EP1762694A2 - Metalleiter und deren Herstellungsverfahren - Google Patents

Metalleiter und deren Herstellungsverfahren Download PDF

Info

Publication number: EP1762694A2
Authority: EP; European Patent Office
Prior art keywords: section; ladder; upright; cross; central portion
Prior art date: 2005-09-13
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

English (en)

French (fr)

Other versions

EP1762694A3 (de

EP1762694B1 (de

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.)

2005-09-13

Filing date

2006-09-12

Publication date

2007-03-14

2006-09-12 Application filed by Centaure SA filed Critical Centaure SA

2007-03-14 Publication of EP1762694A2 publication Critical patent/EP1762694A2/de

2010-01-20 Publication of EP1762694A3 publication Critical patent/EP1762694A3/de

2013-05-01 Application granted granted Critical

2013-05-01 Publication of EP1762694B1 publication Critical patent/EP1762694B1/de

Status Active legal-status Critical Current

2026-09-12 Anticipated expiration legal-status Critical

Images

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

Definitions

the invention relates to the rigid assembly of a tubular metal element to a flat metal element.
the present invention finds particular application to the fixing of rungs on rails, for metal ladders.
Metal ladders are here structures with two amounts (the longitudinal members) interconnected by bars (the steps) fixed at predetermined intervals.
metal ladders here refers to structures of the general type above, whose bars serve as degrees for going up or down, these structures being called scales in the common language and can be of several varieties, for example sliding ladder, interlocking ladder, crinoline ladder.
metal ladder here also refers to cable ladders.
metal ladder here also refers scaffolding ladders, that is to say the side scaffolding uprights, these amounts comprising longitudinal members and crosspieces. These lateral amounts allow, if necessary, to go up or down on the scaffolding.
sealing is meant here any temporary building or structure, fixed or movable, facilitating access to works and carrying out work.
the invention more specifically relates to the cold mechanical connection of the ladder ladders ladders scaffolding.
the assembly by screwing the rungs on the spars is long and expensive. There is a risk of accidental or malicious unscrewing.
the stapling of the rungs to the longitudinal members requires at the ends of the rungs tongues, tenons, pins, or the like may be engaged in slots provided for this purpose in the longitudinal members, and then deformed using a tool of crimping.
the document FR-2,478,891 proposes that at least a portion of the rungs protrude through an orifice of longitudinal members, the permanent mounting of the rungs on the longitudinal members being ensured by deformation of the projecting parts of the rungs, by means of a crimping tool.
the document FR-2 300 887 describes the assembly of rungs provided with lugs penetrating in housings or openings formed on the longitudinal members, a hydraulic device then coming, at the right of each rung, to punch a flat in the spar, the edge of the lower tear of this flat abutting against the upper part of the rung.
the document FR-2 709 528 proposes the establishment of blocking parts, by force, to block the rungs in their nesting position.
the process described in the document FR-2 709 528 proves long and expensive.
the rungs are conventionally provided, on their two lateral ends, with at least one restraint coming to engage in the bores of the uprights.
the end of these retreints protrudes on the outer face of the uprights. It is deformed by crimping, or else by rolling, tulip, or stamping.
the simple crimping leads to the deformation of the retreint on the external face of the amount. Double crimping, performed both on the outer face and on the inner face of the upright is naturally stronger than the simple crimping, since it allows clamping on both sides of the wall of the upright.
the dudgeon is conventionally mechanical and comprises a barrel, pebbles or needles and a conical pin.
the conical pin (or dudgeon tail) advances inside the profile forming the rung.
This spindle is rotated by a machine dégeonneuse, electric or pneumatic.
the spindle increases the circumference of the rollers while rotating them.
the rollers thus cause the expansion of the profile forming the rung.
This expansion is performed while the profile forming the rung has been introduced into an opening in the ladder upright. It is thus possible to form beads on the rung, these beads being placed on either side of at least one of the walls of the ladder upright.
the flattening of the lateral ends of the rungs also causes a protuberance between the flattened area and the circular central portion of the rung. This protrusion may interfere or make less secure the assembly of the steps to the amounts.
the random shape of the flattened section of the rungs makes it difficult to control the subsequent play in the link from the rung to the rung.
the document FR 2,795,127 proposes a metal scaffold ladder in which the flattened end of the rung is pulled into the jamb.
the invention aims to solve the technical problems presented before.
the invention relates, in a first aspect, to a metal ladder, comprising at least one step and two uprights, this step being provided with a central portion and two end portions, at least one of the two parts extremes having, when viewed in cross-section, external dimensions different from the external dimensions of the central portion, also measured in cross-section, said end portion being of substantially reduced geometrical shape in a ratio homothetic to that of the central part, a zone of connection being defined between the central part and said end part, this connection area reproducing the geometry of the intersection between the part central level and at least one amount.
