EP0574109B1 - Echafaudage - Google Patents

Echafaudage Download PDF

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Publication number
EP0574109B1
EP0574109B1 EP19930300669 EP93300669A EP0574109B1 EP 0574109 B1 EP0574109 B1 EP 0574109B1 EP 19930300669 EP19930300669 EP 19930300669 EP 93300669 A EP93300669 A EP 93300669A EP 0574109 B1 EP0574109 B1 EP 0574109B1
Authority
EP
European Patent Office
Prior art keywords
section
leg
engagement member
crimpings
main leg
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
EP19930300669
Other languages
German (de)
English (en)
Other versions
EP0574109A1 (fr
Inventor
Timothy John Griffiths
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.)
LEADA ACROW LIMITED (REG. N 891748)
Original Assignee
LEADA ACROW Ltd (Reg n 2766044)
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 LEADA ACROW Ltd (Reg n 2766044) filed Critical LEADA ACROW Ltd (Reg n 2766044)
Publication of EP0574109A1 publication Critical patent/EP0574109A1/fr
Application granted granted Critical
Publication of EP0574109B1 publication Critical patent/EP0574109B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • E04G25/00—Shores or struts; Chocks
    • E04G25/04—Shores or struts; Chocks telescopic
    • 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
    • E04G1/18—Scaffolds primarily resting on the ground adjustable in height

Definitions

  • This invention relates to scaffolding systems.
  • Scaffolding systems generally consist of interconnected horizontal and vertical members.
  • the horizontal and vertical members may both be in the same form, e.g. tubular members, or the horizontal members can take the form of a space frame comprising two horizontal chord members interconnected and spaced by bracing members.
  • Scaffolding systems have a multiplicity of uses, a particularly common one of which is to support beams, the beams being used, for example, as a work platform or as a base for the production of concrete slabs during the construction of buildings.
  • the vertical leg members of such scaffolding systems are often adjustable in length to allow variable height structures to be formed. This adjustability is commonly achieved by forming the leg in two parts, one of which is telescopically received within the other, and providing both parts with holes whereby they may be pinned together in any one of a number of desired relative positions.
  • DE-OS-2235304 describes a building support with two sections, one of which is receivable in the other, the two being relatively secured by a threaded connection.
  • the outer section includes a plurality of sets of inwards ribs, alternate sets being offset from each other.
  • the inner section includes a set of outward ribs and is insertable in the outer by a series of rotary and axial movements to allow the inner section ribs to move past the outer section ribs.
  • An adjustable length leg for a scaffolding system comprises a main leg section and an extension section, the sections being tubular and having diameters such that the extension section is telescopically receivable within the main leg section, and means for fixing the two sections in at least one relative position when telescopically engaged, wherein at least one engagement member is provided on each section, characterised in that the engagement member(s) of the main leg section forms a first friction fit with the extension section and the engagement member(s) of the extension section forms a second friction fit with the main leg section when the sections are telescopically engaged and in that the first and second friction fits are positioned, longitudinally, on either side of the fixing means.
  • the friction fits are suitably formed at both ends of the overlapping portions of the sections.
  • the extension section is provided with at least one engagement member at the end thereof which is telescopically received in the main leg section.
  • the main leg section is provided with at least one engagement member at both ends thereof so that the extension section can be inserted thereinto from either end.
  • the engagement member of the main leg section comprises a reduced diameter region whilst the engagement member of the extension section comprises an enlarged diameter region.
  • the engagement member suitably comprises a number of equi-angularly spaced crimpings formed in respectively the main leg section and the extension section, the crimpings in the former being inwards and in the latter being outwards.
  • the fixing means may comprise holes in both the main leg section and the extension section whereby the two may be pinned together. These are positioned so that they will be aligned when the crimpings are aligned. Therefore to erect the leg, the extension section will be inserted into the main leg section and rotated, by 120°, in the case of three crimpings, or by 90°, in the case of four crimpings, to align the crimpings. The two sections will then be pinned together.
  • the main leg section is suitably provided with sockets to allow attachment of one or more horizontal members thereto and/or one or more bracing members.
  • the main leg section 2 and extension section 4, shown respectively in Figures 1 and 2, are both tubular in form. The diameters thereof are such that the extension section 4 is telescopically receivable in the main leg section 2 from either end thereof.
  • the ends of the main leg section 2 are each provided with two apertures 6 whereby it may be pinned to the extension section 4 through corresponding apertures 8 provided therein by way of, for example, a U-clip.
  • a plurality of apertures 8 are provided in the extension section 4 whereby a leg formed from it and the main leg section 2 can be set at one of a number of different lengths.
  • the main leg section 2 additionally has a number of sockets 10 welded, see 12, thereto.
  • sockets 10 welded, see 12, thereto.
  • two sets of sockets 10 are provided, each set consisting of four equi-angularly spaced sockets 10.
  • This particular arrangement allows a space frame, consisting of two chords interconnected and spaced by bracing members, to be attached at the end of each of its chords to the main leg section 2.
  • more than two sets of sockets could be provided and that these could be such as to allow attachment of a horizontal tubular member to the main leg section 2 or attachment of a diagonal bracing member thereto.
  • the main leg section 2 has attached thereto by welding, see 14, a ring 16.
  • a ring 16 Located above the ring 16, the end of the main leg section 2 is formed with three inward crimpings 18. These are equi-angularly spaced around the leg section 2.
  • the extension section 4 has a ring 20 at one end thereof. At the other end thereof, as shown in Figures 5 and 6, it is provided with three equi-angularly spaced outward crimpings 22.
  • the inward crimpings 18 of leg section 2 define sections of a circle with diameter C.
  • the outward crimpings 22 of the extension section 4 define sections of a circle with diameter D.
  • Diameter C is arranged to be equal to the outer diameter of the extension section 4, whilst diameter D is arranged to be equal to the inner diameter of main leg section 2. Therefore when extension section 4 is inserted in main leg section 2, a friction fit will be formed at either end of the region of overlap between, firstly, the inward crimpings 18 and the outer face of the extension section 4 and, secondly, the outward crimpings 22 and the inner face of the main leg section 2.
  • the crimpings 18 and 22 can be readily produced without adding to the cost of production of the leg formed from the two sections 2 and 4. Furthermore it is easy to so size the crimpings 18 and 22 as to ensure a good friction fit between these and the relevant section 2 or 4.
  • the apertures 6 and 8 and crimpings 18 and 22 are arranged so that when one is aligned, so is the other.
  • the points of contact between the crimpings 18 and 22 and the outer face of the extension section 4 and inner face of the main leg section 2 will be in line.
  • the extension section 4 is fed into the main leg section 2 with the crimpings 18 and 22 out of alignment and then rotated by 120° to bring them into alignment.
  • leg sections 2 and 4 are illustrated here as having three crimpings, it will be appreciated that other numbers of crimpings could be employed.
  • a particularly preferred alternative is to provide four crimpings, and in this case, the extension section 4, after insertion into the main section 2, will be rotated by 90°.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)

