Supports: cabinet structure – Knockdown or setup type – Skeletal frame
Patent
1997-06-17
2000-02-29
Wilkens, Janet M.
Supports: cabinet structure
Knockdown or setup type
Skeletal frame
211 26, 211189, 403218, 3122653, A47B 4700
Patent
active
060300639
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
This invention relates to a switchgear cabinet with a rack assembled with frame legs and corner connectors, and an open bottom that can be closed by one or several sheet metal bottom pieces.
In a switchgear cabinet of this type the application of the sheet metal bottom pieces must also be performed so that when the switchgear cabinet is erected, they can be applied and again removed from its interior. Thus the outlay for fastening plays an essential role. With known switchgear cabinets this outlay is considerable in most cases.
SUMMARY OF THE INVENTION
It is one object of this invention to provide a switchgear cabinet of the type previously mentioned, wherein the attachment and the removal of sheet metal bottom pieces is possible with little outlay and in a simple manner from the interior of the switchgear cabinet.
In accordance with this invention such object is achieved with the frame legs used as lower depth struts which are covered from below by cover elements, which are essentially U-shaped and which have lateral legs. The cover elements are connected with the depth struts and/or the corner connectors. The depth struts are beveled in an area of their outer edges and form a receiver for the outer lateral legs of the cover elements. The inner lateral legs of the cover elements have support flanges for the sheet metal bottom pieces which face a direction toward the corresponding depth struts. The sheet metal bottom pieces can be connected with the support flanges of the inner lateral legs of the cover elements using U-shaped clamp elements with attachment screws.
The U-shaped cover elements are connected with the lower depth struts of the rack, wherein the outer lateral legs are inserted in receivers of the depth struts and, together with the lateral walls, complete the exterior contours of the switching cabinet. The inner lateral legs with the support flanges, together with the front and rear lower frame legs of the rack, delimit the opening in the bottom area of the switchgear cabinet, which can be easily closed off with one or several aligned sheet metal bottom pieces. The edge areas of the sheet metal bottom pieces are connected with the support flanges. This can be done in a simple manner by using clamping elements provided with attachment screws. In the process the clamping elements enclose the sides of the sheet metal bottom piece and of the support flange facing away from each other.
The width of the sheet metal bottom pieces is matched to the exterior distance between the oppositely oriented support flanges of the two cover elements which cover the lower depth struts.
In accordance with one embodiment the cover elements can be connected with the rack because in the area of their corners facing the corner connectors, the cover elements are chamfered and the outer lateral legs are correspondingly shortened. The cover elements together with set back contact surfaces of the corner connectors are connected flush with the lateral walls and the exterior surfaces of the corner connectors.
If the sheet metal bottom pieces rest against vertical profiled sides of the front and rear frame legs of the rack, the entire opening is closed.
A tight closure of the opening is achieved with first sealing elements arranged between the sheet metal bottom pieces and the support flanges of the inner lateral legs of the cover elements. The edges of the sheet metal bottom pieces facing the profiled sides of the front and rear frame legs of the rack have sealing elements.
If several sheet metal bottom pieces are used, the partition gaps between adjoining sheet metal bottom pieces are sealed by second sealing elements.
BRIEF DESCRIPTION OF THE DRAWINGS
This invention will be described in detail by means of an exemplary embodiment represented in the drawings, wherein:
FIG. 1 is a sectional partial perspective view of a switchgear cabinet frame, according to one preferred embodiment of this invention;
FIG. 2 is an enlarged cross-sectional side view of a portion of the switchgear cabinet fra
REFERENCES:
patent: 2058263 (1936-10-01), Rosendale
patent: 3919603 (1975-11-01), Salvati et al.
patent: 5250752 (1993-10-01), Cutright
patent: 5422436 (1995-06-01), Zachrai
Rittal--Werk Rudolf Loh GmbH & Co. KG
Wilkens Janet M.
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