JP3755279B2 - Planer board - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a blade fixing device that can adjust the protrusion amount of a blade of a blade fixing device that fixes the blade by centrifugal force.
[0002]
[Prior art]
The prior art will be described with reference to FIG. There is a registered utility model No. 2539906 in a conventional blade fixing device.
[0003]
A concave blade storage groove 12 having a narrow opening in the outer peripheral direction is provided on the outer periphery of the planer cylinder 11, and the blade 13, the back blade 14 holding the blade 13 in the blade storage groove 12, and the centrifugal contact with the back blade 14. A fixing plate 15 is provided, and an adjustment screw 17 is passed through the back blade 14, and is screwed to the bottom surface 12 c of the blade storing groove 12. Further, the back blade 14 is biased in the outer peripheral direction by a spring 18 provided on the outer periphery of the adjustment screw 17, the counterbore surface 14 d of the back blade 14 abuts on the head of the adjustment screw 17, and the set height of the blade 13 is positioned. Is done.
[0004]
The blade 13 is fixed by inserting the back blade 14 and screwing the adjusting screw 16 to the bottom surface 12c to attach the blade 13. The counterbore surface 14 d of the back blade 14 abuts against the head of the adjustment screw 16 by the spring 18. The centrifugal fixing plate 15 is pushed up by the spring 16, and the centrifugal fixing plate 15 presses the back blade 14 toward the blade 13, and the blade 13 is temporarily fixed. In this state, the protruding amount of the blade 13 protruding from the planer cylinder 11 is adjusted by moving the adjustment screw 17 back and forth and moving it up and down.
[0005]
To adjust the protruding amount of the cutter 13, the planer cylinder 11 is positioned by an indexing device (not shown), and a gauge 20 is attached to a reference surface 19 of the planer (not shown). Next, the adjusting screw 17 is adjusted by turning so that the cutting edge of the blade 13 is in contact with the lower surface of the gauge 20. After that, after the cutter body 11 is rotated to fix the blade 13, the height of the blade edge is measured with a dial gauge from the reference surface 19, and if the protrusion amount at the left and right ends of the blade 13 is large, the above operation is repeated again. Adjusted.
[0006]
[Problems to be solved by the invention]
In the prior art, in order to remove the chips adhering to the back blade 14, when the back blade 14 is removed from the planer cylinder 11, the adjusting screw 17 must be removed. Therefore, when attaching the back blade 14 to the planer cylinder 11, the above-described adjustment screw 17 must be adjusted again, which is very troublesome and greatly reduces the work efficiency.
[0007]
The objective of this invention is providing the blade fixing device which eliminates the trouble of the above-mentioned prior art and makes readjustment unnecessary.
[0008]
[Means for Solving the Problems]
The object is to provide a plurality of blade storage grooves formed in the axial direction of the plane, a back blade stored in the blade storage groove, a centrifugal fixing plate, and a spring for biasing the centrifugal fixing plate in the outer peripheral direction. And the blade is pressed against and fixed by the centrifugal force of the centrifugal fixing plate through the back blade, and the blade storage groove is opposed to the first side surface and the first side surface. A second side surface that is inclined in a direction that becomes narrower toward the opening portion of the outer peripheral surface of the body and a reference surface that comes into contact with the bottom surface of the back blade, and the centrifugal fixing plate is directed to the opening portion of the blade storing groove. A pair of opposing slopes whose mutual distance decreases with each other, one slope contacting the second side surface and the other slope contacting the back blade, and the back blade contacts the centrifugal fixing plate A surface, an engagement portion that engages with the back surface of the blade, and the first side of the blade storage groove. And an adjustment screw capable of contacting the reference surface is screwed to the back blade, and the first blade is configured to have a surface facing the reference surface and a bottom surface that contacts the reference surface of the blade storing groove. An angle θ1 formed by the side surface and the inclined surface of the centrifugal fixing plate that is in contact with the back blade is an acute angle having an apex in the outer circumferential direction of the planer cylinder, and the angle θ1 and the angle θ2 of the pair of opposing inclined surfaces of the centrifugal fixing plate are This is achieved by making the relationship θ1 <θ2.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a sectional view of a planer cylinder, FIG. 2 is a partial sectional view showing a state in which the centrifugal fixing plate is pushed down in FIG. 1 and a blade is taken out, and FIG. 3 is a partial sectional view showing a state in which the fixing plate is removed.
