JPH02245302A - Method for pinching cutting knife of knife holder and knife holder - Google Patents

Abstract

PURPOSE:To prevent cutting edge from displacing even when there is difference of hardness in surface to be machined by a method wherein a thin back blade is interposed between a plate-like cutting knife and a keep plate member so as to bring the back blade into close contact with the plate-like cutting knife by bending the back blade at clamping. CONSTITUTION:The swage face 23, which faces to an inclined face 12 side, of a plate-like cutting knife 21 is placed on the stepped part 15 of a cutting knife mounting plate 11 so as to fix to a back 22. Next, a back blade 31 is placed so as to cover the cutting knife 21 by fitting a flange 35 to a groove 16 and putting a cutting edge hold-down face 32 onto the cutting edge surface 25 of the plate-like cutting knife 21. The tip part of the rear cutting edge 34 of the back blade 31 strikes against the cutting edge hold-down face 32 and a gap is left between the remaining major part of the back blade 31 and the plate-like cutting knife 21. A keep plate 41 is replaced on the cutting knife mounting plate 11 so as to put the back 46 of the keep plate against the bearing face 18 of a flange 19 and put the tip against the back blade. Under the state just mentioned above, the cutting knife mounting plate 11 and the keep plate 41 are strongly clamped by a bolt. Through the clamping, the back blade 31 is warped, resulting in urging the cutting edge hold-down face 32 against the whole surface of the plate-like cutting knife without gap.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for holding a knife holder for a throw-away cutter for processing wood or similar materials, and to a knife holder suitable for a hand plane.

The conventional technique for holding a throw-away cutter for a finishing planer is, for example, the first method.
As shown in Figure 0, the knife 2 is positioned on the positioning step 1a of the knife mounting plate 1 of the knife holder, and the back blade 3 is applied so that the cutting edge line slightly protrudes and is fixed together with a clamping bolt. .

Problem to be Solved by the Invention The cutter 2 is placed on the blade clamping surface 4 of the cutter mounting plate l, and the step part 1a
In order to improve the adhesion between the tips of the blade 2 and the back blade 3, the back blade is provided with a slight clearance.

Therefore, the tip P of the blade attachment member I serves as a fulcrum, and a slight gap S is created between the peak side of the blade surface and the blade clamping surface 4 as shown in FIG. 10. If you feed the wood in the direction of the arrow and cut it in this state, there will be no problem with the finished surface in rough finishing, but the cutting allowance will be small in finishing cutting. The cutting edge has poor biting, and the knife 2 moves slightly in the direction of the arrow in the gap S on the peak side, causing the cutting edge to drop slightly, making it impossible to completely cut the knot, resulting in uncut portions that stand out and produce a beautiful finish. The problem arises that the surface cannot be obtained. When the blade 2 passes through the knot, it returns to its original state again and another gap S is created on the blade surface on the peak side, and the same process is repeated. The clamping method in which the back blade is brought into contact with the blade near the cutting edge line of the cutter has similar problems to a lesser extent.

The present invention was made in view of the problems of the conventional technology, and its purpose is to provide a tightening method that does not displace the cutting edge even due to differences in hardness of the cutting surface, and to provide a method for tightening hair follicles using this method. It is an object of the present invention to provide a suitable knife holder.

Means for Solving Problems vjA In order to achieve the above-mentioned object, the present invention provides a method for holding a plate-shaped knife between a knife mounting member and a holding plate member, in which a thin plate is attached between the plate-shaped knife and the holding plate member. The back blade plate is interposed and the back blade plate is curved during tightening, so that the back blade plate and the plate-shaped cutter are attached in the air.

Further, there is provided a step portion for positioning the plate-shaped cutter, a cutter mounting plate having a linear step or groove carved thereon that is inclined with respect to the cutting edge line direction of the plate-shaped cutter positioned on the step portion, and a thin back blade plate having a flange inclined at the same angle that holds down the plate-shaped cutter and engages with the step or groove; and a holding plate that deforms the back blade plate and press-fits it to the plate-shaped cutter and the cutter mounting plate. and a bolt for tightening the blade mounting plate and the retainer.

Operation claim I: A plate-shaped cutter is placed and positioned on the stepped portion of the cutter attachment member. Next, fit the retaining part of the back blade plate into the groove and lightly press the plate-shaped blade. Next, place the holding plate over the back blade plate and tighten with bolts.

Claim 2: A plate-shaped cutter is placed and positioned on the stepped portion of the cutter attachment member. Next, the inclined retaining portion of the back blade plate is engaged with the inclined groove. Furthermore, cover the holding plate over it and lightly tighten it, move the back blade plate in the direction of the inclination of the groove to adjust the position of the back blade line and the cutting edge line, and firmly tighten the holding plate to fix it.

An embodiment will be explained based on FIGS. 1 and 2. The blade mounting plate 11 has an inclined surface 12 at the tip of one side, and a blade clamping surface 14 formed on the opposite side 13 to be slightly shallower than the thickness of the plate-shaped blade 21, and a stepped portion 15 on which the peak 22 of the plate-shaped blade 21 comes into contact is formed. When the plate-shaped cutter 21 is attached, the cutting surface 23 is cut so that it is aligned with the inclined surface 12 or slightly protrudes from the inclined surface 12.

Further, in the surface I3, a groove 16 is cut parallel to the step portion 15 on the rear end side away from the step portion 15. Further, a flange 19 is formed at the rear end of the pressing plate crimping surface 17, which is one level higher than the surface 13, and has a side surface that rises perpendicularly to the pressing surface 17 and serves as a surface 18 for the holder of the pressing plate.

