EP1686233A1 - Echelle escamotable multifonctionnelle - Google Patents

Echelle escamotable multifonctionnelle Download PDF

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Publication number
EP1686233A1
EP1686233A1 EP05002007A EP05002007A EP1686233A1 EP 1686233 A1 EP1686233 A1 EP 1686233A1 EP 05002007 A EP05002007 A EP 05002007A EP 05002007 A EP05002007 A EP 05002007A EP 1686233 A1 EP1686233 A1 EP 1686233A1
Authority
EP
European Patent Office
Prior art keywords
ladder
collapsible
section
sections
legs
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.)
Withdrawn
Application number
EP05002007A
Other languages
German (de)
English (en)
Inventor
Per-Olof Eriksson
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.)
Telesteps AB
Original Assignee
Telesteps AB
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 Telesteps AB filed Critical Telesteps AB
Priority to EP05002007A priority Critical patent/EP1686233A1/fr
Priority to PCT/EP2006/000856 priority patent/WO2006082032A1/fr
Priority to AU2006210078A priority patent/AU2006210078A1/en
Priority to CNA2006800037673A priority patent/CN101111658A/zh
Priority to NZ556606A priority patent/NZ556606A/en
Priority to CA002594804A priority patent/CA2594804A1/fr
Priority to EA200701641A priority patent/EA012890B1/ru
Priority to JP2007552599A priority patent/JP2008528834A/ja
Publication of EP1686233A1 publication Critical patent/EP1686233A1/fr
Priority to NO20074352A priority patent/NO20074352L/no
Withdrawn legal-status Critical Current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
    • E06C1/14—Ladders capable of standing by themselves
    • E06C1/16—Ladders capable of standing by themselves with hinged struts which rest on the ground
    • E06C1/20—Ladders capable of standing by themselves with hinged struts which rest on the ground with supporting struts formed as poles
    • E06C1/22—Ladders capable of standing by themselves with hinged struts which rest on the ground with supporting struts formed as poles with extensible, e.g. telescopic, ladder parts or struts
    • 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
    • E06C1/04—Ladders for resting against objects, e.g. walls poles, trees
    • E06C1/08—Ladders for resting against objects, e.g. walls poles, trees multi-part
    • E06C1/12—Ladders for resting against objects, e.g. walls poles, trees multi-part extensible, e.g. telescopic
    • E06C1/125—Ladders for resting against objects, e.g. walls poles, trees multi-part extensible, e.g. telescopic with tubular longitudinal members nested within each other
    • 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

