FR2886974A1 - Ladder for use in e.g. civil aircraft, has posts spaced from each other, half bars disposed in extension from each other and articulations blocked toward bottom by mutual support of contact plates, in deployed position of posts and bars - Google Patents

Ladder for use in e.g. civil aircraft, has posts spaced from each other, half bars disposed in extension from each other and articulations blocked toward bottom by mutual support of contact plates, in deployed position of posts and bars Download PDF

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Publication number
FR2886974A1
FR2886974A1 FR0505794A FR0505794A FR2886974A1 FR 2886974 A1 FR2886974 A1 FR 2886974A1 FR 0505794 A FR0505794 A FR 0505794A FR 0505794 A FR0505794 A FR 0505794A FR 2886974 A1 FR2886974 A1 FR 2886974A1
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France
Prior art keywords
bars
uprights
posts
scale according
bar
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Granted
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FR0505794A
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French (fr)
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FR2886974B1 (en
Inventor
Bernard Guering
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Airbus Operations SAS
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Airbus Operations SAS
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Priority to FR0505794A priority Critical patent/FR2886974B1/en
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Publication of FR2886974B1 publication Critical patent/FR2886974B1/en
Expired - Fee Related legal-status Critical Current
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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
    • E06C1/38—Special constructions of ladders, e.g. ladders with more or less than two longitudinal members, ladders with movable rungs or other treads, longitudinally-foldable ladders
    • E06C1/383—Foldable ladders in which the longitudinal members are brought together on folding
    • E06C1/3835—Foldable ladders in which the longitudinal members are brought together on folding having collapsible steps comprising a hinge in their central part

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  • Ladders (AREA)

Abstract

The ladder has posts and bars (7) displaced between folded and deployed positions. The posts are brought closer to each other and half-bars (7.1, 7.2) of each bar are folded on each other with their median articulations directed towards the top, and are housed in channels (5) with respect to the posts, in the folded position. The posts are spaced from each other, the half bars are disposed in an extension from each other and the median articulations are blocked toward the bottom by mutual support of contact plates (10, 11) of bars` faces with respect to the half bars, in the deployed position.

Description

La présente invention concerne une échelle pliable, apte à ne présenterThe present invention relates to a foldable ladder, able to present

qu'un faible encombrement lorsqu'elle n'est pas utilisée.  that a small footprint when not in use.

Quoique non exclusivement, l'échelle de la présente invention est particulièrement appropriée à être utilisée à bord de véhicules, notamment les aéronefs civils, dans lesquels l'espace libre est limité et doit donc être aménagé au mieux.  Although not exclusively, the scale of the present invention is particularly suitable for use in vehicles, especially civil aircraft, in which the free space is limited and must therefore be arranged at best.

A cette fin, selon l'invention, l'échelle comportant deux montants parallèles entre lesquels sont disposés des barreaux transversaux, est remarquable en ce que: chacun desdits montants présente un canal longitudinal et lesdits montants sont disposés de façon que leurs canaux soient disposés en regard l'un de l'autre; les extrémités de chaque barreau pénètrent respectivement dans lesdits canaux en regard et sont articulées dans ceux-ci autour d'axes ortho- gonaux auxdits montants; chaque barreau est composé de deux demi-barreaux dont les faces en regard sont reliées l'une à l'autre par une articulation médiane d'axe parallèle auxdits axes d'articulation des extrémités desdits barreaux; et lesdits montants et lesdits barreaux peuvent prendre en commun deux positions extrêmes, à savoir: une position repliée pour laquelle lesdits montants sont rapprochés l'un de l'autre et les deux demi-barreaux de chaque barreau, d'une part, sont repliés l'un sur l'autre avec leur articulation médiane dirigée vers le haut et, d'autre part, sont respectivement logés dans lesdits canaux en regard desdits montants rapprochés; et É une position déployée pour laquelle lesdits montants sont écartés l'un de l'autre et les deux demi-barreaux de chaque barreau sont disposés en prolongement l'un de l'autre, les articulations médianes desdits barreaux étant bloquées vers le bas par appui mutuel desdi- tes faces en regard desdits demi-barreaux.  To this end, according to the invention, the ladder comprising two parallel uprights between which transverse bars are arranged, is remarkable in that: each of said uprights has a longitudinal channel and said uprights are arranged so that their channels are arranged in look at each other; the ends of each bar penetrate respectively into said opposite channels and are articulated in these around axes orthogonal to said uprights; each bar is composed of two half-bars whose facing faces are connected to one another by a median articulation axis parallel to said axes of articulation of the ends of said bars; and said uprights and said bars can take together two extreme positions, namely: a folded position for which said uprights are brought closer to each other and the two half-bars of each bar, on the one hand, are folded one on the other with their median articulation directed upwards and, on the other hand, are respectively housed in said channels opposite said close amounts; and E an extended position for which said amounts are spaced from each other and the two half-bars of each bar are arranged in extension of one another, the median joints of said bars being blocked down by mutual support of said faces opposite said half-bars.

