JPS5836484Y2 - Blade adjustment mechanism - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a blade edge adjustment mechanism capable of adjusting the blade edge length and blade edge angle of a flat blade protruding from a groove formed on a base.

Conventionally, cutting tools for deburring plastics, planes, vegetable slicers, etc., have a base with a sliding surface, a narrow groove-shaped hole, and a blade receiving surface that slopes downward from the edge of the hole. A flat blade is attached to the blade receiving surface so as to slightly protrude from the sliding surface, and a workpiece that is in contact with the sliding surface is slid perpendicularly to the blade surface. Although the device is configured to perform cutting, it is difficult to adjust the length of the cutting edge protruding from the base sliding surface in such a device.
For this reason, in the past, pressure was applied to the back side of the blade to adjust the degree of protrusion of the cutting edge, but the darning method requires skill for adjustment and is difficult to make fine adjustments.

The purpose of the present invention is to eliminate the drawbacks of the prior art, and its features are that a narrow groove-shaped hole is bored on the base so as to be perpendicular to the cutting direction, and the bottom of the hole is A metal support is arranged on the bottom surface of the base so as to be inclined downward from the edge, and both ends of the support are pivotably supported on the side walls of the base, and the lower end is connected to the base through an adjustment screw with a spring inserted. Furthermore, the receiver has a flat plate-like blade with cutting edges formed symmetrically on both the upper and lower sides, which is replaceably fixed to the back of the metal plate.

Hereinafter, the present invention will be explained based on the drawings. Figs. 1 and 2 show a woodworking planer according to an embodiment of the present invention, Fig. 1 is a sectional view of the main part, and Fig. 2 is a bottom view of the main part. It is.

1 is a base made by bending a rectangular flat plate into a short cross-sectional shape and having a sliding surface 1a, side walls 1b, and IC. A thin groove-like strip hole 2 provided therein and a through hole 3 for inserting an adjustment screw 6 (to be described later) are formed, and the through hole 3 has a groove 3a around it and a screw 6.
Make sure that the head does not protrude beyond the sliding surface 1a.

Attached to the lower surface of the base 1 is a support 4 for a planer blade 5 that is inclined downward from the lower edge of the strip 7L2.

That is, the support 4 is rotatable on the side walls 1b, lc of the base 1 via screws as support shafts 10a, 10b such that its tapered end surface 4a is opposed to the lower edge surface of the strip hole 2. A tongue piece 4b is bent at the lower end so as to be substantially parallel to the lower surface of the base 1, and a screw hole 4c is screwed into the tongue piece 4c at a position that coincides with the through hole 3 formed in the base 1. has been done.

After the spring 7 is interposed between the lower surface of the through hole 3 and the screw hole 4c, the adjustment screw 6 is inserted through the through hole 3 and screwed into the screw hole 4c.

The length of the spring 7 is adjusted so that the receiver 2 is resiliently retained on the base 1 even when the adjustment screw 6 is loosened to its maximum extent.

8 is a screw to tighten the planer blade 5 to the receiver 4; 9
A positioning pin 9 is engaged with a hole bored at a corresponding position in the receiver to prevent the planer blade from moving during use.

The planer blade 5 has a flat plate shape, and the cutting edge 5 is symmetrical on both the upper and lower sides.
a, 5b, and if the - side cutting edge wears out, cutting can be performed again by simply changing the planer blade back and forth.

Next, the operation of the present invention will be explained.

Figure 1 shows the state in which the planer blade 5 is most protruded with the adjustment screw 6 loosened the most. Now, when the adjustment screw 6 is gradually tightened, the support 4 will move counterclockwise around the support shafts 10a and 10b. Because of this rotation, the angle of the cutting edge of the planer blade 5 fixed to the receiver 4 changes, and at the same time, the length of the cutting edge protruding from the single groove 2 of the base can be adjusted.

In addition, in this embodiment, a spring 7 is interposed between the through hole 3 and the screw hole 4C to prevent the holder 4 from elastically, so that play (back crush) between the adjustment screw 6 and the screw hole 40 is prevented. Smooth cutting is possible without causing backlash in the cutting edge 5a.

The positions of the spindles 10 a and 10 b should be determined depending on the intended tool use, and the positions of the spindles 10 a and 10 b
Fine adjustment is possible by moving the position of b toward the cutting edge 2a, and coarse adjustment is possible by moving the position of the support shafts 10a and 10b toward the adjustment screw 6.

As described above, the present invention allows the protrusion length of the cutting edge to be easily adjusted at the same time as the angle of the cutting edge, and coarse adjustment and fine adjustment are also possible by determining the position of the spindle in accordance with the target tool.

In addition, the present invention has a spring interposed in the adjustment screw so that the holder is resiliently stopped by the base, so there is no play in the cutting edge during use, and the shock caused by the biting of the workpiece is absorbed by the spring. This can be reduced by the buffering effect of , allowing smooth cutting.

It has the same effect as the above.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a sectional view of the main part, and FIG. 2 is a bottom view of the main part. 1... Base, 2... Row hole, 4...
... Receiver, 5 ... Blade, 6 ... Adjustment screw, 7 ... Spring.

Claims (1)

[Scope of utility model registration request] A narrow groove-shaped hole is drilled on the base so as to be perpendicular to the cutting direction, and a metal plate is placed on the bottom surface of the base so that it slopes downward from the lower edge of the hole, and the both ends of the hole are It is pivotably supported on the side wall of the base, and its lower end is resiliently fixed to the base via an adjustment screw with a spring inserted, and furthermore, the support is provided with a cutting edge symmetrically on both the upper and lower sides on the back of the metal. A blade edge adjustment mechanism characterized by a flat blade having a shape formed thereon fixed in a replaceable manner.