EP0518794A1 - Zu Leiter unformbahres, zusammenfaltbahres Gerüst - Google Patents

Zu Leiter unformbahres, zusammenfaltbahres Gerüst Download PDF

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Publication number
EP0518794A1
EP0518794A1 EP92440074A EP92440074A EP0518794A1 EP 0518794 A1 EP0518794 A1 EP 0518794A1 EP 92440074 A EP92440074 A EP 92440074A EP 92440074 A EP92440074 A EP 92440074A EP 0518794 A1 EP0518794 A1 EP 0518794A1
Authority
EP
European Patent Office
Prior art keywords
scaffolding
ladders
uprights
scaffolding according
beams
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Withdrawn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
EP92440074A
Other languages
English (en)
French (fr)
Inventor
Bertrand Vuillemenot
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
Publication of EP0518794A1 publication Critical patent/EP0518794A1/de
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G1/00—Scaffolds primarily resting on the ground
    • E04G1/34—Scaffold constructions able to be folded in prismatic or flat parts or able to be turned down
    • 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

Definitions

  • the present invention relates to a scaffolding comprising two vertical ladders held parallel to one another by a horizontal plate, two base beams, at least one spider arm and means for blocking the ladders in a vertical position, the horizontal plate being stiffened by two beams reinforcement.
  • Scaffolding intended for the general public generally consists of three parts including two vertical ladders and a horizontal platform. They are most of the time arranged to be transformable into a developed scale. However, the transformation of these scaffolds requires dismantling, with suitable tools, of various parts such as stiffeners and safety rails, which complicates the intervention of the user and the handling of these scaffolds.
  • the reference GB-A-894 259 describes a scaffolding composed of two rectangular structures and a pivoting ladder mounted between the two structures, by quick-assembly articulation elements. This scaffolding can be folded back on itself and kept in the closed position by a locking system.
  • the two references EP-A-0 276 489 and EP-A-0 348 885 describe a scaffolding with platforms with systems for fixing the platforms to crosspieces allowing these platforms to be blocked.
  • the reference WO-A-8 601 847 relates to a scaffolding with platforms which can be folded back on itself, the platforms being pivoting and mounted on rectangular structures.
  • the locking means described and known are complex mechanical systems requiring a fairly long intervention time for unlocking the hooks and removing the plate. These operations each time requires the use of both hands.
  • the scales intended for the general public are produced with high manufacturing tolerances. The existing mounting clearances then weaken the stability and rigidity of the assembly.
  • the present invention has the advantage of offering high stability whatever the manufacturing tolerances of the ladders by a self-locking system allowing the play to be taken up. It also aims to avoid the drawbacks mentioned above by proposing a scaffolding with a robust and reliable construction, which can be easily and quickly transformed, without tools, into a developed ladder, while guaranteeing safe use.
  • the invention provides a scaffolding of the type indicated in the preamble, characterized in that the locking means comprise said reinforcement beams provided at their ends with flexible end pieces arranged to bear respectively against a rung of each of the two scales .
  • said end pieces are made of deformable synthetic material, and said reinforcing beams may have slightly different lengths.
  • the width of the plate is advantageously equal to the spacing of the uprights of each scale.
  • the two base beams are located at the base of the scaffolding to define the spacing of the two ladders and are articulated at each of their ends on the corresponding uprights.
  • These two base beams are profiles which constitute steps to access the platform.
  • the scaffolding comprises a safety rail articulated at each of its ends on one of the uprights of each of the two scales.
  • the two vertical ladders and the two base beams and the safety rail articulated on the uprights of said ladders form a deformable parallelogram arranged to allow folding of the scaffolding and its transformation into a developed ladder.
  • the ladders comprise, in place of the first rung, a stabilization hoop provided with two support supports whose spacing is greater than the spacing of the two uprights of each ladder.
  • Said stabilization hoop can advantageously be provided with swivel and self-locking casters.
  • the scaffolding comprises two vertical scales 1 and 2, each composed of two uprights 5 connected together by non-slip tubular steps 8.
  • These scales are connected by means of a self-locking horizontal plate 3, stiffened by two reinforcement rails 9 fitted at each of their ends with a flexible end piece 10.
  • These flexible end pieces 10, closing the reinforcement side rails 9, serve as stops for longitudinal support of the horizontal plate 3 embedded between the uprights 5 and a rung 8 of each vertical scale 1 and 2.
  • Said flexible ends 10 can be interchangeable and are made of a deformable synthetic material, thus ensuring a stress on the two rungs 8 supporting the horizontal tray 3.
  • the two reinforcing beams 9 have slightly different lengths, the longest beam being placed on the open side of the scaffolding to increase the stress between the two ladders. This tension stiffens the entire scaffolding and prevents any untimely movement of the self-locking horizontal plate 3.
  • the spacing of the two vertical ladders 1 and 2 is provided at their base by two base rails 4, articulated at each of their ends to the corresponding uprights 5 of each scale 1, 2 by means of threaded pins 13 integral with the base rails 4 and embedded in corresponding cells 12 provided in the uprights 5.
  • Said base beams 4 are provided with non-slip notches and can be used as steps to access the plate 3.
  • a cross arm 7 connecting the two scales 1 and 2 ensures the longitudinal rigidity of the scaffolding.
  • This cross arm 7 is articulated at each of its ends to one of the corresponding uprights 5 of each scale 1, 2 by means of a threaded pin 13 secured to the cross arm 7 passing through a cell 12 provided in the corresponding upright 5 and maintained by a quick-release nut 13 ′ such as for example a wing nut.
  • a safety rail 6 is provided in the upper part and is also articulated at each of its ends to one of the corresponding uprights 5 of each scale 1, 2 in the same way as the cross arm 7. As the name suggests, this heald 6 is intended for the maintenance and security of the user.
  • One of the two vertical ladders is fitted with rollers 11 allowing the user to move the scaffolding by holding it with one hand.
  • one or both vertical scales 1, 2 can be widened at their base, by providing a stabilizing arch 18 in place of the first rung 8, provided with two support supports whose spacing is greater than the spacing of the two uprights of each scale, providing the assembly with very great lateral stability.
  • This arch 18 is provided with non-slip notches allowing the user to place his foot safely and end caps 19 made of synthetic material.
  • Said hoop can be provided with swivel and self-locking casters (not shown).
  • This scaffolding can be transformed into a developed support ladder, by removing the horizontal plate 3 by simple manual pressure from the bottom up, and the cross arm 7 by manually unscrewing the two nuts 13 'with quick tightening. It suffices to bring the two vertical ladders 1 and 2.
  • the two articulated base beams 4 guide the assembly and when the two ladders 1 and 2 are one against the other, one or two flanges 16 fixed on one of the steps 8 of a ladder 1 receives a rung of the ladder 2.
  • the blocking is carried out using a screw 17 arranged to bring the two flanges together with a flange 16.
  • the two ladders 1 and 2 are thus locked in developed position, the rollers 11 being pressed against the front.
  • This scaffolding can be folded so as to occupy a reduced space for its storage or its arrangement, by removing the horizontal plate 3, the retaining pin 13 from one end of the cross arm 7 and the retaining pin 13 d one end of the safety rail 6.
  • the ladder 2 provided with the rollers 11 is folded down on the base beams 4 while the ladder 1 is folded down under said beams 4.
  • the plate 3 is then placed on the folded assembly and everything can be stored or stored in a minimal space.
  • All the main parts making up the scaffolding which is the subject of the present invention do not have a density greater than 2.7 (density of aluminum).
  • the reinforcing beams 9 serving as stiffeners to the horizontal plate 3 have the advantage of stiffening it while reducing its total mass. This weight gain achieved, allows a reduction of the scaffolding of about 30% compared to scaffolding available on the market. This advantage also facilitates the handling and use of this product.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Ladders (AREA)
EP92440074A 1991-06-10 1992-06-09 Zu Leiter unformbahres, zusammenfaltbahres Gerüst Withdrawn EP0518794A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9107198 1991-06-10
FR9107198A FR2677391A1 (fr) 1991-06-10 1991-06-10 Echafaudage pliant transformable en echelle.

