Supports: cabinet structure – Knockdown or setup type – Skeletal frame
Patent
1997-04-28
1998-09-15
Cuomo, Peter M.
Supports: cabinet structure
Knockdown or setup type
Skeletal frame
3122654, 3122655, 3122656, 49401, H05K 718, H02B 138
Patent
active
058069461
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a switchgear cabinet with a rack constructed of frame legs and corner connectors, with open sides that can be closed or are closed by lateral walls, and having a rear wall, a sheet metal bottom piece, a sheet metal cover piece and at least one door.
2. Description of Prior Art
In conventional switchgear cabinets, two profiled sides of the frame legs placed vertically with respect to each other normally form exteriors of the rack and one of the exterior edges of the rack. For hinging such door it is necessary to attach hinge elements on the vertical frame legs. In addition, on the lock side of the door it is necessary to attach locking elements for the locking device attached to the door. In this case the attachment side of the door to the rack is often fixed and cannot be changed in a simple manner at the place where the switchgear cabinet is used. Normally, an open side of the rack is closed by the door.
SUMMARY OF THE INVENTION
In connection with a switchgear cabinet of the type mentioned above, it is one object of this invention to hinge a door on a rack without special hinge and closing elements, wherein the attachment side and the closing side can be easily interchanged and wherein the door intended for one side of the rack can also be arbitrarily attached to the opposite side of the rack.
This object is attained in accordance with one preferred embodiment of this invention wherein at least the vertical frame legs are beveled in an area of outer edges and thus constitute a receiver for beveled edges of the lateral walls and the door. The corner connectors cover the receivers of the frame legs and have on a side facing the receivers plug receivers or hinge bolts. On a hinge side the door has hinge bolts or plug receivers, which can be inserted or are inserted into the plug receivers of the corner connectors, or into which the hinge bolts of the door are inserted or can be inserted. On a lock side the door has locking bolts, which can be inserted into and removed from plug receivers of the corner connectors by a closure device.
With this embodiment of the frame legs and corner connectors, the corner connectors also assume functions required for hinging and locking the door. What is needed is to provide plug receivers or hinge bolts on the corner connectors. The frame legs do not need to have hinge or locking elements. The receivers formed on the frame legs in an area of the outer edges provide sufficient space for receiving the beveled edge sections of the lateral walls and the door.
In accordance with one embodiment of this invention, the frame legs have two profiled sides placed vertically with respect to each other, which form exteriors of the rack. The profiled sides are connected with each other in an area of the outer edge by a profiled connecting section, which is placed at an angle of 135.degree. with respect to these profiled sides. With this embodiment the frame leg can be used as the hinge or lock side of the door for both adjoining sides of the rack.
The receiver in the area of the outer edge of the frame legs can be enlarged if the profiled sides make a transition into the connecting section with profiled transition sections which are placed vertically with respect to each other.
If the corner connectors have two surfaces located vertically with respect to each other, which constitute portions of the outer edges of the rack, and the surfaces terminate flush with the exteriors of the adjoining lateral walls and the closed door, there is a flush termination in a corner area of the switchgear cabinet.
In accordance with one embodiment, screws connect the lateral walls, the rear wall, the sheet metal bottom piece and the sheet metal cover piece to the corner connectors. Fastening on the frame legs is also possible without the wall elements having fastening bores for fastening screws.
Attachment of the door on the rack is made easier by the hinge bolts or locking bolts being adjustably guided and/or maintained in
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patent: 5222871 (1993-06-01), Meyer et al.
patent: 5228762 (1993-07-01), Mascrier
patent: 5275296 (1994-01-01), Zachrai
patent: 5407263 (1995-04-01), Jones et al.
patent: 5498073 (1996-03-01), Charbonneau et al.
Benner Rolf
Nicolai Walter
Strackbein Heinrich
Allred David E.
Cuomo Peter M.
Rittal--Werk Rudolf Loh GmbH & Co. KG
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