Fire escape – ladder – or scaffold – Scaffold supported internally on shaft
Patent
1994-09-15
1997-03-25
Chin-Shue, Alvin C.
Fire escape, ladder, or scaffold
Scaffold supported internally on shaft
182179, E04G 302
Patent
active
056135734
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to scaffolding, more particularly adapted to be used within hollow elements of large dimensions such as tanks, quarries, et cetera. The scaffolding, according to the invention, is applicable more particularly to positioning insulating material within methane tanks.
Conventional scaffolding adapted to be used within hollow elements have generally a large number of members because they subdivide the hollow volume, which gives rise to high fabrication costs and long erection times at the same time hindering access and free movement behind the hollow element to be able to work there if necessary.
Such scaffolding is for example described in U.S. Pat. No. 4,057,943. In such scaffolding, a bearing member which is generally very heavy supports vertical and horizontal elements which subdivide the volume. As a result, the horizontal elements can come to bear against vertical elements. Only a small portion of the mounting assembly can if desired be mounted in cantilever fashion.
The object of the present invention is therefore to propose a modular scaffolding which permits a large number of manipulations with complete safety and repetitiveness while permitting benefitting from large regions for storage and the preparation of the materials before they are used, while taking up very limited space at the bottom of the element being worked on.
The invention thus relates to scaffolding particularly for working within hollow elements of large dimensions such as tanks, quarries, et cetera, characterized in that it comprises a load bearing structure formed of two struts interconnected by means of two cross pieces forming flooring and rigidifying the assembly, modular platforms mounted at variable heights in cantilever fashion on the external surface of said struts and means for access to said platforms disposed in or adjacent the struts.
According to a preferred embodiment of the invention, the modular platforms have at their end opposite that which is secured to the strut, a telescopic portion and struts of the load bearing structure are each provided with at least two lines of post feet disposed parallel to the longitudinal axis of the scaffolding, such post feet being adjustable in height so as to permit the temporary raising of at least one line of post feet per strut.
In this preferred embodiment of the invention, it is also possible, particularly in the case of use of the scaffolding for positioning insulation within tanks, to adapt perfectly the scaffolding to the shape of the wall in the case of monolayer or multilayer insulation and permitting, thanks to the raisable footings, to be able to work at the bottom of the tank, even in the presence of the scaffolding.
Other characteristics and advantages of the invention will become apparent from a reading of the description which follows and the accompanying drawing's, which description and drawings are given only by way of example. In these drawings:
FIG. 1 is a cross sectional view of scaffolding according to an embodiment of the invention;
FIG. 2 is a simplified schematic view of the lines of post feet of the struts of the load bearing framework of the scaffolding of FIG. 1;
FIG. 3 shows a series of schematic views providing an example of the modularity of the flooring of the telescopic portions of the platforms of the scaffolding of FIGS. 1 and 2;
FIG. 4 is a perspective view of the scaffolding of FIGS. 1 to 3; and
FIG. 5 is a view from above of a platform stage without flooring showing again the modularity of the flooring of the telescopic portions of the platforms of the scaffolding of FIGS. 1 and 2.
According to FIG. 1, the scaffolding according to the present invention comprises a load bearing structure formed of two struts or trusses 3, interconnected by at least two cross members 4, 5 forming flooring and rigidifying the assembly. The struts 3 are constituted of a metallic skeleton in the form of a network, so as to permit easy mounting and unmounting of the assembly, while permitting good access to the interior of the structure o
REFERENCES:
patent: 3910379 (1975-10-01), Miller
patent: 4057943 (1977-11-01), Lienhard
Chin-Shue Alvin C.
Etablissements Duarib, S.A.
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