  • the present invention relates to a collapsible stepladder provided with ladder sections being telescopically inserted in each other.
  • stepladders Collapsible and expandable stepladders are known in the art. Below examples of prior art are stepladders described.
  • a telescopically collapsible stepladder comprising two legs that are hinged to one another.
  • Each leg is formed of telescopically collapsible sections having latch mechanisms in each of the rungs for automatically locking the sections relative to one another when the leg is extended.
  • the latch mechanisms in each rung are designed to release the next higher section when the rung is collapsed against the next lower rung.
  • the separation of the rungs of one of the legs, when the stepladder is extended, is greater than the separation of the rungs in the other leg.
  • stepladder of WO-A1-99/51848 The problem with the stepladder of WO-A1-99/51848 is that the collapsible sections of the two legs have different height, which is why the stepladder will never pass type approval. Further, the stepladder can not be converted to a straight ladder, since folding the two legs to be adjacent, results in a ladder with many small steps due to the different height of collapsible sections.
  • a ladder including two hinged sections that can be oriented in an inverted V-configuration for use as a stepladder, or in a straight linear configuration for use as a straight ladder.
  • Each section of the ladder includes a number of U-shaped support units, each of which defines a crossbar and two downwardly extending side rails.
  • the side rails of the different U-shaped units are of graduated cross sectional dimensions, so that the units can be contracted together by telescopically sliding the aligned side rails within one another.
  • the problem with the ladder of US-A-4 989 692 is that the two sections of the ladder can not be used without an external support or the user will need to balance while working, which is not preferable from a work safety aspect.
  • GB-A-2 110 286 another stepladder is disclosed, including a first set of strong and telescopic elements, a second set of parts, each comprising a support surface forming one step of the ladder. Each part is transversely connected to one element or group of strong elements of the first set.
  • a set of stopper studs and locking means between the various strong elements of the first set is arranged to ensure at least the stability of the two extreme positions of the ladder, that is, of the ladder folded up on itself and of the extended ladder.
  • the ladder of GB-A-2 110 286 not only suffers from the same problems as US-A-4 989 692, but also lacks a locking or fixing arrangement in the converted disposition.
  • the object of the present invention is to overcome the disadvantages and problems with the prior art step ladders and to provide a stepladder which is easy and safe to handle and which is possible to convert into a straight ladder without lowering the standards of safety and manageability.
  • a stepladder according to the characterizing features of claim 1 solves the above problem.
  • FIG. 1 shows a collapsible stepladder 1 comprising a first ladder leg 2, which is hingedly connected to a second ladder leg 3 in the upper ends of the first and second ladder leg 2, 3 by a hinge connection 5.
  • Each of the ladder legs 2, 3 comprise several ladder sections 4a-4d, where each ladder section 4a-4d comprises two ladder bars 6, 7, arranged parallel to each other and interconnected at one end by a rung 8 to form a U-shaped ladder section 4a-4d.
  • the ladder sections 4a-4d are telescopically inserted into a lower ladder section to form a collapsible ladder leg 2, 3.
  • the ladder legs 2, 3 further comprise a lower ladder section 4e, which comprises two ladder bars 6, 7, arranged parallel to each other and interconnected at a upper end by a rung 9, at a lower end by a ladder base 10 and in between the rung 9 and the ladder base 10 by another rung 11.
  • the ladder sections 4a-4d are telescopically inserted into the ladder section 4e.
  • the ladder legs 2,3 should comprise at least three ladder sections 4a-4e, but in a preferred embodiment four collapsible ladder sections 4a-4d are arranged together with the lower ladder section 4e.
  • the number of ladder sections is limited by the stability of the stepladder and the requirement to pass type approval.
  • Each rung 8, 9 comprises a retaining mechanism for automatically locking the ladder sections relative to one another when the ladder legs 2,3 are extended.
  • the retaining mechanism could be any kind previously known in the art, e.g. any of the retaining mechanisms shown in EP-B1-0 527 766 or EP-A1-1 402 143.
  • the second ladder leg 3 is provided with a support part 12 in one end.
  • the support part 12 is telescopically extendible from the second ladder leg 3 to form a ladder extension 12 of the ladder leg 3, and the support part 12 projects above the hinge connection 5 between the two ladder legs 2, 3.
  • the support part 12 comprise at least one support section 12a-12b, each support section comprising two ladder bars 6, 7 arranged parallel to each other and interconnected at one end by a rung 16 to form at least one U-shaped support section 12a-12b.
  • the support sections 12a-12b are telescopically inserted into the ladder leg 3 to form a collapsible support part 12.
