Miscellaneous hardware (e.g. – bushing – carpet fastener – caster – Hinge – Including means to fasten leaf to member
Reexamination Certificate
1999-04-22
2001-01-23
Mah, Chuck Y. (Department: 3626)
Miscellaneous hardware (e.g., bushing, carpet fastener, caster,
Hinge
Including means to fasten leaf to member
C016S254000, C016S252000, C016S270000
Reexamination Certificate
active
06175992
ABSTRACT:
BACKGROUND OF THE INVENTION
The invention relates to a hinge for a metal cabinet, in particular, a switch cabinet, and is comprised of a first bearing support attached to the body of the metal cabinet and a second U-shaped bearing support mounted to the door of the metal cabinet and embracing the first bearing support, the door leaf having an angled portion extending toward the body of the metal cabinet and the second bearing support attached to the door leaf being inserted into a cutout provided in the area of the angled portion of the door. For cabinets mounted in a row, the rotation axle of the hinge is located external to the corner area formed by the angled portion of the door leaf.
A hinge with the aforementioned features is described in EP 0 223 871 B2; the second bearing support of this prior art hinge is attached to the door leaf by means of a clamping pin arrangement, wherein this clamping pin arrangement extend past the cutout area into the corner area formed by the angled portion and the door leaf and thereby secures in the cutout the second bearing support that is inserted into the door cutout. The clamping pin arrangement is embodied as a pin that penetrates both bearing supports.
The known hinge has the disadvantage with respect to the attachment of the second bearing support at the door that the arrangement of a clamping pin penetrating both bearing support s requires a special and complicated design of the first bearing support that is to be mounted on the cabinet body because the legs of this bearing support that project toward the door leaf have to be provided with a laterally open bore or recess for receiving the clamping pin when the door is closed. Furthermore, the stability of the door or of the corner area formed by the door and its angled portion, is negatively affected by the cutout provided there so that the door can be deformed in the area of the corner area when an according force acts on the hinge. Furthermore, the use of a clamping pin can be questionable with respect to various door leaf thicknesses and also the clamping pin cannot be handled in a reliable manner because it can be driven in either too tightly or too loosely. Furthermore, a clamping pin with a different and adjusted taper will have to be provided for each door leaf thickness.
It is therefore an object of the invention to suggest an attachment of the second bearing support at the door for a hinge of the aforementioned kind, with which the aforementioned disadvantages are prevented.
SUMMARY OF THE INVENTION
The solution to this object, including advantageous embodiments and further developments of the invention can be seen from the contents of the claims which follow this description.
The invention provides in its basic idea that, for attaching the second bearing support to the door leaf, the second bearing support is provided with a bore, extending angularly with its longitudinal axis to the door leaf and its angled portion, for receiving a fastener and is also provided with a U-shaped support bracket that embraces with its U-legs the second bearing support. The U-legs are supported on the door leaf and on the angled portion, and the support bracket is provided with a bore for penetration by the fastener. The invention has the advantage that by using the extra support bracket for attaching the second bearing support to the door leaf, the support action is moved outside of the weakened corner area and a support action of the support bracket is created against the angled portion of the door leaf. Thereby, the corner area of the door, weakened by the cutout is relieved. Providing an extra support bracket results in the use of the hinge to be independent from the thickness of the door because the pressure of the support bracket against the door or the angled portion, respectively, can be adjusted by the fastening bolt connecting the support bracket and the second bearing support. Finally, manipulation of the fastener is easy when the second bearing support is securely attached to the door.
One embodiment of the invention provides that the U-legs of the support bracket embrace the second bearing support above and below it, relative to the vertical axis of the metal cabinet, and extend into the corner area formed by the door leaf and its angled portion. It can be provided that the U-legs of the support bracket are provided with side surfaces which are aligned with the door leaf and its angled portion, respectively, and which rest against the door leaf and its angled portion when the fastener is inserted. Such an embodiment has the advantage that especially the corner areas above and below the cutout that receives the second bearing support is further stabilized by mounting the support bracket.
Alternatively, it can be provided that the U-legs of the support bracket laterally embrace the second bearing support parallel to the vertical axis of the metal cabinet and, with their end face areas, rest on the door leaf and on its angled portion.
In order to prevent shifting of the support bracket when the hinge is mounted, one embodiment of the invention can provide that the side surfaces of the U-legs of the support bracket are provided with pointed projections so that, when the fasteners is tightened, the pointed projections penetrate into the abutting surfaces of the door leaf or into the angled portion thereof, respectively. By this means a switch cabinet, for example, without switching devices in the door sheet metal, is also sufficiently grounded in accordance with the applicable standard.
According to different embodiments of the invention, the axis of the bore within the second bearing support for receiving the fastener can be aligned either with the angle bisector of the angle that is being formed by the door and its angled portion or the axis can extend at an angle to this imaginary line such that the angle bisector is intercepted in one direction or the other.
It is advantageous when the bore is a threaded bore and the fastener is a screw bolt.
REFERENCES:
patent: 511050 (1893-12-01), Irwin
patent: 4010504 (1977-03-01), Griffin
patent: 4827568 (1989-05-01), Ramsauer
patent: 4914781 (1990-04-01), Sokn et al.
patent: 4937916 (1990-07-01), Redman
patent: 5259091 (1993-11-01), Mordick
patent: 5906028 (1999-05-01), Whisman et al.
patent: 42 24 468 C1 (1992-07-01), None
patent: 0 223 871 B1 (1987-06-01), None
patent: 0 466 289 A1 (1992-01-01), None
EMKA Beschlagteile GmbH & Co. KG
Mah Chuck Y.
Robert W. Becker & Associates
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