Fire escape – ladder – or scaffold – Unitary foldable – rigid scaffold or ladder
Patent
1990-03-14
1992-07-07
Machado, Reinaldo P.
Fire escape, ladder, or scaffold
Unitary foldable, rigid scaffold or ladder
182178, 182229, E04G 134
Patent
active
051274922
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to methods and apparatus for scaffolding and more particularly but not exclusively to an improvement in or modification of the scaffolding described in U.S. Pat. No. 4,773,506.
PRIOR ART
Conventional scaffolding has many problems, the most prominent thereof being that they are labour intensive to erect and do not provide a co-ordinated scaffold system adapted to meet the varying requirements particularly of high rise scaffolding.
Described in the above U.S. Pat. No. is a folding scaffold module which is stackable. This also disclosed in U.S. Pat. No. 1,284,078, a collapsible tower. This collapsible tower is not adapted to be stacked and accordingly does not lend itself to industrial type scaffolding. U.S. Pat. No. 3,463,265 discloses a collapsible platform support, but again it is not intended to be stacked and is not integrated with platforms to facilitate easy installation of the scaffolding.
SUMMARY OF THE INVENTION
It is the object of the present invention to overcome or substantially ameliorate the above disadvantages.
Therein disclosed herein a stackable scaffolding module having four elongated verticle support members which are generally parallel and co-extensive;
at least two work platforms adapted to the building materials and bear the weight of workman, which platforms are supported by the support members at vertically spaced locations, said platforms being of generally rectangular or square configuration at;
pivot means attaching each platform to the support members so that each support member is located adjacent a respective one of the corners of each platform and permitting relative pivotting movement between each platform and the support members about 2 parallel axis extending generally parallel to the side of each platform;
releasable securing means for preventing pivotting of the platforms relative to the support members so that the module is foldable between an erect configuration with the platforms normal to the support members when a securing means is engaged and a folded configuration with the support members pivotted relative to the platform so that support members are located adjacent each other when the securing means is released thereby reducing overall space occupied by the module to facilitate storage and transportation of the module.
A preferred form of the present invention will now be described by way of example with reference to the accompanying drawings wherein:
FIG. 1 is a schematic perspective view of a scaffold assembly;
FIG. 2 is a schematic perspective of a portion of scaffold of FIG. 1;
FIG. 3 is a schematic perspective view of a further portion of the scaffold of FIG. 1;
FIG. 4 is a schematic perspective view of a scaffold module employed in the scaffold of FIG. 1;
FIG. 5 is a schematic perspective view of a further module employed in the scaffold of FIG. 1;
FIG. 6 is a schematic perspective view of a stair rail assembly employed in the scaffold of FIG. 1;
FIG. 7 is a schematic perspective view of a base assembly employed as scaffold of FIG. 1;
FIG. 8 is a schematic side elevation of a portion of the base of FIG. 7;
FIG. 9 is a schematic perspective view of a coupling employed in the base of FIG. 7;
FIG. 10 is a schematic part exposed view of the coupling of FIG. 9;
FIG. 11 is a schematic side elevation of a bracket employed in the scaffold of FIG. 1;
FIG. 12 is a schematic top plan view of the bracket of FIG. 11;
FIG. 13 is a schematic side elevation of an extension bracket for the bracket of FIG. 11;
FIG. 14 is a schematic top plan view of the bracket of FIG. 13;
FIG. 15 is a schematic perspective view of a portion of the scaffold of FIG. 1, employing the bracket of FIG. 11;
FIG. 16 is a schematic perspective view of the bracket of FIG. 11;
FIG. 17 is a schematic perspective view of a brace employed in the scaffold of FIG. 1;
FIG. 18 is a schematic perspective view of a brace to anchor this scaffold of FIG. 1 to a building structure;
FIG. 19 is a schematic perspective view of a modification of the brace
REFERENCES:
patent: 3392801 (1968-07-01), Gethmann
patent: 3403751 (1968-10-01), Yoder
patent: 4226192 (1980-10-01), Myers
patent: 4452337 (1984-06-01), Atzinger
patent: 4620608 (1986-11-01), Gilbreath
patent: 4703702 (1987-11-01), Speicher
patent: 4773506 (1988-09-01), Preston
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