Supports: cabinet structure – Knockdown or setup type – Skeletal frame
Reexamination Certificate
2000-08-17
2001-10-09
Cuomo, Peter M. (Department: 3636)
Supports: cabinet structure
Knockdown or setup type
Skeletal frame
C312S265100
Reexamination Certificate
active
06299268
ABSTRACT:
BACKGROUND OF THE INVENTION
The invention relates to a metallic framework in the form of a rectangular parallelepipedic frame, in particular for an electrical cabinet, comprising: vertical uprights in the form of pillars assembled to cross-members extending in the depthwise direction of the frame to constitute on the opposite sides two quadrangular sub-frames formed by profiled sections, joining parts arranged at the corners of the frame for inter-connection of the uprights to the cross-members, each joining part being shaped as a bipod comprising a first fitting element arranged at a right angle with a second fitting element, and horizontal girders extending in the widthwise direction of the cabinet to provide the mechanical junction between the two sub-frames.
STATE OF THE TECHNIQUE
The document EP 866,531 filed by the applicant describes a frame of an electrical cabinet in which the girders are fitted onto the uprights by a fixing system with hyper-static corner-pieces.
According to another known frame, tripods are used as joining parts to assemble the uprights, cross-members and girders. Connection of the cables to the cabinet remains difficult as the elements constituting the framework are not able to be disassembled.
OBJECT OF THE INVENTION
The object of the invention is to achieve a frame for an electrical cabinet which is easy to assemble, has a good mechanical strength, and makes for easy connection of the cables. The device according to the invention is characterized in that each joining part is equipped with positioning means in the intermediate common part for fixing of the corresponding girder, said positioning means comprising at least one pair of bearing faces arranged in a V-shape confining a corner-piece with an acute angle into which the girder of conjugate shape fits, and an assembly screw for progressive tightening of the girder onto the corner-piece of the bipod.
According to a preferred embodiment, the corner-piece presents a trapezoid cross section open at the front and closed at the rear by a back face. A tapped hole is arranged in the center of the common part to receive the fixing screw. The fictitious peak of the acute angle of the corner-piece is placed in the alignment of the tapped hole.
According to one feature of the invention, the acute angle of the corner-piece is comprised between 20° and 40°. An optimum contact pressure of the girder on the corner-piece is thus obtained, while at the same time facilitating subsequent disassembly.
According to another feature of the invention, the girder comprises a W-shaped section having at each end a hole for insertion of the fixing screw. A seal can also be fitted between the girder and the common part of each joining part. The girders can be made of aluminium or steel.
REFERENCES:
patent: 5228762 (1993-07-01), Mascrier
patent: 6019446 (2000-02-01), Laboch et al.
patent: 0 866 531 (1998-09-01), None
patent: 1278118 (1961-10-01), None
Carle Pierre
Laboch Kazimir
Pin Jean-Pierre
Cuomo Peter M.
Hansen James O.
Parkhurst & Wendel L.L.P.
Schneider Electric Industries SA
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