EP0574109A1 - Echafaudage - Google Patents

Echafaudage Download PDF

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Publication number
EP0574109A1
EP0574109A1 EP93300669A EP93300669A EP0574109A1 EP 0574109 A1 EP0574109 A1 EP 0574109A1 EP 93300669 A EP93300669 A EP 93300669A EP 93300669 A EP93300669 A EP 93300669A EP 0574109 A1 EP0574109 A1 EP 0574109A1
Authority
EP
European Patent Office
Prior art keywords
section
leg
crimpings
sections
engagement member
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
EP93300669A
Other languages
German (de)
English (en)
Other versions
EP0574109B1 (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.
  • An adjustable length leg for a scaffolding system in accordance with the invention 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 which forms a friction fit with the other section when the two sections are telescopically engaged.
  • 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. Therefore when the two sections are telescopically engaged, a friction fit will be formed at both ends of their overlapping portions. This has been found to be sufficient to significantly increase the structural integrity of a pinned connection between the two. The need for accurately dimensioned sections is obviated and standard sections can be readily employed.
  • 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°.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
EP19930300669 1992-02-06 1993-01-29 Echafaudage Expired - Lifetime EP0574109B1 (fr)

Applications Claiming Priority (2)

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

Publications (2)

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

Citations (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

Patent Citations (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
EP0574109B1 (fr) 1996-07-03
DE69303432D1 (de) 1996-08-08
GB9202550D0 (en) 1992-03-25
DE69303432T2 (de) 1997-01-02

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