Supports: cabinet structure – For particular electrical device or component
Patent
1999-05-17
2000-11-14
Cuomo, Peter M.
Supports: cabinet structure
For particular electrical device or component
361605, 3122656, A47B 8106
Patent
active
061459437
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a switchgear cabinet, which can be closed by wall elements and a cabinet door, wherein an assembly plate is arranged parallel with a vertical lateral wall, and which can be displaced on at least one guide rail in the direction toward the associated lateral wall using sliders and can be brought into a mounting position.
2. Description of Prior Art
Such a switchgear cabinet is known, for example, from German Patent Reference DE 41 40 072 A1. Such switchgear cabinets have a rack which is assembled from vertical and horizontal frame legs. The two lower horizontal frame legs, which extend in the direction of the depth of the switchgear cabinet, are formed by a multi-beveled sheet metal blank. In the open hollow profile produced in this manner, a strip with a longitudinal edge is created, on which the slider is placed with a slit-shaped receiver. Thus the assembly plate can be displaced on its sliders in the direction toward the lateral wall, for example the rear wall located opposite the cabinet door, until it reaches a mounting position.
The strips with the longitudinal edges are sometimes considered to be interfering, since for certain installations they make the attachment on the horizontal frame legs more difficult. A similar assembly plate fastening is also known from German Patent Reference DE 43 12 487.
SUMMARY OF THE INVENTION
It is one object of this invention to create a switchgear cabinet of the type mentioned at the outset, with unlimited possibilities for add-ons on the frame legs because of guide rails.
This object of this invention is attained with a guide rail designed as a separate element and releasably fastened on the switchgear cabinet using positioning units. After positioning the assembly plate, the guide rail can be removed from the switchgear cabinet. Thus, the guide rails can be produced as separate structural elements. The guide rails are fixed in place using the positioning units before the assembly plate is inserted into the switchgear cabinet. The assembly plate can subsequently be pushed in and fixed in an intended position. Thereafter the guide rails can be easily removed again from the switchgear cabinet, so that the guide rails do not present an obstacle.
Advantageously, two guide rails are fixed at a distance from each other in the interior of the switchgear cabinet, in order to guide the assembly plate in a manner which is secure against tilting. However, a single or more than two guide rails can also be inserted.
In accordance with an advantageous embodiment of this invention, the positioning units are fixed in place in retainers in the frame legs of a rack. Thus a stationary and direct attachment on the switchgear cabinet is possible. The rack has sufficient strength for supporting equipped, and therefore heavy, assembly plates.
In accordance with a preferred embodiment of this invention, the rack has horizontal and vertical frame legs, wherein the horizontal frame legs form a bottom and a cover frame, and the retainers for the positioning units are formed by rows of fastening retainers, which are cut in the longitudinal direction into the horizontal frame legs. Thus the fastening retainers, which are normally used for the attachment of built-ins, can also be used for the guide rails.
The guide rail can be produced simply and with little costs if the guide rail is formed in the shape of a U-profile by a center section and two legs connected therewith, which are parallel and spaced apart, and if the center section has a sliding section for the slider. Thus, the guide rail is inserted into the switchgear cabinet so that the two strips point downward. The center section then forms a level sliding surface for the slider. A high moment of resistance is created in the guide rail by the two strips. Even very heavy assembly plates can be displaced on the guide rail because of these simple steps.
If two bolts are used per positioning unit, which are provided with a chamfered insertion piece, then assu
REFERENCES:
patent: 4689722 (1987-08-01), Debus et al.
patent: 5333950 (1994-08-01), Zachrai
Reuter Wolfgang
Root Paul
Anderson Jerry A.
Cuomo Peter M.
Rittal--Werk Rudolf Loh GmbH & Co. KG
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