Supports: cabinet structure – Knockdown or setup type – Skeletal frame
Reexamination Certificate
1999-05-12
2001-05-29
Cuomo, Peter M. (Department: 3624)
Supports: cabinet structure
Knockdown or setup type
Skeletal frame
C312S223100, C211S192000
Reexamination Certificate
active
06238028
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a rack made of frame legs for a switchgear cabinet, wherein the frame legs have two fastening shoulders with respectively one fastening section arranged parallel with the associated exteriors of the rack and one profiled side arranged vertically with respect to the associated exterior of the rack, and the fastener sections and the profiled sides have rows of fastening retainers spaced apart at equal distances.
2. Description of Prior Art
A rack of this type is known from German Patent Reference DE 43 36 285 A1. Such frame legs are constructed symmetrically in relation to their cross-sectional diagonal line. The fastening shoulders are arranged on both sides of the cross-sectional diagonal line at a connecting section, which faces outward from a corner section of the rack. The fastening sections and the profiled sides with their fastener retainers are attached to the fastening shoulders. The fastening section and the profiled side of a fastening shoulder are arranged at right angles with respect to each other. Assembly rails or the like can be fastened on the fastening retainers. Built-ins, such as electronic units, for example, can then be attached to the assembly rails.
Such assembly rails are described in German Patent Reference DE 195 03 289, for example. The assembly rails, which are U-shaped in cross section, are screwed to the fastener retainers of the fastening shoulders of two adjoining vertical frame legs by means of elbows.
SUMMARY OF THE INVENTION
It is one object of this invention to create a rack of the type mentioned above in which the fastening locations for the built-ins are standardized.
The above object of this invention is achieved by the distance between the profiled sides of the one fastening shoulder and the fastening sections of the other fastener shoulder being respectively equal to the divisional distance of the fastening members, or by the distance corresponding to a multiple of the divisional distance.
Because the distance between the fastener retainers of the profiled sides and the fastening retainers of the fastening sections has a fixed relationship with the divisional distance of the fastener retainers between each other, it is possible to create a rack, wherein the fastening locations for the built-ins form a spatial grid. The built-ins can be arbitrarily installed in this grid in the rack, which provides a great variability of the attachment options of built-ins. In this case the distance can be equal to the divisional distance of the fastener retainers, or it is a multiple of this distance. Here, a multiple can also be a fraction of the distance. It is important that a circumferential fastening grid results. It is also possible within the divisional difference to use intermediate fastener retainers in the rows of fastener retainers in the fastening grid.
In accordance with one advantageous embodiment of this invention, the fastening sections of two adjacent vertical frame legs of the rack form a first assembly level, and the profiled sides extending parallel therewith form a second assembly level. The continuous assembly rails can be fastened on the fastening retainers of the fastening sections and of the profiled sides.
The two assembly levels are spaced apart from each other at the divisional distance or a multiple thereof. Attachment options for built-ins of different width result because of these two parallel assembly levels.
It is advantageous if the assembly rails have a support section arranged on the first or second assembly level and which has at least one row of fastener retainers. The fastener retainers have the same divisional distance from each other, which corresponds to the divisional distance at the profiled sides, or respectively the fastening sections or a multiple thereof. Thus the divisional grid formed by the fastener retainers of the frame legs is continued in the assembly rails.
A simple design of the assembly rail is distinguished because it is formed, U-shaped in cross section, by the support section and two strips connected therewith, which are spaced apart and positioned parallel from each other.
If the strips of the assembly rail have fastener retainers, further attachment possibilities for built-ins are provided. A fixed divisional grid is also maintained with the rows of fastener retainers.
For the attachment of assembly rails on the frame legs, an embodiment in accordance with this invention is distinguished because tabs projecting toward the front are formed on the support section of the assembly rail, which can be fixed in place by fastening elements on the fastening sections or the profiled sides. The tabs are offset in relation to the support section, so that the support section lies on the level formed by the profiled sides/fastening sections. Thus the assembly rails are located on the assembly levels formed by the profiled sides/fastening sections.
In accordance with a further embodiment of this invention, wall elements can be attached to the fastening elements and/or the profiled sides. Linings, for example, can be attached as wall elements, which cover an entire side or only a partial area of the side of the rack. The wall elements can also be designed as assembly plates.
In this case in particular exterior walls can be arranged parallel with the wall elements and shafts, for example for cables, insulating, absorbing material, or as air-guidance channels, can be formed between the wall elements and the exterior walls.
REFERENCES:
patent: 2756369 (1956-07-01), Gorrie
patent: 3056639 (1962-10-01), Caminker et al.
patent: 3338012 (1967-08-01), Kappenhagen et al.
patent: 285 914 (1953-01-01), None
patent: 2 043 699 (1972-03-01), None
patent: 41 37 836 C1 (1993-03-01), None
patent: 94 06 323 (1994-09-01), None
patent: 43 36 285 (1995-04-01), None
patent: 195 03 289 (1996-08-01), None
patent: 195 37 016 C1 (1996-10-01), None
Rittal Handbuch 28 (4 pages), No date.
Benner Rolf
Kohler Martina
Reuter Wolfgang
Anderson Jerry A.
Cuomo Peter M.
Pauley Peterson Kinne & Fejer
Rittal--Werk Rudolf Loh GmbH & Co. KG
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