Fire escape – ladder – or scaffold – Self-sustaining – Connector for horizontal or diagonal brace
Patent
1997-03-20
1998-10-20
Chin-Shue, Alvin C.
Fire escape, ladder, or scaffold
Self-sustaining
Connector for horizontal or diagonal brace
182119, E04G 700
Patent
active
058232923
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to a clamp connector for the assembly of prefabricated structural elements manufactured out of shaped-section bars to form a scaffolding. Such a scaffolding has, as a rule, lateral frame elements on two vertical posts and horizontal crossbars connecting the posts, with the shaped-section bars being fastened essentially to said crossbars or, auxiliarily, also to short brackets with the same or similar cross section, which brackets are fastened to the posts, whereby the shaped-section bars can already be assembled into one structural group and their longitudinal axes stand on the longitudinal axes of the cross bars or brackets, and, furthermore, whereby the shaped-section bars can be placed with their end areas, which are used for the connection to the crossbars or brackets, inclined or vertically from above onto the crossbars or brackets.
BACKGROUND OF THE INVENTION
Clamp connectors of this type are extensively needed in the building of scaffolding in order to be able to safely and quickly repeatedly connect and disconnect the frame elements, platforms, spars, reinforcements and other structural elements, in particular for scaffolding consisting of prefabricated structural elements.
Whereas the shapes of the structural element to be connected can be manufactured essentially as desired at the connecting point for the clamp connector, and merely its safe fastening must be guaranteed, the crossbars and brackets are designed with a continuously constant cross section adapted to the clamp connector.
The purpose of the invention is to design such clamp connectors in such a manner that they consist of only a few structural parts, which can be fabricated inexpensively in large numbers via a highly efficient process, in particular via an extrusion process, and that high-load supporting welding seams are not needed.
SUMMARY OF THE INVENTION
The purpose is attained according to the invention in such a manner that in the end areas of the shaped-section bars there is provided an aperture receiving the crossbars or the brackets, the axis of symmetry of the aperture is directed transversely with respect to the longitudinal axis of the shaped-section bars, and the aperture is open by a slot on the underside of the associated shaped-section bar so that it can be moved over the associated crossbar or the bracket. Furthermore, the aperture is dimensioned such that the shaped-section bar rests with its longitudinal axis nonmovably on the crossbar or the bracket, and finally clamps, which can be moved at least partially parallel to the longitudinal axis of the respective shaped-section bar and can be locked in place, are provided on the end areas of the shaped-section bars. The clamps in a closed position cover the slot of the respective aperture to clamp the crossbar or the bracket in the aperture of the shaped-section bar.
Such a clamp connector requires only very few additional connecting elements and does not require any supportive welding connections. The positive connection of the respective structural element to a crossbar or a bracket is thereby secured by the frictional lock created by the clamping of the clamp in the position specified by the positive lock, which frictional lock can be carried out with little operating force, so that a secure clamp connection can be achieved.
It is sufficient when at least two of the apertures are provided on the shaped-section bars and can be locked with clamps on each individual structural element. For example, the apertures can therefore remain unlocked on the intermediate spars of a railing provided on the scaffolding when they form a solid railing frame with the railing spars of said railing and the railing spars are already equipped with clamp connectors of the invention.
The area of the wall of the recess, which area rests on the crossbar or the bracket, is best shaped in such a manner that it rests approximately with a flat continuous contact on the crossbar or the bracket, because the surface pressure is then small and defor
REFERENCES:
patent: 2308831 (1943-01-01), Roney et al.
patent: 4030612 (1977-06-01), Gray
Chin-Shue Alvin C.
Krause-Werk GmbH & Co. KG
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