EP0108155B1 - Echelle pliante - Google Patents

Echelle pliante Download PDF

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Publication number
EP0108155B1
EP0108155B1 EP82110080A EP82110080A EP0108155B1 EP 0108155 B1 EP0108155 B1 EP 0108155B1 EP 82110080 A EP82110080 A EP 82110080A EP 82110080 A EP82110080 A EP 82110080A EP 0108155 B1 EP0108155 B1 EP 0108155B1
Authority
EP
European Patent Office
Prior art keywords
scissors
link
hinged
members
scissor
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.)
Expired
Application number
EP82110080A
Other languages
German (de)
English (en)
Other versions
EP0108155A1 (fr
Inventor
Peter Hechler
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.)
Helm Geb Neundorfer Cacilia
Original Assignee
Helm Geb Neundorfer Cacilia
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 Helm Geb Neundorfer Cacilia filed Critical Helm Geb Neundorfer Cacilia
Priority to AT82110080T priority Critical patent/ATE23599T1/de
Priority to EP82110080A priority patent/EP0108155B1/fr
Publication of EP0108155A1 publication Critical patent/EP0108155A1/fr
Application granted granted Critical
Publication of EP0108155B1 publication Critical patent/EP0108155B1/fr
Expired 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
    • E06C1/39—Ladders having platforms; Ladders changeable into platforms
    • E06C1/393—Ladders having platforms foldable 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
    • E06C1/20—Ladders capable of standing by themselves with hinged struts which rest on the ground with supporting struts formed as poles
    • 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
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C7/00—Component parts, supporting parts, or accessories
    • E06C7/42—Ladder feet; Supports therefor
    • E06C7/423—Ladder stabilising struts

Definitions

  • the invention relates to a stepladder with at least one riser, consisting of two risers with steps arranged between them, on which a support leg having two support legs is hinged by means of a pair of scissors connecting a stand with the associated support leg, which consists of two scissor members connected in a scissor joint , and with at least one laterally fold-out side support, which is connected to the scissors via at least one link.
  • the articulated axes of the scissors run horizontally in a known manner, i. H. the scissor links move in the vertical plane in which the folding of the ladder parts takes place.
  • the link attached to the side support is articulated on the side of the scissor joint. Therefore, this link member of the side support can give little stability transversely to the folding movement of the side support, i. H. the side support is relatively unstable to the front and back; Forces exerted in this direction, for example when moving the conductors, act as bending forces at the articulation points, which can lead to increased wear or damage.
  • the forces transmitted from the side support via the link member act transversely to the level of the scissors and therefore act as bending forces in the scissor joint and at the articulation points of the scissors, i. H. if a lateral force is exerted on the side support, the scissor links are pressed inwards or outwards from their plane and possibly even deformed.
  • this proposal is hardly suitable, in particular, for stepladders that need to be built easily and in a space-saving manner, namely household ladders.
  • the invention is therefore based on the object of designing a stepladder of the type mentioned at the outset in such a way that very stable guidance and securing of the side support or supports is achieved by relatively light and space-saving components.
  • the scissors designed in this way move in the horizontal direction, as do the two links that lead to the side support.
  • the scissor members and the link members made of relatively thin flat material, none of these components is stressed transversely to its surface plane; this avoids bending stresses on the joints.
  • the diverging link members form a stable support for the side support, so that the side support that is automatically expanded when the stepladder is opened remains stable in its specified position when subjected to loads from any direction.
  • the scissor links and the link links linked to them are moved inwards when the stepladder is closed and therefore do not interfere.
  • the scissors or the scissors are or are arranged just below the safety bridge. In this area, the scissors and the handlebar links do not interfere even when opened.
  • the bridge lifter for the safety bridge also takes on the function of the spreading device. Since the scissors in this embodiment are in the immediate vicinity of the spreading protection thus formed, the scissors are held in a particularly secure manner in the opened state; also strong lateral forces exerted on the side support could not change the spreading angle of the stepladder.
  • the step ladder shown in FIG. 1, which can be climbed on one side, has a climbing leg 1 and a supporting leg 2, which are hingedly connected to one another at articulation points 3.
  • the riser 1 consists of two risers 4 with steps 5 arranged therebetween; the risers 4 are connected at their upper end by a bracket 6.
  • the support leg 2 consists of two support bars 7 which are connected to one another by an upper and a lower cross strut 8.
  • a safety bridge 9 is located between the riser leg 1 and the support leg 2 in the upper region of the ladder, which is actuated by a bridge lifter (not shown) arranged underneath, which at the same time forms the spreading protection.
  • two lateral, disk-shaped cheeks 10 are arranged on the risers 4, between which the upper ends of the support bars 7 are pivotably mounted.
  • a hinge pin 11 is inserted through the outer cheek 10 and fastened on the inside with a split pin 12, which has a horizontal hinge axis 13 for a side support 14, which is folded out laterally when the stepladder is opened.
  • the uprights 4 are each connected to the support spars 7 (FIGS. 3 and 4) by means of a pair of scissors 15 which consist of two scissor members 17 made of flat material which are connected to one another in a scissor joint 16.
  • the scissor members 17 are articulated on articulation points 18 with a substantially vertical articulation axis, but with a certain angular play in the vertical direction, on the climbing beam 4 and on the support beam 7.
  • the scissor links 17 assume an almost extended position.
  • a link member 20 is articulated in each case on a hinge point 19 with a vertical hinge axis, which lies between the scissor hinge and the hinge point 18. Both link members 20 are jointly articulated at a hinge point 21 with a vertical hinge axis on the side support 14.
  • the scissors 15 are located just below the safety bridge 9.
  • the two scissors 15 move in a horizontal plane against each other inwards up to the position shown in Fig.4, the side supports 14 by the Handlebar members 20 are pulled inwards until they are practically in contact with the folded uprights 4 and support bars 7.
  • the fold-out angle of the side support 14 can be chosen to be larger or smaller.
  • the side supports 14 can be designed to be removable, with easily detachable connections also being provided in the articulation points 19, for example.
  • the articulation of the side supports 14 can also take place at another location, for example on the riser 4 above or below the articulation point 3.
  • Fig. 4 is indicated at "S with dash-dotted lines only on a part of the scheron 15 that the scissor members 17 and the link members 20 can also be curved so that in the collapsed state of the scissors there are still enough wide spaces between the scissor members, to avoid the risk of fingers getting caught.

