JPH04331102A - Rotary blade for planer - Google Patents

Abstract

PURPOSE:To obtain the rotary blade for a planer which has light weight, sufficient cutting depth and less vibration or noise. CONSTITUTION:The arms 5, 5 inclined in one direction are provided at the same distance along the directional lines 2 of a plurality of screws are provided on the outer peripheral surface of a cylinder 1, and cutting blades 6 are provided on the tips of said arms 5, 5. A plurality of the initial ends 3, 3' and a plurality of the final ends 4, 4' of the directional lines 2 are provided in the same plane on the side of the initial ends 3, 3' and the side of the final ends 4, 4' perpendicular to the central line c of the cylinder 1. A plurality of the initial ends 3, 3' and a plurality of the final ends 4, 4' are provided in positions symmetrical to the center line c.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary blade used in a planer for woodworking.

0002

[Prior Art] A rotary blade used in a conventional wood planer has four long horizontal blades on the outer peripheral surface of a cylinder, which are approximately parallel to the center line of the cylinder and have the same length as the width of the cylinder. The opening angle between the blade and the horizontal blade was 90 degrees.

[0003] Therefore, the cutting force is large and the cutting depth is approximately 2 m.
There were problems in that the cutting blades were small, about 1.5 m, and the spacing between the cutting blades was large, resulting in heavy weight, poor dynamic balance, and high cutting noise.

0004

[Problems to be Solved by the Invention] The present invention aims to provide a rotary blade for a planer that has low cutting resistance, a large cutting depth (approximately 10 mm), is lightweight, and has low cutting noise. purpose.

[0005]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a plurality of spirals on the outer peripheral surface of a cylinder that are inclined in a direction from the starting end to the terminal end of the multi-thread spiral along each direction line of the multi-thread spiral. Arms are protruded at equal intervals, cutting blades are provided at the tips of the arms in the rake angle direction, and the opening angle between the plurality of starting ends and the center line of the cylinder is constant and lies in the same plane orthogonal to the center line. ,
and the opening angle between the plurality of terminal ends and the center line is constant and lies in the same plane parallel to the plane, and the starting end and the terminal end are arranged at symmetrical positions with respect to the center line. The rotary blade for a plane board according to the invention, wherein the plurality of threads of the rotary blade are a two-thread spiral; Alternatively, the rotary blade cylinder for a planer according to the second invention is hollow and has boss portions at both ends, and the inner diameter of the hollow portion is larger than the inner diameter of the boss portion, respectively. It is composed of the rotary blade for planer described above.

[0006]

[Operation] In the present invention, the plate 10 is supported on a plane board, and the cylinder 1 is rotated singly or in combination to cut the surface, bottom and both sides of the plate 10, singly or simultaneously, into the cutting blades 6 at the ends of the arms 5. It can be cut by.

[0007] The cutting blade 6 has arms 5 protruding at equal intervals along the direction lines 2, 2 of the multi-filament spiral and inclined in the direction of the direction lines 2, 2 (from the starting end side to the terminal end side). Since it is provided at the tip, it is sequentially cut by a large number of narrow cutting blades 6, 6, so cutting resistance is applied to the narrow cutting blades 6 in sequence, so the cutting resistance is reduced and the cutting depth is relatively deep. cut into.

Further, the opening angle β between the plurality of starting ends 3, 3' of each direction line 2 of the multi-filament spiral and the center line c of the cylinder 1 is constant, and the starting ends 3, 3' are orthogonal to the center line c. are in the same plane, and the opening angle β between the plurality of terminal ends 4, 4' and the center line c is also constant, and is in a plane parallel to the plane, and the starting ends 3, 3' and the terminal ends 4, 4. ' is arranged at a symmetrical position with the center line c as the center, so the center line c
The rotational balance (dynamic balance) around the center is well maintained, so there is little cutting noise, and since the cutting blades 6 are provided at the tips of the many arms 5, the weight is light. Furthermore, since the inner diameter D of the hollow portion is larger than the inner diameter d of the boss portion, the weight is further reduced.

