EP1795696A2 - Leitergelenk - Google Patents

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Publication number
EP1795696A2
EP1795696A2 EP06398008A EP06398008A EP1795696A2 EP 1795696 A2 EP1795696 A2 EP 1795696A2 EP 06398008 A EP06398008 A EP 06398008A EP 06398008 A EP06398008 A EP 06398008A EP 1795696 A2 EP1795696 A2 EP 1795696A2
Authority
EP
European Patent Office
Prior art keywords
articulation
ladder
ladders
castings
geometric configuration
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Withdrawn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
EP06398008A
Other languages
English (en)
French (fr)
Other versions
EP1795696A3 (de
Inventor
De Almeida Madureira Salemo
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.)
Salemo & Merca Lda
Original Assignee
Salemo & Merca Lda
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 Salemo & Merca Lda filed Critical Salemo & Merca Lda
Publication of EP1795696A2 publication Critical patent/EP1795696A2/de
Publication of EP1795696A3 publication Critical patent/EP1795696A3/de
Withdrawn legal-status Critical Current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
    • E06C1/32—Ladders with a strut which is formed as a ladder and can be secured in line with the ladder
    • 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

Definitions

  • This invention covers an articulation for simple articulated ladders or for extension and telescopic articulated ladders.
  • This type of ladder generally consists of two or more ladder sections joined by one or more articulations, so that a long ladder may be folded, transported or stored in a small space, but also to adapt the ladder to the location and the various work conditions.
  • articulations for these ladders are generally small, in order not to create a long interval between the steps at the fastening spots. Generally, they also have very short arms so that they may be joined and fastened to the ends of the members comprising the ladder flanges, whereby the articulation arms are joined close to the first step. After the joint, a variable number of holes are drilled for the rivets that are placed from the exterior. The rivets cross only the walls that are side by side - the external wall of the ladder side and the inner wall of the articulation arm.
  • the rivets are of a relatively small diameter, and since the lateral member commonly applied for these ladders has a wall of about 1.00 mm, it can be easily seen that the material's resistance to wear and torsion forces is always precarious in this small joint area, and even if the rivet is made of steel, which is rare, the safety of persons using this type of ladder is always minimum. Most users agree that the main problem with these ladders is that they develop loose fittings between the member and the articulation joint arm due to constant use that causes constant oscillation and, in time, loosen the rivet holes or shear them.
  • the common method of fastening the articulation to the member decreases the ladder's resistance, particularly when it is totally open, since, if the user is at the top of the ladder, or on the step next to the articulation, strong pressure is placed on the member area at the end of the articulation, whereby the rivets are the only connection parts that disperse the forces between those two elements.
  • the ladder is used on a regular basis, there is a constant variation in load direction that eventually causes play and wear in that area.
  • This invention resolves the problem of the fastening and resistance of ladder articulations and arises, not only due to a demand for a solution to the problem of safety sought by most users, but also due to the growing demand for larger articulated ladders by professional users.
  • the new articulation's main novelty for ladders is the longer arms that, when totally open, are always longer than the normal distance between the ladder steps.
  • Both articulation arms have castings (1 and 2) of a square, rectangular, triangular or oval geometric shape, but always the same as the member's peripheral configuration (3) used on the ladder steps. These castings make it possible for the articulation arms, after being deeply inserted into the corresponding ladder flanges (6), that is, the arm and the flange, to be simultaneously crossed by the ladder step (3), and then the step is flared outside the flange (4).
  • the controlled flared exterior (4) allows for a perfect adjustment and total consolidation of the respective parts (articulation, flange member and step member):
  • the risk of rupture in that ladder area is eliminated because there are no longer dispersed contact points, which are replaced by a large contact surface dispersing the forces and thus providing greater robustness along the whole ladder length, regardless of its number of articulations or of the length or number of steps of each of its parts, an important user-safety factor.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ladders (AREA)
EP06398008A 2005-07-12 2006-07-11 Leitergelenk Withdrawn EP1795696A3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PT10330705A PT103307B (pt) 2005-07-12 2005-07-12 Articulação para escadas

Publications (2)

Publication Number Publication Date
EP1795696A2 true EP1795696A2 (de) 2007-06-13
EP1795696A3 EP1795696A3 (de) 2010-03-17

Family

ID=37775155

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06398008A Withdrawn EP1795696A3 (de) 2005-07-12 2006-07-11 Leitergelenk

Country Status (2)

Country Link
EP (1) EP1795696A3 (de)
PT (1) PT103307B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU174196U1 (ru) * 2015-04-02 2017-10-06 Общество с ограниченной ответственностью "ЖБИ Конструкции" Опалубка для возведения лестничных конструкций

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8811247U1 (de) * 1988-09-06 1988-11-10 Hailo-Werk Rudolf Loh Gmbh & Co Kg, 6342 Haiger Rastgelenk für eine Mehrzweckleiter
DE4431179A1 (de) * 1993-09-04 1995-04-06 Ryu Hoi Kwan Drehgelenk für eine zusammenklappbare Leiter
EP0822317A2 (de) * 1996-08-01 1998-02-04 IG Corporation Company Ltd. Hochfeste Faltleiter

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8811247U1 (de) * 1988-09-06 1988-11-10 Hailo-Werk Rudolf Loh Gmbh & Co Kg, 6342 Haiger Rastgelenk für eine Mehrzweckleiter
DE4431179A1 (de) * 1993-09-04 1995-04-06 Ryu Hoi Kwan Drehgelenk für eine zusammenklappbare Leiter
EP0822317A2 (de) * 1996-08-01 1998-02-04 IG Corporation Company Ltd. Hochfeste Faltleiter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU174196U1 (ru) * 2015-04-02 2017-10-06 Общество с ограниченной ответственностью "ЖБИ Конструкции" Опалубка для возведения лестничных конструкций

Also Published As

Publication number Publication date
PT103307A (pt) 2007-01-31
EP1795696A3 (de) 2010-03-17
PT103307B (pt) 2007-05-31

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