Supports: cabinet structure – With movable components – Horizontally movable
Patent
1992-10-08
1994-09-06
Dorner, Kenneth J.
Supports: cabinet structure
With movable components
Horizontally movable
31233433, 31233434, A47B 8806
Patent
active
053442270
DESCRIPTION:
BRIEF SUMMARY
The invention relates to an extension guide for drawers with a extension rail, attached to the drawer; a support rail, attached to the body of the furniture, and a central rail between both rails on each side of the drawer, wherein wagons are provided that hold the load-transferring rolling bodies and the central rails exhibit a bottom U profile in which the rollers in the wagons, transferring the load of the drawer from the central rails to the support rails, are guided.
There exist both socalled single extensions, where each side of the drawer exhibits only a drawer-sided extension rail and a body-sided support rail, and full extensions of the aforementioned kind, wherein each side of the drawer has another central rail between the extension rail and the support rail. A drawer provided with a single extension can be largely, but not totally pulled out of the body of the furniture, if said drawer is to remain anchored in the body of the furniture. The full extensions are more expensive in their construction, but allow the drawer to be completely pulled out, thus giving better access to the objects located at the rear end of the drawer.
Furthermore, extension guides are distinguished according to the kind of bearing for the rollers. There exist extension guides, where the load-transferring rollers are supported on the rails with axles; and there are extension guides, where the rollers and balls are supported in their own wagons between the rails. In the latter case the rollers or balls run differentially between the rails.
A full extension is known from the DE-A1 26 13 775, where both rollers supported on the central rails and rollers located in cages between the rails and are not supported on any rails are used. In so doing, the roller supported on the rail has the function of a carrier roller, which is to ensure that the rails are moved synchronously and thus the inner rail and the central rail reach the fully pushed in position at the same time.
Experience has shown that drawers provided with a full extension are usually not totally pulled out of the body of the furniture. This potential is to be given only in principle.
The object of the invention is to provide an extension guide that combines the two systems by an improved method so that an easy conversion from single extension to full extension is possible.
One embodiment of the invention provides that sliders for the load transfer from the extension rails to the central rails are disposed at the top at the central rails, and the extension rails exhibit a U profile with an additional bottom horizontal leg, which reaches under the sliders and forms a lift-off safety for the drawer.
It is provided advantageously that the sliders incorporated into the extension rails are narrower than the extension rails and allow the extension rails to be moved sideways.
One embodiment provides that the extension rails are part of a double walled drawer frame and are moulded to the inner wall of the drawer frame.
To prevent the drawer from tilting, it is provided advantageously that the space between the rollers or the sliders is greater than half the length of the extension rails.
Another embodiment provides that the drawer frame below the extension rail exhibits a wide region; and that in this wide region the central rail is incorporated. The central rail is covered totally by the drawer frame.
Another embodiment of the invention provides that at least one wagon is guided between the sliders on the central rails, whereby the diameter of the rollers supported therein is greater than the height of the sliders; and a carrier is provided between the central rails and the extension rails.
The extension guide of the invention functions in the rear region in turn as a single extension. The central rails are held at the extension rails and a relative movement occurs only between the central rails and the support rails.
To increase the reliability of such an extension guide and to ensure that a closed drawer is not opened unintentionally by jolts or the like and that in the f
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Dubach Fredi
Rock Erich
Anderson Gerald
Dorner Kenneth J.
Julius Blum Gesellschaft m.b.H.
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