Supports: cabinet structure – Having particular cabinet support – Wheel mounting feature
Patent
1997-02-10
1998-06-23
Cuomo, Peter M.
Supports: cabinet structure
Having particular cabinet support
Wheel mounting feature
3122654, 248581, 248632, 211 26, H02B 100
Patent
active
057695199
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a switchgear cabinet with a rack fastened on a frame base, which is assembled from frame legs and is closed or can be closed with wall elements and at least one cabinet door.
2. Description of Prior Art
In known switchgear cabinets of this type, the base and the rack are fixedly connected with each other and form a rigid unit together with the wall elements fixed on the rack, in which built-ins are fixedly installed. If such a switchgear cabinet is employed in an earthquake area, there is the danger that great damage can be caused because of the solid, rigid construction, which leads to complete breakdown.
SUMMARY OF THE INVENTION
It is one object of this invention to produce a switchgear cabinet of the type mentioned above, which resists forces occurring in the course of an earthquake and, if possible, remains able to function, wherein simple parts can be used, which can also be retrofitted in standard cabinets.
In accordance with this invention this object is attained with a lower frame of a rack connected by the undersides of frame legs by a plate-shaped damping frame to the top of the base, which can be fixedly connected with the support surface.
Through the damping frame, the base fixedly connected with the support surface allows a displacement, limited on all sides, of the rack, so that the forces transmitted by an earthquake through the base are absorbed by the damping frame. The rack can be displaced as a unit with respect to the base, so that damages are considerably reduced, if not even prevented. It is possible in connection with a standard cabinet to easily retrofit the damping frame after removal of the base.
In accordance with one embodiment of this invention, the top of the base supports U-shaped rails in a frame shape, which form a receptacle, open at the top, for the plate-shaped damping frame, so that laterally acting shearing and tensile forces can be absorbed by the damping frame.
An unintentional release of the rack from the base is prevented in that the rack and the base are loosely connected with each other in the corner areas, through the damping frame, by screws.
In accordance with a further embodiment, near the lower frame of the rack facing the interior space of the switchgear cabinet, there is a guide frame with guide bars for a mounting plate with small guide blocks fastened on the plate-shaped damping frame. The mounting plate with the devices or the like fastened thereon is also housed resiliently on all sides in the rack. In this case the guide frame is not in connection with the switchgear cabinet and is resiliently fastened on all sides. It is also possible to utilize only guide rails in place of the guide frame.
Dependability can further be increased when the rack is resiliently suspended in an area of its upper frame by spring elements on a support rail or a support frame which can be fixed on a wall or a cover.
A further embodiment provides that the damping frame has a vertical bar which fills the space between the frame legs of the lower frame of the rack and the guide frame.
BRIEF DESCRIPTION OF DRAWINGS
This invention is explained in view of an exemplary embodiment represented in the drawings wherein:
FIG. 1 is a perspective view of a basic structure of a switchgear cabinet with a base, damping frame, rack and mounting plate;
FIG. 2 is a perspective partial view of a connection between the base, damping frame, guide frame and rack;
FIG. 3 is a perspective exploded partial view of a connection of an upper area of a mounting plate with the rack; and
FIG. 4 is a perspective view of a resilient attachment of an upper area of a rack on a wall, according to one preferred embodiment of this invention.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
The lateral legs 11 and 12 of the frame base 10 is shown in FIG. 1, which in such embodiment are square hollow profiled sections which can be fastened to a support surface in a known manner, for example by screwing. The lower and upper frames
REFERENCES:
patent: 1873009 (1932-08-01), Miller, Jr. et al.
patent: 2014581 (1935-09-01), Norton
patent: 2404403 (1946-07-01), Poylo
patent: 3265419 (1966-08-01), Durnbaugh et al.
patent: 4592602 (1986-06-01), Kuster et al.
patent: 4766708 (1988-08-01), Sing
patent: 5228762 (1993-07-01), Mascrier
patent: 5289348 (1994-02-01), Miller
patent: 5333950 (1994-08-01), Zachrai
patent: 5383723 (1995-01-01), Meyer
Cuomo Peter M.
Rittal--Werk Rudolf Loh GmbH & Co. KG
Wilkens Janet M.
LandOfFree
Switchgear cabinet with framework and base does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Switchgear cabinet with framework and base, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Switchgear cabinet with framework and base will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1388224