the end portions of the rung and the zones of connection of these end portions with the central part of the rung are provided with ridges extending substantially in the direction of slenderness of the rung. These streaks form a non-slip surface. These grooves reinforce the locking of the step in the mounting holes on the uprights.
the step is provided with two planes of symmetry substantially perpendicular to each other and perpendicular to the cross section of the step.
said end portion of the rung has external dimensions smaller than those of said central portion, these dimensions being measured in cross-section of the rung.
connection zone is at least partly wedged in a hole of the upright, on the internal face of the scale, while said end portion of the step protrudes beyond said upright, this projecting part being plastically deformed. by being pressed against the wall of the upright, on the outer face of the ladder.
the end portions of the rungs are provided with internal notches.
the amounts are of circular, oval or polygonal cross section, at least said step being of oval, circular or polygonal section.
the invention relates to a method of mounting a ladder as presented above, at least one step being fitted into a through-hole of a post, the end portion of this step projecting from external face of the amount, the plastic deformation of this projecting portion from pressing the amount against said connection area.
Plastic deformation is ensured by rolling, interlocking, tilting, crimping, for example in the direction of clockwise.
Scale 1 as shown in FIG. 1 comprises, in a manner well known per se, two lateral uprights 2,3 and 4 rungs.
the two uprights 2, 3 are substantially identical and parallel to each other. It is understood, however, that the invention also relates to ladders whose amounts are not shaped, in particular of section, identical, and / or which are not parallel over their entire length. For example, the amounts may be further apart from each other at the base of the ladder, especially to stabilize the ladder.
the steps 4 are substantially equidistant. It is understood however that the invention also relates to the scales are the steps are not equidistant.
the posts 2,3 are of circular cross section. In other embodiments, not shown, these amounts are of polygonal section, for example square, or even oval.
the rungs 4 are, in their part 4a located between the uprights 2, 3 of oblong cross-section and are provided with ridges or notches, as will appear more completely later with reference to FIG. 11.
the uprights 2, 3 and steps 4 may be steel, aluminum or aluminum alloy. They can be derived from profiling or bending / welding or rolling / welding.
the two extreme end portions 5 of the rungs 4 are of smaller cross-section than the cross section of the portion 4a of the rungs 4, as it clearly appears in FIGS. 3 to 5.
connection areas 7 between the central portion 4a of a step 4 and the end portions 5 of this step 4 have a geometry that corresponds to the contact surface intersection between this step 4 and the amounts 2,3.
the echelon 4 as seen in cross section in FIG. 11, is provided with folds or ridges 8. These grooves 8 make it possible in particular to prevent slipping of the user's foot or hand from the ladder. These grooves 8 are corrugations in the thickness of the profile forming the rung, the thickness of this section, measured in cross section of the rung, being substantially constant.
the step 4 is provided with two planes of symmetry, in the embodiment shown, these two planes being substantially perpendicular to each other and perpendicular to the transverse sectional plane of FIG. 11.
the rung When seen in cross section, the rung is of tubular elongated shape, its outer surface being provided with ridges 8, except at its center passing through the axis XX ', where the rung is devoid of streaks over a variable distance.
the connecting zones 7 are provided with ridges 8, as do the lateral end portions 5, as can be seen in FIG. 5.
the amounts 2, 3 are provided with reservation holes 9, these holes passing through the uprights 2, 3 and these holes 9 being of substantially identical geometry to that of the end portions 5 of step 4, but of dimensions slightly greater than those of these end portions 5.
the length L5 of an end portion 5 is a few millimeters larger than the dimension of the upright 2, 3, this dimension being measured in line with the holes 9.
the protruding part, of length E, of the step 4 is then subjected to rolling, forming a collar 10. During this rolling, the collar 10 pushes the upright 2, 3 in B which is applied against the connection area 7.
the connecting zone 7 being provided with the notches or folds 8, the rolling leads to the wedging of the connection zone 7 in the holes 9 of the uprights, eliminating any risk of play between step 4 and upright 2, 3.
the step 4 is blocked by jamming of its connecting zone 7 in the wall of the upright 2, 3, in the internal part of the scale.
the step is at the same time rigidly tight against the amount 2, 3, the collar 10 providing a pressure of the step 4 against the amount 2, 3, external side to the scale.
the assembly of the steps to the uprights can be advantageously practiced simultaneously on both sides of the rungs, for example in the same clockwise direction as indicated by the arrows F of FIG. 8.
the extreme parts 5 of a rung, substantially reduced in a ratio homothetic to the central portion 4a of this echelon, are obtained by creep of the material in the longitudinal direction of the echelon 4 and in the direction of the grooves 8.
the collar 10 can be obtained by rolling and pressure under a bouterollage.
the method which has just been described could be adapted to circular, oval or polygonal section steps, with circular, polygonal or oval shaped uprights.

