JPH0788001B2 - Knife holder nipping method and knife holder - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for holding a knife holder of a throwaway blade for processing wood or similar material and a knife holder suitable for a hand plane.

Conventional technology The method of holding the throwaway blade for finishing plane is, for example, No. 10
As shown in the drawing, the blade 2 is positioned on the positioning step portion 1a of the blade mounting plate 1 of the knife holder, and the back blade 3 is abutted so that the edge line of the blade 2 slightly protrudes, and is sandwiched and fixed integrally by bolts.

The blade 2 is placed on the blade holding surface 4 of the blade mounting plate 1 and held by the back blade 3 while being positioned in the stepped portion 1a.
The back blade is provided with a slight back plow to improve the adhesion of the tip of the. Therefore, the tip P of the blade mounting plate 1 serves as a fulcrum, and a slight gap S is formed between the ridge side of the blade surface and the blade holding surface 4 as shown in FIG. When wood is fed and cut in the direction of the arrow in this state, there is no problem with the finished surface in rough finishing, but the cutting allowance is small in finish cutting.For example, when a cutting happens to have a joint, that portion is hard. The cutting edge is not well bited and the blade 2 slightly moves in the direction of the arrow in the gap S on the ridge side, and the cutting edge slightly drops, so the joint cannot be completely cut, and the joint can be left uncut, and its part is conspicuously finished surface. Will not be obtained. Then, the blade 2 returns to the original state again after passing through the node portion, and a gap S is formed again on the blade surface on the ridge side, and the same thing is repeated. In this way, the holding method in which the back blade is brought into contact with the blade near the cutting edge line has the same problem to some extent.

The present invention has been made in view of the above problems of the prior art, and its object is to provide a tightening method in which the cutting edge is not displaced even by the hardness difference of the cutting surface, and a hand plane using this method. It is intended to provide a suitable knife holder.

Means for Solving the Problems In order to achieve the above object, the present invention provides a method for clamping a pressing plate (41) on a blade mounting member to clamp a plate-shaped blade positioned on a blade clamping surface of the blade mounting member. In the above, a thin curvable back blade plate is interposed between the plate-shaped cutting tool and the pressing plate, and the back plate is curved by the pressing plate during tightening to bring the back blade plate and the plate-shaped cutting tool into close contact with each other and the blade holding surface. (1
It is configured so that there is no gap between 4) and the plate-shaped blade.

Further, a stepped portion for positioning the plate-shaped blade, a blade mounting plate having a linear step or groove inclined with respect to the cutting edge line direction of the plate-shaped blade positioned on the stepped portion, and the blade mounting plate positioned on the stepped portion. A thin back blade plate having a flange inclined at the same angle for pressing the plate-shaped blade and engaging with the step or groove, and a pressing plate for deforming the back blade plate and crimping the plate-shaped blade and the blade mounting plate And a bolt for tightening the blade mounting plate and the pressing plate.

Action Claim 1 ··· Positions a plate-shaped blade on the blade holding surface of the blade mounting member. Next, the flange of the back blade plate is fitted into the groove, and the plate-shaped blade is gently pressed. Next, the pressing plate is put on the back blade plate, and the back blade plate is bent by tightening the bolts.

Claim 2 ··· Positioning by placing a plate-shaped blade on the stepped portion of the blade mounting plate. The slanted flange of the back blade is then engaged with the slanted step or groove. Further, a pressing plate is placed on it and lightly tightened, and the back blade plate is moved in the direction of the step or the groove to adjust the positions of the back blade line and the cutting edge line, and the pressing plate is strongly tightened and fixed.

An embodiment will be described with reference to FIGS. 1 and 2. The blade mounting plate 11 has an inclined surface 12 at one end and a blade holding surface 14 formed on the opposite surface 13 thereof to be slightly shallower than the thickness of the plate-shaped blade 21, and the stepped portion 15 on which the ridge 22 of the plate-shaped blade 21 abuts. When the plate-shaped blade 21 is attached,
The relief surface 23 is cut so as to be aligned with the inclined surface 12 or slightly protruded. Moreover, a step is formed on the surface 13.
A groove 16 is formed in parallel with the step portion 15 on the rear end side apart from 15. Further, a flange 19 is formed at the rear end of the pressing plate crimping surface 17 one step higher than the surface 13 and having a side surface that rises at a right angle to the pressing surface 17 and serves as a receiving surface 18 of the pressing plate.

The back blade plate 31 is a thin plate that can be curved by pressing, and the surface opposite to the blade pressing surface 32 is the inclined surface of the back blade retraction surface 33, and its tip is formed on the back blade 34 having a slight width. The rear end is formed with a flange 35 that fits in the groove 16. Then, in the state before tightening with the back blade plate 31 assembled, the back blade 34 is at the retracted position from the cutting edge line 24, and the blade pressing surface 32 of the back blade plate 31 has a part of the back blade 34 side contacting the plate-shaped tool. The height of the flange 35 is determined such that the flange 35 is in contact with the other surface.

The pressing plate 41 is formed with a back blade plate pressing surface 42 that presses the back blade plate 31 at the front end, a crimping surface 44 at the rear end, and an intermediate surface 43 which is a relief surface inclined to the opposite surface of the back blade plate pressing surface 42. The surface 45 is formed, and the rear end is a peak 46 that is perpendicular to the crimping surface 44. The blade mounting plate and the pressing plate are tightened by bolts (not shown).

