Rack for a switching cabinet

Details Rack for a switching cabinet Rack for a switching cabinet

1996-04-10

1998-05-12

Gibson, Jr., Robert W.

Supports: racks

Special article

Electrically powered

211182, 211189, 3122651, A47F 500

Patent

active

057494762

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

1. Field of the Invention
This invention relates to a rack for a switching cabinet made up of frame parts and having fastening holes provided inside of the frame pieces forming internal edges of the rack.
2. Description of Prior Art
A rack of this type is taught by German Patent Publication DE 33 44 598 C1. In accordance with the teachings of this reference the frame pieces themselves have two profile sides with rows of fastening holes. Manufacture of the frame pieces, with insertion of the fastening holes and shaping of the stamped sheet metal blanks, requires several working steps, which result in extremely high production costs. Moreover, all the frame pieces of the rack are provided with rows of fastening holes in order to provide possible attachments at all points in the rack, although in many cases this is not necessary. As the rows of fastening holes are also provided at uniform intervals, frequently special attachment means are necessary for incorporating special devices.


SUMMARY OF THE INVENTION

It is an object of this invention to provide a rack of the type already mentioned, which may be constructed with simpler frame pieces, which may be cost-effectively manufactured, and which may be subsequently adapted to the most varied types of attachment.
These and other objects are achieved in accordance with this invention by a rack comprising frame pieces forming only a support framework, at least a portion of the frame pieces being rigidly or detachably connected or connectable to mounting rails, which extend at least over a portion of the length of the associated frame piece, and, along with profile sides having rows of fastening holes, forming parts of internal edges.
In accordance with one embodiment of this invention, the rack is formed as a simple support framework, for which purpose simple and inexpensively manufactured frame pieces may be used. With the aid of mounting rails, the support framework may be equipped at the necessary points for the incorporation of devices, this also being achievable subsequently. In this case, different sub-divisions are provided in one and the same rack by means of mounting rails with different fastening holes, or alternatively the intervals between the fastening holes may also be again altered subsequently by the incorporation of other mounting rails. The rack so constructed, thus, offers substantially more possible variations than the known rack. Moreover, the support framework in accordance with one embodiment of this invention may also be provided with individual mounting rails.
Attachment of the mounting rails to the frame pieces of the support framework is simplified by the frame pieces each having a receiving means defined by two profile side sections into which the mounting rail may be inserted in such a way that the profile sides provided with the fastening holes form internal sides of the support framework.
In accordance with one embodiment of this invention in which four frame pieces of the support framework in each case are connected to two non-detachable support frameworks, and in which the two support frameworks are detachably connected or connectable in the corner regions by four frame pieces in the form of connecting struts, the rack may be stored and transported in a dismantled state.
The rack may be produced in a particularly cost-effective way where, in accordance with one embodiment, the frame pieces of the support framework are in the form of open hollow profile sections, which are preferably folded from sheet metal blanks.
In accordance with yet another embodiment, the mounting rails are formed as open or closed hollow profile sections, two profile sides of which form fastening holes, and the profile side sections of the frame pieces of the support framework forming the receiving means for the mounting rail abut on profile sides of the mounting rails. Thus, upon connection to the frame pieces of the support framework, the mounting rails always adopt a specific position.
In order to achieve universal possibilit

REFERENCES:
patent: 3087768 (1963-04-01), Anderson et al.
patent: 4643319 (1987-02-01), Debus et al.
patent: 4988008 (1991-01-01), Blum et al.
patent: 5046791 (1991-09-01), Kooiman
patent: 5275296 (1994-01-01), Zacharai
patent: 5333950 (1994-08-01), Zachrai

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