JPH0976204A - Split cutting type plane - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To provide a split-cutting type hosel which facilitates replacement of a replacement blade and shortens a time required for replacement of the replacement blade. SOLUTION: A spare blade 2 in which a cutting edge portion 2d and a cutting edge lacking portion 2e are alternately formed in a cutting groove formed in the outer periphery of a plane body 1 in the rotation axis direction, and a cutting edge line is discontinuous, The position in the rotation axis direction is regulated by the zigzag-fixed stoppers 3 on the ring 4A side and the ring 4B side in each blade groove so that the cutting area of the cutting edge portion 2d on the front side of rotation and the cutting edge portion 2d on the rear side thereof are different. Place and fix. Therefore, it is only necessary to replace one spare blade 2 for each blade groove, and the spare blade replacement time can be shortened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a woodworking plane for cutting planes such as wood, wood-based materials and synthetic resins.

[0002]

2. Description of the Related Art A knuckle body having a structure in which a plurality of blade grooves parallel to the rotation axis are formed on the outer periphery of a cylindrical hood body and a replaceable blade is detachably mounted in the blade groove is shown in FIG. is there. This is a plurality of blade grooves 102 in the axial direction of the plane body 101.
A plurality of spare blades 1 short in the cutting width direction on the tip seat 102a
No. 03 is mounted, and the plane forming cutting is performed so that the cutting regions of the spare blades before and after the rotation direction are different.
In addition, FIG. 10C is a diagram arranged in a developed view for explaining the arrangement state of the spare blade.

[0003]

Since the plane body described in the prior art has a structure in which a large number of spare blades are mounted, it has a problem that it takes an excessive amount of time to replace the spare blades. The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to provide a plane member in which replacement blades can be easily replaced and the time required for replacement can be shortened. Is.

[0004]

In order to achieve the above object, the plane of claim 1 has a plurality of cutter grooves formed on the outer periphery of a cylindrical plane main body over the effective cutting length in parallel to the rotation axis. In the plane where the spare blades are detachably attached one by one,
Replacement blades mounted in the plurality of tool grooves are formed to have a shorter size and the same size as the effective cutting length of the plane body, and the position in the rotation axis direction is regulated by at least one stopper, and the front and rear are in the rotation direction. The replacement blades are arranged so that the cutting regions are different from each other.

In this plane, replaceable blades of the same size and shape shorter than the effective cutting length are arranged by stoppers on one side or both sides so that the front and rear blades in the rotating direction have different cutting areas. Only the replacement is required, and the replacement blade replacement time can be shortened.

In the plane of the plane of the present invention, a spare blade is detachably attached to each of a plurality of blade grooves formed on the outer periphery of a cylindrical main body over the effective cutting length in parallel with the rotation axis. In the plane, the replacement blade mounted in the plurality of blade grooves is shorter than the effective cutting length of the plane and has the same size and shape,
A cutting edge portion and a cutting edge missing portion are alternately provided to form a discontinuous cutting edge line, the position in the rotation axis direction is regulated by at least one stopper, and the cutting areas of the cutting edge portion before and after the rotation direction are different from each other. It is arranged as follows.

Since this plane has a plurality of blade tips and blade tip missing portions on one blade, it is possible to freely set a divided cutting pattern with the minimum number of blades. The replacement blade replacement time can be shortened by only replacing the minimum number of replacement blades regardless of the number of cuts.

In the plane of the plane of the present invention, the blade tip missing portions of the spare blade are provided at equal pitches, and the spiral groove shallower than the tool groove is provided on the outer periphery of the plane body so as to be continuous with the blade tip missing portions of the equal pitch. It is a thing. Therefore, in this plane, the outer diameter difference between the blade tip missing portion and the plane behind the rotation is reduced, so that the turbulence of the air during rotation can be reduced and the noise during rotation can be reduced. it can.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below for each embodiment with reference to the drawings. [Embodiment 1] A split cutting type plane cylinder of Embodiment 1 will be described with reference to FIGS. As shown in FIG. 4, a blade groove is formed over the circumference of the plane main body 1 at approximately four equally divided positions over the width of the plane in the axial direction, and the spare blade 2 can be attached to and detached from the blade groove by centrifugal fixing means described later. Is attached to.

