Supports: racks – Special article – Electrically powered
Patent
1999-07-19
2000-12-05
Cuomo, Peter M.
Supports: racks
Special article
Electrically powered
211190, A47B 4703
Patent
active
061554340
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to an assembly rail for a switching cabinet designed as a stamped-bent part and having an assembly wall facing an interior of the switching cabinet, wherein the assembly wall has bent out lateral fasteners equipped with a fastening plate and wherein hooks are stamped and bent out from the fastening plate so that the hooks can be inserted into fastening mounts in the frame sections of the switching cabinet.
2. Description of Prior Art
This type of assembly rail is known from a company brochure of Rittal-Werk Rudolf Loh GmbH & Co. KG, in Herborn, Germany: Rittal Handbook 27, page 178. The assembly rails are designed as U-shaped rails, which are lengthened on their ends by fasteners. The fastener consists essentially of a fastening plate, from which the hooks are bent out by two bends. This creates a shoulder running across the longitudinal direction of the vertical frame section. The hook is supported on the square fastening mount of the frame section with this shoulder. Screws are tightened into the fastening plate and frame section for attachment to the frame section.
SUMMARY OF THE INVENTION
It is one objective of this invention to provide a mounting rail of the type mentioned at the beginning but that permits stable attachment to such frame sections, such as those which have only narrow, slotted fastening mounts.
This objective is solved by bending hooks from a fastening plate around a bending axis running in a longitudinal direction of the frame section, stamping out a hook projection from the bending point and determining a width of the hook by the material thickness of the fastening plate.
The width of the hook in this assembly rail is determined only by the material thickness of the fastening plate and can therefore be incorporated in slotted fastening mounts. The fastening mounts can have a width that is minimally greater than the material thickness of the fastening plate.
Because the hook is bent around a bending axis running in the longitudinal direction of the frame section, a support point is produced between the bending point and the hook projection with which the hook is supported on the fastening mount. Thus, the bending point is not exposed to stress during loading of the assembly point. Force is introduced only into the support point prescribed and thus achieves stable fastening.
According to a preferred embodiment of this invention, the hook has a slope on its hook protrusion, by which, starting from the free end of the hook protrusion, it widens toward the bending point over its extent in the longitudinal direction of the connected frame section and the slope is braced against the fastening mount designed as a slotted mount. With this simple measure, the fastener is pulled flush against the frame section via the hook. Only with this wedging of the hook against the slotted mount, the assembly rail is already securely fastened. As additional security, the assembly rail can also be screwed to the frame section.
In one possible embodiment of this invention the fastening plate is connected to the assembly wall via a transition section and the hooks are stamped and bent out at right angles starting from the point on the fastening plate facing away from the transition section. Because the hooks are stamped out and bent from free sides of the fastening plate, they can be easily manufactured. In addition, the hooks are arranged close to the free side of the fastening plate. A corresponding section side of the frame section that carries the slotted mount can be designed to be narrow. Thus, a space-saving connection is possible between the frame section and the assembly rail.
The hooks can be connected to the fastening plate via elastic projections to balance tolerances. The elastic projections also permit rigid bracing between the frame section and the fastening plate. The elastic projections can be configured so that, starting from the point at which the hook is bent out, the elastic projections are cut out from the f
REFERENCES:
patent: 4796541 (1989-01-01), Halstrick
Rittal Catalogue 27, p. 178, no date.
Benner Rolf
Kohler Martina
Munch Udo
Reuter Wolfgang
Anderson Jerry A.
Cuomo Peter M.
Rittal--Werk Rudolf Loh GmbH & Co. KG
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