Connecting hardware

Details Connecting hardware Connecting hardware

1996-06-20

1997-10-14

Kim, Harry C.

Joints and connections

Rod end to transverse side of member

Corner joint

403245, 4034071, 403DIG8, F16B 218

Patent

active

056764871

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND

The invention relates to connecting hardware for furniture parts, particularly for panel-shaped components of easily disassembled furniture, which are to be connected to one another, with a bolt, which protrudes from one of the furniture parts and can be introduced into a recess in the second furniture part, and with a tensioning element, which is provided in the recess in the second furniture part and engages the free end of the bolt, the bolt of a fastening bushing, inserted in a borehole, being held in the first furniture part.
Such connecting hardware is used to a large extent for the separable connection of outer walls or partitions of furniture to bottom or covering panels of wardrobes. In order to be able to brace the furniture parts, which are to be connected, permanently with one another by means of such connecting fittings, and also to be able to compensate, for example, for any shrinkage, which results from drying out and results in a loosening, it must be possible to realize means of tightening, with which tension can be exerted, by means of the tensioning element supported at the second furniture part, such as a tensioning eccentric, a screw or a tensioning wedge, on the bolt held in the first furniture part, so that the furniture parts are pulled together. At the same time, the tensioning forces, introduced into the bolt, attempt to pull the bolt out of the fastening borehole accommodating it. In order to cause the bolt to be held securely in the assigned furniture part, the bolts, which previously were screwed directly with a thread into the material of the furniture part, are screwed at the present time either into bushings, which are hammered in or pressed in and the diameter of which exceeds that of the borehole accommodating them, or into expansion bushings, which can be expanded like an expansion dowel by the screwing-in thread of the bolt itself, the bushings being produced preferably from plastic. In both cases, admittedly, an attempt is made to increase the resistance of the bushings to being pulled out by raising the peripheral ridges, which are saw-tooth-shaped in cross section. However, the strength, which can be achieved in this manner, is limited, particularly in furniture parts made from chipboard material. It may, for example, be observed, that in the course of time, when furniture parts, connected with the known connecting hardware, are assembled and disassembled repeatedly, the fastening borehole breaks open or tears out and the wardrobes in question can no longer be assembled after having been moved only a few times.
It is an object of the invention to improve, for connecting hardware of the type in question here, the mounting of the bolt, fastened in the first furniture part, in such a manner, that even repeated assemblies and disassemblies do not result in any damage to the furniture parts in the region of the fastening borehole; at the same time, however, simple and rapid assembly shall nevertheless be possible. Moreover, even after the connecting hardware is opened, it shall be possible to remove the protruding awkwardly shaped bolt without difficulties from the associated furniture part and to reinstall it once again later on.


SUMMARY OF THE INVENTION

Starting out from the connecting hardware of the initially-described type, this objective is accomplished pursuant to the invention owing to the fact that the end section of the bolt, which is to be held in the fastening bushing, is disposed eccentrically to the central axis of the bolt, so that it can rotate, in an accommodating opening of the fastening bushing and that the accommodating opening for the end section, which is to be held, is disposed offset by the same amount eccentrically to the external diameter of the fastening bushing. The eccentricity of the end section of the bolt and of the associated accommodating opening in the fastening bushing is selected so that the accommodating opening in the fastening bushing goes to the outside with the formation of a slot-like opening in the wall of the fast

REFERENCES:
patent: 4509882 (1985-04-01), Lautenschlager, Jr.
patent: 4549831 (1985-10-01), Lautenschlager, Jr.
patent: 4786204 (1988-11-01), Mayeda
patent: 5403109 (1995-04-01), Johnson et al.

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