In the blade groove, as shown in FIG. 5, the first side surface 1a on the rear side of rotation is a surface on which the surface 2a of the spare blade 2 comes into contact, and the rake angle of the spare blade 2 is 20 to 30 degrees. Is inclined with respect to the diameter line. The second front side surface 1b facing the first side surface 1a is parallel to the first side surface 1a, and the bottom surface 1c is perpendicular to the first side surface 1a and the second side surface 1b.

As shown in FIG. 1, the spare blade 2 is shorter than the effective cutting length (cylinder width) of the plane body 1, and both side edges of the back surface 2b are formed with parallel cutting edges, and the front surface 2a and the back surface 2b are parallel to each other. Then, the trapezoidal engaging concave portion 2 that engages with the engaging convex portion 5a of the L-shaped backing seat 5 described later on the back surface 2b to prevent the protrusion and the protrusion amount of the blade edge
c is formed.

The cutting edge is a discontinuous cutting edge line in which cutting edge portions 2d and cutting edge missing portions 2e in which the cutting edges are cut are provided alternately. Further, the length a of the cutting edge portion 2d and the length b of the cutting edge lacking portion 2e are almost the same size, but to be exact, a> b is formed. A blade tip 2f referred to as a blur may be provided at both ends of each blade portion 2d in the blade length direction (FIG. 3). The length h of the spare blade 2 of the present embodiment is set to h = i-c with respect to the plane cutting effective cutting length i (FIG. 2). Where c
Is the length of the stopper 3 described below, where a <c <b.

The plane body 1 has a central hole 1h which is fitted to the rotary shaft of the machine, and the rings 4A and 4B which are respectively fitted to the central bosses 1d at both ends are attached to the side surface 1e of the plane by a plurality of bolts 4a. The stoppers 3 are fixedly fitted in the respective tool grooves of the plane body 1 alternately toward the inner side surfaces of the rings 4A and 4B, and fixed to the groove bottom 1c by bolts 3a.

FIG. 2 is an exploded view for explaining the arrangement of the above-mentioned spare blade 2, and the spare blade 2 is provided with stoppers 3 which are arranged one by one on the rings 4A side and 4B side. The axial position is naturally determined, and the replacement blades 2 in the cutting tool groove in front of the rotation direction and the replacement blades 2 behind them are arranged so that the cutting regions are different, and the blade tip missing portion of the replacement blade 2 at the tip is arranged. The uncut portion 2e is cut by the blade tip portion 2d of the rear spare blade 2.

However, as described above, the length a of the cutting edge portion 2d is
Is formed so as to be slightly a> b from the length b of the cutting edge missing portion 2e, and the cutting regions are slightly overlapped to the extent that no uncut residue finally occurs. Therefore, by providing the blur 2f, it is possible to make the step difference that appears linearly on the cutting surface inconspicuous due to the slight difference in the blade diameter (cutting diameter) of each blade portion 2d when there is no blur. In this embodiment, the ring 4A,
4B also acts as one stopper.

An example of a centrifugal fixing means for detachably fixing the spare blade 2 to the first side surface 1a of the cutter groove is, as shown in FIG. 5, a spare blade 2 having a reference jaw surface 7a on the bottom surface 1c of the cutter groove. A back seat locking plate 7 having a length equal to the length h of
The L-shaped backing seat 5 having the same length as the spare blade 2 is inserted into the blade groove by engaging the lower surface of the jaw surface 7a with the upper surface serving as the reference of the lower L-shaped bottom side projection 5b. There is.

Blind holes 1f are formed at a plurality of axial positions just below the L-shaped backing 5 on the bottom surface 1c of the tool groove.
A spring 8 is inserted therein and lifts the L-shaped backing 5 from below to constantly urge the upper surface of the protrusion 5b to abut the jaw surface 7a. A sloped surface 5c is formed near the top of the side surface of the L-shaped backing plate 5 facing the second side surface 1b of the tool groove so that the entrance side of the tool groove becomes narrow.

The centrifugal fixing plate 9 has a length equal to the length h of the spare blade 2, and is adapted to the angle formed by the second side surface 1b of the blade groove and the sloped surface 5c of the L-shaped backing plate 5 facing the second side surface 1b. Has a wedge-shaped cross-section, and the second side surface 1b and the sloped surface 5 of the L-shaped backing 5
It is inserted between c and up and down so that it can move vertically. Back plate locking plate 7
Has a plurality of through holes 7b in the longitudinal direction,
The centrifugal fixing plate 9 is the spring 1 inserted in the through hole 7b.
0 always biases outward and is biased by itself, and the replacement blade 2 is pressed and held by the first side surface 1a of the tool groove by the wedge effect with the L-shaped backing 5.

