorsque les échelons (4) s'engagent entre les lèvres (13) (13') (14) (14'), les plots (5) (5') s'engagent entre les formes extérieures (15) (15') (16) (16'). Inversement, lorsque les plots (5) (5') s'engagent entre les lèvres (13) (13') (14) (14'), les échelons (4) s'engagent entre les formes extérieures (15) (15') (16) (16').
  • Selon les figures 3, 4, 8; 9, les plots (5) (5') solidaires de la face intérieure des montants (17) (18) du plan (1) sont situés au milieu de l'intervalle de l'ensemble des échelons (4). Lorsque l'un des échelons (4) se trouve entre les lèvres (13) (13') (14) (14'), cette disposition permet de faire des décalés d'un demi pas d'échelle transformable (12) et d'obtenir les réglages plus adaptés aux dénivelés. Les plots (5) (5') sont situés sur toute la hauteur des montants respectifs (17) (18).
  • Selon les figures 3, 7, 8, lorsque les échelons (4) ou les plots (5) (5') ne sont pas en concordance avec les lèvres (13) (13') (14) (14') et les formes extérieures (15) (15') (16) (16') respectivement présentes sur les têtes d'articulations (3) (3'), l'ouverture des deux plans (1) (2) n'est pas possible, ce qui assure une sécurité à l'utilisateur car tout autre enclenchement est impossible.
  • Selon les figures 5, 6, 9, le crochet (6) équipé de son verrou basculeur (19) et son symétrique (6') non équipé d'un verrou basculeur, servent de limiteur de course au déploiement en coulisse du plan (1) sur le plan (2) car ils viennent buter respectivement contre les têtes d'articulations (3) (3') sur les formes extérieures (16) (16').
  • Selon les figures 3, 8, les retours (10) (10') (11) (11') viennent en appui sur les montants (20) (21) du plan (2), de façon à rigidifier l'échelle transformable en position échelle double.

Claims (1)

  1. Echelle transformable composée de deux plans (1) (2) constitués chacun de deux montants (17) (18) (20) (21) réunis par des échelons (4) et articulés entre eux, ladite échelle comportant des têtes d'articulations, caractérisées en ce que des plots (5) (5') sont situés entre les échelons (4), à mi-distance, sur la face intérieure des montants (17) (18) du plan (1) et sur toute la hauteur des montants du plan (1), et que des têtes d'articulations (3) (3') sont composées des formes extérieures (15) (15') (16) (16') portées respectivement par des joues (7) (7') (8) (8') dont la disposition fait que l'un des échelons (4) ou l'un des plots (5) (5') vient s'engager intuitivement entre des lèvres (13) (13') (14) (14') des dites têtes d'articulations (3) (3') pour la mise en écartement des plans (1) (2), permettent un positionnement en demi pas, à n'importe quelle hauteur du dit plan (1).
EP07003861.7A 2006-03-10 2007-02-26 Têtes d'articulations pour échelles transformables Active EP1832709B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0602244A FR2898381B1 (fr) 2006-03-10 2006-03-10 Tetes d'articulations pour echelles transformables

Publications (2)

Publication Number Publication Date
EP1832709A1 EP1832709A1 (fr) 2007-09-12
EP1832709B1 true EP1832709B1 (fr) 2013-11-27

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ID=37455860

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07003861.7A Active EP1832709B1 (fr) 2006-03-10 2007-02-26 Têtes d'articulations pour échelles transformables

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EP (1) EP1832709B1 (fr)
ES (1) ES2440819T3 (fr)
FR (1) FR2898381B1 (fr)
PT (1) PT1832709E (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2476283A (en) * 2009-12-18 2011-06-22 Keith Phillips Attachment device to secure a ladder to a scaffold
FR3006362B1 (fr) * 2013-06-04 2017-08-25 Tubesca-Comabi Systeme d'echelle transformable
CN105221056B (zh) * 2014-06-03 2017-03-15 张仕杰 可强化支撑功能的工作梯
US12352106B2 (en) * 2020-11-18 2025-07-08 William Fink, JR. Safety step ladder with supported reach

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1837187A (en) * 1929-06-24 1931-12-22 Percy H Allen Convertible ladder
US3100552A (en) * 1961-02-21 1963-08-13 Hopfeld Henry Convertible ladder
FR2391349A1 (fr) * 1977-05-16 1978-12-15 Mullca Piece d'articulation pour echelle transformable
FR2428734A1 (fr) * 1978-06-12 1980-01-11 Genries Pierre Articulation d'echelle
FR2521208A1 (fr) * 1982-02-11 1983-08-12 Gubri Sa Ets L Dispositif accessoire pour echelles transformables
DE8811069U1 (de) * 1988-09-01 1988-11-10 Krause-Werk Gmbh & Co Kg, 6320 Alsfeld Verbindungselement

Also Published As

Publication number Publication date
FR2898381A1 (fr) 2007-09-14
FR2898381B1 (fr) 2009-10-02
EP1832709A1 (fr) 2007-09-12
PT1832709E (pt) 2014-01-10
ES2440819T3 (es) 2014-01-30

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