FR2528902A1 - Extension for ladders - comprises channel shaped element which locates over one of ladder uprights - Google Patents

Extension for ladders - comprises channel shaped element which locates over one of ladder uprights Download PDF

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Publication number
FR2528902A1
FR2528902A1 FR8211237A FR8211237A FR2528902A1 FR 2528902 A1 FR2528902 A1 FR 2528902A1 FR 8211237 A FR8211237 A FR 8211237A FR 8211237 A FR8211237 A FR 8211237A FR 2528902 A1 FR2528902 A1 FR 2528902A1
Authority
FR
France
Prior art keywords
chain
extension
ladder
profile
links
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.)
Pending
Application number
FR8211237A
Other languages
French (fr)
Inventor
Jean-Francois Archer
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.)
ALUFORT SA
Original Assignee
ALUFORT 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 ALUFORT SA filed Critical ALUFORT SA
Priority to FR8211237A priority Critical patent/FR2528902A1/en
Publication of FR2528902A1 publication Critical patent/FR2528902A1/en
Pending legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E06DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06CLADDERS
    • E06C7/00Component parts, supporting parts, or accessories
    • E06C7/42Ladder feet; Supports therefor
    • E06C7/44Means for mounting ladders on uneven ground

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ladders (AREA)

Abstract

The ladder extension comprises a channel-shaped element (3) having inwardly directed free edges which are shaped to slidably locate over one of the ladder uprights (1). One end of a chain (10) is permanently attached to the upper end of the element (3) whilst the other end passes beneath the lowest rung (2a) and is then releasably secured to the upper end of the element. The free end of the chain (10) pref. releasably engages into a slot (9b) in a bracket (7) which is secured to the upper end of the element allowing the length of the chain to be adjusted.

Description

Rallonge pour échelle.Extension for ladder.

I1 arrive fréquemment qu'une échelle doive être posée sur un sol présentant une déclivité, par exemple sur les marches d'un escalier. Pour que l'échelle ait son axe situé dans un plan vertical, ce qui est une condition nécessaire à sa stabilité, on est donc obligé de placer une cale sous l'un des montants. Mais cette cale risque de glisser et il se peut qu'on ne dispose pas de cale ayant l'épaisseur nécessaire. It frequently happens that a ladder must be placed on a floor with a slope, for example on the steps of a staircase. So that the ladder has its axis located in a vertical plane, which is a necessary condition for its stability, we are therefore obliged to place a wedge under one of the uprights. However, this wedge risks slipping and it may not be possible to have a wedge having the necessary thickness.

La présente invention a pour objet une rallonge pour échelle qui remédie à cet inconvénient. The present invention relates to an extension for a ladder which overcomes this drawback.

La rallonge selon l'invention est caractérisée en ce qu'elle comporte un profilé dont la forme et les dimensions lui permettent d'étire enfilé avec un jeu réduit sur un montant de l'échel- le en empêchant ensuite son dégagement transversal, une chaine à maillons dont une extrémité est fixée à l'extérieur du profilé, à la partie supérieure de celui-ci, et des moyens pour fixer la chatne, à l'endroit désiré de sa portion d'extrémité opposée, à la partie supérieure dudit profilé. Le profilé est emmanché sur un montant de façon à faire saillie de la longueur désiree, par rapport à l'extrémité inférieure de ce montant; on le verouille ensuite en position en faisant passer la channe autour d'un barreau inférieur de l'échelle et en attachant cette chaîne au profilé, de manière qu'elle soit tendue. The extension according to the invention is characterized in that it comprises a profile whose shape and dimensions allow it to stretch threaded with a reduced clearance on an amount of the ladder, then preventing its transverse release, a chain with links, one end of which is fixed to the outside of the profile, at the upper part of the latter, and means for fixing the chain, at the desired location of its opposite end portion, to the upper part of said profile . The profile is fitted on an upright so as to project the desired length, relative to the lower end of this upright; it is then locked in position by passing the chain around a lower rung of the ladder and by attaching this chain to the profile, so that it is taut.

Dans un mode de réalisation préféré de l'invention, le profilé porte à sa partie supérieure une ferrure extérieure à laquelle est fixée l'une des extrémités de la channe et qui comporte une fente de verrouillage de largeur légèrement supérieure à l'épaisseur des maillons de la chaîne et de longueur au moins égale à la largeur de ces maillons. In a preferred embodiment of the invention, the profile carries at its upper part an external fitting to which is fixed one of the ends of the chain and which has a locking slot of width slightly greater than the thickness of the links of the chain and of length at least equal to the width of these links.

