Joints and connections – With opening for access to connector or operator – To threaded component
Patent
1984-05-14
1986-03-11
Kundrat, Andrew V.
Joints and connections
With opening for access to connector or operator
To threaded component
403250, 108156, B25G 300, F16D 100
Patent
active
045752753
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
Field of the Invention
The present invention relates to a clamping device for the purpose of attaching a component, which is inserted into a hole, for example, a table leg, which is inserted with its upper end into a hole in a table frame or a table top.
BRIEF SUMMARY OF THE INVENTION
The clamping device is composed of a casing of a deformable material, for example plastics, inserted in a recess in the end of the component, the casing having a V-shaped notch open towards the end. Into this notch a wedge is inserted with its longitudinal direction parallel with the end surface of the component, and a screw is guided through a hole in the casing and screwed into a threaded hole through the wedge with its head adjoining an adjacent surface in the casing, so that, when tightening the screw, the wedge is pressed down into the notch of the casing by displacing parts of the casing on both sides of the notch against parts of the component on both sides of the recess thereby pressing the latter parts against the wall of the hole at right angles to the longitudinal direction of the wedge.
The object of the invention is to achieve a shaping of the clamping device in order to obtain pressure against the wall of the hole also at right angles to the last-mentioned pressure direction and thus an improved attachment of the component in the hole.
The invention will now be described in detail with reference to the accompanying drawings wherein:
FIG. 1 is a view partly cut-away and cross in section, of part of a table frame or table top with an attached table leg, which is inserted with its upper end into a hole in said frame or top and attached by a clamping device according to the invention;
FIG. 2 is a cross-sectional view taken along the line A--A in FIG. 1 showing the upper end of the table leg with the screw omitted;
FIG. 3 is a cross-sectional view taken along the line B--B in FIG. 1 with the screw omitted; and
FIG. 4 is a view similar to FIG. 3 showing an alterative implementation of some details relating to the invention.
DETAILED DESCRIPTION
In the drawing, 1 is part of a table frame or table top which on the underside has a hole 2 for a table leg 3 which is inserted into this hole at its upper end. The upper portion of the table leg has essentially in cross-section a U-shaped recess 4 into which a casing 5 is inserted.The casing, which is preferably manufactured of a deformable material such as nylon consists of two halves 6 which are connected to each other in the lower portions thereof by a relatively thin deformable wire 7. The outer walls 8 of the casing could, as shown in FIGS. 3 and 4, be knurled or serrated for a better grip against the walls of recess 4. In its upper portion the casing has a V-shaped notch 9, which is open toward the top. A wedge 10 with a preferably semi-cylindrical cross-section is inserted in the upper part of the notch. This wedge has a threaded hole 11 for a scew 12 to be screwed into the hole and guided through a corresponding hole 13 in the lower portion of the casing and the screw has a head 14 adjoining a contact surface 15 around the hole 13 in the lower portion of the casing.
According to the invention, the common axis of the holes 11 and 13 is arranged at an angle for example, 40.degree. to 60.degree., to the longitudinal direction of the wedge 10.
Tightening the screw 12 forces the wedge 10 some distance down between the sides of the casing between parts 6 which are located around the notch 3 and in this way these parts are pressed against the sides of the parts 16 which are located around the recess 4. These parts are pressed in this way against the wall of hole 2 in directions which are at right angles to the longitudinal direction of the wedge. At the same time, the angular force of the screw displaces the wedge somewhat in its longitudnal direction so that its one end 17 presses against the wall of the hole at that end as indicated in FIG. 1 with a broken line, which indicates the tightened location of the wedge. In this position with
REFERENCES:
patent: 914846 (1909-03-01), Jones
patent: 3491706 (1970-01-01), Glass
patent: 3787132 (1974-01-01), Garnett
patent: 4190375 (1980-02-01), Berry
patent: 4308802 (1982-01-01), Munz
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