Woodworking – Cutter hood or dust conveyor – With sifter – sorter – or separator
Patent
1990-08-17
1991-07-16
Bray, W. Donald
Woodworking
Cutter hood or dust conveyor
With sifter, sorter, or separator
408 67, 409137, 144 82, B27G 1900
Patent
active
050316788
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a mortising machine.
More particularly, it relates to a mortising machine which is formed as a hand-held machine and has a base plate to be arranged on a surface of a workpiece to be machined, a mortising tool arranged to penetrate into the workpiece to remove chips and extending through an opening in the base plate so as to produce a groove-like recess in the workpiece during displacement of the mortising machine, and a chip removing device provided with a suction opening in the area of the opening of the base plate. In such mortising machines, the dust removing device sucks out the milled chips directly around the mortising cutter. But it is not possible also to completely remove the chips deposited in the mortise groove--at any event, with the conventional suction line.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the present invention to provide a mortising machine which avoids the disadvantages of the prior art.
In keeping with these objects and with others which will become apparent hereinafter, one feature of the present invention resides, briefly stated, in a mortising machine, in which the chip removing device, in addition to the first suction opening, has also a second suction opening, spaced from the first suction opening and open out in the area of a mortising recess at the workpiece.
When the mortising machine is designed in accordance with the present invention, almost all chips can be removed via a second suction which extends close to the mortise groove and in particular is equipped with a deformable body reaching into the groove. The deformable body prevents the chips from exiting through the mortised groove and dams up the milled material. This has the advantage that the dammed up chips can be sucked out via the second suction opening in a closed manner. In accordance with another feature of the present invention, the second suction opening is provided with a deformable body, which can be formed as a broom, projecting forward in the manner of an apron and insertable into the mortised recess so as to hold back the milled chips in a sealing manner. The construction of the deformable body as a broom which is arranged at the rear wall of the second suction opening so as to be adjustable with respect to height and can be inserted into the mortised groove up to the base is particularly advantageous. In accordance with still a further feature of the present invention, a profile, particularly a saw tooth profile, can be arranged in a rear wall of a suction connection piece of the chip removing device, so that the broom is insertable in the profile in a plurality of positions. The multiplestepped sawtooth profile in the rear wall of the suction opening is simple to produce and enables a simple operation of the height adjustment. Moreover, the broom is easily exchangeable. The suction connection piece with the second suction opening is connected with the chip removing device in a simple manner in that it is detachably clamped at a tubular central part of the suction device by means of two elastic clamping arms which are connected in one piece with the suction connection piece. This provides the additional advantage that the suction connection piece can be rotated The novel features which are considered as characteristic for the invention are set forth in particular in the appended claims. The invention itself, however, both as to its construction and its method of operation, together with additional objects and advantages thereof, will be best understood from the following description of specific embodiments when read in connection with the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWING
FIG. 1 shows a longitudinal section through the base plate of a mortising machine and a dust removing device;
FIG. 2 shows a cross section according to line II--II in FIG. 1.
DESCRIPTION OF PREFERRED EMBODIMENTS
A known hand-held mortising machine, which is constructed as a recessing and shaping machine 1, substantially has a
REFERENCES:
patent: 2343875 (1944-03-01), Schwartz
patent: 3942411 (1976-03-01), Gerber
patent: 4011792 (1977-03-01), Davis
patent: 4037982 (1977-07-01), Clement
patent: 4409699 (1983-10-01), Moorhouse
patent: 4742855 (1988-05-01), Hartley
Muller Joachim
Remmele Berhard
Smith Kenneth
Bray W. Donald
Robert & Bosch GmbH
Striker Michael J.
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