Further, a locking groove 1g with which the upper end corner portion of the centrifugal fixing plate 9 engages is axially carved in the position of the upper edge of the second side surface 1b of the blade groove over the width of the plane, and the centrifugal fixing plate 9 is formed. A groove 9b is formed over the entire length of the surface 9a of the blade groove facing the second side wall 1b so as not to interfere with the engagement groove 1g.

Next, the operation of the present embodiment will be described.
In order to newly install the spare blade 2 on the plane body 1, it is first checked whether or not the stoppers 3 are inserted and fixed one by one on the ring 4A side and the ring 4B side of the four tool grooves.

Next, the position of the blade groove on the top surface of the centrifugal fixing plate 9 near the second side face 1b is pushed to move the centrifugal fixing plate 9 to the back of the blade groove against the force of the spring 10, and the upper end of the side face 9a is engaged. When pushed in until the stopper groove 1g is engaged with the upper end surface, the centrifugal fixing plate 9 is brought into a locked state by the force of the spring 10 as shown in FIG. Then, the upper end of the L-shaped backing 5 is tilted toward the centrifugal fixing plate 9 by the force of the spring 8, and the replacement blade 2 is inserted between the first side surface 1a of the tool groove and the engaging convex portion 5a of the L-shaped backing 5. There is a space that can be inserted from above.

Next, the spare blade 2 is inserted into this space, and the engaging concave portion 2c of the spare blade 2 is brought into engagement with the engaging convex portion 5a of the L-shaped backing plate 5 while L of the top of the centrifugal fixing plate 9 is engaged. When the position near the mold backing plate 5 is pressed to release the engagement with the locking groove 1g and the pressing force is released, the centrifugal fixing plate 9 is moved outward by the force of the spring 10 and the wedge surface is L. The engaging convex portion 5a at the upper portion of the L-shaped backing plate 5 contacts the sloped surface 5c of the mold backing plate 5 and moves to the first side face 1a side of the tool groove, and the engagement between the first side face 1a and the L-shaped backing plate 5 is made. The replacement blade 2 is pressed and sandwiched by the fitting convex portion 5a. When the replacement blade 2 is mounted between the ring 4A or 4B of the four tool grooves and the stopper 3 in this way, the arrangement of each blade tip portion 2d and the blade tip lacking portion 2e naturally expands. The shape is as shown in.

Then, when the motor is turned on and the plane is rotated, the centrifugal fixing plate 9 is moved outward by centrifugal force, and the inclined surface 5c of the L-shaped backing 5 and the wedge surface of the centrifugal fixing plate 9 are separated. By the wedge action, the engaging convex portion 5a presses the engaging concave portion 2c to fix the replaceable blade 2 in the tool groove. At this time, the upper surface of the engaging convex portion 5b of the L-shaped backing plate 5 is pressed against the jaw surface 7a serving as the reference of the backing plate locking plate 7 by centrifugal force, so that the diameters of the cutting edges do not become uneven.

In this embodiment, the stopper 3 and the ring 4A or 4B, which come into contact with both ends of the spare blade 2, are provided to regulate the axial position of the spare blade 2, but the spare blade 2 is provided on the inner surface of the ring 4A or 4B. If it is attached while pressing it against the stopper 3
The same effect can be obtained without. Further, the stopper 3 has a shape that almost fills the blade groove to prevent adhesion of cutting debris into the blade groove. However, if the axial position of the spare blade 2 is restricted, a simple pin or small piece can be used. It is also possible to just attach such as instead of the stopper. Further, although the spare blade 2 can be inverted and used twice, the present invention is not limited to this replaceable blade that can be reversed and used.

[Embodiment 2] The spare blade 12 of the split-cutting type plane of Embodiment 2 has a cutting edge portion 12d having a length a and a cutting edge missing portion 12e having a length b as shown in the exploded view of FIG. Is the same as the spare blade 2 of the first embodiment in that and are alternately provided to form a discontinuous blade edge line, but the length b of the blade tip missing portion 12e is 2 of the length a of the blade tip portion 12d. It is formed to have a size slightly shorter than the double length (2a) by the amount of overlap, and three blade grooves are engraved on the outer periphery of the plane body 11 in the axial direction across the body width.

