JPH0228013Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a knife holder for a super-finishing plane blade used to smoothen the wooden surface of architectural boards, fittings, etc.

Prior Art A knife holder that holds the upper surface of a knife stock in a super-finishing plane machine for woodworking, such as Utility Model Publication No. 59-1767, allows the plane blade to be replaced. It is considered. The planer blade mounting plate of the knife holder is configured such that the cutting edge of the planer blade protrudes by a predetermined amount, and the back blade is attached at a predetermined retreat amount with respect to the cutting edge line of the planer blade. However, experience has taught us that the optimum amount of retraction is appropriate for the cutting conditions.
It is preferable to set the amount of retraction of the cutting edge line of the back blade to an optimal value according to the type of finishing and the material of the workpiece.

Taking this point into consideration, the applicant first filed a patent application in 1983-
In No. 31280, the planer blade is provided with an engagement positioning part that is slightly inclined to the cutting edge line, and the back blade is provided with a counterpart engagement positioning part that corresponds to the engagement positioning part,
We are proposing a plane blade in which the amount of retraction of the back blade can be adjusted by shifting the plane blade in the longitudinal direction.

Problems that the invention aims to solve: In order to determine the amount of retraction of the back blade that suits the cutting conditions, it is generally necessary to rely on intuition while checking the parallelism of the cutting edge line of the planer blade and the cutting edge line of the back blade, and install it extremely carefully. was. In addition, in the previous proposal, the plane blade is determined by a vertical reference plane, and the back blade is positioned on the plane blade mounting plate by a positioning pin, so that the amount of retraction of the back blade from the plane blade edge line is fixed. , cannot be adjusted. Also, in the later proposal, it was necessary to increase the width of the plane blade to some extent.

Means for Solving the Problem A convex portion 14 is provided on the planer blade mounting plate 11 to receive the peak surface 26 of the back blade 22, and the receiving surface 15 of the convex portion is inclined with respect to the cutting edge line 21 of the planer blade 17 held therebetween. The peak surface 26 of the back blade 22 is formed as a surface inclined at the same angle and in the opposite direction to the receiving surface 15, and by shifting the back blade in the longitudinal direction, the back edge of the plane blade 22 is The amount of retraction m of the cutting edge line can be adjusted.

Embodiments Hereinafter, embodiments of the present invention will be described based on the drawings. A well-known super-finishing planer has a feeding mechanism that feeds the material horizontally.A blade opening for regulating the cutting thickness is fixed to the window of the knife stock provided in the main body of the plane, and the plane blade is held opposite the blade opening. A knife holder H is attached. The plane blade mounting plate 11 of this knife holder H has a light end on one side as an inclined surface 12, and the opposite side has a blade clamping surface 13 that is slightly shallower than the thickness of the plane blade 17 and has a stepped portion on which the peak 18 of the plane blade 17 comes into contact. When the plane blade 17 is attached, its cutting surface 1
9 is cut so that it is aligned with the inclined surface 12 or slightly protrudes, and the rear end has a convex side surface that becomes the back blade receiving surface 15 that stands up at a right angle from the crimp surface 16 of the back blade 22. A portion 14 is formed. The back blade receiving surface 15 is sloped at an angle α in the longitudinal direction. In addition, the back blade 22 of the knife holder H has an inclined surface 24 on the opposite side of the blade holding surface 23, and its tip has a slight back blade cutting edge 25 with a blade angle of 70 to 90 degrees. The peak surface 26 that is formed and continues to the attachment plate crimping surface 34 on the other end side has a slope in the opposite direction that is equal to the slope angle α of the receiving surface 15 of the convex portion 14 of the plane blade attachment plate 11.
By moving the plane blade in the longitudinal direction, the back blade edge line retreats by a predetermined amount m from the plane blade edge line 21.
It can be adjusted within the range of 0.15-0.5mm. It is convenient to arrange so that when the side edge of the back blade 22 coincides with the side edge of the planer blade attachment plate 11, the retraction amount for finishing cutting is m. In addition, square grooves 27 are cut in the blade holding surface 23 of the back blade 22 over the entire length in the longitudinal direction toward the peak of the plane blade 17 received by the blade clamping surface 13, and within the square grooves 27, there are several square grooves 27 at equal intervals. A tapped hole 29 into which a set bolt 28 is embedded is provided. A plane blade presser piece having the same length as the back blade 22 is inserted into the square groove 27. The plane blade mounting plate 11 has tapped holes 31 at several locations in the longitudinal direction at the center of the width.
is engraved, and an elongated hole 32 is bored in the back blade 22 at a position corresponding to the tap hole 31 to enable movement and adjustment of the back blade in the longitudinal direction, and the planer blade 17 is clamped and tightened with a tightening bolt 33.

Function To attach the plane blade 17 to the knife holder H,
With the blade clamping surface 13 of the plane blade attachment plate 11 as the top surface, wipe off dirt along with the back blade crimp surface 16 and receiving surface 15, and place the blade surface 20 of the plane blade 17 with the crimp surface wiped off on the blade clamping surface 13, and step the peak 18. The cutting edge line 21 is fixed by crimping the blade. Wipe the dirt on the blade holding surface 23 of the back blade 22, the mounting plate crimping surface 34, and the slope peak surface 26, place the set bolt 28 over it so that the tip is not exposed, and then use a plane from the side of the square groove 27. Insert the blade retainer 30 gently so that the plane blade 17 does not move. Lightly tighten the tightening bolt 33 and adjust the back blade 22 in the longitudinal direction to remove the plane blade 17.
Adjust so that the back blade edge 25 is normally about 0.3 mm backwards by 0.15 to 0.2 mm for finish cutting, and then tighten the tightening bolts 33 evenly in order to uniformly hold down the plane blade holding piece 30. Eliminate floating. The knife holder H, in which the plane blade 17 and the back blade 22 are integrally fixed to the plane blade mounting plate 11 in this manner, is attached to a knife stock of a plane board.

Effects As detailed above, the present invention has a convex part on the planer blade mounting plate, and the receiving surface of the ridge of the back blade is formed to be inclined with respect to the cutting edge line. Since the blades are assembled at an inclination, it is possible to easily adjust the amount of retraction of the cutting edge line of the back blade with respect to the cutting edge line of the planer blade to the optimum value that matches the cutting conditions. Adjustment becomes even easier when reference lines and scales are provided on the plane blade attachment plate and the back blade, respectively.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of the knife holder of the present invention, Figure 2 (a) is a front view of the plane blade mounting plate, and (b) is a side view of the same.
Figure 3 A is the front view of the back blade, B is the same side view, Figure 4 is a perspective view of the plane blade, and Figure 5 is a diagram of the plane blade mounting plate and back blade aligned and sandwiching the plane blade. Front view B is a side view. 11... Planer blade mounting plate, 13... Blade clamping surface,
14... Convex portion, 15... Receiving surface, 17... Planer blade,
22...Ura-blade, 26...Ura-blade peak.

Claims (1)

[Scope of utility model registration request] In a knife holder attached to a knife stock of a planer, the planer blade attachment plate is provided with a convex portion for receiving the peak surface of the back blade, and the receiving surface of the convex portion is formed into a surface inclined with respect to the cutting edge line of the held planer blade. , the peak surface of the back blade is formed as a sloped surface at the same angle and in the opposite direction to the receiving surface, and by shifting the back blade in the longitudinal direction, the amount of retraction of the back blade edge line with respect to the planer blade edge line is adjusted. A knife holder for super-finished plane blades for woodworking.