Static molds – Mold element – In situ construction engineering or building type
Patent
1990-06-15
1992-04-07
Housel, James C.
Static molds
Mold element
In situ construction engineering or building type
249 44, 249 47, 249135, 249189, E04G 906
Patent
active
051020920
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a section constituting a concrete shuttering form element comprising a smooth coffering surface in the shutterings.
2. History of the Related Art
The forms conventionally used in concrete construction include heavy materials such as metal or an outer framework of steel or aluminium receiving a skin of plywood serving as a coffering surface. These products are generally heavy, difficult to maneuver and of limited duration. Their use necessitates considerable lifting means taking into account their weight and require particular attention in their assembly. Such a use necessitates the employment of expensive equipment as well as highly qualified manpower.
SUMMARY OF THE INVENTION
The present invention aims to propose an assembly of forms including elements which are lightweight, easily transportable, and therefore allow ease of use by non-specialized manpower and avoid having to employ inconvenient lifting means. These forms of novel design are obtained by producing elements in the form of a very light aluminium alloy which is easy to manipulate, the shape of these elements facilitating assembly to constitute a coffering surface which is easy to modulate by both lateral and vertical association of the form elements. The use of aluminium makes it possible to avoid all the problems of corrosion, hence an exceptionally long life of the product. The use of such a material therefore avoids having to use lifting means and allows simple packing when such elements are to be transported, particularly for distant public works sites.
The present invention therefore relates to a concrete form element comprising a smooth coffering surface, characterized in that the section, made by extrusion of an aluminium alloy, comprises longitudinal stiffening fins perpendicular to the coffering surface which define open cavities.
Two fins each located at one lateral end of the coffering face have a C-shaped cross-section open towards the outside of the section.
According to a first embodiment, the form element has an exterior angle made by a longitudinal central folding of the coffering surface.
According to a second embodiment, the form element has an interior angle made by a longitudinal central folding of the coffering surface and cut-out of two central fins.
According to a secondary feature of the invention, the fins comprise longitudinal reinforcements each having means for receiving a fastener acting on an element for connecting two sections.
The present invention is also directed to a form assembly for concrete comprising an association of sections as described hereinabove, characterized in that the form elements are laterally attached by a connecting element engaging in the "C" opening of a lateral fin of a first form element and in the "C" opening of a lateral fin of a second element with the connecting element being locked by members of the first and second form elements.
According to another secondary feature of this form assembly, a C-sectioned receiving element is mounted on the horizontal edges of the form elements by members cooperating with the reinforcements located on each fin.
With the invention an element for connecting two vertically superposed form elements cooperates, on the one hand, with a first receiving element mounted on the upper edge of a first form element and, on the other hand, with a second receiving element mounted on the upper edge of a second section.
According to a preferred mode of assembly, steel walers are fixed transversely on the fins of each form element section.
BRIEF DESCRIPTION OF THE DRAWINGS
A particular embodiment of the invention will now be described in greater detail, which will show more clearly the essential features and advantages, it being understood, however, that this embodiment has been chosen by way of example and that it is in no way limiting. Its description is illustrated by the accompanying drawings, in which:
FIG. 1 is a view in transverse section of a form element of the pres
REFERENCES:
patent: 3124858 (1964-03-01), Blonde
patent: 4643387 (1987-02-01), Bo
patent: 4744541 (1988-05-01), Carlson et al.
patent: 4915345 (1990-04-01), Lehmann
patent: 4957272 (1990-09-01), Lee
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