The back blade plate 31 is a thin plate that can be warped by pressing, and the surface opposite to the blade holding surface 32 is the back blade pressing surface 3.
3, its tip is formed into a back blade 34 having a slight width, and its rear end is formed into a flange 35 that is screwed into the groove 16. In the state where the back blade plate 31 is installed and before tightening, the blade holding surface 32 of the back blade plate 31 where the back blade 34 is in the retracted position from the cutting edge line 24 is such that a part of the back blade 34 is in contact with the plate-shaped cutter. The height of the flange 35 is determined so that the other surfaces in contact are narrow.

The retainer 41 has a back blade plate holding surface 42 that presses the back blade plate 3 at the tip, and a crimp surface 44 at the rear end, and a sliding surface 4 in the middle.
3, an inclined flank 45 is formed on the opposite side of the back blade plate retainer 42, and the rear end has a ridge 46 perpendicular to the crimp surface 44.
It is said that The blade mounting plate and the retainer are tightened with bolts (not shown).

To assemble this knife holder, place the edge 22 of the plate-shaped knife 21 on the stepped part 22 of the knife mounting plate 11 with the sloping surface 23 facing the inclined surface 12 and press the ridge 22. Next, cover the back blade plate 31, and insert the flange 35 into the groove 16. The blade holding surface 32 is placed on the blade surface 25 of the plate-shaped blade 21. In this state, as shown in FIG. 2, the blade holding surface 32 of the back blade plate 31 is in a state where the tip of the back blade 34 is in contact with most of it. For the uke, place the peak 46 of the holding plate on the first side and place the tip on the back blade plate. Then, the blade mounting plate 11 and the holding plate 4 are connected by bolts (not shown).
Tighten firmly. As a result of this tightening, the back blade plate 31 is warped, and the entire blade holding surface 32 is pressed against the plate-shaped blade surface without any gaps.

As shown in Fig. 3, the back blade plate is large enough to ride on the plate-shaped blade, and is usually curved so as to leave a gap in the center, and can be brought into close contact with the holding plate by tightening it.

A knife holder suitable for follicles will be explained based on FIGS. 4 to 9. Differences from the previous embodiment will be explained. Groove 5 into which the flange portion 56 of the back blade plate 55 of the blade mounting plate 51 fits
2 is cut at an angle with respect to the cutting edge line, and the flange 56 that fits therein is also formed at the same angle. Then, when the plate-shaped blade 59 is placed on the blade mounting plate 51 and the thin back blade plate 55 is assembled, each surface is adjusted so that the surface of the back blade plate 55 is almost the same surface as the holding plate mounting surface 57 of the blade mounting plate 51. is formed. Further, the cutter mounting plate 51 has a groove 58 cut parallel to the cutting edge line, in which the flange 62 of the holding plate 61 is fitted, without a flange portion.

To assemble this knife holder for follicles, use the knife attachment Fi.
Place the plate-shaped cutter 59 on the stepped portion of 51 and position it, and then
5, fit the inclined flange 56 into the inclined groove 52, and place the tip on the plate-shaped cutter 59.Next, fit the flange 62 of the holding plate 61 into the groove 58, and place the tip of the holding plate 61 on the back blade plate 55. Hold the blade mounting plate 51 with the bolt 63
Lightly tighten ff161. Move the back blade plate 55 in the direction of the inclined groove to adjust the amount of retraction of the back blade with respect to the cutting edge line, and tighten the bolt 63 strongly by warping the back blade plate 55 and crimping the blade with the entire blade holding surface of the back blade plate. let

Effects Since the present invention is constructed as described above, the present invention has the following effects.

In the method of claim 1, the back blade plate can be pressed and deformed with the holding plate, so there is no gap between the back blade plate and the plate-shaped blade, resulting in reliable crimping, and even if there is a difference in hardness at the cutting location, there is no biting due to movement of the blade edge. You can get a good finished surface without any unevenness. In addition, the close contact between the plate-shaped blade and the back blade plate prevents chips from entering.

In addition to the effects of claim 1, the knife holder of claim 2 allows for easy adjustment of the distance between the cutting edge line and the back blade, and can absorb manufacturing errors in the width direction of the knife.

[Brief explanation of drawings]

Figure 1 is a side view of the knife holder of the present invention after tightening;
The figure shows the state of the back blade plate before tightening, Figure 3 shows another example of the back blade plate, and Figure 4 shows the plate-shaped blade and the back blade on the blade attachment plate of the follicular knife holder. A plan view of the plate assembled, Fig. 5 is a side view of the same, Fig. 6 is a plan view of the back blade plate, Fig. 7 is a plan view of the holding plate, Fig. 8 is a side view of the same, Fig. 9 is a bolt. Figure 1 and Figure 1O are side views of a conventional knife holder. 11.51...Cutter mounting plate 21.59...Plate-shaped knife 31.55...Back blade plate 41.61...Press plate

Claims (2)

[Claims] (1) In a method in which a plate-shaped knife (21) is held between a knife attachment member (11) and a holding plate member (41), a thin back blade is placed between the plate-shaped knife (21) and the holding plate member (41). Board (
31), the back blade plate (31) is curved during tightening to bring the back blade plate and the plate-shaped blade into close contact with each other. (2) A step (53) for positioning the plate-shaped cutter (59) and a linear step or groove (52) inclined with respect to the cutting edge line direction of the plate-shaped cutter (59) positioned at the step. A thin plate having a blade mounting plate (51) carved with a blade and a flange (56) inclined at the same angle to hold a plate-shaped blade (59) positioned on the step (53) and engage with the step or groove. A back blade plate (55), a holding plate (61) that deforms the back blade plate (55) and press-fits it to the plate-shaped cutter, and a bolt (63) that tightens the cutter mounting plate and the holding plate. A knife holder characterized in that the position of the back blade relative to the cutting edge line can be adjusted by moving the back blade plate in the direction of an inclined step or groove.