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

EP20060291438 2005-09-13 2006-09-12 Metalleiter und deren Herstellungsverfahren Active EP1762694B1 (de)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
FR0509346A FR2890682B1 (fr)	2005-09-13	2005-09-13	Echelle metallique et procede de fabrication d'une telle echelle

Publications (3)

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

Family

ID=36579291

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP20060291438 Active EP1762694B1 (de)	2005-09-13	2006-09-12	Metalleiter und deren Herstellungsverfahren

Country Status (3)

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

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP3878570A1 (de) *	2020-03-09	2021-09-15	Nesco Oy	Verfahren und vorrichtung zur formung eines rohrförmigen teils, rohrförmiges teil und leiter
CN111390037B (zh) *	2020-03-25	2021-07-06	翱文狄风电设备制造(上海)有限公司	一种薄型铝合金爬梯及其梯框和梯蹬之间的连接工艺

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 (fr) *	1965-10-12	1966-06-17	Tubesca	échelle perfectionnée à barreaux tubulaires
US3283402A (en) *	1963-08-23	1966-11-08	White Metal Rolling & Stamping	Methods for fabricating lightweight metal ladders
FR2100519A1 (de) *	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 (fr) *	1999-06-16	2000-12-22	Tubesca	Echelle d'echafaudage metallique a echelons sertis sur les montants

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FI71391C (fi) *	1984-03-13	1986-12-19	Karolon Oy	Foerfarande foer framstaellning av staellningar speciellt stegar

2005
- 2005-09-13 FR FR0509346A patent/FR2890682B1/fr active Active
2006
- 2006-09-12 EP EP20060291438 patent/EP1762694B1/de active Active
- 2006-09-12 ES ES06291438T patent/ES2422427T3/es active Active

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 (fr) *	1965-10-12	1966-06-17	Tubesca	échelle perfectionnée à barreaux tubulaires
FR2100519A1 (de) *	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 (fr) *	1999-06-16	2000-12-22	Tubesca	Echelle d'echafaudage metallique a echelons sertis sur les montants

Also Published As

Publication number	Publication date
EP1762694A3 (de)	2010-01-20
EP1762694B1 (de)	2013-05-01
ES2422427T3 (es)	2013-09-11
FR2890682A1 (fr)	2007-03-16
FR2890682B1 (fr)	2009-02-20

Publication	Publication Date	Title
EP0224290A1 (de)	1987-06-03	Bauart einer abdeckbaren Bedachung
EP0878343B1 (de)	2000-07-26	Gleitschiene für Fahrzeugsitze
EP1762694B1 (de)	2013-05-01	Metalleiter und deren Herstellungsverfahren
FR2589182A1 (fr)	1987-04-30	Garde-corps de chantier
WO1987000881A1 (fr)	1987-02-12	Assemblage angulaire de profiles
FR2689549A1 (fr)	1993-10-08	Dispositif de coffrage de plafonds.
FR2510682A1 (fr)	1983-02-04	Assemblage angulaire de profiles par emboitement a rainure et languette et blocage par coin
FR2661208A1 (fr)	1991-10-25	Raccord a clavette pour echafaudage.
EP1686221A2 (de)	2006-08-02	Befestigungsvorrichtung für Gerüstteile
EP2299027B1 (de)	2014-07-02	Gerüststruktur, insbesondere Fassadengerüst
FR2893966A1 (fr)	2007-06-01	Echelle de toit.
FR2785009A1 (fr)	2000-04-28	Dispositif d'assemblage simple et indemontable de poteaux et panneaux
FR2927919A1 (fr)	2009-08-28	Element d'echafaudage et ensemble d'echafaudage comprenant un tel element
EP1700977B1 (de)	2016-01-06	Verriegelungsvorrichtung für Rahmen von Gerüsten und Stütztürmen
EP0283371B1 (de)	1990-10-17	Verbindungsvorrichtung für Querträger und Platten, insbesondere zum Errichten von Zäunen, Trennwänden und Verkleidungen
FR2947849A1 (fr)	2011-01-14	Jambe d'appui ou de stabilisation telescopique et dispositif comprenant une telle jambe
EP1678389B1 (de)	2016-06-08	Selbsttragende stahlschalung mit grosser spannweite
FR2756302A1 (fr)	1998-05-29	Amelioration aux barrieres de securite
FR2690188A1 (fr)	1993-10-22	Planche d'échafaudage métallique.
FR2990225A1 (fr)	2013-11-08	Garde-corps d'extremite et ensemble comprenant une structure de travail et un garde-corps du type precite
FR2817674A1 (fr)	2002-06-07	Fixation d'echelons sur longerons, application de cette fixation aux echelles a cables
FR2940376A1 (fr)	2010-06-25	Dispositif d'assemblage
FR3112156A3 (fr)	2022-01-07	Dispositif, ensemble de parties comprenant ce dispositif et procédé de raccordement d’éléments longitudinaux
EP0616098A1 (de)	1994-09-21	Gerüstbodenelement
BE1022448B1 (fr)	2016-04-06	Dispositif de protection pour toiture a joints debout

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