On a décrit ci-après, à titre d'exemple non limitatif, un mode de réalisation de la rallonge selon l'invention, avec référence au dessin annexé dans lequel
La Figure 1 est une vue en perspective d'une échelle dont
un montant est muni de la rallonge;
La Figure 2 est une coupe transversale de la rallonge.
An embodiment of the extension according to the invention has been described below, by way of non-limiting example, with reference to the appended drawing in which
Figure 1 is a perspective view of a ladder of which
an upright is provided with the extension;
Figure 2 is a cross section of the extension.

Telle qu'elle est représentée au dessin, la rallonge selon l'invention est destinée à être montée sur une échelle comprenant des montants 1 et des barreaux 2. As shown in the drawing, the extension according to the invention is intended to be mounted on a ladder comprising uprights 1 and bars 2.

La rallonge comporte un profilé 3 qui peut coulisser avec un faible jeu sur un montant I et est conformé de manière à ne pouvoir se dégager transversalement du montant lors que ce dernier y est enfilé. Ce profilé comporte à sa partie inférieure un patin 4 maintenu par une patte rivée 5 et un boulon 6. The extension comprises a profile 3 which can slide with little play on an upright I and is shaped so as to be unable to disengage transversely from the upright when the latter is threaded therein. This profile has at its lower part a shoe 4 held by a riveted tab 5 and a bolt 6.

Une ferrure 7 est fixée par des boulons ou rivets 8 à l'extérieur du profilé 3, à la partie supérieure de celui-ci. A fitting 7 is fixed by bolts or rivets 8 to the outside of the profile 3, at the top of the latter.

Cette ferrure a une section en U et ses ailes 7a et 7b sont munies de fentes obliques 9a et 9b débouchant à l'extérieur. This fitting has a U-shaped section and its wings 7a and 7b are provided with oblique slots 9a and 9b opening to the outside.

Le profilé 3 est associé à une chaîne à maillons 10; l'epais- seur des maillons de cette diamine est légèrement inférieure à la largeur des fentes 9a et 9b et la longueur de ces fentes est nettement supérieure à la largeur des maillons. L'une des extrémités de la chaîne est fixée à l'aile 7a de la ferrure, par engagement du second maillon d'extrémité lOa de la chalne dans la fente 9a et soudure de ce maillon à l'aile 7a, comme indiqué en 11. Profile 3 is associated with a link chain 10; the thickness of the links of this diamine is slightly less than the width of the slots 9a and 9b and the length of these slots is clearly greater than the width of the links. One end of the chain is fixed to the wing 7a of the fitting, by engagement of the second end link lOa of the chain in the slot 9a and welding of this link to the wing 7a, as indicated in 11 .

Pour utiliser la rallonge qui vient d'être décrite, on enfile le profilé 3 sur l'un des montants 1 de l'échelle et on le place à la position convenable en fonction de la déclivité du sol 12. Puis, on immobilise le profilé à l'aide de la chaine 10 qu'on fait passer sous un barreau inferieur 2a et qu'on fixe à l'aile 7b de la ferrure 7, par engagement dans la fente 9b du maillon convenable lOb de la channe. Etant donné le mouflage de cette channe, il est possible de fixer la rallonge dans des positions écartées l'une de l'autre d'une distance égale de la moitié du pas de la chaîne 10. To use the extension which has just been described, the profile 3 is threaded onto one of the uprights 1 of the ladder and it is placed in the appropriate position according to the slope of the ground 12. Then, the profile is immobilized using the chain 10 which is passed under a lower bar 2a and which is fixed to the wing 7b of the fitting 7, by engagement in the slot 9b of the suitable link lOb of the chain. Given the hauling of this chain, it is possible to fix the extension in positions spaced from each other by a distance equal to half the pitch of the chain 10.

Pour assurer la protection de la channe, celle-ci, à l'exception de sa partie servant au réglage, peut être recouverue d'une gaine 13. To protect the chain, it, with the exception of its part used for adjustment, can be covered with a sheath 13.

il va de soi que la présente invention ne doit pas être limitée au mode de réalisation décrit et représenté, mais en couvre, au contraire, toutes les variantes.  it goes without saying that the present invention should not be limited to the embodiment described and shown, but on the contrary covers all variants.