  • the support part 12 also comprises an upper support section 12c, comprising two ladder bars 6, 7, arranged parallel to each other and interconnected at one end by a rung 13 to form a U-shaped support section 12c.
  • the support section 12c is telescopically inserted into the lower support section 12a-12b.
  • the ladder is shown, having both ladder legs 2, 3 and the support or extension part 12 fully extended.
  • the support part 12 enables the user of the stepladder to stand on the upper ladder section 4a-4b as the support part 12 makes the user feel safe.
  • the support part 12 comprises two collapsible ladder sections 12a and 12c.
  • a device for holding tools or objects such as a tray, a table, a shelf, a box/case or a basket, can be arranged.
  • the device is clamped, squeezed, hanged, hooked or in any other suitable manner arranged to be positioned at the upper rung 13.
  • the rung 13 might be arranged with receiving means such as holes, chamfered surfaces, recesses or the like to better receive the holding device.
  • a strap 14 is also shown arranged between the ladder legs 2, 3 to increase the stability of the ladder in the extended and folded mode and to prevent the ladder legs from splaying apart.
  • the strap 14 is attached by suit fastening means, e.g. a pop rivet or the like, in one end to a rear side of a rung 8 of the ladder leg 2 and in another end to a rear side of a rung 8 of the ladder leg 3.
  • the strap 14 is attached to the rungs 8 positioned on ladder section 4e of the ladder legs 2, 3, respectively, but it would also be possible to attach the strap 14 to rungs associated with ladder sections located above or below ladder sections 4e.
  • the strap 14 is also shown in Figs. 3 and 5, but has been omitted in Figs. 1 and 4 for clarity reasons.
  • the strap 14 can be made of nylon woven nylon material.
  • Fig. 3 is shown how the hinge connection 5 almost creates a platform between the upper part of the ladder legs 2, 3, that can be used for placing a toolbox or the like or to stand on.
  • Figs. 4 and 5 the ladder section 4d of the ladder leg 2 is collapsed.
  • the stepladder 1 is converted to a straight ladder, which is positioned against a wall.
  • the support part 12 enables the ladder to be leaned against the wall without the ladder leg 2 interfering or instabilizing the ladder in the leaned position. Since the ladder section 4d of the ladder leg 2 is collapsed, the ladder leg 2 is hanging freely and out of the way when the ladder is converted to a straight ladder. Any or several of the collapsible ladder sections 4a-4d can be collapsed.
  • a holding means 15 holds the collapsed ladder sections and the ladder section positioned adjacently below the collapsed ladder sections together.
  • the holding means is a strap 15 of a nylon material, but it can also be a hook, which is attached to the rung of one ladder section and which can be pivoted so that the hook part is surrounds the rung of an adjacently positioned ladder section. It is also possible to use a U-shaped clamp of a plastic material, which holds the rungs of the collapsed ladder sections and the ladder section positioned adjacently below the collapsed ladder sections together.
  • the advantage with a clamp is that any of the ladder sections 4a-4d can be collapsed and held my the clamp, whereas the location of a hook or a strap decides which collapsible ladder sections 4a-4d should be collapsed and held together with the ladder section positioned adjacently below the collapsed ladder section.
  • the retaining mechanism or more the specifically the locking pins of the retaining mechanism can be used to hold or lock a collapsed collapsible ladder sections 4a-4d in relation to a ladder section positioned adjacently below the collapsed ladder section 4a-4d.
  • the ladder section 4d is collapsed and the strap 15, i.e. the holding means, surrounds the collapsed ladder section 4d and the ladder section 4e of the ladder leg 2.
  • the strap 15 is preferably attached to one of the rungs 8, 9 and being long enough to surround the rungs of the collapsed ladder sections and the rung of the ladder section positioned adjacently below the collapsed ladder sections.
  • the strap 15 is attached to rung 9 by a pop rivet or any other suitable fastening means.
  • the strap 15 is fastened by the center of the strap 15 so that the strap extends substantially equally in both directions from the fastening position.
  • Velcro ⁇ fasteners or similar fastening means are provided that interacts with each other when the strap ends surround the rungs.
  • the ladder sections 4b-4e of the ladder leg 3 are suitably designed with deeper rungs 8, 9, 11 (see Figs. 3 and 5) to provide an extra foot support compared with the rungs of the ladder sections of the ladder leg 2.
  • the rungs are suitably made of an extruded aluminum profile.
  • At least one collapsible ladder section 4a-4d of the first ladder leg 2 is collapsed to enable the ladder to be used as a straight ladder.
  • the holding means 15 can in that case be used to maintain the two ladder legs 2, 3 in the adjacent and parallel position.
  • the lower ladder section 4e of the second ladder leg 3 could in that case be longer than the lower ladder section 4e of the first ladder leg 2 so that both lower end parts of the two ladder legs 2, 3 are supported by the ground at the same time.
EP05002007A 2005-02-01 2005-02-01 Echelle escamotable multifonctionnelle Withdrawn EP1686233A1 (fr)

