Fire escape – ladder – or scaffold – Horizontal traversing - actuation – control – or response – Holding means
Patent
1996-12-09
1999-01-19
Chin-Shue, Alvin
Fire escape, ladder, or scaffold
Horizontal traversing - actuation, control, or response
Holding means
E04G 120
Patent
active
058604898
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to a travelling scaffolding manufactured out of prefabricated structural parts, essentially comprising vertical frame elements assembled out of posts, horizontal, rectangular platforms defining the outline of the scaffolding, which platforms can be placed onto crossbars in the frame elements, which crossbars can, if necessary, also be used as ladder rungs, and can be equipped with openings and define longitudinal and/or transverse edges, diagonal longitudinal and/or transverse reinforcement, longitudinally and/or transversely extending railing and/or in between spars fastened to the posts, and rollers for moving the scaffolding, which rollers are mounted in pairs on a horizontal beam-shaped slanting traverse belonging to each frame element and provided on the lower end of the frame element, the rollers each being fastened to the free end of a widening traverse, which is fastened along the slanting traverse and can be moved parallel on the same, and the longitudinal axis of which is parallel to the associated one of the slanting traverses, preferably, however, it is in alignment with the same.
BACKGROUND OF THE INVENTION
Scaffoldings of this type are often very high and for setup must have a sufficient stability without which the outer outline dimensions specified by the platform would have to be enlarged beyond the degree of technologically required and permissible for transport. It is therefore a familiar practice, and regulated by pertinent codes, that the stability of the base of the scaffolding is increased by being able to pull the rollers arranged in pairs out of their transport position apart from each other, thus increasing the base area when setting up the scaffolding. The roller, however, cannot be moved additionally in a direction perpendicular to the one specified by the widening traverses. For this purpose, additional extension traverses would have to be inserted and thus the entire arrangement would be significantly more complicated. However, the expansion of the base in the perpendicular direction is actually just as desirable.
SUMMARY OF THE INVENTION
The basic purpose of the invention is therefore to design a travelling scaffolding of the type described above with simple means so that the base can be increased in two horizontal directions perpendicular to one another during the operation compared with the outline permissible and decisive for the transport without requiring significant additional work and expense.
The purpose is attained according to the invention by each slanting traverse having two pieces, which are provided angled with respect to one another, and which in the outline of the scaffolding, on the one hand, are arranged symmetrically to one another and inwardly angled, and, on the other hand, each have one of the widening traverses which can be moved angled outwardly along the longitudinal axis of the respective piece of the slanting traverse.
A separate extension system transverse to an already existing system for widening with the structural input necessary for operation is avoided in this simple structure, nevertheless the purpose is attained to an extent sufficient for such scaffoldings. Depending on the degree the pieces are angled, the base can be more or less extensively enlarged in the one or other direction, thus improving the stability of the scaffolding. The arrangement does not depend on the construction of other participating structural elements and is equally suited for entirely different systems.
The angled pieces can be designed to abut one another or can be connected to one another by at least one further piece of the slanting traverse, which further piece is preferably parallel to the cross bars, and can, for example, be screwed together, jointed by means of an angled plate, or can be welded together, other designs are also possible. Independent of the special design, care must be taken in every case that the connecting points of the pieces are safely constructed. This, however, is in view of the machine e
REFERENCES:
patent: 3516512 (1970-06-01), Kupke
patent: 3752261 (1973-08-01), Bushnell
patent: 4967733 (1990-11-01), Rousseau
patent: 5022490 (1991-06-01), Wyse
Chin-Shue Alvin
Krause-Werk GmbH & Co. KG
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