Cutting – With means to convey work relative to tool station – Cut made parallel to direction of and during work movement
Patent
1995-06-09
1997-10-21
Rada, Rinaldi I.
Cutting
With means to convey work relative to tool station
Cut made parallel to direction of and during work movement
834372, 1442451, 1442456, B27B 2510
Patent
active
056784678
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention is directed to an exchangeable handle for wooden pushers, which handle has a grip that is fastened at a base plate which is L-shaped in cross section and has a long leg and a short leg in which spikes are provided for driving into the wooden pusher. The spikes attached to the short leg project at right angles from the short leg and extending parallel to the long leg.
DESCRIPTION OF THE PRIOR ART
When cutting small workpieces in wood cutting machines using manual guidance, wooden pushers are used to guide the workpiece past the tool and to press the workpiece against a stop or withdraw it from the tool. This pusher prevents the hand of the operator from entering the immediate vicinity of the tool, thus avoiding the possibility of injury. When working with machine tools such as cutting machines, planing machines, circular saws or band saws, the wooden pushers regularly enter the working area of the tool so that they are subject to severe wear and must be replaced often. Wooden pushers in a wide variety of shapes are available for different work processes and are used by the woodworker as the need arises. The exchangeable handle mentioned above, which can be attached to the wooden pusher by its spikes in a relatively simple manner, is used for exchange and simple handling of the wooden pushers.
In an exchangeable handle constructed in the manner described above, the spikes for engaging in the wooden pusher are rigidly attached to the short leg and also the long leg of the L-shaped base plate. A leaf spring is attached in a rotatable manner to a cheek projecting down from a longitudinal side of the long leg. At its free end, this leaf spring carries another spike which must be pressed, through a bore hole in the cheek, into a narrow side of the wooden pusher. Due to their arrangement at a fixed angle of 90.degree., the rigid spikes are at risk of breaking off easily when fastened to or removed from the wooden pusher, for which reason they are designed to be exchangeable. The spike attached to the leaf spring especially can be bent easily so that it no longer engages in the bore hole of the cheek but, rather, contacts the cheek next to the bore hole. Due to the lateral cheek projecting from the long leg of the base plate, two different exchangeable handles must be available, depending on whether the stop of the machine tool is located to the right or to the left of the workpiece. Finally, a tool is required to pull the leaf spring into the disengaged position.
SUMMARY OF THE INVENTION
The object of the present invention is to provide a universally applicable exchangeable handle for wooden pushers which can be used for any kind of job at an optimal position on the wooden pusher in every case and can be fastened to the wooden pusher required in a given case merely by a few manual adjustments without requiring tools or the delivery of blows.
In an exchangeable handle of the generic type outlined above, this object is met according to the invention in that the spikes provided at the free end of the long leg are fastened to a swivel lever which is rotatable about a shaft.
Since the exchangeable handle according to the invention has no cheek projecting down on either of its longitudinal sides, it may be fastened to the wooden pusher on the right or left side or in the center. The spikes fastened to the swivel lever are driven into the wooden pusher from above when the swivel lever is actuated and, in so doing, draw the spikes projecting at the short leg into the wooden pusher so as to achieve a very fast and stable fastening of the handle at the wooden pusher. There is no risk of breaking or bending of spikes since all spikes are loaded only in the direction of their longitudinal axis, but not transversely thereto.
The swivel lever is fastened in a stationary manner with an actuating lever whose free end preferably faces the short leg of the base plate. Accordingly, the actuating lever does not project out so as to impede work in which the exchangeable handle must be moved
REFERENCES:
patent: 2696852 (1954-12-01), Dunton
patent: 2839100 (1958-06-01), Valicenti
patent: 4164882 (1979-08-01), Mericle
patent: 4348925 (1982-09-01), Manweiler
patent: 4370909 (1983-02-01), Jennings
patent: 5113734 (1992-05-01), Mahler
Rada Rinaldi I.
Woods Raymond D.
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