[0010]
In the drawing, a plurality (two in the present embodiment) of blade storage grooves 2 are formed on the outer periphery in the axial direction of the planer cylinder 1. The blade storage groove 2 faces the first side surface 2a and the first side surface 2a, and the inclination of the gap between the first side surface 2a becomes narrower from the axial center of the planer cylinder 1 toward the opening 2e on the outer peripheral surface. It has a second side surface 2b having a surface, a reference surface 2c, and a bottom surface 2d that is one step lower than the reference surface 2c, and is formed in a substantially concave shape. The first side surface 2a and the reference surface 2c, and the second side surface 2b and the bottom surface 2d are formed at right angles.
[0011]
In the blade storing groove 2, a blade 3, a back blade 4 that holds the blade 3, and a centrifugal fixing plate 5 that contacts the back blade 4 are provided. The blade 3 is in contact with the first side surface 2a. The back blade 4 is in contact with the engagement groove 3a on the back surface of the blade 3, and engages 4a for positioning the blade 3. The lower surface 4b is opposed to the first side surface 2a. The bottom surface 4c is in contact with the reference surface 2c. 3d, and a convex part 4e that comes into contact with a concave part 5c of a centrifugal fixing plate 5 described later at a predetermined position. The centrifugal fixing plate 5 has a pair of inclined surfaces 5a and 5b that become smaller in distance from each other toward the opening 2e. One inclined surface 5a slidably contacts the back blade 4, and the other inclined surface 5b is a second side surface. 2b. A spring 6 is disposed between the bottom surface of the centrifugal fixing plate 5 and the bottom surface 2d and urges the centrifugal fixing plate 5 to jump out in the outer peripheral direction of the planer cylinder 1.
[0012]
In order to form the back blade 4 in the vertical direction, a plurality of adjusting screws 7 are screwed on the threaded portion 4f and abut against the reference surface 2c. The adjustment screw 7 protrudes from the bottom surface 4c of the back blade 4. When the adjustment screw 7 is turned clockwise, the amount of protrusion from the bottom surface 4c of the back blade 4 increases. The protruding amount of becomes smaller. The protruding amount of the blade 3 is defined by the protruding amount of the adjusting screw 7 and the dimension from the reference surface 2c.
[0013]
The back blade back angle θ1 (the angle formed by the first side surface 2a and the inclined surface 5a of the centrifugal fixing plate 5) is an acute angle having an apex in the outer circumferential direction, and the back blade back angle θ1 and the centrifugal fixing plate back angle θ2 (centrifugal fixing) The angle of the pair of inclined surfaces 5a and 5b of the plate 5 is such that when the centrifugal fixing plate 5 jumps outward by the centrifugal force of the centrifugal fixing plate 5, the centrifugal fixing plate 5 makes the back blade 4 side the reference surface 2c side and the blade 3 The relationship between θ1 and θ2 is set to θ1 <θ2 so as to press toward the side.
[0014]
In the above configuration, a method for attaching and removing the blade 3 will be described. First, when removing the cutter 3 from the planer cylinder 1, as shown in FIG. 2, when the centrifugal fixing plate 5 is pushed down, the concave portion 5 c of the centrifugal fixing plate 5 and the convex portion 4 e of the back blade 4 come into contact with each other. Is inclined toward the centrifugal fixing plate 5 side. Thereby, a clearance gap is made between the back blade 4 and the first side surface 2a, and the blade 3 can be removed in this state. As shown in FIG. 3, when the back blade 4 is removed from the planer cylinder 1, as shown in FIG. 3, the back blade 4 is moved toward the first side face 2a and taken out in the outer circumferential direction.