Ainsi, dans ladite position repliée, l'encombrement transversal de l'échelle conforme à la présente invention est particulièrement réduit.  Thus, in said folded position, the transverse size of the ladder according to the present invention is particularly reduced.

Avantageusement, notamment pour permettre la réalisation des-dits barreaux en un profilé creux (par exemple en aluminium à section en U rectangle), chacune desdites faces en regard desdits demi-barreaux porte une semelle de contact. De préférence, lesdites semelles de contact font partie desdites articulations médianes.  Advantageously, particularly to allow the realization of said bars in a hollow profile (for example aluminum U-section rectangle), each of said faces facing said half-bars carries a contact plate. Preferably, said contact soles are part of said median joints.

Il est également avantageux que lesdits montants soient réalisés en profilés à section au moins approximativement en U, de préférence rectangle.  It is also advantageous if said uprights are made of at least approximately U-section profiles, preferably rectangle.

Pour réduire l'encombrement longitudinal de l'échelle selon l'invention en position repliée, il est avantageux que lesdits montants soient chacun composés d'au moins deux parties reliées l'une à l'autre par une articulation d'axe orthogonal auxdits axes d'articulation des barreaux, les axes des articulations desdits montants étant deux à deux alignés.  To reduce the longitudinal size of the scale according to the invention in the folded position, it is advantageous that said uprights are each composed of at least two parts connected to each other by a hinge axis orthogonal to said axes. articulation of the bars, the axes of the joints of said amounts being two to two aligned.

Dans un mode de réalisation avantageux, lesdits montants sont chacun composés de deux demi-montants reliés l'un à l'autre par une articulation d'axe orthogonal auxdits axes d'articulation des barreaux, les axes des deux articulations desdits montants étant alignés.  In an advantageous embodiment, said uprights are each composed of two half-uprights connected to each other by a hinge axis orthogonal to said hinge axes of the bars, the axes of the two joints of said uprights being aligned.

Les figures du dessin annexé feront bien comprendre comment l'invention peut être réalisée. Sur ces figures, des références identiques désignent des éléments semblables.  The figures of the appended drawing will make it clear how the invention can be realized. In these figures, identical references designate similar elements.

Les figures 1 A, 1 B, 1 C, 1 D et 1E sont des vues en perspective d'un exemple de réalisation de l'échelle conforme à la présente invention, les figures 1A et 1E représentant ladite échelle respectivement en position déployée et en position repliée, les figures 1 B, 1C et 1 D montrant des positions intermédiaires entre lesdites positions déployée et repliée.  FIGS. 1A, 1B, 1C, 1D and 1E are perspective views of an exemplary embodiment of the scale according to the present invention, FIGS. 1A and 1E representing said scale respectively in the deployed position and in FIG. folded position, Figures 1B, 1C and 1D showing intermediate positions between said deployed and folded positions.

La figure 2 est une vue en coupe selon la ligne II-II de la figure 1, montrant un barreau du dessous en position déployée.  Figure 2 is a sectional view along the line II-II of Figure 1, showing a bar from below in the deployed position.

La figure 3 illustre, à plus grande échelle, l'articulation d'un barreau d'échelle en position partiellement repliée, comme sur la figure I B. L'échelle 1, montrée à titre d'exemple de réalisation de la présente invention sur les figures 1A à 1 E, comporte deux montants identiques 2 et 3, chacun formé par un profilé 4 à section en U rectangulaire ouvert, par exemple en aluminium, présentant un canal longitudinal 5. Les deux montants 2 et 3 sont disposés de façon que leurs canaux longitudinaux 5 soient disposés en regard l'un de l'autre.  FIG. 3 illustrates, on a larger scale, the articulation of a ladder bar in the partially folded position, as in FIG. 1B. The scale 1, shown by way of example of embodiment of the present invention on FIGS. 1A to 1E, comprise two identical uprights 2 and 3, each formed by a section 4 having an open rectangular U section, for example made of aluminum, having a longitudinal channel 5. The two uprights 2 and 3 are arranged so that their longitudinal channels 5 are arranged facing one another.