Claims (12)

  1. Montant de longueur ajustable dans un système d'échafaudage comprenant un montant de section principale (2) et une extension (4) de cette section, les sections (2, 4) étant tubulaires et ayant des diamètres tels que l'extension (4) est susceptible d'être introduite d'une manière télescopique dans la section principale (2), et des moyens (6, 8) pour solidariser les deux sections dans au moins une position quand elles sont engagées de cette manière télescopique l'une dans l'autre, un segment de prise (18, 22) au moins étant prévu sur chaque section (2, 4), caractérisé en ce que le(s) segment(s) de prise (18) de la section principale (2) assure(nt) une première insertion par friction avec son extension (4) et le(s) segment(s) de prise (22) de l'extension (4) assure(nt) une deuxième insertion par friction avec le principal montant (2) quand les sections (2, 4) sont engagées l'une dans l'autre d'une manière télescopique et quand les première et deuxième insertions par friction sont en position longitudinale de chaque côté des moyens de fixation (6, 8).
  2. Montant selon la revendication 1, dans lequel les première et deuxième insertions par friction sont placées respectivement à chacune des extrémités opposées à l'endroit du chevauchement télescopique.
  3. Montant selon les revendications 1 et 2, dans lequel la section principale (2) est pourvue d'au moins un segment de prise (18) à ses deux extrémités.
  4. Montant selon n'importe laquelle des revendications précédentes dans lequel la section (4) est pourvue d'au moins un segment de prise (22) à celle de ses extrémités qui s'introduit d'une façon télescopique dans la section principale (2).
  5. Montant selon n'importe laquelle des revendications précédentes, dans lequel le(s) segment(s) de prise de la section principale (2) comporte(nt) une zone de diamètre réduit.
  6. Montant selon n'importe laquelle des revendications précédentes, dans lequel le ou les segment(s) de prise (22) de l'extension (4) comporte(nt) une zone de diamètre élargi.
  7. Montant selon n'importe laquelle des revendications précédentes, dans lequel chaque segment de prise (18, 22) comporte sur les sections (2, 4) des vrillages régulièrement espacés.
  8. Montant selon la revendication 7, dans lequel les vrillages (18) de la section principale (2) sont dirigés vers l'intérieur et les vrillages (22) de la section (4) sont dirigés vers l'extérieur.
  9. Montant selon les revendications 7 et 8, dans lequel chaque segment de prise (18, 22) comporte trois vrillages.
  10. Montant selon les revendications 7 et 8, dans lequel chaque segment de prise (18, 22) comporte quatre vrillages.
  11. Montant selon n'importe laquelle des revendications précédentes, dans lequel les moyens de fixation (6, 8) comportent des trous ménagés à la fois dans la section principale (2) et dans son extension (4) et une cheville à introduire dans les trous de manière que les sections (2, 4) puissent être solidarisées l'une avec l'autre.
  12. Montant selon la revendication 11, dans la mesure où elle dépend des revendications 7 à 10 dans lequel les trous (6, 8) de la section principale et son extension (2, 4) sont placés de manière à être alignés quand les vrillages (18, 22) des sections (2, 4) sont alignés.
EP19930300669 1992-02-06 1993-01-29 Echafaudage Expired - Lifetime EP0574109B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB929202550A GB9202550D0 (en) 1992-02-06 1992-02-06 Improvements in and relating to scaffolding systems
GB9202550 1992-02-06

Publications (2)

Publication Number Publication Date
EP0574109A1 EP0574109A1 (fr) 1993-12-15
EP0574109B1 true EP0574109B1 (fr) 1996-07-03

Family

ID=10709948

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19930300669 Expired - Lifetime EP0574109B1 (fr) 1992-02-06 1993-01-29 Echafaudage

Country Status (3)

Country Link
EP (1) EP0574109B1 (fr)
DE (1) DE69303432T2 (fr)
GB (1) GB9202550D0 (fr)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2235304A1 (de) * 1972-07-19 1974-02-07 Guenther Doll Baustuetze

Also Published As

Publication number Publication date
EP0574109A1 (fr) 1993-12-15
DE69303432T2 (de) 1997-01-02
GB9202550D0 (en) 1992-03-25
DE69303432D1 (de) 1996-08-08

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