[0015]
When attaching the blade 3, as shown in FIG. 2, when the centrifugal fixing plate 5 is pushed down, the concave portion 5c and the convex portion 4e of the centrifugal fixing plate 5 come into contact with each other, and the back blade 4 tilts from the space with the first side surface 2a. The engagement groove 3a of the blade 3 is attached to the engagement portion 4a. The centrifugal fixing plate 5 is pushed up by a spring 6, and the centrifugal fixing plate 5 presses the back blade 4 against the first side surface 2 a side and the reference surface 2 c side, so that the back blade 4 returns to its original position. There is no gap between the first side surface 2a and the blade 3 is temporarily fixed. Attach the gauge to the reference surface (table) of the planer board (not shown). Next, the adjustment screw 6 is turned and adjusted so that the blade edge of the blade 3 is in contact with the lower surface of the gauge. Finally, when the planer cylinder 1 is attached to the planer body and the planer cylinder 1 is rotated, the centrifugal fixing plate 5 is further ejected toward the outer periphery of the planer barrel 1 by centrifugal force, whereby the centrifugal fixing plate 5 is further back. The blade 4 is pressed to the first side surface 2 a side, the adjustment screw 7 is pressed to the reference surface 2 c side, and the blade 3 is completely fixed at a predetermined position via the back blade 4. Once the back blade 4 is adjusted, readjustment can be made unnecessary even if the back blade 4 is removed.
[0016]
【The invention's effect】
According to the present invention, the back blade is pressed against the reference surface of the blade storage groove, and the amount of protrusion is adjusted with an adjusting screw screwed on the back blade, so that the back blade can be removed from the planer cylinder and reattached. The protrusion amount of the blade does not change, and once the protrusion amount is adjusted, readjustment can be made unnecessary.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a planer cylinder showing an embodiment of the present invention.
FIG. 2 is a partial cross-sectional view of a planer cylinder showing a state in which a blade is attached and removed.
FIG. 3 is a partial cross-sectional view of a planer cylinder showing a state where a back blade is removed.
FIG. 4 is a sectional view of a planer cylinder showing the prior art.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Plane body, 3 ... Cutting tool, 4 ... Back blade, 4f ... Female thread part, 5 ... Centrifugal fixing plate, 7 ... Adjustment screw.

Claims (1)

  A plurality of blade storage grooves formed in the axial direction of the planer drum, a back blade stored in the blade storage groove, a centrifugal fixing plate, and a spring for urging the centrifugal fixing plate in the outer circumferential direction; The blade is pressed and fixed by the centrifugal force of the centrifugal fixing plate through the back blade, and the blade storage groove has a first side surface and an outer peripheral surface of the barrel facing the first side surface. A second side surface that is inclined in a direction that becomes narrower toward the opening of the blade, and a reference surface that contacts the bottom surface of the back blade, and the centrifugal fixing plate has a mutual interval toward the opening of the blade storing groove. A pair of smaller opposing slopes, having one slope contacting the second side surface and the other slope contacting the back blade, the back blade contacting the centrifugal fixing plate, An engaging portion that engages with the back surface of the blade and the first side surface of the blade storage groove. And a cutting board having a bottom surface that comes into contact with the reference surface of the blade storing groove, and an adjustment screw that can contact the reference surface is screwed to the back blade, and the first side surface and the back blade An angle θ1 formed with the inclined surface of the centrifugal fixing plate in contact with the angle is defined as an acute angle having an apex in the outer peripheral direction of the cylinder barrel, and the relationship between the angle θ1 and the angle θ2 of the pair of opposed inclined surfaces of the centrifugal fixing plate Planer board characterized by θ2.

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