Entre les montants 2 et 3 sont disposés des barreaux transversaux 7, également chacun formé par un profilé à section en U rectangulaire, ouvert vers le bas. Les deux extrémités 7E de chaque barreau 7 pénètrent respectivement dans les canaux 5 en regard des montants 2 et 3 et sont articulés à ceux-ci par des axes 8, 9 orthogonaux auxdits montants 2, 3.  Between the uprights 2 and 3 are arranged transverse bars 7, also each formed by a rectangular U-section section, open downwards. The two ends 7E of each bar 7 penetrate respectively into the channels 5 opposite the uprights 2 and 3 and are hinged thereto by pins 8, 9 orthogonal to said uprights 2, 3.

De plus, chaque barreau 7 est composé de deux demi-barreaux 7.1 et 7.2 dont les faces en regard portent une semelle de contact 10 ou 11 et sont articulées l'une à l'autre par une articulation médiane 12. De préférence, lesdites semelles de contact 10 et 11 font partie intégrante desdites articulations médianes 12. L'axe 13 de chaque articulation médiane 12 est parallèle aux axes d'articulation 8, 9 des extrémités 7E des barreaux 7 et est excentré vers le bas.  In addition, each bar 7 is composed of two half-bars 7.1 and 7.2 whose facing faces bear a contact sole 10 or 11 and are articulated to each other by a median joint 12. Preferably, said insoles contact 10 and 11 form an integral part of said median hinges 12. The axis 13 of each median hinge 12 is parallel to the hinge pins 8, 9 of the ends 7E of the bars 7 and is eccentric downwards.

De ce qui précède, on comprendra aisément (voir également les figures 1B, 1C et 3) que l'échelle 1 peut prendre l'une ou l'autre de deux positions extrêmes: soit la position déployée illustrée par la figure 1A, pour laquelle les montants 2 et 3 sont écartés l'un de l'autre et les deux demi-barreaux 7.1, 7.2 de chaque barreau 7 sont disposés en prolongement l'un de l'autre, les articulations médianes 12 desdits barreaux 7 étant bloquées vers le bas par appui mutuel des semelles de contact 1 0 et 1 1; soit la position repliée illustrée par la figure 1 C, pour laquelle lesdits montants 2 et 3 sont rapprochés l'un de l'autre et les deux demibarreaux 7.1, 7.2 de chaque barreau 7, d'une part, sont repliés l'un sur l'autre avec leur articulation médiane 12 dirigée vers le haut et, d'autre 1 o part, sont respectivement logés dans les canaux 5 en regard des montants 2 et 3, ainsi rapprochés.  From the foregoing, it will be readily understood (see also FIGS. 1B, 1C and 3) that the scale 1 can take one or the other of two extreme positions: the extended position illustrated by FIG. 1A, for which the uprights 2 and 3 are spaced from each other and the two half-bars 7.1, 7.2 of each bar 7 are arranged in extension of one another, the median joints 12 of said bars 7 being blocked towards the low by mutual support of the contact flanges 10 and 11; the folded position illustrated in Figure 1 C, wherein said amounts 2 and 3 are brought closer to each other and the two demibarreaux 7.1, 7.2 of each bar 7, on the one hand, are folded one on the other with their median articulation 12 directed upwards and, on the other hand 1 o part, are respectively housed in the channels 5 facing the uprights 2 and 3, so close together.

Par ailleurs, les montants 2 et 3 sont chacun composés de deux demimontants (respectivement 2I, 2S et 3I, 3S) reliés l'un à l'autre par une articulation 14 ou 15, lesdites articulations étant orthogonales aux axes d'articulation 8, 9 et 13 et alignées l'une par rapport à l'autre.  Moreover, the amounts 2 and 3 are each composed of two demimontants (respectively 2I, 2S and 3I, 3S) connected to one another by a hinge 14 or 15, said hinges being orthogonal to the hinge pins 8, 9 and 13 and aligned with each other.

Ainsi, comme illustré par les figures 1 D et 1 E, les montants 2 et 3 peuvent être repliés l'un sur l'autre, autour des articulations 14 et 15, les demi-montants 2S et 3S venant respectivement au contact des demimontants 2I et 3I.  Thus, as illustrated by Figures 1D and 1E, the uprights 2 and 3 can be folded over one another, around the joints 14 and 15, the half-posts 2S and 3S respectively coming into contact with the demimontants 2I and 3I.

