Supports: cabinet structure – Knockdown or setup type – Skeletal frame
Reexamination Certificate
1999-04-16
2001-08-14
Cuomo, Peter M. (Department: 3624)
Supports: cabinet structure
Knockdown or setup type
Skeletal frame
C211S183000, C211S182000
Reexamination Certificate
active
06273533
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a frame piece for a switching cabinet.
2. Description of Prior Art
Greatly varied requirements are set for a rack for a switching cabinet and these requirements must be fulfilled by all the cross-sectional shapes of the frame pieces used. In an area of the bottom frame or the top frame, one can use frame pieces which have a cross-sectional form different from the vertical frame piece. Especially for the frame pieces which are in the vertical direction of the rack, as many fastening possibilities as possible are required in several directions. Moreover, with as low material expenditure for the frame piece as possible, optimum strength, preferably strength to deformation, and yet simple manufacture of the frame piece should be possible. Moreover, in the region of the vertical outside corner edges of the rack, sufficient free space should be available to apply the hinge for a cabinet door and to form an introduced sealing element for the side walls to be introduced or for the back wall of the cabinet.
Many frame pieces are known for the rack of a switching cabinet, which partly fulfill the requirements named above, but do not offer satisfactory solution in all respects. Frame pieces designed as open hollow profile sections are considerably worse than closed hollow profile sections.
SUMMARY OF THE INVENTION
It is one object of this invention to provide a frame piece for a rack of a switching cabinet which, particularly when used as vertical frame piece, fulfills sufficiently requirements for high strength for universal possibilities of fastening with low material expenditure and simple manufacture.
This object is solved by the following characteristics:
a) With a profile inside and a profile outside, the frame piece forms a closed hollow profile with one or two longitudinally directed hollow spaces;
b) the profile outside delineates a free space to the outside corner edge of the rack;
c) the profile inside has a profile section with several rows of fastening seats or several profile sections at an angle to one another with at least one series of fastening seats; and
d) the profile inside and the profile outside form outside edges in a region of the right-angled abutting outsides of the rack, wherein the outside edges are designed as double-layer sealing struts or are connected in a direction to an outside corner edge connecting struts with or without receiving grooves for sealing elements.
The free space to the outside corner edge delineated by the profile sides of the profile outside offers sufficient clearance for swinging a cabinet door as well as to introduce beveled paneling elements at the frame piece. The sealing struts, connecting struts and/or receiving grooves in the connecting struts of the profile outside offer many possible variations. The closed hollow profile of the frame piece with one or two hollow spaces has very good stability, especially deformation strength, which can also be used to minimize the material expenditure for the frame piece, especially when the frame piece is stamped from a strip, is bent and is assembled.
According to one embodiment, the free space is delineated at least in partial regions starting from the outside of the rack by profile sides of the profile outside standing perpendicularly to the facing outsides. Thus, even with a small distance between the outside edges of the frame piece and the outside corner edge of the rack, a sufficiently large inlet opening into the free space is created.
In one preferred embodiment the profile sides of the profile outside delineating the free space are connected through a connecting section with one another and/or with the profile inside, and the free space is thus delineated in its depth in the region of the rack diagonal and the connecting section of the profile outside increases the deformation strength of the frame piece. The possibilities of fastening on the frame piece can be increased in the area of the outside of the profile also, by providing additional fastening seats in the connecting section.
The profile inside is a profiled side guided from outside edge to outside edge, which has fastening seats in a mirror-image manner to the rack diagonal. A greater flexibility with regard to the fastening planes and directions is achieved by the profile inside being formed from three profile sides arranged in a U-shape, where the profile sides starting from the outsides of the rack and thus from the outside edges, at an angle of 45° to the outside edges. In this case, the third profile side, which is perpendicular to the two profile sides of the profile inside have fastening seats in a mirror-image manner to the rack diagonal. The profile sides of the profile outside that stand perpendicular to the outsides of the rack can be connected directly to the profile inside. In this case, the profile inside and the profile outside enclose two identical hollow spaces, which can be designed so that a cross-section is an equilateral triangle or an isosceles rectangular triangle.
However, the direction of the profile sides of the profile inside and profile outside can also be arranged so that the profile inside and the profile outside enclose two identical hollow spaces which have an essentially square or rectangular cross section.
According to another embodiment, for reasons of stability, two profile sides of the profile inside are each arranged in one plane with a profile side of the profile outside whereby the planes are perpendicular to one another and perpendicular to the outsides of the rack.
The stiffening of the profile inside can be simply achieved by connecting the profile sides of the profile inside facing the rack diagonal through a connecting section running perpendicular to the diagonal of the rack. The connecting section of the profile inside can be used as a result of this as an additional fastening plane, by providing the connecting section of the profile inside with additional fastening seats.
If the profile inside and the profile outside enclose a single hollow space which has mirror-image symmetry with respect to the rack diagonal, then the profile inside and the profile outside are at a distance and can be optimally designed for and dictated by stability of the frame piece.
If the profile outside of the frame piece has a connecting section, then this can also carry fastening seats which make it possible to attach parts to the outside of the profile.
According to one embodiment, the profile sides of the profile inside and/or the profile sides of the profile outside form an open, undercut recess, which is open toward the inner space of the rack and/or to the outside corner edge and which facilitates the incorporation of mounting tracks and similar.
In one preferred embodiment, there is mirror-image symmetry with respect to the rack diagonal, because the incorporation of the frame piece into the rack is facilitated. The ends of the frame piece can then be interchanged.
The frame piece can be easily produced as a section of an extruded profile.
According to another manufacturing method, the frame piece is produced as a stamped-bent part, the point of impact and point of connection of which is placed in the area of a connecting section of the profile inside or profile outside.
REFERENCES:
patent: 4158998 (1979-06-01), Clement
patent: 5992646 (1999-11-01), Benner et al.
patent: 6062664 (2000-10-01), Benner
patent: 6070957 (2000-06-01), Zachrai
patent: 6138843 (2000-10-01), Nicolai et al.
patent: 4336285 (1995-04-01), None
Munch Udo
Nicolai Walter
Vogel Georg
Anderson Jerry
Cuomo Peter M.
Pauley Petersen Kinne & Fejer
Rittal--Werk Rudolf Loh GmbH & Co. KG
LandOfFree
Frame piece for a rack for a switching cabinet does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Frame piece for a rack for a switching cabinet, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Frame piece for a rack for a switching cabinet will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2535857