Metal tools and implements – making – Saw-making or furbishing device or machine
Patent
1986-10-08
1988-08-09
Parker, Roscoe V.
Metal tools and implements, making
Saw-making or furbishing device or machine
76 40, B23D 6316
Patent
active
047620277
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to an apparatus for sharpening the teeth of a saw and more specifically for sharpening the teeth of a saw which has a continuous chain of a portable saw, by means of a rotating, grinding wheel, for cutting tree trunks without removing the chain of the apparatus.
It is well known that in this type of operation, portable saws with motors are used, which saws have a shaped metallic blade emerging from the body of the saw. The saw is provided with grip handles, a panel, a chain sliding along the borders of the panel, the chain being provided with shaped teeth, which teeth carry out the cutting operation. However, the teeth frequently must be sharpened with an operation which up to the present time has been carried out by hand with special devices and with substantial difficulty. Occasionally bench sharpening devices are used which require dismounting of the chain from the saw.
The crux of the present invention resides in providing a machine which permits the sharpening operation of each tooth on the chain while the chain is being held by a gripping vice, which vice is located in the base of the saw. A grinding rotating wheel is located on the movable arm of the machine. The grinding wheel is controlled by its own electric motor so that it is possible to sharpen the teeth of the chain with very high regularity and accuracy.
The machine comprises a movable arm pivoted to the upper apex of a column emerging from the base of the machine. The arm carries the rotating, grinding wheel with its own electric motor, while on the base of the machine is located a guiding vice which grips the blade and the chain the teeth of which must be sharpened.
A suitable movable tooth fixed in a position which is adjustable is located on the base of the machine and supports the chain in a fixed position during the sharpening operation.
The rotation grinding wheel with its own control motor is capable of positions which may be regulated in depth as well as in height because the arm which carries the rotating grinding wheel is capable of rotating angularly according to an angle of about 40.degree. in every direction so that it is possible to sharpen alternately a series of teeth according to opposite angulations as it is required in the case of saws for a chain for tree trunks.
The invention is further illustrated by the drawings of which:
FIG. 1 illustrates a side view of the saw mounted on a panel which carries the chain to be sharpened with a tooth of the chain under the action of the grinding wheel;
FIG. 2 illustrates schematically a side view of the saw with two positions of the grinding wheel with a different depth;
FIG. 3 illustrates schematically a side view of the saw with two positions of the grinding wheel with a different height;
FIG. 4 illustrates a rear view of the upper part of the saw;
FIG. 5 illustrates a side view of the same upper part of the saw partially in cross section
FIG. 6 illustrates a front view of the saw showing the component elements;
FIG. 7 is a front view of the portion of the apparatus which varies the orientation of the grinding wheel.
As shown in FIG. 1 the apparatus comprises base 24 and vice 1 which consists of two jaws controlled by means of screws 23. The vice grips the chain to be sharpened while the screws 2 may be regulated to grip the support blade 3 which supports chain 4. The apparatus comprises a vertical column 8 on which is mounted pin 5 which carries the entire complex of the grinding rotating wheel 6 having center 27 provided with its own electrical motor 26, which grinding wheel provides for sharpening the teeth 7 of chain 4 according to a manner of operation which will be better described hereinbelow.
As shown in FIG. 2, one of the displacements which may be carried out by the grinding wheel 6 consists of a displacement in the longitudinal direction with respect to the axis of the chain, as shown in the figure with a thin line and with a thick line of the grinding wheel 6 and related supporting means. It is also noted that the entire column 8 which suppo
REFERENCES:
patent: 4319502 (1982-03-01), Smith
Fagiolini Floriano
Storti Gianfranco
Fercad S.P.A.
Parker Roscoe V.
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