Woodworking – Work guide – Work held by corner or diagonal work
Patent
1987-04-17
1988-11-08
Bray, W. Donald
Woodworking
Work guide
Work held by corner or diagonal work
83467R, 144117R, 269315, B27C 3100, B27C 112
Patent
active
047828714
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a stop device for woodworking machines, particularly planing machines, having a stop plate on the machine table with an auxiliary stop ledge pivotally mounted on said plate and swingable from an operating position lying on the machine table into a ready position.
BACKGROUND ART
A stop device is described and shown in German Utility Model 81 35 734. When working on narrow workpieces, the auxiliary stop ledge is swung into its operating position in which it rests on the machine table, whereby small disk-shaped feet serve as spacers between the auxiliary stop ledge and the machine table. In this operating position of the auxiliary stop ledge there is no danger of the hands of the operator slipping off the workpiece and being injured by the plane knife. On the other hand, if high workpieces are to be worked, for instance for the dressing of the narrow sides of boards, the auxiliary stop ledge must be swung into its ready position. In this ready position the auxiliary stop ledge is arranged behind and above the stop plate in the known device.
The known stop device is fully functional when the stop plate is in a vertical position. However, if it is necessary to bring the stop plate into an oblique position, for which purpose its back is fastened to a suitable holding and displacement mechanism, it cannot be avoided in most cases that the auxiliary stop ledge strikes against the upward protruding holding and displacement mechanism whereby it can be damaged; furthermore, in this ready position the holding and displacement mechanism cannot be actuated. Not least of all, in this oblique position the auxiliary stop ledge cannot be swung back sufficiently far, so that it extends into the path of movement of the workpieces thus rendering the working of high workpieces impossible.
DISCLOSURE OF THE INVENTION
One of the objects of the present invention is to provide a stop device of the aforementioned type in which the auxiliary stop ledge in its ready position is arranged so that irrespective of the position of the stop plate it does not interfere with and prevent the operation of auxiliary and displacement mechanisms for placing the stop plate in an oblique position.
In accordance with the present invention this object is achieved in a stop device of the above-indicated type in the manner that, in its ready position, the auxiliary stop ledge is lowered into a recess provided in the stop plate which is fitted to the dimensions of the auxiliary stop ledge.
In this solution, the auxiliary stop ledge, in its ready position, forms a unit with the stop plate and is integrated in it so that the stop plate can be easily attached to all ordinary holding and displacement mechanisms without the auxiliary stop ledge presenting an obstacle in its ready position.
In a preferred embodiment of the present invention, the recess forms a slot which is provided in the stop plate starting from at the upper longitudinal edge thereof.
This solution has the advantage that the auxiliary stop ledge is reliably seated in its ready position without impairing the front side of the stop plate which serves as a stop surface.
In another advantageous embodiment of the present invention, the free longitudinal side of the auxiliary stop ledge which forms the stop edge is provided with a grip and guide edge which, in the operating position, protrudes upwardly therefrom.
This grip and guide edge simultaneously accomplishes two objectives. First it facilitates the handling upon the pulling of the auxiliary stop ledge out of the slot into its operating position and, secondly, it affords the operator a guide for his hand so that his hand cannot slip off during the advancing of the workpiece.
In accordance with another embodiment of the present invention, each of the two ends of the auxiliary stop ledge is pivotally connected via a swing arm to a vertically displaceable slide block which is mounted in a longitudinal guide on the corresponding end side of the stop plate.
In this connection, the auxiliary
REFERENCES:
patent: 2183190 (1939-12-01), Haas
patent: 2719548 (1955-10-01), Mitchell
patent: 3289714 (1966-12-01), Hammer
patent: 3714856 (1973-02-01), Hall et al.
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