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EP1762694A3 - Metal ladder and method of manufacture thereof - Google Patents

Metal ladder and method of manufacture thereof Download PDF

Info

Publication number
EP1762694A3
EP1762694A3 EP06291438A EP06291438A EP1762694A3 EP 1762694 A3 EP1762694 A3 EP 1762694A3 EP 06291438 A EP06291438 A EP 06291438A EP 06291438 A EP06291438 A EP 06291438A EP 1762694 A3 EP1762694 A3 EP 1762694A3
Authority
EP
European Patent Office
Prior art keywords
manufacture
metal ladder
central portion
external dimensions
central
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.)
Granted
Application number
EP06291438A
Other languages
German (de)
French (fr)
Other versions
EP1762694B1 (en
EP1762694A2 (en
Inventor
Patrick Lachant
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.)
CDH Group SAS
Original Assignee
Centaure 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 Centaure SA filed Critical Centaure SA
Publication of EP1762694A2 publication Critical patent/EP1762694A2/en
Publication of EP1762694A3 publication Critical patent/EP1762694A3/en
Application granted granted Critical
Publication of EP1762694B1 publication Critical patent/EP1762694B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/06—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes in openings, e.g. rolling-in
    • B21D39/063—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes in openings, e.g. rolling-in for assembling ladders
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C7/00—Component parts, supporting parts, or accessories
    • E06C7/08—Special construction of longitudinal members, or rungs or other treads
    • E06C7/082—Connections between rungs or treads and longitudinal members
    • E06C7/085—Connections between rungs or treads and longitudinal members achieved by deforming the rung or the stile

Landscapes

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

Abstract

Echelle métallique, comprenant au moins un échelon (4) et deux montants (2, 3), cet échelon (4) étant pourvu d'une partie centrale et de deux parties extrêmes, au moins une des deux parties extrêmes ayant, lorsque vue en coupe transversale, des dimensions externes différentes des dimensions externes de la partie centrale, mesurées également en coupe transversale, caractérisée en ce que ladite partie extrême est de forme géométrique sensiblement réduite dans un rapport homothétique à celle de la partie centrale, une zone de raccordement étant définie entre la partie centrale et ladite partie extrême, cette zone de raccordement reproduisant la géométrie de l'intersection entre la partie centrale de l'échelon et au moins un montant.

Figure imgaf001
Metal ladder, comprising at least one step (4) and two uprights (2, 3), this step (4) being provided with a central portion and two end portions, at least one of the two end portions having, when viewed in transverse section, external dimensions different from the external dimensions of the central part, also measured in cross section, characterized in that said end portion is of substantially reduced geometrical shape in a ratio homothetic to that of the central part, a connection zone being defined between the central portion and said end portion, this connection area reproducing the geometry of the intersection between the central portion of the step and at least one amount.
Figure imgaf001
EP20060291438 2005-09-13 2006-09-12 Metal ladder and method of manufacture thereof Active EP1762694B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0509346A FR2890682B1 (en) 2005-09-13 2005-09-13 METAL SCALE AND METHOD OF MANUFACTURING SUCH SCALE

Publications (3)

Publication Number Publication Date
EP1762694A2 EP1762694A2 (en) 2007-03-14
EP1762694A3 true EP1762694A3 (en) 2010-01-20
EP1762694B1 EP1762694B1 (en) 2013-05-01

Family

ID=36579291

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20060291438 Active EP1762694B1 (en) 2005-09-13 2006-09-12 Metal ladder and method of manufacture thereof

Country Status (3)

Country Link
EP (1) EP1762694B1 (en)
ES (1) ES2422427T3 (en)
FR (1) FR2890682B1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3878570A1 (en) * 2020-03-09 2021-09-15 Nesco Oy Method and apparatus for forming a tubular piece, a tubular piece and a ladder
CN111390037B (en) * 2020-03-25 2021-07-06 翱文狄风电设备制造(上海)有限公司 Thin aluminum alloy ladder stand and connection process between ladder frame and ladder step

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB384935A (en) * 1931-11-05 1932-12-15 Anders Wikstrand Improvements in ladders
US2951550A (en) * 1958-11-05 1960-09-06 Howard B Rich Ladder construction
FR1459966A (en) * 1965-10-12 1966-06-17 Tubesca advanced ladder with tubular bars
US3283402A (en) * 1963-08-23 1966-11-08 White Metal Rolling & Stamping Methods for fabricating lightweight metal ladders
FR2100519A1 (en) * 1971-10-27 1972-03-24 Chevant Claude
WO1995011366A1 (en) * 1993-10-22 1995-04-27 Blue Steel Oy An apparatus for securing a ladder rung to a ladder rail
FR2795127A1 (en) * 1999-06-16 2000-12-22 Tubesca METALLIC SCAFFOLDING LADDER WITH STEPS CRIMPED ON THE UPRIGHTS

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI71391C (en) * 1984-03-13 1986-12-19 Karolon Oy FREQUENCY REQUIREMENT FOR STEAMING SPECIFIC STEEL

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB384935A (en) * 1931-11-05 1932-12-15 Anders Wikstrand Improvements in ladders
US2951550A (en) * 1958-11-05 1960-09-06 Howard B Rich Ladder construction
US3283402A (en) * 1963-08-23 1966-11-08 White Metal Rolling & Stamping Methods for fabricating lightweight metal ladders
FR1459966A (en) * 1965-10-12 1966-06-17 Tubesca advanced ladder with tubular bars
FR2100519A1 (en) * 1971-10-27 1972-03-24 Chevant Claude
WO1995011366A1 (en) * 1993-10-22 1995-04-27 Blue Steel Oy An apparatus for securing a ladder rung to a ladder rail
FR2795127A1 (en) * 1999-06-16 2000-12-22 Tubesca METALLIC SCAFFOLDING LADDER WITH STEPS CRIMPED ON THE UPRIGHTS

Also Published As

Publication number Publication date
EP1762694B1 (en) 2013-05-01
ES2422427T3 (en) 2013-09-11
FR2890682A1 (en) 2007-03-16
EP1762694A2 (en) 2007-03-14
FR2890682B1 (en) 2009-02-20

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