Priority Applications (9)

Application Number Priority Date Filing Date Title
EP05002007A EP1686233A1 (fr) 2005-02-01 2005-02-01 Echelle escamotable multifonctionnelle
PCT/EP2006/000856 WO2006082032A1 (fr) 2005-02-01 2006-02-01 Echelle transformable pliante
AU2006210078A AU2006210078A1 (en) 2005-02-01 2006-02-01 Collapsible combination ladder
CNA2006800037673A CN101111658A (zh) 2005-02-01 2006-02-01 可折叠复合梯
NZ556606A NZ556606A (en) 2005-02-01 2006-02-01 Collapsible combination ladder with telescopic legs one ladder section having wider steps than the other
CA002594804A CA2594804A1 (fr) 2005-02-01 2006-02-01 Echelle transformable pliante
EA200701641A EA012890B1 (ru) 2005-02-01 2006-02-01 Складная комбинированная лестница
JP2007552599A JP2008528834A (ja) 2005-02-01 2006-02-01 折畳み式組合せ梯子
NO20074352A NO20074352L (no) 2005-02-01 2007-08-27 Collapsible combination ladder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05002007A EP1686233A1 (fr) 2005-02-01 2005-02-01 Echelle escamotable multifonctionnelle

Publications (1)

Publication Number Publication Date
EP1686233A1 true EP1686233A1 (fr) 2006-08-02

Family

ID=34933538

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05002007A Withdrawn EP1686233A1 (fr) 2005-02-01 2005-02-01 Echelle escamotable multifonctionnelle

Country Status (9)

Country Link
EP (1) EP1686233A1 (fr)
JP (1) JP2008528834A (fr)
CN (1) CN101111658A (fr)
AU (1) AU2006210078A1 (fr)
CA (1) CA2594804A1 (fr)
EA (1) EA012890B1 (fr)
NO (1) NO20074352L (fr)
NZ (1) NZ556606A (fr)
WO (1) WO2006082032A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008052433A1 (fr) * 2006-10-31 2008-05-08 Zhengping Su Structure de raccordement pour échelles
CN105221058A (zh) * 2015-09-16 2016-01-06 国网辽宁省电力有限公司锦州供电公司 变电站室内分节绝缘梯
CN105332644A (zh) * 2015-11-23 2016-02-17 乐山市同源科技有限公司 多功能梯
US10480211B2 (en) 2013-12-04 2019-11-19 Nondrill Pty Ltd Handrail assembly, system and method of installation
NL2029224B1 (en) 2021-09-22 2023-03-29 Lampe Holding Bv Portable ladder with a stand off device
SE545153C2 (en) * 2021-12-16 2023-04-18 Telesteps Ab Collapsible step ladder and a connection bracket therefor