To assemble this knife holder, step 22 of the blade mounting plate 11
Mounted on the sloped surface 12 of the plate-shaped blade 21 is the slope 22
Crimp. Next, the back blade plate 31 is covered, the flange 35 is fitted into the groove 16, and the blade pressing 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 pressing surface 32 of the back blade plate 31 is in a state in which the tip of the back blade 34 hits the plate-like tool 21 and most of it is in a thin state. Next, the pressing plate 41 is placed on the blade mounting plate 11, and the ridge 46 of the pressing plate is applied to the receiving surface 18 of the flange 19, and the tip is applied to the back blade plate. Then, the blade mounting plate 11 and the pressing plate 41 are strongly tightened with bolts (not shown). By this tightening, the back blade plate 31 is curved, and the entire surface of the blade pressing surface 32 is pressed against the plate-shaped tool surface without a gap.

It should be noted that the back blade plate is sized to ride on a plate-shaped tool as shown in FIG. 3, and is usually curved so that a gap is formed in the central portion, and it is also possible that the back blade plate is brought into close contact with the pressing plate by tightening.

A knife holder suitable for a hand plane will be described with reference to FIGS. 4 to 9. Differences from the previous embodiment will be described. The groove 52 into which the flange portion 56 of the back blade plate 55 of the blade mounting plate 51 is fitted is formed so as to be inclined with respect to the cutting edge line, and the flange 56 fitted into this is also formed to have the same inclination. And the blade mounting plate 51
Each surface is formed so that when the plate-shaped blade 59 is mounted on the thin blade 55 and the thin blade 55 is assembled, the surface of the blade 55 is substantially flush with the pressing plate mounting surface 57 of the blade mounting plate 51. . Also, the blade mounting plate 51 has no flange part and the flange 62 of the pressing plate 61 is removed.
A groove 58 into which is fitted is cut parallel to the cutting edge line.

To assemble the knife holder for this plane, use the blade mounting plate 51
A plate-shaped blade 59 is placed on the stepped portion of the plate and positioned, a back blade plate 55 is covered, a slanted flange 56 is fitted in the slanted groove 52, and the tip is mounted on the plate-shaped blade 59. Next, the flange 62 of the pressing plate 61 is inserted into the groove 58.
And the tip of the pressing plate 61 is placed on the back blade plate 55, and the blade mounting plate 51 and the pressing plate 61 are lightly tightened with bolts 63. Move the back blade plate 55 in the direction of the inclined groove to adjust the retreat amount of the back blade with respect to the cutting edge line, strongly tighten the bolt 63 and bend the back blade plate 55 to crimp the tool on the entire blade holding surface of the back blade plate. .

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

According to the method of claim 1, since the back blade plate can be curved by the pressing plate, a reliable pressure bonding without a gap between the plate-shaped blade and the blade holding surface can be achieved, and the blade edge of A good finished surface can be obtained by eliminating uneven biting due to movement. Further, the close contact between the plate-shaped blade and the back blade plate prevents chips from entering.

In addition to the effect of claim 1, the knife holder of claim 2 can easily adjust the distance between the blade tip line and the back blade, and can absorb a manufacturing error in the width direction of the tool.

[Brief description of drawings]

FIG. 1 is a side view of the knife holder of the present invention after tightening, and FIG.
The figure shows the state of the back blade plate before tightening, FIG. 3 shows another embodiment of the back blade plate, and FIG. 4 shows the plate-shaped blade and the back blade on the blade mounting plate of the knife holder of the hand plane. FIG. 5 is a plan view of the back blade plate, FIG. 7 is a plan view of the pressing plate, FIG. 8 is the same side view, and FIG. 9 is a bolt. Figure, number
FIG. 10 is a side view of a conventional knife holder. 11,51 …… Blade mounting plate 21,59 …… Plate-shaped blade 31,55 …… Back blade plate 41,61 …… Pressing plate

Claims (2)

[Claims] 1. A method for holding a plate-shaped blade (21) positioned on a blade holding surface (14) of the blade mounting member by tightening a pressing plate (41) on the blade mounting member, the plate-shaped blade (21). A thin curving back blade plate (31) is interposed between the pressing plate (41) and the pressing plate (41), and the back blade plate (31) is curved by the pressing plate (41) at the time of tightening so that the back blade plate and the plate shape. A knife holding method for a knife holder, characterized in that the blade holding surface (14) and the plate holding tool are closely contacted with each other and a gap is not formed between the plate holding tool and the blade holding surface. 2. A step portion (53) for positioning a plate-like blade (59).
A blade mounting plate (51) in which a linear step or groove (52) inclined with respect to the cutting edge line direction of the plate-shaped blade (59) positioned on the step is engraved, and the step (53) ) A thin back blade plate (55) having a flange (56) inclined at the same angle for holding the plate-shaped blade (59) positioned in () and engaging with the step or groove, and the back blade plate (55). A pressing plate (61) for deforming and crimping to the plate-like blade, and a bolt (63) for tightening the blade mounting plate and the pressing plate, and moving the back blade plate in an inclined step or groove direction. The knife holder is characterized in that the position of the back blade with respect to the cutting edge line can be adjusted by.