The length h of the spare blade 12 is shorter than the effective cutting length (cylinder width) i of the plane cylinder by the length c of the stopper 13A (h
= Ic), the size of c is almost the same as that of b, but the size of the stopper 1 is slightly longer than the size of the overlap.
Stopper 13 having a half length (c / 2) of the length c of 3A
B is also prepared. In this example, a> (c / 2), c
> B.

The spare blade 12 is, for example, the first of the three blade grooves.
Stoppers 13A on the ring 4B side of the tool groove, and stoppers 13B on both ends of the second tool groove, respectively.
By inserting and fixing the stoppers 13A on the ring 4A side of the third blade groove, the axial position of each spare blade 12 is regulated. Therefore, during cutting, the cutting edge portions 12d of the three spare blades 12 perform cutting while interpolating the uncut portions, so that the same effect as that of the plane body of the first embodiment can be obtained. It should be noted that, except for the above, it is the same as in the first embodiment.

[Embodiment 3] The spare blade 2 of the split cutting type hosel of Embodiment 3 is the same as the spare blade of Embodiment 1 in which the blade tip portions 2d and the blade tip missing portions 2e are formed at equal pitches. Then, a spiral groove 21b shallower than the blade groove is formed so as to connect the blade tip missing portion 2e of each spare blade 2 mounted in the blade groove of the outer periphery 21a of the plane body 21 shown in FIG. This is the same as in the first embodiment.

Therefore, by providing the spiral groove 21b, the difference in outer diameter between the cutting edge missing portion 2e and the plane body 21 can be reduced, and the turbulence of the air during rotation can be reduced, and the noise during rotation can be reduced. Can be reduced.

[Embodiment 4] The split cutting type hosel of the fourth embodiment is the same as the hosel body 1 of the first embodiment as shown in FIGS. 8 and 9.
The spare blade 22 or 32 having no blade tip missing part is attached to the. The replaceable blade 22 of FIG. 8 has a length h that is approximately 1/4 of the plane cutting effective cutting length (cylinder width) i, and is formed in a dimension slightly longer by the amount of overlap. The stopper is a stopper 23A having a length c = i−h and a stopper 23B having a length c / 3.
And a stopper 23C having a length of 2c / 3 are prepared. Then, the stoppers 23A, 23B, and 23C having these three types of lengths are inserted and fixed to the positions in the tool groove as shown in the exploded view layout explanatory view of FIG. 8 to regulate the axial position of the spare blade 22. .

The replaceable blade 32 shown in FIG. 9 is formed to have a length h which is approximately 1/2 of the effective cutting length (cylinder width) i of the plane and is slightly longer by the amount of overlap. Then, the stopper 33 having a length of c = i-h is arranged in zigzag by being brought close to the inner side surface of the ring 4A or 4B as shown in the exploded view layout explanatory view of FIG. 9 to regulate the axial position of the spare blade 32. However, the same effect can be obtained.

[0032]

Since the split-cutting type plane of the present invention is constructed as described above, it has the following effects. Insert a spare blade of the same size and shape shorter than the effective cutting length of the plane, by shifting the relative position in the axial direction so that the spare blade in the tool groove on the front side in the rotation direction and the spare blade behind this spare blade have different cutting areas. Since it is a plane made up of one spare blade for each blade groove, it is the smallest number of spare blades that can be installed, the cutting effect equivalent to that of conventional split cutting can be obtained, and the replacement blade replacement time can be greatly shortened. it can.

Further, since the replaceable blade is provided with the cutting edge portion and the cutting edge lacking portion and the cutting edge line is discontinuous, the condition that the cutting areas of the front and rear cutting edge portions are different from each other for each one cutting blade It is possible to arbitrarily set the number of divided cuttings within the range of, and it is possible to obtain a divided cutting type hosel that more suits the processing conditions.

Further, since the spiral groove is provided on the outer circumference of the plane body so as to be continuous with the blade tip missing portion of the replacement blade, the outer diameter difference between the blade tip missing portion and the plane behind the rotation is reduced, and the blade is rotating. The turbulence of the air flow is reduced and the noise can be reduced.