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8225906B2 (en) 2008-08-22 2012-07-24 Core Distribution, Inc. Extendable/retractable ladder
US10233692B2 (en) 2014-12-02 2019-03-19 Core Distribution, Inc. Foldable ladder
RU2635150C2 (ru) * 2015-10-09 2017-11-09 Общество с ограниченной ответственностью"Инвестпроект" Фиксирующее устройство для удлиняющейся лестницы
KR101767014B1 (ko) * 2016-11-02 2017-08-09 서동영 전동 드라이버로 길이 조절이 가능한 자동 사다리
US11174678B2 (en) 2017-11-08 2021-11-16 Core Distribution, Inc. Locking assembly for a telescoping ladder
CN108049798A (zh) * 2017-12-15 2018-05-18 潘跃进 单边伸缩梯后支撑架
RU2679762C2 (ru) * 2018-05-07 2019-02-12 Александр Михайлович Гультяев Лестница с ящиками
CN108868569A (zh) * 2018-05-22 2018-11-23 苏州盈腾五金制品有限公司 一种消防用便携式伸缩爬梯
US11795760B2 (en) 2019-10-24 2023-10-24 Core Distribution, Inc. Ladder tripod assembly and system
RU199345U1 (ru) * 2020-06-24 2020-08-28 Общество с ограниченной ответственностью «ТЦ Телекоммонтаж» Складная лестница
RU210209U1 (ru) * 2021-10-06 2022-03-31 Сергей Анатольевич Денисенко Лестничная секция

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2127949A (en) * 1936-05-08 1938-08-23 Zeman Paul Folding ladder
FR2435596A1 (fr) * 1978-07-24 1980-04-04 Gubri Sa Ets L Dispositif pour la limitation de l'ecartement et du developpement des plans d'une echelle transformable
GB2110286A (en) 1981-05-08 1983-06-15 Bier And Son I Light and extensible ladder
US4989692A (en) 1989-06-16 1991-02-05 Min Liaw S Multi-purpose extendable and retractable ladder
WO1999051848A1 (fr) 1998-04-04 1999-10-14 Eriksson, Per-Olof Escabeau repliable

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5045451Y2 (fr) * 1971-06-29 1975-12-23

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2127949A (en) * 1936-05-08 1938-08-23 Zeman Paul Folding ladder
FR2435596A1 (fr) * 1978-07-24 1980-04-04 Gubri Sa Ets L Dispositif pour la limitation de l'ecartement et du developpement des plans d'une echelle transformable
GB2110286A (en) 1981-05-08 1983-06-15 Bier And Son I Light and extensible ladder
US4989692A (en) 1989-06-16 1991-02-05 Min Liaw S Multi-purpose extendable and retractable ladder
WO1999051848A1 (fr) 1998-04-04 1999-10-14 Eriksson, Per-Olof Escabeau repliable

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008052433A1 (fr) * 2006-10-31 2008-05-08 Zhengping Su Structure de raccordement pour échelles
US10480211B2 (en) 2013-12-04 2019-11-19 Nondrill Pty Ltd Handrail assembly, system and method of installation
CN105221058A (zh) * 2015-09-16 2016-01-06 国网辽宁省电力有限公司锦州供电公司 变电站室内分节绝缘梯
CN105332644A (zh) * 2015-11-23 2016-02-17 乐山市同源科技有限公司 多功能梯
NL2029224B1 (en) 2021-09-22 2023-03-29 Lampe Holding Bv Portable ladder with a stand off device
WO2023046760A1 (fr) 2021-09-22 2023-03-30 Lampe Holding B.V. Échelle portable comportant un dispositif de recul
SE545153C2 (en) * 2021-12-16 2023-04-18 Telesteps Ab Collapsible step ladder and a connection bracket therefor
SE2151545A1 (en) * 2021-12-16 2023-04-18 Telesteps Ab Collapsible step ladder and a connection bracket therefor
WO2023113684A1 (fr) * 2021-12-16 2023-06-22 Telesteps Ab Escabeau pliant et support de raccordement s'y rapportant

Also Published As

Publication number Publication date
AU2006210078A1 (en) 2006-08-10
EA012890B1 (ru) 2009-12-30
NZ556606A (en) 2011-01-28
CA2594804A1 (fr) 2006-08-10
NO20074352L (no) 2007-10-28
WO2006082032A1 (fr) 2006-08-10
EA200701641A1 (ru) 2008-02-28
JP2008528834A (ja) 2008-07-31
CN101111658A (zh) 2008-01-23

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