Claims (9)

REVENDICATIONS 1. Echelle comportant deux montants parallèles (2, 3) entre les-quels sont disposés des barreaux transversaux (7), caractérisée en ce que: chacun desdits montants (2, 3) présente un canal longitudinal (5) et lesdits montants sont disposés de façon que leurs canaux (5) soient disposés en regard l'un de l'autre; les extrémités (7E) de chaque barreau (7) pénètrent respectivement dans lesdits canaux (5) en regard et sont articulées dans ceux-ci autour d'axes (8, 9) orthogonaux auxdits montants (2, 3) ; chaque barreau (7) est composé de deux demi-barreaux (7.1, 7.2) dont les faces en regard (10, 11) sont reliées l'une à l'autre par une articulation médiane (12) d'axe (13) parallèle auxdits axes d'articulation (8, 9) des extrémités (7E) desdits barreaux (7) ; et lesdits montants (2, 3) et lesdits barreaux (7) peuvent prendre en com- mun deux positions extrêmes, à savoir: une position repliée pour laquelle lesdits montants (2, 3) sont rapprochés l'un de l'autre et les deux demi- barreaux (7.1, 7.2) de chaque barreau (7), d'une part, sont repliés l'un sur l'autre avec leur articulation médiane (12) dirigée vers le haut et, d'autre part, sont respectivement logés dans lesdits canaux (5) en regard desdits montants rapprochés (2, 3) ; et une position déployée pour laquelle lesdits montants (2, 3) sont écartés l'un de l'autre et les deux demi-barreaux (7.1, 7.2) de cha- que barreau (7) sont disposés en prolongement l'un de l'autre, les articulations médianes (12) desdits barreaux (7) étant bloquées vers le bas par appui mutuel desdites faces (10, 11) en regard desdits demi-barreaux.  1. Scale comprising two parallel uprights (2, 3) between which are arranged transverse bars (7), characterized in that: each of said uprights (2, 3) has a longitudinal channel (5) and said uprights are arranged so that their channels (5) are arranged opposite one another; the ends (7E) of each bar (7) penetrate respectively into said channels (5) opposite and are articulated in them about axes (8, 9) orthogonal to said uprights (2, 3); each bar (7) is composed of two half-bars (7.1, 7.2) whose facing faces (10, 11) are connected to one another by a central joint (12) of axis (13) parallel said hinge pins (8, 9) of the ends (7E) of said bars (7); and said uprights (2, 3) and said bars (7) can take into common two extreme positions, namely: a folded position for which said uprights (2, 3) are brought closer to each other and two half-bars (7.1, 7.2) of each bar (7), on the one hand, are folded over one another with their median articulation (12) directed upwards and, on the other hand, are respectively housed in said channels (5) facing said close uprights (2, 3); and an extended position for which said uprights (2, 3) are spaced from each other and the two half-bars (7.1, 7.2) of each bar (7) are arranged in extension one of the the other, the median joints (12) of said bars (7) being locked down by mutual support of said faces (10, 11) facing said half-bars. 2. Echelle selon la revendication 1, caractérisée en ce que chacune desdites faces en regard desdits demi-barreaux (7.1, 7.2) porte une semelle de contact (10, 11).  2. Scale according to claim 1, characterized in that each of said faces opposite said half-bars (7.1, 7.2) carries a contact flange (10, 11). 3. Echelle selon la revendication 2, caractérisée en ce que lesdites semelles de contact (10, 11) font partie desdites articulations médianes (12).  3. Scale according to claim 2, characterized in that said contact flanges (10, 11) are part of said median joints (12). 4. Echelle selon l'une des revendications 1 à 3,  4. Scale according to one of claims 1 to 3, caractérisée en ce que lesdits barreaux (7) sont réalisés en profilés creux.  characterized in that said bars (7) are made of hollow sections. 5. Echelle selon la revendication 4, 1 o caractérisée en ce que lesdits profilés creux présentent une section en U rectangle.  5. Ladder according to claim 4, 1 o characterized in that said hollow sections have a U-shaped section. 6. Echelle selon l'une des revendications 1 à 5,  6. Scale according to one of claims 1 to 5, caractérisée en ce que lesdits montants (2, 3) sont réalisés en profilé (4) à section au moins approximativement en U.  characterized in that said uprights (2, 3) are made of profile (4) with at least approximately U-section. 7. Echelle selon la revendication 6, caractérisée en ce que ladite section est rectangle.7. Scale according to claim 6, characterized in that said section is rectangle. 8. Echelle selon l'une des revendications 1 à 7,  8. Scale according to one of claims 1 to 7, caractérisée en ce que lesdits montants (2, 3) sont chacun composés d'au moins deux parties (2I, 2S; 3I, 3S) reliées l'une à l'autre par une articula- tion (14, 15) orthogonale auxdits axes d'articulation (8, 9) des barreaux (7), les articulations (14, 15) desdits montants (7) étant deux à deux alignées.  characterized in that said uprights (2, 3) are each composed of at least two parts (2I, 2S, 3I, 3S) connected to one another by an articulation (14, 15) orthogonal to said axes articulation (8, 9) of the bars (7), the joints (14, 15) of said uprights (7) being two in two aligned. 9. Echelle selon la revendication 8, caractérisée en ce que lesdits montants (2, 3) sont chacun composés de deux demi-montants (2I, 2S; 3I, 3S) reliés l'un à l'autre par une articulation (14, 15) orthogonale auxdits axes d'articulation (8, 9, 13) des barreaux (7), les deux articulations (14, 15) desdits montants (7) étant alignées.  9. Scale according to claim 8, characterized in that said uprights (2, 3) are each composed of two half-uprights (2I, 2S, 3I, 3S) connected to one another by a hinge (14, 15) orthogonal to said hinge pins (8, 9, 13) of the bars (7), the two joints (14, 15) of said uprights (7) being aligned.
FR0505794A 2005-06-08 2005-06-08 FOLDABLE LADDER Expired - Fee Related FR2886974B1 (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007015550A1 (en) * 2007-03-30 2008-10-02 Airbus Deutschland Gmbh Ascending module for halting regions of aircraft, has ascending device which has part with side cross-piece and another part with another side cross-piece
CN107255015A (en) * 2017-08-07 2017-10-17 中铁工程装备集团机电工程有限公司 Subway tunnel walks ladder with Combined folded
CN107795270A (en) * 2016-08-30 2018-03-13 刘剑君 A kind of full folding climbing ladder of chain type
CN108423181A (en) * 2017-02-14 2018-08-21 江西昌河航空工业有限公司 A kind of collapsible ascending stair of aircraft door
CN109197137A (en) * 2018-10-31 2019-01-15 长江师范学院 A kind of Tree Fruit picker