Landscapes

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

Claims (4)

1. Echelle pliante comportant au moins une branche franchissable (1) constituée par deux montants (4) comportant entre eux des échelons (5), branche franchissable (1) à laquelle est articulée, de manière dépliable, une branche d'appui (2) comportant deux montants d'appui (7), moyennant des paires de ciseaux (15) reliant l'un des montants (4) au montant d'appui correspondant (7) et qui sont constitués par deux ciseaux (17) reliés par une articulation à la manière de ciseaux (16), ladite échelle comportant également au moins un moyen d'appui latéral (14) rabattable qui est relié par au moins un bras de guidage (20) à la paire de ciseaux (15), caractérisée en ce que les paires de ciseaux (15) sont articulées au moyen d'axes d'articulation verticaux au montant (4), au montant d'appui (7) et dans l'articulation à la manière de ciseaux (16) et sont déplaçables horizontalement et en ce que deux bras de guidage (20) horizontaux articulés à l'appui latéral (14) moyennant un axe d'articulation commun vertical, s'étendent de manière divergente vers chaque fois un point d'articulation (19) comportant un axe d'articulation vertical et disposé entre les points d'articulation (18) de chaque ciseau (17).
2. Echelle pliante selon la revendication 1 comportant un lien de sécurité reliant la branche franchissable à la branche d'appui à l'état déplié, caractérisé en ce que la ou les paires de ciseaux (15) sont agencées immédiatement en dessous du lien de sécurité (9).
3. Echelle pliante selon la revendication 1 caractérisée en ce que les ciseaux (17) sont articulés au montant (4) et au montant d'appui (7) moyennant un jeu angulaire correspondant au moins à la moitié de l'angle d'ouverture de l'échelle pliante dépliée, dans la direction verticale.
4. Echelle pliante selon la revendication 1 caractérisée en ce que les ciseaux (17) et/ou les bras de guidage (20) sont courbés dans leur plan.
EP82110080A 1982-11-02 1982-11-02 Echelle pliante Expired EP0108155B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AT82110080T ATE23599T1 (de) 1982-11-02 1982-11-02 Stehleiter.
EP82110080A EP0108155B1 (fr) 1982-11-02 1982-11-02 Echelle pliante

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP82110080A EP0108155B1 (fr) 1982-11-02 1982-11-02 Echelle pliante

Publications (2)

Publication Number Publication Date
EP0108155A1 EP0108155A1 (fr) 1984-05-16
EP0108155B1 true EP0108155B1 (fr) 1986-11-12

Family

ID=8189316

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82110080A Expired EP0108155B1 (fr) 1982-11-02 1982-11-02 Echelle pliante

Country Status (2)

Country Link
EP (1) EP0108155B1 (fr)
AT (1) ATE23599T1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2207176A (en) * 1987-07-15 1989-01-25 Trevor Perry Support apparatus
CN108528752B (zh) * 2018-06-04 2023-08-18 四川航泰航空装备有限公司 一种通用后舱工作梯

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH90932A (de) * 1921-02-03 1921-10-01 Lino Brunner Sicherung an Bockleitern.
US1942849A (en) * 1933-08-29 1934-01-09 Ned L Thrasher Stepladder brace
US2718346A (en) * 1953-01-26 1955-09-20 Galen Max Ladders
DE3016264C2 (de) * 1980-04-26 1982-10-14 Adam 6101 Modautal Klenk Stehleiter

Also Published As

Publication number Publication date
EP0108155A1 (fr) 1984-05-16
ATE23599T1 (de) 1986-11-15

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