Fire escape – ladder – or scaffold – Horizontal traversing - actuation – control – or response – Holding means
Patent
1996-12-30
1998-10-13
Chin-Shue, Alvin C.
Fire escape, ladder, or scaffold
Horizontal traversing - actuation, control, or response
Holding means
2807631, E04G 500
Patent
active
058198725
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to a mobile scaffolding out of premanufactured structural components essentially comprised of vertical frames assembled out of posts, horizontal, rectangular platforms which can be mounted on crossbars into the frame and can be equipped with openings and defining longitudinal and/or traverse side pieces, which crossbars can, if necessary, also be used as ladder rungs, diagonal longitudinal and/or transverse reinforcements, railing and/or inbetween spars fastened to the posts and extending longitudinally and/or transversely, and rollers for facilitating movement of the scaffolding mounted in pairs on beam-shaped cross-traverses, the distance between the rollers being preferably changable.
BACKGROUND OF THE INVENTION
Scaffoldings of this type have been known for a long time and have proven to be successful because setting up a stationary scaffolding on buildings is in many cases not necessary and is also significantly more expensive. Of course, some special considerations must be given to the construction of mobile scaffoldings of this type.
It is obvious that particular attention must be paid to an easy transport and good stability during use, and pertinent instructions assure that the necessary rigidity of the respective scaffolding is secure and the platforms are safely accessible and can be walked on. Precise instructions are issued for the rollers regarding their stopping ability.
To operate a mobile scaffolding creates considerable problems when the construction operations to be carried out with it requires different scaffolding widths or if work is supposed to be done at different distances from the building on which the work is to be done. On the one hand, several scaffoldings with different widths must then be available because very wide scaffoldings as a rule because of their requirement for larger space are then not desirous when a shorter scaffolding width is sufficient, and, on the other hand, the entire scaffolding including its "undercarriage" must be moved transversely with respect to the normal, longitudinally directed transport direction, which as a rule is to be avoided even when it is demanded that the rollers be provided with swivel-joint brakes.
Therefore, the basic purpose of the invention is to provide a mobile scaffolding of the type identified in detail above with simple means so that the scaffolding width can be easily varied and moreover also the distance of the scaffolding from the building, on which work is to be done, can be changed with few manipulations without requiring a transverse movement.
SUMMARY OF THE INVENTION
The purpose is attained according to the invention by the cross-traverses being constructed continuously, at least, however, in an edge area at its two front ends as a preferably rectangular hollow-section piece in cross section, by the rollers being mounted on preferably rectangular beam pieces, which can be axially guided into the hollow-section pieces of the cross-traverses and can there be supported fixedly against rotation, by one of the beam pieces being fastened rigidly to each cross-traverse, whereas the other beam piece being fastened axially movably in the associated hollow-section piece, and finally by the frames being provided each in the area of the cross-traverse at the point of a transversely extending railing or inbetween spar otherwise possibly provided there at the same length with a crossbeam, which is constructed in each case continuous in cross section as a--preferably rectangular--hollow section, and is arranged axially movable and fixed against rotation on the associated cross-traverse.
Such an arrangement allows the frames on the same cross-traverse can be exchanged, to do so one must merely remove the movable beam piece from the cross-traverse and subsequently mount it again. The entire construction of the cross-traverse and the beam piece fastened thereon including the rollers and their mounting continue to be joined together unchanged. If the cross-traverse is thereby longer than the
REFERENCES:
patent: 4302023 (1981-11-01), Kiesl
patent: 4967733 (1990-11-01), Rousseau
patent: 5022490 (1991-06-01), Wyse
patent: 5152371 (1992-10-01), Wyse
Chin-Shue Alvin C.
Krause-Werk GmbH & Co. KG
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