Publications (1)

Publication Number Publication Date
EP0518794A1 true EP0518794A1 (de) 1992-12-16

Family

ID=9413780

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92440074A Withdrawn EP0518794A1 (de) 1991-06-10 1992-06-09 Zu Leiter unformbahres, zusammenfaltbahres Gerüst

Country Status (2)

Country Link
EP (1) EP0518794A1 (de)
FR (1) FR2677391A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110454077A (zh) * 2019-09-11 2019-11-15 李鹏飞 一种多功能梯子

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB894259A (en) * 1960-03-09 1962-04-18 Thomas Ltd Martin Improvements in or relating to builders' staging
FR2313546A2 (fr) * 1975-06-06 1976-12-31 Saint Martin Charles Echelle double utilisable comme echafaudage
WO1986001847A1 (en) * 1984-09-20 1986-03-27 John Clement Preston A scaffolding module and method of erecting same
EP0276489A1 (de) * 1987-01-25 1988-08-03 Langer geb. Layher, Ruth Gerüstrahmentafel
EP0348885A2 (de) * 1988-07-01 1990-01-03 Langer, Ruth, geb. Layher Nicht-vertikales Gerüstelement mit Halteeinrichtung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB894259A (en) * 1960-03-09 1962-04-18 Thomas Ltd Martin Improvements in or relating to builders' staging
FR2313546A2 (fr) * 1975-06-06 1976-12-31 Saint Martin Charles Echelle double utilisable comme echafaudage
WO1986001847A1 (en) * 1984-09-20 1986-03-27 John Clement Preston A scaffolding module and method of erecting same
EP0276489A1 (de) * 1987-01-25 1988-08-03 Langer geb. Layher, Ruth Gerüstrahmentafel
EP0348885A2 (de) * 1988-07-01 1990-01-03 Langer, Ruth, geb. Layher Nicht-vertikales Gerüstelement mit Halteeinrichtung

Also Published As

Publication number Publication date
FR2677391A1 (fr) 1992-12-11

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