EP0357525B1 - Escabeau métallique - Google Patents

Escabeau métallique Download PDF

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Publication number
EP0357525B1
EP0357525B1 EP89420310A EP89420310A EP0357525B1 EP 0357525 B1 EP0357525 B1 EP 0357525B1 EP 89420310 A EP89420310 A EP 89420310A EP 89420310 A EP89420310 A EP 89420310A EP 0357525 B1 EP0357525 B1 EP 0357525B1
Authority
EP
European Patent Office
Prior art keywords
upright
notch
tread
question
flanges
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 - Lifetime
Application number
EP89420310A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0357525A1 (fr
Inventor
Denis Ducros
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AT89420310T priority Critical patent/ATE77128T1/de
Publication of EP0357525A1 publication Critical patent/EP0357525A1/fr
Application granted granted Critical
Publication of EP0357525B1 publication Critical patent/EP0357525B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C7/00—Component parts, supporting parts, or accessories
    • E06C7/08—Special construction of longitudinal members, or rungs or other treads
    • E06C7/082—Connections between rungs or treads and longitudinal members
    • E06C7/084—Rungs comprising projecting tabs or flanges

Definitions

  • the present invention relates to a metal stepladder but, here, the term stepladder should not be interpreted in a restrictive manner because the invention also applies to running boards, miller's ladders and any similar device making it possible to go up and down without having to use your hands to keep your balance.
  • the metal stepladder covered by the present invention is of the type in which the uprights supporting the steps are constituted by metal tubular profiles of any cross section and in which the steps are made from an extruded aluminum profile or the like. or in sheet metal folded approximately to the profile of an inverted U, the core of which has, at each end, a notch capable of being engaged on the corresponding upright and the free edges of the wings, parallel to each other, having, with respect to to their core, the same inclination as the uprights relative to the horizontal when the stepladder is in the position of use and are at a distance from each other equal to the width of the aforementioned notch so as to be able to be applied to the front and rear faces of the upright on which this notch is engaged, means being provided for mechanically linking the extrusions to the uprights emitted from the edges of the wings applied against them.
  • each edge of a step wing is fixed to the adjacent wall of the upright by a blind rivet so that each step is fixed to the two uprights by four rivets whose installation requires four drilling and riveting operations.
  • this method of attachment does absolutely nothing to strengthen or improve the rigidity of the assembly.
  • the present invention aims to simplify the fixing of the steps to the uprights while improving the rigidity of the mounting and the mechanical strength of the uprights of the stepladder.
  • the means for fixing each step end to the corresponding upright are constituted by a single connecting member passing right through the two ends of the edges of the wings of the step considered and the two opposite wall portions of the upright and making an angle with the axis of the upright considered different from 90 °.
  • each step end requires only a single drilling operation and only one installation of a connecting member.
  • the latter is a member working in traction, such as a bolt or a rivet, which creates, in each upright and at each step, a transverse compression stress which increases both the rigidity of the assemblies and those of the uprights.
  • the invention relates to a stepladder of the type comprising two tubular uprights 2, articulated with two support legs 3 and supporting steps 4.
  • the tubular uprights 2 are of rectangular cross section and the steps 4 have a cross section substantially in inverted U whose free edges of the wings 4a and 4b, parallel to each other, have, with respect to their core 4c, an inclination of angle A equal to the inclination of the uprights 2 relative to the horizontal and are at a distance from each other D equal to the distance separating the external faces of the front walls 2a and rear 2b of the corresponding amount 2.
  • the core 4c of each step 4 has a notch 5 whose width and length correspond substantially to the cross section of the uprights 2 of the stepladder so as to allow it to be engaged on this amount.
  • the steps 4 are made of folded sheet metal but they could just as easily be cut from an aluminum profile or other similar extruded.
  • each end of a step 4 is fixed by a single connecting member 6 passing right through the edge of the wing 4a, the front wall 2a, the rear wall 2b and the other wing 4b.
  • each step 4 to the two uprights 2 of the step ladder requires only two holes, one for each end of the step 4, and the installation of only two connecting members 6.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ladders (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Inorganic Insulating Materials (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Steps, Ramps, And Handrails (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • Rod-Shaped Construction Members (AREA)
EP89420310A 1988-08-25 1989-08-22 Escabeau métallique Expired - Lifetime EP0357525B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89420310T ATE77128T1 (de) 1988-08-25 1989-08-22 Metallene stehleiter.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8811419A FR2635816B1 (fr) 1988-08-25 1988-08-25 Escabeau metallique
FR8811419 1988-08-25

Publications (2)

Publication Number Publication Date
EP0357525A1 EP0357525A1 (fr) 1990-03-07
EP0357525B1 true EP0357525B1 (fr) 1992-06-10

Family

ID=9369629

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89420310A Expired - Lifetime EP0357525B1 (fr) 1988-08-25 1989-08-22 Escabeau métallique

Country Status (5)

Country Link
EP (1) EP0357525B1 (es)
AT (1) ATE77128T1 (es)
DE (1) DE68901754T2 (es)
ES (1) ES2032674T3 (es)
FR (1) FR2635816B1 (es)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102359345A (zh) * 2011-07-29 2012-02-22 苏州展华纺织有限公司 一种新型人字梯
CN107217979A (zh) * 2017-07-29 2017-09-29 葛滨 一种用于家用电路的维修梯
RU192759U1 (ru) * 2018-06-01 2019-09-30 Догрулар Дыш Тиджарет Аноним Ширкети Лестничная ступенька высокой прочности

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2618427A (en) * 1947-03-27 1952-11-18 Hudmon S Langley Ladder
DE7025208U (de) * 1970-07-04 1970-11-05 Ruschitzka Friedrich Stehleiter insbesondere fuer haushaltszwecke.
US3908795A (en) * 1973-08-15 1975-09-30 Vinyl Fab Ind Safety ladder for above-the-ground swimming pools

Also Published As

Publication number Publication date
FR2635816A1 (fr) 1990-03-02
DE68901754T2 (de) 1993-01-14
EP0357525A1 (fr) 1990-03-07
DE68901754D1 (de) 1992-07-16
ATE77128T1 (de) 1992-06-15
FR2635816B1 (fr) 1994-01-07
ES2032674T3 (es) 1993-02-16

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