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191010778A (en) * 1910-05-02 1910-09-15 Flora Williams Smith Improvements in Foldable Ladders.
US1371125A (en) * 1918-01-05 1921-03-08 Jr Herman Frank Speckman Folding ladder
CH137708A (en) * 1929-04-29 1930-01-31 Pittard Albert Folding ladder.
FR1062385A (en) * 1952-09-03 1954-04-21 folding ladder
GB823849A (en) * 1955-12-19 1959-11-18 Thomas Vincent Hall Improvements in or relating to collapsable ladders
US2981364A (en) * 1959-07-13 1961-04-25 Webber Jack Folding ladder
US4428458A (en) * 1981-05-28 1984-01-31 Turbo Inc. Foldable ladder
US4750587A (en) * 1987-10-16 1988-06-14 William A. McAllister Ladder and method of using ladder for escape

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191010778A (en) * 1910-05-02 1910-09-15 Flora Williams Smith Improvements in Foldable Ladders.
US1371125A (en) * 1918-01-05 1921-03-08 Jr Herman Frank Speckman Folding ladder
CH137708A (en) * 1929-04-29 1930-01-31 Pittard Albert Folding ladder.
FR1062385A (en) * 1952-09-03 1954-04-21 folding ladder
GB823849A (en) * 1955-12-19 1959-11-18 Thomas Vincent Hall Improvements in or relating to collapsable ladders
US2981364A (en) * 1959-07-13 1961-04-25 Webber Jack Folding ladder
US4428458A (en) * 1981-05-28 1984-01-31 Turbo Inc. Foldable ladder
US4750587A (en) * 1987-10-16 1988-06-14 William A. McAllister Ladder and method of using ladder for escape

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007015550A1 (en) * 2007-03-30 2008-10-02 Airbus Deutschland Gmbh Ascending module for halting regions of aircraft, has ascending device which has part with side cross-piece and another part with another side cross-piece
DE102007015550B4 (en) * 2007-03-30 2012-03-08 Airbus Operations Gmbh Stairway for an aircraft with folding ladder
CN107795270A (en) * 2016-08-30 2018-03-13 刘剑君 A kind of full folding climbing ladder of chain type
CN107795270B (en) * 2016-08-30 2019-11-22 刘剑君 A kind of full folding climbing ladder of chain type
CN108423181A (en) * 2017-02-14 2018-08-21 江西昌河航空工业有限公司 A kind of collapsible ascending stair of aircraft door
CN107255015A (en) * 2017-08-07 2017-10-17 中铁工程装备集团机电工程有限公司 Subway tunnel walks ladder with Combined folded
CN107255015B (en) * 2017-08-07 2023-01-06 中铁工程服务有限公司 Combined foldable step ladder for subway tunnel
CN109197137A (en) * 2018-10-31 2019-01-15 长江师范学院 A kind of Tree Fruit picker

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