[0009]

[Embodiment] A plurality of arms 5, 5 which are inclined to one side along the respective direction lines 2, 2 of a multi-filament spiral (two-filament spiral in Fig. 1) are protruded from the outer peripheral surface of the hollow cylinder 1 at equal intervals. . The inclination direction is from the starting end 3, 3' of the direction lines 2, 2, respectively to the terminal end 4,
4', and the equal spacing is determined by keeping the opening angle β' between the arms 5, 5 and the center line c of the cylinder 1 constant; in FIGS. 1 and 2, the opening angle β' is 30 degrees. At the tip of the arm 5, right-angled blade receiving surfaces 8, 8 shown in FIG. 4 or acute-angled blade receiving surfaces 9, 9 shown in FIG. 5 are formed at the tip of the arm 5, and in FIG. However, in FIG. 5, the cutting blade 6 is fixed to the tip of the arm 5 in the direction of the rake angle α by brazing that part while holding the acute angle base.

The opening angle β between the plurality of starting ends 3, 3' and the center line c of the cylinder 1 is constant (180 degrees in FIG. 2), and the starting ends 3, 3' are perpendicular to the center line c. Provided within the same plane. Further, the opening angle β between the plurality of terminal ends 4, 4' and the center line c is also constant (180 degrees) and is provided in the same plane parallel to the above plane, and the plurality of starting ends 3, 3' and the terminal end 4 are , 4' are arranged at symmetrical positions about the center line c.

The inner diameter D of the hollow cylinder 1 is larger than the inner diameter d of the boss portions 7, 7 provided at both ends of the cylinder 1 (see FIG. 6). As shown in FIG. 3, the cutting edge 6' of the cutting blade 6 is perpendicular to the rotation direction a, and the width of the cutting edge 6' is larger than the width of the base. The equally spaced parts of the arms 5, 5 are arranged in parallel in the same direction as the center line c, as seen in FIGS. 1 and 2.

0012

[Effects of the Invention] Since the present invention is constructed as described above, the overall weight of the rotary blade for a planer is reduced, and not only is the rotational balance good, but the cutting resistance is small and the cutting depth is about 10 mm. Not only is cutting possible, but it also has the effect of reducing vibration and cutting noise.

[Brief explanation of drawings]

FIG. 1 is a front view showing a rotary blade for a planer according to the present invention.

FIG. 2 is a left side view of FIG. 1.

FIG. 3 is an enlarged front view of the cutting blade taken along line A-A in FIG.

FIG. 4 is a side view of the cutting blade in a state where it is mounted at right angles.

FIG. 5 is a side view of the cutting blade in a state where it is attached at an acute angle.

FIG. 6 is a partial longitudinal sectional view of a cylinder.

[Explanation of symbols]

1 Cylinder 2 Direction line 3, 3' starting end 4, 4’ end 5 Arm 6 Cutting blade α Rake angle c Center line β, β’ Opening angle 7 Boss part D, d Inner diameter

Claims (4)

[Claims] Claim 1: A plurality of arms protruding from the outer circumferential surface of the cylinder at equal intervals along each direction line of the multi-thread spiral in a direction from the starting end to the terminal end of the direction line, and at the tip of the arm. The cutting blade is provided in the rake angle direction, the opening angle between the plurality of starting ends and the center line of the cylinder is constant and lies in the same plane orthogonal to the center line, and the opening angle between the plurality of ending ends and the center line is constant. A rotary blade for a plane board, wherein the starting end and the ending end are arranged in symmetrical positions with respect to the center line, and the starting end and the ending end are located in the same plane parallel to the above-mentioned plane. [Claim 2] A claim in which the multiple thread spiral is a two thread spiral (
1) Rotary blade for plane board as described. 3. The rotary blade for a plane board according to claim 1, wherein the plurality of arms are equally spaced so that the opening angle between the arms is 30 degrees with respect to the center line. 4. The planer according to claim 1, 2, or 3, wherein the cylinder is hollow and has boss portions at both ends, and the inner diameter of the hollow portion is larger than the inner diameter of the boss portion. Rotary blade for use.