[Brief description of drawings]

FIG. 1 is a view of a spare blade having a cutting edge portion and a cutting edge missing portion according to a first embodiment of a split cutting plane of the present invention, in which (a) is a front view;
(B) A side view, (c) is an AA line sectional view of (a).

FIG. 2 is a layout explanatory view showing, in an exploded view, a state in which the spare blade of the first embodiment is attached to a plane body.

FIG. 3 is an explanatory diagram of blurring of an end portion of a cutting blade portion.

FIG. 4 is a drawing of the plane of Example 1, (a) is a front view,
(B) is a side view.

5A and 5B are enlarged views of a blade groove portion of the plane of FIG. 4, where FIG. 5A shows a state in which a spare blade is fixed, and FIG. 5B shows a state in which the spare blade can be replaced.

FIG. 6 is a layout explanatory view showing a state in which the spare blade of the second embodiment is mounted on the main body of the plane body in an exploded view.

FIG. 7 is a front view of a plane member having spiral grooves on the outer periphery of the third embodiment.

FIG. 8 is a layout explanatory view showing, in a developed manner, a state in which a spare blade without a cutting edge portion of Example 4 is attached to a plane body.

FIG. 9 is an arrangement explanatory view showing, in a developed view, a state in which a spare blade having no blade tip missing portion of the fourth embodiment is mounted on a plane body.

FIG. 10 is a view of a prior art split cutting type plane, (a)
Is a front view, (b) is a side view, and (c) is a development view of a blade groove portion.

[Explanation of reference symbols] 1,11,21 Fram body 2,12,22,32 Replacement blades 2d, 12d Blade tip portions 2e, 12e Blade tip missing portions 3,13A, 13B, 23A, 23B, 23C, 33
Stopper 4A, 4B Ring 5 L-type backing plate 7 Backing plate locking plate 9 Centrifugal fixing plate

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[Procedure amendment]

[Submission date] October 26, 1995

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction contents]

The cutting edge is a discontinuous cutting edge line in which cutting edge portions 2d and cutting edge missing portions 2e in which the cutting edges are cut are provided alternately. Further, the length a of the cutting edge portion 2d and the length b of the cutting edge lacking portion 2e are almost the same size, but to be exact, a> b is formed. A blade tip 2f referred to as a blur may be provided at both ends of each blade portion 2d in the blade length direction (FIG. 3). The length h of the spare blade 2 of the present embodiment is set to h = i-c with respect to the plane cutting effective cutting length i (FIG. 2). Where c
Is the length of the stopper 3 described later, and a>c> b .

[Procedure amendment 2]

[Document name to be amended] Drawing

[Correction target item name] Figure 3

[Correction method] Change

[Correction contents]

[Figure 3]

[Procedure 3]

[Document name to be amended] Drawing

[Correction target item name] Figure 9

[Correction method] Change

[Correction contents]

[Figure 9]

[Procedure amendment 4]

[Document name to be amended] Drawing

[Name of item to be corrected] Fig. 10

[Correction method] Change

[Correction contents]

[Figure 10]

Claims (3)

[Claims] 1. A plane in which a spare blade is removably attached to each of a plurality of tool grooves formed in an outer periphery of a cylindrical plane body parallel to an axis of rotation over an effective cutting length. The replacement blade mounted in the blade groove is formed to be shorter than the effective cutting length of the plane and has the same size and shape, and the position in the rotation axis direction is regulated by at least one stopper, and the replacement blade is located in front of and behind the rotation direction. The divided cutting plane is characterized by arranging different cutting areas. 2. A plane in which a spare blade is detachably attached to each of a plurality of tool grooves formed in an outer periphery of a cylindrical plane body parallel to a rotation axis over an effective cutting length. The replacement blade mounted in the tool groove is shorter than the effective cutting length of the plane and has the same size and shape, and the cutting edge portion and the cutting edge missing portion are alternately provided to form a discontinuous cutting edge line, A split cutting type hosel, wherein the position is restricted by a stopper on at least one side, and the cutting areas of the cutting edge portions in the front and rear of the rotation direction are arranged to be different from each other. 3. The replaceable blade is provided with a cutting edge missing portion at an equal pitch, and a spiral groove shallower than a tool groove is provided on the outer periphery of the plane body so as to be continuous with the cutting edge missing portion having an equal pitch. Split cutting plane body described in 2.