Claims (3)

REVENDICATIONS 1.- Rallonge pour échelle caractérisée en ce qu'elle comporte un profilé 3 dont la forme et les dimensions lui permettent d'étire enfilé avec un jeu réduit sur un montant 1 de l'échelle en empêchant ensuite son dégagement transversal, une channe à maillons 10 dont une extrOmité est fixée à l'extérieur du profilé, à la partie supérieure de celui-ci, et des moyens pour fixer la chaîne 10, à l'endroit désiré de sa portion d'extrémité opposée, à la partie supérieure dudit profilé. 1.- Extension for ladder characterized in that it comprises a profile 3 whose shape and dimensions allow it to stretch threaded with a reduced clearance on an upright 1 of the ladder, then preventing its transverse release, a channel to links 10, one end of which is fixed to the outside of the profile, at the top of the latter, and means for fixing the chain 10, at the desired location of its opposite end portion, to the top of said streamlined. 2.- Rallonge selon la revendication 1, caractérisée en ce que le profilé 3 porte à sa partie supérieure une ferrure extérieure 7 à laquelle est fixée l'une des extrémités de la chaine et qui comporte une fente de verrouillage 9b de largeur légèrement supérieure à l'épaisseur des maillons de la channe et de longueur au moine égale à la largeur de ces maillons. 2. An extension according to claim 1, characterized in that the profile 3 carries at its upper part an external fitting 7 to which is fixed one of the ends of the chain and which comprises a locking slot 9b of width slightly greater than the thickness of the chain links and length to the monk equal to the width of these links. 3.- Rallonge selon la revendication 1 ou 2, caractérisée en ce que la chatne 10 est recouverte, à l'exception de sa partie servant au réglage, d'une gaine de protection 13.  3. An extension according to claim 1 or 2, characterized in that the cat 10 is covered, with the exception of its part serving for adjustment, with a protective sheath 13.
FR8211237A 1982-06-22 1982-06-22 Extension for ladders - comprises channel shaped element which locates over one of ladder uprights Pending FR2528902A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8211237A FR2528902A1 (en) 1982-06-22 1982-06-22 Extension for ladders - comprises channel shaped element which locates over one of ladder uprights

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8211237A FR2528902A1 (en) 1982-06-22 1982-06-22 Extension for ladders - comprises channel shaped element which locates over one of ladder uprights

Publications (1)

Publication Number Publication Date
FR2528902A1 true FR2528902A1 (en) 1983-12-23

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Application Number Title Priority Date Filing Date
FR8211237A Pending FR2528902A1 (en) 1982-06-22 1982-06-22 Extension for ladders - comprises channel shaped element which locates over one of ladder uprights

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Country Link
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997005359A1 (en) * 1995-07-31 1997-02-13 Gregory John Schwarzel Extendable leg means for levelling ladders and the like
AU2003204016B2 (en) * 1995-07-31 2006-08-24 Gregory John Schwarzel Extendable Leg Means for Levelling Ladders and the Like

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1832648A (en) * 1929-07-17 1931-11-17 Morgan Thornton Flem Equalizer for ladders
US2057777A (en) * 1936-06-05 1936-10-20 William L Hobbs Extension attachment for ladders, scaffolds and the like
US2889099A (en) * 1955-04-01 1959-06-02 M W P Appliances Inc Ladder construction
US3933222A (en) * 1974-09-25 1976-01-20 James E. Jenkins Ladder leveler

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1832648A (en) * 1929-07-17 1931-11-17 Morgan Thornton Flem Equalizer for ladders
US2057777A (en) * 1936-06-05 1936-10-20 William L Hobbs Extension attachment for ladders, scaffolds and the like
US2889099A (en) * 1955-04-01 1959-06-02 M W P Appliances Inc Ladder construction
US3933222A (en) * 1974-09-25 1976-01-20 James E. Jenkins Ladder leveler

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997005359A1 (en) * 1995-07-31 1997-02-13 Gregory John Schwarzel Extendable leg means for levelling ladders and the like
US6237718B1 (en) 1995-07-31 2001-05-29 Gregory John Schwarzel Extendable leg means for levelling ladders and the like
AU2003204016B2 (en) * 1995-07-31 2006-08-24 Gregory John Schwarzel Extendable Leg Means for Levelling Ladders and the Like

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